From ccc42702b53ac7585cc3a0db6dc5691875528167 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Mon, 23 Jul 2018 22:21:31 -0500
Subject: [PATCH] GPU: Implement texture format R32F.

---
 .../renderer_opengl/gl_rasterizer_cache.cpp       |  7 +++++--
 .../renderer_opengl/gl_rasterizer_cache.h         | 15 +++++++++++----
 src/video_core/textures/decoders.cpp              |  3 +++
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 8f99864a0..1d3aff97b 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -110,6 +110,7 @@ static constexpr std::array<FormatTuple, SurfaceParams::MaxPixelFormat> tex_form
     {GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE, ComponentType::UNorm, false}, // BGRA8
     {GL_RGBA32F, GL_RGBA, GL_FLOAT, ComponentType::Float, false},       // RGBA32F
     {GL_RG32F, GL_RG, GL_FLOAT, ComponentType::Float, false},           // RG32F
+    {GL_R32F, GL_RED, GL_FLOAT, ComponentType::Float, false},           // R32F
 
     // DepthStencil formats
     {GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, ComponentType::UNorm,
@@ -203,8 +204,9 @@ static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr),
         MortonCopy<true, PixelFormat::BC7U>,         MortonCopy<true, PixelFormat::ASTC_2D_4X4>,
         MortonCopy<true, PixelFormat::G8R8>,         MortonCopy<true, PixelFormat::BGRA8>,
         MortonCopy<true, PixelFormat::RGBA32F>,      MortonCopy<true, PixelFormat::RG32F>,
-        MortonCopy<true, PixelFormat::Z24S8>,        MortonCopy<true, PixelFormat::S8Z24>,
-        MortonCopy<true, PixelFormat::Z32F>,         MortonCopy<true, PixelFormat::Z16>,
+        MortonCopy<true, PixelFormat::R32F>,         MortonCopy<true, PixelFormat::Z24S8>,
+        MortonCopy<true, PixelFormat::S8Z24>,        MortonCopy<true, PixelFormat::Z32F>,
+        MortonCopy<true, PixelFormat::Z16>,
 };
 
 static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr),
@@ -229,6 +231,7 @@ static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr),
         MortonCopy<false, PixelFormat::BGRA8>,
         MortonCopy<false, PixelFormat::RGBA32F>,
         MortonCopy<false, PixelFormat::RG32F>,
+        MortonCopy<false, PixelFormat::R32F>,
         MortonCopy<false, PixelFormat::Z24S8>,
         MortonCopy<false, PixelFormat::S8Z24>,
         MortonCopy<false, PixelFormat::Z32F>,
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.h b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
index 23efbe67c..800d239d9 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
@@ -40,14 +40,15 @@ struct SurfaceParams {
         BGRA8 = 15,
         RGBA32F = 16,
         RG32F = 17,
+        R32F = 18,
 
         MaxColorFormat,
 
         // DepthStencil formats
-        Z24S8 = 18,
-        S8Z24 = 19,
-        Z32F = 20,
-        Z16 = 21,
+        Z24S8 = 19,
+        S8Z24 = 20,
+        Z32F = 21,
+        Z16 = 22,
 
         MaxDepthStencilFormat,
 
@@ -103,6 +104,7 @@ struct SurfaceParams {
             1, // BGRA8
             1, // RGBA32F
             1, // RG32F
+            1, // R32F
             1, // Z24S8
             1, // S8Z24
             1, // Z32F
@@ -136,6 +138,7 @@ struct SurfaceParams {
             32,  // BGRA8
             128, // RGBA32F
             64,  // RG32F
+            32,  // R32F
             32,  // Z24S8
             32,  // S8Z24
             32,  // Z32F
@@ -223,6 +226,8 @@ struct SurfaceParams {
             UNREACHABLE();
         case Tegra::Texture::TextureFormat::R32_G32:
             return PixelFormat::RG32F;
+        case Tegra::Texture::TextureFormat::R32:
+            return PixelFormat::R32F;
         case Tegra::Texture::TextureFormat::DXT1:
             return PixelFormat::DXT1;
         case Tegra::Texture::TextureFormat::DXT23:
@@ -283,6 +288,8 @@ struct SurfaceParams {
             return Tegra::Texture::TextureFormat::R32_G32_B32_A32;
         case PixelFormat::RG32F:
             return Tegra::Texture::TextureFormat::R32_G32;
+        case PixelFormat::R32F:
+            return Tegra::Texture::TextureFormat::R32;
         default:
             LOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
             UNREACHABLE();
diff --git a/src/video_core/textures/decoders.cpp b/src/video_core/textures/decoders.cpp
index e5e9e1898..cda2646ad 100644
--- a/src/video_core/textures/decoders.cpp
+++ b/src/video_core/textures/decoders.cpp
@@ -61,6 +61,7 @@ u32 BytesPerPixel(TextureFormat format) {
     case TextureFormat::A8R8G8B8:
     case TextureFormat::A2B10G10R10:
     case TextureFormat::BF10GF11RF11:
+    case TextureFormat::R32:
         return 4;
     case TextureFormat::A1B5G5R5:
     case TextureFormat::B5G6R5:
@@ -121,6 +122,7 @@ std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width,
     case TextureFormat::R16_G16_B16_A16:
     case TextureFormat::R32_G32_B32_A32:
     case TextureFormat::R32_G32:
+    case TextureFormat::R32:
     case TextureFormat::BF10GF11RF11:
     case TextureFormat::ASTC_2D_4X4:
         CopySwizzledData(width, height, bytes_per_pixel, bytes_per_pixel, data,
@@ -178,6 +180,7 @@ std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat
     case TextureFormat::BF10GF11RF11:
     case TextureFormat::R32_G32_B32_A32:
     case TextureFormat::R32_G32:
+    case TextureFormat::R32:
         // TODO(Subv): For the time being just forward the same data without any decoding.
         rgba_data = texture_data;
         break;