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Discard blit buffer contents before blit.

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This way the GPU doesn't think it needs to load anything, it's all being
overwritten.  If we're only using part of the framebuffer, the other parts
don't matter.
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2016-01-04 20:57:54 -08:00
parent a6c64f74d1
commit 4e088aebb7
1 changed files with 9 additions and 11 deletions
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GPU/GLES/Framebuffer.cpp
+9 -11
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@@ -1274,18 +1274,16 @@ bool FramebufferManager::CreateDownloadTempBuffer(VirtualFramebuffer *nvfb) {
}
void FramebufferManager::UpdateDownloadTempBuffer(VirtualFramebuffer *nvfb) {
if (gl_extensions.IsGLES) {
if (nvfb->fbo) {
fbo_bind_as_render_target(nvfb->fbo);
}
_assert_msg_(G3D, nvfb->fbo, "Expecting a valid nvfb in UpdateDownloadTempBuffer");
// Some tiled mobile GPUs benefit IMMENSELY from clearing an FBO before rendering
// to it. This broke stuff before, so now it only clears on the first use of an
// FBO in a frame. This means that some games won't be able to avoid the on-some-GPUs
// performance-crushing framebuffer reloads from RAM, but we'll have to live with that.
if (nvfb->last_frame_render != gpuStats.numFlips) {
ClearBuffer();
}
// Discard the previous contents of this buffer where possible.
if (gl_extensions.GLES3 && glInvalidateFramebuffer != nullptr) {
fbo_bind_as_render_target(nvfb->fbo);
GLenum attachments[3] = { GL_COLOR_ATTACHMENT0, GL_STENCIL_ATTACHMENT, GL_DEPTH_ATTACHMENT };
glInvalidateFramebuffer(GL_FRAMEBUFFER, 3, attachments);
} else if (gl_extensions.IsGLES) {
fbo_bind_as_render_target(nvfb->fbo);
ClearBuffer();
}
}