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