From 6b63aaa5b4f55621117e27c6b80979908c255e75 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Sun, 15 Apr 2018 19:53:15 -0500
Subject: [PATCH] GPU: Allow using a configurable block height when unswizzling
 textures.

---
 .../renderer_opengl/gl_rasterizer_cache.cpp           | 11 ++++++++++-
 src/video_core/textures/decoders.cpp                  |  9 ++++-----
 src/video_core/textures/decoders.h                    |  3 ++-
 src/video_core/textures/texture.h                     |  7 +++++++
 4 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 213b20a21a..9d005936d3 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -1041,9 +1041,18 @@ Surface RasterizerCacheOpenGL::GetTextureSurface(const Tegra::Texture::FullTextu
     params.height = config.tic.Height();
     params.is_tiled = config.tic.IsTiled();
     params.pixel_format = SurfaceParams::PixelFormatFromTextureFormat(config.tic.format);
+
+    if (config.tic.IsTiled()) {
+        params.block_height = config.tic.BlockHeight();
+    } else {
+        // Use the texture-provided stride value if the texture isn't tiled.
+        params.stride = params.PixelsInBytes(config.tic.Pitch());
+    }
+
     params.UpdateParams();
 
-    if (config.tic.Width() % 8 != 0 || config.tic.Height() % 8 != 0) {
+    if (config.tic.Width() % 8 != 0 || config.tic.Height() % 8 != 0 ||
+        params.stride != params.width) {
         Surface src_surface;
         MathUtil::Rectangle<u32> rect;
         std::tie(src_surface, rect) = GetSurfaceSubRect(params, ScaleMatch::Ignore, true);
diff --git a/src/video_core/textures/decoders.cpp b/src/video_core/textures/decoders.cpp
index 2e87281ebc..9c2a10d2e9 100644
--- a/src/video_core/textures/decoders.cpp
+++ b/src/video_core/textures/decoders.cpp
@@ -56,23 +56,22 @@ u32 BytesPerPixel(TextureFormat format) {
     }
 }
 
-std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width, u32 height) {
+std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width, u32 height,
+                                 u32 block_height) {
     u8* data = Memory::GetPointer(address);
     u32 bytes_per_pixel = BytesPerPixel(format);
 
-    static constexpr u32 DefaultBlockHeight = 16;
-
     std::vector<u8> unswizzled_data(width * height * bytes_per_pixel);
 
     switch (format) {
     case TextureFormat::DXT1:
         // In the DXT1 format, each 4x4 tile is swizzled instead of just individual pixel values.
         CopySwizzledData(width / 4, height / 4, bytes_per_pixel, bytes_per_pixel, data,
-                         unswizzled_data.data(), true, DefaultBlockHeight);
+                         unswizzled_data.data(), true, block_height);
         break;
     case TextureFormat::A8R8G8B8:
         CopySwizzledData(width, height, bytes_per_pixel, bytes_per_pixel, data,
-                         unswizzled_data.data(), true, DefaultBlockHeight);
+                         unswizzled_data.data(), true, block_height);
         break;
     default:
         UNIMPLEMENTED_MSG("Format not implemented");
diff --git a/src/video_core/textures/decoders.h b/src/video_core/textures/decoders.h
index 0c21694ff2..a700911cf7 100644
--- a/src/video_core/textures/decoders.h
+++ b/src/video_core/textures/decoders.h
@@ -14,7 +14,8 @@ namespace Texture {
 /**
  * Unswizzles a swizzled texture without changing its format.
  */
-std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width, u32 height);
+std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width, u32 height,
+                                 u32 block_height = TICEntry::DefaultBlockHeight);
 
 /**
  * Decodes an unswizzled texture into a A8R8G8B8 texture.
diff --git a/src/video_core/textures/texture.h b/src/video_core/textures/texture.h
index 58cbb2115d..09d2317e00 100644
--- a/src/video_core/textures/texture.h
+++ b/src/video_core/textures/texture.h
@@ -105,6 +105,13 @@ struct TICEntry {
         return height_minus_1 + 1;
     }
 
+    u32 BlockHeight() const {
+        ASSERT(header_version == TICHeaderVersion::BlockLinear ||
+               header_version == TICHeaderVersion::BlockLinearColorKey);
+        // The block height is stored in log2 format.
+        return 1 << block_height;
+    }
+
     bool IsTiled() const {
         return header_version == TICHeaderVersion::BlockLinear ||
                header_version == TICHeaderVersion::BlockLinearColorKey;