diff options
| -rw-r--r-- | indra/llrender/llimagegl.cpp | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp index 26e6aad770..04489ea78a 100644 --- a/indra/llrender/llimagegl.cpp +++ b/indra/llrender/llimagegl.cpp @@ -2179,15 +2179,15 @@ void LLImageGL::analyzeAlpha(const void* data_in, U32 w, U32 h) // this will mid-skew the data (and thus increase the chances of not // being used as a mask) from high-frequency alpha maps which // suffer the worst from aliasing when used as alpha masks. - if (w >= 4 && h >= 4) + if (w >= 2 && h >= 2) { - llassert(w%4 == 0); - llassert(h%4 == 0); + llassert(w % 2 == 0); + llassert(h % 2 == 0); const GLubyte* rowstart = ((const GLubyte*) data_in) + mAlphaOffset; - for (U32 y = 0; y < h; y+=4) + for (U32 y = 0; y < h; y += 2) { const GLubyte* current = rowstart; - for (U32 x = 0; x < w; x+=4) + for (U32 x = 0; x < w; x += 2) { const U32 s1 = current[0]; alphatotal += s1; @@ -2210,8 +2210,7 @@ void LLImageGL::analyzeAlpha(const void* data_in, U32 w, U32 h) sample[asum/(16*4)] += 4; } - - rowstart += 4 * w * mAlphaStride; + rowstart += 2 * w * mAlphaStride; } length *= 2; // we sampled everything twice, essentially } |