gl_rasterizer: Implement texture format ASTC_2D_4X4.

src/video_core/CMakeLists.txt

@@ -41,6 +41,8 @@ add_library(video_core STATIC
     renderer_opengl/maxwell_to_gl.h
     renderer_opengl/renderer_opengl.cpp
     renderer_opengl/renderer_opengl.h
+    textures/astc.cpp
+    textures/astc.h
     textures/decoders.cpp
     textures/decoders.h
     textures/texture.h

src/video_core/renderer_opengl/gl_rasterizer_cache.cpp

@@ -28,6 +28,7 @@
 #include "video_core/engines/maxwell_3d.h"
 #include "video_core/renderer_opengl/gl_rasterizer_cache.h"
 #include "video_core/renderer_opengl/gl_state.h"
+#include "video_core/textures/astc.h"
 #include "video_core/textures/decoders.h"
 #include "video_core/utils.h"
 #include "video_core/video_core.h"
@@ -55,6 +56,7 @@ static constexpr std::array<FormatTuple, SurfaceParams::MaxPixelFormat> tex_form
     {GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, true}, // DXT23
     {GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, true}, // DXT45
     {GL_COMPRESSED_RED_RGTC1, GL_RED, GL_UNSIGNED_INT_8_8_8_8, true},           // DXN1
+    {GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, false},                               // ASTC_2D_4X4
 }};
 
 static const FormatTuple& GetFormatTuple(PixelFormat pixel_format, ComponentType component_type) {
@@ -86,6 +88,23 @@ static u16 GetResolutionScaleFactor() {
                                 : Settings::values.resolution_factor);
 }
 
+static void ConvertASTCToRGBA8(std::vector<u8>& data, PixelFormat format, u32 width, u32 height) {
+    u32 block_width{};
+    u32 block_height{};
+
+    switch (format) {
+    case PixelFormat::ASTC_2D_4X4:
+        block_width = 4;
+        block_height = 4;
+        break;
+    default:
+        NGLOG_CRITICAL(HW_GPU, "Unhandled format: {}", static_cast<u32>(format));
+        UNREACHABLE();
+    }
+
+    data = Tegra::Texture::ASTC::Decompress(data, width, height, block_width, block_height);
+}
+
 template <bool morton_to_gl, PixelFormat format>
 void MortonCopy(u32 stride, u32 block_height, u32 height, u8* gl_buffer, Tegra::GPUVAddr base,
                 Tegra::GPUVAddr start, Tegra::GPUVAddr end) {
@@ -97,6 +116,12 @@ void MortonCopy(u32 stride, u32 block_height, u32 height, u8* gl_buffer, Tegra::
         auto data = Tegra::Texture::UnswizzleTexture(
             *gpu.memory_manager->GpuToCpuAddress(base),
             SurfaceParams::TextureFormatFromPixelFormat(format), stride, height, block_height);
+
+        if (SurfaceParams::IsFormatASTC(format)) {
+            // ASTC formats are converted to RGBA8 in software, as most PC GPUs do not support this
+            ConvertASTCToRGBA8(data, format, stride, height);
+        }
+
         std::memcpy(gl_buffer, data.data(), data.size());
     } else {
         // TODO(bunnei): Assumes the default rendering GOB size of 16 (128 lines). We should check
@@ -118,7 +143,7 @@ static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr, Tegra:
         MortonCopy<true, PixelFormat::R8>,           MortonCopy<true, PixelFormat::RGBA16F>,
         MortonCopy<true, PixelFormat::R11FG11FB10F>, MortonCopy<true, PixelFormat::DXT1>,
         MortonCopy<true, PixelFormat::DXT23>,        MortonCopy<true, PixelFormat::DXT45>,
-        MortonCopy<true, PixelFormat::DXN1>,
+        MortonCopy<true, PixelFormat::DXN1>,         MortonCopy<true, PixelFormat::ASTC_2D_4X4>,
 };
 
 static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr, Tegra::GPUVAddr,
@@ -137,6 +162,7 @@ static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr, Tegra:
         nullptr,
         nullptr,
         nullptr,
+        MortonCopy<false, PixelFormat::ABGR8>,
 };
 
 // Allocate an uninitialized texture of appropriate size and format for the surface

src/video_core/renderer_opengl/gl_rasterizer_cache.h

@@ -65,6 +65,7 @@ struct SurfaceParams {
         DXT23 = 8,
         DXT45 = 9,
         DXN1 = 10, // This is also known as BC4
+        ASTC_2D_4X4 = 11,
 
         Max,
         Invalid = 255,
@@ -111,6 +112,7 @@ struct SurfaceParams {
             4, // DXT23
             4, // DXT45
             4, // DXN1
+            1, // ASTC_2D_4X4
         }};
 
         ASSERT(static_cast<size_t>(format) < compression_factor_table.size());
@@ -136,6 +138,7 @@ struct SurfaceParams {
             128, // DXT23
             128, // DXT45
             64,  // DXN1
+            32,  // ASTC_2D_4X4
         }};
 
         ASSERT(static_cast<size_t>(format) < bpp_table.size());
@@ -162,6 +165,15 @@ struct SurfaceParams {
         }
     }
 
+    static bool IsFormatASTC(PixelFormat format) {
+        switch (format) {
+        case PixelFormat::ASTC_2D_4X4:
+            return true;
+        default:
+            return false;
+        }
+    }
+
     static PixelFormat PixelFormatFromGPUPixelFormat(Tegra::FramebufferConfig::PixelFormat format) {
         switch (format) {
         case Tegra::FramebufferConfig::PixelFormat::ABGR8:
@@ -197,6 +209,8 @@ struct SurfaceParams {
             return PixelFormat::DXT45;
         case Tegra::Texture::TextureFormat::DXN1:
             return PixelFormat::DXN1;
+        case Tegra::Texture::TextureFormat::ASTC_2D_4X4:
+            return PixelFormat::ASTC_2D_4X4;
         default:
             NGLOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
             UNREACHABLE();
@@ -228,6 +242,8 @@ struct SurfaceParams {
             return Tegra::Texture::TextureFormat::DXT45;
         case PixelFormat::DXN1:
             return Tegra::Texture::TextureFormat::DXN1;
+        case PixelFormat::ASTC_2D_4X4:
+            return Tegra::Texture::TextureFormat::ASTC_2D_4X4;
         default:
             UNREACHABLE();
         }

src/video_core/textures/astc.h

@@ -0,0 +1,15 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstdint>
+#include <vector>
+
+namespace Tegra::Texture::ASTC {
+
+std::vector<uint8_t> Decompress(std::vector<uint8_t>& data, uint32_t width, uint32_t height,
+                                uint32_t block_width, uint32_t block_height);
+
+} // namespace Tegra::Texture::ASTC

src/video_core/textures/decoders.cpp

@@ -53,6 +53,7 @@ u32 BytesPerPixel(TextureFormat format) {
     case TextureFormat::DXT45:
         // In this case a 'pixel' actually refers to a 4x4 tile.
         return 16;
+    case TextureFormat::ASTC_2D_4X4:
     case TextureFormat::A8R8G8B8:
     case TextureFormat::A2B10G10R10:
     case TextureFormat::BF10GF11RF11:
@@ -94,6 +95,7 @@ std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width,
     case TextureFormat::R8:
     case TextureFormat::R16_G16_B16_A16:
     case TextureFormat::BF10GF11RF11:
+    case TextureFormat::ASTC_2D_4X4:
         CopySwizzledData(width, height, bytes_per_pixel, bytes_per_pixel, data,
                          unswizzled_data.data(), true, block_height);
         break;
@@ -115,6 +117,7 @@ std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat
     case TextureFormat::DXT23:
     case TextureFormat::DXT45:
     case TextureFormat::DXN1:
+    case TextureFormat::ASTC_2D_4X4:
     case TextureFormat::A8R8G8B8:
     case TextureFormat::A2B10G10R10:
     case TextureFormat::A1B5G5R5: