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[Optimization] (MG_Backend/DirectVulkan): properly use vkCmdBlitImage() on rotations that

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applicable, rather than shader-based blit
This commit is contained in:
swung0x48
2026-05-24 00:14:05 +08:00
parent 6072b5b703
commit dcfe91bdfc
1 changed files with 34 additions and 5 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp
+34 -5
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@@ -1096,6 +1096,33 @@ void main() {
return BlitSurfaceTransform::Identity;
}
}
static Bool RequiresShaderBlitToDefaultFramebuffer(VkSurfaceTransformFlagBitsKHR preTransform) {
switch (preTransform) {
case VK_SURFACE_TRANSFORM_ROTATE_90_BIT_KHR:
case VK_SURFACE_TRANSFORM_ROTATE_270_BIT_KHR:
return true;
default:
return false;
}
}
static void ApplyNativeBlitDefaultFramebufferTransform(VkSurfaceTransformFlagBitsKHR preTransform,
const BlitImageBinding& dstBinding,
VkImageBlit& blitRegion) {
switch (preTransform) {
case VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR:
blitRegion.dstOffsets[0].y = dstBinding.extent.y() - blitRegion.dstOffsets[0].y;
blitRegion.dstOffsets[1].y = dstBinding.extent.y() - blitRegion.dstOffsets[1].y;
break;
case VK_SURFACE_TRANSFORM_ROTATE_180_BIT_KHR:
blitRegion.dstOffsets[0].x = dstBinding.extent.x() - blitRegion.dstOffsets[0].x;
blitRegion.dstOffsets[1].x = dstBinding.extent.x() - blitRegion.dstOffsets[1].x;
break;
default:
break;
}
}
} // namespace
VkBool32 VulkanRenderer::DebugCallback(VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity,
@@ -2911,16 +2938,15 @@ void main() {
(readFbo == MG_Impl::GLImpl::FramebufferImpl::pDefaultFramebufferInfo->defaultFBO);
const Bool drawIsDefaultFbo =
(drawFbo == MG_Impl::GLImpl::FramebufferImpl::pDefaultFramebufferInfo->defaultFBO);
if (isColorBlit && drawIsDefaultFbo) {
if (isColorBlit && drawIsDefaultFbo &&
RequiresShaderBlitToDefaultFramebuffer(m_swapchainObject.GetPreTransform())) {
if (TryBlitToDefaultFramebufferWithShader(frame, *readFbo, *drawFbo,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, filter)) {
return;
}
if (m_swapchainObject.GetPreTransform() != VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR) {
MGLOG_E("BlitFramebuffer skipped: transformed blit to default framebuffer requires a texture-backed source framebuffer");
return;
}
MGLOG_E("BlitFramebuffer skipped: rotated blit to default framebuffer requires a texture-backed source framebuffer");
return;
}
if (isDepthBlit) {
@@ -3159,6 +3185,9 @@ void main() {
blitRegion.dstSubresource.layerCount = 1;
blitRegion.dstOffsets[0] = {dstX0, dstY0, 0};
blitRegion.dstOffsets[1] = {dstX1, dstY1, 1};
if (drawIsDefaultFbo) {
ApplyNativeBlitDefaultFramebufferTransform(m_swapchainObject.GetPreTransform(), dstBinding, blitRegion);
}
vkCmdBlitImage(frame.commandBuffer,
srcBinding.image, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,