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Pica: Merge texture lookup logic for DebugUtils and Rasterizer.

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This effectively adds support for a lot texture formats in the rasterizer.
This commit is contained in:
Tony Wasserka 2014-12-06 21:52:21 +01:00
parent 0fba1d48a6
commit 3df88d59b0
4 changed files with 41 additions and 55 deletions
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42
src/video_core/debug_utils/debug_utils.cpp
View file

@ -356,9 +356,29 @@ std::unique_ptr<PicaTrace> FinishPicaTracing()
return std::move(ret);
}
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info) {
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info, bool disable_alpha) {
// Cf. rasterizer code for an explanation of this algorithm.
// 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.
// texels are laid out in a 2x2 subtile like this:
// 2 3
// 0 1
//
// The full 8x8 tile has the texels arranged like this:
//
// 42 43 46 47 58 59 62 63
// 40 41 44 45 56 57 60 61
// 34 35 38 39 50 51 54 55
// 32 33 36 37 48 49 52 53
// 10 11 14 15 26 27 30 31
// 08 09 12 13 24 25 28 29
// 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;
@ -379,7 +399,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::RGBA8:
{
const u8* source_ptr = source + coarse_x * block_height * 4 + coarse_y * info.stride + texel_index_within_tile * 4;
return { source_ptr[3], source_ptr[2], source_ptr[1], 255 };
return { source_ptr[3], source_ptr[2], source_ptr[1], disable_alpha ? 255 : source_ptr[0] };
}
case Regs::TextureFormat::RGB8:
@ -394,8 +414,8 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
u8 r = (source_ptr >> 11) & 0x1F;
u8 g = ((source_ptr) >> 6) & 0x1F;
u8 b = (source_ptr >> 1) & 0x1F;
u8 a = 1;
return Math::MakeVec<u8>((r << 3) | (r >> 2), (g << 3) | (g >> 2), (b << 3) | (b >> 2), a * 255);
u8 a = source_ptr & 1;
return Math::MakeVec<u8>((r << 3) | (r >> 2), (g << 3) | (g >> 2), (b << 3) | (b >> 2), disable_alpha ? 255 : (a * 255));
}
case Regs::TextureFormat::RGBA4:
@ -404,16 +424,24 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
u8 r = source_ptr[1] >> 4;
u8 g = source_ptr[1] & 0xFF;
u8 b = source_ptr[0] >> 4;
u8 a = source_ptr[0] & 0xFF;
r = (r << 4) | r;
g = (g << 4) | g;
b = (b << 4) | b;
return { r, g, b, 255 };
a = (a << 4) | a;
return { r, g, b, disable_alpha ? 255 : a };
}
case Regs::TextureFormat::A8:
{
const u8* source_ptr = source + coarse_x * block_height + coarse_y * info.stride + texel_index_within_tile;
return { *source_ptr, *source_ptr, *source_ptr, 255 };
// TODO: Better control this...
if (disable_alpha) {
return { *source_ptr, *source_ptr, *source_ptr, 255 };
} else {
return { 0, 0, 0, *source_ptr };
}
}
default:

3
src/video_core/debug_utils/debug_utils.h
View file

@ -202,7 +202,8 @@ struct TextureInfo {
const Pica::Regs::TextureFormat& format);
};
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info);
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info,
bool disable_alpha = false);
void DumpTexture(const Pica::Regs::TextureConfig& texture_config, u8* data);
void DumpTevStageConfig(const std::array<Pica::Regs::TevStageConfig,6>& stages);