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Added missing changes in shader include files for dithering

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This commit is contained in:
Mr-Wiseguy 2024-05-01 04:19:46 -04:00
parent 92cf3845a0
commit 611d26a7c8
2 changed files with 57 additions and 10 deletions
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8
src/shaders/FbCommon.hlsli
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@ -103,10 +103,10 @@ uint Float4ToUINT8(float4 i, uint fmt, bool oddColumn) {
}
}
uint Float4ToUINT16(float4 i, uint fmt) {
uint Float4ToUINT16(float4 i, uint fmt, uint dither) {
switch (fmt) {
case G_IM_FMT_RGBA:
return Float4ToRGBA16(i);
return Float4ToRGBA16(i, dither);
// TODO
case G_IM_FMT_CI:
return 0;
@ -141,7 +141,7 @@ uint Float4ToUINT32(float4 i, uint fmt) {
}
}
uint Float4ToUINT(float4 i, uint siz, uint fmt, bool oddColumn) {
uint Float4ToUINT(float4 i, uint siz, uint fmt, bool oddColumn, uint dither) {
switch (siz) {
// TODO
case G_IM_SIZ_4b:
@ -149,7 +149,7 @@ uint Float4ToUINT(float4 i, uint siz, uint fmt, bool oddColumn) {
case G_IM_SIZ_8b:
return Float4ToUINT8(i, fmt, oddColumn);
case G_IM_SIZ_16b:
return Float4ToUINT16(i, fmt);
return Float4ToUINT16(i, fmt, dither);
case G_IM_SIZ_32b:
return Float4ToUINT32(i, fmt);
// Invalid pixel size.

55
src/shaders/Formats.hlsli
View File

@ -6,6 +6,53 @@
// Color conversion formulas sourced from Tharo.
static const uint DitherPatternBayer[16] = {
0, 4, 1, 5,
4, 0, 5, 1,
3, 7, 2, 6,
7, 3, 6, 2
};
static const uint DitherPatternMagicSquare[16] = {
0, 6, 1, 7,
4, 2, 5, 3,
3, 5, 2, 4,
7, 1, 6, 0
};
uint DitherPatternIndex(uint2 coord) {
return ((coord.y & 3) << 2) + (coord.x & 3);
}
uint DitherPatternValue(uint pattern, uint2 coord, uint randomSeed) {
switch (pattern) {
case 0: // MAGICSQ
return DitherPatternMagicSquare[DitherPatternIndex(coord)];
case 1: // BAYER
return DitherPatternBayer[DitherPatternIndex(coord)];
case 2: // NOISE
return randomSeed & 7;
case 3: // DISABLE
default:
return 0;
}
}
uint AlphaDitherValue(uint colorDither, uint alphaDither, uint2 coord, uint randomSeed) {
// Only the first bit of color dither is used here for pattern selection.
switch (alphaDither) {
case 0: // PATTERN
return DitherPatternValue(colorDither & 1, coord, randomSeed);
case 1: // NOTPATTERN
return (~DitherPatternValue(colorDither & 1, coord, randomSeed)) & 7;
case 2: // NOISE
return randomSeed & 7;
case 3: // DISABLE
default:
return 0;
}
}
float4 I4ToFloat4(uint i4) {
uint i = (i4 << 4) | i4;
return i / 255.0f;
@ -45,15 +92,15 @@ float4 RGBA16ToFloat4(uint rgba16) {
);
}
uint Float4ToRGBA16(float4 i) {
uint Float4ToRGBA16(float4 i, uint dither) {
uint r = round(clamp(i.r * 255.0f, 0.0f, 255.0f));
uint g = round(clamp(i.g * 255.0f, 0.0f, 255.0f));
uint b = round(clamp(i.b * 255.0f, 0.0f, 255.0f));
int cvgModulo = round(i.a * 255.0f) % 8;
uint a = (cvgModulo & 0x4) ? 1 : 0;
r = r >> 3;
g = g >> 3;
b = b >> 3;
r = min(r + dither, 255) >> 3;
g = min(g + dither, 255) >> 3;
b = min(b + dither, 255) >> 3;
return (r << 11) | (g << 6) | (b << 1) | a;
}