diff options
Diffstat (limited to 'src/gui/painting')
| -rw-r--r-- | src/gui/painting/qdrawhelper.cpp | 2 | ||||
| -rw-r--r-- | src/gui/painting/qdrawhelper_sse2.cpp | 33 |
2 files changed, 35 insertions, 0 deletions
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp index 4ce2bee..1ff3d7b 100644 --- a/src/gui/painting/qdrawhelper.cpp +++ b/src/gui/painting/qdrawhelper.cpp @@ -7820,8 +7820,10 @@ void qInitDrawhelperAsm() uint const_alpha); extern void QT_FASTCALL comp_func_solid_SourceOver_sse2(uint *destPixels, int length, uint color, uint const_alpha); extern void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uint const_alpha); + extern void QT_FASTCALL comp_func_Source_sse2(uint *dst, const uint *src, int length, uint const_alpha); functionForModeAsm[0] = comp_func_SourceOver_sse2; + functionForModeAsm[QPainter::CompositionMode_Source] = comp_func_Source_sse2; functionForModeAsm[QPainter::CompositionMode_Plus] = comp_func_Plus_sse2; functionForModeSolidAsm[0] = comp_func_solid_SourceOver_sse2; diff --git a/src/gui/painting/qdrawhelper_sse2.cpp b/src/gui/painting/qdrawhelper_sse2.cpp index e090ae5..7ab9eda 100644 --- a/src/gui/painting/qdrawhelper_sse2.cpp +++ b/src/gui/painting/qdrawhelper_sse2.cpp @@ -229,6 +229,39 @@ void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uin } } +void QT_FASTCALL comp_func_Source_sse2(uint *dst, const uint *src, int length, uint const_alpha) +{ + if (const_alpha == 255) { + ::memcpy(dst, src, length * sizeof(uint)); + } else { + const int ialpha = 255 - const_alpha; + + int x = 0; + + // 1) prologue, align on 16 bytes + const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3; + const int prologLength = qMin(length, offsetToAlignOn16Bytes); + for (; x < prologLength; ++x) + dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], ialpha); + + // 2) interpolate pixels with SSE2 + const __m128i half = _mm_set1_epi16(0x80); + const __m128i colorMask = _mm_set1_epi32(0x00ff00ff); + const __m128i constAlphaVector = _mm_set1_epi16(const_alpha); + const __m128i oneMinusConstAlpha = _mm_set1_epi16(ialpha); + for (; x < length - 3; x += 4) { + const __m128i srcVector = _mm_loadu_si128((__m128i *)&src[x]); + __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); + INTERPOLATE_PIXEL_255_SSE2(dstVector, srcVector, dstVector, constAlphaVector, oneMinusConstAlpha, colorMask, half) + _mm_store_si128((__m128i *)&dst[x], dstVector); + } + + // 3) Epilogue + for (; x < length; ++x) + dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], ialpha); + } +} + void qt_memfill32_sse2(quint32 *dest, quint32 value, int count) { if (count < 7) { |