video_core: Implement R8_SNORM render target

src/video_core/gpu.h

@@ -75,6 +75,7 @@ enum class RenderTargetFormat : u32 {
     R16_UINT = 0xF1,
     R16_FLOAT = 0xF2,
     R8_UNORM = 0xF3,
+    R8_SNORM = 0xF4,
     R8_UINT = 0xF6,
 };
 

src/video_core/morton.cpp

@@ -48,6 +48,7 @@ static constexpr ConversionArray morton_to_linear_fns = {
     MortonCopy<true, PixelFormat::A2B10G10R10U>,
     MortonCopy<true, PixelFormat::A1B5G5R5U>,
     MortonCopy<true, PixelFormat::R8U>,
+    MortonCopy<true, PixelFormat::R8S>,
     MortonCopy<true, PixelFormat::R8UI>,
     MortonCopy<true, PixelFormat::RGBA16F>,
     MortonCopy<true, PixelFormat::RGBA16U>,
@@ -131,6 +132,7 @@ static constexpr ConversionArray linear_to_morton_fns = {
     MortonCopy<false, PixelFormat::A2B10G10R10U>,
     MortonCopy<false, PixelFormat::A1B5G5R5U>,
     MortonCopy<false, PixelFormat::R8U>,
+    MortonCopy<false, PixelFormat::R8S>,
     MortonCopy<false, PixelFormat::R8UI>,
     MortonCopy<false, PixelFormat::RGBA16F>,
     MortonCopy<false, PixelFormat::RGBA16S>,

src/video_core/renderer_opengl/gl_texture_cache.cpp

@@ -48,6 +48,7 @@ constexpr std::array<FormatTuple, VideoCore::Surface::MaxPixelFormat> tex_format
     {GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV},       // A2B10G10R10U
     {GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV},         // A1B5G5R5U
     {GL_R8, GL_RED, GL_UNSIGNED_BYTE},                            // R8U
+    {GL_R8_SNORM, GL_RED, GL_BYTE},                               // R8S
     {GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE},                  // R8UI
     {GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT},                         // RGBA16F
     {GL_RGBA16, GL_RGBA, GL_UNSIGNED_SHORT},                      // RGBA16U

src/video_core/renderer_vulkan/maxwell_to_vk.cpp

@@ -124,6 +124,7 @@ struct FormatTuple {
     {VK_FORMAT_A2B10G10R10_UNORM_PACK32, Attachable | Storage}, // A2B10G10R10U
     {VK_FORMAT_A1R5G5B5_UNORM_PACK16, Attachable},              // A1B5G5R5U (flipped with swizzle)
     {VK_FORMAT_R8_UNORM, Attachable | Storage},                 // R8U
+    {VK_FORMAT_R8_SNORM, Attachable | Storage},                 // R8S
     {VK_FORMAT_R8_UINT, Attachable | Storage},                  // R8UI
     {VK_FORMAT_R16G16B16A16_SFLOAT, Attachable | Storage},      // RGBA16F
     {VK_FORMAT_R16G16B16A16_UNORM, Attachable | Storage},       // RGBA16U

src/video_core/renderer_vulkan/vk_device.cpp

@@ -98,6 +98,7 @@ std::unordered_map<VkFormat, VkFormatProperties> GetFormatProperties(
         VK_FORMAT_R8G8_SNORM,
         VK_FORMAT_R8G8_UINT,
         VK_FORMAT_R8_UNORM,
+        VK_FORMAT_R8_SNORM,
         VK_FORMAT_R8_UINT,
         VK_FORMAT_B10G11R11_UFLOAT_PACK32,
         VK_FORMAT_R32_SFLOAT,

src/video_core/surface.cpp

@@ -164,6 +164,8 @@ PixelFormat PixelFormatFromRenderTargetFormat(Tegra::RenderTargetFormat format)
         return PixelFormat::R16F;
     case Tegra::RenderTargetFormat::R8_UNORM:
         return PixelFormat::R8U;
+    case Tegra::RenderTargetFormat::R8_SNORM:
+        return PixelFormat::R8S;
     case Tegra::RenderTargetFormat::R8_UINT:
         return PixelFormat::R8UI;
     default:

src/video_core/surface.h

@@ -22,6 +22,7 @@ enum class PixelFormat {
     A2B10G10R10U,
     A1B5G5R5U,
     R8U,
+    R8S,
     R8UI,
     RGBA16F,
     RGBA16U,
@@ -137,6 +138,7 @@ constexpr std::array<u32, MaxPixelFormat> compression_factor_shift_table = {{
     0, // A2B10G10R10U
     0, // A1B5G5R5U
     0, // R8U
+    0, // R8S
     0, // R8UI
     0, // RGBA16F
     0, // RGBA16U
@@ -236,6 +238,7 @@ constexpr std::array<u32, MaxPixelFormat> block_width_table = {{
     1,  // A2B10G10R10U
     1,  // A1B5G5R5U
     1,  // R8U
+    1,  // R8S
     1,  // R8UI
     1,  // RGBA16F
     1,  // RGBA16U
@@ -327,6 +330,7 @@ constexpr std::array<u32, MaxPixelFormat> block_height_table = {{
     1,  // A2B10G10R10U
     1,  // A1B5G5R5U
     1,  // R8U
+    1,  // R8S
     1,  // R8UI
     1,  // RGBA16F
     1,  // RGBA16U
@@ -418,6 +422,7 @@ constexpr std::array<u32, MaxPixelFormat> bpp_table = {{
     32,  // A2B10G10R10U
     16,  // A1B5G5R5U
     8,   // R8U
+    8,   // R8S
     8,   // R8UI
     64,  // RGBA16F
     64,  // RGBA16U