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

3 files changed, 3 insertions, 22 deletions

diff --git a/src/video_core/host_shaders/CMakeLists.txt b/src/video_core/host_shaders/CMakeLists.txt
index cff8e38d6..cd2549232 100644
--- a/src/video_core/host_shaders/CMakeLists.txt
+++ b/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
diff --git a/src/video_core/host_shaders/convert_abgr8_to_d32f.frag b/src/video_core/host_shaders/convert_abgr8_to_d32f.frag
index a1880b916..095b910c2 100644
--- a/src/video_core/host_shaders/convert_abgr8_to_d32f.frag
+++ b/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;
 }
diff --git a/src/video_core/host_shaders/convert_d32f_to_bgra8.frag b/src/video_core/host_shaders/convert_d32f_to_bgra8.frag
deleted file mode 100644
index 789c3e078..000000000
--- a/src/video_core/host_shaders/convert_d32f_to_bgra8.frag
+++ /dev/null
@@ -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
-}