Commit adcc3b14 authored by Felix Paul Kühne's avatar Felix Paul Kühne

opengl: fixed playback of 10bit content on Macs with OpenGL 1.4 drivers,...

opengl: fixed playback of 10bit content on Macs with OpenGL 1.4 drivers, notably using the GMA 950 chipset (close #5973)

We do so by forcefully disabling the 16bit shaders, which the chipset pretends to support, but actually doesn't.
parent a26c0ae3
......@@ -130,6 +130,24 @@ static inline int GetAlignedSize(unsigned size)
static bool IsLuminance16Supported(int target)
{
#if defined(MACOS_OPENGL)
/* OpenGL 1.x on OS X does _not_ support 16bit shaders, but pretends to.
* That's why we enforce return false here, even though the actual code below
* would return true.
* This fixes playback of 10bit content on the Intel GMA 950 chipset, which is
* the only "GPU" supported by 10.6 and 10.7 with just an OpenGL 1.4 driver.
*
* Presumely, this also improves playback on the GMA 3100, GeForce FX 5200,
* GeForce4 Ti, GeForce3, GeForce2 MX/4 MX and the Radeon 8500 when
* running OS X 10.5. */
const GLubyte * p_glversion;
float f_glversion;
p_glversion = glGetString (GL_VERSION);
sscanf((char *)p_glversion, "%f", &f_glversion);
if (f_glversion < 2)
return false;
#endif
GLuint texture;
glGenTextures(1, &texture);
......
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