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author | Qt by Nokia <qt-info@nokia.com> | 2011-04-27 12:05:43 +0200 |
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committer | axis <qt-info@nokia.com> | 2011-04-27 12:05:43 +0200 |
commit | 38be0d13830efd2d98281c645c3a60afe05ffece (patch) | |
tree | 6ea73f3ec77f7d153333779883e8120f82820abe /src/gui/image/qimage_sse2.cpp |
Initial import from the monolithic Qt.
This is the beginning of revision history for this module. If you
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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12
Diffstat (limited to 'src/gui/image/qimage_sse2.cpp')
-rw-r--r-- | src/gui/image/qimage_sse2.cpp | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/gui/image/qimage_sse2.cpp b/src/gui/image/qimage_sse2.cpp new file mode 100644 index 0000000000..e9bbb6fa36 --- /dev/null +++ b/src/gui/image/qimage_sse2.cpp @@ -0,0 +1,109 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qimage.h" +#include <private/qimage_p.h> +#include <private/qsimd_p.h> +#include <private/qdrawhelper_p.h> +#include <private/qdrawingprimitive_sse2_p.h> + +#ifdef QT_HAVE_SSE2 + +QT_BEGIN_NAMESPACE + +bool convert_ARGB_to_ARGB_PM_inplace_sse2(QImageData *data, Qt::ImageConversionFlags) +{ + Q_ASSERT(data->format == QImage::Format_ARGB32); + + // extra pixels on each line + const int spare = data->width & 3; + // width in pixels of the pad at the end of each line + const int pad = (data->bytes_per_line >> 2) - data->width; + const int iter = data->width >> 2; + int height = data->height; + + const __m128i alphaMask = _mm_set1_epi32(0xff000000); + const __m128i nullVector = _mm_setzero_si128(); + const __m128i half = _mm_set1_epi16(0x80); + const __m128i colorMask = _mm_set1_epi32(0x00ff00ff); + + __m128i *d = reinterpret_cast<__m128i*>(data->data); + while (height--) { + const __m128i *end = d + iter; + + for (; d != end; ++d) { + const __m128i srcVector = _mm_loadu_si128(d); + const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); + if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { + // opaque, data is unchanged + } else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) == 0xffff) { + // fully transparent + _mm_storeu_si128(d, nullVector); + } else { + __m128i alphaChannel = _mm_srli_epi32(srcVector, 24); + alphaChannel = _mm_or_si128(alphaChannel, _mm_slli_epi32(alphaChannel, 16)); + + __m128i result; + BYTE_MUL_SSE2(result, srcVector, alphaChannel, colorMask, half); + result = _mm_or_si128(_mm_andnot_si128(alphaMask, result), srcVectorAlpha); + _mm_storeu_si128(d, result); + } + } + + QRgb *p = reinterpret_cast<QRgb*>(d); + QRgb *pe = p+spare; + for (; p != pe; ++p) { + if (*p < 0x00ffffff) + *p = 0; + else if (*p < 0xff000000) + *p = PREMUL(*p); + } + + d = reinterpret_cast<__m128i*>(p+pad); + } + + data->format = QImage::Format_ARGB32_Premultiplied; + return true; +} + +QT_END_NAMESPACE + +#endif // QT_HAVE_SSE2 |