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[Revert] (MG_Backend/DirectVulkan): back out the gl_FragCoord default-framebuffer origin fix - correct, but it costs DirectVulkan a large order-dependent slowdown that is not yet root-caused

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swung0x48
2026-08-11 06:30:30 -04:00
parent 543c29bf86
commit 5b6dec2d81
5 changed files with 2 additions and 428 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp
-17
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@@ -2779,14 +2779,6 @@ void main() {
MG_State::pGLContext->GetFramebufferBindingSlot(FramebufferTarget::Draw).GetBoundObject();
if (currentDrawFBO != nullptr && currentDrawFBO->IsDefaultFramebuffer()) {
flags |= ProgramFactory::CompileOptionBit::PositionYFlip;
// gl_FragCoord follows the same rule the default-framebuffer RECTANGLES follow
// (GetDefaultFramebufferRectMapping): flipped for identity/180, left alone under a
// quarter turn, which this renderer converts nothing for. Keeping the two in step
// is the whole point - a fragment's window Y and the viewport that placed it must
// agree on which end of the image they count from.
if (!IsQuarterTurnPreTransform(preTransform)) {
flags |= ProgramFactory::CompileOptionBit::FragCoordYFlip;
}
switch (preTransform) {
case VK_SURFACE_TRANSFORM_ROTATE_90_BIT_KHR:
flags |= ProgramFactory::CompileOptionBit::SurfaceRotate90;
@@ -2941,9 +2933,6 @@ void main() {
m_shaderDrawParametersFeatureEnabled,
m_unformattedFloatStorageImagesEnabled);
MOBILEGL_ASSERT(m_programFactory != nullptr, "ProgramFactory creation failed.");
// The swapchain already exists at this point (Initialize creates it first), so seed the
// height the factory could not be told about from CreateSwapchain.
m_programFactory->SetDefaultFramebufferHeight(m_swapchainObject.GetExtent().height);
// Aging evictions (render passes and program entries) must purge the dependent
// pipeline / compute-pipeline / descriptor-set caches in the same step; both
// sweeps only run from the frame-boundary seams, long after initialization.
@@ -12032,12 +12021,6 @@ void main() {
static_cast<Uint32>(m_physicalDevice.queueFamilies.graphicsFamily),
static_cast<Uint32>(m_physicalDevice.queueFamilies.presentFamily),
m_config.MaxFramesInFlight, desiredExtent);
// The FragCoordYFlip variants bake this height in; it is the only input to a shader
// module that lives outside the GL program, so the factory has to learn it here (and on
// every recreation, which is the only way it can change).
if (m_programFactory) {
m_programFactory->SetDefaultFramebufferHeight(m_swapchainObject.GetExtent().height);
}
}
void VulkanRenderer::CreateCommandPool() {