Changes based on hardware tests

Removes unnecessary d32f to bgra shader and blit functions,
update vk_texture_cache to use abgr shader for d32f to BGRA formats
updates  abgr to d32f shader to comply with hardware tests

src/video_core/host_shaders/CMakeLists.txt

@@ -21,7 +21,6 @@ set(SHADER_FILES
     convert_abgr8_to_d24s8.frag
     convert_abgr8_to_d32f.frag
     convert_d32f_to_abgr8.frag
-    convert_d32f_to_bgra8.frag
     convert_d24s8_to_abgr8.frag
     convert_depth_to_float.frag
     convert_float_to_depth.frag

src/video_core/host_shaders/convert_abgr8_to_d32f.frag

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2023 Your Project
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #version 450
@@ -9,10 +9,7 @@ void main() {
     ivec2 coord = ivec2(gl_FragCoord.xy);
     vec4 color = texelFetch(color_texture, coord, 0).abgr;
 
-    uvec4 bytes = uvec4(color * (exp2(8) - 1.0f)) << uvec4(24, 16, 8, 0);
-    uint depth_unorm = bytes.x | bytes.y | bytes.z | bytes.w;
+    float value = color.a * (color.r + color.g + color.b) / 3.0f;
 
-    float depth_float = uintBitsToFloat(depth_unorm);
-
-    gl_FragDepth = depth_float;
+    gl_FragDepth = value;
 }

src/video_core/host_shaders/convert_d32f_to_bgra8.frag

@@ -1,15 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#version 450
-
-layout(binding = 0) uniform sampler2D depth_tex;
-
-layout(location = 0) out vec4 color;
-
-void main() {
-    ivec2 coord = ivec2(gl_FragCoord.xy);
-    float depth = texelFetch(depth_tex, coord, 0).r;
-    color = vec4(depth, depth, depth, 1.0);
-    color = color.bgra; // Swap color channels for BGRA format
-}

src/video_core/renderer_vulkan/blit_image.cpp

@@ -11,7 +11,6 @@
 #include "video_core/host_shaders/convert_abgr8_to_d32f_frag_spv.h"
 #include "video_core/host_shaders/convert_d24s8_to_abgr8_frag_spv.h"
 #include "video_core/host_shaders/convert_d32f_to_abgr8_frag_spv.h"
-#include "video_core/host_shaders/convert_d32f_to_bgra8_frag_spv.h"
 #include "video_core/host_shaders/convert_depth_to_float_frag_spv.h"
 #include "video_core/host_shaders/convert_float_to_depth_frag_spv.h"
 #include "video_core/host_shaders/convert_s8d24_to_abgr8_frag_spv.h"
@@ -440,7 +439,6 @@ BlitImageHelper::BlitImageHelper(const Device& device_, Scheduler& scheduler_,
       convert_d32f_to_abgr8_frag(BuildShader(device, CONVERT_D32F_TO_ABGR8_FRAG_SPV)),
       convert_d24s8_to_abgr8_frag(BuildShader(device, CONVERT_D24S8_TO_ABGR8_FRAG_SPV)),
       convert_s8d24_to_abgr8_frag(BuildShader(device, CONVERT_S8D24_TO_ABGR8_FRAG_SPV)),
-      convert_d32f_to_bgra8_frag(BuildShader(device, CONVERT_D32F_TO_BGRA8_FRAG_SPV)),
       linear_sampler(device.GetLogical().CreateSampler(SAMPLER_CREATE_INFO<VK_FILTER_LINEAR>)),
       nearest_sampler(device.GetLogical().CreateSampler(SAMPLER_CREATE_INFO<VK_FILTER_NEAREST>)) {}
 
@@ -591,13 +589,6 @@ void BlitImageHelper::ConvertS8D24ToABGR8(const Framebuffer* dst_framebuffer,
     ConvertDepthStencil(*convert_s8d24_to_abgr8_pipeline, dst_framebuffer, src_image_view);
 }
 
-void BlitImageHelper::ConvertD32FToBGRA8(const Framebuffer* dst_framebuffer,
-                                         ImageView& src_image_view) {
-    ConvertPipelineColorTargetEx(convert_d32f_to_bgra8_pipeline, dst_framebuffer->RenderPass(),
-                                 convert_d32f_to_bgra8_frag);
-    ConvertDepthStencil(*convert_d32f_to_bgra8_pipeline, dst_framebuffer, src_image_view);
-}
-
 void BlitImageHelper::ClearColor(const Framebuffer* dst_framebuffer, u8 color_mask,
                                  const std::array<f32, 4>& clear_color,
                                  const Region2D& dst_region) {

src/video_core/renderer_vulkan/blit_image.h

@@ -75,8 +75,6 @@ public:
 
     void ConvertS8D24ToABGR8(const Framebuffer* dst_framebuffer, ImageView& src_image_view);
 
-    void ConvertD32FToBGRA8(const Framebuffer* dst_framebuffer, ImageView& src_image_view);
-
     void ClearColor(const Framebuffer* dst_framebuffer, u8 color_mask,
                     const std::array<f32, 4>& clear_color, const Region2D& dst_region);
 
@@ -138,7 +136,6 @@ private:
     vk::ShaderModule convert_d32f_to_abgr8_frag;
     vk::ShaderModule convert_d24s8_to_abgr8_frag;
     vk::ShaderModule convert_s8d24_to_abgr8_frag;
-    vk::ShaderModule convert_d32f_to_bgra8_frag;
     vk::Sampler linear_sampler;
     vk::Sampler nearest_sampler;
 
@@ -159,7 +156,6 @@ private:
     vk::Pipeline convert_d32f_to_abgr8_pipeline;
     vk::Pipeline convert_d24s8_to_abgr8_pipeline;
     vk::Pipeline convert_s8d24_to_abgr8_pipeline;
-    vk::Pipeline convert_d32f_to_bgra8_pipeline;
 };
 
 } // namespace Vulkan

src/video_core/renderer_vulkan/vk_texture_cache.cpp

@@ -1211,12 +1211,12 @@ void TextureCacheRuntime::ConvertImage(Framebuffer* dst, ImageView& dst_view, Im
         break;
     case PixelFormat::B8G8R8A8_SRGB:
         if (src_view.format == PixelFormat::D32_FLOAT) {
-            return blit_image_helper.ConvertD32FToBGRA8(dst, src_view);
+            return blit_image_helper.ConvertD32FToABGR8(dst, src_view);
         }
         break;
     case PixelFormat::B8G8R8A8_UNORM:
         if (src_view.format == PixelFormat::D32_FLOAT) {
-            return blit_image_helper.ConvertD32FToBGRA8(dst, src_view);
+            return blit_image_helper.ConvertD32FToABGR8(dst, src_view);
         }
         break;
     case PixelFormat::R32_FLOAT: