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- only activate shader storage buffers on modern drivers also supporting GL_ARB_buffer storage. Early adopters of this extension (i.e. older AMD drivers mainly) tend to implement this badly.

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This commit is contained in:
Christoph Oelckers 2014-09-17 09:01:16 +02:00
parent df1364e2d7
commit c773a500f2
1 changed files with 10 additions and 2 deletions
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12
src/gl/system/gl_interface.cpp
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@ -133,8 +133,16 @@ void gl_LoadExtensions()
if (!Args->CheckParm("-gl3"))
{
// don't use GL 4.x features when running in GL 3 emulation mode.
if (CheckExtension("GL_ARB_shader_storage_buffer_object")) gl.flags |= RFL_SHADER_STORAGE_BUFFER;
if (CheckExtension("GL_ARB_buffer_storage")) gl.flags |= RFL_BUFFER_STORAGE;
if (CheckExtension("GL_ARB_buffer_storage"))
{
// work around a problem with older AMD drivers: Their implementation of shader storage buffer objects is piss-poor and does not match uniform buffers even closely.
// Recent drivers, GL 4.4 don't have this problem, these can easily be recognized by also supporting the GL_ARB_buffer_storage extension.
if (CheckExtension("GL_ARB_shader_storage_buffer_object"))
{
gl.flags |= RFL_SHADER_STORAGE_BUFFER;
}
gl.flags |= RFL_BUFFER_STORAGE;
}
}
int v;