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Pica: Fix A4, IA4 and IA8 texture formats.

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Both IA4 and IA8 had their component order mixed up. Additionally, IA4 used the wrong number of nibbles per texel. A4 skipped every second texel.
This commit is contained in:
Tony Wasserka 2014-12-21 02:51:48 +01:00
parent b7a48c422a
commit 632655e292
1 changed files with 7 additions and 13 deletions
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20
src/video_core/debug_utils/debug_utils.cpp
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@ -389,13 +389,11 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
{ {
const u8* source_ptr = source + offset * 2; const u8* source_ptr = source + offset * 2;
// TODO: component order not verified
if (disable_alpha) { if (disable_alpha) {
// Show intensity as red, alpha as green // Show intensity as red, alpha as green
return { source_ptr[0], source_ptr[1], 0, 255 }; return { source_ptr[1], source_ptr[0], 0, 255 };
} else { } else {
return { source_ptr[0], source_ptr[0], source_ptr[0], source_ptr[1]}; return { source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0]};
} }
} }
@ -418,12 +416,10 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA4: case Regs::TextureFormat::IA4:
{ {
const u8* source_ptr = source + offset / 2; const u8* source_ptr = source + offset;
// TODO: component order not verified u8 i = ((*source_ptr) & 0xF0) >> 4;
u8 a = (*source_ptr) & 0xF;
u8 i = (*source_ptr) & 0xF;
u8 a = ((*source_ptr) & 0xF0) >> 4;
a |= a << 4; a |= a << 4;
i |= i << 4; i |= i << 4;
@ -439,15 +435,13 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
{ {
const u8* source_ptr = source + offset / 2; const u8* source_ptr = source + offset / 2;
// TODO: component order not verified
u8 a = (coarse_x % 2) ? ((*source_ptr)&0xF) : (((*source_ptr) & 0xF0) >> 4); u8 a = (coarse_x % 2) ? ((*source_ptr)&0xF) : (((*source_ptr) & 0xF0) >> 4);
a |= a << 4; a |= a << 4;
if (disable_alpha) { if (disable_alpha) {
return { *source_ptr, *source_ptr, *source_ptr, 255 }; return { a, a, a, 255 };
} else { } else {
return { 0, 0, 0, *source_ptr }; return { 0, 0, 0, a };
} }
} }