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godot/modules/betsy/bc6h.glsl
BlueCube3310 30c42b3a3f Betsy: Add signed mode for BC6
2024-09-02 09:49:14 +02:00

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#[versions]
signed = "#define SIGNED";
unsigned = "#define QUALITY"; // The "Quality" preset causes artifacting on signed data, so for now it's exclusive to unsigned.
#[compute]
#version 450
#include "CrossPlatformSettings_piece_all.glsl"
#include "UavCrossPlatform_piece_all.glsl"
#VERSION_DEFINES
float3 f32tof16(float3 value) {
return float3(packHalf2x16(float2(value.x, 0.0)),
packHalf2x16(float2(value.y, 0.0)),
packHalf2x16(float2(value.z, 0.0)));
}
float3 f16tof32(uint3 value) {
return float3(unpackHalf2x16(value.x).x,
unpackHalf2x16(value.y).x,
unpackHalf2x16(value.z).x);
}
float f32tof16(float value) {
return packHalf2x16(float2(value.x, 0.0));
}
float f16tof32(uint value) {
return unpackHalf2x16(value.x).x;
}
layout(binding = 0) uniform sampler2D srcTexture;
layout(binding = 1, rgba32ui) uniform restrict writeonly uimage2D dstTexture;
layout(push_constant, std430) uniform Params {
float2 p_textureSizeRcp;
uint padding0;
uint padding1;
}
params;
const float HALF_MAX = 65504.0f;
const uint PATTERN_NUM = 32u;
#ifdef SIGNED
const float HALF_MIN = -65504.0f;
#else
const float HALF_MIN = 0.0f;
#endif
#ifdef SIGNED
// https://github.com/godotengine/godot/pull/96377#issuecomment-2323488254
// https://github.com/godotengine/godot/pull/96377#issuecomment-2323450950
bool isNegative(float a) {
return a < 0.0f;
}
float CalcSignlessMSLE(float a, float b) {
float err = log2((b + 1.0f) / (a + 1.0f));
err = err * err;
return err;
}
float CrossCalcMSLE(float a, float b) {
float result = 0.0f;
result += CalcSignlessMSLE(0.0f, abs(a));
result += CalcSignlessMSLE(0.0f, abs(b));
return result;
}
float CalcMSLE(float3 a, float3 b) {
float result = 0.0f;
if (isNegative(a.x) != isNegative(b.x)) {
result += CrossCalcMSLE(a.x, b.x);
} else {
result += CalcSignlessMSLE(abs(a.x), abs(b.x));
}
if (isNegative(a.y) != isNegative(b.y)) {
result += CrossCalcMSLE(a.y, b.y);
} else {
result += CalcSignlessMSLE(abs(a.y), abs(b.y));
}
if (isNegative(a.z) != isNegative(b.z)) {
result += CrossCalcMSLE(a.z, b.z);
} else {
result += CalcSignlessMSLE(abs(a.z), abs(b.z));
}
return result;
}
#else
float CalcMSLE(float3 a, float3 b) {
float3 err = log2((b + 1.0f) / (a + 1.0f));
err = err * err;
return err.x + err.y + err.z;
}
#endif
uint PatternFixupID(uint i) {
uint ret = 15u;
ret = ((3441033216u >> i) & 0x1u) != 0 ? 2u : ret;
ret = ((845414400u >> i) & 0x1u) != 0 ? 8u : ret;
return ret;
}
uint Pattern(uint p, uint i) {
uint p2 = p / 2u;
uint p3 = p - p2 * 2u;
uint enc = 0u;
enc = p2 == 0u ? 2290666700u : enc;
enc = p2 == 1u ? 3972591342u : enc;
enc = p2 == 2u ? 4276930688u : enc;
enc = p2 == 3u ? 3967876808u : enc;
enc = p2 == 4u ? 4293707776u : enc;
enc = p2 == 5u ? 3892379264u : enc;
enc = p2 == 6u ? 4278255592u : enc;
enc = p2 == 7u ? 4026597360u : enc;
enc = p2 == 8u ? 9369360u : enc;
enc = p2 == 9u ? 147747072u : enc;
enc = p2 == 10u ? 1930428556u : enc;
enc = p2 == 11u ? 2362323200u : enc;
enc = p2 == 12u ? 823134348u : enc;
enc = p2 == 13u ? 913073766u : enc;
enc = p2 == 14u ? 267393000u : enc;
enc = p2 == 15u ? 966553998u : enc;
enc = p3 != 0u ? enc >> 16u : enc;
uint ret = (enc >> i) & 0x1u;
return ret;
}
#ifndef SIGNED
//UF
float3 Quantize7(float3 x) {
return (f32tof16(x) * 128.0f) / (0x7bff + 1.0f);
}
float3 Quantize9(float3 x) {
return (f32tof16(x) * 512.0f) / (0x7bff + 1.0f);
}
float3 Quantize10(float3 x) {
return (f32tof16(x) * 1024.0f) / (0x7bff + 1.0f);
}
float3 Unquantize7(float3 x) {
return (x * 65536.0f + 0x8000) / 128.0f;
}
float3 Unquantize9(float3 x) {
return (x * 65536.0f + 0x8000) / 512.0f;
}
float3 Unquantize10(float3 x) {
return (x * 65536.0f + 0x8000) / 1024.0f;
}
float3 FinishUnquantize(float3 endpoint0Unq, float3 endpoint1Unq, float weight) {
float3 comp = (endpoint0Unq * (64.0f - weight) + endpoint1Unq * weight + 32.0f) * (31.0f / 4096.0f);
return f16tof32(uint3(comp));
}
#else
//SF
float3 cmpSign(float3 value) {
float3 signVal;
signVal.x = value.x >= 0.0f ? 1.0f : -1.0f;
signVal.y = value.y >= 0.0f ? 1.0f : -1.0f;
signVal.z = value.z >= 0.0f ? 1.0f : -1.0f;
return signVal;
}
float3 Quantize7(float3 x) {
float3 signVal = cmpSign(x);
return signVal * (f32tof16(abs(x)) * 64.0f) / (0x7bff + 1.0f);
}
float3 Quantize9(float3 x) {
float3 signVal = cmpSign(x);
return signVal * (f32tof16(abs(x)) * 256.0f) / (0x7bff + 1.0f);
}
float3 Quantize10(float3 x) {
float3 signVal = cmpSign(x);
return signVal * (f32tof16(abs(x)) * 512.0f) / (0x7bff + 1.0f);
}
float3 Unquantize7(float3 x) {
float3 signVal = sign(x);
x = abs(x);
float3 finalVal = signVal * (x * 32768.0f + 0x4000) / 64.0f;
finalVal.x = x.x >= 64.0f ? 32767.0 : finalVal.x;
finalVal.y = x.y >= 64.0f ? 32767.0 : finalVal.y;
finalVal.z = x.z >= 64.0f ? 32767.0 : finalVal.z;
return finalVal;
}
float3 Unquantize9(float3 x) {
float3 signVal = sign(x);
x = abs(x);
float3 finalVal = signVal * (x * 32768.0f + 0x4000) / 256.0f;
finalVal.x = x.x >= 256.0f ? 32767.0 : finalVal.x;
finalVal.y = x.y >= 256.0f ? 32767.0 : finalVal.y;
finalVal.z = x.z >= 256.0f ? 32767.0 : finalVal.z;
return finalVal;
}
float3 Unquantize10(float3 x) {
float3 signVal = sign(x);
x = abs(x);
float3 finalVal = signVal * (x * 32768.0f + 0x4000) / 512.0f;
finalVal.x = x.x >= 512.0f ? 32767.0 : finalVal.x;
finalVal.y = x.y >= 512.0f ? 32767.0 : finalVal.y;
finalVal.z = x.z >= 512.0f ? 32767.0 : finalVal.z;
return finalVal;
}
float3 FinishUnquantize(float3 endpoint0Unq, float3 endpoint1Unq, float weight) {
float3 comp = (endpoint0Unq * (64.0f - weight) + endpoint1Unq * weight + 32.0f) * (31.0f / 2048.0f);
return f16tof32(uint3(comp));
}
#endif
void Swap(inout float3 a, inout float3 b) {
float3 tmp = a;
a = b;
b = tmp;
}
void Swap(inout float a, inout float b) {
float tmp = a;
a = b;
b = tmp;
}
uint ComputeIndex3(float texelPos, float endPoint0Pos, float endPoint1Pos) {
float r = (texelPos - endPoint0Pos) / (endPoint1Pos - endPoint0Pos);
return uint(clamp(r * 6.98182f + 0.00909f + 0.5f, 0.0f, 7.0f));
}
uint ComputeIndex4(float texelPos, float endPoint0Pos, float endPoint1Pos) {
float r = (texelPos - endPoint0Pos) / (endPoint1Pos - endPoint0Pos);
return uint(clamp(r * 14.93333f + 0.03333f + 0.5f, 0.0f, 15.0f));
}
// This adds a bitflag to quantized values that signifies whether they are negative.
void SignExtend(inout float3 v1, uint mask, uint signFlag) {
int3 v = int3(v1);
v.x = (v.x & int(mask)) | (v.x < 0 ? int(signFlag) : 0);
v.y = (v.y & int(mask)) | (v.y < 0 ? int(signFlag) : 0);
v.z = (v.z & int(mask)) | (v.z < 0 ? int(signFlag) : 0);
v1 = v;
}
// Encodes a block with mode 11 (2x 10-bit endpoints).
void EncodeP1(inout uint4 block, inout float blockMSLE, float3 texels[16]) {
// compute endpoints (min/max RGB bbox)
float3 blockMin = texels[0];
float3 blockMax = texels[0];
for (uint i = 1u; i < 16u; ++i) {
blockMin = min(blockMin, texels[i]);
blockMax = max(blockMax, texels[i]);
}
// refine endpoints in log2 RGB space
float3 refinedBlockMin = blockMax;
float3 refinedBlockMax = blockMin;
for (uint i = 0u; i < 16u; ++i) {
refinedBlockMin = min(refinedBlockMin, texels[i] == blockMin ? refinedBlockMin : texels[i]);
refinedBlockMax = max(refinedBlockMax, texels[i] == blockMax ? refinedBlockMax : texels[i]);
}
float3 logBlockMax = log2(blockMax + 1.0f);
float3 logBlockMin = log2(blockMin + 1.0f);
float3 logRefinedBlockMax = log2(refinedBlockMax + 1.0f);
float3 logRefinedBlockMin = log2(refinedBlockMin + 1.0f);
float3 logBlockMaxExt = (logBlockMax - logBlockMin) * (1.0f / 32.0f);
logBlockMin += min(logRefinedBlockMin - logBlockMin, logBlockMaxExt);
logBlockMax -= min(logBlockMax - logRefinedBlockMax, logBlockMaxExt);
blockMin = exp2(logBlockMin) - 1.0f;
blockMax = exp2(logBlockMax) - 1.0f;
float3 blockDir = blockMax - blockMin;
blockDir = blockDir / (blockDir.x + blockDir.y + blockDir.z);
float3 endpoint0 = Quantize10(blockMin);
float3 endpoint1 = Quantize10(blockMax);
float endPoint0Pos = f32tof16(dot(blockMin, blockDir));
float endPoint1Pos = f32tof16(dot(blockMax, blockDir));
#ifdef SIGNED
int maxVal10 = 0x1FF;
endpoint0 = clamp(endpoint0, -maxVal10, maxVal10);
endpoint1 = clamp(endpoint1, -maxVal10, maxVal10);
#endif
// check if endpoint swap is required
float fixupTexelPos = f32tof16(dot(texels[0], blockDir));
uint fixupIndex = ComputeIndex4(fixupTexelPos, endPoint0Pos, endPoint1Pos);
if (fixupIndex > 7) {
Swap(endPoint0Pos, endPoint1Pos);
Swap(endpoint0, endpoint1);
}
// compute indices
uint indices[16] = { 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u };
for (uint i = 0u; i < 16u; ++i) {
float texelPos = f32tof16(dot(texels[i], blockDir));
indices[i] = ComputeIndex4(texelPos, endPoint0Pos, endPoint1Pos);
}
// compute compression error (MSLE)
float3 endpoint0Unq = Unquantize10(endpoint0);
float3 endpoint1Unq = Unquantize10(endpoint1);
float msle = 0.0f;
for (uint i = 0u; i < 16u; ++i) {
float weight = floor((indices[i] * 64.0f) / 15.0f + 0.5f);
float3 texelUnc = FinishUnquantize(endpoint0Unq, endpoint1Unq, weight);
msle += CalcMSLE(texels[i], texelUnc);
}
#ifdef SIGNED
SignExtend(endpoint0, 0x1FF, 0x200);
SignExtend(endpoint1, 0x1FF, 0x200);
#endif
// encode block for mode 11
blockMSLE = msle;
block.x = 0x03;
// endpoints
block.x |= uint(endpoint0.x) << 5u;
block.x |= uint(endpoint0.y) << 15u;
block.x |= uint(endpoint0.z) << 25u;
block.y |= uint(endpoint0.z) >> 7u;
block.y |= uint(endpoint1.x) << 3u;
block.y |= uint(endpoint1.y) << 13u;
block.y |= uint(endpoint1.z) << 23u;
block.z |= uint(endpoint1.z) >> 9u;
// indices
block.z |= indices[0] << 1u;
block.z |= indices[1] << 4u;
block.z |= indices[2] << 8u;
block.z |= indices[3] << 12u;
block.z |= indices[4] << 16u;
block.z |= indices[5] << 20u;
block.z |= indices[6] << 24u;
block.z |= indices[7] << 28u;
block.w |= indices[8] << 0u;
block.w |= indices[9] << 4u;
block.w |= indices[10] << 8u;
block.w |= indices[11] << 12u;
block.w |= indices[12] << 16u;
block.w |= indices[13] << 20u;
block.w |= indices[14] << 24u;
block.w |= indices[15] << 28u;
}
float DistToLineSq(float3 PointOnLine, float3 LineDirection, float3 Point) {
float3 w = Point - PointOnLine;
float3 x = w - dot(w, LineDirection) * LineDirection;
return dot(x, x);
}
// Gets the deviation from the source data of a particular pattern (smaller is better).
float EvaluateP2Pattern(uint pattern, float3 texels[16]) {
float3 p0BlockMin = float3(HALF_MAX, HALF_MAX, HALF_MAX);
float3 p0BlockMax = float3(HALF_MIN, HALF_MIN, HALF_MIN);
float3 p1BlockMin = float3(HALF_MAX, HALF_MAX, HALF_MAX);
float3 p1BlockMax = float3(HALF_MIN, HALF_MIN, HALF_MIN);
for (uint i = 0; i < 16; ++i) {
uint paletteID = Pattern(pattern, i);
if (paletteID == 0) {
p0BlockMin = min(p0BlockMin, texels[i]);
p0BlockMax = max(p0BlockMax, texels[i]);
} else {
p1BlockMin = min(p1BlockMin, texels[i]);
p1BlockMax = max(p1BlockMax, texels[i]);
}
}
float3 p0BlockDir = normalize(p0BlockMax - p0BlockMin);
float3 p1BlockDir = normalize(p1BlockMax - p1BlockMin);
float sqDistanceFromLine = 0.0f;
for (uint i = 0; i < 16; ++i) {
uint paletteID = Pattern(pattern, i);
if (paletteID == 0) {
sqDistanceFromLine += DistToLineSq(p0BlockMin, p0BlockDir, texels[i]);
} else {
sqDistanceFromLine += DistToLineSq(p1BlockMin, p1BlockDir, texels[i]);
}
}
return sqDistanceFromLine;
}
// Encodes a block with either mode 2 (7-bit base, 3x 6-bit delta), or mode 6 (9-bit base, 3x 5-bit delta). Both use pattern encoding.
void EncodeP2Pattern(inout uint4 block, inout float blockMSLE, uint pattern, float3 texels[16]) {
float3 p0BlockMin = float3(HALF_MAX, HALF_MAX, HALF_MAX);
float3 p0BlockMax = float3(HALF_MIN, HALF_MIN, HALF_MIN);
float3 p1BlockMin = float3(HALF_MAX, HALF_MAX, HALF_MAX);
float3 p1BlockMax = float3(HALF_MIN, HALF_MIN, HALF_MIN);
for (uint i = 0u; i < 16u; ++i) {
uint paletteID = Pattern(pattern, i);
if (paletteID == 0) {
p0BlockMin = min(p0BlockMin, texels[i]);
p0BlockMax = max(p0BlockMax, texels[i]);
} else {
p1BlockMin = min(p1BlockMin, texels[i]);
p1BlockMax = max(p1BlockMax, texels[i]);
}
}
float3 p0BlockDir = p0BlockMax - p0BlockMin;
float3 p1BlockDir = p1BlockMax - p1BlockMin;
p0BlockDir = p0BlockDir / (p0BlockDir.x + p0BlockDir.y + p0BlockDir.z);
p1BlockDir = p1BlockDir / (p1BlockDir.x + p1BlockDir.y + p1BlockDir.z);
float p0Endpoint0Pos = f32tof16(dot(p0BlockMin, p0BlockDir));
float p0Endpoint1Pos = f32tof16(dot(p0BlockMax, p0BlockDir));
float p1Endpoint0Pos = f32tof16(dot(p1BlockMin, p1BlockDir));
float p1Endpoint1Pos = f32tof16(dot(p1BlockMax, p1BlockDir));
uint fixupID = PatternFixupID(pattern);
float p0FixupTexelPos = f32tof16(dot(texels[0], p0BlockDir));
float p1FixupTexelPos = f32tof16(dot(texels[fixupID], p1BlockDir));
uint p0FixupIndex = ComputeIndex3(p0FixupTexelPos, p0Endpoint0Pos, p0Endpoint1Pos);
uint p1FixupIndex = ComputeIndex3(p1FixupTexelPos, p1Endpoint0Pos, p1Endpoint1Pos);
if (p0FixupIndex > 3u) {
Swap(p0Endpoint0Pos, p0Endpoint1Pos);
Swap(p0BlockMin, p0BlockMax);
}
if (p1FixupIndex > 3u) {
Swap(p1Endpoint0Pos, p1Endpoint1Pos);
Swap(p1BlockMin, p1BlockMax);
}
uint indices[16] = { 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u };
for (uint i = 0u; i < 16u; ++i) {
float p0TexelPos = f32tof16(dot(texels[i], p0BlockDir));
float p1TexelPos = f32tof16(dot(texels[i], p1BlockDir));
uint p0Index = ComputeIndex3(p0TexelPos, p0Endpoint0Pos, p0Endpoint1Pos);
uint p1Index = ComputeIndex3(p1TexelPos, p1Endpoint0Pos, p1Endpoint1Pos);
uint paletteID = Pattern(pattern, i);
indices[i] = paletteID == 0u ? p0Index : p1Index;
}
float3 endpoint760 = floor(Quantize7(p0BlockMin));
float3 endpoint761 = floor(Quantize7(p0BlockMax));
float3 endpoint762 = floor(Quantize7(p1BlockMin));
float3 endpoint763 = floor(Quantize7(p1BlockMax));
float3 endpoint950 = floor(Quantize9(p0BlockMin));
float3 endpoint951 = floor(Quantize9(p0BlockMax));
float3 endpoint952 = floor(Quantize9(p1BlockMin));
float3 endpoint953 = floor(Quantize9(p1BlockMax));
endpoint761 = endpoint761 - endpoint760;
endpoint762 = endpoint762 - endpoint760;
endpoint763 = endpoint763 - endpoint760;
endpoint951 = endpoint951 - endpoint950;
endpoint952 = endpoint952 - endpoint950;
endpoint953 = endpoint953 - endpoint950;
int maxVal76 = 0x1F;
endpoint761 = clamp(endpoint761, -maxVal76, maxVal76);
endpoint762 = clamp(endpoint762, -maxVal76, maxVal76);
endpoint763 = clamp(endpoint763, -maxVal76, maxVal76);
int maxVal95 = 0xF;
endpoint951 = clamp(endpoint951, -maxVal95, maxVal95);
endpoint952 = clamp(endpoint952, -maxVal95, maxVal95);
endpoint953 = clamp(endpoint953, -maxVal95, maxVal95);
#ifdef SIGNED
int maxVal7 = 0x3F;
int maxVal9 = 0xFF;
endpoint760 = clamp(endpoint760, -maxVal7, maxVal7);
endpoint950 = clamp(endpoint950, -maxVal9, maxVal9);
#endif
float3 endpoint760Unq = Unquantize7(endpoint760);
float3 endpoint761Unq = Unquantize7(endpoint760 + endpoint761);
float3 endpoint762Unq = Unquantize7(endpoint760 + endpoint762);
float3 endpoint763Unq = Unquantize7(endpoint760 + endpoint763);
float3 endpoint950Unq = Unquantize9(endpoint950);
float3 endpoint951Unq = Unquantize9(endpoint950 + endpoint951);
float3 endpoint952Unq = Unquantize9(endpoint950 + endpoint952);
float3 endpoint953Unq = Unquantize9(endpoint950 + endpoint953);
float msle76 = 0.0f;
float msle95 = 0.0f;
for (uint i = 0u; i < 16u; ++i) {
uint paletteID = Pattern(pattern, i);
float3 tmp760Unq = paletteID == 0u ? endpoint760Unq : endpoint762Unq;
float3 tmp761Unq = paletteID == 0u ? endpoint761Unq : endpoint763Unq;
float3 tmp950Unq = paletteID == 0u ? endpoint950Unq : endpoint952Unq;
float3 tmp951Unq = paletteID == 0u ? endpoint951Unq : endpoint953Unq;
float weight = floor((indices[i] * 64.0f) / 7.0f + 0.5f);
float3 texelUnc76 = FinishUnquantize(tmp760Unq, tmp761Unq, weight);
float3 texelUnc95 = FinishUnquantize(tmp950Unq, tmp951Unq, weight);
msle76 += CalcMSLE(texels[i], texelUnc76);
msle95 += CalcMSLE(texels[i], texelUnc95);
}
SignExtend(endpoint761, 0x1F, 0x20);
SignExtend(endpoint762, 0x1F, 0x20);
SignExtend(endpoint763, 0x1F, 0x20);
SignExtend(endpoint951, 0xF, 0x10);
SignExtend(endpoint952, 0xF, 0x10);
SignExtend(endpoint953, 0xF, 0x10);
#ifdef SIGNED
SignExtend(endpoint760, 0x3F, 0x40);
SignExtend(endpoint950, 0xFF, 0x100);
#endif
// encode block
float p2MSLE = min(msle76, msle95);
if (p2MSLE < blockMSLE) {
blockMSLE = p2MSLE;
block = uint4(0u, 0u, 0u, 0u);
if (p2MSLE == msle76) {
// 7.6
block.x = 0x1u;
block.x |= (uint(endpoint762.y) & 0x20u) >> 3u;
block.x |= (uint(endpoint763.y) & 0x10u) >> 1u;
block.x |= (uint(endpoint763.y) & 0x20u) >> 1u;
block.x |= uint(endpoint760.x) << 5u;
block.x |= (uint(endpoint763.z) & 0x01u) << 12u;
block.x |= (uint(endpoint763.z) & 0x02u) << 12u;
block.x |= (uint(endpoint762.z) & 0x10u) << 10u;
block.x |= uint(endpoint760.y) << 15u;
block.x |= (uint(endpoint762.z) & 0x20u) << 17u;
block.x |= (uint(endpoint763.z) & 0x04u) << 21u;
block.x |= (uint(endpoint762.y) & 0x10u) << 20u;
block.x |= uint(endpoint760.z) << 25u;
block.y |= (uint(endpoint763.z) & 0x08u) >> 3u;
block.y |= (uint(endpoint763.z) & 0x20u) >> 4u;
block.y |= (uint(endpoint763.z) & 0x10u) >> 2u;
block.y |= uint(endpoint761.x) << 3u;
block.y |= (uint(endpoint762.y) & 0x0Fu) << 9u;
block.y |= uint(endpoint761.y) << 13u;
block.y |= (uint(endpoint763.y) & 0x0Fu) << 19u;
block.y |= uint(endpoint761.z) << 23u;
block.y |= (uint(endpoint762.z) & 0x07u) << 29u;
block.z |= (uint(endpoint762.z) & 0x08u) >> 3u;
block.z |= uint(endpoint762.x) << 1u;
block.z |= uint(endpoint763.x) << 7u;
} else {
// 9.5
block.x = 0xEu;
block.x |= uint(endpoint950.x) << 5u;
block.x |= (uint(endpoint952.z) & 0x10u) << 10u;
block.x |= uint(endpoint950.y) << 15u;
block.x |= (uint(endpoint952.y) & 0x10u) << 20u;
block.x |= uint(endpoint950.z) << 25u;
block.y |= uint(endpoint950.z) >> 7u;
block.y |= (uint(endpoint953.z) & 0x10u) >> 2u;
block.y |= uint(endpoint951.x) << 3u;
block.y |= (uint(endpoint953.y) & 0x10u) << 4u;
block.y |= (uint(endpoint952.y) & 0x0Fu) << 9u;
block.y |= uint(endpoint951.y) << 13u;
block.y |= (uint(endpoint953.z) & 0x01u) << 18u;
block.y |= (uint(endpoint953.y) & 0x0Fu) << 19u;
block.y |= uint(endpoint951.z) << 23u;
block.y |= (uint(endpoint953.z) & 0x02u) << 27u;
block.y |= uint(endpoint952.z) << 29u;
block.z |= (uint(endpoint952.z) & 0x08u) >> 3u;
block.z |= uint(endpoint952.x) << 1u;
block.z |= (uint(endpoint953.z) & 0x04u) << 4u;
block.z |= uint(endpoint953.x) << 7u;
block.z |= (uint(endpoint953.z) & 0x08u) << 9u;
}
block.z |= pattern << 13u;
uint blockFixupID = PatternFixupID(pattern);
if (blockFixupID == 15u) {
block.z |= indices[0] << 18u;
block.z |= indices[1] << 20u;
block.z |= indices[2] << 23u;
block.z |= indices[3] << 26u;
block.z |= indices[4] << 29u;
block.w |= indices[5] << 0u;
block.w |= indices[6] << 3u;
block.w |= indices[7] << 6u;
block.w |= indices[8] << 9u;
block.w |= indices[9] << 12u;
block.w |= indices[10] << 15u;
block.w |= indices[11] << 18u;
block.w |= indices[12] << 21u;
block.w |= indices[13] << 24u;
block.w |= indices[14] << 27u;
block.w |= indices[15] << 30u;
} else if (blockFixupID == 2u) {
block.z |= indices[0] << 18u;
block.z |= indices[1] << 20u;
block.z |= indices[2] << 23u;
block.z |= indices[3] << 25u;
block.z |= indices[4] << 28u;
block.z |= indices[5] << 31u;
block.w |= indices[5] >> 1u;
block.w |= indices[6] << 2u;
block.w |= indices[7] << 5u;
block.w |= indices[8] << 8u;
block.w |= indices[9] << 11u;
block.w |= indices[10] << 14u;
block.w |= indices[11] << 17u;
block.w |= indices[12] << 20u;
block.w |= indices[13] << 23u;
block.w |= indices[14] << 26u;
block.w |= indices[15] << 29u;
} else {
block.z |= indices[0] << 18u;
block.z |= indices[1] << 20u;
block.z |= indices[2] << 23u;
block.z |= indices[3] << 26u;
block.z |= indices[4] << 29u;
block.w |= indices[5] << 0u;
block.w |= indices[6] << 3u;
block.w |= indices[7] << 6u;
block.w |= indices[8] << 9u;
block.w |= indices[9] << 11u;
block.w |= indices[10] << 14u;
block.w |= indices[11] << 17u;
block.w |= indices[12] << 20u;
block.w |= indices[13] << 23u;
block.w |= indices[14] << 26u;
block.w |= indices[15] << 29u;
}
}
}
layout(local_size_x = 8,
local_size_y = 8,
local_size_z = 1) in;
void main() {
// gather texels for current 4x4 block
// 0 1 2 3
// 4 5 6 7
// 8 9 10 11
// 12 13 14 15
float2 uv = gl_GlobalInvocationID.xy * params.p_textureSizeRcp * 4.0f + params.p_textureSizeRcp;
float2 block0UV = uv;
float2 block1UV = uv + float2(2.0f * params.p_textureSizeRcp.x, 0.0f);
float2 block2UV = uv + float2(0.0f, 2.0f * params.p_textureSizeRcp.y);
float2 block3UV = uv + float2(2.0f * params.p_textureSizeRcp.x, 2.0f * params.p_textureSizeRcp.y);
float4 block0X = OGRE_GatherRed(srcTexture, pointSampler, block0UV);
float4 block1X = OGRE_GatherRed(srcTexture, pointSampler, block1UV);
float4 block2X = OGRE_GatherRed(srcTexture, pointSampler, block2UV);
float4 block3X = OGRE_GatherRed(srcTexture, pointSampler, block3UV);
float4 block0Y = OGRE_GatherGreen(srcTexture, pointSampler, block0UV);
float4 block1Y = OGRE_GatherGreen(srcTexture, pointSampler, block1UV);
float4 block2Y = OGRE_GatherGreen(srcTexture, pointSampler, block2UV);
float4 block3Y = OGRE_GatherGreen(srcTexture, pointSampler, block3UV);
float4 block0Z = OGRE_GatherBlue(srcTexture, pointSampler, block0UV);
float4 block1Z = OGRE_GatherBlue(srcTexture, pointSampler, block1UV);
float4 block2Z = OGRE_GatherBlue(srcTexture, pointSampler, block2UV);
float4 block3Z = OGRE_GatherBlue(srcTexture, pointSampler, block3UV);
float3 texels[16];
texels[0] = float3(block0X.w, block0Y.w, block0Z.w);
texels[1] = float3(block0X.z, block0Y.z, block0Z.z);
texels[2] = float3(block1X.w, block1Y.w, block1Z.w);
texels[3] = float3(block1X.z, block1Y.z, block1Z.z);
texels[4] = float3(block0X.x, block0Y.x, block0Z.x);
texels[5] = float3(block0X.y, block0Y.y, block0Z.y);
texels[6] = float3(block1X.x, block1Y.x, block1Z.x);
texels[7] = float3(block1X.y, block1Y.y, block1Z.y);
texels[8] = float3(block2X.w, block2Y.w, block2Z.w);
texels[9] = float3(block2X.z, block2Y.z, block2Z.z);
texels[10] = float3(block3X.w, block3Y.w, block3Z.w);
texels[11] = float3(block3X.z, block3Y.z, block3Z.z);
texels[12] = float3(block2X.x, block2Y.x, block2Z.x);
texels[13] = float3(block2X.y, block2Y.y, block2Z.y);
texels[14] = float3(block3X.x, block3Y.x, block3Z.x);
texels[15] = float3(block3X.y, block3Y.y, block3Z.y);
uint4 block = uint4(0u, 0u, 0u, 0u);
float blockMSLE = 0.0f;
EncodeP1(block, blockMSLE, texels);
#ifdef QUALITY
float bestScore = EvaluateP2Pattern(0, texels);
uint bestPattern = 0;
for (uint i = 1u; i < PATTERN_NUM; ++i) {
float score = EvaluateP2Pattern(i, texels);
if (score < bestScore) {
bestPattern = i;
bestScore = score;
}
}
EncodeP2Pattern(block, blockMSLE, bestPattern, texels);
#endif
imageStore(dstTexture, int2(gl_GlobalInvocationID.xy), block);
}
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