8 files changed, 102 insertions, 7 deletions

diff --git a/src/video_core/renderer_opengl/gl_texture_cache.cpp b/src/video_core/renderer_opengl/gl_texture_cache.cpp
index d12076358..f8c6e5c7e 100644
--- a/src/video_core/renderer_opengl/gl_texture_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_texture_cache.cpp
@@ -182,6 +182,26 @@ GLenum AttachmentType(PixelFormat format) {
     }
 }
 
+GLint ConvertA5B5G5R1_UNORM(SwizzleSource source) {
+    switch (source) {
+    case SwizzleSource::Zero:
+        return GL_ZERO;
+    case SwizzleSource::R:
+        return GL_ALPHA;
+    case SwizzleSource::G:
+        return GL_BLUE;
+    case SwizzleSource::B:
+        return GL_GREEN;
+    case SwizzleSource::A:
+        return GL_RED;
+    case SwizzleSource::OneInt:
+    case SwizzleSource::OneFloat:
+        return GL_ONE;
+    }
+    UNREACHABLE_MSG("Invalid swizzle source={}", source);
+    return GL_NONE;
+}
+
 void ApplySwizzle(GLuint handle, PixelFormat format, std::array<SwizzleSource, 4> swizzle) {
     switch (format) {
     case PixelFormat::D24_UNORM_S8_UINT:
@@ -192,6 +212,12 @@ void ApplySwizzle(GLuint handle, PixelFormat format, std::array<SwizzleSource, 4
                             TextureMode(format, swizzle[0] == SwizzleSource::R));
         std::ranges::transform(swizzle, swizzle.begin(), ConvertGreenRed);
         break;
+    case PixelFormat::A5B5G5R1_UNORM: {
+        std::array<GLint, 4> gl_swizzle;
+        std::ranges::transform(swizzle, gl_swizzle.begin(), ConvertA5B5G5R1_UNORM);
+        glTextureParameteriv(handle, GL_TEXTURE_SWIZZLE_RGBA, gl_swizzle.data());
+        return;
+    }
     default:
         break;
     }
diff --git a/src/video_core/renderer_opengl/maxwell_to_gl.h b/src/video_core/renderer_opengl/maxwell_to_gl.h
index db5bf1d30..03adf3d4c 100644
--- a/src/video_core/renderer_opengl/maxwell_to_gl.h
+++ b/src/video_core/renderer_opengl/maxwell_to_gl.h
@@ -30,6 +30,7 @@ constexpr std::array<FormatTuple, VideoCore::Surface::MaxPixelFormat> FORMAT_TAB
     {GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV},           // A2B10G10R10_UNORM
     {GL_RGB10_A2UI, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV}, // A2B10G10R10_UINT
     {GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV},             // A1B5G5R5_UNORM
+    {GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1},                 // A5B5G5R1_UNORM
     {GL_R8, GL_RED, GL_UNSIGNED_BYTE},                                // R8_UNORM
     {GL_R8_SNORM, GL_RED, GL_BYTE},                                   // R8_SNORM
     {GL_R8I, GL_RED_INTEGER, GL_BYTE},                                // R8_SINT
@@ -87,6 +88,7 @@ constexpr std::array<FormatTuple, VideoCore::Surface::MaxPixelFormat> FORMAT_TAB
     {GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT},                         // BC3_SRGB
     {GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM},                            // BC7_SRGB
     {GL_RGBA4, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4_REV},               // A4B4G4R4_UNORM
+    {GL_R8, GL_RED, GL_UNSIGNED_BYTE},                                // R4G4_UNORM
     {GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR},                        // ASTC_2D_4X4_SRGB
     {GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR},                        // ASTC_2D_8X8_SRGB
     {GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR},                        // ASTC_2D_8X5_SRGB
diff --git a/src/video_core/renderer_vulkan/maxwell_to_vk.cpp b/src/video_core/renderer_vulkan/maxwell_to_vk.cpp
index 1c136c410..a2c6d0e6c 100644
--- a/src/video_core/renderer_vulkan/maxwell_to_vk.cpp
+++ b/src/video_core/renderer_vulkan/maxwell_to_vk.cpp
@@ -127,6 +127,7 @@ struct FormatTuple {
     {VK_FORMAT_A2B10G10R10_UNORM_PACK32, Attachable | Storage}, // A2B10G10R10_UNORM
     {VK_FORMAT_A2B10G10R10_UINT_PACK32, Attachable | Storage},  // A2B10G10R10_UINT
     {VK_FORMAT_A1R5G5B5_UNORM_PACK16, Attachable},         // A1B5G5R5_UNORM (flipped with swizzle)
+    {VK_FORMAT_R5G5B5A1_UNORM_PACK16},                     // A5B5G5R1_UNORM (specially swizzled)
     {VK_FORMAT_R8_UNORM, Attachable | Storage},            // R8_UNORM
     {VK_FORMAT_R8_SNORM, Attachable | Storage},            // R8_SNORM
     {VK_FORMAT_R8_SINT, Attachable | Storage},             // R8_SINT
@@ -184,6 +185,7 @@ struct FormatTuple {
     {VK_FORMAT_BC3_SRGB_BLOCK},                                // BC3_SRGB
     {VK_FORMAT_BC7_SRGB_BLOCK},                                // BC7_SRGB
     {VK_FORMAT_R4G4B4A4_UNORM_PACK16, Attachable},             // A4B4G4R4_UNORM
+    {VK_FORMAT_R4G4_UNORM_PACK8},                              // R4G4_UNORM
     {VK_FORMAT_ASTC_4x4_SRGB_BLOCK},                           // ASTC_2D_4X4_SRGB
     {VK_FORMAT_ASTC_8x8_SRGB_BLOCK},                           // ASTC_2D_8X8_SRGB
     {VK_FORMAT_ASTC_8x5_SRGB_BLOCK},                           // ASTC_2D_8X5_SRGB
diff --git a/src/video_core/renderer_vulkan/vk_texture_cache.cpp b/src/video_core/renderer_vulkan/vk_texture_cache.cpp
index 2c2ccc7c6..49691ce0c 100644
--- a/src/video_core/renderer_vulkan/vk_texture_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_texture_cache.cpp
@@ -438,6 +438,32 @@ constexpr VkBorderColor ConvertBorderColor(const std::array<float, 4>& color) {
     }
 }
 
+[[nodiscard]] SwizzleSource SwapGreenRed(SwizzleSource value) {
+    switch (value) {
+    case SwizzleSource::R:
+        return SwizzleSource::G;
+    case SwizzleSource::G:
+        return SwizzleSource::R;
+    default:
+        return value;
+    }
+}
+
+[[nodiscard]] SwizzleSource SwapSpecial(SwizzleSource value) {
+    switch (value) {
+    case SwizzleSource::A:
+        return SwizzleSource::R;
+    case SwizzleSource::R:
+        return SwizzleSource::A;
+    case SwizzleSource::G:
+        return SwizzleSource::B;
+    case SwizzleSource::B:
+        return SwizzleSource::G;
+    default:
+        return value;
+    }
+}
+
 void CopyBufferToImage(vk::CommandBuffer cmdbuf, VkBuffer src_buffer, VkImage image,
                        VkImageAspectFlags aspect_mask, bool is_initialized,
                        std::span<const VkBufferImageCopy> copies) {
@@ -554,14 +580,25 @@ void CopyBufferToImage(vk::CommandBuffer cmdbuf, VkBuffer src_buffer, VkImage im
     };
 }
 
-[[nodiscard]] bool IsFormatFlipped(PixelFormat format, bool emulate_bgr565) {
+void TryTransformSwizzleIfNeeded(PixelFormat format, std::array<SwizzleSource, 4>& swizzle,
+                                 bool emulate_bgr565) {
     switch (format) {
     case PixelFormat::A1B5G5R5_UNORM:
-        return true;
+        std::ranges::transform(swizzle, swizzle.begin(), SwapBlueRed);
+        break;
     case PixelFormat::B5G6R5_UNORM:
-        return emulate_bgr565;
+        if (emulate_bgr565) {
+            std::ranges::transform(swizzle, swizzle.begin(), SwapBlueRed);
+        }
+        break;
+    case PixelFormat::A5B5G5R1_UNORM:
+        std::ranges::transform(swizzle, swizzle.begin(), SwapSpecial);
+        break;
+    case PixelFormat::R4G4_UNORM:
+        std::ranges::transform(swizzle, swizzle.begin(), SwapGreenRed);
+        break;
     default:
-        return false;
+        break;
     }
 }
 
@@ -1496,9 +1533,7 @@ ImageView::ImageView(TextureCacheRuntime& runtime, const VideoCommon::ImageViewI
     };
     if (!info.IsRenderTarget()) {
         swizzle = info.Swizzle();
-        if (IsFormatFlipped(format, device->MustEmulateBGR565())) {
-            std::ranges::transform(swizzle, swizzle.begin(), SwapBlueRed);
-        }
+        TryTransformSwizzleIfNeeded(format, swizzle, device->MustEmulateBGR565());
         if ((aspect_mask & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) != 0) {
             std::ranges::transform(swizzle, swizzle.begin(), ConvertGreenRed);
         }
diff --git a/src/video_core/surface.h b/src/video_core/surface.h
index 5704cf16a..86fea61ae 100644
--- a/src/video_core/surface.h
+++ b/src/video_core/surface.h
@@ -25,6 +25,7 @@ enum class PixelFormat {
     A2B10G10R10_UNORM,
     A2B10G10R10_UINT,
     A1B5G5R5_UNORM,
+    A5B5G5R1_UNORM,
     R8_UNORM,
     R8_SNORM,
     R8_SINT,
@@ -82,6 +83,7 @@ enum class PixelFormat {
     BC3_SRGB,
     BC7_SRGB,
     A4B4G4R4_UNORM,
+    R4G4_UNORM,
     ASTC_2D_4X4_SRGB,
     ASTC_2D_8X8_SRGB,
     ASTC_2D_8X5_SRGB,
@@ -156,6 +158,7 @@ constexpr std::array<u32, MaxPixelFormat> BLOCK_WIDTH_TABLE = {{
     1,  // A2B10G10R10_UNORM
     1,  // A2B10G10R10_UINT
     1,  // A1B5G5R5_UNORM
+    1,  // A5B5G5R1_UNORM
     1,  // R8_UNORM
     1,  // R8_SNORM
     1,  // R8_SINT
@@ -213,6 +216,7 @@ constexpr std::array<u32, MaxPixelFormat> BLOCK_WIDTH_TABLE = {{
     4,  // BC3_SRGB
     4,  // BC7_SRGB
     1,  // A4B4G4R4_UNORM
+    1,  // R4G4_UNORM
     4,  // ASTC_2D_4X4_SRGB
     8,  // ASTC_2D_8X8_SRGB
     8,  // ASTC_2D_8X5_SRGB
@@ -256,6 +260,7 @@ constexpr std::array<u32, MaxPixelFormat> BLOCK_HEIGHT_TABLE = {{
     1,  // A2B10G10R10_UNORM
     1,  // A2B10G10R10_UINT
     1,  // A1B5G5R5_UNORM
+    1,  // A5B5G5R1_UNORM
     1,  // R8_UNORM
     1,  // R8_SNORM
     1,  // R8_SINT
@@ -313,6 +318,7 @@ constexpr std::array<u32, MaxPixelFormat> BLOCK_HEIGHT_TABLE = {{
     4,  // BC3_SRGB
     4,  // BC7_SRGB
     1,  // A4B4G4R4_UNORM
+    1,  // R4G4_UNORM
     4,  // ASTC_2D_4X4_SRGB
     8,  // ASTC_2D_8X8_SRGB
     5,  // ASTC_2D_8X5_SRGB
@@ -356,6 +362,7 @@ constexpr std::array<u32, MaxPixelFormat> BITS_PER_BLOCK_TABLE = {{
     32,  // A2B10G10R10_UNORM
     32,  // A2B10G10R10_UINT
     16,  // A1B5G5R5_UNORM
+    16,  // A5B5G5R1_UNORM
     8,   // R8_UNORM
     8,   // R8_SNORM
     8,   // R8_SINT
@@ -413,6 +420,7 @@ constexpr std::array<u32, MaxPixelFormat> BITS_PER_BLOCK_TABLE = {{
     128, // BC3_SRGB
     128, // BC7_UNORM
     16,  // A4B4G4R4_UNORM
+    8,   // R4G4_UNORM
     128, // ASTC_2D_4X4_SRGB
     128, // ASTC_2D_8X8_SRGB
     128, // ASTC_2D_8X5_SRGB
diff --git a/src/video_core/texture_cache/format_lookup_table.cpp b/src/video_core/texture_cache/format_lookup_table.cpp
index afa807d5d..20e64a7c2 100644
--- a/src/video_core/texture_cache/format_lookup_table.cpp
+++ b/src/video_core/texture_cache/format_lookup_table.cpp
@@ -63,6 +63,10 @@ PixelFormat PixelFormatFromTextureInfo(TextureFormat format, ComponentType red,
         return PixelFormat::A1B5G5R5_UNORM;
     case Hash(TextureFormat::A4B4G4R4, UNORM):
         return PixelFormat::A4B4G4R4_UNORM;
+    case Hash(TextureFormat::G4R4, UNORM):
+        return PixelFormat::R4G4_UNORM;
+    case Hash(TextureFormat::A5B5G5R1, UNORM):
+        return PixelFormat::A5B5G5R1_UNORM;
     case Hash(TextureFormat::R8, UNORM):
         return PixelFormat::R8_UNORM;
     case Hash(TextureFormat::R8, SNORM):
@@ -143,6 +147,8 @@ PixelFormat PixelFormatFromTextureInfo(TextureFormat format, ComponentType red,
         return PixelFormat::S8_UINT_D24_UNORM;
     case Hash(TextureFormat::R8G24, UINT, UNORM, UNORM, UNORM, LINEAR):
         return PixelFormat::S8_UINT_D24_UNORM;
+    case Hash(TextureFormat::D24S8, UNORM, UINT, UINT, UINT, LINEAR):
+        return PixelFormat::D24_UNORM_S8_UINT;
     case Hash(TextureFormat::D32S8, FLOAT, UINT, UNORM, UNORM, LINEAR):
         return PixelFormat::D32_FLOAT_S8_UINT;
     case Hash(TextureFormat::BC1_RGBA, UNORM, LINEAR):
diff --git a/src/video_core/texture_cache/formatter.h b/src/video_core/texture_cache/formatter.h
index b2c81057b..6f5afc5a9 100644
--- a/src/video_core/texture_cache/formatter.h
+++ b/src/video_core/texture_cache/formatter.h
@@ -38,6 +38,8 @@ struct fmt::formatter<VideoCore::Surface::PixelFormat> : fmt::formatter<fmt::str
                 return "A2B10G10R10_UINT";
             case PixelFormat::A1B5G5R5_UNORM:
                 return "A1B5G5R5_UNORM";
+            case PixelFormat::A5B5G5R1_UNORM:
+                return "A5B5G5R1_UNORM";
             case PixelFormat::R8_UNORM:
                 return "R8_UNORM";
             case PixelFormat::R8_SNORM:
@@ -152,6 +154,8 @@ struct fmt::formatter<VideoCore::Surface::PixelFormat> : fmt::formatter<fmt::str
                 return "BC7_SRGB";
             case PixelFormat::A4B4G4R4_UNORM:
                 return "A4B4G4R4_UNORM";
+            case PixelFormat::R4G4_UNORM:
+                return "R4G4_UNORM";
             case PixelFormat::ASTC_2D_4X4_SRGB:
                 return "ASTC_2D_4X4_SRGB";
             case PixelFormat::ASTC_2D_8X8_SRGB:
diff --git a/src/video_core/vulkan_common/vulkan_device.cpp b/src/video_core/vulkan_common/vulkan_device.cpp
index f3a05ada9..bd05a1f84 100644
--- a/src/video_core/vulkan_common/vulkan_device.cpp
+++ b/src/video_core/vulkan_common/vulkan_device.cpp
@@ -45,6 +45,12 @@ constexpr std::array B5G6R5_UNORM_PACK16{
     VK_FORMAT_R5G6B5_UNORM_PACK16,
     VK_FORMAT_UNDEFINED,
 };
+
+constexpr std::array R4G4_UNORM_PACK8{
+    VK_FORMAT_R8_UNORM,
+    VK_FORMAT_UNDEFINED,
+};
+
 } // namespace Alternatives
 
 enum class NvidiaArchitecture {
@@ -95,6 +101,8 @@ constexpr const VkFormat* GetFormatAlternatives(VkFormat format) {
         return Alternatives::DEPTH16_UNORM_STENCIL8_UINT.data();
     case VK_FORMAT_B5G6R5_UNORM_PACK16:
         return Alternatives::B5G6R5_UNORM_PACK16.data();
+    case VK_FORMAT_R4G4_UNORM_PACK8:
+        return Alternatives::R4G4_UNORM_PACK8.data();
     default:
         return nullptr;
     }
@@ -122,6 +130,8 @@ std::unordered_map<VkFormat, VkFormatProperties> GetFormatProperties(vk::Physica
         VK_FORMAT_A8B8G8R8_SRGB_PACK32,
         VK_FORMAT_R5G6B5_UNORM_PACK16,
         VK_FORMAT_B5G6R5_UNORM_PACK16,
+        VK_FORMAT_R5G5B5A1_UNORM_PACK16,
+        VK_FORMAT_B5G5R5A1_UNORM_PACK16,
         VK_FORMAT_A2B10G10R10_UNORM_PACK32,
         VK_FORMAT_A2B10G10R10_UINT_PACK32,
         VK_FORMAT_A1R5G5B5_UNORM_PACK16,
@@ -160,7 +170,9 @@ std::unordered_map<VkFormat, VkFormatProperties> GetFormatProperties(vk::Physica
         VK_FORMAT_R16G16B16A16_SFLOAT,
         VK_FORMAT_B8G8R8A8_UNORM,
         VK_FORMAT_B8G8R8A8_SRGB,
+        VK_FORMAT_R4G4_UNORM_PACK8,
         VK_FORMAT_R4G4B4A4_UNORM_PACK16,
+        VK_FORMAT_B4G4R4A4_UNORM_PACK16,
         VK_FORMAT_D32_SFLOAT,
         VK_FORMAT_D16_UNORM,
         VK_FORMAT_S8_UINT,