From 2985056340b04c81df6afcf841dd541c94204817 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Wed, 18 Apr 2018 18:11:14 -0500
Subject: GPU: Implemented the B5G6R5 format.

---
 src/video_core/renderer_opengl/gl_rasterizer_cache.cpp | 15 ++++++++++-----
 src/video_core/renderer_opengl/gl_rasterizer_cache.h   | 16 +++++++++++++---
 src/video_core/textures/decoders.cpp                   |  4 ++++
 src/video_core/textures/texture.h                      |  1 +
 4 files changed, 28 insertions(+), 8 deletions(-)

(limited to 'src/video_core')

diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 9ccc63090..2a0858eac 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -48,8 +48,9 @@ struct FormatTuple {
     u32 compression_factor;
 };
 
-static constexpr std::array<FormatTuple, 2> tex_format_tuples = {{
+static constexpr std::array<FormatTuple, SurfaceParams::MaxPixelFormat> tex_format_tuples = {{
     {GL_RGBA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, false, 1},                   // ABGR8
+    {GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV, false, 1},                      // B5G6R5
     {GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_RGB, GL_UNSIGNED_INT_8_8_8_8, true, 16}, // DXT1
 }};
 
@@ -117,15 +118,19 @@ void MortonCopy(u32 stride, u32 block_height, u32 height, u8* gl_buffer, VAddr b
     }
 }
 
-static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr), 2> morton_to_gl_fns =
-    {
+static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr),
+                            SurfaceParams::MaxPixelFormat>
+    morton_to_gl_fns = {
         MortonCopy<true, PixelFormat::ABGR8>,
+        MortonCopy<true, PixelFormat::B5G6R5>,
         MortonCopy<true, PixelFormat::DXT1>,
 };
 
-static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr), 2> gl_to_morton_fns =
-    {
+static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr),
+                            SurfaceParams::MaxPixelFormat>
+    gl_to_morton_fns = {
         MortonCopy<false, PixelFormat::ABGR8>,
+        MortonCopy<false, PixelFormat::B5G6R5>,
         // TODO(Subv): Swizzling the DXT1 format is not yet supported
         nullptr,
 };
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.h b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
index 0ff0ce90f..23e4d02d8 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
@@ -53,10 +53,15 @@ enum class ScaleMatch {
 struct SurfaceParams {
     enum class PixelFormat {
         ABGR8 = 0,
-        DXT1 = 1,
+        B5G6R5 = 1,
+        DXT1 = 2,
+
+        Max,
         Invalid = 255,
     };
 
+    static constexpr size_t MaxPixelFormat = static_cast<size_t>(PixelFormat::Max);
+
     enum class ComponentType {
         Invalid = 0,
         SNorm = 1,
@@ -78,8 +83,9 @@ struct SurfaceParams {
         if (format == PixelFormat::Invalid)
             return 0;
 
-        constexpr std::array<unsigned int, 2> bpp_table = {
+        constexpr std::array<unsigned int, MaxPixelFormat> bpp_table = {
             32, // ABGR8
+            16, // B5G6R5
             64, // DXT1
         };
 
@@ -115,6 +121,8 @@ struct SurfaceParams {
         switch (format) {
         case Tegra::Texture::TextureFormat::A8R8G8B8:
             return PixelFormat::ABGR8;
+        case Tegra::Texture::TextureFormat::B5G6R5:
+            return PixelFormat::B5G6R5;
         case Tegra::Texture::TextureFormat::DXT1:
             return PixelFormat::DXT1;
         default:
@@ -128,6 +136,8 @@ struct SurfaceParams {
         switch (format) {
         case PixelFormat::ABGR8:
             return Tegra::Texture::TextureFormat::A8R8G8B8;
+        case PixelFormat::B5G6R5:
+            return Tegra::Texture::TextureFormat::B5G6R5;
         case PixelFormat::DXT1:
             return Tegra::Texture::TextureFormat::DXT1;
         default:
@@ -189,7 +199,7 @@ struct SurfaceParams {
     }
 
     static SurfaceType GetFormatType(PixelFormat pixel_format) {
-        if ((unsigned int)pixel_format <= static_cast<unsigned int>(PixelFormat::DXT1)) {
+        if (static_cast<size_t>(pixel_format) < MaxPixelFormat) {
             return SurfaceType::ColorTexture;
         }
 
diff --git a/src/video_core/textures/decoders.cpp b/src/video_core/textures/decoders.cpp
index 9c2a10d2e..f4c7e40df 100644
--- a/src/video_core/textures/decoders.cpp
+++ b/src/video_core/textures/decoders.cpp
@@ -50,6 +50,8 @@ u32 BytesPerPixel(TextureFormat format) {
         return 8;
     case TextureFormat::A8R8G8B8:
         return 4;
+    case TextureFormat::B5G6R5:
+        return 2;
     default:
         UNIMPLEMENTED_MSG("Format not implemented");
         break;
@@ -70,6 +72,7 @@ std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width,
                          unswizzled_data.data(), true, block_height);
         break;
     case TextureFormat::A8R8G8B8:
+    case TextureFormat::B5G6R5:
         CopySwizzledData(width, height, bytes_per_pixel, bytes_per_pixel, data,
                          unswizzled_data.data(), true, block_height);
         break;
@@ -89,6 +92,7 @@ std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat
     switch (format) {
     case TextureFormat::DXT1:
     case TextureFormat::A8R8G8B8:
+    case TextureFormat::B5G6R5:
         // TODO(Subv): For the time being just forward the same data without any decoding.
         rgba_data = texture_data;
         break;
diff --git a/src/video_core/textures/texture.h b/src/video_core/textures/texture.h
index 09d2317e0..86e45aa88 100644
--- a/src/video_core/textures/texture.h
+++ b/src/video_core/textures/texture.h
@@ -15,6 +15,7 @@ namespace Texture {
 
 enum class TextureFormat : u32 {
     A8R8G8B8 = 0x8,
+    B5G6R5 = 0x15,
     DXT1 = 0x24,
     DXT23 = 0x25,
     DXT45 = 0x26,
-- 
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