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OpenGL2: Fix FB-MSAA on AMD Windows driver

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Fix r_ext_framebuffer_multisample > 0 causing the screen to always be
solid black when using AMD Windows driver.

The AMD Windows driver requires binding renderbuffer for it to be valid.
The OpenGL2 renderer uses GL_EXT_direct_state_access that shouldn't
require this. It would be required for Core/GL_ARB_direct_state_access.
It seems like a driver bug.
This commit is contained in:
Zack Middleton 2023-11-20 17:16:32 -06:00 committed by The Turtle Man ♣
parent f7c12a1cf7
commit 03bc4eb810
1 changed files with 5 additions and 1 deletions
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6
code/renderergl2/tr_fbo.c
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@ -170,9 +170,13 @@ void FBO_CreateBuffer(FBO_t *fbo, int format, int index, int multisample)
}
absent = *pRenderBuffer == 0;
if (absent)
if (absent) {
qglGenRenderbuffers(1, pRenderBuffer);
// workaround AMD Windows driver requiring bind to create renderbuffer
GL_BindRenderbuffer(*pRenderBuffer);
}
if (multisample && glRefConfig.framebufferMultisample)
qglNamedRenderbufferStorageMultisampleEXT(*pRenderBuffer, multisample, format, fbo->width, fbo->height);
else