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lizzie
2026-01-29 23:16:20 +00:00
committed by crueter
parent 71d0b4f79b
commit 7ec09305d0
1 changed files with 91 additions and 90 deletions
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181
src/video_core/host_shaders/astc_decoder.comp
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@@ -402,15 +402,103 @@ void DecodeIntegerSequence(uint max_range, uint num_values) {
}
}
uint DecodeSingleColorValue(EncodingData val) {
const uint encoding = Encoding(val);
const uint bitlen = NumBits(val);
const uint bitval = BitValue(val);
uint B = 0, C = 0, D = 0;
uint A = ReplicateBitTo9((bitval & 1));
switch (encoding) {
case JUST_BITS:
break;
case TRIT: {
D = QuintTritValue(val);
switch (bitlen) {
case 1:
C = 204;
break;
case 2: {
C = 93;
const uint b = (bitval >> 1) & 1;
B = (b << 8) | (b << 4) | (b << 2) | (b << 1);
break;
}
case 3: {
C = 44;
const uint cb = (bitval >> 1) & 3;
B = (cb << 7) | (cb << 2) | cb;
break;
}
case 4: {
C = 22;
const uint dcb = (bitval >> 1) & 7;
B = (dcb << 6) | dcb;
break;
}
case 5: {
C = 11;
const uint edcb = (bitval >> 1) & 0xF;
B = (edcb << 5) | (edcb >> 2);
break;
}
case 6: {
C = 5;
const uint fedcb = (bitval >> 1) & 0x1F;
B = (fedcb << 4) | (fedcb >> 4);
break;
}
}
break;
}
case QUINT: {
D = QuintTritValue(val);
switch (bitlen) {
case 1:
C = 113;
break;
case 2: {
C = 54;
const uint b = (bitval >> 1) & 1;
B = (b << 8) | (b << 3) | (b << 2);
break;
}
case 3: {
C = 26;
const uint cb = (bitval >> 1) & 3;
B = (cb << 7) | (cb << 1) | (cb >> 1);
break;
}
case 4: {
C = 13;
const uint dcb = (bitval >> 1) & 7;
B = (dcb << 6) | (dcb >> 1);
break;
}
case 5: {
C = 6;
const uint edcb = (bitval >> 1) & 0xF;
B = (edcb << 5) | (edcb >> 3);
break;
}
}
break;
}
}
uint unq = D * C + B;
unq = unq ^ A;
unq = (A & 0x80) | (unq >> 2);
return encoding == JUST_BITS ? FastReplicateTo8(bitval, bitlen) : unq;
}
void DecodeColorValues(uvec4 modes, uint num_partitions, uint color_data_bits, out uint color_values[32]) {
// TODO: modes[] zero on invalid, so less ops
const uvec4 num_values_tmp = (((modes >> 2) + 1) << 1) & ((uvec4(0, 1, 2, 3) - num_partitions) >> 8);
uint num_values = num_values_tmp.x + num_values_tmp.y + num_values_tmp.z + num_values_tmp.w;
// Find the largest encoding that's within color_data_bits
// TODO(ameerj): profile with binary search
int range = 0;
uint range = 0;
while (++range < encoding_values.length()) {
const uint bit_length = GetBitLength(num_values, range);
const uint bit_length = GetBitLength(num_values, int(range));
if (bit_length > color_data_bits) {
break;
}
@@ -418,94 +506,7 @@ void DecodeColorValues(uvec4 modes, uint num_partitions, uint color_data_bits, o
const uint upper_bound = num_values;
DecodeIntegerSequence(range - 1, num_values);
for (int i = 0; i < upper_bound; ++i) {
const EncodingData val = GetEncodingFromVector(i);
const uint encoding = Encoding(val);
const uint bitlen = NumBits(val);
const uint bitval = BitValue(val);
uint B = 0, C = 0, D = 0;
uint A = ReplicateBitTo9((bitval & 1));
switch (encoding) {
case JUST_BITS:
break;
case TRIT: {
D = QuintTritValue(val);
switch (bitlen) {
case 1:
C = 204;
break;
case 2: {
C = 93;
const uint b = (bitval >> 1) & 1;
B = (b << 8) | (b << 4) | (b << 2) | (b << 1);
break;
}
case 3: {
C = 44;
const uint cb = (bitval >> 1) & 3;
B = (cb << 7) | (cb << 2) | cb;
break;
}
case 4: {
C = 22;
const uint dcb = (bitval >> 1) & 7;
B = (dcb << 6) | dcb;
break;
}
case 5: {
C = 11;
const uint edcb = (bitval >> 1) & 0xF;
B = (edcb << 5) | (edcb >> 2);
break;
}
case 6: {
C = 5;
const uint fedcb = (bitval >> 1) & 0x1F;
B = (fedcb << 4) | (fedcb >> 4);
break;
}
}
break;
}
case QUINT: {
D = QuintTritValue(val);
switch (bitlen) {
case 1:
C = 113;
break;
case 2: {
C = 54;
const uint b = (bitval >> 1) & 1;
B = (b << 8) | (b << 3) | (b << 2);
break;
}
case 3: {
C = 26;
const uint cb = (bitval >> 1) & 3;
B = (cb << 7) | (cb << 1) | (cb >> 1);
break;
}
case 4: {
C = 13;
const uint dcb = (bitval >> 1) & 7;
B = (dcb << 6) | (dcb >> 1);
break;
}
case 5: {
C = 6;
const uint edcb = (bitval >> 1) & 0xF;
B = (edcb << 5) | (edcb >> 3);
break;
}
}
break;
}
}
uint unq = D * C + B;
unq = unq ^ A;
unq = (A & 0x80) | (unq >> 2);
color_values[i + 1] = encoding == JUST_BITS
? FastReplicateTo8(bitval, bitlen)
: unq;
color_values[i + 1] = DecodeSingleColorValue(GetEncodingFromVector(i));
}
}