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Minor Antialiasing update for Mac OS X

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This commit is contained in:
Marco Antognini 2011-07-23 13:41:57 +02:00
parent d337a98321
commit acfdc5b8f2
1 changed files with 19 additions and 16 deletions
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35
src/SFML/Window/OSX/SFContext.mm
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@ -32,20 +32,6 @@
#import <SFML/Window/OSX/AutoreleasePoolWrapper.h> #import <SFML/Window/OSX/AutoreleasePoolWrapper.h>
/*
* DISCUSSION :
* ============
*
* [1] (2010_07)
* should AA-related NSOpenGLPixelFormatAttribute not be in the array
* if AA is not enable (settings.AntialiasingLevel == 0) ?
* => will not be present in attributs array if 0.
*
* [2] (2010_07)
* how many buffer should be used for AA ?
* => «1» was choosen.
*/
namespace sf namespace sf
{ {
namespace priv namespace priv
@ -172,14 +158,31 @@ void SFContext::CreateContext(SFContext* shared,
attrs.push_back(NSOpenGLPFAStencilSize); attrs.push_back(NSOpenGLPFAStencilSize);
attrs.push_back((NSOpenGLPixelFormatAttribute)settings.StencilBits); attrs.push_back((NSOpenGLPixelFormatAttribute)settings.StencilBits);
if (settings.AntialiasingLevel > 0) { // [1] if (settings.AntialiasingLevel > 0) {
/*
* Antialiasing techniques are described in the
* "OpenGL Programming Guide for Mac OS X" document.
*
* According to this document, there is currently only one
* supported sample buffer the antialisaing level.
*
* The document also states that software renderers should be avoided
* because antialisaing techniques are very slow with them.
*/
// Prefer multisampling over supersampling
attrs.push_back(NSOpenGLPFAMultisample); attrs.push_back(NSOpenGLPFAMultisample);
// Only one buffer is currently available.
attrs.push_back(NSOpenGLPFASampleBuffers); attrs.push_back(NSOpenGLPFASampleBuffers);
attrs.push_back((NSOpenGLPixelFormatAttribute)1); // [2] attrs.push_back((NSOpenGLPixelFormatAttribute)1);
// Antialiasing level
attrs.push_back(NSOpenGLPFASamples); attrs.push_back(NSOpenGLPFASamples);
attrs.push_back((NSOpenGLPixelFormatAttribute)settings.AntialiasingLevel); attrs.push_back((NSOpenGLPixelFormatAttribute)settings.AntialiasingLevel);
// No software renderer
attrs.push_back(NSOpenGLPFANoRecovery);
} }
attrs.push_back((NSOpenGLPixelFormatAttribute)0); // end of array attrs.push_back((NSOpenGLPixelFormatAttribute)0); // end of array