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Support getting/setting kCGLCPSwapInterval
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src/OpenGL/OpenGL.c
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src/OpenGL/OpenGL.c
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pthread_mutex_t lock;
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EGLContext egl_context;
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EGLSurface egl_surface;
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// EGL has no function for getting the current swap interval,
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// so we need to save the last set value. The default is 1.
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int swap_interval;
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};
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struct _CGLPixelFormatObj {
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pthread_mutex_init(&(context->lock), NULL);
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context->egl_context = egl_context;
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context->egl_surface = NULL;
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context->swap_interval = 1;
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*resultp = context;
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···
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}
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CGLError CGLSetParameter(CGLContextObj context, CGLContextParameter parameter, const GLint *value) {
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fprintf(stderr, "CGLSetParameter unimplemented\n");
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if (!value)
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return kCGLBadAddress;
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if (parameter == kCGLCPSwapInterval)
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{
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GLint v = *value;
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EGLBoolean success = eglSwapInterval(display, v);
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if (success)
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context->swap_interval = v;
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return success ? kCGLNoError : kCGLBadValue;
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}
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fprintf(stderr, "CGLSetParameter unimplemented for parameter %d\n", parameter);
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return kCGLNoError;
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}
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CGLError CGLGetParameter(CGLContextObj context, CGLContextParameter parameter, GLint *value) {
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fprintf(stderr, "CGLGetParameter unimplemented\n");
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if (!value)
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return kCGLBadAddress;
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if (parameter == kCGLCPSwapInterval)
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{
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*value = context->swap_interval;
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return kCGLNoError;
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}
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fprintf(stderr, "CGLGetParameter unimplemented for parameter %d\n", parameter);
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return kCGLNoError;
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}