[dxvk] Support component mappings in blitter

src/dxvk/dxvk_context.cpp

@@ -265,17 +265,22 @@ namespace dxvk {
 
   void DxvkContext::blitImage(
     const Rc<DxvkImage>&        dstImage,
+    const VkComponentMapping&   dstMapping,
     const Rc<DxvkImage>&        srcImage,
+    const VkComponentMapping&   srcMapping,
     const VkImageBlit&          region,
           VkFilter              filter) {
     this->spillRenderPass();
 
+    auto mapping = util::resolveSrcComponentMapping(dstMapping, srcMapping);
+
     bool canUseFb = (srcImage->info().usage & VK_IMAGE_USAGE_SAMPLED_BIT)
                  && (dstImage->info().usage & VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT)
                  && ((dstImage->info().flags & VK_IMAGE_CREATE_2D_ARRAY_COMPATIBLE_BIT_KHR)
                   || (dstImage->info().type != VK_IMAGE_TYPE_3D));
 
-    bool useFb = dstImage->info().sampleCount != VK_SAMPLE_COUNT_1_BIT;
+    bool useFb = dstImage->info().sampleCount != VK_SAMPLE_COUNT_1_BIT
+              || !util::isIdentityMapping(mapping);
 
     if (!useFb) {
       this->blitImageHw(
@@ -284,7 +289,7 @@ namespace dxvk {
     } else if (canUseFb) {
       this->blitImageFb(
         dstImage, srcImage,
-        region, filter);
+        region, mapping, filter);
     } else {
       Logger::err("DxvkContext: Unsupported blit operation");
     }
@@ -2396,6 +2401,7 @@ namespace dxvk {
     const Rc<DxvkImage>&        dstImage,
     const Rc<DxvkImage>&        srcImage,
     const VkImageBlit&          region,
+    const VkComponentMapping&   mapping,
           VkFilter              filter) {
     auto dstSubresourceRange = vk::makeSubresourceRange(region.dstSubresource);
     auto srcSubresourceRange = vk::makeSubresourceRange(region.srcSubresource);
@@ -2431,7 +2437,7 @@ namespace dxvk {
 
     // Begin render pass
     Rc<DxvkMetaBlitRenderPass> pass = new DxvkMetaBlitRenderPass(
-      m_device, dstImage, srcImage, region);
+      m_device, dstImage, srcImage, region, mapping);
     DxvkMetaBlitPass passObjects = pass->pass();
 
     VkExtent3D imageExtent = dstImage->mipLevelExtent(region.dstSubresource.mipLevel);

src/dxvk/dxvk_context.h

@@ -188,7 +188,9 @@ namespace dxvk {
      */
     void blitImage(
       const Rc<DxvkImage>&        dstImage,
+      const VkComponentMapping&   dstMapping,
       const Rc<DxvkImage>&        srcImage,
+      const VkComponentMapping&   srcMapping,
       const VkImageBlit&          region,
             VkFilter              filter);
     
@@ -1047,6 +1049,7 @@ namespace dxvk {
       const Rc<DxvkImage>&        dstImage,
       const Rc<DxvkImage>&        srcImage,
       const VkImageBlit&          region,
+      const VkComponentMapping&   mapping,
             VkFilter              filter);
 
     void blitImageHw(

src/dxvk/dxvk_meta_blit.cpp

@@ -15,13 +15,14 @@ namespace dxvk {
     const Rc<DxvkDevice>&       device,
     const Rc<DxvkImage>&        dstImage,
     const Rc<DxvkImage>&        srcImage,
-    const VkImageBlit&          region)
+    const VkImageBlit&          region,
+    const VkComponentMapping&   mapping)
   : m_vkd         (device->vkd()),
     m_dstImage    (dstImage),
     m_srcImage    (srcImage),
     m_region      (region),
     m_dstView     (createDstView()),
-    m_srcView     (createSrcView()),
+    m_srcView     (createSrcView(mapping)),
     m_renderPass  (createRenderPass()),
     m_framebuffer (createFramebuffer()) {
     
@@ -114,7 +115,7 @@ namespace dxvk {
   }
 
 
-  VkImageView DxvkMetaBlitRenderPass::createSrcView() {
+  VkImageView DxvkMetaBlitRenderPass::createSrcView(const VkComponentMapping& mapping) {
     VkImageViewUsageCreateInfo usageInfo;
     usageInfo.sType       = VK_STRUCTURE_TYPE_IMAGE_VIEW_USAGE_CREATE_INFO;
     usageInfo.pNext       = nullptr;
@@ -127,7 +128,7 @@ namespace dxvk {
     info.image            = m_srcImage->handle();
     info.viewType         = this->viewType();
     info.format           = m_srcImage->info().format;
-    info.components       = VkComponentMapping();
+    info.components       = mapping;
     info.subresourceRange = vk::makeSubresourceRange(m_region.srcSubresource);
 
     VkImageView result;

src/dxvk/dxvk_meta_blit.h

@@ -116,7 +116,8 @@ namespace dxvk {
       const Rc<DxvkDevice>&       device,
       const Rc<DxvkImage>&        dstImage,
       const Rc<DxvkImage>&        srcImage,
-      const VkImageBlit&          region);
+      const VkImageBlit&          region,
+      const VkComponentMapping&   mapping);
 
     ~DxvkMetaBlitRenderPass();
 
@@ -140,7 +141,7 @@ namespace dxvk {
     VkFramebuffer     m_framebuffer;
 
     VkImageView createDstView();
-    VkImageView createSrcView();
+    VkImageView createSrcView(const VkComponentMapping& mapping);
 
     VkRenderPass createRenderPass();
     VkFramebuffer createFramebuffer();