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Since all of our texture dimensions are powers of two, we can optimize out the modulo in favor of a mask.

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This commit is contained in:
Pavel Krajcevski 2013-10-14 17:36:40 -04:00
parent 87f1e06cb5
commit 4f44826056
1 changed files with 13 additions and 13 deletions
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26
PVRTCEncoder/src/Compressor.cpp
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@ -180,8 +180,8 @@ namespace PVRTCC {
if(i == 0 && j == 0) continue;
int32 xx = (i + static_cast<int32>(x + width)) % width;
int32 yy = (j + static_cast<int32>(y + height)) % height;
int32 xx = (i + static_cast<int32>(x + width)) & (width - 1);
int32 yy = (j + static_cast<int32>(y + height)) & (height - 1);
assert(xx >= 0 && xx < static_cast<int32>(width));
assert(yy >= 0 && yy < static_cast<int32>(height));
@ -284,16 +284,16 @@ namespace PVRTCC {
for(uint32 j = 0; j < h+3; j++) {
for(uint32 i = 0; i < w; i++) {
EExtremaResult result = ComputeLocalExtrema(labels, inBuf, i, j % h, w, h);
EExtremaResult result = ComputeLocalExtrema(labels, inBuf, i, j & (h - 1), w, h);
bool dilateMax = result != eExtremaResult_LocalMax;
bool dilateMin = result != eExtremaResult_LocalMin;
if(dilateMax || dilateMin) {
// Look up and to the left to determine the distance...
uint32 upIdx = ((j+h-1) % h) * w + i;
uint32 leftIdx = (j % h) * w + ((i+w-1) % w);
uint32 upIdx = ((j+h-1) & (h - 1)) * w + i;
uint32 leftIdx = (j & (h - 1)) * w + ((i+w-1) & (w - 1));
CompressionLabel &l = labels[(j % h)*w + i];
CompressionLabel &l = labels[(j & (h - 1))*w + i];
CompressionLabel &up = labels[upIdx];
CompressionLabel &left = labels[leftIdx];
@ -359,22 +359,22 @@ namespace PVRTCC {
for(int32 j = static_cast<int32>(h)+2; j >= 0; j--) {
for(int32 i = static_cast<int32>(w)-1; i >= 0; i--) {
CompressionLabel &l = labels[(j % h) * w + i];
CompressionLabel &l = labels[(j & (h - 1)) * w + i];
// Add top right corner
neighbors[0] = &(labels[((j + h - 1) % h) * w + ((i + 1) % w)]);
neighbors[0] = &(labels[((j + h - 1) & (h - 1)) * w + ((i + 1) & (w - 1))]);
// Add right label
neighbors[1] = &(labels[(j % h) * w + ((i + 1) % w)]);
neighbors[1] = &(labels[(j & (h - 1)) * w + ((i + 1) & (w - 1))]);
// Add bottom right label
neighbors[2] = &(labels[((j + 1) % h) * w + ((i + 1) % w)]);
neighbors[2] = &(labels[((j + 1) & (h - 1)) * w + ((i + 1) & (w - 1))]);
// Add bottom label
neighbors[3] = &(labels[((j + 1) % h) * w + i]);
neighbors[3] = &(labels[((j + 1) & (h - 1)) * w + i]);
// Add bottom left label
neighbors[4] = &(labels[((j + 1) % h) * w + ((i + w - 1) % w)]);
neighbors[4] = &(labels[((j + 1) & (h - 1)) * w + ((i + w - 1) & (w - 1))]);
DilateLabelBackward(l.highLabel, neighbors, true);
DilateLabelBackward(l.lowLabel, neighbors, false);
@ -420,7 +420,7 @@ namespace PVRTCC {
for(uint32 y = j*4; y <= (j+1)*4; y++)
for(uint32 x = i*4; x <= (i+1)*4; x++) {
uint32 idx = (y%h)*w + (x%w);
uint32 idx = (y & (h-1))*w + (x & (w-1));
float intensity = labels[idx].intensity;
if(intensity < minIntensity) {
minIntensity = intensity;