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softgpu: Correct accuracy on fast path modulate.

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Unknown W. Brackets 2021-12-05 13:10:18 -08:00
parent 73460f7461
commit 154bb53744
1 changed files with 19 additions and 19 deletions
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38
GPU/Software/RasterizerRectangle.cpp
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@ -45,34 +45,34 @@ inline void DrawSinglePixel5551(u16 *pixel, const u32 color_in, const PixelFuncI
*pixel = RGBA8888ToRGBA5551(new_color);
}
static inline Vec4<int> ModulateRGBA(const Vec4<int>& prim_color, const Vec4<int>& texcolor) {
Vec3<int> out_rgb;
int out_a;
static inline Vec4IntResult SOFTRAST_CALL ModulateRGBA(Vec4IntArg prim_in, Vec4IntArg texcolor_in) {
Vec4<int> out;
Vec4<int> prim_color = prim_in;
Vec4<int> texcolor = texcolor_in;
#if defined(_M_SSE)
// We can be accurate up to 24 bit integers, should be enough.
const __m128 p = _mm_cvtepi32_ps(prim_color.ivec);
const __m128 t = _mm_cvtepi32_ps(texcolor.ivec);
const __m128 b = _mm_mul_ps(p, t);
// Modulate weights slightly on the tex color, by adding one to prim and dividing by 256.
const __m128i p = _mm_slli_epi16(_mm_packs_epi32(prim_color.ivec, prim_color.ivec), 4);
const __m128i pboost = _mm_add_epi16(p, _mm_set1_epi16(1 << 4));
__m128i t = _mm_slli_epi16(_mm_packs_epi32(texcolor.ivec, texcolor.ivec), 4);
if (gstate.isColorDoublingEnabled()) {
// We double right here, only for modulate. Other tex funcs do not color double.
const __m128 doubleColor = _mm_setr_ps(2.0f / 255.0f, 2.0f / 255.0f, 2.0f / 255.0f, 1.0f / 255.0f);
out_rgb.ivec = _mm_cvtps_epi32(_mm_mul_ps(b, doubleColor));
} else {
out_rgb.ivec = _mm_cvtps_epi32(_mm_mul_ps(b, _mm_set_ps1(1.0f / 255.0f)));
const __m128i amask = _mm_set_epi16(-1, 0, 0, 0, -1, 0, 0, 0);
const __m128i a = _mm_and_si128(t, amask);
const __m128i rgb = _mm_andnot_si128(amask, t);
t = _mm_or_si128(_mm_slli_epi16(rgb, 1), a);
}
return Vec4<int>(out_rgb.ivec);
const __m128i b = _mm_mulhi_epi16(pboost, t);
out.ivec = _mm_unpacklo_epi16(b, _mm_setzero_si128());
#else
if (gstate.isColorDoublingEnabled()) {
out_rgb = (prim_color.rgb() * texcolor.rgb() * 2) / 255;
Vec4<int> tex = texcolor * Vec4<int>(2, 2, 2, 1);
out = ((prim_color + Vec4<int>::AssignToAll(1)) * tex) / 256;
} else {
out_rgb = prim_color.rgb() * texcolor.rgb() / 255;
out = (prim_color + Vec4<int>::AssignToAll(1)) * texcolor / 256;
}
out_a = (prim_color.a() * texcolor.a() / 255);
#endif
return Vec4<int>(out_rgb.r(), out_rgb.g(), out_rgb.b(), out_a);
return ToVec4IntResult(out);
}
void DrawSprite(const VertexData& v0, const VertexData& v1) {
@ -172,7 +172,7 @@ void DrawSprite(const VertexData& v0, const VertexData& v1) {
for (int x = pos0.x; x < pos1.x; x++) {
Vec4<int> prim_color = v1.color0;
Vec4<int> tex_color = nearestFunc(s, t, texptr, texbufw, 0);
prim_color = ModulateRGBA(prim_color, tex_color);
prim_color = Vec4<int>(ModulateRGBA(ToVec4IntArg(prim_color), ToVec4IntArg(tex_color)));
if (prim_color.a() > 0) {
DrawSinglePixel5551(pixel, prim_color.ToRGBA(), pixelID);
}