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provide GL_ARB_ES2_compatibility workaround

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ES2 is in ogl core since 4.1, but not all drivers support it
This commit is contained in:
degasus 2013-06-25 18:14:41 +02:00
parent 5904ffb21d
commit 21ca344a21
1 changed files with 20 additions and 0 deletions
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20
Source/Plugins/Plugin_VideoOGL/Src/Render.cpp
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@ -255,6 +255,16 @@ void ErrorCallback( GLenum source, GLenum type, GLuint id, GLenum severity, GLsi
#endif #endif
} }
// Two small Fallbacks to avoid GL_ARB_ES2_compatibility
void GLAPIENTRY DepthRangef(GLfloat neardepth, GLfloat fardepth)
{
glDepthRange(neardepth, fardepth);
}
void GLAPIENTRY ClearDepthf(GLfloat depthval)
{
glClearDepth(depthval);
}
void InitDriverInfo() void InitDriverInfo()
{ {
// Get Vendor // Get Vendor
@ -405,6 +415,16 @@ Renderer::Renderer()
if (!GLEW_ARB_texture_non_power_of_two) if (!GLEW_ARB_texture_non_power_of_two)
WARN_LOG(VIDEO, "ARB_texture_non_power_of_two not supported."); WARN_LOG(VIDEO, "ARB_texture_non_power_of_two not supported.");
// OpenGL 3 doesn't provide GLES like float functions for depth.
// They are in core in OpenGL 4.1, so almost every driver should support them.
// But for the oldest ones, we provide fallbacks to the old double functions.
if (!GLEW_ARB_ES2_compatibility)
{
glDepthRangef = DepthRangef;
glClearDepthf = ClearDepthf;
}
if (!bSuccess) if (!bSuccess)
return; // TODO: fail return; // TODO: fail