author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 18 Aug 2010 10:37:55 +0300 | |
changeset 33 | 3e2da88830cd |
child 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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#ifndef QDRAWINGPRIMITIVE_SSE2_P_H |
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#define QDRAWINGPRIMITIVE_SSE2_P_H |
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|
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#include <private/qsimd_p.h> |
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|
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#ifdef QT_HAVE_SSE2 |
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|
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// |
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// W A R N I N G |
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// ------------- |
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// |
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// This file is not part of the Qt API. It exists purely as an |
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// implementation detail. This header file may change from version to |
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// version without notice, or even be removed. |
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// |
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// We mean it. |
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// |
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|
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QT_BEGIN_NAMESPACE |
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|
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/* |
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* Multiply the components of pixelVector by alphaChannel |
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* Each 32bits components of alphaChannel must be in the form 0x00AA00AA |
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* colorMask must have 0x00ff00ff on each 32 bits component |
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* half must have the value 128 (0x80) for each 32 bits compnent |
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*/ |
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#define BYTE_MUL_SSE2(result, pixelVector, alphaChannel, colorMask, half) \ |
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{ \ |
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/* 1. separate the colors in 2 vectors so each color is on 16 bits \ |
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(in order to be multiplied by the alpha \ |
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each 32 bit of dstVectorAG are in the form 0x00AA00GG \ |
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each 32 bit of dstVectorRB are in the form 0x00RR00BB */\ |
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__m128i pixelVectorAG = _mm_srli_epi16(pixelVector, 8); \ |
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__m128i pixelVectorRB = _mm_and_si128(pixelVector, colorMask); \ |
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\ |
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/* 2. multiply the vectors by the alpha channel */\ |
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pixelVectorAG = _mm_mullo_epi16(pixelVectorAG, alphaChannel); \ |
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pixelVectorRB = _mm_mullo_epi16(pixelVectorRB, alphaChannel); \ |
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80 |
\ |
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/* 3. devide by 255, that's the tricky part. \ |
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we do it like for BYTE_MUL(), with bit shift: X/255 ~= (X + X/256 + rounding)/256 */ \ |
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/** so first (X + X/256 + rounding) */\ |
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pixelVectorRB = _mm_add_epi16(pixelVectorRB, _mm_srli_epi16(pixelVectorRB, 8)); \ |
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pixelVectorRB = _mm_add_epi16(pixelVectorRB, half); \ |
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pixelVectorAG = _mm_add_epi16(pixelVectorAG, _mm_srli_epi16(pixelVectorAG, 8)); \ |
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pixelVectorAG = _mm_add_epi16(pixelVectorAG, half); \ |
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\ |
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/** second devide by 256 */\ |
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pixelVectorRB = _mm_srli_epi16(pixelVectorRB, 8); \ |
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/** for AG, we could >> 8 to divide followed by << 8 to put the \ |
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bytes in the correct position. By masking instead, we execute \ |
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only one instruction */\ |
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pixelVectorAG = _mm_andnot_si128(colorMask, pixelVectorAG); \ |
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\ |
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/* 4. combine the 2 pairs of colors */ \ |
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result = _mm_or_si128(pixelVectorAG, pixelVectorRB); \ |
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} |
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|
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/* |
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* Each 32bits components of alphaChannel must be in the form 0x00AA00AA |
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* oneMinusAlphaChannel must be 255 - alpha for each 32 bits component |
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103 |
* colorMask must have 0x00ff00ff on each 32 bits component |
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104 |
* half must have the value 128 (0x80) for each 32 bits compnent |
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105 |
*/ |
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106 |
#define INTERPOLATE_PIXEL_255_SSE2(result, srcVector, dstVector, alphaChannel, oneMinusAlphaChannel, colorMask, half) { \ |
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107 |
/* interpolate AG */\ |
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108 |
__m128i srcVectorAG = _mm_srli_epi16(srcVector, 8); \ |
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109 |
__m128i dstVectorAG = _mm_srli_epi16(dstVector, 8); \ |
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__m128i srcVectorAGalpha = _mm_mullo_epi16(srcVectorAG, alphaChannel); \ |
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111 |
__m128i dstVectorAGoneMinusAlphalpha = _mm_mullo_epi16(dstVectorAG, oneMinusAlphaChannel); \ |
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112 |
__m128i finalAG = _mm_add_epi16(srcVectorAGalpha, dstVectorAGoneMinusAlphalpha); \ |
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113 |
finalAG = _mm_add_epi16(finalAG, _mm_srli_epi16(finalAG, 8)); \ |
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114 |
finalAG = _mm_add_epi16(finalAG, half); \ |
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115 |
finalAG = _mm_andnot_si128(colorMask, finalAG); \ |
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116 |
\ |
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117 |
/* interpolate RB */\ |
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118 |
__m128i srcVectorRB = _mm_and_si128(srcVector, colorMask); \ |
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__m128i dstVectorRB = _mm_and_si128(dstVector, colorMask); \ |
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__m128i srcVectorRBalpha = _mm_mullo_epi16(srcVectorRB, alphaChannel); \ |
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__m128i dstVectorRBoneMinusAlphalpha = _mm_mullo_epi16(dstVectorRB, oneMinusAlphaChannel); \ |
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__m128i finalRB = _mm_add_epi16(srcVectorRBalpha, dstVectorRBoneMinusAlphalpha); \ |
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finalRB = _mm_add_epi16(finalRB, _mm_srli_epi16(finalRB, 8)); \ |
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finalRB = _mm_add_epi16(finalRB, half); \ |
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finalRB = _mm_srli_epi16(finalRB, 8); \ |
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126 |
\ |
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127 |
/* combine */\ |
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128 |
result = _mm_or_si128(finalAG, finalRB); \ |
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129 |
} |
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130 |
|
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131 |
// Basically blend src over dst with the const alpha defined as constAlphaVector. |
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132 |
// 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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139 |
// 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_SSE2(dst, src, length, nullVector, half, one, colorMask, alphaMask) { \ |
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int x = 0; \ |
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144 |
\ |
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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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for (; x < prologLength; ++x) { \ |
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uint s = src[x]; \ |
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if (s >= 0xff000000) \ |
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dst[x] = s; \ |
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else if (s != 0) \ |
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dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s)); \ |
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} \ |
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155 |
\ |
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for (; x < length-3; x += 4) { \ |
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const __m128i srcVector = _mm_loadu_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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/* all opaque */ \ |
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_mm_store_si128((__m128i *)&dst[x], srcVector); \ |
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162 |
} else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \ |
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/* not fully transparent */ \ |
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/* extract the alpha channel on 2 x 16 bits */ \ |
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/* so we have room for the multiplication */ \ |
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/* each 32 bits will be in the form 0x00AA00AA */ \ |
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/* with A being the 1 - alpha */ \ |
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__m128i alphaChannel = _mm_srli_epi32(srcVector, 24); \ |
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alphaChannel = _mm_or_si128(alphaChannel, _mm_slli_epi32(alphaChannel, 16)); \ |
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alphaChannel = _mm_sub_epi16(one, alphaChannel); \ |
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171 |
\ |
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const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \ |
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__m128i destMultipliedByOneMinusAlpha; \ |
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174 |
BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \ |
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175 |
\ |
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/* result = s + d * (1-alpha) */\ |
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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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} \ |
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181 |
for (; x < length; ++x) { \ |
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uint s = src[x]; \ |
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if (s >= 0xff000000) \ |
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dst[x] = s; \ |
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else if (s != 0) \ |
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dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s)); \ |
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} \ |
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} |
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189 |
|
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// Basically blend src over dst with the const alpha defined as constAlphaVector. |
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191 |
// 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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// |
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// The computation being done is: |
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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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#define BLEND_SOURCE_OVER_ARGB32_WITH_CONST_ALPHA_SSE2(dst, src, length, nullVector, half, one, colorMask, constAlphaVector) \ |
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{ \ |
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int x = 0; \ |
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\ |
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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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for (; x < prologLength; ++x) { \ |
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quint32 s = src[x]; \ |
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if (s != 0) { \ |
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s = BYTE_MUL(s, const_alpha); \ |
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dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s)); \ |
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} \ |
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} \ |
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\ |
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for (; x < length-3; x += 4) { \ |
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__m128i srcVector = _mm_loadu_si128((__m128i *)&src[x]); \ |
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if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVector, nullVector)) != 0xffff) { \ |
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BYTE_MUL_SSE2(srcVector, srcVector, constAlphaVector, colorMask, half); \ |
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\ |
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__m128i alphaChannel = _mm_srli_epi32(srcVector, 24); \ |
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alphaChannel = _mm_or_si128(alphaChannel, _mm_slli_epi32(alphaChannel, 16)); \ |
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alphaChannel = _mm_sub_epi16(one, alphaChannel); \ |
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\ |
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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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\ |
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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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} \ |
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for (; x < length; ++x) { \ |
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quint32 s = src[x]; \ |
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if (s != 0) { \ |
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s = BYTE_MUL(s, const_alpha); \ |
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dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s)); \ |
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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_SSE2 |
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|
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#endif // QDRAWINGPRIMITIVE_SSE2_P_H |