/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** This file is part of the QtGui module of the Qt Toolkit. | |
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** GNU Lesser General Public License Usage | |
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** | |
** GNU General Public License Usage | |
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****************************************************************************/ | |
#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 |