Implement Block Linear copies in Kepler Memory.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/video_core/textures/decoders.cpp b/src/video_core/textures/decoders.cpp
index 995d0e068..6e02a6407 100644
--- a/src/video_core/textures/decoders.cpp
+++ b/src/video_core/textures/decoders.cpp
@@ -288,6 +288,27 @@ void UnswizzleSubrect(u32 subrect_width, u32 subrect_height, u32 dest_pitch, u32
     }
 }
 
+void SwizzleKepler(u32 width, u32 height, u32 dst_x, u32 dst_y, u32 block_height,
+                   std::size_t copy_size, u8* source_data, u8* swizzle_data) {
+    const u32 image_width_in_gobs{(width + gob_size_x - 1) / gob_size_x};
+    std::size_t count = 0;
+    for (u32 y = dst_y; y < height && count < copy_size; ++y) {
+        const u32 gob_address_y =
+            (y / (gob_size_y * block_height)) * gob_size * block_height * image_width_in_gobs +
+            ((y % (gob_size_y * block_height)) / gob_size_y) * gob_size;
+        const auto& table = legacy_swizzle_table[y % gob_size_y];
+        for (u32 x = dst_x; x < width && count < copy_size; ++x) {
+            const u32 gob_address = gob_address_y + (x / gob_size_x) * gob_size * block_height;
+            const u32 swizzled_offset = gob_address + table[x % gob_size_x];
+            const u8* source_line = source_data + count;
+            u8* dest_addr = swizzle_data + swizzled_offset;
+            count++;
+
+            std::memcpy(dest_addr, source_line, 1);
+        }
+    }
+}
+
 std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat format, u32 width,
                               u32 height) {
     std::vector<u8> rgba_data;