diff options
Diffstat (limited to 'src/gui/painting/qblendfunctions.cpp')
| -rw-r--r-- | src/gui/painting/qblendfunctions.cpp | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/src/gui/painting/qblendfunctions.cpp b/src/gui/painting/qblendfunctions.cpp index 0a5d458532..a4a091a29f 100644 --- a/src/gui/painting/qblendfunctions.cpp +++ b/src/gui/painting/qblendfunctions.cpp @@ -385,19 +385,25 @@ void qt_blend_rgb32_on_rgb32(uchar *destPixels, int dbpl, destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha); fflush(stdout); #endif - - if (const_alpha != 256) { - qt_blend_argb32_on_argb32(destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha); - return; - } - const uint *src = (const uint *) srcPixels; uint *dst = (uint *) destPixels; - int len = w * 4; - for (int y=0; y<h; ++y) { - memcpy(dst, src, len); - dst = (quint32 *)(((uchar *) dst) + dbpl); - src = (const quint32 *)(((const uchar *) src) + sbpl); + if (const_alpha == 256) { + const int len = w * 4; + for (int y = 0; y < h; ++y) { + memcpy(dst, src, len); + dst = (quint32 *)(((uchar *) dst) + dbpl); + src = (const quint32 *)(((const uchar *) src) + sbpl); + } + return; + } else if (const_alpha != 0) { + const_alpha = (const_alpha * 255) >> 8; + int ialpha = 255 - const_alpha; + for (int y=0; y<h; ++y) { + for (int x=0; x<w; ++x) + dst[x] = INTERPOLATE_PIXEL_255(dst[x], ialpha, src[x], const_alpha); + dst = (quint32 *)(((uchar *) dst) + dbpl); + src = (const quint32 *)(((const uchar *) src) + sbpl); + } } } @@ -414,7 +420,7 @@ struct Blend_RGB32_on_RGB32_ConstAlpha { } inline void write(quint32 *dst, quint32 src) { - *dst = BYTE_MUL(src, m_alpha) + BYTE_MUL(*dst, m_ialpha); + *dst = INTERPOLATE_PIXEL_255(src, m_alpha, *dst, m_ialpha); } inline void flush(void *) {} |