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Fix indirect textures when format is not ITF_8

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This commit is contained in:
Pokechu22
2021-07-07 16:35:50 -07:00
parent cfcc994f6c
commit 2feced2e33
3 changed files with 44 additions and 39 deletions
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35
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -1006,17 +1006,22 @@ static void WriteStage(ShaderCode& out, const pixel_shader_uid_data* uid_data, i
"z",
};
// 0b11111000, 0b11100000, 0b11110000, 0b11111000
static constexpr std::array<const char*, 4> tev_ind_alpha_mask{
"248",
"224",
"240",
"248",
// According to libogc, the bump alpha value is 5 bits, and comes from the bottom bits of the
// component byte, except in the case of ITF_8, which presumably uses the top bits with a
// mask.
// https://github.com/devkitPro/libogc/blob/bd24a9b3f59502f9b30d6bac0ae35fc485045f78/gc/ogc/gx.h#L3038-L3041
// https://github.com/devkitPro/libogc/blob/bd24a9b3f59502f9b30d6bac0ae35fc485045f78/gc/ogc/gx.h#L790-L800
static constexpr std::array<char, 4> tev_ind_alpha_shift{
'0', // ITF_8: 0bXXXXXYYY -> 0bXXXXX000? No shift?
'5', // ITF_5: 0bIIIIIAAA -> 0bAAA00000, shift of 5
'4', // ITF_4: 0bIIIIAAAA -> 0bAAAA0000, shift of 4
'3', // ITF_3: 0bIIIAAAAA -> 0bAAAAA000, shift of 3
};
out.Write("alphabump = iindtex{}.{} & {};\n", tevind.bt.Value(),
out.Write("alphabump = (iindtex{}.{} << {}) & 248;\n", tevind.bt.Value(),
tev_ind_alpha_sel[u32(tevind.bs.Value())],
tev_ind_alpha_mask[u32(tevind.fmt.Value())]);
tev_ind_alpha_shift[u32(tevind.fmt.Value())]);
}
else
{
@ -1026,14 +1031,14 @@ static void WriteStage(ShaderCode& out, const pixel_shader_uid_data* uid_data, i
if (has_ind_stage && tevind.matrix_index != IndMtxIndex::Off)
{
// format
static constexpr std::array<const char*, 4> tev_ind_fmt_mask{
"255",
"31",
"15",
"7",
static constexpr std::array<char, 4> tev_ind_fmt_shift{
'0', // ITF_8: 0bXXXXXXXX -> 0bXXXXXXXX, no shift
'3', // ITF_5: 0bIIIIIAAA -> 0b000IIIII, shift of 3
'4', // ITF_4: 0bIIIIAAAA -> 0b0000IIII, shift of 4
'5', // ITF_3: 0bIIIAAAAA -> 0b00000III, shift of 5
};
out.Write("\tint3 iindtevcrd{} = iindtex{} & {};\n", n, tevind.bt.Value(),
tev_ind_fmt_mask[u32(tevind.fmt.Value())]);
out.Write("\tint3 iindtevcrd{} = iindtex{} >> {};\n", n, tevind.bt.Value(),
tev_ind_fmt_shift[u32(tevind.fmt.Value())]);
// bias - TODO: Check if this needs to be this complicated...
// indexed by bias