GLenum Framebuffer::getImplementationColorReadType()
{
Renderbuffer *colorbuffer = mColorbufferPointer;
if(colorbuffer)
{
switch(colorbuffer->getInternalFormat())
{
case sw::FORMAT_A8R8G8B8: return GL_UNSIGNED_BYTE;
case sw::FORMAT_A8B8G8R8: return GL_UNSIGNED_BYTE;
case sw::FORMAT_X8R8G8B8: return GL_UNSIGNED_BYTE;
case sw::FORMAT_X8B8G8R8: return GL_UNSIGNED_BYTE;
case sw::FORMAT_A1R5G5B5: return GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT;
case sw::FORMAT_R5G6B5: return GL_UNSIGNED_SHORT_5_6_5;
default:
UNREACHABLE(colorbuffer->getInternalFormat());
}
}
return GL_UNSIGNED_BYTE;
}
GLenum Framebuffer::getImplementationColorReadFormat()
{
Renderbuffer *colorbuffer = mColorbufferPointer;
if(colorbuffer)
{
// Don't return GL_RGBA since that's always supported. Provide a second option here.
switch(colorbuffer->getInternalFormat())
{
case sw::FORMAT_A8R8G8B8: return GL_BGRA_EXT;
case sw::FORMAT_A8B8G8R8: return GL_BGRA_EXT;
case sw::FORMAT_X8R8G8B8: return 0x80E0; // GL_BGR_EXT
case sw::FORMAT_X8B8G8R8: return 0x80E0; // GL_BGR_EXT
case sw::FORMAT_A1R5G5B5: return GL_BGRA_EXT;
case sw::FORMAT_R5G6B5: return 0x80E0; // GL_BGR_EXT
default:
UNREACHABLE(colorbuffer->getInternalFormat());
}
}
return GL_RGBA;
}