Replaced glLoadGen loader with glad loader and dynamically load EGL and GLES extensions as is done for desktop GL.

examples/CMakeLists.txt

@@ -1,5 +1,3 @@
-
-
 # CLI based examples
 if (NOT SFML_OS_IOS)
     if(SFML_BUILD_NETWORK)

examples/X11/CMakeLists.txt

@@ -7,4 +7,4 @@ set(SRC ${SRCROOT}/X11.cpp)
 # define the X11 target
 sfml_add_example(X11Example GUI_APP
                  SOURCES ${SRC}
-                 DEPENDS sfml-window OpenGL X11)
+                 DEPENDS sfml-window X11)

examples/X11/X11.cpp

@@ -4,7 +4,10 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Window.hpp>
 #include <SFML/System/Err.hpp>
-#include <SFML/OpenGL.hpp>
+
+#define GLAD_GL_IMPLEMENTATION
+#include "gl.h"
+
 #include <X11/Xlib.h>
 #include <iostream>
 #include <cmath>
@@ -23,7 +26,13 @@ void initialize(sf::Window& window)
 
     // Setup OpenGL states
     // Set color and depth clear value
+
+#ifdef SFML_OPENGL_ES
+    glClearDepthf(1.f);
+#else
     glClearDepth(1.f);
+#endif
+
     glClearColor(0.f, 0.5f, 0.5f, 0.f);
 
     // Enable Z-buffer read and write
@@ -33,9 +42,14 @@ void initialize(sf::Window& window)
     // Setup a perspective projection
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    static const double pi = 3.141592654;
+    static const float pi = 3.141592654f;
-    GLdouble extent = std::tan(90.0 * pi / 360.0);
+    float extent = std::tan(90.0f * pi / 360.0f);
-    glFrustum(-extent, extent, -extent, extent, 1.0, 500.0);
+
+#ifdef SFML_OPENGL_ES
+    glFrustumf(-extent, extent, -extent, extent, 1.0f, 500.0f);
+#else
+    glFrustum(-extent, extent, -extent, extent, 1.0f, 500.0f);
+#endif
 
     // Enable position and texture coordinates vertex components
     glEnableClientState(GL_VERTEX_ARRAY);
@@ -177,6 +191,15 @@ int main()
     // Create a clock for measuring elapsed time
     sf::Clock clock;
 
+    // Load OpenGL or OpenGL ES entry points using glad
+    sfmlView1.setActive();
+
+#ifdef SFML_OPENGL_ES
+    gladLoadGLES1(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#else
+    gladLoadGL(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#endif
+
     // Initialize our views
     initialize(sfmlView1);
     initialize(sfmlView2);

examples/opengl/CMakeLists.txt

@@ -16,5 +16,5 @@ endif()
 sfml_add_example(opengl GUI_APP
                  SOURCES ${SRC}
                  BUNDLE_RESOURCES ${RESOURCES}
-                 DEPENDS sfml-graphics OpenGL
+                 DEPENDS sfml-graphics
                  RESOURCES_DIR resources)

examples/opengl/OpenGL.cpp

@@ -3,17 +3,14 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Graphics.hpp>
-#include <SFML/OpenGL.hpp>
+
+#define GLAD_GL_IMPLEMENTATION
+#include "gl.h"
 
 #ifdef SFML_SYSTEM_IOS
 #include <SFML/Main.hpp>
 #endif
 
-#ifdef SFML_OPENGL_ES
-#define glClearDepth glClearDepthf
-#define glFrustum glFrustumf
-#endif
-
 #ifndef GL_SRGB8_ALPHA8
 #define GL_SRGB8_ALPHA8 0x8C43
 #endif
@@ -83,10 +80,21 @@ int main()
         // Make the window the active window for OpenGL calls
         window.setActive(true);
 
+        // Load OpenGL or OpenGL ES entry points using glad
+#ifdef SFML_OPENGL_ES
+        gladLoadGLES1(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#else
+        gladLoadGL(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#endif
+
         // Enable Z-buffer read and write
         glEnable(GL_DEPTH_TEST);
         glDepthMask(GL_TRUE);
+#ifdef SFML_OPENGL_ES
+        glClearDepthf(1.f);
+#else
         glClearDepth(1.f);
+#endif
 
         // Disable lighting
         glDisable(GL_LIGHTING);
@@ -98,7 +106,11 @@ int main()
         glMatrixMode(GL_PROJECTION);
         glLoadIdentity();
         GLfloat ratio = static_cast<float>(window.getSize().x) / window.getSize().y;
+#ifdef SFML_OPENGL_ES
+        glFrustumf(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#else
         glFrustum(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#endif
 
         // Bind the texture
         glEnable(GL_TEXTURE_2D);
@@ -229,7 +241,11 @@ int main()
                     glMatrixMode(GL_PROJECTION);
                     glLoadIdentity();
                     GLfloat ratio = static_cast<float>(event.size.width) / event.size.height;
+#ifdef SFML_OPENGL_ES
+                    glFrustumf(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#else
                     glFrustum(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#endif
 
                     // Make the window no longer the active window for OpenGL calls
                     window.setActive(false);

examples/window/CMakeLists.txt

@@ -7,4 +7,4 @@ set(SRC ${SRCROOT}/Window.cpp)
 # define the window target
 sfml_add_example(window GUI_APP
                  SOURCES ${SRC}
-                 DEPENDS sfml-window OpenGL)
+                 DEPENDS sfml-window)

examples/window/Window.cpp

@@ -2,17 +2,14 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Window.hpp>
-#include <SFML/OpenGL.hpp>
+
+#define GLAD_GL_IMPLEMENTATION
+#include "gl.h"
 
 #ifdef SFML_SYSTEM_IOS
 #include <SFML/Main.hpp>
 #endif
 
-#ifdef SFML_OPENGL_ES
-#define glClearDepth glClearDepthf
-#define glFrustum glFrustumf
-#endif
-
 ////////////////////////////////////////////////////////////
 /// Entry point of application
 ///
@@ -31,8 +28,19 @@ int main()
     // Make it the active window for OpenGL calls
     window.setActive();
 
+    // Load OpenGL or OpenGL ES entry points using glad
+#ifdef SFML_OPENGL_ES
+    gladLoadGLES1(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#else
+    gladLoadGL(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#endif
+
     // Set the color and depth clear values
+#ifdef SFML_OPENGL_ES
+    glClearDepthf(1.f);
+#else
     glClearDepth(1.f);
+#endif
     glClearColor(0.f, 0.f, 0.f, 1.f);
 
     // Enable Z-buffer read and write
@@ -50,7 +58,11 @@ int main()
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     GLfloat ratio = static_cast<float>(window.getSize().x) / window.getSize().y;
+#ifdef SFML_OPENGL_ES
+    glFrustumf(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#else
     glFrustum(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#endif
 
     // Define a 3D cube (6 faces made of 2 triangles composed by 3 vertices)
     GLfloat cube[] =
@@ -134,7 +146,11 @@ int main()
                 glMatrixMode(GL_PROJECTION);
                 glLoadIdentity();
                 GLfloat ratio = static_cast<float>(event.size.width) / event.size.height;
+#ifdef SFML_OPENGL_ES
+                glFrustumf(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#else
                 glFrustum(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
+#endif
             }
         }
 

extlibs/headers/glad/include/glad/wgl.h

@@ -0,0 +1,586 @@
+/**
+ * Loader generated by glad 2.0.0-beta on Wed Jul 17 02:23:29 2019
+ *
+ * Generator: C/C++
+ * Specification: wgl
+ * Extensions: 10
+ *
+ * APIs:
+ *  - wgl=1.0
+ *
+ * Options:
+ *  - MX_GLOBAL = False
+ *  - ON_DEMAND = False
+ *  - LOADER = True
+ *  - ALIAS = True
+ *  - HEADER_ONLY = True
+ *  - DEBUG = False
+ *  - MX = False
+ *
+ * Commandline:
+ *    --api='wgl=1.0' --extensions='WGL_ARB_create_context,WGL_ARB_create_context_profile,WGL_ARB_extensions_string,WGL_ARB_framebuffer_sRGB,WGL_ARB_multisample,WGL_ARB_pbuffer,WGL_ARB_pixel_format,WGL_EXT_extensions_string,WGL_EXT_framebuffer_sRGB,WGL_EXT_swap_control' c --loader --alias --header-only
+ *
+ * Online:
+ *    http://glad.sh/#api=wgl%3D1.0&extensions=WGL_ARB_create_context%2CWGL_ARB_create_context_profile%2CWGL_ARB_extensions_string%2CWGL_ARB_framebuffer_sRGB%2CWGL_ARB_multisample%2CWGL_ARB_pbuffer%2CWGL_ARB_pixel_format%2CWGL_EXT_extensions_string%2CWGL_EXT_framebuffer_sRGB%2CWGL_EXT_swap_control&generator=c&options=LOADER%2CALIAS%2CHEADER_ONLY
+ *
+ */
+
+#ifndef SF_GLAD_WGL_H_
+#define SF_GLAD_WGL_H_
+
+#include <windows.h>
+#include <glad/gl.h>
+
+#define SF_GLAD_WGL
+#define GLAD_OPTION_WGL_LOADER
+#define GLAD_OPTION_WGL_ALIAS
+#define GLAD_OPTION_WGL_HEADER_ONLY
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef GLAD_PLATFORM_H_
+#define GLAD_PLATFORM_H_
+
+#ifndef GLAD_PLATFORM_WIN32
+  #if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__MINGW32__)
+    #define GLAD_PLATFORM_WIN32 1
+  #else
+    #define GLAD_PLATFORM_WIN32 0
+  #endif
+#endif
+
+#ifndef GLAD_PLATFORM_APPLE
+  #ifdef __APPLE__
+    #define GLAD_PLATFORM_APPLE 1
+  #else
+    #define GLAD_PLATFORM_APPLE 0
+  #endif
+#endif
+
+#ifndef GLAD_PLATFORM_EMSCRIPTEN
+  #ifdef __EMSCRIPTEN__
+    #define GLAD_PLATFORM_EMSCRIPTEN 1
+  #else
+    #define GLAD_PLATFORM_EMSCRIPTEN 0
+  #endif
+#endif
+
+#ifndef GLAD_PLATFORM_UWP
+  #if defined(_MSC_VER) && !defined(GLAD_INTERNAL_HAVE_WINAPIFAMILY)
+    #ifdef __has_include
+      #if __has_include(<winapifamily.h>)
+        #define GLAD_INTERNAL_HAVE_WINAPIFAMILY 1
+      #endif
+    #elif _MSC_VER >= 1700 && !_USING_V110_SDK71_
+      #define GLAD_INTERNAL_HAVE_WINAPIFAMILY 1
+    #endif
+  #endif
+
+  #ifdef GLAD_INTERNAL_HAVE_WINAPIFAMILY
+    #include <winapifamily.h>
+    #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+      #define GLAD_PLATFORM_UWP 1
+    #endif
+  #endif
+
+  #ifndef GLAD_PLATFORM_UWP
+    #define GLAD_PLATFORM_UWP 0
+  #endif
+#endif
+
+#ifdef __GNUC__
+  #define GLAD_GNUC_EXTENSION __extension__
+#else
+  #define GLAD_GNUC_EXTENSION
+#endif
+
+#ifndef GLAD_API_CALL
+  #if defined(GLAD_API_CALL_EXPORT)
+    #if GLAD_PLATFORM_WIN32 || defined(__CYGWIN__)
+      #if defined(GLAD_API_CALL_EXPORT_BUILD)
+        #if defined(__GNUC__)
+          #define GLAD_API_CALL __attribute__ ((dllexport)) extern
+        #else
+          #define GLAD_API_CALL __declspec(dllexport) extern
+        #endif
+      #else
+        #if defined(__GNUC__)
+          #define GLAD_API_CALL __attribute__ ((dllimport)) extern
+        #else
+          #define GLAD_API_CALL __declspec(dllimport) extern
+        #endif
+      #endif
+    #elif defined(__GNUC__) && defined(GLAD_API_CALL_EXPORT_BUILD)
+      #define GLAD_API_CALL __attribute__ ((visibility ("default"))) extern
+    #else
+      #define GLAD_API_CALL extern
+    #endif
+  #else
+    #define GLAD_API_CALL extern
+  #endif
+#endif
+
+#ifdef APIENTRY
+  #define GLAD_API_PTR APIENTRY
+#elif GLAD_PLATFORM_WIN32
+  #define GLAD_API_PTR __stdcall
+#else
+  #define GLAD_API_PTR
+#endif
+
+#ifndef GLAPI
+#define GLAPI GLAD_API_CALL
+#endif
+
+#ifndef GLAPIENTRY
+#define GLAPIENTRY GLAD_API_PTR
+#endif
+
+#define GLAD_MAKE_VERSION(major, minor) (major * 10000 + minor)
+#define GLAD_VERSION_MAJOR(version) (version / 10000)
+#define GLAD_VERSION_MINOR(version) (version % 10000)
+
+#define GLAD_GENERATOR_VERSION "2.0.0-beta"
+
+typedef void (*GLADapiproc)(void);
+
+typedef GLADapiproc (*GLADloadfunc)(const char *name);
+typedef GLADapiproc (*GLADuserptrloadfunc)(void *userptr, const char *name);
+
+typedef void (*GLADprecallback)(const char *name, GLADapiproc apiproc, int len_args, ...);
+typedef void (*GLADpostcallback)(void *ret, const char *name, GLADapiproc apiproc, int len_args, ...);
+
+#endif /* GLAD_PLATFORM_H_ */
+
+#define ERROR_INVALID_PROFILE_ARB 0x2096
+#define ERROR_INVALID_VERSION_ARB 0x2095
+#define WGL_ACCELERATION_ARB 0x2003
+#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
+#define WGL_ACCUM_BITS_ARB 0x201D
+#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
+#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
+#define WGL_ACCUM_RED_BITS_ARB 0x201E
+#define WGL_ALPHA_BITS_ARB 0x201B
+#define WGL_ALPHA_SHIFT_ARB 0x201C
+#define WGL_AUX_BUFFERS_ARB 0x2024
+#define WGL_BLUE_BITS_ARB 0x2019
+#define WGL_BLUE_SHIFT_ARB 0x201A
+#define WGL_COLOR_BITS_ARB 0x2014
+#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
+#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
+#define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001
+#define WGL_CONTEXT_FLAGS_ARB 0x2094
+#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
+#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
+#define WGL_DEPTH_BITS_ARB 0x2022
+#define WGL_DOUBLE_BUFFER_ARB 0x2011
+#define WGL_DRAW_TO_BITMAP_ARB 0x2002
+#define WGL_DRAW_TO_PBUFFER_ARB 0x202D
+#define WGL_DRAW_TO_WINDOW_ARB 0x2001
+#define WGL_FONT_LINES 0
+#define WGL_FONT_POLYGONS 1
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20A9
+#define WGL_FULL_ACCELERATION_ARB 0x2027
+#define WGL_GENERIC_ACCELERATION_ARB 0x2026
+#define WGL_GREEN_BITS_ARB 0x2017
+#define WGL_GREEN_SHIFT_ARB 0x2018
+#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030
+#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E
+#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F
+#define WGL_NEED_PALETTE_ARB 0x2004
+#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
+#define WGL_NO_ACCELERATION_ARB 0x2025
+#define WGL_NUMBER_OVERLAYS_ARB 0x2008
+#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
+#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
+#define WGL_PBUFFER_HEIGHT_ARB 0x2035
+#define WGL_PBUFFER_LARGEST_ARB 0x2033
+#define WGL_PBUFFER_LOST_ARB 0x2036
+#define WGL_PBUFFER_WIDTH_ARB 0x2034
+#define WGL_PIXEL_TYPE_ARB 0x2013
+#define WGL_RED_BITS_ARB 0x2015
+#define WGL_RED_SHIFT_ARB 0x2016
+#define WGL_SAMPLES_ARB 0x2042
+#define WGL_SAMPLE_BUFFERS_ARB 0x2041
+#define WGL_SHARE_ACCUM_ARB 0x200E
+#define WGL_SHARE_DEPTH_ARB 0x200C
+#define WGL_SHARE_STENCIL_ARB 0x200D
+#define WGL_STENCIL_BITS_ARB 0x2023
+#define WGL_STEREO_ARB 0x2012
+#define WGL_SUPPORT_GDI_ARB 0x200F
+#define WGL_SUPPORT_OPENGL_ARB 0x2010
+#define WGL_SWAP_COPY_ARB 0x2029
+#define WGL_SWAP_EXCHANGE_ARB 0x2028
+#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
+#define WGL_SWAP_MAIN_PLANE 0x00000001
+#define WGL_SWAP_METHOD_ARB 0x2007
+#define WGL_SWAP_OVERLAY1 0x00000002
+#define WGL_SWAP_OVERLAY10 0x00000400
+#define WGL_SWAP_OVERLAY11 0x00000800
+#define WGL_SWAP_OVERLAY12 0x00001000
+#define WGL_SWAP_OVERLAY13 0x00002000
+#define WGL_SWAP_OVERLAY14 0x00004000
+#define WGL_SWAP_OVERLAY15 0x00008000
+#define WGL_SWAP_OVERLAY2 0x00000004
+#define WGL_SWAP_OVERLAY3 0x00000008
+#define WGL_SWAP_OVERLAY4 0x00000010
+#define WGL_SWAP_OVERLAY5 0x00000020
+#define WGL_SWAP_OVERLAY6 0x00000040
+#define WGL_SWAP_OVERLAY7 0x00000080
+#define WGL_SWAP_OVERLAY8 0x00000100
+#define WGL_SWAP_OVERLAY9 0x00000200
+#define WGL_SWAP_UNDEFINED_ARB 0x202A
+#define WGL_SWAP_UNDERLAY1 0x00010000
+#define WGL_SWAP_UNDERLAY10 0x02000000
+#define WGL_SWAP_UNDERLAY11 0x04000000
+#define WGL_SWAP_UNDERLAY12 0x08000000
+#define WGL_SWAP_UNDERLAY13 0x10000000
+#define WGL_SWAP_UNDERLAY14 0x20000000
+#define WGL_SWAP_UNDERLAY15 0x40000000
+#define WGL_SWAP_UNDERLAY2 0x00020000
+#define WGL_SWAP_UNDERLAY3 0x00040000
+#define WGL_SWAP_UNDERLAY4 0x00080000
+#define WGL_SWAP_UNDERLAY5 0x00100000
+#define WGL_SWAP_UNDERLAY6 0x00200000
+#define WGL_SWAP_UNDERLAY7 0x00400000
+#define WGL_SWAP_UNDERLAY8 0x00800000
+#define WGL_SWAP_UNDERLAY9 0x01000000
+#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
+#define WGL_TRANSPARENT_ARB 0x200A
+#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
+#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
+#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
+#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
+#define WGL_TYPE_COLORINDEX_ARB 0x202C
+#define WGL_TYPE_RGBA_ARB 0x202B
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+struct _GPU_DEVICE {
+    DWORD  cb;
+    CHAR   DeviceName[32];
+    CHAR   DeviceString[128];
+    DWORD  Flags;
+    RECT   rcVirtualScreen;
+};
+DECLARE_HANDLE(HPBUFFERARB);
+DECLARE_HANDLE(HPBUFFEREXT);
+DECLARE_HANDLE(HVIDEOOUTPUTDEVICENV);
+DECLARE_HANDLE(HPVIDEODEV);
+DECLARE_HANDLE(HPGPUNV);
+DECLARE_HANDLE(HGPUNV);
+DECLARE_HANDLE(HVIDEOINPUTDEVICENV);
+typedef struct _GPU_DEVICE GPU_DEVICE;
+typedef struct _GPU_DEVICE *PGPU_DEVICE;
+
+
+#define WGL_VERSION_1_0 1
+GLAD_API_CALL int SF_GLAD_WGL_VERSION_1_0;
+#define WGL_ARB_create_context 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_create_context;
+#define WGL_ARB_create_context_profile 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_create_context_profile;
+#define WGL_ARB_extensions_string 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_extensions_string;
+#define WGL_ARB_framebuffer_sRGB 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_framebuffer_sRGB;
+#define WGL_ARB_multisample 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_multisample;
+#define WGL_ARB_pbuffer 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_pbuffer;
+#define WGL_ARB_pixel_format 1
+GLAD_API_CALL int SF_GLAD_WGL_ARB_pixel_format;
+#define WGL_EXT_extensions_string 1
+GLAD_API_CALL int SF_GLAD_WGL_EXT_extensions_string;
+#define WGL_EXT_framebuffer_sRGB 1
+GLAD_API_CALL int SF_GLAD_WGL_EXT_framebuffer_sRGB;
+#define WGL_EXT_swap_control 1
+GLAD_API_CALL int SF_GLAD_WGL_EXT_swap_control;
+
+
+typedef int (GLAD_API_PTR *PFNCHOOSEPIXELFORMATPROC)(HDC hDc, const PIXELFORMATDESCRIPTOR * pPfd);
+typedef int (GLAD_API_PTR *PFNDESCRIBEPIXELFORMATPROC)(HDC hdc, int ipfd, UINT cjpfd, const PIXELFORMATDESCRIPTOR * ppfd);
+typedef UINT (GLAD_API_PTR *PFNGETENHMETAFILEPIXELFORMATPROC)(HENHMETAFILE hemf, const PIXELFORMATDESCRIPTOR * ppfd);
+typedef int (GLAD_API_PTR *PFNGETPIXELFORMATPROC)(HDC hdc);
+typedef BOOL (GLAD_API_PTR *PFNSETPIXELFORMATPROC)(HDC hdc, int ipfd, const PIXELFORMATDESCRIPTOR * ppfd);
+typedef BOOL (GLAD_API_PTR *PFNSWAPBUFFERSPROC)(HDC hdc);
+typedef BOOL (GLAD_API_PTR *PFNWGLCHOOSEPIXELFORMATARBPROC)(HDC hdc, const int * piAttribIList, const FLOAT * pfAttribFList, UINT nMaxFormats, int * piFormats, UINT * nNumFormats);
+typedef BOOL (GLAD_API_PTR *PFNWGLCOPYCONTEXTPROC)(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask);
+typedef HGLRC (GLAD_API_PTR *PFNWGLCREATECONTEXTPROC)(HDC hDc);
+typedef HGLRC (GLAD_API_PTR *PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC hDC, HGLRC hShareContext, const int * attribList);
+typedef HGLRC (GLAD_API_PTR *PFNWGLCREATELAYERCONTEXTPROC)(HDC hDc, int level);
+typedef HPBUFFERARB (GLAD_API_PTR *PFNWGLCREATEPBUFFERARBPROC)(HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int * piAttribList);
+typedef BOOL (GLAD_API_PTR *PFNWGLDELETECONTEXTPROC)(HGLRC oldContext);
+typedef BOOL (GLAD_API_PTR *PFNWGLDESCRIBELAYERPLANEPROC)(HDC hDc, int pixelFormat, int layerPlane, UINT nBytes, const LAYERPLANEDESCRIPTOR * plpd);
+typedef BOOL (GLAD_API_PTR *PFNWGLDESTROYPBUFFERARBPROC)(HPBUFFERARB hPbuffer);
+typedef HGLRC (GLAD_API_PTR *PFNWGLGETCURRENTCONTEXTPROC)(void);
+typedef HDC (GLAD_API_PTR *PFNWGLGETCURRENTDCPROC)(void);
+typedef const char * (GLAD_API_PTR *PFNWGLGETEXTENSIONSSTRINGARBPROC)(HDC hdc);
+typedef const char * (GLAD_API_PTR *PFNWGLGETEXTENSIONSSTRINGEXTPROC)(void);
+typedef int (GLAD_API_PTR *PFNWGLGETLAYERPALETTEENTRIESPROC)(HDC hdc, int iLayerPlane, int iStart, int cEntries, const COLORREF * pcr);
+typedef HDC (GLAD_API_PTR *PFNWGLGETPBUFFERDCARBPROC)(HPBUFFERARB hPbuffer);
+typedef BOOL (GLAD_API_PTR *PFNWGLGETPIXELFORMATATTRIBFVARBPROC)(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int * piAttributes, FLOAT * pfValues);
+typedef BOOL (GLAD_API_PTR *PFNWGLGETPIXELFORMATATTRIBIVARBPROC)(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int * piAttributes, int * piValues);
+typedef PROC (GLAD_API_PTR *PFNWGLGETPROCADDRESSPROC)(LPCSTR lpszProc);
+typedef int (GLAD_API_PTR *PFNWGLGETSWAPINTERVALEXTPROC)(void);
+typedef BOOL (GLAD_API_PTR *PFNWGLMAKECURRENTPROC)(HDC hDc, HGLRC newContext);
+typedef BOOL (GLAD_API_PTR *PFNWGLQUERYPBUFFERARBPROC)(HPBUFFERARB hPbuffer, int iAttribute, int * piValue);
+typedef BOOL (GLAD_API_PTR *PFNWGLREALIZELAYERPALETTEPROC)(HDC hdc, int iLayerPlane, BOOL bRealize);
+typedef int (GLAD_API_PTR *PFNWGLRELEASEPBUFFERDCARBPROC)(HPBUFFERARB hPbuffer, HDC hDC);
+typedef int (GLAD_API_PTR *PFNWGLSETLAYERPALETTEENTRIESPROC)(HDC hdc, int iLayerPlane, int iStart, int cEntries, const COLORREF * pcr);
+typedef BOOL (GLAD_API_PTR *PFNWGLSHARELISTSPROC)(HGLRC hrcSrvShare, HGLRC hrcSrvSource);
+typedef BOOL (GLAD_API_PTR *PFNWGLSWAPINTERVALEXTPROC)(int interval);
+typedef BOOL (GLAD_API_PTR *PFNWGLSWAPLAYERBUFFERSPROC)(HDC hdc, UINT fuFlags);
+typedef BOOL (GLAD_API_PTR *PFNWGLUSEFONTBITMAPSPROC)(HDC hDC, DWORD first, DWORD count, DWORD listBase);
+typedef BOOL (GLAD_API_PTR *PFNWGLUSEFONTBITMAPSAPROC)(HDC hDC, DWORD first, DWORD count, DWORD listBase);
+typedef BOOL (GLAD_API_PTR *PFNWGLUSEFONTBITMAPSWPROC)(HDC hDC, DWORD first, DWORD count, DWORD listBase);
+typedef BOOL (GLAD_API_PTR *PFNWGLUSEFONTOUTLINESPROC)(HDC hDC, DWORD first, DWORD count, DWORD listBase, FLOAT deviation, FLOAT extrusion, int format, LPGLYPHMETRICSFLOAT lpgmf);
+typedef BOOL (GLAD_API_PTR *PFNWGLUSEFONTOUTLINESAPROC)(HDC hDC, DWORD first, DWORD count, DWORD listBase, FLOAT deviation, FLOAT extrusion, int format, LPGLYPHMETRICSFLOAT lpgmf);
+typedef BOOL (GLAD_API_PTR *PFNWGLUSEFONTOUTLINESWPROC)(HDC hDC, DWORD first, DWORD count, DWORD listBase, FLOAT deviation, FLOAT extrusion, int format, LPGLYPHMETRICSFLOAT lpgmf);
+
+GLAD_API_CALL PFNWGLCHOOSEPIXELFORMATARBPROC sf_glad_wglChoosePixelFormatARB;
+#define wglChoosePixelFormatARB sf_glad_wglChoosePixelFormatARB
+GLAD_API_CALL PFNWGLCREATECONTEXTATTRIBSARBPROC sf_glad_wglCreateContextAttribsARB;
+#define wglCreateContextAttribsARB sf_glad_wglCreateContextAttribsARB
+GLAD_API_CALL PFNWGLCREATEPBUFFERARBPROC sf_glad_wglCreatePbufferARB;
+#define wglCreatePbufferARB sf_glad_wglCreatePbufferARB
+GLAD_API_CALL PFNWGLDESTROYPBUFFERARBPROC sf_glad_wglDestroyPbufferARB;
+#define wglDestroyPbufferARB sf_glad_wglDestroyPbufferARB
+GLAD_API_CALL PFNWGLGETEXTENSIONSSTRINGARBPROC sf_glad_wglGetExtensionsStringARB;
+#define wglGetExtensionsStringARB sf_glad_wglGetExtensionsStringARB
+GLAD_API_CALL PFNWGLGETEXTENSIONSSTRINGEXTPROC sf_glad_wglGetExtensionsStringEXT;
+#define wglGetExtensionsStringEXT sf_glad_wglGetExtensionsStringEXT
+GLAD_API_CALL PFNWGLGETPBUFFERDCARBPROC sf_glad_wglGetPbufferDCARB;
+#define wglGetPbufferDCARB sf_glad_wglGetPbufferDCARB
+GLAD_API_CALL PFNWGLGETPIXELFORMATATTRIBFVARBPROC sf_glad_wglGetPixelFormatAttribfvARB;
+#define wglGetPixelFormatAttribfvARB sf_glad_wglGetPixelFormatAttribfvARB
+GLAD_API_CALL PFNWGLGETPIXELFORMATATTRIBIVARBPROC sf_glad_wglGetPixelFormatAttribivARB;
+#define wglGetPixelFormatAttribivARB sf_glad_wglGetPixelFormatAttribivARB
+GLAD_API_CALL PFNWGLGETSWAPINTERVALEXTPROC sf_glad_wglGetSwapIntervalEXT;
+#define wglGetSwapIntervalEXT sf_glad_wglGetSwapIntervalEXT
+GLAD_API_CALL PFNWGLQUERYPBUFFERARBPROC sf_glad_wglQueryPbufferARB;
+#define wglQueryPbufferARB sf_glad_wglQueryPbufferARB
+GLAD_API_CALL PFNWGLRELEASEPBUFFERDCARBPROC sf_glad_wglReleasePbufferDCARB;
+#define wglReleasePbufferDCARB sf_glad_wglReleasePbufferDCARB
+GLAD_API_CALL PFNWGLSWAPINTERVALEXTPROC sf_glad_wglSwapIntervalEXT;
+#define wglSwapIntervalEXT sf_glad_wglSwapIntervalEXT
+
+
+
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif
+
+/* Source */
+#ifdef SF_GLAD_WGL_IMPLEMENTATION
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef GLAD_IMPL_UTIL_C_
+#define GLAD_IMPL_UTIL_C_
+
+#ifdef _MSC_VER
+#define GLAD_IMPL_UTIL_SSCANF sscanf_s
+#else
+#define GLAD_IMPL_UTIL_SSCANF sscanf
+#endif
+
+#endif /* GLAD_IMPL_UTIL_C_ */
+
+
+int SF_GLAD_WGL_VERSION_1_0 = 0;
+int SF_GLAD_WGL_ARB_create_context = 0;
+int SF_GLAD_WGL_ARB_create_context_profile = 0;
+int SF_GLAD_WGL_ARB_extensions_string = 0;
+int SF_GLAD_WGL_ARB_framebuffer_sRGB = 0;
+int SF_GLAD_WGL_ARB_multisample = 0;
+int SF_GLAD_WGL_ARB_pbuffer = 0;
+int SF_GLAD_WGL_ARB_pixel_format = 0;
+int SF_GLAD_WGL_EXT_extensions_string = 0;
+int SF_GLAD_WGL_EXT_framebuffer_sRGB = 0;
+int SF_GLAD_WGL_EXT_swap_control = 0;
+
+
+
+PFNWGLCHOOSEPIXELFORMATARBPROC sf_glad_wglChoosePixelFormatARB = NULL;
+PFNWGLCREATECONTEXTATTRIBSARBPROC sf_glad_wglCreateContextAttribsARB = NULL;
+PFNWGLCREATEPBUFFERARBPROC sf_glad_wglCreatePbufferARB = NULL;
+PFNWGLDESTROYPBUFFERARBPROC sf_glad_wglDestroyPbufferARB = NULL;
+PFNWGLGETEXTENSIONSSTRINGARBPROC sf_glad_wglGetExtensionsStringARB = NULL;
+PFNWGLGETEXTENSIONSSTRINGEXTPROC sf_glad_wglGetExtensionsStringEXT = NULL;
+PFNWGLGETPBUFFERDCARBPROC sf_glad_wglGetPbufferDCARB = NULL;
+PFNWGLGETPIXELFORMATATTRIBFVARBPROC sf_glad_wglGetPixelFormatAttribfvARB = NULL;
+PFNWGLGETPIXELFORMATATTRIBIVARBPROC sf_glad_wglGetPixelFormatAttribivARB = NULL;
+PFNWGLGETSWAPINTERVALEXTPROC sf_glad_wglGetSwapIntervalEXT = NULL;
+PFNWGLQUERYPBUFFERARBPROC sf_glad_wglQueryPbufferARB = NULL;
+PFNWGLRELEASEPBUFFERDCARBPROC sf_glad_wglReleasePbufferDCARB = NULL;
+PFNWGLSWAPINTERVALEXTPROC sf_glad_wglSwapIntervalEXT = NULL;
+
+
+static void sf_glad_wgl_load_WGL_ARB_create_context(GLADuserptrloadfunc load, void *userptr) {
+    if(!SF_GLAD_WGL_ARB_create_context) return;
+    sf_glad_wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) load(userptr, "wglCreateContextAttribsARB");
+}
+static void sf_glad_wgl_load_WGL_ARB_extensions_string(GLADuserptrloadfunc load, void *userptr) {
+    if(!SF_GLAD_WGL_ARB_extensions_string) return;
+    sf_glad_wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) load(userptr, "wglGetExtensionsStringARB");
+}
+static void sf_glad_wgl_load_WGL_ARB_pbuffer(GLADuserptrloadfunc load, void *userptr) {
+    if(!SF_GLAD_WGL_ARB_pbuffer) return;
+    sf_glad_wglCreatePbufferARB = (PFNWGLCREATEPBUFFERARBPROC) load(userptr, "wglCreatePbufferARB");
+    sf_glad_wglDestroyPbufferARB = (PFNWGLDESTROYPBUFFERARBPROC) load(userptr, "wglDestroyPbufferARB");
+    sf_glad_wglGetPbufferDCARB = (PFNWGLGETPBUFFERDCARBPROC) load(userptr, "wglGetPbufferDCARB");
+    sf_glad_wglQueryPbufferARB = (PFNWGLQUERYPBUFFERARBPROC) load(userptr, "wglQueryPbufferARB");
+    sf_glad_wglReleasePbufferDCARB = (PFNWGLRELEASEPBUFFERDCARBPROC) load(userptr, "wglReleasePbufferDCARB");
+}
+static void sf_glad_wgl_load_WGL_ARB_pixel_format(GLADuserptrloadfunc load, void *userptr) {
+    if(!SF_GLAD_WGL_ARB_pixel_format) return;
+    sf_glad_wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC) load(userptr, "wglChoosePixelFormatARB");
+    sf_glad_wglGetPixelFormatAttribfvARB = (PFNWGLGETPIXELFORMATATTRIBFVARBPROC) load(userptr, "wglGetPixelFormatAttribfvARB");
+    sf_glad_wglGetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) load(userptr, "wglGetPixelFormatAttribivARB");
+}
+static void sf_glad_wgl_load_WGL_EXT_extensions_string(GLADuserptrloadfunc load, void *userptr) {
+    if(!SF_GLAD_WGL_EXT_extensions_string) return;
+    sf_glad_wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) load(userptr, "wglGetExtensionsStringEXT");
+}
+static void sf_glad_wgl_load_WGL_EXT_swap_control(GLADuserptrloadfunc load, void *userptr) {
+    if(!SF_GLAD_WGL_EXT_swap_control) return;
+    sf_glad_wglGetSwapIntervalEXT = (PFNWGLGETSWAPINTERVALEXTPROC) load(userptr, "wglGetSwapIntervalEXT");
+    sf_glad_wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) load(userptr, "wglSwapIntervalEXT");
+}
+
+
+static void sf_glad_wgl_resolve_aliases(void) {
+}
+
+static int sf_glad_wgl_has_extension(HDC hdc, const char *ext) {
+    const char *terminator;
+    const char *loc;
+    const char *extensions;
+
+    if(wglGetExtensionsStringEXT == NULL && wglGetExtensionsStringARB == NULL)
+        return 0;
+
+    if(wglGetExtensionsStringARB == NULL || hdc == INVALID_HANDLE_VALUE)
+        extensions = wglGetExtensionsStringEXT();
+    else
+        extensions = wglGetExtensionsStringARB(hdc);
+
+    if(extensions == NULL || ext == NULL)
+        return 0;
+
+    while(1) {
+        loc = strstr(extensions, ext);
+        if(loc == NULL)
+            break;
+
+        terminator = loc + strlen(ext);
+        if((loc == extensions || *(loc - 1) == ' ') &&
+            (*terminator == ' ' || *terminator == '\0'))
+        {
+            return 1;
+        }
+        extensions = terminator;
+    }
+
+    return 0;
+}
+
+static GLADapiproc sf_glad_wgl_get_proc_from_userptr(void *userptr, const char* name) {
+    return (GLAD_GNUC_EXTENSION (GLADapiproc (*)(const char *name)) userptr)(name);
+}
+
+static int sf_glad_wgl_find_extensions_wgl(HDC hdc) {
+    SF_GLAD_WGL_ARB_create_context = sf_glad_wgl_has_extension(hdc, "WGL_ARB_create_context");
+    SF_GLAD_WGL_ARB_create_context_profile = sf_glad_wgl_has_extension(hdc, "WGL_ARB_create_context_profile");
+    SF_GLAD_WGL_ARB_extensions_string = sf_glad_wgl_has_extension(hdc, "WGL_ARB_extensions_string");
+    SF_GLAD_WGL_ARB_framebuffer_sRGB = sf_glad_wgl_has_extension(hdc, "WGL_ARB_framebuffer_sRGB");
+    SF_GLAD_WGL_ARB_multisample = sf_glad_wgl_has_extension(hdc, "WGL_ARB_multisample");
+    SF_GLAD_WGL_ARB_pbuffer = sf_glad_wgl_has_extension(hdc, "WGL_ARB_pbuffer");
+    SF_GLAD_WGL_ARB_pixel_format = sf_glad_wgl_has_extension(hdc, "WGL_ARB_pixel_format");
+    SF_GLAD_WGL_EXT_extensions_string = sf_glad_wgl_has_extension(hdc, "WGL_EXT_extensions_string");
+    SF_GLAD_WGL_EXT_framebuffer_sRGB = sf_glad_wgl_has_extension(hdc, "WGL_EXT_framebuffer_sRGB");
+    SF_GLAD_WGL_EXT_swap_control = sf_glad_wgl_has_extension(hdc, "WGL_EXT_swap_control");
+    return 1;
+}
+
+static int sf_glad_wgl_find_core_wgl(void) {
+    int major = 1, minor = 0;
+    SF_GLAD_WGL_VERSION_1_0 = (major == 1 && minor >= 0) || major > 1;
+    return GLAD_MAKE_VERSION(major, minor);
+}
+
+static int gladLoadWGLUserPtr(HDC hdc, GLADuserptrloadfunc load, void *userptr) {
+    int version;
+    wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) load(userptr, "wglGetExtensionsStringARB");
+    wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) load(userptr, "wglGetExtensionsStringEXT");
+    if(wglGetExtensionsStringARB == NULL && wglGetExtensionsStringEXT == NULL) return 0;
+    version = sf_glad_wgl_find_core_wgl();
+
+
+    if (!sf_glad_wgl_find_extensions_wgl(hdc)) return 0;
+    sf_glad_wgl_load_WGL_ARB_create_context(load, userptr);
+    sf_glad_wgl_load_WGL_ARB_extensions_string(load, userptr);
+    sf_glad_wgl_load_WGL_ARB_pbuffer(load, userptr);
+    sf_glad_wgl_load_WGL_ARB_pixel_format(load, userptr);
+    sf_glad_wgl_load_WGL_EXT_extensions_string(load, userptr);
+    sf_glad_wgl_load_WGL_EXT_swap_control(load, userptr);
+
+    return version;
+}
+
+static int gladLoadWGL(HDC hdc, GLADloadfunc load) {
+    return gladLoadWGLUserPtr(hdc, sf_glad_wgl_get_proc_from_userptr, GLAD_GNUC_EXTENSION (void*) load);
+}
+ 
+
+#ifdef SF_GLAD_WGL
+
+static int gladLoaderLoadWGL(HDC hdc) {
+    return gladLoadWGLUserPtr(hdc, sf_glad_wgl_get_proc_from_userptr, GLAD_GNUC_EXTENSION (void*) wglGetProcAddress);
+}
+
+
+#endif /* SF_GLAD_WGL */
+
+#endif /* SF_GLAD_WGL_IMPLEMENTATION */
+

src/SFML/Graphics/CMakeLists.txt

@@ -49,10 +49,6 @@ set(SRC
     ${SRCROOT}/Vertex.cpp
     ${INCROOT}/Vertex.hpp
 )
-if(NOT SFML_OPENGL_ES)
-    list(APPEND SRC ${SRCROOT}/GLLoader.cpp)
-    list(APPEND SRC ${SRCROOT}/GLLoader.hpp)
-endif()
 source_group("" FILES ${SRC})
 
 # drawables sources
@@ -99,6 +95,9 @@ target_link_libraries(sfml-graphics PUBLIC sfml-window)
 # stb_image sources
 target_include_directories(sfml-graphics PRIVATE "${PROJECT_SOURCE_DIR}/extlibs/headers/stb_image")
 
+# glad sources
+target_include_directories(sfml-graphics PRIVATE "${PROJECT_SOURCE_DIR}/extlibs/headers/glad/include")
+
 # let CMake know about our additional graphics libraries paths
 if(SFML_OS_WINDOWS)
     set(CMAKE_INCLUDE_PATH ${CMAKE_INCLUDE_PATH} "${PROJECT_SOURCE_DIR}/extlibs/headers/freetype2")
@@ -112,26 +111,8 @@ elseif(SFML_OS_ANDROID)
 endif()
 
 # find external libraries
-if(SFML_OPENGL_ES)
-    if(SFML_OS_LINUX)
-        sfml_find_package(EGL INCLUDE "EGL_INCLUDE_DIR" LINK "EGL_LIBRARY")
-        sfml_find_package(GLES INCLUDE "GLES_INCLUDE_DIR" LINK "GLES_LIBRARY")
-        target_link_libraries(sfml-graphics PRIVATE EGL GLES)
-    elseif(SFML_OS_IOS)
-        target_link_libraries(sfml-graphics PRIVATE "-framework OpenGLES")
-    endif()
-else()
-    # Target OpenGL already defined for Window component so no sfml_find_package() here
-    target_link_libraries(sfml-graphics PRIVATE OpenGL)
-
-    if(SFML_OS_LINUX)
-        # Target X11 already defined for Window component so no sfml_find_package() here
-        target_link_libraries(sfml-graphics PRIVATE X11)
-    endif()
-endif()
-
 if(SFML_OS_ANDROID)
-    target_link_libraries(sfml-graphics PRIVATE z EGL GLESv1_CM)
+    target_link_libraries(sfml-graphics PRIVATE z)
 elseif(SFML_OS_IOS)
     target_link_libraries(sfml-graphics PRIVATE z bz2)
 endif()

src/SFML/Graphics/GLExtensions.cpp

@@ -25,6 +25,7 @@
 ////////////////////////////////////////////////////////////
 // Headers
 ////////////////////////////////////////////////////////////
+#define SF_GLAD_GL_IMPLEMENTATION
 #include <SFML/Graphics/GLExtensions.hpp>
 #include <SFML/Window/Context.hpp>
 #include <SFML/System/Err.hpp>
@@ -45,13 +46,16 @@ namespace priv
 ////////////////////////////////////////////////////////////
 void ensureExtensionsInit()
 {
-#if !defined(SFML_OPENGL_ES)
     static bool initialized = false;
     if (!initialized)
     {
         initialized = true;
 
-        sfogl_LoadFunctions();
+#ifdef SFML_OPENGL_ES
+        gladLoadGLES1(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#else
+        gladLoadGL(reinterpret_cast<GLADloadfunc>(sf::Context::getFunction));
+#endif
 
         // Retrieve the context version number
         int majorVersion = 0;
@@ -85,7 +89,6 @@ void ensureExtensionsInit()
             err() << "Ensure that hardware acceleration is enabled if available" << std::endl;
         }
     }
-#endif
 }
 
 } // namespace priv

src/SFML/Graphics/GLExtensions.hpp

@@ -29,11 +29,10 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Config.hpp>
+#include <glad/gl.h>
 
 #ifdef SFML_OPENGL_ES
 
-    #include <SFML/OpenGL.hpp>
-
     // SFML requires at a bare minimum OpenGL ES 1.0 capability
     // Some extensions only incorporated by 2.0 are also required
     // OpenGL ES 1.0 is defined relative to OpenGL 1.3
@@ -73,7 +72,7 @@
     // The following extensions are required.
 
     // Core since 2.0 - OES_blend_subtract
-    #define GLEXT_blend_subtract                      GL_OES_blend_subtract
+    #define GLEXT_blend_subtract                      SF_GLAD_GL_OES_blend_subtract
     #define GLEXT_glBlendEquation                     glBlendEquationOES
     #define GLEXT_GL_FUNC_ADD                         GL_FUNC_ADD_OES
     #define GLEXT_GL_FUNC_SUBTRACT                    GL_FUNC_SUBTRACT_OES
@@ -82,28 +81,18 @@
     // The following extensions are optional.
 
     // Core since 2.0 - OES_blend_func_separate
-    #ifdef SFML_SYSTEM_ANDROID
+    #define GLEXT_blend_func_separate                 SF_GLAD_GL_OES_blend_func_separate
-        // Hack to make transparency working on some Android devices
-        #define GLEXT_blend_func_separate                 false
-    #else
-        #define GLEXT_blend_func_separate                 GL_OES_blend_func_separate
-    #endif
     #define GLEXT_glBlendFuncSeparate                 glBlendFuncSeparateOES
 
     // Core since 2.0 - OES_blend_equation_separate
-    #ifdef SFML_SYSTEM_ANDROID
+    #define GLEXT_blend_equation_separate             SF_GLAD_GL_OES_blend_equation_separate
-        // Hack to make transparency working on some Android devices
-        #define GLEXT_blend_equation_separate             false
-    #else
-        #define GLEXT_blend_equation_separate             GL_OES_blend_equation_separate
-    #endif
     #define GLEXT_glBlendEquationSeparate             glBlendEquationSeparateOES
 
     // Core since 2.0 - OES_texture_npot
     #define GLEXT_texture_non_power_of_two            false
 
     // Core since 2.0 - OES_framebuffer_object
-    #define GLEXT_framebuffer_object                  GL_OES_framebuffer_object
+    #define GLEXT_framebuffer_object                  SF_GLAD_GL_OES_framebuffer_object
     #define GLEXT_glBindRenderbuffer                  glBindRenderbufferOES
     #define GLEXT_glDeleteRenderbuffers               glDeleteRenderbuffersOES
     #define GLEXT_glGenRenderbuffers                  glGenRenderbuffersOES
@@ -125,30 +114,34 @@
     #define GLEXT_GL_INVALID_FRAMEBUFFER_OPERATION    GL_INVALID_FRAMEBUFFER_OPERATION_OES
 
     // Core since 3.0
-    #define GLEXT_packed_depth_stencil                false
+    #define GLEXT_packed_depth_stencil                SF_GLAD_GL_OES_packed_depth_stencil
+    #define GLEXT_GL_DEPTH24_STENCIL8                 GL_DEPTH24_STENCIL8_OES
 
     // Core since 3.0
     #define GLEXT_framebuffer_blit                    false
+    #define GLEXT_glBlitFramebuffer                   glBlitFramebufferEXT // Placeholder to satisfy the compiler, entry point is not loaded in GLES
+    #define GLEXT_GL_READ_FRAMEBUFFER                 0
+    #define GLEXT_GL_DRAW_FRAMEBUFFER                 0
+    #define GLEXT_GL_DRAW_FRAMEBUFFER_BINDING         0
+    #define GLEXT_GL_READ_FRAMEBUFFER_BINDING         0
 
     // Core since 3.0
     #define GLEXT_framebuffer_multisample             false
+    #define GLEXT_glRenderbufferStorageMultisample    glRenderbufferStorageMultisampleEXT // Placeholder to satisfy the compiler, entry point is not loaded in GLES
+    #define GLEXT_GL_MAX_SAMPLES                      0
 
     // Core since 3.0 - NV_copy_buffer
     #define GLEXT_copy_buffer                         false
+    #define GLEXT_GL_COPY_READ_BUFFER                 0
+    #define GLEXT_GL_COPY_WRITE_BUFFER                0
+    #define GLEXT_glCopyBufferSubData                 glCopyBufferSubData // Placeholder to satisfy the compiler, entry point is not loaded in GLES
 
     // Core since 3.0 - EXT_sRGB
-    #ifdef GL_EXT_sRGB
+    #define GLEXT_texture_sRGB                        false
-        #define GLEXT_texture_sRGB                        GL_EXT_sRGB
+    #define GLEXT_GL_SRGB8_ALPHA8                     0
-        #define GLEXT_GL_SRGB8_ALPHA8                     GL_SRGB8_ALPHA8_EXT
-    #else
-        #define GLEXT_texture_sRGB                        false
-        #define GLEXT_GL_SRGB8_ALPHA8                     0
-    #endif
 
 #else
 
-    #include <SFML/Graphics/GLLoader.hpp>
-
     // SFML requires at a bare minimum OpenGL 1.1 capability
     // All functionality beyond that is optional
     // and has to be checked for prior to use
@@ -163,35 +156,32 @@
 
     // The following extensions are optional.
 
-    // Core since 1.2 - SGIS_texture_edge_clamp
+    // Core since 1.2 - SGIS_texture_edge_clamp / EXT_texture_edge_clamp
-    #define GLEXT_texture_edge_clamp                  sfogl_ext_SGIS_texture_edge_clamp
+    #define GLEXT_texture_edge_clamp                  SF_GLAD_GL_SGIS_texture_edge_clamp
     #define GLEXT_GL_CLAMP_TO_EDGE                    GL_CLAMP_TO_EDGE_SGIS
 
-    // Core since 1.2 - EXT_texture_edge_clamp
-    #define GLEXT_EXT_texture_edge_clamp              sfogl_ext_EXT_texture_edge_clamp
-
     // Core since 1.2 - EXT_blend_minmax
-    #define GLEXT_blend_minmax                        sfogl_ext_EXT_blend_minmax
+    #define GLEXT_blend_minmax                        SF_GLAD_GL_EXT_blend_minmax
     #define GLEXT_glBlendEquation                     glBlendEquationEXT
     #define GLEXT_GL_FUNC_ADD                         GL_FUNC_ADD_EXT
 
     // Core since 1.2 - EXT_blend_subtract
-    #define GLEXT_blend_subtract                      sfogl_ext_EXT_blend_subtract
+    #define GLEXT_blend_subtract                      SF_GLAD_GL_EXT_blend_subtract
     #define GLEXT_GL_FUNC_SUBTRACT                    GL_FUNC_SUBTRACT_EXT
     #define GLEXT_GL_FUNC_REVERSE_SUBTRACT            GL_FUNC_REVERSE_SUBTRACT_EXT
 
     // Core since 1.3 - ARB_multitexture
-    #define GLEXT_multitexture                        sfogl_ext_ARB_multitexture
+    #define GLEXT_multitexture                        SF_GLAD_GL_ARB_multitexture
     #define GLEXT_glClientActiveTexture               glClientActiveTextureARB
     #define GLEXT_glActiveTexture                     glActiveTextureARB
     #define GLEXT_GL_TEXTURE0                         GL_TEXTURE0_ARB
 
     // Core since 1.4 - EXT_blend_func_separate
-    #define GLEXT_blend_func_separate                 sfogl_ext_EXT_blend_func_separate
+    #define GLEXT_blend_func_separate                 SF_GLAD_GL_EXT_blend_func_separate
     #define GLEXT_glBlendFuncSeparate                 glBlendFuncSeparateEXT
 
     // Core since 1.5 - ARB_vertex_buffer_object
-    #define GLEXT_vertex_buffer_object                sfogl_ext_ARB_vertex_buffer_object
+    #define GLEXT_vertex_buffer_object                SF_GLAD_GL_ARB_vertex_buffer_object
     #define GLEXT_GL_ARRAY_BUFFER                     GL_ARRAY_BUFFER_ARB
     #define GLEXT_GL_DYNAMIC_DRAW                     GL_DYNAMIC_DRAW_ARB
     #define GLEXT_GL_READ_ONLY                        GL_READ_ONLY_ARB
@@ -207,10 +197,10 @@
     #define GLEXT_glUnmapBuffer                       glUnmapBufferARB
 
     // Core since 2.0 - ARB_shading_language_100
-    #define GLEXT_shading_language_100                sfogl_ext_ARB_shading_language_100
+    #define GLEXT_shading_language_100                SF_GLAD_GL_ARB_shading_language_100
 
     // Core since 2.0 - ARB_shader_objects
-    #define GLEXT_shader_objects                      sfogl_ext_ARB_shader_objects
+    #define GLEXT_shader_objects                      SF_GLAD_GL_ARB_shader_objects
     #define GLEXT_glDeleteObject                      glDeleteObjectARB
     #define GLEXT_glGetHandle                         glGetHandleARB
     #define GLEXT_glCreateShaderObject                glCreateShaderObjectARB
@@ -244,27 +234,27 @@
     #define GLEXT_GLhandle                            GLhandleARB
 
     // Core since 2.0 - ARB_vertex_shader
-    #define GLEXT_vertex_shader                       sfogl_ext_ARB_vertex_shader
+    #define GLEXT_vertex_shader                       SF_GLAD_GL_ARB_vertex_shader
     #define GLEXT_GL_VERTEX_SHADER                    GL_VERTEX_SHADER_ARB
     #define GLEXT_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB
 
     // Core since 2.0 - ARB_fragment_shader
-    #define GLEXT_fragment_shader                     sfogl_ext_ARB_fragment_shader
+    #define GLEXT_fragment_shader                     SF_GLAD_GL_ARB_fragment_shader
     #define GLEXT_GL_FRAGMENT_SHADER                  GL_FRAGMENT_SHADER_ARB
 
     // Core since 2.0 - ARB_texture_non_power_of_two
-    #define GLEXT_texture_non_power_of_two            sfogl_ext_ARB_texture_non_power_of_two
+    #define GLEXT_texture_non_power_of_two            SF_GLAD_GL_ARB_texture_non_power_of_two
 
     // Core since 2.0 - EXT_blend_equation_separate
-    #define GLEXT_blend_equation_separate             sfogl_ext_EXT_blend_equation_separate
+    #define GLEXT_blend_equation_separate             SF_GLAD_GL_EXT_blend_equation_separate
     #define GLEXT_glBlendEquationSeparate             glBlendEquationSeparateEXT
 
     // Core since 2.1 - EXT_texture_sRGB
-    #define GLEXT_texture_sRGB                        sfogl_ext_EXT_texture_sRGB
+    #define GLEXT_texture_sRGB                        SF_GLAD_GL_EXT_texture_sRGB
     #define GLEXT_GL_SRGB8_ALPHA8                     GL_SRGB8_ALPHA8_EXT
 
     // Core since 3.0 - EXT_framebuffer_object
-    #define GLEXT_framebuffer_object                  sfogl_ext_EXT_framebuffer_object
+    #define GLEXT_framebuffer_object                  SF_GLAD_GL_EXT_framebuffer_object
     #define GLEXT_glBindRenderbuffer                  glBindRenderbufferEXT
     #define GLEXT_glDeleteRenderbuffers               glDeleteRenderbuffersEXT
     #define GLEXT_glGenRenderbuffers                  glGenRenderbuffersEXT
@@ -286,11 +276,11 @@
     #define GLEXT_GL_STENCIL_ATTACHMENT               GL_STENCIL_ATTACHMENT_EXT
 
     // Core since 3.0 - EXT_packed_depth_stencil
-    #define GLEXT_packed_depth_stencil                sfogl_ext_EXT_packed_depth_stencil
+    #define GLEXT_packed_depth_stencil                SF_GLAD_GL_EXT_packed_depth_stencil
     #define GLEXT_GL_DEPTH24_STENCIL8                 GL_DEPTH24_STENCIL8_EXT
 
     // Core since 3.0 - EXT_framebuffer_blit
-    #define GLEXT_framebuffer_blit                    sfogl_ext_EXT_framebuffer_blit
+    #define GLEXT_framebuffer_blit                    SF_GLAD_GL_EXT_framebuffer_blit
     #define GLEXT_glBlitFramebuffer                   glBlitFramebufferEXT
     #define GLEXT_GL_READ_FRAMEBUFFER                 GL_READ_FRAMEBUFFER_EXT
     #define GLEXT_GL_DRAW_FRAMEBUFFER                 GL_DRAW_FRAMEBUFFER_EXT
@@ -298,18 +288,18 @@
     #define GLEXT_GL_READ_FRAMEBUFFER_BINDING         GL_READ_FRAMEBUFFER_BINDING_EXT
 
     // Core since 3.0 - EXT_framebuffer_multisample
-    #define GLEXT_framebuffer_multisample             sfogl_ext_EXT_framebuffer_multisample
+    #define GLEXT_framebuffer_multisample             SF_GLAD_GL_EXT_framebuffer_multisample
     #define GLEXT_glRenderbufferStorageMultisample    glRenderbufferStorageMultisampleEXT
     #define GLEXT_GL_MAX_SAMPLES                      GL_MAX_SAMPLES_EXT
 
     // Core since 3.1 - ARB_copy_buffer
-    #define GLEXT_copy_buffer                         sfogl_ext_ARB_copy_buffer
+    #define GLEXT_copy_buffer                         SF_GLAD_GL_ARB_copy_buffer
     #define GLEXT_GL_COPY_READ_BUFFER                 GL_COPY_READ_BUFFER
     #define GLEXT_GL_COPY_WRITE_BUFFER                GL_COPY_WRITE_BUFFER
     #define GLEXT_glCopyBufferSubData                 glCopyBufferSubData
 
     // Core since 3.2 - ARB_geometry_shader4
-    #define GLEXT_geometry_shader4                    sfogl_ext_ARB_geometry_shader4
+    #define GLEXT_geometry_shader4                    SF_GLAD_GL_ARB_geometry_shader4
     #define GLEXT_GL_GEOMETRY_SHADER                  GL_GEOMETRY_SHADER_ARB
 
 #endif

src/SFML/Graphics/RenderTarget.cpp

@@ -43,11 +43,11 @@
 
 
 // GL_QUADS is unavailable on OpenGL ES, thus we need to define GL_QUADS ourselves
-#ifdef SFML_OPENGL_ES
+#ifndef GL_QUADS
 
     #define GL_QUADS 0
 
-#endif // SFML_OPENGL_ES
+#endif // GL_QUADS
 
 
 namespace

src/SFML/Graphics/Texture.cpp

@@ -162,7 +162,7 @@ bool Texture::create(unsigned int width, unsigned int height)
     // Make sure that the current texture binding will be preserved
     priv::TextureSaver save;
 
-    static bool textureEdgeClamp = GLEXT_texture_edge_clamp || GLEXT_EXT_texture_edge_clamp;
+    static bool textureEdgeClamp = GLEXT_texture_edge_clamp;
 
     if (!m_isRepeated && !textureEdgeClamp)
     {
@@ -655,7 +655,7 @@ void Texture::setRepeated(bool repeated)
             // Make sure that the current texture binding will be preserved
             priv::TextureSaver save;
 
-            static bool textureEdgeClamp = GLEXT_texture_edge_clamp || GLEXT_EXT_texture_edge_clamp;
+            static bool textureEdgeClamp = GLEXT_texture_edge_clamp;
 
             if (!m_isRepeated && !textureEdgeClamp)
             {

src/SFML/Main/CMakeLists.txt

@@ -16,6 +16,11 @@ endif()
 # define the sfml-main target
 sfml_add_library(sfml-main STATIC SOURCES ${SRC})
 
+if(SFML_OS_ANDROID)
+    # glad sources
+    target_include_directories(sfml-main PRIVATE "${PROJECT_SOURCE_DIR}/extlibs/headers/glad/include")
+endif()
+
 # overwrite sfml-main suffix for backward compatibility with FindSFML.cmake
 set_target_properties(sfml-main PROPERTIES
                       DEBUG_POSTFIX -d

src/SFML/Main/MainAndroid.cpp

@@ -47,6 +47,9 @@
 #include <android/native_activity.h>
 #include <cstring>
 
+#define SF_GLAD_EGL_IMPLEMENTATION
+#include <glad/egl.h>
+
 
 extern int main(int argc, char *argv[]);
 

src/SFML/System/Android/Activity.hpp

@@ -33,7 +33,6 @@
 #include <SFML/System/Mutex.hpp>
 #include <android/native_activity.h>
 #include <android/configuration.h>
-#include <EGL/egl.h>
 #include <vector>
 #include <map>
 #include <string>

src/SFML/System/CMakeLists.txt

@@ -89,6 +89,11 @@ endif()
 sfml_add_library(sfml-system
                  SOURCES ${SRC} ${PLATFORM_SRC})
 
+if(SFML_OS_ANDROID)
+    # glad sources
+    target_include_directories(sfml-system PRIVATE "${PROJECT_SOURCE_DIR}/extlibs/headers/glad/include")
+endif()
+
 # setup dependencies
 if(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_MACOSX)
     target_link_libraries(sfml-system PRIVATE pthread)

src/SFML/Window/CMakeLists.txt

@@ -12,6 +12,10 @@ set(SRC
     ${SRCROOT}/Cursor.cpp
     ${INCROOT}/Cursor.hpp
     ${SRCROOT}/CursorImpl.hpp
+    ${SRCROOT}/EGLCheck.cpp
+    ${SRCROOT}/EGLCheck.hpp
+    ${SRCROOT}/EglContext.cpp
+    ${SRCROOT}/EglContext.hpp
     ${INCROOT}/Export.hpp
     ${SRCROOT}/GlContext.cpp
     ${SRCROOT}/GlContext.hpp
@@ -48,12 +52,6 @@ set(SRC
     ${SRCROOT}/WindowImpl.hpp
     ${INCROOT}/WindowStyle.hpp
 )
-if(SFML_OPENGL_ES AND NOT SFML_OS_IOS)
-    list(APPEND SRC ${SRCROOT}/EGLCheck.cpp)
-    list(APPEND SRC ${SRCROOT}/EGLCheck.hpp)
-    list(APPEND SRC ${SRCROOT}/EglContext.cpp)
-    list(APPEND SRC ${SRCROOT}/EglContext.hpp)
-endif()
 source_group("" FILES ${SRC})
 
 # add platform specific sources
@@ -65,8 +63,6 @@ if(SFML_OS_WINDOWS)
         ${SRCROOT}/Win32/ClipboardImpl.cpp
         ${SRCROOT}/Win32/WglContext.cpp
         ${SRCROOT}/Win32/WglContext.hpp
-        ${SRCROOT}/Win32/WglExtensions.cpp
-        ${SRCROOT}/Win32/WglExtensions.hpp
         ${SRCROOT}/Win32/InputImpl.cpp
         ${SRCROOT}/Win32/InputImpl.hpp
         ${SRCROOT}/Win32/JoystickImpl.cpp
@@ -97,13 +93,11 @@ elseif(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_OPENBSD)
         ${SRCROOT}/Unix/WindowImplX11.cpp
         ${SRCROOT}/Unix/WindowImplX11.hpp
     )
-    if(NOT SFML_OPENGL_ES)
+    if(NOT SFML_OS_ANDROID)
         set(PLATFORM_SRC
             ${PLATFORM_SRC}
             ${SRCROOT}/Unix/GlxContext.cpp
             ${SRCROOT}/Unix/GlxContext.hpp
-            ${SRCROOT}/Unix/GlxExtensions.cpp
-            ${SRCROOT}/Unix/GlxExtensions.hpp
         )
     endif()
     if(SFML_OS_LINUX)
@@ -231,6 +225,9 @@ sfml_add_library(sfml-window
                  SOURCES ${SRC} ${PLATFORM_SRC})
 target_link_libraries(sfml-window PUBLIC sfml-system)
 
+# glad sources
+target_include_directories(sfml-window PRIVATE "${PROJECT_SOURCE_DIR}/extlibs/headers/glad/include")
+
 # When static linking on macOS, we need to add this flag for objective C to work
 if ((NOT BUILD_SHARED_LIBS) AND SFML_OS_MACOSX)
     target_link_libraries(sfml-window PRIVATE -ObjC)
@@ -249,16 +246,20 @@ if ((NOT ${CMAKE_VERSION} VERSION_LESS 3.11) AND (NOT OpenGL_GL_PREFERENCE))
     set(OpenGL_GL_PREFERENCE "LEGACY")
 endif()
 
-if(SFML_OPENGL_ES)
+if(SFML_OS_IOS)
-    if(SFML_OS_IOS)
+    sfml_add_external(GLES LINK "-framework OpenGLES")
-        sfml_add_external(OpenGL LINK "-framework OpenGLES")
+
-    elseif(SFML_OS_ANDROID)
+    target_link_libraries(sfml-window PRIVATE GLES)
-        sfml_add_external(OpenGL LINK "EGL" "GLESv1_CM")
+elseif(SFML_OS_ANDROID)
-    endif()
+    sfml_find_package(GLES INCLUDE "GLES_INCLUDE_DIR" LINK "GLES_LIBRARY")
+    
+    sfml_find_package(EGL INCLUDE "EGL_INCLUDE_DIR" LINK "EGL_LIBRARY")
+    target_link_libraries(sfml-window PRIVATE EGL)
+    target_link_libraries(sfml-window PRIVATE GLES)
 else()
     sfml_find_package(OpenGL INCLUDE "OPENGL_INCLUDE_DIR" LINK "OPENGL_gl_LIBRARY")
+    target_link_libraries(sfml-window PRIVATE OpenGL)
 endif()
-target_link_libraries(sfml-window PRIVATE OpenGL)
 
 if(SFML_OS_WINDOWS AND NOT SFML_COMPILER_MSVC)
     include(CheckIncludeFile)
@@ -268,15 +269,9 @@ if(SFML_OS_WINDOWS AND NOT SFML_COMPILER_MSVC)
     endif()
 endif()
 
-if(SFML_OPENGL_ES AND SFML_OS_LINUX)
-    sfml_find_package(EGL INCLUDE "EGL_INCLUDE_DIR" LINK "EGL_LIBRARY")
-    sfml_find_package(GLES INCLUDE "GLES_INCLUDE_DIR" LINK "GLES_LIBRARY")
-    target_link_libraries(sfml-window PRIVATE EGL GLES)
-endif()
-
 if(SFML_OS_LINUX)
     sfml_find_package(UDev INCLUDE "UDEV_INCLUDE_DIR" LINK "UDEV_LIBRARIES")
-    target_link_libraries(sfml-window PRIVATE UDev)
+    target_link_libraries(sfml-window PRIVATE UDev dl)
 elseif(SFML_OS_WINDOWS)
     target_link_libraries(sfml-window PRIVATE winmm gdi32)
 elseif(SFML_OS_FREEBSD)

src/SFML/Window/EGLCheck.cpp

@@ -28,6 +28,7 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/EGLCheck.hpp>
 #include <SFML/System/Err.hpp>
+#include <glad/egl.h>
 
 
 namespace sf
@@ -35,7 +36,7 @@ namespace sf
 namespace priv
 {
 ////////////////////////////////////////////////////////////
-void eglCheckError(const char* file, unsigned int line)
+void eglCheckError(const char* file, unsigned int line, const char* expression)
 {
     // Obtain information about the success or failure of the most recent EGL
     // function called in the current thread
@@ -152,7 +153,8 @@ void eglCheckError(const char* file, unsigned int line)
         // Log the error
         err() << "An internal EGL call failed in "
               << fileString.substr(fileString.find_last_of("\\/") + 1) << " (" << line << ") : "
-              << error << ", " << description
+            << "\nExpression:\n   " << expression
+            << "\nError description:\n   " << error << "\n   " << description << "\n"
               << std::endl;
     }
 }

src/SFML/Window/EGLCheck.hpp

@@ -29,7 +29,6 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Config.hpp>
-#include <EGL/egl.h>
 #include <string>
 
 
@@ -42,8 +41,9 @@ namespace priv
 ////////////////////////////////////////////////////////////
 #ifdef SFML_DEBUG
 
-    //// In debug mode, perform a test on every EGL call
+    // In debug mode, perform a test on every EGL call
-    #define eglCheck(x) x; sf::priv::eglCheckError(__FILE__, __LINE__);
+    // The do-while loop is needed so that glCheck can be used as a single statement in if/else branches
+    #define eglCheck(expr) do { expr; sf::priv::eglCheckError(__FILE__, __LINE__, #expr); } while (false)
 
 #else
 
@@ -57,9 +57,10 @@ namespace priv
 ///
 /// \param file Source file where the call is located
 /// \param line Line number of the source file where the call is located
+/// \param expression The evaluated expression as a string
 ///
 ////////////////////////////////////////////////////////////
-void eglCheckError(const char* file, unsigned int line);
+void eglCheckError(const char* file, unsigned int line, const char* expression);
 
 } // namespace priv
 } // namespace sf

src/SFML/Window/EglContext.cpp

@@ -28,7 +28,6 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/EglContext.hpp>
 #include <SFML/Window/WindowImpl.hpp>
-#include <SFML/OpenGL.hpp>
 #include <SFML/System/Err.hpp>
 #include <SFML/System/Sleep.hpp>
 #include <SFML/System/Mutex.hpp>
@@ -40,31 +39,50 @@
     #include <X11/Xlib.h>
 #endif
 
+#define SF_GLAD_EGL_IMPLEMENTATION
+#include <glad/egl.h>
+
 namespace
 {
     EGLDisplay getInitializedDisplay()
     {
-#if defined(SFML_SYSTEM_LINUX)
+#if defined(SFML_SYSTEM_ANDROID)
+
+        // On Android, its native activity handles this for us
+        sf::priv::ActivityStates* states = sf::priv::getActivity(NULL);
+        sf::Lock lock(states->mutex);
+
+        return states->display;
+
+#endif
 
         static EGLDisplay display = EGL_NO_DISPLAY;
 
         if (display == EGL_NO_DISPLAY)
         {
-            display = eglCheck(eglGetDisplay(EGL_DEFAULT_DISPLAY));
+            eglCheck(display = eglGetDisplay(EGL_DEFAULT_DISPLAY));
             eglCheck(eglInitialize(display, NULL, NULL));
         }
 
         return display;
+    }
 
-#elif defined(SFML_SYSTEM_ANDROID)
 
-    // On Android, its native activity handles this for us
+    ////////////////////////////////////////////////////////////
-    sf::priv::ActivityStates* states = sf::priv::getActivity(NULL);
+    void ensureInit()
-    sf::Lock lock(states->mutex);
+    {
+        static bool initialized = false;
+        if (!initialized)
+        {
+            initialized = true;
 
-    return states->display;
+            // We don't check the return value since the extension
+            // flags are cleared even if loading fails
+            gladLoaderLoadEGL(EGL_NO_DISPLAY);
 
-#endif
+            // Continue loading with a display
+            gladLoaderLoadEGL(getInitializedDisplay());
+        }
     }
 }
 
@@ -80,6 +98,8 @@ m_context (EGL_NO_CONTEXT),
 m_surface (EGL_NO_SURFACE),
 m_config  (NULL)
 {
+    ensureInit();
+
     // Get the initialized EGL display
     m_display = getInitializedDisplay();
 
@@ -95,7 +115,7 @@ m_config  (NULL)
         EGL_NONE
     };
 
-    m_surface = eglCheck(eglCreatePbufferSurface(m_display, m_config, attrib_list));
+    eglCheck(m_surface = eglCreatePbufferSurface(m_display, m_config, attrib_list));
 
     // Create EGL context
     createContext(shared);
@@ -109,6 +129,8 @@ m_context (EGL_NO_CONTEXT),
 m_surface (EGL_NO_SURFACE),
 m_config  (NULL)
 {
+    ensureInit();
+
 #ifdef SFML_SYSTEM_ANDROID
 
     // On Android, we must save the created context
@@ -144,6 +166,7 @@ m_context (EGL_NO_CONTEXT),
 m_surface (EGL_NO_SURFACE),
 m_config  (NULL)
 {
+    ensureInit();
 }
 
 
@@ -154,7 +177,8 @@ EglContext::~EglContext()
     cleanupUnsharedResources();
 
     // Deactivate the current context
-    EGLContext currentContext = eglCheck(eglGetCurrentContext());
+    EGLContext currentContext = EGL_NO_CONTEXT;
+    eglCheck(currentContext = eglGetCurrentContext());
 
     if (currentContext == m_context)
     {
@@ -175,13 +199,33 @@ EglContext::~EglContext()
 }
 
 
+////////////////////////////////////////////////////////////
+GlFunctionPointer EglContext::getFunction(const char* name)
+{
+    ensureInit();
+
+    return reinterpret_cast<GlFunctionPointer>(eglGetProcAddress(name));
+}
+
+
 ////////////////////////////////////////////////////////////
 bool EglContext::makeCurrent(bool current)
 {
-    if (current)
+    if (m_surface == EGL_NO_SURFACE)
-        return m_surface != EGL_NO_SURFACE && eglCheck(eglMakeCurrent(m_display, m_surface, m_surface, m_context));
+        return false;
 
-    return m_surface != EGL_NO_SURFACE && eglCheck(eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
+    EGLBoolean result = EGL_FALSE;
+
+    if (current)
+    {
+        eglCheck(result = eglMakeCurrent(m_display, m_surface, m_surface, m_context));
+    }
+    else
+    {
+        eglCheck(result = eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
+    }
+
+    return (result != EGL_FALSE);
 }
 
 
@@ -219,14 +263,14 @@ void EglContext::createContext(EglContext* shared)
         eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 
     // Create EGL context
-    m_context = eglCheck(eglCreateContext(m_display, m_config, toShared, contextVersion));
+    eglCheck(m_context = eglCreateContext(m_display, m_config, toShared, contextVersion));
 }
 
 
 ////////////////////////////////////////////////////////////
 void EglContext::createSurface(EGLNativeWindowType window)
 {
-    m_surface = eglCheck(eglCreateWindowSurface(m_display, m_config, window, NULL));
+    eglCheck(m_surface = eglCreateWindowSurface(m_display, m_config, window, NULL));
 }
 
 
@@ -244,6 +288,8 @@ void EglContext::destroySurface()
 ////////////////////////////////////////////////////////////
 EGLConfig EglContext::getBestConfig(EGLDisplay display, unsigned int bitsPerPixel, const ContextSettings& settings)
 {
+    ensureInit();
+
     // Set our video settings constraint
     const EGLint attributes[] = {
         EGL_BUFFER_SIZE, static_cast<EGLint>(bitsPerPixel),
@@ -271,16 +317,29 @@ EGLConfig EglContext::getBestConfig(EGLDisplay display, unsigned int bitsPerPixe
 ////////////////////////////////////////////////////////////
 void EglContext::updateSettings()
 {
-    EGLint tmp;
+    EGLBoolean result = EGL_FALSE;
+    EGLint tmp = 0;
 
     // Update the internal context settings with the current config
-    eglCheck(eglGetConfigAttrib(m_display, m_config, EGL_DEPTH_SIZE, &tmp));
+    eglCheck(result = eglGetConfigAttrib(m_display, m_config, EGL_DEPTH_SIZE, &tmp));
+
+    if (result == EGL_FALSE)
+        err() << "Failed to retrieve EGL_DEPTH_SIZE" << std::endl;
+
     m_settings.depthBits = tmp;
 
-    eglCheck(eglGetConfigAttrib(m_display, m_config, EGL_STENCIL_SIZE, &tmp));
+    eglCheck(result = eglGetConfigAttrib(m_display, m_config, EGL_STENCIL_SIZE, &tmp));
+
+    if (result == EGL_FALSE)
+        err() << "Failed to retrieve EGL_STENCIL_SIZE" << std::endl;
+
     m_settings.stencilBits = tmp;
 
-    eglCheck(eglGetConfigAttrib(m_display, m_config, EGL_SAMPLES, &tmp));
+    eglCheck(result = eglGetConfigAttrib(m_display, m_config, EGL_SAMPLES, &tmp));
+
+    if (result == EGL_FALSE)
+        err() << "Failed to retrieve EGL_SAMPLES" << std::endl;
+
     m_settings.antialiasingLevel = tmp;
 
     m_settings.majorVersion = 1;
@@ -293,6 +352,8 @@ void EglContext::updateSettings()
 ////////////////////////////////////////////////////////////
 XVisualInfo EglContext::selectBestVisual(::Display* XDisplay, unsigned int bitsPerPixel, const ContextSettings& settings)
 {
+    ensureInit();
+
     // Get the initialized EGL display
     EGLDisplay display = getInitializedDisplay();
 

src/SFML/Window/EglContext.hpp

@@ -32,8 +32,11 @@
 #include <SFML/Window/ContextSettings.hpp>
 #include <SFML/Window/EGLCheck.hpp>
 #include <SFML/Window/GlContext.hpp>
-#include <SFML/OpenGL.hpp>
+#include <SFML/Window/WindowStyle.hpp> // Prevent conflict with macro None from Xlib
-
+#include <glad/egl.h>
+#ifdef SFML_SYSTEM_LINUX
+    #include <X11/Xlib.h>
+#endif
 
 namespace sf
 {
@@ -79,6 +82,16 @@ public:
     ////////////////////////////////////////////////////////////
     ~EglContext();
 
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the address of an OpenGL function
+    ///
+    /// \param name Name of the function to get the address of
+    ///
+    /// \return Address of the OpenGL function, 0 on failure
+    ///
+    ////////////////////////////////////////////////////////////
+    static GlFunctionPointer getFunction(const char* name);
+
     ////////////////////////////////////////////////////////////
     /// \brief Activate the context as the current target
     ///        for rendering

src/SFML/Window/GlContext.cpp

@@ -27,11 +27,12 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/GlContext.hpp>
 #include <SFML/Window/Context.hpp>
+#include <SFML/Window/EglContext.hpp>
 #include <SFML/System/ThreadLocalPtr.hpp>
 #include <SFML/System/Mutex.hpp>
 #include <SFML/System/Lock.hpp>
 #include <SFML/System/Err.hpp>
-#include <SFML/OpenGL.hpp>
+#include <glad/gl.h>
 #include <algorithm>
 #include <vector>
 #include <string>
@@ -42,48 +43,66 @@
 #include <cctype>
 #include <cassert>
 
-#if !defined(SFML_OPENGL_ES)
 
-    #if defined(SFML_SYSTEM_WINDOWS)
+#if defined(SFML_SYSTEM_WINDOWS)
+
+    #if defined(SFML_OPENGL_ES)
+
+        typedef sf::priv::EglContext ContextType;
+
+    #else
 
         #include <SFML/Window/Win32/WglContext.hpp>
         typedef sf::priv::WglContext ContextType;
 
-    #elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD)
+    #endif
+
+#elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD)
+
+    #if defined(SFML_OPENGL_ES)
+
+        typedef sf::priv::EglContext ContextType;
+
+    #else
 
         #include <SFML/Window/Unix/GlxContext.hpp>
         typedef sf::priv::GlxContext ContextType;
 
-    #elif defined(SFML_SYSTEM_MACOS)
-
-        #include <SFML/Window/OSX/SFContext.hpp>
-        typedef sf::priv::SFContext ContextType;
-
     #endif
 
-#else
+#elif defined(SFML_SYSTEM_MACOS)
 
-    #if defined(SFML_SYSTEM_IOS)
+    #include <SFML/Window/OSX/SFContext.hpp>
+    typedef sf::priv::SFContext ContextType;
 
-        #include <SFML/Window/iOS/EaglContext.hpp>
+#elif defined(SFML_SYSTEM_IOS)
-        typedef sf::priv::EaglContext ContextType;
 
-    #else
+    #include <SFML/Window/iOS/EaglContext.hpp>
+    typedef sf::priv::EaglContext ContextType;
 
-        #include <SFML/Window/EglContext.hpp>
+#elif defined(SFML_SYSTEM_ANDROID)
-        typedef sf::priv::EglContext ContextType;
 
-    #endif
+    typedef sf::priv::EglContext ContextType;
 
 #endif
 
 #if defined(SFML_SYSTEM_WINDOWS)
 
+    typedef void (APIENTRY *glEnableFuncType)(GLenum);
+    typedef GLenum (APIENTRY *glGetErrorFuncType)();
+    typedef void (APIENTRY *glGetIntegervFuncType)(GLenum, GLint*);
+    typedef const GLubyte* (APIENTRY *glGetStringFuncType)(GLenum);
     typedef const GLubyte* (APIENTRY *glGetStringiFuncType)(GLenum, GLuint);
+    typedef GLboolean (APIENTRY *glIsEnabledFuncType)(GLenum);
 
 #else
 
+    typedef void (*glEnableFuncType)(GLenum);
+    typedef GLenum (*glGetErrorFuncType)();
+    typedef void (*glGetIntegervFuncType)(GLenum, GLint*);
+    typedef const GLubyte* (*glGetStringFuncType)(GLenum);
     typedef const GLubyte* (*glGetStringiFuncType)(GLenum, GLuint);
+    typedef GLboolean (*glIsEnabledFuncType)(GLenum);
 
 #endif
 
@@ -217,16 +236,23 @@ namespace
     {
         extensions.clear();
 
-        // Check whether a >= 3.0 context is available
+        glGetErrorFuncType glGetErrorFunc = reinterpret_cast<glGetErrorFuncType>(sf::priv::GlContext::getFunction("glGetError"));
-        glGetStringiFuncType glGetStringiFunc = NULL;
+        glGetIntegervFuncType glGetIntegervFunc = reinterpret_cast<glGetIntegervFuncType>(sf::priv::GlContext::getFunction("glGetIntegerv"));
-        glGetStringiFunc = reinterpret_cast<glGetStringiFuncType>(sf::priv::GlContext::getFunction("glGetStringi"));
+        glGetStringFuncType glGetStringFunc = reinterpret_cast<glGetStringFuncType>(sf::priv::GlContext::getFunction("glGetString"));
-        int majorVersion = 0;
-        glGetIntegerv(GL_MAJOR_VERSION, &majorVersion);
 
-        if (glGetError() == GL_INVALID_ENUM || !glGetStringiFunc)
+        if (!glGetErrorFunc || !glGetIntegervFunc || !glGetStringFunc)
+            return;
+
+        // Check whether a >= 3.0 context is available
+        int majorVersion = 0;
+        glGetIntegervFunc(GL_MAJOR_VERSION, &majorVersion);
+
+        glGetStringiFuncType glGetStringiFunc = reinterpret_cast<glGetStringiFuncType>(sf::priv::GlContext::getFunction("glGetStringi"));
+
+        if (glGetErrorFunc() == GL_INVALID_ENUM || !glGetStringiFunc)
         {
             // Try to load the < 3.0 way
-            const char* extensionString = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
+            const char* extensionString = reinterpret_cast<const char*>(glGetStringFunc(GL_EXTENSIONS));
 
             do
             {
@@ -243,7 +269,7 @@ namespace
         {
             // Try to load the >= 3.0 way
             int numExtensions = 0;
-            glGetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
+            glGetIntegervFunc(GL_NUM_EXTENSIONS, &numExtensions);
 
             if (numExtensions)
             {
@@ -517,17 +543,9 @@ bool GlContext::isExtensionAvailable(const char* name)
 ////////////////////////////////////////////////////////////
 GlFunctionPointer GlContext::getFunction(const char* name)
 {
-#if !defined(SFML_OPENGL_ES)
-
     Lock lock(mutex);
 
     return ContextType::getFunction(name);
-
-#else
-
-    return 0;
-
-#endif
 }
 
 
@@ -681,10 +699,22 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
     int minorVersion = 0;
 
     // Try the new way first
-    glGetIntegerv(GL_MAJOR_VERSION, &majorVersion);
+    glGetIntegervFuncType glGetIntegervFunc = reinterpret_cast<glGetIntegervFuncType>(getFunction("glGetIntegerv"));
-    glGetIntegerv(GL_MINOR_VERSION, &minorVersion);
+    glGetErrorFuncType glGetErrorFunc = reinterpret_cast<glGetErrorFuncType>(getFunction("glGetError"));
+    glGetStringFuncType glGetStringFunc = reinterpret_cast<glGetStringFuncType>(getFunction("glGetString"));
+    glEnableFuncType glEnableFunc = reinterpret_cast<glEnableFuncType>(getFunction("glEnable"));
+    glIsEnabledFuncType glIsEnabledFunc = reinterpret_cast<glIsEnabledFuncType>(getFunction("glIsEnabled"));
 
-    if (glGetError() != GL_INVALID_ENUM)
+    if (!glGetIntegervFunc || !glGetErrorFunc || !glGetStringFunc || !glEnableFunc || !glIsEnabledFunc)
+    {
+        err() << "Could not load necessary function to initialize OpenGL context" << std::endl;
+        return;
+    }
+
+    glGetIntegervFunc(GL_MAJOR_VERSION, &majorVersion);
+    glGetIntegervFunc(GL_MINOR_VERSION, &minorVersion);
+
+    if (glGetErrorFunc() != GL_INVALID_ENUM)
     {
         m_settings.majorVersion = static_cast<unsigned int>(majorVersion);
         m_settings.minorVersion = static_cast<unsigned int>(minorVersion);
@@ -697,7 +727,7 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
         m_settings.majorVersion = 1;
         m_settings.minorVersion = 1;
 
-        const char* version = reinterpret_cast<const char*>(glGetString(GL_VERSION));
+        const char* version = reinterpret_cast<const char*>(glGetStringFunc(GL_VERSION));
         if (version)
         {
             // OpenGL ES Common Lite profile: The beginning of the returned string is "OpenGL ES-CL major.minor"
@@ -741,7 +771,7 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
     {
         // Retrieve the context flags
         int flags = 0;
-        glGetIntegerv(GL_CONTEXT_FLAGS, &flags);
+        glGetIntegervFunc(GL_CONTEXT_FLAGS, &flags);
 
         if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
             m_settings.attributeFlags |= ContextSettings::Debug;
@@ -755,7 +785,7 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
             if (glGetStringiFunc)
             {
                 int numExtensions = 0;
-                glGetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
+                glGetIntegervFunc(GL_NUM_EXTENSIONS, &numExtensions);
 
                 for (unsigned int i = 0; i < static_cast<unsigned int>(numExtensions); ++i)
                 {
@@ -773,7 +803,7 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
         {
             // Retrieve the context profile
             int profile = 0;
-            glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &profile);
+            glGetIntegervFunc(GL_CONTEXT_PROFILE_MASK, &profile);
 
             if (profile & GL_CONTEXT_CORE_PROFILE_BIT)
                 m_settings.attributeFlags |= ContextSettings::Core;
@@ -783,7 +813,7 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
     // Enable anti-aliasing if requested by the user and supported
     if ((requestedSettings.antialiasingLevel > 0) && (m_settings.antialiasingLevel > 0))
     {
-        glEnable(GL_MULTISAMPLE);
+        glEnableFunc(GL_MULTISAMPLE);
     }
     else
     {
@@ -793,10 +823,10 @@ void GlContext::initialize(const ContextSettings& requestedSettings)
     // Enable sRGB if requested by the user and supported
     if (requestedSettings.sRgbCapable && m_settings.sRgbCapable)
     {
-        glEnable(GL_FRAMEBUFFER_SRGB);
+        glEnableFunc(GL_FRAMEBUFFER_SRGB);
 
         // Check to see if the enable was successful
-        if (glIsEnabled(GL_FRAMEBUFFER_SRGB) == GL_FALSE)
+        if (glIsEnabledFunc(GL_FRAMEBUFFER_SRGB) == GL_FALSE)
         {
             err() << "Warning: Failed to enable GL_FRAMEBUFFER_SRGB" << std::endl;
             m_settings.sRgbCapable = false;
@@ -814,9 +844,18 @@ void GlContext::checkSettings(const ContextSettings& requestedSettings)
 {
     // Perform checks to inform the user if they are getting a context they might not have expected
 
+    glGetStringFuncType glGetStringFunc = reinterpret_cast<glGetStringFuncType>(getFunction("glGetString"));
+
+    if (!glGetStringFunc)
+    {
+        err() << "Could not load glGetString function" << std::endl;
+
+        return;
+    }
+
     // Detect any known non-accelerated implementations and warn
-    const char* vendorName = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
+    const char* vendorName = reinterpret_cast<const char*>(glGetStringFunc(GL_VENDOR));
-    const char* rendererName = reinterpret_cast<const char*>(glGetString(GL_RENDERER));
+    const char* rendererName = reinterpret_cast<const char*>(glGetStringFunc(GL_RENDERER));
 
     if (vendorName && rendererName)
     {

src/SFML/Window/Unix/GlxContext.cpp

@@ -25,6 +25,7 @@
 ////////////////////////////////////////////////////////////
 // Headers
 ////////////////////////////////////////////////////////////
+#define SF_GLAD_GLX_IMPLEMENTATION
 #include <SFML/Window/Unix/WindowImplX11.hpp> // important to be included first (conflict with None)
 #include <SFML/Window/Unix/GlxContext.hpp>
 #include <SFML/Window/Unix/Display.hpp>
@@ -43,12 +44,31 @@ namespace
     sf::Mutex glxErrorMutex;
     bool glxErrorOccurred = false;
 
+
+    ////////////////////////////////////////////////////////////
+    void ensureExtensionsInit(::Display* display, int screen)
+    {
+        static bool initialized = false;
+        if (!initialized)
+        {
+            initialized = true;
+    
+            // We don't check the return value since the extension
+            // flags are cleared even if loading fails
+            gladLoaderLoadGLX(display, screen);
+
+            gladLoadGLX(display, screen, sf::priv::GlxContext::getFunction);
+        }
+    }
+
+
     int HandleXError(::Display*, XErrorEvent*)
     {
         glxErrorOccurred = true;
         return 0;
     }
 
+
     class GlxErrorHandler
     {
     public:
@@ -79,21 +99,6 @@ namespace sf
 {
 namespace priv
 {
-////////////////////////////////////////////////////////////
-void ensureExtensionsInit(::Display* display, int screen)
-{
-    static bool initialized = false;
-    if (!initialized)
-    {
-        initialized = true;
-
-        // We don't check the return value since the extension
-        // flags are cleared even if loading fails
-        sfglx_LoadFunctions(display, screen);
-    }
-}
-
-
 ////////////////////////////////////////////////////////////
 GlxContext::GlxContext(GlxContext* shared) :
 m_display   (NULL),
@@ -212,7 +217,7 @@ GlxContext::~GlxContext()
 ////////////////////////////////////////////////////////////
 GlFunctionPointer GlxContext::getFunction(const char* name)
 {
-    return reinterpret_cast<GlFunctionPointer>(glXGetProcAddressARB(reinterpret_cast<const GLubyte*>(name)));
+    return reinterpret_cast<GlFunctionPointer>(glXGetProcAddress(reinterpret_cast<const GLubyte*>(name)));
 }
 
 
@@ -281,15 +286,15 @@ void GlxContext::setVerticalSyncEnabled(bool enabled)
     // We use the direct pointer to the MESA entry point instead of the alias
     // because glx.h declares the entry point as an external function
     // which would require us to link in an additional library
-    if (sfglx_ext_EXT_swap_control == sfglx_LOAD_SUCCEEDED)
+    if (SF_GLAD_GLX_EXT_swap_control)
     {
         glXSwapIntervalEXT(m_display, m_pbuffer ? m_pbuffer : m_window, enabled ? 1 : 0);
     }
-    else if (sfglx_ext_MESA_swap_control == sfglx_LOAD_SUCCEEDED)
+    else if (SF_GLAD_GLX_MESA_swap_control)
     {
-        result = sf_ptrc_glXSwapIntervalMESA(enabled ? 1 : 0);
+        result = glXSwapIntervalMESA(enabled ? 1 : 0);
     }
-    else if (sfglx_ext_SGI_swap_control == sfglx_LOAD_SUCCEEDED)
+    else if (SF_GLAD_GLX_SGI_swap_control)
     {
         result = glXSwapIntervalSGI(enabled ? 1 : 0);
     }
@@ -347,7 +352,7 @@ XVisualInfo GlxContext::selectBestVisual(::Display* display, unsigned int bitsPe
             glXGetConfig(display, &visuals[i], GLX_DEPTH_SIZE,   &depth);
             glXGetConfig(display, &visuals[i], GLX_STENCIL_SIZE, &stencil);
 
-            if (sfglx_ext_ARB_multisample == sfglx_LOAD_SUCCEEDED)
+            if (SF_GLAD_GLX_ARB_multisample)
             {
                 glXGetConfig(display, &visuals[i], GLX_SAMPLE_BUFFERS_ARB, &multiSampling);
                 glXGetConfig(display, &visuals[i], GLX_SAMPLES_ARB,        &samples);
@@ -358,7 +363,7 @@ XVisualInfo GlxContext::selectBestVisual(::Display* display, unsigned int bitsPe
                 samples = 0;
             }
 
-            if ((sfglx_ext_EXT_framebuffer_sRGB == sfglx_LOAD_SUCCEEDED) || (sfglx_ext_ARB_framebuffer_sRGB == sfglx_LOAD_SUCCEEDED))
+            if (SF_GLAD_GLX_EXT_framebuffer_sRGB || SF_GLAD_GLX_ARB_framebuffer_sRGB)
             {
                 glXGetConfig(display, &visuals[i], GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB, &sRgb);
             }
@@ -405,7 +410,7 @@ void GlxContext::updateSettingsFromVisualInfo(XVisualInfo* visualInfo)
     glXGetConfig(m_display, visualInfo, GLX_DEPTH_SIZE,   &depth);
     glXGetConfig(m_display, visualInfo, GLX_STENCIL_SIZE, &stencil);
 
-    if (sfglx_ext_ARB_multisample == sfglx_LOAD_SUCCEEDED)
+    if (SF_GLAD_GLX_ARB_multisample)
     {
         glXGetConfig(m_display, visualInfo, GLX_SAMPLE_BUFFERS_ARB, &multiSampling);
         glXGetConfig(m_display, visualInfo, GLX_SAMPLES_ARB,        &samples);
@@ -416,7 +421,7 @@ void GlxContext::updateSettingsFromVisualInfo(XVisualInfo* visualInfo)
         samples = 0;
     }
 
-    if ((sfglx_ext_EXT_framebuffer_sRGB == sfglx_LOAD_SUCCEEDED) || (sfglx_ext_ARB_framebuffer_sRGB == sfglx_LOAD_SUCCEEDED))
+    if (SF_GLAD_GLX_EXT_framebuffer_sRGB || SF_GLAD_GLX_ARB_framebuffer_sRGB)
     {
         glXGetConfig(m_display, visualInfo, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB, &sRgb);
     }
@@ -466,7 +471,7 @@ void GlxContext::createSurface(GlxContext* shared, unsigned int width, unsigned
     XVisualInfo visualInfo = selectBestVisual(m_display, bitsPerPixel, m_settings);
 
     // Check if the shared context already exists and pbuffers are supported
-    if (shared && (sfglx_ext_SGIX_pbuffer == sfglx_LOAD_SUCCEEDED))
+    if (shared && SF_GLAD_GLX_SGIX_pbuffer)
     {
         // There are no GLX versions prior to 1.0
         int major = 0;
@@ -626,7 +631,7 @@ void GlxContext::createContext(GlxContext* shared)
         err() << "Failed to query GLX version, limited to legacy context creation" << std::endl;
 
     // Check if glXCreateContextAttribsARB is available (requires GLX 1.3 or greater)
-    bool hasCreateContextArb = (sfglx_ext_ARB_create_context == sfglx_LOAD_SUCCEEDED) && ((major > 1) || (minor >= 3));
+    bool hasCreateContextArb = SF_GLAD_GLX_ARB_create_context && ((major > 1) || (minor >= 3));
 
     // Create the OpenGL context -- first try using glXCreateContextAttribsARB
     if (hasCreateContextArb)
@@ -674,7 +679,7 @@ void GlxContext::createContext(GlxContext* shared)
             }
 
             // Check if setting the profile is supported
-            if (sfglx_ext_ARB_create_context_profile == sfglx_LOAD_SUCCEEDED)
+            if (SF_GLAD_GLX_ARB_create_context_profile)
             {
                 int profile = (m_settings.attributeFlags & ContextSettings::Core) ? GLX_CONTEXT_CORE_PROFILE_BIT_ARB : GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
                 int debug = (m_settings.attributeFlags & ContextSettings::Debug) ? GLX_CONTEXT_DEBUG_BIT_ARB : 0;

src/SFML/Window/Unix/GlxContext.hpp

@@ -29,7 +29,7 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/GlContext.hpp>
-#include <SFML/Window/Unix/GlxExtensions.hpp>
+#include <glad/glx.h>
 #include <X11/Xlib.h>
 
 

src/SFML/Window/Unix/GlxExtensions.cpp

@@ -1,218 +0,0 @@
-////////////////////////////////////////////////////////////
-//
-// SFML - Simple and Fast Multimedia Library
-// Copyright (C) 2007-2019 Laurent Gomila (laurent@sfml-dev.org)
-//
-// This software is provided 'as-is', without any express or implied warranty.
-// In no event will the authors be held liable for any damages arising from the use of this software.
-//
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it freely,
-// subject to the following restrictions:
-//
-// 1. The origin of this software must not be misrepresented;
-//    you must not claim that you wrote the original software.
-//    If you use this software in a product, an acknowledgment
-//    in the product documentation would be appreciated but is not required.
-//
-// 2. Altered source versions must be plainly marked as such,
-//    and must not be misrepresented as being the original software.
-//
-// 3. This notice may not be removed or altered from any source distribution.
-//
-////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////
-// Headers
-////////////////////////////////////////////////////////////
-#include <SFML/Window/Unix/GlxExtensions.hpp>
-#include <SFML/Window/Context.hpp>
-#include <cstdlib>
-#include <cstring>
-#include <cstddef>
-#include <string>
-
-static sf::GlFunctionPointer IntGetProcAddress(const char* name)
-{
-    return sf::Context::getFunction(name);
-}
-
-int sfglx_ext_EXT_swap_control = sfglx_LOAD_FAILED;
-int sfglx_ext_MESA_swap_control = sfglx_LOAD_FAILED;
-int sfglx_ext_SGI_swap_control = sfglx_LOAD_FAILED;
-int sfglx_ext_EXT_framebuffer_sRGB = sfglx_LOAD_FAILED;
-int sfglx_ext_ARB_framebuffer_sRGB = sfglx_LOAD_FAILED;
-int sfglx_ext_ARB_multisample = sfglx_LOAD_FAILED;
-int sfglx_ext_SGIX_pbuffer = sfglx_LOAD_FAILED;
-int sfglx_ext_ARB_create_context = sfglx_LOAD_FAILED;
-int sfglx_ext_ARB_create_context_profile = sfglx_LOAD_FAILED;
-
-void (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalEXT)(Display*, GLXDrawable, int) = NULL;
-
-static int Load_EXT_swap_control(void)
-{
-    int numFailed = 0;
-    sf_ptrc_glXSwapIntervalEXT = reinterpret_cast<void (CODEGEN_FUNCPTR*)(Display*, GLXDrawable, int)>(IntGetProcAddress("glXSwapIntervalEXT"));
-    if (!sf_ptrc_glXSwapIntervalEXT)
-        numFailed++;
-    return numFailed;
-}
-
-int (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalMESA)(int) = NULL;
-
-static int Load_MESA_swap_control(void)
-{
-    int numFailed = 0;
-    sf_ptrc_glXSwapIntervalMESA = reinterpret_cast<int (CODEGEN_FUNCPTR*)(int)>(IntGetProcAddress("glXSwapIntervalMESA"));
-    if (!sf_ptrc_glXSwapIntervalMESA)
-        numFailed++;
-    return numFailed;
-}
-
-int (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalSGI)(int) = NULL;
-
-static int Load_SGI_swap_control(void)
-{
-    int numFailed = 0;
-    sf_ptrc_glXSwapIntervalSGI = reinterpret_cast<int (CODEGEN_FUNCPTR *)(int)>(IntGetProcAddress("glXSwapIntervalSGI"));
-    if (!sf_ptrc_glXSwapIntervalSGI)
-        numFailed++;
-    return numFailed;
-}
-
-GLXPbufferSGIX (CODEGEN_FUNCPTR *sf_ptrc_glXCreateGLXPbufferSGIX)(Display*, GLXFBConfigSGIX, unsigned int, unsigned int, int*) = NULL;
-void (CODEGEN_FUNCPTR *sf_ptrc_glXDestroyGLXPbufferSGIX)(Display*, GLXPbufferSGIX) = NULL;
-void (CODEGEN_FUNCPTR *sf_ptrc_glXGetSelectedEventSGIX)(Display*, GLXDrawable, unsigned long*) = NULL;
-int (CODEGEN_FUNCPTR *sf_ptrc_glXQueryGLXPbufferSGIX)(Display*, GLXPbufferSGIX, int, unsigned int*) = NULL;
-void (CODEGEN_FUNCPTR *sf_ptrc_glXSelectEventSGIX)(Display*, GLXDrawable, unsigned long) = NULL;
-
-static int Load_SGIX_pbuffer(void)
-{
-    int numFailed = 0;
-    sf_ptrc_glXCreateGLXPbufferSGIX = reinterpret_cast<GLXPbufferSGIX (CODEGEN_FUNCPTR*)(Display*, GLXFBConfigSGIX, unsigned int, unsigned int, int*)>(IntGetProcAddress("glXCreateGLXPbufferSGIX"));
-    if (!sf_ptrc_glXCreateGLXPbufferSGIX)
-        numFailed++;
-    sf_ptrc_glXDestroyGLXPbufferSGIX = reinterpret_cast<void (CODEGEN_FUNCPTR*)(Display*, GLXPbufferSGIX)>(IntGetProcAddress("glXDestroyGLXPbufferSGIX"));
-    if (!sf_ptrc_glXDestroyGLXPbufferSGIX)
-        numFailed++;
-    sf_ptrc_glXGetSelectedEventSGIX = reinterpret_cast<void (CODEGEN_FUNCPTR*)(Display*, GLXDrawable, unsigned long*)>(IntGetProcAddress("glXGetSelectedEventSGIX"));
-    if (!sf_ptrc_glXGetSelectedEventSGIX)
-        numFailed++;
-    sf_ptrc_glXQueryGLXPbufferSGIX = reinterpret_cast<int (CODEGEN_FUNCPTR*)(Display*, GLXPbufferSGIX, int, unsigned int*)>(IntGetProcAddress("glXQueryGLXPbufferSGIX"));
-    if (!sf_ptrc_glXQueryGLXPbufferSGIX)
-        numFailed++;
-    sf_ptrc_glXSelectEventSGIX = reinterpret_cast<void (CODEGEN_FUNCPTR*)(Display*, GLXDrawable, unsigned long)>(IntGetProcAddress("glXSelectEventSGIX"));
-    if (!sf_ptrc_glXSelectEventSGIX)
-        numFailed++;
-    return numFailed;
-}
-
-GLXContext (CODEGEN_FUNCPTR *sf_ptrc_glXCreateContextAttribsARB)(Display*, GLXFBConfig, GLXContext, Bool, const int*) = NULL;
-
-static int Load_ARB_create_context(void)
-{
-    int numFailed = 0;
-    sf_ptrc_glXCreateContextAttribsARB = reinterpret_cast<GLXContext (CODEGEN_FUNCPTR*)(Display*, GLXFBConfig, GLXContext, Bool, const int*)>(IntGetProcAddress("glXCreateContextAttribsARB"));
-    if (!sf_ptrc_glXCreateContextAttribsARB)
-        numFailed++;
-    return numFailed;
-}
-
-typedef int (*PFN_LOADFUNCPOINTERS)(void);
-typedef struct sfglx_StrToExtMap_s
-{
-    const char* extensionName;
-    int* extensionVariable;
-    PFN_LOADFUNCPOINTERS LoadExtension;
-} sfglx_StrToExtMap;
-
-static sfglx_StrToExtMap ExtensionMap[9] = {
-    {"GLX_EXT_swap_control", &sfglx_ext_EXT_swap_control, Load_EXT_swap_control},
-    {"GLX_MESA_swap_control", &sfglx_ext_MESA_swap_control, Load_MESA_swap_control},
-    {"GLX_SGI_swap_control", &sfglx_ext_SGI_swap_control, Load_SGI_swap_control},
-    {"GLX_EXT_framebuffer_sRGB", &sfglx_ext_EXT_framebuffer_sRGB, NULL},
-    {"GLX_ARB_framebuffer_sRGB", &sfglx_ext_ARB_framebuffer_sRGB, NULL},
-    {"GLX_ARB_multisample", &sfglx_ext_ARB_multisample, NULL},
-    {"GLX_SGIX_pbuffer", &sfglx_ext_SGIX_pbuffer, Load_SGIX_pbuffer},
-    {"GLX_ARB_create_context", &sfglx_ext_ARB_create_context, Load_ARB_create_context},
-    {"GLX_ARB_create_context_profile", &sfglx_ext_ARB_create_context_profile, NULL}
-};
-
-static int g_extensionMapSize = 9;
-
-
-static sfglx_StrToExtMap* FindExtEntry(const char* extensionName)
-{
-    sfglx_StrToExtMap* currLoc = ExtensionMap;
-    for (int loop = 0; loop < g_extensionMapSize; ++loop, ++currLoc)
-    {
-        if (std::strcmp(extensionName, currLoc->extensionName) == 0)
-            return currLoc;
-    }
-
-    return NULL;
-}
-
-
-static void ClearExtensionVars(void)
-{
-    sfglx_ext_EXT_swap_control = sfglx_LOAD_FAILED;
-    sfglx_ext_MESA_swap_control = sfglx_LOAD_FAILED;
-    sfglx_ext_SGI_swap_control = sfglx_LOAD_FAILED;
-    sfglx_ext_EXT_framebuffer_sRGB = sfglx_LOAD_FAILED;
-    sfglx_ext_ARB_framebuffer_sRGB = sfglx_LOAD_FAILED;
-    sfglx_ext_ARB_multisample = sfglx_LOAD_FAILED;
-    sfglx_ext_SGIX_pbuffer = sfglx_LOAD_FAILED;
-    sfglx_ext_ARB_create_context = sfglx_LOAD_FAILED;
-    sfglx_ext_ARB_create_context_profile = sfglx_LOAD_FAILED;
-}
-
-
-static void LoadExtByName(const char* extensionName)
-{
-    sfglx_StrToExtMap* entry = NULL;
-    entry = FindExtEntry(extensionName);
-    if (entry)
-    {
-        if (entry->LoadExtension)
-        {
-            int numFailed = entry->LoadExtension();
-            if (numFailed == 0)
-            {
-                *(entry->extensionVariable) = sfglx_LOAD_SUCCEEDED;
-            }
-            else
-            {
-                *(entry->extensionVariable) = sfglx_LOAD_SUCCEEDED + numFailed;
-            }
-        }
-        else
-        {
-            *(entry->extensionVariable) = sfglx_LOAD_SUCCEEDED;
-        }
-    }
-}
-
-
-static void ProcExtsFromExtString(const char* strExtList)
-{
-    do
-    {
-        const char* begin = strExtList;
-
-        while ((*strExtList != ' ') && *strExtList)
-            strExtList++;
-
-        LoadExtByName(std::string(begin, strExtList).c_str());
-    } while (*strExtList++);
-}
-
-
-int sfglx_LoadFunctions(Display* display, int screen)
-{
-    ClearExtensionVars();
-
-
-    ProcExtsFromExtString(reinterpret_cast<const char*>(glXQueryExtensionsString(display, screen)));
-    return sfglx_LOAD_SUCCEEDED;
-}

src/SFML/Window/Unix/GlxExtensions.hpp

@@ -1,251 +0,0 @@
-////////////////////////////////////////////////////////////
-//
-// SFML - Simple and Fast Multimedia Library
-// Copyright (C) 2007-2019 Laurent Gomila (laurent@sfml-dev.org)
-//
-// This software is provided 'as-is', without any express or implied warranty.
-// In no event will the authors be held liable for any damages arising from the use of this software.
-//
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it freely,
-// subject to the following restrictions:
-//
-// 1. The origin of this software must not be misrepresented;
-//    you must not claim that you wrote the original software.
-//    If you use this software in a product, an acknowledgment
-//    in the product documentation would be appreciated but is not required.
-//
-// 2. Altered source versions must be plainly marked as such,
-//    and must not be misrepresented as being the original software.
-//
-// 3. This notice may not be removed or altered from any source distribution.
-//
-////////////////////////////////////////////////////////////
-
-#ifndef SF_POINTER_C_GENERATED_HEADER_GLXWIN_HPP
-#define SF_POINTER_C_GENERATED_HEADER_GLXWIN_HPP
-
-#if defined(__glxext_h_) || defined(__glx_glxext_h_)
-#error Attempt to include glx_exts after including glxext.h
-#endif
-
-#define __glxext_h_
-#define __glx_glxext_h_
-
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include <GL/glx.h>
-#ifdef CODEGEN_FUNCPTR
-#undef CODEGEN_FUNCPTR
-#endif // CODEGEN_FUNCPTR
-#define CODEGEN_FUNCPTR
-
-#ifndef GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-#define GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-typedef unsigned int GLenum;
-typedef unsigned char GLboolean;
-typedef unsigned int GLbitfield;
-typedef signed char GLbyte;
-typedef short GLshort;
-typedef int GLint;
-typedef int GLsizei;
-typedef unsigned char GLubyte;
-typedef unsigned short GLushort;
-typedef unsigned int GLuint;
-typedef float GLfloat;
-typedef float GLclampf;
-typedef double GLdouble;
-typedef double GLclampd;
-#define GLvoid void
-
-#endif // GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-
-#ifndef GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-#define GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-
-#endif // GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-
-#ifndef GLEXT_64_TYPES_DEFINED
-// This code block is duplicated in glext.h, so must be protected
-#define GLEXT_64_TYPES_DEFINED
-// Define int32_t, int64_t, and uint64_t types for UST/MSC
-// (as used in the GLX_OML_sync_control extension).
-#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-#include <inttypes.h>
-#elif defined(__sun__) || defined(__digital__)
-#include <inttypes.h>
-#if defined(__STDC__)
-#if defined(__arch64__) || defined(_LP64)
-typedef long int int64_t;
-typedef unsigned long int uint64_t;
-#else
-typedef long long int int64_t;
-typedef unsigned long long int uint64_t;
-#endif // __arch64__
-#endif // __STDC__
-#elif defined( __VMS ) || defined(__sgi)
-#include <inttypes.h>
-#elif defined(__SCO__) || defined(__USLC__)
-#include <stdint.h>
-#elif defined(__UNIXOS2__) || defined(__SOL64__)
-typedef long int int32_t;
-typedef long long int int64_t;
-typedef unsigned long long int uint64_t;
-#elif defined(_WIN32) && defined(__GNUC__)
-#include <stdint.h>
-#elif defined(_WIN32)
-typedef __int32 int32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-#else
-// Fallback if nothing above works
-#include <inttypes.h>
-#endif
-#endif
-    typedef struct __GLXFBConfigRec *GLXFBConfig;
-    typedef XID GLXContextID;
-    typedef struct __GLXcontextRec *GLXContext;
-    typedef XID GLXPixmap;
-    typedef XID GLXDrawable;
-    typedef XID GLXPbuffer;
-    typedef void (APIENTRY *__GLXextFuncPtr)(void);
-    typedef XID GLXVideoCaptureDeviceNV;
-    typedef unsigned int GLXVideoDeviceNV;
-    typedef XID GLXVideoSourceSGIX;
-    typedef struct __GLXFBConfigRec *GLXFBConfigSGIX;
-    typedef XID GLXPbufferSGIX;
-    typedef struct {
-        char    pipeName[80]; // Should be [GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX]
-        int     networkId;
-} GLXHyperpipeNetworkSGIX;
-    typedef struct {
-        char    pipeName[80]; // Should be [GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX]
-        int     channel;
-        unsigned int participationType;
-        int     timeSlice;
-} GLXHyperpipeConfigSGIX;
-    typedef struct {
-        char pipeName[80]; // Should be [GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX]
-        int srcXOrigin, srcYOrigin, srcWidth, srcHeight;
-        int destXOrigin, destYOrigin, destWidth, destHeight;
-} GLXPipeRect;
-    typedef struct {
-        char pipeName[80]; // Should be [GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX]
-        int XOrigin, YOrigin, maxHeight, maxWidth;
-} GLXPipeRectLimits;
-
-#ifdef __cplusplus
-extern "C" {
-#endif // __cplusplus
-
-extern int sfglx_ext_EXT_swap_control;
-extern int sfglx_ext_MESA_swap_control;
-extern int sfglx_ext_SGI_swap_control;
-extern int sfglx_ext_EXT_framebuffer_sRGB;
-extern int sfglx_ext_ARB_framebuffer_sRGB;
-extern int sfglx_ext_ARB_multisample;
-extern int sfglx_ext_SGIX_pbuffer;
-extern int sfglx_ext_ARB_create_context;
-extern int sfglx_ext_ARB_create_context_profile;
-
-#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
-#define GLX_SWAP_INTERVAL_EXT 0x20F1
-
-#define GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20B2
-
-#define GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20B2
-
-#define GLX_SAMPLES_ARB 100001
-#define GLX_SAMPLE_BUFFERS_ARB 100000
-
-#define GLX_ACCUM_BUFFER_BIT_SGIX 0x00000080
-#define GLX_AUX_BUFFERS_BIT_SGIX 0x00000010
-#define GLX_BACK_LEFT_BUFFER_BIT_SGIX 0x00000004
-#define GLX_BACK_RIGHT_BUFFER_BIT_SGIX 0x00000008
-#define GLX_BUFFER_CLOBBER_MASK_SGIX 0x08000000
-#define GLX_DAMAGED_SGIX 0x8020
-#define GLX_DEPTH_BUFFER_BIT_SGIX 0x00000020
-#define GLX_EVENT_MASK_SGIX 0x801F
-#define GLX_FRONT_LEFT_BUFFER_BIT_SGIX 0x00000001
-#define GLX_FRONT_RIGHT_BUFFER_BIT_SGIX 0x00000002
-#define GLX_HEIGHT_SGIX 0x801E
-#define GLX_LARGEST_PBUFFER_SGIX 0x801C
-#define GLX_MAX_PBUFFER_HEIGHT_SGIX 0x8017
-#define GLX_MAX_PBUFFER_PIXELS_SGIX 0x8018
-#define GLX_MAX_PBUFFER_WIDTH_SGIX 0x8016
-#define GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX 0x801A
-#define GLX_OPTIMAL_PBUFFER_WIDTH_SGIX 0x8019
-#define GLX_PBUFFER_BIT_SGIX 0x00000004
-#define GLX_PBUFFER_SGIX 0x8023
-#define GLX_PRESERVED_CONTENTS_SGIX 0x801B
-#define GLX_SAMPLE_BUFFERS_BIT_SGIX 0x00000100
-#define GLX_SAVED_SGIX 0x8021
-#define GLX_STENCIL_BUFFER_BIT_SGIX 0x00000040
-#define GLX_WIDTH_SGIX 0x801D
-#define GLX_WINDOW_SGIX 0x8022
-
-#define GLX_CONTEXT_DEBUG_BIT_ARB 0x00000001
-#define GLX_CONTEXT_FLAGS_ARB 0x2094
-#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
-#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
-#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
-
-#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
-#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
-#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
-
-#ifndef GLX_EXT_swap_control
-#define GLX_EXT_swap_control 1
-extern void (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalEXT)(Display *, GLXDrawable, int);
-#define glXSwapIntervalEXT sf_ptrc_glXSwapIntervalEXT
-#endif // GLX_EXT_swap_control
-
-// Declare entry point even if GLX header already provides glXSwapIntervalMESA
-// We won't make use of an alias here
-extern int (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalMESA)(int);
-
-#ifndef GLX_SGI_swap_control
-#define GLX_SGI_swap_control 1
-extern int (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalSGI)(int);
-#define glXSwapIntervalSGI sf_ptrc_glXSwapIntervalSGI
-#endif // GLX_SGI_swap_control
-
-#ifndef GLX_SGIX_pbuffer
-#define GLX_SGIX_pbuffer 1
-extern GLXPbufferSGIX (CODEGEN_FUNCPTR *sf_ptrc_glXCreateGLXPbufferSGIX)(Display*, GLXFBConfigSGIX, unsigned int, unsigned int, int*);
-#define glXCreateGLXPbufferSGIX sf_ptrc_glXCreateGLXPbufferSGIX
-extern void (CODEGEN_FUNCPTR *sf_ptrc_glXDestroyGLXPbufferSGIX)(Display*, GLXPbufferSGIX);
-#define glXDestroyGLXPbufferSGIX sf_ptrc_glXDestroyGLXPbufferSGIX
-extern void (CODEGEN_FUNCPTR *sf_ptrc_glXGetSelectedEventSGIX)(Display*, GLXDrawable, unsigned long*);
-#define glXGetSelectedEventSGIX sf_ptrc_glXGetSelectedEventSGIX
-extern int (CODEGEN_FUNCPTR *sf_ptrc_glXQueryGLXPbufferSGIX)(Display*, GLXPbufferSGIX, int, unsigned int*);
-#define glXQueryGLXPbufferSGIX sf_ptrc_glXQueryGLXPbufferSGIX
-extern void (CODEGEN_FUNCPTR *sf_ptrc_glXSelectEventSGIX)(Display*, GLXDrawable, unsigned long);
-#define glXSelectEventSGIX sf_ptrc_glXSelectEventSGIX
-#endif // GLX_SGIX_pbuffer
-
-#ifndef GLX_ARB_create_context
-#define GLX_ARB_create_context 1
-extern GLXContext (CODEGEN_FUNCPTR *sf_ptrc_glXCreateContextAttribsARB)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
-#define glXCreateContextAttribsARB sf_ptrc_glXCreateContextAttribsARB
-#endif // GLX_ARB_create_context
-
-
-enum sfglx_LoadStatus
-{
-    sfglx_LOAD_FAILED = 0,
-    sfglx_LOAD_SUCCEEDED = 1
-};
-
-int sfglx_LoadFunctions(Display *display, int screen);
-
-
-#ifdef __cplusplus
-}
-#endif // __cplusplus
-
-#endif // SF_POINTER_C_GENERATED_HEADER_GLXWIN_HPP

src/SFML/Window/Unix/GlxExtensions.txt

@@ -1,14 +0,0 @@
-// Created with:
-// https://bitbucket.org/KhronosGroup/glloadgen
-// Commit d143d66ac90d538ed06f806188714861b8e8e2f9
-// lua LoadGen.lua -style=pointer_c -spec=glX -indent=space -prefix=sf -extfile=GlxExtensions.txt GlxExtensions
-
-EXT_swap_control
-// MESA_swap_control
-SGI_swap_control
-EXT_framebuffer_sRGB
-ARB_framebuffer_sRGB
-GLX_ARB_multisample
-GLX_SGIX_pbuffer
-GLX_ARB_create_context
-GLX_ARB_create_context_profile

src/SFML/Window/Win32/WglContext.cpp

@@ -25,8 +25,8 @@
 ////////////////////////////////////////////////////////////
 // Headers
 ////////////////////////////////////////////////////////////
+#define SF_GLAD_WGL_IMPLEMENTATION
 #include <SFML/Window/WindowImpl.hpp> // included first to avoid a warning about macro redefinition
-#include <SFML/OpenGL.hpp> // included second to avoid an error in WglExtensions.hpp
 #include <SFML/Window/Win32/WglContext.hpp>
 #include <SFML/System/ThreadLocalPtr.hpp>
 #include <SFML/System/Lock.hpp>
@@ -41,6 +41,34 @@ namespace
     // Some drivers are bugged and don't track the current HDC/HGLRC properly
     // In order to deactivate successfully, we need to track it ourselves as well
     sf::ThreadLocalPtr<sf::priv::WglContext> currentContext(NULL);
+
+
+    ////////////////////////////////////////////////////////////
+    void ensureInit()
+    {
+        static bool initialized = false;
+        if (!initialized)
+        {
+            initialized = true;
+
+            gladLoadWGL(NULL, sf::priv::WglContext::getFunction);
+        }
+    }
+
+
+    ////////////////////////////////////////////////////////////
+    void ensureExtensionsInit(HDC deviceContext)
+    {
+        static bool initialized = false;
+        if (!initialized)
+        {
+            initialized = true;
+
+            // We don't check the return value since the extension
+            // flags are cleared even if loading fails
+            gladLoadWGL(deviceContext, sf::priv::WglContext::getFunction);
+        }
+    }
 }
 
 
@@ -48,21 +76,6 @@ namespace sf
 {
 namespace priv
 {
-////////////////////////////////////////////////////////////
-void ensureExtensionsInit(HDC deviceContext)
-{
-    static bool initialized = false;
-    if (!initialized)
-    {
-        initialized = true;
-
-        // We don't check the return value since the extension
-        // flags are cleared even if loading fails
-        sfwgl_LoadFunctions(deviceContext);
-    }
-}
-
-
 ////////////////////////////////////////////////////////////
 String getErrorString(DWORD errorCode)
 {
@@ -88,6 +101,8 @@ m_deviceContext(NULL),
 m_context      (NULL),
 m_ownsWindow   (false)
 {
+    ensureInit();
+
     // TODO: Delegate to the other constructor in C++11
 
     // Save the creation settings
@@ -109,6 +124,8 @@ m_deviceContext(NULL),
 m_context      (NULL),
 m_ownsWindow   (false)
 {
+    ensureInit();
+
     // Save the creation settings
     m_settings = settings;
 
@@ -128,6 +145,8 @@ m_deviceContext(NULL),
 m_context      (NULL),
 m_ownsWindow   (false)
 {
+    ensureInit();
+
     // Save the creation settings
     m_settings = settings;
 
@@ -235,7 +254,7 @@ void WglContext::setVerticalSyncEnabled(bool enabled)
     // Make sure that extensions are initialized
     ensureExtensionsInit(m_deviceContext);
 
-    if (sfwgl_ext_EXT_swap_control == sfwgl_LOAD_SUCCEEDED)
+    if (SF_GLAD_WGL_EXT_swap_control)
     {
         if (wglSwapIntervalEXT(enabled ? 1 : 0) == FALSE)
             err() << "Setting vertical sync failed: " << getErrorString(GetLastError()).toAnsiString() << std::endl;
@@ -258,9 +277,11 @@ void WglContext::setVerticalSyncEnabled(bool enabled)
 ////////////////////////////////////////////////////////////
 int WglContext::selectBestPixelFormat(HDC deviceContext, unsigned int bitsPerPixel, const ContextSettings& settings, bool pbuffer)
 {
+    ensureInit();
+
     // Let's find a suitable pixel format -- first try with wglChoosePixelFormatARB
     int bestFormat = 0;
-    if (sfwgl_ext_ARB_pixel_format == sfwgl_LOAD_SUCCEEDED)
+    if (SF_GLAD_WGL_ARB_pixel_format)
     {
         // Define the basic attributes we want for our window
         int intAttributes[] =
@@ -306,7 +327,7 @@ int WglContext::selectBestPixelFormat(HDC deviceContext, unsigned int bitsPerPix
                 }
 
                 int sampleValues[2] = {0, 0};
-                if (sfwgl_ext_ARB_multisample == sfwgl_LOAD_SUCCEEDED)
+                if (SF_GLAD_WGL_ARB_multisample)
                 {
                     const int sampleAttributes[] =
                     {
@@ -322,7 +343,7 @@ int WglContext::selectBestPixelFormat(HDC deviceContext, unsigned int bitsPerPix
                 }
 
                 int sRgbCapableValue = 0;
-                if ((sfwgl_ext_ARB_framebuffer_sRGB == sfwgl_LOAD_SUCCEEDED) || (sfwgl_ext_EXT_framebuffer_sRGB == sfwgl_LOAD_SUCCEEDED))
+                if (SF_GLAD_WGL_ARB_framebuffer_sRGB || SF_GLAD_WGL_EXT_framebuffer_sRGB)
                 {
                     const int sRgbCapableAttribute = WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB;
 
@@ -443,7 +464,7 @@ void WglContext::updateSettingsFromPixelFormat()
         return;
     }
 
-    if (sfwgl_ext_ARB_pixel_format == sfwgl_LOAD_SUCCEEDED)
+    if (SF_GLAD_WGL_ARB_pixel_format)
     {
         const int attributes[] = {WGL_DEPTH_BITS_ARB, WGL_STENCIL_BITS_ARB};
         int values[2];
@@ -460,7 +481,7 @@ void WglContext::updateSettingsFromPixelFormat()
             m_settings.stencilBits = actualFormat.cStencilBits;
         }
 
-        if (sfwgl_ext_ARB_multisample == sfwgl_LOAD_SUCCEEDED)
+        if (SF_GLAD_WGL_ARB_multisample)
         {
             const int sampleAttributes[] = {WGL_SAMPLE_BUFFERS_ARB, WGL_SAMPLES_ARB};
             int sampleValues[2];
@@ -480,7 +501,7 @@ void WglContext::updateSettingsFromPixelFormat()
             m_settings.antialiasingLevel = 0;
         }
 
-        if ((sfwgl_ext_ARB_framebuffer_sRGB == sfwgl_LOAD_SUCCEEDED) || (sfwgl_ext_EXT_framebuffer_sRGB == sfwgl_LOAD_SUCCEEDED))
+        if (SF_GLAD_WGL_ARB_framebuffer_sRGB || SF_GLAD_WGL_EXT_framebuffer_sRGB)
         {
             const int sRgbCapableAttribute = WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB;
             int sRgbCapableValue = 0;
@@ -513,7 +534,7 @@ void WglContext::updateSettingsFromPixelFormat()
 void WglContext::createSurface(WglContext* shared, unsigned int width, unsigned int height, unsigned int bitsPerPixel)
 {
     // Check if the shared context already exists and pbuffers are supported
-    if (shared && shared->m_deviceContext && (sfwgl_ext_ARB_pbuffer == sfwgl_LOAD_SUCCEEDED))
+    if (shared && shared->m_deviceContext && SF_GLAD_WGL_ARB_pbuffer)
     {
         int bestFormat = selectBestPixelFormat(shared->m_deviceContext, bitsPerPixel, m_settings, true);
 
@@ -595,7 +616,7 @@ void WglContext::createContext(WglContext* shared)
     // Create the OpenGL context -- first try using wglCreateContextAttribsARB
     while (!m_context && m_settings.majorVersion)
     {
-        if (sfwgl_ext_ARB_create_context == sfwgl_LOAD_SUCCEEDED)
+        if (SF_GLAD_WGL_ARB_create_context)
         {
             std::vector<int> attributes;
 
@@ -609,7 +630,7 @@ void WglContext::createContext(WglContext* shared)
             }
 
             // Check if setting the profile is supported
-            if (sfwgl_ext_ARB_create_context_profile == sfwgl_LOAD_SUCCEEDED)
+            if (SF_GLAD_WGL_ARB_create_context_profile)
             {
                 int profile = (m_settings.attributeFlags & ContextSettings::Core) ? WGL_CONTEXT_CORE_PROFILE_BIT_ARB : WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
                 int debug = (m_settings.attributeFlags & ContextSettings::Debug) ? WGL_CONTEXT_DEBUG_BIT_ARB : 0;

src/SFML/Window/Win32/WglContext.hpp

@@ -29,7 +29,7 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/GlContext.hpp>
-#include <SFML/Window/Win32/WglExtensions.hpp>
+#include <glad/wgl.h>
 
 
 namespace sf

src/SFML/Window/Win32/WglExtensions.cpp

@@ -1,223 +0,0 @@
-////////////////////////////////////////////////////////////
-//
-// SFML - Simple and Fast Multimedia Library
-// Copyright (C) 2007-2019 Laurent Gomila (laurent@sfml-dev.org)
-//
-// This software is provided 'as-is', without any express or implied warranty.
-// In no event will the authors be held liable for any damages arising from the use of this software.
-//
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it freely,
-// subject to the following restrictions:
-//
-// 1. The origin of this software must not be misrepresented;
-//    you must not claim that you wrote the original software.
-//    If you use this software in a product, an acknowledgment
-//    in the product documentation would be appreciated but is not required.
-//
-// 2. Altered source versions must be plainly marked as such,
-//    and must not be misrepresented as being the original software.
-//
-// 3. This notice may not be removed or altered from any source distribution.
-//
-////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////
-// Headers
-////////////////////////////////////////////////////////////
-#include <SFML/Window/Win32/WglExtensions.hpp>
-#include <SFML/Window/Context.hpp>
-#include <cstdlib>
-#include <cstring>
-#include <cstddef>
-#include <string>
-
-static sf::GlFunctionPointer IntGetProcAddress(const char* name)
-{
-    return sf::Context::getFunction(name);
-}
-
-int sfwgl_ext_EXT_swap_control = sfwgl_LOAD_FAILED;
-int sfwgl_ext_EXT_framebuffer_sRGB = sfwgl_LOAD_FAILED;
-int sfwgl_ext_ARB_framebuffer_sRGB = sfwgl_LOAD_FAILED;
-int sfwgl_ext_ARB_multisample = sfwgl_LOAD_FAILED;
-int sfwgl_ext_ARB_pixel_format = sfwgl_LOAD_FAILED;
-int sfwgl_ext_ARB_pbuffer = sfwgl_LOAD_FAILED;
-int sfwgl_ext_ARB_create_context = sfwgl_LOAD_FAILED;
-int sfwgl_ext_ARB_create_context_profile = sfwgl_LOAD_FAILED;
-
-int (CODEGEN_FUNCPTR *sf_ptrc_wglGetSwapIntervalEXT)(void) = NULL;
-BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglSwapIntervalEXT)(int) = NULL;
-
-static int Load_EXT_swap_control(void)
-{
-    int numFailed = 0;
-    sf_ptrc_wglGetSwapIntervalEXT = reinterpret_cast<int (CODEGEN_FUNCPTR*)(void)>(IntGetProcAddress("wglGetSwapIntervalEXT"));
-    if (!sf_ptrc_wglGetSwapIntervalEXT)
-        numFailed++;
-    sf_ptrc_wglSwapIntervalEXT = reinterpret_cast<BOOL (CODEGEN_FUNCPTR*)(int)>(IntGetProcAddress("wglSwapIntervalEXT"));
-    if (!sf_ptrc_wglSwapIntervalEXT)
-        numFailed++;
-    return numFailed;
-}
-
-BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglChoosePixelFormatARB)(HDC, const int*, const FLOAT*, UINT, int*, UINT*) = NULL;
-BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglGetPixelFormatAttribfvARB)(HDC, int, int, UINT, const int*, FLOAT*) = NULL;
-BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglGetPixelFormatAttribivARB)(HDC, int, int, UINT, const int*, int*) = NULL;
-
-static int Load_ARB_pixel_format(void)
-{
-    int numFailed = 0;
-    sf_ptrc_wglChoosePixelFormatARB = reinterpret_cast<BOOL (CODEGEN_FUNCPTR*)(HDC, const int*, const FLOAT*, UINT, int*, UINT*)>(IntGetProcAddress("wglChoosePixelFormatARB"));
-    if (!sf_ptrc_wglChoosePixelFormatARB)
-        numFailed++;
-    sf_ptrc_wglGetPixelFormatAttribfvARB = reinterpret_cast<BOOL (CODEGEN_FUNCPTR *)(HDC, int, int, UINT, const int*, FLOAT*)>(IntGetProcAddress("wglGetPixelFormatAttribfvARB"));
-    if (!sf_ptrc_wglGetPixelFormatAttribfvARB)
-        numFailed++;
-    sf_ptrc_wglGetPixelFormatAttribivARB = reinterpret_cast<BOOL (CODEGEN_FUNCPTR*)(HDC, int, int, UINT, const int*, int*)>(IntGetProcAddress("wglGetPixelFormatAttribivARB"));
-    if (!sf_ptrc_wglGetPixelFormatAttribivARB)
-        numFailed++;
-    return numFailed;
-}
-
-HPBUFFERARB (CODEGEN_FUNCPTR *sf_ptrc_wglCreatePbufferARB)(HDC, int, int, int, const int*) = NULL;
-BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglDestroyPbufferARB)(HPBUFFERARB) = NULL;
-HDC (CODEGEN_FUNCPTR *sf_ptrc_wglGetPbufferDCARB)(HPBUFFERARB) = NULL;
-BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglQueryPbufferARB)(HPBUFFERARB, int, int*) = NULL;
-int (CODEGEN_FUNCPTR *sf_ptrc_wglReleasePbufferDCARB)(HPBUFFERARB, HDC) = NULL;
-
-static int Load_ARB_pbuffer()
-{
-    int numFailed = 0;
-    sf_ptrc_wglCreatePbufferARB = reinterpret_cast<HPBUFFERARB (CODEGEN_FUNCPTR*)(HDC, int, int, int, const int*)>(IntGetProcAddress("wglCreatePbufferARB"));
-    if (!sf_ptrc_wglCreatePbufferARB)
-        numFailed++;
-    sf_ptrc_wglDestroyPbufferARB = reinterpret_cast<BOOL (CODEGEN_FUNCPTR*)(HPBUFFERARB)>(IntGetProcAddress("wglDestroyPbufferARB"));
-    if (!sf_ptrc_wglDestroyPbufferARB)
-        numFailed++;
-    sf_ptrc_wglGetPbufferDCARB = reinterpret_cast<HDC (CODEGEN_FUNCPTR*)(HPBUFFERARB)>(IntGetProcAddress("wglGetPbufferDCARB"));
-    if (!sf_ptrc_wglGetPbufferDCARB)
-        numFailed++;
-    sf_ptrc_wglQueryPbufferARB = reinterpret_cast<BOOL (CODEGEN_FUNCPTR*)(HPBUFFERARB, int, int*)>(IntGetProcAddress("wglQueryPbufferARB"));
-    if (!sf_ptrc_wglQueryPbufferARB)
-        numFailed++;
-    sf_ptrc_wglReleasePbufferDCARB = reinterpret_cast<int (CODEGEN_FUNCPTR*)(HPBUFFERARB, HDC)>(IntGetProcAddress("wglReleasePbufferDCARB"));
-    if (!sf_ptrc_wglReleasePbufferDCARB)
-        numFailed++;
-    return numFailed;
-}
-
-HGLRC (CODEGEN_FUNCPTR *sf_ptrc_wglCreateContextAttribsARB)(HDC, HGLRC, const int*) = NULL;
-
-static int Load_ARB_create_context(void)
-{
-    int numFailed = 0;
-    sf_ptrc_wglCreateContextAttribsARB = reinterpret_cast<HGLRC (CODEGEN_FUNCPTR*)(HDC, HGLRC, const int*)>(IntGetProcAddress("wglCreateContextAttribsARB"));
-    if (!sf_ptrc_wglCreateContextAttribsARB)
-        numFailed++;
-    return numFailed;
-}
-
-
-static const char* (CODEGEN_FUNCPTR *sf_ptrc_wglGetExtensionsStringARB)(HDC) = NULL;
-
-typedef int (*PFN_LOADFUNCPOINTERS)(void);
-typedef struct sfwgl_StrToExtMap_s
-{
-    const char* extensionName;
-    int* extensionVariable;
-    PFN_LOADFUNCPOINTERS LoadExtension;
-} sfwgl_StrToExtMap;
-
-static sfwgl_StrToExtMap ExtensionMap[8] = {
-    {"WGL_EXT_swap_control", &sfwgl_ext_EXT_swap_control, Load_EXT_swap_control},
-    {"WGL_EXT_framebuffer_sRGB", &sfwgl_ext_EXT_framebuffer_sRGB, NULL},
-    {"WGL_ARB_framebuffer_sRGB", &sfwgl_ext_ARB_framebuffer_sRGB, NULL},
-    {"WGL_ARB_multisample", &sfwgl_ext_ARB_multisample, NULL},
-    {"WGL_ARB_pixel_format", &sfwgl_ext_ARB_pixel_format, Load_ARB_pixel_format},
-    {"WGL_ARB_pbuffer", &sfwgl_ext_ARB_pbuffer, Load_ARB_pbuffer},
-    {"WGL_ARB_create_context", &sfwgl_ext_ARB_create_context, Load_ARB_create_context},
-    {"WGL_ARB_create_context_profile", &sfwgl_ext_ARB_create_context_profile, NULL}
-};
-
-static int g_extensionMapSize = 8;
-
-
-static sfwgl_StrToExtMap* FindExtEntry(const char* extensionName)
-{
-    sfwgl_StrToExtMap* currLoc = ExtensionMap;
-    for (int loop = 0; loop < g_extensionMapSize; ++loop, ++currLoc)
-    {
-        if (std::strcmp(extensionName, currLoc->extensionName) == 0)
-            return currLoc;
-    }
-
-    return NULL;
-}
-
-
-static void ClearExtensionVars(void)
-{
-    sfwgl_ext_EXT_swap_control = sfwgl_LOAD_FAILED;
-    sfwgl_ext_EXT_framebuffer_sRGB = sfwgl_LOAD_FAILED;
-    sfwgl_ext_ARB_framebuffer_sRGB = sfwgl_LOAD_FAILED;
-    sfwgl_ext_ARB_multisample = sfwgl_LOAD_FAILED;
-    sfwgl_ext_ARB_pixel_format = sfwgl_LOAD_FAILED;
-    sfwgl_ext_ARB_pbuffer = sfwgl_LOAD_FAILED;
-    sfwgl_ext_ARB_create_context = sfwgl_LOAD_FAILED;
-    sfwgl_ext_ARB_create_context_profile = sfwgl_LOAD_FAILED;
-}
-
-
-static void LoadExtByName(const char* extensionName)
-{
-    sfwgl_StrToExtMap* entry = NULL;
-    entry = FindExtEntry(extensionName);
-    if (entry)
-    {
-        if (entry->LoadExtension)
-        {
-            int numFailed = entry->LoadExtension();
-            if (numFailed == 0)
-            {
-                *(entry->extensionVariable) = sfwgl_LOAD_SUCCEEDED;
-            }
-            else
-            {
-                *(entry->extensionVariable) = sfwgl_LOAD_SUCCEEDED + numFailed;
-            }
-        }
-        else
-        {
-            *(entry->extensionVariable) = sfwgl_LOAD_SUCCEEDED;
-        }
-    }
-}
-
-
-static void ProcExtsFromExtString(const char* strExtList)
-{
-    do
-    {
-        const char* begin = strExtList;
-
-        while ((*strExtList != ' ') && *strExtList)
-            strExtList++;
-
-        LoadExtByName(std::string(begin, strExtList).c_str());
-    } while (*strExtList++);
-}
-
-
-int sfwgl_LoadFunctions(HDC hdc)
-{
-    ClearExtensionVars();
-
-    sf_ptrc_wglGetExtensionsStringARB = reinterpret_cast<const char* (CODEGEN_FUNCPTR*)(HDC)>(IntGetProcAddress("wglGetExtensionsStringARB"));
-    if (!sf_ptrc_wglGetExtensionsStringARB)
-        return sfwgl_LOAD_FAILED;
-
-    ProcExtsFromExtString(reinterpret_cast<const char*>(sf_ptrc_wglGetExtensionsStringARB(hdc)));
-    return sfwgl_LOAD_SUCCEEDED;
-}
-

src/SFML/Window/Win32/WglExtensions.hpp

@@ -1,236 +0,0 @@
-////////////////////////////////////////////////////////////
-//
-// SFML - Simple and Fast Multimedia Library
-// Copyright (C) 2007-2019 Laurent Gomila (laurent@sfml-dev.org)
-//
-// This software is provided 'as-is', without any express or implied warranty.
-// In no event will the authors be held liable for any damages arising from the use of this software.
-//
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it freely,
-// subject to the following restrictions:
-//
-// 1. The origin of this software must not be misrepresented;
-//    you must not claim that you wrote the original software.
-//    If you use this software in a product, an acknowledgment
-//    in the product documentation would be appreciated but is not required.
-//
-// 2. Altered source versions must be plainly marked as such,
-//    and must not be misrepresented as being the original software.
-//
-// 3. This notice may not be removed or altered from any source distribution.
-//
-////////////////////////////////////////////////////////////
-
-#ifndef SF_POINTER_C_GENERATED_HEADER_WINDOWSGL_HPP
-#define SF_POINTER_C_GENERATED_HEADER_WINDOWSGL_HPP
-
-#ifdef __wglext_h_
-#error Attempt to include auto-generated WGL header after wglext.h
-#endif
-
-#define __wglext_h_
-
-#ifndef WIN32_LEAN_AND_MEAN
-    #define WIN32_LEAN_AND_MEAN 1
-#endif
-#ifndef NOMINMAX
-    #define NOMINMAX
-#endif
-#include <windows.h>
-
-#ifdef CODEGEN_FUNCPTR
-#undef CODEGEN_FUNCPTR
-#endif // CODEGEN_FUNCPTR
-#define CODEGEN_FUNCPTR WINAPI
-
-#ifndef GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-#define GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-typedef unsigned int GLenum;
-typedef unsigned char GLboolean;
-typedef unsigned int GLbitfield;
-typedef signed char GLbyte;
-typedef short GLshort;
-typedef int GLint;
-typedef int GLsizei;
-typedef unsigned char GLubyte;
-typedef unsigned short GLushort;
-typedef unsigned int GLuint;
-typedef float GLfloat;
-typedef float GLclampf;
-typedef double GLdouble;
-typedef double GLclampd;
-#define GLvoid void
-
-#endif // GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-
-#ifndef GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-#define GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-
-#endif // GL_LOAD_GEN_BASIC_OPENGL_TYPEDEFS
-
-
-struct _GPU_DEVICE {
-    DWORD  cb;
-    CHAR   DeviceName[32];
-    CHAR   DeviceString[128];
-    DWORD  Flags;
-    RECT   rcVirtualScreen;
-};
-DECLARE_HANDLE(HPBUFFERARB);
-DECLARE_HANDLE(HPBUFFEREXT);
-DECLARE_HANDLE(HVIDEOOUTPUTDEVICENV);
-DECLARE_HANDLE(HPVIDEODEV);
-DECLARE_HANDLE(HGPUNV);
-DECLARE_HANDLE(HVIDEOINPUTDEVICENV);
-typedef struct _GPU_DEVICE *PGPU_DEVICE;
-
-#ifdef __cplusplus
-extern "C" {
-#endif // __cplusplus
-
-extern int sfwgl_ext_EXT_swap_control;
-extern int sfwgl_ext_EXT_framebuffer_sRGB;
-extern int sfwgl_ext_ARB_framebuffer_sRGB;
-extern int sfwgl_ext_ARB_multisample;
-extern int sfwgl_ext_ARB_pixel_format;
-extern int sfwgl_ext_ARB_pbuffer;
-extern int sfwgl_ext_ARB_create_context;
-extern int sfwgl_ext_ARB_create_context_profile;
-
-#define WGL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20A9
-
-#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
-
-#define WGL_SAMPLES_ARB 0x2042
-#define WGL_SAMPLE_BUFFERS_ARB 0x2041
-
-#define WGL_ACCELERATION_ARB 0x2003
-#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
-#define WGL_ACCUM_BITS_ARB 0x201D
-#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
-#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
-#define WGL_ACCUM_RED_BITS_ARB 0x201E
-#define WGL_ALPHA_BITS_ARB 0x201B
-#define WGL_ALPHA_SHIFT_ARB 0x201C
-#define WGL_AUX_BUFFERS_ARB 0x2024
-#define WGL_BLUE_BITS_ARB 0x2019
-#define WGL_BLUE_SHIFT_ARB 0x201A
-#define WGL_COLOR_BITS_ARB 0x2014
-#define WGL_DEPTH_BITS_ARB 0x2022
-#define WGL_DOUBLE_BUFFER_ARB 0x2011
-#define WGL_DRAW_TO_BITMAP_ARB 0x2002
-#define WGL_DRAW_TO_WINDOW_ARB 0x2001
-#define WGL_FULL_ACCELERATION_ARB 0x2027
-#define WGL_GENERIC_ACCELERATION_ARB 0x2026
-#define WGL_GREEN_BITS_ARB 0x2017
-#define WGL_GREEN_SHIFT_ARB 0x2018
-#define WGL_NEED_PALETTE_ARB 0x2004
-#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
-#define WGL_NO_ACCELERATION_ARB 0x2025
-#define WGL_NUMBER_OVERLAYS_ARB 0x2008
-#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
-#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
-#define WGL_PIXEL_TYPE_ARB 0x2013
-#define WGL_RED_BITS_ARB 0x2015
-#define WGL_RED_SHIFT_ARB 0x2017
-#define WGL_SHARE_ACCUM_ARB 0x200E
-#define WGL_SHARE_DEPTH_ARB 0x200C
-#define WGL_SHARE_STENCIL_ARB 0x200D
-#define WGL_STENCIL_BITS_ARB 0x2023
-#define WGL_STEREO_ARB 0x2012
-#define WGL_SUPPORT_GDI_ARB 0x200F
-#define WGL_SUPPORT_OPENGL_ARB 0x2010
-#define WGL_SWAP_COPY_ARB 0x2029
-#define WGL_SWAP_EXCHANGE_ARB 0x2028
-#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
-#define WGL_SWAP_METHOD_ARB 0x2007
-#define WGL_SWAP_UNDEFINED_ARB 0x202A
-#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
-#define WGL_TRANSPARENT_ARB 0x200A
-#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
-#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
-#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
-#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
-#define WGL_TYPE_COLORINDEX_ARB 0x202C
-#define WGL_TYPE_RGBA_ARB 0x202B
-
-#define WGL_DRAW_TO_PBUFFER_ARB 0x202D
-#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030
-#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E
-#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F
-#define WGL_PBUFFER_HEIGHT_ARB 0x2035
-#define WGL_PBUFFER_LARGEST_ARB 0x2033
-#define WGL_PBUFFER_LOST_ARB 0x2036
-#define WGL_PBUFFER_WIDTH_ARB 0x2034
-
-#define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001
-#define WGL_CONTEXT_FLAGS_ARB 0x2094
-#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
-#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
-#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
-#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
-#define WGL_ERROR_INVALID_VERSION_ARB 0x2095
-
-#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
-#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
-#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
-#define WGL_ERROR_INVALID_PROFILE_ARB 0x2096
-
-#ifndef WGL_EXT_swap_control
-#define WGL_EXT_swap_control 1
-extern int (CODEGEN_FUNCPTR *sf_ptrc_wglGetSwapIntervalEXT)(void);
-#define wglGetSwapIntervalEXT sf_ptrc_wglGetSwapIntervalEXT
-extern BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglSwapIntervalEXT)(int);
-#define wglSwapIntervalEXT sf_ptrc_wglSwapIntervalEXT
-#endif // WGL_EXT_swap_control
-
-
-#ifndef WGL_ARB_pixel_format
-#define WGL_ARB_pixel_format 1
-extern BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglChoosePixelFormatARB)(HDC, const int*, const FLOAT*, UINT, int*, UINT*);
-#define wglChoosePixelFormatARB sf_ptrc_wglChoosePixelFormatARB
-extern BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglGetPixelFormatAttribfvARB)(HDC, int, int, UINT, const int*, FLOAT*);
-#define wglGetPixelFormatAttribfvARB sf_ptrc_wglGetPixelFormatAttribfvARB
-extern BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglGetPixelFormatAttribivARB)(HDC, int, int, UINT, const int*, int*);
-#define wglGetPixelFormatAttribivARB sf_ptrc_wglGetPixelFormatAttribivARB
-#endif // WGL_ARB_pixel_format
-
-#ifndef WGL_ARB_pbuffer
-#define WGL_ARB_pbuffer 1
-extern HPBUFFERARB (CODEGEN_FUNCPTR *sf_ptrc_wglCreatePbufferARB)(HDC, int, int, int, const int*);
-#define wglCreatePbufferARB sf_ptrc_wglCreatePbufferARB
-extern BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglDestroyPbufferARB)(HPBUFFERARB);
-#define wglDestroyPbufferARB sf_ptrc_wglDestroyPbufferARB
-extern HDC (CODEGEN_FUNCPTR *sf_ptrc_wglGetPbufferDCARB)(HPBUFFERARB);
-#define wglGetPbufferDCARB sf_ptrc_wglGetPbufferDCARB
-extern BOOL (CODEGEN_FUNCPTR *sf_ptrc_wglQueryPbufferARB)(HPBUFFERARB, int, int*);
-#define wglQueryPbufferARB sf_ptrc_wglQueryPbufferARB
-extern int (CODEGEN_FUNCPTR *sf_ptrc_wglReleasePbufferDCARB)(HPBUFFERARB, HDC);
-#define wglReleasePbufferDCARB sf_ptrc_wglReleasePbufferDCARB
-#endif // WGL_ARB_pbuffer
-
-#ifndef WGL_ARB_create_context
-#define WGL_ARB_create_context 1
-extern HGLRC (CODEGEN_FUNCPTR *sf_ptrc_wglCreateContextAttribsARB)(HDC, HGLRC, const int*);
-#define wglCreateContextAttribsARB sf_ptrc_wglCreateContextAttribsARB
-#endif // WGL_ARB_create_context
-
-
-enum sfwgl_LoadStatus
-{
-    sfwgl_LOAD_FAILED = 0,
-    sfwgl_LOAD_SUCCEEDED = 1
-};
-
-int sfwgl_LoadFunctions(HDC hdc);
-
-
-#ifdef __cplusplus
-}
-#endif // __cplusplus
-
-#endif // SF_POINTER_C_GENERATED_HEADER_WINDOWSGL_HPP

src/SFML/Window/Win32/WglExtensions.txt

@@ -1,13 +0,0 @@
-// Created with:
-// https://bitbucket.org/KhronosGroup/glloadgen
-// Commit d143d66ac90d538ed06f806188714861b8e8e2f9
-// lua LoadGen.lua -style=pointer_c -spec=wgl -indent=space -prefix=sf -extfile=WglExtensions.txt WglExtensions
-
-EXT_swap_control
-EXT_framebuffer_sRGB
-ARB_framebuffer_sRGB
-WGL_ARB_multisample
-WGL_ARB_pixel_format
-WGL_ARB_pbuffer
-WGL_ARB_create_context
-WGL_ARB_create_context_profile

src/SFML/Window/Win32/WindowImplWin32.cpp

@@ -36,7 +36,6 @@
 #define WINVER         0x0501
 #include <SFML/Window/Win32/WindowImplWin32.hpp>
 #include <SFML/Window/WindowStyle.hpp>
-#include <GL/gl.h>
 #include <SFML/System/Err.hpp>
 #include <SFML/System/Utf.hpp>
 // dbt.h is lowercase here, as a cross-compile on linux with mingw-w64

src/SFML/Window/iOS/EaglContext.hpp

@@ -32,7 +32,7 @@
 #include <SFML/Window/iOS/ObjCType.hpp>
 #include <SFML/System/Vector2.hpp>
 #include <SFML/System/Clock.hpp>
-#include <OpenGLES/ES1/gl.h>
+#include <glad/gl.h>
 
 
 SFML_DECLARE_OBJC_CLASS(EAGLContext);
@@ -90,6 +90,16 @@ public:
     ////////////////////////////////////////////////////////////
     ~EaglContext();
 
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the address of an OpenGL function
+    ///
+    /// \param name Name of the function to get the address of
+    ///
+    /// \return Address of the OpenGL function, 0 on failure
+    ///
+    ////////////////////////////////////////////////////////////
+    static GlFunctionPointer getFunction(const char* name);
+
     ////////////////////////////////////////////////////////////
     /// \brief Recreate the render buffers of the context
     ///

src/SFML/Window/iOS/EaglContext.mm

@@ -32,8 +32,44 @@
 #include <SFML/System/Sleep.hpp>
 #include <OpenGLES/EAGL.h>
 #include <OpenGLES/EAGLDrawable.h>
-#include <OpenGLES/ES1/glext.h>
 #include <QuartzCore/CAEAGLLayer.h>
+#include <dlfcn.h>
+
+
+namespace
+{
+    PFNGLBINDFRAMEBUFFEROESPROC            glBindFramebufferOESFunc            = 0;
+    PFNGLBINDRENDERBUFFEROESPROC           glBindRenderbufferOESFunc           = 0;
+    PFNGLCHECKFRAMEBUFFERSTATUSOESPROC     glCheckFramebufferStatusOESFunc     = 0;
+    PFNGLDELETEFRAMEBUFFERSOESPROC         glDeleteFramebuffersOESFunc         = 0;
+    PFNGLDELETERENDERBUFFERSOESPROC        glDeleteRenderbuffersOESFunc        = 0;
+    PFNGLFRAMEBUFFERRENDERBUFFEROESPROC    glFramebufferRenderbufferOESFunc    = 0;
+    PFNGLGENFRAMEBUFFERSOESPROC            glGenFramebuffersOESFunc            = 0;
+    PFNGLGENRENDERBUFFERSOESPROC           glGenRenderbuffersOESFunc           = 0;
+    PFNGLGETRENDERBUFFERPARAMETERIVOESPROC glGetRenderbufferParameterivOESFunc = 0;
+    PFNGLRENDERBUFFERSTORAGEOESPROC        glRenderbufferStorageOESFunc        = 0;
+
+
+    void ensureInit()
+    {
+        static bool initialized = false;
+        if (!initialized)
+        {
+            initialized = true;
+
+            glBindFramebufferOESFunc            = reinterpret_cast<PFNGLBINDFRAMEBUFFEROESPROC>           (sf::priv::EaglContext::getFunction("glBindFramebufferOES"));
+            glBindRenderbufferOESFunc           = reinterpret_cast<PFNGLBINDRENDERBUFFEROESPROC>          (sf::priv::EaglContext::getFunction("glBindRenderbufferOES"));
+            glCheckFramebufferStatusOESFunc     = reinterpret_cast<PFNGLCHECKFRAMEBUFFERSTATUSOESPROC>    (sf::priv::EaglContext::getFunction("glCheckFramebufferStatusOES"));
+            glDeleteFramebuffersOESFunc         = reinterpret_cast<PFNGLDELETEFRAMEBUFFERSOESPROC>        (sf::priv::EaglContext::getFunction("glDeleteFramebuffersOES"));
+            glDeleteRenderbuffersOESFunc        = reinterpret_cast<PFNGLDELETERENDERBUFFERSOESPROC>       (sf::priv::EaglContext::getFunction("glDeleteRenderbuffersOES"));
+            glFramebufferRenderbufferOESFunc    = reinterpret_cast<PFNGLFRAMEBUFFERRENDERBUFFEROESPROC>   (sf::priv::EaglContext::getFunction("glFramebufferRenderbufferOES"));
+            glGenFramebuffersOESFunc            = reinterpret_cast<PFNGLGENFRAMEBUFFERSOESPROC>           (sf::priv::EaglContext::getFunction("glGenFramebuffersOES"));
+            glGenRenderbuffersOESFunc           = reinterpret_cast<PFNGLGENRENDERBUFFERSOESPROC>          (sf::priv::EaglContext::getFunction("glGenRenderbuffersOES"));
+            glGetRenderbufferParameterivOESFunc = reinterpret_cast<PFNGLGETRENDERBUFFERPARAMETERIVOESPROC>(sf::priv::EaglContext::getFunction("glGetRenderbufferParameterivOES"));
+            glRenderbufferStorageOESFunc        = reinterpret_cast<PFNGLRENDERBUFFERSTORAGEOESPROC>       (sf::priv::EaglContext::getFunction("glRenderbufferStorageOES"));
+        }
+    }
+}
 
 
 namespace sf
@@ -49,6 +85,8 @@ m_depthbuffer (0),
 m_vsyncEnabled(false),
 m_clock       ()
 {
+    ensureInit();
+
     // Create the context
     if (shared)
         m_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1 sharegroup:[shared->m_context sharegroup]];
@@ -67,6 +105,8 @@ m_depthbuffer (0),
 m_vsyncEnabled(false),
 m_clock       ()
 {
+    ensureInit();
+
     const WindowImplUIKit* window = static_cast<const WindowImplUIKit*>(owner);
 
     createContext(shared, window, bitsPerPixel, settings);
@@ -83,6 +123,8 @@ m_depthbuffer (0),
 m_vsyncEnabled(false),
 m_clock       ()
 {
+    ensureInit();
+
     // This constructor should never be used by implementation
     err() << "Calling bad EaglContext constructor, please contact your developer :)" << std::endl;
 }
@@ -102,11 +144,11 @@ EaglContext::~EaglContext()
 
         // Destroy the buffers
         if (m_framebuffer)
-            glDeleteFramebuffersOES(1, &m_framebuffer);
+            glDeleteFramebuffersOESFunc(1, &m_framebuffer);
         if (m_colorbuffer)
-            glDeleteRenderbuffersOES(1, &m_colorbuffer);
+            glDeleteRenderbuffersOESFunc(1, &m_colorbuffer);
         if (m_depthbuffer)
-            glDeleteRenderbuffersOES(1, &m_depthbuffer);
+            glDeleteRenderbuffersOESFunc(1, &m_depthbuffer);
 
         // Restore the previous context
         [EAGLContext setCurrentContext:previousContext];
@@ -117,6 +159,21 @@ EaglContext::~EaglContext()
 }
 
 
+////////////////////////////////////////////////////////////
+GlFunctionPointer EaglContext::getFunction(const char* name)
+{
+    static void* module = 0;
+
+    if (!module)
+        module = dlopen("libGLESv1_CM.dylib", RTLD_LAZY | RTLD_LOCAL);
+
+    if (module)
+        return reinterpret_cast<GlFunctionPointer>(dlsym(module, name));
+
+    return 0;
+}
+
+
 ////////////////////////////////////////////////////////////
 void EaglContext::recreateRenderBuffers(SFView* glView)
 {
@@ -125,20 +182,20 @@ void EaglContext::recreateRenderBuffers(SFView* glView)
     [EAGLContext setCurrentContext:m_context];
 
     // Bind the frame buffer
-    glBindFramebufferOES(GL_FRAMEBUFFER_OES, m_framebuffer);
+    glBindFramebufferOESFunc(GL_FRAMEBUFFER_OES, m_framebuffer);
 
     // Destroy previous render-buffers
     if (m_colorbuffer)
-        glDeleteRenderbuffersOES(1, &m_colorbuffer);
+        glDeleteRenderbuffersOESFunc(1, &m_colorbuffer);
     if (m_depthbuffer)
-        glDeleteRenderbuffersOES(1, &m_depthbuffer);
+        glDeleteRenderbuffersOESFunc(1, &m_depthbuffer);
 
     // Create the color buffer
-    glGenRenderbuffersOES(1, &m_colorbuffer);
+    glGenRenderbuffersOESFunc(1, &m_colorbuffer);
-    glBindRenderbufferOES(GL_RENDERBUFFER_OES, m_colorbuffer);
+    glBindRenderbufferOESFunc(GL_RENDERBUFFER_OES, m_colorbuffer);
     if (glView)
         [m_context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:(CAEAGLLayer*)glView.layer];
-    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, m_colorbuffer);
+    glFramebufferRenderbufferOESFunc(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, m_colorbuffer);
 
     // Create a depth buffer if requested
     if (m_settings.depthBits > 0)
@@ -150,20 +207,20 @@ void EaglContext::recreateRenderBuffers(SFView* glView)
 
         // Get the size of the color-buffer (which fits the current size of the GL view)
         GLint width, height;
-        glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &width);
+        glGetRenderbufferParameterivOESFunc(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &width);
-        glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &height);
+        glGetRenderbufferParameterivOESFunc(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &height);
 
         // Create the depth buffer
-        glGenRenderbuffersOES(1, &m_depthbuffer);
+        glGenRenderbuffersOESFunc(1, &m_depthbuffer);
-        glBindRenderbufferOES(GL_RENDERBUFFER_OES, m_depthbuffer);
+        glBindRenderbufferOESFunc(GL_RENDERBUFFER_OES, m_depthbuffer);
-        glRenderbufferStorageOES(GL_RENDERBUFFER_OES, format, width, height);
+        glRenderbufferStorageOESFunc(GL_RENDERBUFFER_OES, format, width, height);
-        glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, m_depthbuffer);
+        glFramebufferRenderbufferOESFunc(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, m_depthbuffer);
         if (m_settings.stencilBits > 0)
-            glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_STENCIL_ATTACHMENT_OES, GL_RENDERBUFFER_OES, m_depthbuffer);
+            glFramebufferRenderbufferOESFunc(GL_FRAMEBUFFER_OES, GL_STENCIL_ATTACHMENT_OES, GL_RENDERBUFFER_OES, m_depthbuffer);
     }
 
     // Make sure that everything's ok
-    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
+    GLenum status = glCheckFramebufferStatusOESFunc(GL_FRAMEBUFFER_OES);
     if (status != GL_FRAMEBUFFER_COMPLETE_OES)
         err() << "Failed to create a valid frame buffer (error code: " << status << ")" << std::endl;
 
@@ -185,7 +242,7 @@ bool EaglContext::makeCurrent(bool current)
 ////////////////////////////////////////////////////////////
 void EaglContext::display()
 {
-    glBindRenderbufferOES(GL_RENDERBUFFER_OES, m_colorbuffer);
+    glBindRenderbufferOESFunc(GL_RENDERBUFFER_OES, m_colorbuffer);
     [m_context presentRenderbuffer:GL_RENDERBUFFER_OES];
 
     // The proper way of doing v-sync on iOS would be to use CADisplayLink
@@ -238,7 +295,7 @@ void EaglContext::createContext(EaglContext* shared,
     makeCurrent(true);
 
     // Create the framebuffer (this is the only allowed drawable on iOS)
-    glGenFramebuffersOES(1, &m_framebuffer);
+    glGenFramebuffersOESFunc(1, &m_framebuffer);
 
     // Create the render buffers
     recreateRenderBuffers(window->getGlView());