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author | axis <qt-info@nokia.com> | 2010-02-16 11:53:07 (GMT) |
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committer | axis <qt-info@nokia.com> | 2010-02-16 11:53:07 (GMT) |
commit | 15b08dffc1354bc816b04901a7442679382b0935 (patch) | |
tree | 783af85b75f9de3ab10902c5ba66cf5e22b2fe61 /src/plugins/imageformats | |
parent | 9f5b02406f38fe02a27de7843b9f8a11232d2064 (diff) | |
parent | 9d174f13e48730ac06aa429e0f011a02b333025e (diff) | |
download | Qt-15b08dffc1354bc816b04901a7442679382b0935.zip Qt-15b08dffc1354bc816b04901a7442679382b0935.tar.gz Qt-15b08dffc1354bc816b04901a7442679382b0935.tar.bz2 |
Merge branch 'master' of scm.dev.nokia.troll.no:qt/qt-s60-public
Conflicts:
configure
mkspecs/common/symbian/symbian.conf
mkspecs/features/symbian/application_icon.prf
qmake/generators/makefile.cpp
qmake/generators/symbian/initprojectdeploy_symbian.cpp
qmake/generators/symbian/symmake.cpp
tools/assistant/tools/assistant/assistant.pro
Diffstat (limited to 'src/plugins/imageformats')
-rw-r--r-- | src/plugins/imageformats/jpeg/qjpeghandler.cpp | 574 |
1 files changed, 67 insertions, 507 deletions
diff --git a/src/plugins/imageformats/jpeg/qjpeghandler.cpp b/src/plugins/imageformats/jpeg/qjpeghandler.cpp index 6cb93ad..4b4712c 100644 --- a/src/plugins/imageformats/jpeg/qjpeghandler.cpp +++ b/src/plugins/imageformats/jpeg/qjpeghandler.cpp @@ -52,8 +52,6 @@ #undef FAR #endif -// hw: optimize smoothscaler for returning 24-bit images - // including jpeglib.h seems to be a little messy extern "C" { // mingw includes rpcndr.h but does not define boolean @@ -76,433 +74,6 @@ extern "C" { QT_BEGIN_NAMESPACE -//#define QT_NO_IMAGE_SMOOTHSCALE -#ifndef QT_NO_IMAGE_SMOOTHSCALE -class QImageSmoothScalerPrivate; -class QImageSmoothScaler -{ -public: - QImageSmoothScaler(const int w, const int h, const QImage &src); - QImageSmoothScaler(const int srcWidth, const int srcHeight, - const int dstWidth, const int dstHeight); - - virtual ~QImageSmoothScaler(void); - - QImage scale(); - -private: - QImageSmoothScalerPrivate *d; - virtual QRgb *scanLine(const int line = 0, const QImage *src = 0); -}; - -class QImageSmoothScalerPrivate -{ -public: - int cols; - int newcols; - int rows; - int newrows; - bool hasAlpha; - - const QImage *src; - - void setup(const int srcWidth, const int srcHeight, const int dstWidth, - const int dstHeight, bool hasAlphaChannel); -}; - -QImageSmoothScaler::QImageSmoothScaler(const int w, const int h, - const QImage &src) -{ - d = new QImageSmoothScalerPrivate; - - d->setup(src.width(), src.height(), w, h, src.hasAlphaChannel() ); - this->d->src = &src; -} - -QImageSmoothScaler::QImageSmoothScaler(const int srcWidth, const int srcHeight, - const int dstWidth, const int dstHeight) -{ - d = new QImageSmoothScalerPrivate; - d->setup(srcWidth, srcHeight, dstWidth, dstHeight, 0); -} - -void QImageSmoothScalerPrivate::setup(const int srcWidth, const int srcHeight, - const int dstWidth, const int dstHeight, - bool hasAlphaChannel) -{ - cols = srcWidth; - rows = srcHeight; - newcols = dstWidth; - newrows = dstHeight; - hasAlpha = hasAlphaChannel; -} - -QImageSmoothScaler::~QImageSmoothScaler() -{ - delete d; -} - -inline QRgb *QImageSmoothScaler::scanLine(const int line, const QImage *src) -{ - return (QRgb*)src->scanLine(line); -} - -/* - This function uses code based on pnmscale.c by Jef Poskanzer. - - pnmscale.c - read a portable anymap and scale it - - Copyright (C) 1989, 1991 by Jef Poskanzer. - - Permission to use, copy, modify, and distribute this software and its - documentation for any purpose and without fee is hereby granted, provided - that the above copyright notice appear in all copies and that both that - copyright notice and this permission notice appear in supporting - documentation. This software is provided "as is" without express or - implied warranty. -*/ - -QImage QImageSmoothScaler::scale() -{ - long SCALE; - long HALFSCALE; - QRgb *xelrow = 0; - QRgb *tempxelrow = 0; - QRgb *xP; - QRgb *nxP; - int row, rowsread; - int col, needtoreadrow; - uchar maxval = 255; - qreal xscale, yscale; - long sxscale, syscale; - long fracrowtofill, fracrowleft; - long *as; - long *rs; - long *gs; - long *bs; - int rowswritten = 0; - QImage dst; - - if (d->cols > 4096) { - SCALE = 4096; - HALFSCALE = 2048; - } else { - int fac = 4096; - while (d->cols * fac > 4096) - fac /= 2; - - SCALE = fac * d->cols; - HALFSCALE = fac * d->cols / 2; - } - - xscale = (qreal)d->newcols / (qreal)d->cols; - yscale = (qreal)d->newrows / (qreal)d->rows; - sxscale = (long)(xscale * SCALE); - syscale = (long)(yscale * SCALE); - - // shortcut Y scaling if possible - if (d->newrows != d->rows) - tempxelrow = new QRgb[d->cols]; - - if (d->hasAlpha) { - as = new long[d->cols]; - for (col = 0; col < d->cols; ++col) - as[col] = HALFSCALE; - } else { - as = 0; - } - rs = new long[d->cols]; - gs = new long[d->cols]; - bs = new long[d->cols]; - rowsread = 0; - fracrowleft = syscale; - needtoreadrow = 1; - for (col = 0; col < d->cols; ++col) - rs[col] = gs[col] = bs[col] = HALFSCALE; - fracrowtofill = SCALE; - - dst = QImage(d->newcols, d->newrows, d->hasAlpha ? QImage::Format_ARGB32 : QImage::Format_RGB32); - - for (row = 0; row < d->newrows; ++row) { - // First scale Y from xelrow into tempxelrow. - if (d->newrows == d->rows) { - // shortcut Y scaling if possible - tempxelrow = xelrow = scanLine(rowsread++, d->src); - } else { - while (fracrowleft < fracrowtofill) { - if (needtoreadrow && rowsread < d->rows) - xelrow = scanLine(rowsread++, d->src); - for (col = 0, xP = xelrow; col < d->cols; ++col, ++xP) { - if (as) { - as[col] += fracrowleft * qAlpha(*xP); - rs[col] += fracrowleft * qRed(*xP) * qAlpha(*xP) / 255; - gs[col] += fracrowleft * qGreen(*xP) * qAlpha(*xP) / 255; - bs[col] += fracrowleft * qBlue(*xP) * qAlpha(*xP) / 255; - } else { - rs[col] += fracrowleft * qRed(*xP); - gs[col] += fracrowleft * qGreen(*xP); - bs[col] += fracrowleft * qBlue(*xP); - } - } - fracrowtofill -= fracrowleft; - fracrowleft = syscale; - needtoreadrow = 1; - } - // Now fracrowleft is >= fracrowtofill, so we can produce a row. - if (needtoreadrow && rowsread < d->rows) { - xelrow = scanLine(rowsread++, d->src); - needtoreadrow = 0; - } - for (col = 0, xP = xelrow, nxP = tempxelrow; col < d->cols; ++col, ++xP, ++nxP) { - register long a, r, g, b; - - if (as) { - r = rs[col] + fracrowtofill * qRed(*xP) * qAlpha(*xP) / 255; - g = gs[col] + fracrowtofill * qGreen(*xP) * qAlpha(*xP) / 255; - b = bs[col] + fracrowtofill * qBlue(*xP) * qAlpha(*xP) / 255; - a = as[col] + fracrowtofill * qAlpha(*xP); - if (a) { - r = r * 255 / a * SCALE; - g = g * 255 / a * SCALE; - b = b * 255 / a * SCALE; - } - } else { - r = rs[col] + fracrowtofill * qRed(*xP); - g = gs[col] + fracrowtofill * qGreen(*xP); - b = bs[col] + fracrowtofill * qBlue(*xP); - a = 0; // unwarn - } - r /= SCALE; - if (r > maxval) - r = maxval; - g /= SCALE; - if (g > maxval) - g = maxval; - b /= SCALE; - if (b > maxval) - b = maxval; - if (as) { - a /= SCALE; - if (a > maxval) - a = maxval; - *nxP = qRgba((int)r, (int)g, (int)b, (int)a); - as[col] = HALFSCALE; - } else { - *nxP = qRgb((int)r, (int)g, (int)b); - } - rs[col] = gs[col] = bs[col] = HALFSCALE; - } - fracrowleft -= fracrowtofill; - if (fracrowleft == 0) { - fracrowleft = syscale; - needtoreadrow = 1; - } - fracrowtofill = SCALE; - } - - // Now scale X from tempxelrow into dst and write it out. - if (d->newcols == d->cols) { - // shortcut X scaling if possible - memcpy(dst.scanLine(rowswritten++), tempxelrow, d->newcols * 4); - } else { - register long a, r, g, b; - register long fraccoltofill, fraccolleft = 0; - register int needcol; - - nxP = (QRgb *)dst.scanLine(rowswritten++); - QRgb *nxPEnd = nxP + d->newcols; - fraccoltofill = SCALE; - a = r = g = b = HALFSCALE; - needcol = 0; - for (col = 0, xP = tempxelrow; col < d->cols; ++col, ++xP) { - fraccolleft = sxscale; - while (fraccolleft >= fraccoltofill) { - if (needcol) { - ++nxP; - a = r = g = b = HALFSCALE; - } - if (as) { - r += fraccoltofill * qRed(*xP) * qAlpha(*xP) / 255; - g += fraccoltofill * qGreen(*xP) * qAlpha(*xP) / 255; - b += fraccoltofill * qBlue(*xP) * qAlpha(*xP) / 255; - a += fraccoltofill * qAlpha(*xP); - if (a) { - r = r * 255 / a * SCALE; - g = g * 255 / a * SCALE; - b = b * 255 / a * SCALE; - } - } else { - r += fraccoltofill * qRed(*xP); - g += fraccoltofill * qGreen(*xP); - b += fraccoltofill * qBlue(*xP); - } - r /= SCALE; - if (r > maxval) - r = maxval; - g /= SCALE; - if (g > maxval) - g = maxval; - b /= SCALE; - if (b > maxval) - b = maxval; - if (as) { - a /= SCALE; - if (a > maxval) - a = maxval; - *nxP = qRgba((int)r, (int)g, (int)b, (int)a); - } else { - *nxP = qRgb((int)r, (int)g, (int)b); - } - fraccolleft -= fraccoltofill; - fraccoltofill = SCALE; - needcol = 1; - } - if (fraccolleft > 0) { - if (needcol) { - ++nxP; - a = r = g = b = HALFSCALE; - needcol = 0; - } - if (as) { - a += fraccolleft * qAlpha(*xP); - r += fraccolleft * qRed(*xP) * qAlpha(*xP) / 255; - g += fraccolleft * qGreen(*xP) * qAlpha(*xP) / 255; - b += fraccolleft * qBlue(*xP) * qAlpha(*xP) / 255; - } else { - r += fraccolleft * qRed(*xP); - g += fraccolleft * qGreen(*xP); - b += fraccolleft * qBlue(*xP); - } - fraccoltofill -= fraccolleft; - } - } - if (fraccoltofill > 0) { - --xP; - if (as) { - a += fraccolleft * qAlpha(*xP); - r += fraccoltofill * qRed(*xP) * qAlpha(*xP) / 255; - g += fraccoltofill * qGreen(*xP) * qAlpha(*xP) / 255; - b += fraccoltofill * qBlue(*xP) * qAlpha(*xP) / 255; - if (a) { - r = r * 255 / a * SCALE; - g = g * 255 / a * SCALE; - b = b * 255 / a * SCALE; - } - } else { - r += fraccoltofill * qRed(*xP); - g += fraccoltofill * qGreen(*xP); - b += fraccoltofill * qBlue(*xP); - } - } - if (nxP < nxPEnd) { - r /= SCALE; - if (r > maxval) - r = maxval; - g /= SCALE; - if (g > maxval) - g = maxval; - b /= SCALE; - if (b > maxval) - b = maxval; - if (as) { - a /= SCALE; - if (a > maxval) - a = maxval; - *nxP = qRgba((int)r, (int)g, (int)b, (int)a); - } else { - *nxP = qRgb((int)r, (int)g, (int)b); - } - while (++nxP != nxPEnd) - nxP[0] = nxP[-1]; - } - } - } - - if (d->newrows != d->rows && tempxelrow)// Robust, tempxelrow might be 0 1 day - delete [] tempxelrow; - if (as) // Avoid purify complaint - delete [] as; - if (rs) // Robust, rs might be 0 one day - delete [] rs; - if (gs) // Robust, gs might be 0 one day - delete [] gs; - if (bs) // Robust, bs might be 0 one day - delete [] bs; - - return dst; -} - -class jpegSmoothScaler : public QImageSmoothScaler -{ -public: - jpegSmoothScaler(struct jpeg_decompress_struct *info, const QSize& dstSize, const QRect& clipRect) - : QImageSmoothScaler(clipRect.width(), clipRect.height(), - dstSize.width(), dstSize.height()) - { - cinfo = info; - clip = clipRect; - imageCache = QImage(info->output_width, 1, QImage::Format_RGB32); - } - -private: - QRect clip; - QImage imageCache; - struct jpeg_decompress_struct *cinfo; - - QRgb *scanLine(const int line = 0, const QImage *src = 0) - { - QRgb *out; - uchar *in; - - Q_UNUSED(line); - Q_UNUSED(src); - - uchar* data = imageCache.bits(); - - // Read ahead if we haven't reached the first clipped scanline yet. - while (int(cinfo->output_scanline) < clip.y() && - cinfo->output_scanline < cinfo->output_height) - jpeg_read_scanlines(cinfo, &data, 1); - - // Read the next scanline. We assume that "line" - // will never be >= clip.height(). - jpeg_read_scanlines(cinfo, &data, 1); - if (cinfo->output_scanline == cinfo->output_height) - jpeg_finish_decompress(cinfo); - - out = ((QRgb*)data) + clip.x(); - - // - // The smooth scale algorithm only works on 32-bit images; - // convert from (8|24) bits to 32. - // - if (cinfo->output_components == 1) { - in = data + clip.right(); - for (int i = clip.width(); i--; ) { - out[i] = qRgb(*in, *in, *in); - in--; - } - } else if (cinfo->out_color_space == JCS_CMYK) { - in = data + clip.right() * 4; - for (int i = clip.width(); i--; ) { - int k = in[3]; - out[i] = qRgb(k * in[0] / 255, k * in[1] / 255, k * in[2] / 255); - in -= 4; - } - } else { - in = data + clip.right() * 3; - for (int i = clip.width(); i--; ) { - out[i] = qRgb(in[0], in[1], in[2]); - in -= 3; - } - } - - return out; - } - -}; -#endif - struct my_error_mgr : public jpeg_error_mgr { jmp_buf setjmp_buffer; }; @@ -844,93 +415,82 @@ static bool read_jpeg_image(QIODevice *device, QImage *outImage, clip = clip.intersected(imageRect); } -#ifndef QT_NO_IMAGE_SMOOTHSCALE - if (scaledSize.isValid() && scaledSize != clip.size() - && quality >= HIGH_QUALITY_THRESHOLD) { + // Allocate memory for the clipped QImage. + if (!ensureValidImage(outImage, &cinfo, clip.size())) + longjmp(jerr.setjmp_buffer, 1); + + // Avoid memcpy() overhead if grayscale with no clipping. + bool quickGray = (cinfo.output_components == 1 && + clip == imageRect); + if (!quickGray) { + // Ask the jpeg library to allocate a temporary row. + // The library will automatically delete it for us later. + // The libjpeg docs say we should do this before calling + // jpeg_start_decompress(). We can't use "new" here + // because we are inside the setjmp() block and an error + // in the jpeg input stream would cause a memory leak. + JSAMPARRAY rows = (cinfo.mem->alloc_sarray) + ((j_common_ptr)&cinfo, JPOOL_IMAGE, + cinfo.output_width * cinfo.output_components, 1); (void) jpeg_start_decompress(&cinfo); - jpegSmoothScaler scaler(&cinfo, scaledSize, clip); - *outImage = scaler.scale(); - } else -#endif - { - // Allocate memory for the clipped QImage. - if (!ensureValidImage(outImage, &cinfo, clip.size())) - longjmp(jerr.setjmp_buffer, 1); - - // Avoid memcpy() overhead if grayscale with no clipping. - bool quickGray = (cinfo.output_components == 1 && - clip == imageRect); - if (!quickGray) { - // Ask the jpeg library to allocate a temporary row. - // The library will automatically delete it for us later. - // The libjpeg docs say we should do this before calling - // jpeg_start_decompress(). We can't use "new" here - // because we are inside the setjmp() block and an error - // in the jpeg input stream would cause a memory leak. - JSAMPARRAY rows = (cinfo.mem->alloc_sarray) - ((j_common_ptr)&cinfo, JPOOL_IMAGE, - cinfo.output_width * cinfo.output_components, 1); - - (void) jpeg_start_decompress(&cinfo); - - while (cinfo.output_scanline < cinfo.output_height) { - int y = int(cinfo.output_scanline) - clip.y(); - if (y >= clip.height()) - break; // We've read the entire clip region, so abort. - - (void) jpeg_read_scanlines(&cinfo, rows, 1); - - if (y < 0) - continue; // Haven't reached the starting line yet. - - if (cinfo.output_components == 3) { - // Expand 24->32 bpp. - uchar *in = rows[0] + clip.x() * 3; - QRgb *out = (QRgb*)outImage->scanLine(y); - for (int i = 0; i < clip.width(); ++i) { - *out++ = qRgb(in[0], in[1], in[2]); - in += 3; - } - } else if (cinfo.out_color_space == JCS_CMYK) { - // Convert CMYK->RGB. - uchar *in = rows[0] + clip.x() * 4; - QRgb *out = (QRgb*)outImage->scanLine(y); - for (int i = 0; i < clip.width(); ++i) { - int k = in[3]; - *out++ = qRgb(k * in[0] / 255, k * in[1] / 255, - k * in[2] / 255); - in += 4; - } - } else if (cinfo.output_components == 1) { - // Grayscale. - memcpy(outImage->scanLine(y), - rows[0] + clip.x(), clip.width()); + while (cinfo.output_scanline < cinfo.output_height) { + int y = int(cinfo.output_scanline) - clip.y(); + if (y >= clip.height()) + break; // We've read the entire clip region, so abort. + + (void) jpeg_read_scanlines(&cinfo, rows, 1); + + if (y < 0) + continue; // Haven't reached the starting line yet. + + if (cinfo.output_components == 3) { + // Expand 24->32 bpp. + uchar *in = rows[0] + clip.x() * 3; + QRgb *out = (QRgb*)outImage->scanLine(y); + for (int i = 0; i < clip.width(); ++i) { + *out++ = qRgb(in[0], in[1], in[2]); + in += 3; } - } - } else { - // Load unclipped grayscale data directly into the QImage. - (void) jpeg_start_decompress(&cinfo); - while (cinfo.output_scanline < cinfo.output_height) { - uchar *row = outImage->scanLine(cinfo.output_scanline); - (void) jpeg_read_scanlines(&cinfo, &row, 1); + } else if (cinfo.out_color_space == JCS_CMYK) { + // Convert CMYK->RGB. + uchar *in = rows[0] + clip.x() * 4; + QRgb *out = (QRgb*)outImage->scanLine(y); + for (int i = 0; i < clip.width(); ++i) { + int k = in[3]; + *out++ = qRgb(k * in[0] / 255, k * in[1] / 255, + k * in[2] / 255); + in += 4; + } + } else if (cinfo.output_components == 1) { + // Grayscale. + memcpy(outImage->scanLine(y), + rows[0] + clip.x(), clip.width()); } } + } else { + // Load unclipped grayscale data directly into the QImage. + (void) jpeg_start_decompress(&cinfo); + while (cinfo.output_scanline < cinfo.output_height) { + uchar *row = outImage->scanLine(cinfo.output_scanline); + (void) jpeg_read_scanlines(&cinfo, &row, 1); + } + } - if (cinfo.output_scanline == cinfo.output_height) - (void) jpeg_finish_decompress(&cinfo); + if (cinfo.output_scanline == cinfo.output_height) + (void) jpeg_finish_decompress(&cinfo); - if (cinfo.density_unit == 1) { - outImage->setDotsPerMeterX(int(100. * cinfo.X_density / 2.54)); - outImage->setDotsPerMeterY(int(100. * cinfo.Y_density / 2.54)); - } else if (cinfo.density_unit == 2) { - outImage->setDotsPerMeterX(int(100. * cinfo.X_density)); - outImage->setDotsPerMeterY(int(100. * cinfo.Y_density)); - } + if (cinfo.density_unit == 1) { + outImage->setDotsPerMeterX(int(100. * cinfo.X_density / 2.54)); + outImage->setDotsPerMeterY(int(100. * cinfo.Y_density / 2.54)); + } else if (cinfo.density_unit == 2) { + outImage->setDotsPerMeterX(int(100. * cinfo.X_density)); + outImage->setDotsPerMeterY(int(100. * cinfo.Y_density)); + } - if (scaledSize.isValid() && scaledSize != clip.size()) - *outImage = outImage->scaled(scaledSize, Qt::IgnoreAspectRatio, Qt::FastTransformation); + if (scaledSize.isValid() && scaledSize != clip.size()) { + *outImage = outImage->scaled(scaledSize, Qt::IgnoreAspectRatio, quality >= HIGH_QUALITY_THRESHOLD ? Qt::SmoothTransformation : Qt::FastTransformation); } } |