From 4cc1e180eccb4fa4df484badf1eaf60e6728752f Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Tue, 24 Jul 2018 13:39:16 -0500
Subject: [PATCH] GPU: Implemented the R16 and R16F texture formats.

---
 .../renderer_opengl/gl_rasterizer_cache.cpp   |  7 ++++-
 .../renderer_opengl/gl_rasterizer_cache.h     | 27 ++++++++++++++++---
 src/video_core/textures/decoders.cpp          |  3 +++
 3 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 1d3aff97b..0f5006383 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -111,6 +111,8 @@ static constexpr std::array<FormatTuple, SurfaceParams::MaxPixelFormat> tex_form
     {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
+    {GL_R16F, GL_RED, GL_HALF_FLOAT, ComponentType::Float, false},      // R16F
+    {GL_R16, GL_RED, GL_UNSIGNED_SHORT, ComponentType::UNorm, false},   // R16UNORM
 
     // DepthStencil formats
     {GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, ComponentType::UNorm,
@@ -204,7 +206,8 @@ 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::R32F>,         MortonCopy<true, PixelFormat::Z24S8>,
+        MortonCopy<true, PixelFormat::R32F>,         MortonCopy<true, PixelFormat::R16F>,
+        MortonCopy<true, PixelFormat::R16UNORM>,     MortonCopy<true, PixelFormat::Z24S8>,
         MortonCopy<true, PixelFormat::S8Z24>,        MortonCopy<true, PixelFormat::Z32F>,
         MortonCopy<true, PixelFormat::Z16>,
 };
@@ -232,6 +235,8 @@ static constexpr std::array<void (*)(u32, u32, u32, u8*, Tegra::GPUVAddr),
         MortonCopy<false, PixelFormat::RGBA32F>,
         MortonCopy<false, PixelFormat::RG32F>,
         MortonCopy<false, PixelFormat::R32F>,
+        MortonCopy<false, PixelFormat::R16F>,
+        MortonCopy<false, PixelFormat::R16UNORM>,
         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 800d239d9..e1d3670d9 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
@@ -41,14 +41,16 @@ struct SurfaceParams {
         RGBA32F = 16,
         RG32F = 17,
         R32F = 18,
+        R16F = 19,
+        R16UNORM = 20,
 
         MaxColorFormat,
 
         // DepthStencil formats
-        Z24S8 = 19,
-        S8Z24 = 20,
-        Z32F = 21,
-        Z16 = 22,
+        Z24S8 = 21,
+        S8Z24 = 22,
+        Z32F = 23,
+        Z16 = 24,
 
         MaxDepthStencilFormat,
 
@@ -105,6 +107,8 @@ struct SurfaceParams {
             1, // RGBA32F
             1, // RG32F
             1, // R32F
+            1, // R16F
+            1, // R16UNORM
             1, // Z24S8
             1, // S8Z24
             1, // Z32F
@@ -139,6 +143,8 @@ struct SurfaceParams {
             128, // RGBA32F
             64,  // RG32F
             32,  // R32F
+            16,  // R16F
+            16,  // R16UNORM
             32,  // Z24S8
             32,  // S8Z24
             32,  // Z32F
@@ -226,6 +232,16 @@ struct SurfaceParams {
             UNREACHABLE();
         case Tegra::Texture::TextureFormat::R32_G32:
             return PixelFormat::RG32F;
+        case Tegra::Texture::TextureFormat::R16:
+            switch (component_type) {
+            case Tegra::Texture::ComponentType::FLOAT:
+                return PixelFormat::R16F;
+            case Tegra::Texture::ComponentType::UNORM:
+                return PixelFormat::R16UNORM;
+            }
+            LOG_CRITICAL(HW_GPU, "Unimplemented component_type={}",
+                         static_cast<u32>(component_type));
+            UNREACHABLE();
         case Tegra::Texture::TextureFormat::R32:
             return PixelFormat::R32F;
         case Tegra::Texture::TextureFormat::DXT1:
@@ -290,6 +306,9 @@ struct SurfaceParams {
             return Tegra::Texture::TextureFormat::R32_G32;
         case PixelFormat::R32F:
             return Tegra::Texture::TextureFormat::R32;
+        case PixelFormat::R16F:
+        case PixelFormat::R16UNORM:
+            return Tegra::Texture::TextureFormat::R16;
         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 cda2646ad..970c06e71 100644
--- a/src/video_core/textures/decoders.cpp
+++ b/src/video_core/textures/decoders.cpp
@@ -66,6 +66,7 @@ u32 BytesPerPixel(TextureFormat format) {
     case TextureFormat::A1B5G5R5:
     case TextureFormat::B5G6R5:
     case TextureFormat::G8R8:
+    case TextureFormat::R16:
         return 2;
     case TextureFormat::R8:
         return 1;
@@ -123,6 +124,7 @@ std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width,
     case TextureFormat::R32_G32_B32_A32:
     case TextureFormat::R32_G32:
     case TextureFormat::R32:
+    case TextureFormat::R16:
     case TextureFormat::BF10GF11RF11:
     case TextureFormat::ASTC_2D_4X4:
         CopySwizzledData(width, height, bytes_per_pixel, bytes_per_pixel, data,
@@ -181,6 +183,7 @@ std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat
     case TextureFormat::R32_G32_B32_A32:
     case TextureFormat::R32_G32:
     case TextureFormat::R32:
+    case TextureFormat::R16:
         // TODO(Subv): For the time being just forward the same data without any decoding.
         rgba_data = texture_data;
         break;