summaryrefslogtreecommitdiffstats
path: root/src/video_core
diff options
context:
space:
mode:
authorYuri Kunde Schlesner <yuriks@yuriks.net>2014-12-23 15:27:56 +0100
committerYuri Kunde Schlesner <yuriks@yuriks.net>2014-12-29 05:08:11 +0100
commitfe186d3a598837ba7337f06399dfb8ae7930a070 (patch)
tree42989cfcde1ede0a886ad631cf84de534cf176dd /src/video_core
parentRasterizer: Common sub-expression elimination (diff)
downloadyuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.tar
yuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.tar.gz
yuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.tar.bz2
yuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.tar.lz
yuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.tar.xz
yuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.tar.zst
yuzu-fe186d3a598837ba7337f06399dfb8ae7930a070.zip
Diffstat (limited to 'src/video_core')
-rw-r--r--src/video_core/debug_utils/debug_utils.cpp51
1 files changed, 24 insertions, 27 deletions
diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp
index 328386b7e..5921185a6 100644
--- a/src/video_core/debug_utils/debug_utils.cpp
+++ b/src/video_core/debug_utils/debug_utils.cpp
@@ -304,7 +304,6 @@ std::unique_ptr<PicaTrace> FinishPicaTracing()
}
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info, bool disable_alpha) {
-
// Images are split into 8x8 tiles. Each tile is composed of four 4x4 subtiles each
// of which is composed of four 2x2 subtiles each of which is composed of four texels.
// Each structure is embedded into the next-bigger one in a diagonal pattern, e.g.
@@ -323,41 +322,39 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
// 02 03 06 07 18 19 22 23
// 00 01 04 05 16 17 20 21
- // TODO(neobrain): Not sure if this swizzling pattern is used for all textures.
- // To be flexible in case different but similar patterns are used, we keep this
- // somewhat inefficient code around for now.
- int texel_index_within_tile = 0;
- for (int block_size_index = 0; block_size_index < 3; ++block_size_index) {
- int sub_tile_width = 1 << block_size_index;
- int sub_tile_height = 1 << block_size_index;
-
- int sub_tile_index = (x & sub_tile_width) << block_size_index;
- sub_tile_index += 2 * ((y & sub_tile_height) << block_size_index);
- texel_index_within_tile += sub_tile_index;
- }
+ const unsigned int block_width = 8;
+ const unsigned int block_height = 8;
+
+ const unsigned int coarse_x = x & ~7;
+ const unsigned int coarse_y = y & ~7;
- const int block_width = 8;
- const int block_height = 8;
+ // Interleave the lower 3 bits of each coordinate to get the intra-block offsets, which are
+ // arranged in a Z-order curve. More details on the bit manipulation at:
+ // https://fgiesen.wordpress.com/2009/12/13/decoding-morton-codes/
+ unsigned int i = (x | (y << 8)) & 0x0707; // ---- -210
+ i = (i ^ (i << 2)) & 0x1313; // ---2 --10
+ i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0
+ i = (i | (i >> 7)) & 0x3F;
- int coarse_x = (x / block_width) * block_width;
- int coarse_y = (y / block_height) * block_height;
+ source += coarse_y * info.stride;
+ const unsigned int offset = coarse_x * block_height + i;
switch (info.format) {
case Regs::TextureFormat::RGBA8:
{
- const u8* source_ptr = source + coarse_x * block_height * 4 + coarse_y * info.stride + texel_index_within_tile * 4;
+ const u8* source_ptr = source + offset * 4;
return { source_ptr[3], source_ptr[2], source_ptr[1], disable_alpha ? (u8)255 : source_ptr[0] };
}
case Regs::TextureFormat::RGB8:
{
- const u8* source_ptr = source + coarse_x * block_height * 3 + coarse_y * info.stride + texel_index_within_tile * 3;
+ const u8* source_ptr = source + offset * 3;
return { source_ptr[2], source_ptr[1], source_ptr[0], 255 };
}
case Regs::TextureFormat::RGBA5551:
{
- const u16 source_ptr = *(const u16*)(source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2);
+ const u16 source_ptr = *(const u16*)(source + offset * 2);
u8 r = (source_ptr >> 11) & 0x1F;
u8 g = ((source_ptr) >> 6) & 0x1F;
u8 b = (source_ptr >> 1) & 0x1F;
@@ -367,7 +364,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::RGB565:
{
- const u16 source_ptr = *(const u16*)(source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2);
+ const u16 source_ptr = *(const u16*)(source + offset * 2);
u8 r = (source_ptr >> 11) & 0x1F;
u8 g = ((source_ptr) >> 5) & 0x3F;
u8 b = (source_ptr) & 0x1F;
@@ -376,7 +373,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::RGBA4:
{
- const u8* source_ptr = source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2;
+ const u8* source_ptr = source + offset * 2;
u8 r = source_ptr[1] >> 4;
u8 g = source_ptr[1] & 0xFF;
u8 b = source_ptr[0] >> 4;
@@ -390,7 +387,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA8:
{
- const u8* source_ptr = source + coarse_x * block_height * 2 + coarse_y * info.stride + texel_index_within_tile * 2;
+ const u8* source_ptr = source + offset * 2;
// TODO: component order not verified
@@ -404,13 +401,13 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::I8:
{
- const u8* source_ptr = source + coarse_x * block_height + coarse_y * info.stride + texel_index_within_tile;
+ const u8* source_ptr = source + offset;
return { *source_ptr, *source_ptr, *source_ptr, 255 };
}
case Regs::TextureFormat::A8:
{
- const u8* source_ptr = source + coarse_x * block_height + coarse_y * info.stride + texel_index_within_tile;
+ const u8* source_ptr = source + offset;
if (disable_alpha) {
return { *source_ptr, *source_ptr, *source_ptr, 255 };
@@ -421,7 +418,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA4:
{
- const u8* source_ptr = source + coarse_x * block_height / 2 + coarse_y * info.stride + texel_index_within_tile / 2;
+ const u8* source_ptr = source + offset / 2;
// TODO: component order not verified
@@ -440,7 +437,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::A4:
{
- const u8* source_ptr = source + coarse_x * block_height / 2 + coarse_y * info.stride + texel_index_within_tile / 2;
+ const u8* source_ptr = source + offset / 2;
// TODO: component order not verified