diff options
Diffstat (limited to 'src/gui/painting/qdrawhelper_ssse3.cpp')
| -rw-r--r-- | src/gui/painting/qdrawhelper_ssse3.cpp | 20 |
1 files changed, 5 insertions, 15 deletions
diff --git a/src/gui/painting/qdrawhelper_ssse3.cpp b/src/gui/painting/qdrawhelper_ssse3.cpp index bc4a7eb8..9c02009 100644 --- a/src/gui/painting/qdrawhelper_ssse3.cpp +++ b/src/gui/painting/qdrawhelper_ssse3.cpp @@ -118,22 +118,12 @@ inline static void blend_pixel(quint32 &dst, const quint32 src) \ /* We use two vectors to extract the src: prevLoaded for the first pixels, lastLoaded for the current pixels. */\ __m128i srcVectorPrevLoaded;\ - if (minusOffsetToAlignSrcOn16Bytes <= prologLength) {\ - srcVectorPrevLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes]);\ - } else {\ - quint32 temp[4] Q_DECL_ALIGN(16);\ - switch (prologLength) {\ - case 3:\ - temp[1] = src[x - 3];\ - case 2:\ - temp[2] = src[x - 2];\ - case 1:\ - temp[3] = src[x - 1];\ - default:\ - break;\ - }\ - srcVectorPrevLoaded = _mm_load_si128((__m128i *)temp);\ + if (minusOffsetToAlignSrcOn16Bytes > prologLength) {\ + /* We go forward 4 pixels to avoid reading before src. */\ + for (; x < prologLength + 4; ++x)\ + blend_pixel(dst[x], src[x]); \ }\ + srcVectorPrevLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes]);\ const int palignrOffset = minusOffsetToAlignSrcOn16Bytes << 2;\ \ const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\ |