author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:19:32 +0300 | |
changeset 37 | 758a864f9613 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the QtGui module of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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|
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#include <private/qdrawhelper_x86_p.h> |
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|
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#ifdef QT_HAVE_SSSE3 |
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|
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#include <private/qdrawingprimitive_sse2_p.h> |
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QT_BEGIN_NAMESPACE |
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inline static void blend_pixel(quint32 &dst, const quint32 src) |
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{ |
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if (src >= 0xff000000) |
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dst = src; |
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else if (src != 0) |
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dst = src + BYTE_MUL(dst, qAlpha(~src)); |
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} |
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/* The instruction palignr uses direct arguments, so we have to generate the code fo the different |
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shift (4, 8, 12). Checking the alignment inside the loop is unfortunatelly way too slow. |
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*/ |
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#define BLENDING_LOOP(palignrOffset, length)\ |
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for (; x < length-3; x += 4) { \ |
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const __m128i srcVectorLastLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes + 4]);\ |
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const __m128i srcVector = _mm_alignr_epi8(srcVectorLastLoaded, srcVectorPrevLoaded, palignrOffset); \ |
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const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); \ |
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if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { \ |
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_mm_store_si128((__m128i *)&dst[x], srcVector); \ |
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} else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \ |
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__m128i alphaChannel = _mm_shuffle_epi8(srcVector, alphaShuffleMask); \ |
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alphaChannel = _mm_sub_epi16(one, alphaChannel); \ |
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const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \ |
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__m128i destMultipliedByOneMinusAlpha; \ |
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BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \ |
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const __m128i result = _mm_add_epi8(srcVector, destMultipliedByOneMinusAlpha); \ |
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_mm_store_si128((__m128i *)&dst[x], result); \ |
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} \ |
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srcVectorPrevLoaded = srcVectorLastLoaded;\ |
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} |
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#define BLEND_SOURCE_OVER_ARGB32_FIRST_ROW_SSSE3(dst, src, length, nullVector, half, one, colorMask, alphaMask) { \ |
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int x = 0; \ |
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\ |
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/* First, get dst aligned. */ \ |
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const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;\ |
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const int prologLength = qMin(length, offsetToAlignOn16Bytes);\ |
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\ |
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for (; x < prologLength; ++x) {\ |
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blend_pixel(dst[x], src[x]); \ |
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} \ |
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\ |
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const int minusOffsetToAlignSrcOn16Bytes = (reinterpret_cast<quintptr>(&(src[x])) >> 2) & 0x3;\ |
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\ |
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if (!minusOffsetToAlignSrcOn16Bytes) {\ |
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/* src is aligned, usual algorithm but with aligned operations.\ |
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See the SSE2 version for more documentation on the algorithm itself. */\ |
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const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\ |
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for (; x < length-3; x += 4) { \ |
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const __m128i srcVector = _mm_load_si128((__m128i *)&src[x]); \ |
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const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); \ |
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if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { \ |
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_mm_store_si128((__m128i *)&dst[x], srcVector); \ |
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} else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \ |
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__m128i alphaChannel = _mm_shuffle_epi8(srcVector, alphaShuffleMask); \ |
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alphaChannel = _mm_sub_epi16(one, alphaChannel); \ |
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const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \ |
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__m128i destMultipliedByOneMinusAlpha; \ |
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BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \ |
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const __m128i result = _mm_add_epi8(srcVector, destMultipliedByOneMinusAlpha); \ |
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_mm_store_si128((__m128i *)&dst[x], result); \ |
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} \ |
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} /* end for() */\ |
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} else if ((length - x) >= 8) {\ |
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/* We are at the first line, so "x - minusOffsetToAlignSrcOn16Bytes" could go before src, and\ |
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generate an invalid access. */\ |
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\ |
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/* We use two vectors to extract the src: prevLoaded for the first pixels, lastLoaded for the current pixels. */\ |
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__m128i srcVectorPrevLoaded;\ |
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if (minusOffsetToAlignSrcOn16Bytes > prologLength) {\ |
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/* We go forward 4 pixels to avoid reading before src. */\ |
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for (; x < prologLength + 4; ++x)\ |
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blend_pixel(dst[x], src[x]); \ |
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}\ |
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srcVectorPrevLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes]);\ |
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const int palignrOffset = minusOffsetToAlignSrcOn16Bytes << 2;\ |
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\ |
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const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\ |
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switch (palignrOffset) {\ |
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case 4:\ |
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BLENDING_LOOP(4, length)\ |
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break;\ |
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133 |
case 8:\ |
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BLENDING_LOOP(8, length)\ |
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break;\ |
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case 12:\ |
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BLENDING_LOOP(12, length)\ |
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break;\ |
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}\ |
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}\ |
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for (; x < length; ++x) \ |
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blend_pixel(dst[x], src[x]); \ |
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} |
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144 |
|
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// Basically blend src over dst with the const alpha defined as constAlphaVector. |
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// nullVector, half, one, colorMask are constant accross the whole image/texture, and should be defined as: |
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//const __m128i nullVector = _mm_set1_epi32(0); |
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//const __m128i half = _mm_set1_epi16(0x80); |
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//const __m128i one = _mm_set1_epi16(0xff); |
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//const __m128i colorMask = _mm_set1_epi32(0x00ff00ff); |
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//const __m128i alphaMask = _mm_set1_epi32(0xff000000); |
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// |
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// The computation being done is: |
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// result = s + d * (1-alpha) |
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// with shortcuts if fully opaque or fully transparent. |
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#define BLEND_SOURCE_OVER_ARGB32_MAIN_SSSE3(dst, src, length, nullVector, half, one, colorMask, alphaMask) { \ |
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int x = 0; \ |
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\ |
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/* First, get dst aligned. */ \ |
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ALIGNMENT_PROLOGUE_16BYTES(dst, x, length) { \ |
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blend_pixel(dst[x], src[x]); \ |
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} \ |
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\ |
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const int minusOffsetToAlignSrcOn16Bytes = (reinterpret_cast<quintptr>(&(src[x])) >> 2) & 0x3;\ |
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\ |
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if (!minusOffsetToAlignSrcOn16Bytes) {\ |
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/* src is aligned, usual algorithm but with aligned operations.\ |
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See the SSE2 version for more documentation on the algorithm itself. */\ |
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const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\ |
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for (; x < length-3; x += 4) { \ |
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const __m128i srcVector = _mm_load_si128((__m128i *)&src[x]); \ |
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const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); \ |
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if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { \ |
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_mm_store_si128((__m128i *)&dst[x], srcVector); \ |
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} else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \ |
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__m128i alphaChannel = _mm_shuffle_epi8(srcVector, alphaShuffleMask); \ |
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alphaChannel = _mm_sub_epi16(one, alphaChannel); \ |
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const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \ |
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__m128i destMultipliedByOneMinusAlpha; \ |
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BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \ |
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const __m128i result = _mm_add_epi8(srcVector, destMultipliedByOneMinusAlpha); \ |
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_mm_store_si128((__m128i *)&dst[x], result); \ |
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} \ |
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} /* end for() */\ |
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} else if ((length - x) >= 8) {\ |
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/* We use two vectors to extract the src: prevLoaded for the first pixels, lastLoaded for the current pixels. */\ |
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__m128i srcVectorPrevLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes]);\ |
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const int palignrOffset = minusOffsetToAlignSrcOn16Bytes << 2;\ |
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\ |
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const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\ |
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switch (palignrOffset) {\ |
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case 4:\ |
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BLENDING_LOOP(4, length)\ |
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break;\ |
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case 8:\ |
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BLENDING_LOOP(8, length)\ |
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break;\ |
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case 12:\ |
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BLENDING_LOOP(12, length)\ |
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break;\ |
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}\ |
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}\ |
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for (; x < length; ++x) \ |
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blend_pixel(dst[x], src[x]); \ |
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} |
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void qt_blend_argb32_on_argb32_ssse3(uchar *destPixels, int dbpl, |
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const uchar *srcPixels, int sbpl, |
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int w, int h, |
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int const_alpha) |
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{ |
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const quint32 *src = (const quint32 *) srcPixels; |
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quint32 *dst = (quint32 *) destPixels; |
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if (const_alpha == 256) { |
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const __m128i alphaMask = _mm_set1_epi32(0xff000000); |
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const __m128i nullVector = _mm_setzero_si128(); |
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const __m128i half = _mm_set1_epi16(0x80); |
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const __m128i one = _mm_set1_epi16(0xff); |
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const __m128i colorMask = _mm_set1_epi32(0x00ff00ff); |
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|
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// We have to unrol the first row in order to deal with the load on unaligned data |
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// prior to the src pointer. |
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BLEND_SOURCE_OVER_ARGB32_FIRST_ROW_SSSE3(dst, src, w, nullVector, half, one, colorMask, alphaMask); |
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dst = (quint32 *)(((uchar *) dst) + dbpl); |
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src = (const quint32 *)(((const uchar *) src) + sbpl); |
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|
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for (int y = 1; y < h; ++y) { |
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BLEND_SOURCE_OVER_ARGB32_MAIN_SSSE3(dst, src, w, nullVector, half, one, colorMask, alphaMask); |
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dst = (quint32 *)(((uchar *) dst) + dbpl); |
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src = (const quint32 *)(((const uchar *) src) + sbpl); |
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} |
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} else if (const_alpha != 0) { |
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// dest = (s + d * sia) * ca + d * cia |
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// = s * ca + d * (sia * ca + cia) |
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// = s * ca + d * (1 - sa*ca) |
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const_alpha = (const_alpha * 255) >> 8; |
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const __m128i nullVector = _mm_setzero_si128(); |
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const __m128i half = _mm_set1_epi16(0x80); |
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const __m128i one = _mm_set1_epi16(0xff); |
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const __m128i colorMask = _mm_set1_epi32(0x00ff00ff); |
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const __m128i constAlphaVector = _mm_set1_epi16(const_alpha); |
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for (int y = 0; y < h; ++y) { |
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BLEND_SOURCE_OVER_ARGB32_WITH_CONST_ALPHA_SSE2(dst, src, w, nullVector, half, one, colorMask, constAlphaVector) |
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dst = (quint32 *)(((uchar *) dst) + dbpl); |
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src = (const quint32 *)(((const uchar *) src) + sbpl); |
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} |
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} |
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} |
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|
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QT_END_NAMESPACE |
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|
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#endif // QT_HAVE_SSSE3 |