OrdinaryMagician/vkdoom_m
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Clear and InvalidateFramebuffer optimization

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This commit is contained in:
Magnus Norddahl 2016-08-17 17:37:13 +02:00
commit 5eeac830eb
3 changed files with 12 additions and 8 deletions
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14
src/gl/scene/gl_scene.cpp
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@ -174,18 +174,18 @@ void FGLRenderer::Set3DViewport(bool mainview)
mBuffers->BindSceneFB();
}
// Always clear all buffers with scissor test disabled.
// This is faster on newer hardware because it allows the GPU to skip
// reading from slower memory where the full buffers are stored.
glDisable(GL_SCISSOR_TEST);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
const auto &bounds = mSceneViewport;
glViewport(bounds.left, bounds.top, bounds.width, bounds.height);
glScissor(bounds.left, bounds.top, bounds.width, bounds.height);
glEnable(GL_SCISSOR_TEST);
#ifdef _DEBUG
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
#else
glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
#endif
glEnable(GL_MULTISAMPLE);
glEnable(GL_DEPTH_TEST);