diff options
Diffstat (limited to 'src/gui/painting/qdrawingprimitive_sse2_p.h')
| -rw-r--r-- | src/gui/painting/qdrawingprimitive_sse2_p.h | 69 |
1 files changed, 47 insertions, 22 deletions
diff --git a/src/gui/painting/qdrawingprimitive_sse2_p.h b/src/gui/painting/qdrawingprimitive_sse2_p.h index 93e4b9f572..b237ea1611 100644 --- a/src/gui/painting/qdrawingprimitive_sse2_p.h +++ b/src/gui/painting/qdrawingprimitive_sse2_p.h @@ -43,6 +43,7 @@ #include <QtGui/private/qtguiglobal_p.h> #include <private/qsimd_p.h> #include "qdrawhelper_p.h" +#include "qrgba64_p.h" #ifdef __SSE2__ @@ -230,21 +231,31 @@ QT_END_NAMESPACE QT_BEGIN_NAMESPACE #if QT_COMPILER_SUPPORTS_HERE(SSE4_1) +QT_FUNCTION_TARGET(SSE2) +Q_ALWAYS_INLINE void reciprocal_mul_ss(__m128 &ia, const __m128 a, float mul) +{ + ia = _mm_rcp_ss(a); // Approximate 1/a + // Improve precision of ia using Newton-Raphson + ia = _mm_sub_ss(_mm_add_ss(ia, ia), _mm_mul_ss(ia, _mm_mul_ss(ia, a))); + ia = _mm_mul_ss(ia, _mm_set_ss(mul)); + ia = _mm_shuffle_ps(ia, ia, _MM_SHUFFLE(0,0,0,0)); +} + QT_FUNCTION_TARGET(SSE4_1) inline QRgb qUnpremultiply_sse4(QRgb p) { const uint alpha = qAlpha(p); - if (alpha == 255 || alpha == 0) + if (alpha == 255) return p; - const uint invAlpha = qt_inv_premul_factor[alpha]; - const __m128i via = _mm_set1_epi32(invAlpha); - const __m128i vr = _mm_set1_epi32(0x8000); + if (alpha == 0) + return 0; + const __m128 va = _mm_set1_ps(alpha); + __m128 via; + reciprocal_mul_ss(via, va, 255.0f); // Approximate 1/a __m128i vl = _mm_cvtepu8_epi32(_mm_cvtsi32_si128(p)); - vl = _mm_mullo_epi32(vl, via); - vl = _mm_add_epi32(vl, vr); - vl = _mm_srai_epi32(vl, 16); - vl = _mm_insert_epi32(vl, alpha, 3); + vl = _mm_cvtps_epi32(_mm_mul_ps(_mm_cvtepi32_ps(vl), via)); vl = _mm_packus_epi32(vl, vl); + vl = _mm_insert_epi16(vl, alpha, 3); vl = _mm_packus_epi16(vl, vl); return _mm_cvtsi128_si32(vl); } @@ -258,21 +269,14 @@ inline uint qConvertArgb32ToA2rgb30_sse4(QRgb p) return qConvertRgb32ToRgb30<PixelOrder>(p); if (alpha == 0) return 0; - Q_CONSTEXPR uint mult = 255 / (255 >> 6); - const uint invAlpha = qt_inv_premul_factor[alpha]; + Q_CONSTEXPR float mult = 1023.0f / (255 >> 6); const uint newalpha = (alpha >> 6); - const __m128i via = _mm_set1_epi32(invAlpha); - const __m128i vna = _mm_set1_epi32(mult * newalpha); - const __m128i vr1 = _mm_set1_epi32(0x1000); - const __m128i vr2 = _mm_set1_epi32(0x80); - __m128i vl = _mm_cvtepu8_epi32(_mm_cvtsi32_si128(p)); - vl = _mm_mullo_epi32(vl, via); - vl = _mm_add_epi32(vl, vr1); - vl = _mm_srli_epi32(vl, 14); - vl = _mm_mullo_epi32(vl, vna); - vl = _mm_add_epi32(vl, _mm_srli_epi32(vl, 8)); - vl = _mm_add_epi32(vl, vr2); - vl = _mm_srli_epi32(vl, 8); + const __m128 va = _mm_set1_ps(alpha); + __m128 via; + reciprocal_mul_ss(via, va, mult * newalpha); + __m128i vl = _mm_cvtsi32_si128(p); + vl = _mm_cvtepu8_epi32(vl); + vl = _mm_cvtps_epi32(_mm_mul_ps(_mm_cvtepi32_ps(vl), via)); vl = _mm_packus_epi32(vl, vl); uint rgb30 = (newalpha << 30); rgb30 |= ((uint)_mm_extract_epi16(vl, 1)) << 10; @@ -285,6 +289,27 @@ inline uint qConvertArgb32ToA2rgb30_sse4(QRgb p) } return rgb30; } + +template<enum QtPixelOrder PixelOrder> +QT_FUNCTION_TARGET(SSE4_1) +inline uint qConvertRgba64ToRgb32_sse4(QRgba64 p) +{ + if (p.isTransparent()) + return 0; + __m128i vl = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(&p)); + if (!p.isOpaque()) { + const __m128 va = _mm_set1_ps(p.alpha()); + __m128 via; + reciprocal_mul_ss(via, va, 65535.0f); + vl = _mm_unpacklo_epi16(vl, _mm_setzero_si128()); + vl = _mm_cvtps_epi32(_mm_mul_ps(_mm_cvtepi32_ps(vl) , via)); + vl = _mm_packus_epi32(vl, vl); + vl = _mm_insert_epi16(vl, p.alpha(), 3); + } + if (PixelOrder == PixelOrderBGR) + vl = _mm_shufflelo_epi16(vl, _MM_SHUFFLE(3, 0, 1, 2)); + return toArgb32(vl); +} #endif QT_END_NAMESPACE |