| /**************************************************************************** | |
| ** | |
| ** 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 plugins of the Qt Toolkit. | |
| ** | |
| ** $QT_BEGIN_LICENSE:LGPL$ | |
| ** GNU Lesser General Public License Usage | |
| ** 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. | |
| ** | |
| ** GNU General Public License Usage | |
| ** Alternatively, this file may be used under the terms of the GNU General | |
| ** Public License version 3.0 as published by the Free Software Foundation | |
| ** and appearing in the file LICENSE.GPL included in the packaging of this | |
| ** file. Please review the following information to ensure the GNU General | |
| ** Public License version 3.0 requirements will be met: | |
| ** http://www.gnu.org/copyleft/gpl.html. | |
| ** | |
| ** Other Usage | |
| ** Alternatively, this file may be used in accordance with the terms and | |
| ** conditions contained in a signed written agreement between you and Nokia. | |
| ** | |
| ** | |
| ** | |
| ** | |
| ** | |
| ** $QT_END_LICENSE$ | |
| ** | |
| ****************************************************************************/ | |
| #include "qjpeghandler_p.h" | |
| #include <qimage.h> | |
| #include <qvariant.h> | |
| #include <qvector.h> | |
| #include <qbuffer.h> | |
| #include <private/qsimd_p.h> | |
| #include <stdio.h> // jpeglib needs this to be pre-included | |
| #include <setjmp.h> | |
| #ifdef FAR | |
| #undef FAR | |
| #endif | |
| // including jpeglib.h seems to be a little messy | |
| extern "C" { | |
| // mingw includes rpcndr.h but does not define boolean | |
| #if defined(Q_OS_WIN) && defined(Q_CC_GNU) | |
| # if defined(__RPCNDR_H__) && !defined(boolean) | |
| typedef unsigned char boolean; | |
| # define HAVE_BOOLEAN | |
| # endif | |
| #endif | |
| #define XMD_H // shut JPEGlib up | |
| #if defined(Q_OS_UNIXWARE) | |
| # define HAVE_BOOLEAN // libjpeg under Unixware seems to need this | |
| #endif | |
| #include <jpeglib.h> | |
| #ifdef const | |
| # undef const // remove crazy C hackery in jconfig.h | |
| #endif | |
| } | |
| QT_BEGIN_NAMESPACE | |
| void QT_FASTCALL convert_rgb888_to_rgb32_C(quint32 *dst, const uchar *src, int len) | |
| { | |
| // Expand 24->32 bpp. | |
| for (int i = 0; i < len; ++i) { | |
| *dst++ = qRgb(src[0], src[1], src[2]); | |
| src += 3; | |
| } | |
| } | |
| typedef void (QT_FASTCALL *Rgb888ToRgb32Converter)(quint32 *dst, const uchar *src, int len); | |
| static Rgb888ToRgb32Converter rgb888ToRgb32ConverterPtr = convert_rgb888_to_rgb32_C; | |
| struct my_error_mgr : public jpeg_error_mgr { | |
| jmp_buf setjmp_buffer; | |
| }; | |
| #if defined(Q_C_CALLBACKS) | |
| extern "C" { | |
| #endif | |
| static void my_error_exit (j_common_ptr cinfo) | |
| { | |
| my_error_mgr* myerr = (my_error_mgr*) cinfo->err; | |
| char buffer[JMSG_LENGTH_MAX]; | |
| (*cinfo->err->format_message)(cinfo, buffer); | |
| qWarning("%s", buffer); | |
| longjmp(myerr->setjmp_buffer, 1); | |
| } | |
| #if defined(Q_C_CALLBACKS) | |
| } | |
| #endif | |
| static const int max_buf = 4096; | |
| struct my_jpeg_source_mgr : public jpeg_source_mgr { | |
| // Nothing dynamic - cannot rely on destruction over longjump | |
| QIODevice *device; | |
| JOCTET buffer[max_buf]; | |
| const QBuffer *memDevice; | |
| public: | |
| my_jpeg_source_mgr(QIODevice *device); | |
| }; | |
| #if defined(Q_C_CALLBACKS) | |
| extern "C" { | |
| #endif | |
| static void qt_init_source(j_decompress_ptr) | |
| { | |
| } | |
| static boolean qt_fill_input_buffer(j_decompress_ptr cinfo) | |
| { | |
| my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src; | |
| qint64 num_read = 0; | |
| if (src->memDevice) { | |
| src->next_input_byte = (const JOCTET *)(src->memDevice->data().constData() + src->memDevice->pos()); | |
| num_read = src->memDevice->data().size() - src->memDevice->pos(); | |
| src->device->seek(src->memDevice->data().size()); | |
| } else { | |
| src->next_input_byte = src->buffer; | |
| num_read = src->device->read((char*)src->buffer, max_buf); | |
| } | |
| if (num_read <= 0) { | |
| // Insert a fake EOI marker - as per jpeglib recommendation | |
| src->next_input_byte = src->buffer; | |
| src->buffer[0] = (JOCTET) 0xFF; | |
| src->buffer[1] = (JOCTET) JPEG_EOI; | |
| src->bytes_in_buffer = 2; | |
| } else { | |
| src->bytes_in_buffer = num_read; | |
| } | |
| #if defined(Q_OS_UNIXWARE) | |
| return B_TRUE; | |
| #else | |
| return true; | |
| #endif | |
| } | |
| static void qt_skip_input_data(j_decompress_ptr cinfo, long num_bytes) | |
| { | |
| my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src; | |
| // `dumb' implementation from jpeglib | |
| /* Just a dumb implementation for now. Could use fseek() except | |
| * it doesn't work on pipes. Not clear that being smart is worth | |
| * any trouble anyway --- large skips are infrequent. | |
| */ | |
| if (num_bytes > 0) { | |
| while (num_bytes > (long) src->bytes_in_buffer) { // Should not happen in case of memDevice | |
| num_bytes -= (long) src->bytes_in_buffer; | |
| (void) qt_fill_input_buffer(cinfo); | |
| /* note we assume that qt_fill_input_buffer will never return false, | |
| * so suspension need not be handled. | |
| */ | |
| } | |
| src->next_input_byte += (size_t) num_bytes; | |
| src->bytes_in_buffer -= (size_t) num_bytes; | |
| } | |
| } | |
| static void qt_term_source(j_decompress_ptr cinfo) | |
| { | |
| my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src; | |
| if (!src->device->isSequential()) | |
| src->device->seek(src->device->pos() - src->bytes_in_buffer); | |
| } | |
| #if defined(Q_C_CALLBACKS) | |
| } | |
| #endif | |
| inline my_jpeg_source_mgr::my_jpeg_source_mgr(QIODevice *device) | |
| { | |
| jpeg_source_mgr::init_source = qt_init_source; | |
| jpeg_source_mgr::fill_input_buffer = qt_fill_input_buffer; | |
| jpeg_source_mgr::skip_input_data = qt_skip_input_data; | |
| jpeg_source_mgr::resync_to_restart = jpeg_resync_to_restart; | |
| jpeg_source_mgr::term_source = qt_term_source; | |
| this->device = device; | |
| memDevice = qobject_cast<QBuffer *>(device); | |
| bytes_in_buffer = 0; | |
| next_input_byte = buffer; | |
| } | |
| inline static bool read_jpeg_size(int &w, int &h, j_decompress_ptr cinfo) | |
| { | |
| (void) jpeg_calc_output_dimensions(cinfo); | |
| w = cinfo->output_width; | |
| h = cinfo->output_height; | |
| return true; | |
| } | |
| #define HIGH_QUALITY_THRESHOLD 50 | |
| inline static bool read_jpeg_format(QImage::Format &format, j_decompress_ptr cinfo) | |
| { | |
| bool result = true; | |
| switch (cinfo->output_components) { | |
| case 1: | |
| format = QImage::Format_Indexed8; | |
| break; | |
| case 3: | |
| case 4: | |
| format = QImage::Format_RGB32; | |
| break; | |
| default: | |
| result = false; | |
| break; | |
| } | |
| cinfo->output_scanline = cinfo->output_height; | |
| return result; | |
| } | |
| static bool ensureValidImage(QImage *dest, struct jpeg_decompress_struct *info, | |
| const QSize& size) | |
| { | |
| QImage::Format format; | |
| switch (info->output_components) { | |
| case 1: | |
| format = QImage::Format_Indexed8; | |
| break; | |
| case 3: | |
| case 4: | |
| format = QImage::Format_RGB32; | |
| break; | |
| default: | |
| return false; // unsupported format | |
| } | |
| if (dest->size() != size || dest->format() != format) { | |
| *dest = QImage(size, format); | |
| if (format == QImage::Format_Indexed8) { | |
| dest->setColorCount(256); | |
| for (int i = 0; i < 256; i++) | |
| dest->setColor(i, qRgb(i,i,i)); | |
| } | |
| } | |
| return !dest->isNull(); | |
| } | |
| static bool read_jpeg_image(QImage *outImage, | |
| QSize scaledSize, QRect scaledClipRect, | |
| QRect clipRect, int inQuality, j_decompress_ptr info, struct my_error_mgr* err ) | |
| { | |
| if (!setjmp(err->setjmp_buffer)) { | |
| // -1 means default quality. | |
| int quality = inQuality; | |
| if (quality < 0) | |
| quality = 75; | |
| // If possible, merge the scaledClipRect into either scaledSize | |
| // or clipRect to avoid doing a separate scaled clipping pass. | |
| // Best results are achieved by clipping before scaling, not after. | |
| if (!scaledClipRect.isEmpty()) { | |
| if (scaledSize.isEmpty() && clipRect.isEmpty()) { | |
| // No clipping or scaling before final clip. | |
| clipRect = scaledClipRect; | |
| scaledClipRect = QRect(); | |
| } else if (scaledSize.isEmpty()) { | |
| // Clipping, but no scaling: combine the clip regions. | |
| scaledClipRect.translate(clipRect.topLeft()); | |
| clipRect = scaledClipRect.intersected(clipRect); | |
| scaledClipRect = QRect(); | |
| } else if (clipRect.isEmpty()) { | |
| // No clipping, but scaling: if we can map back to an | |
| // integer pixel boundary, then clip before scaling. | |
| if ((info->image_width % scaledSize.width()) == 0 && | |
| (info->image_height % scaledSize.height()) == 0) { | |
| int x = scaledClipRect.x() * info->image_width / | |
| scaledSize.width(); | |
| int y = scaledClipRect.y() * info->image_height / | |
| scaledSize.height(); | |
| int width = (scaledClipRect.right() + 1) * | |
| info->image_width / scaledSize.width() - x; | |
| int height = (scaledClipRect.bottom() + 1) * | |
| info->image_height / scaledSize.height() - y; | |
| clipRect = QRect(x, y, width, height); | |
| scaledSize = scaledClipRect.size(); | |
| scaledClipRect = QRect(); | |
| } | |
| } else { | |
| // Clipping and scaling: too difficult to figure out, | |
| // and not a likely use case, so do it the long way. | |
| } | |
| } | |
| // Determine the scale factor to pass to libjpeg for quick downscaling. | |
| if (!scaledSize.isEmpty()) { | |
| if (clipRect.isEmpty()) { | |
| info->scale_denom = | |
| qMin(info->image_width / scaledSize.width(), | |
| info->image_height / scaledSize.height()); | |
| } else { | |
| info->scale_denom = | |
| qMin(clipRect.width() / scaledSize.width(), | |
| clipRect.height() / scaledSize.height()); | |
| } | |
| if (info->scale_denom < 2) { | |
| info->scale_denom = 1; | |
| } else if (info->scale_denom < 4) { | |
| info->scale_denom = 2; | |
| } else if (info->scale_denom < 8) { | |
| info->scale_denom = 4; | |
| } else { | |
| info->scale_denom = 8; | |
| } | |
| info->scale_num = 1; | |
| if (!clipRect.isEmpty()) { | |
| // Correct the scale factor so that we clip accurately. | |
| // It is recommended that the clip rectangle be aligned | |
| // on an 8-pixel boundary for best performance. | |
| while (info->scale_denom > 1 && | |
| ((clipRect.x() % info->scale_denom) != 0 || | |
| (clipRect.y() % info->scale_denom) != 0 || | |
| (clipRect.width() % info->scale_denom) != 0 || | |
| (clipRect.height() % info->scale_denom) != 0)) { | |
| info->scale_denom /= 2; | |
| } | |
| } | |
| } | |
| // If high quality not required, use fast decompression | |
| if( quality < HIGH_QUALITY_THRESHOLD ) { | |
| info->dct_method = JDCT_IFAST; | |
| info->do_fancy_upsampling = FALSE; | |
| } | |
| (void) jpeg_calc_output_dimensions(info); | |
| // Determine the clip region to extract. | |
| QRect imageRect(0, 0, info->output_width, info->output_height); | |
| QRect clip; | |
| if (clipRect.isEmpty()) { | |
| clip = imageRect; | |
| } else if (info->scale_denom == info->scale_num) { | |
| clip = clipRect.intersected(imageRect); | |
| } else { | |
| // The scale factor was corrected above to ensure that | |
| // we don't miss pixels when we scale the clip rectangle. | |
| clip = QRect(clipRect.x() / int(info->scale_denom), | |
| clipRect.y() / int(info->scale_denom), | |
| clipRect.width() / int(info->scale_denom), | |
| clipRect.height() / int(info->scale_denom)); | |
| clip = clip.intersected(imageRect); | |
| } | |
| // Allocate memory for the clipped QImage. | |
| if (!ensureValidImage(outImage, info, clip.size())) | |
| longjmp(err->setjmp_buffer, 1); | |
| // Avoid memcpy() overhead if grayscale with no clipping. | |
| bool quickGray = (info->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 = (info->mem->alloc_sarray) | |
| ((j_common_ptr)info, JPOOL_IMAGE, | |
| info->output_width * info->output_components, 1); | |
| (void) jpeg_start_decompress(info); | |
| while (info->output_scanline < info->output_height) { | |
| int y = int(info->output_scanline) - clip.y(); | |
| if (y >= clip.height()) | |
| break; // We've read the entire clip region, so abort. | |
| (void) jpeg_read_scanlines(info, rows, 1); | |
| if (y < 0) | |
| continue; // Haven't reached the starting line yet. | |
| if (info->output_components == 3) { | |
| uchar *in = rows[0] + clip.x() * 3; | |
| QRgb *out = (QRgb*)outImage->scanLine(y); | |
| rgb888ToRgb32ConverterPtr(out, in, clip.width()); | |
| } else if (info->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 (info->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(info); | |
| while (info->output_scanline < info->output_height) { | |
| uchar *row = outImage->scanLine(info->output_scanline); | |
| (void) jpeg_read_scanlines(info, &row, 1); | |
| } | |
| } | |
| if (info->output_scanline == info->output_height) | |
| (void) jpeg_finish_decompress(info); | |
| if (info->density_unit == 1) { | |
| outImage->setDotsPerMeterX(int(100. * info->X_density / 2.54)); | |
| outImage->setDotsPerMeterY(int(100. * info->Y_density / 2.54)); | |
| } else if (info->density_unit == 2) { | |
| outImage->setDotsPerMeterX(int(100. * info->X_density)); | |
| outImage->setDotsPerMeterY(int(100. * info->Y_density)); | |
| } | |
| if (scaledSize.isValid() && scaledSize != clip.size()) { | |
| *outImage = outImage->scaled(scaledSize, Qt::IgnoreAspectRatio, quality >= HIGH_QUALITY_THRESHOLD ? Qt::SmoothTransformation : Qt::FastTransformation); | |
| } | |
| if (!scaledClipRect.isEmpty()) | |
| *outImage = outImage->copy(scaledClipRect); | |
| return !outImage->isNull(); | |
| } | |
| else | |
| return false; | |
| } | |
| struct my_jpeg_destination_mgr : public jpeg_destination_mgr { | |
| // Nothing dynamic - cannot rely on destruction over longjump | |
| QIODevice *device; | |
| JOCTET buffer[max_buf]; | |
| public: | |
| my_jpeg_destination_mgr(QIODevice *); | |
| }; | |
| #if defined(Q_C_CALLBACKS) | |
| extern "C" { | |
| #endif | |
| static void qt_init_destination(j_compress_ptr) | |
| { | |
| } | |
| static boolean qt_empty_output_buffer(j_compress_ptr cinfo) | |
| { | |
| my_jpeg_destination_mgr* dest = (my_jpeg_destination_mgr*)cinfo->dest; | |
| int written = dest->device->write((char*)dest->buffer, max_buf); | |
| if (written == -1) | |
| (*cinfo->err->error_exit)((j_common_ptr)cinfo); | |
| dest->next_output_byte = dest->buffer; | |
| dest->free_in_buffer = max_buf; | |
| #if defined(Q_OS_UNIXWARE) | |
| return B_TRUE; | |
| #else | |
| return true; | |
| #endif | |
| } | |
| static void qt_term_destination(j_compress_ptr cinfo) | |
| { | |
| my_jpeg_destination_mgr* dest = (my_jpeg_destination_mgr*)cinfo->dest; | |
| qint64 n = max_buf - dest->free_in_buffer; | |
| qint64 written = dest->device->write((char*)dest->buffer, n); | |
| if (written == -1) | |
| (*cinfo->err->error_exit)((j_common_ptr)cinfo); | |
| } | |
| #if defined(Q_C_CALLBACKS) | |
| } | |
| #endif | |
| inline my_jpeg_destination_mgr::my_jpeg_destination_mgr(QIODevice *device) | |
| { | |
| jpeg_destination_mgr::init_destination = qt_init_destination; | |
| jpeg_destination_mgr::empty_output_buffer = qt_empty_output_buffer; | |
| jpeg_destination_mgr::term_destination = qt_term_destination; | |
| this->device = device; | |
| next_output_byte = buffer; | |
| free_in_buffer = max_buf; | |
| } | |
| static bool write_jpeg_image(const QImage &image, QIODevice *device, int sourceQuality) | |
| { | |
| bool success = false; | |
| const QVector<QRgb> cmap = image.colorTable(); | |
| struct jpeg_compress_struct cinfo; | |
| JSAMPROW row_pointer[1]; | |
| row_pointer[0] = 0; | |
| struct my_jpeg_destination_mgr *iod_dest = new my_jpeg_destination_mgr(device); | |
| struct my_error_mgr jerr; | |
| cinfo.err = jpeg_std_error(&jerr); | |
| jerr.error_exit = my_error_exit; | |
| if (!setjmp(jerr.setjmp_buffer)) { | |
| // WARNING: | |
| // this if loop is inside a setjmp/longjmp branch | |
| // do not create C++ temporaries here because the destructor may never be called | |
| // if you allocate memory, make sure that you can free it (row_pointer[0]) | |
| jpeg_create_compress(&cinfo); | |
| cinfo.dest = iod_dest; | |
| cinfo.image_width = image.width(); | |
| cinfo.image_height = image.height(); | |
| bool gray=false; | |
| switch (image.format()) { | |
| case QImage::Format_Mono: | |
| case QImage::Format_MonoLSB: | |
| case QImage::Format_Indexed8: | |
| gray = true; | |
| for (int i = image.colorCount(); gray && i--;) { | |
| gray = gray & (qRed(cmap[i]) == qGreen(cmap[i]) && | |
| qRed(cmap[i]) == qBlue(cmap[i])); | |
| } | |
| cinfo.input_components = gray ? 1 : 3; | |
| cinfo.in_color_space = gray ? JCS_GRAYSCALE : JCS_RGB; | |
| break; | |
| default: | |
| cinfo.input_components = 3; | |
| cinfo.in_color_space = JCS_RGB; | |
| } | |
| jpeg_set_defaults(&cinfo); | |
| qreal diffInch = qAbs(image.dotsPerMeterX()*2.54/100. - qRound(image.dotsPerMeterX()*2.54/100.)) | |
| + qAbs(image.dotsPerMeterY()*2.54/100. - qRound(image.dotsPerMeterY()*2.54/100.)); | |
| qreal diffCm = (qAbs(image.dotsPerMeterX()/100. - qRound(image.dotsPerMeterX()/100.)) | |
| + qAbs(image.dotsPerMeterY()/100. - qRound(image.dotsPerMeterY()/100.)))*2.54; | |
| if (diffInch < diffCm) { | |
| cinfo.density_unit = 1; // dots/inch | |
| cinfo.X_density = qRound(image.dotsPerMeterX()*2.54/100.); | |
| cinfo.Y_density = qRound(image.dotsPerMeterY()*2.54/100.); | |
| } else { | |
| cinfo.density_unit = 2; // dots/cm | |
| cinfo.X_density = (image.dotsPerMeterX()+50) / 100; | |
| cinfo.Y_density = (image.dotsPerMeterY()+50) / 100; | |
| } | |
| int quality = sourceQuality >= 0 ? qMin(sourceQuality,100) : 75; | |
| #if defined(Q_OS_UNIXWARE) | |
| jpeg_set_quality(&cinfo, quality, B_TRUE /* limit to baseline-JPEG values */); | |
| jpeg_start_compress(&cinfo, B_TRUE); | |
| #else | |
| jpeg_set_quality(&cinfo, quality, true /* limit to baseline-JPEG values */); | |
| jpeg_start_compress(&cinfo, true); | |
| #endif | |
| row_pointer[0] = new uchar[cinfo.image_width*cinfo.input_components]; | |
| int w = cinfo.image_width; | |
| while (cinfo.next_scanline < cinfo.image_height) { | |
| uchar *row = row_pointer[0]; | |
| switch (image.format()) { | |
| case QImage::Format_Mono: | |
| case QImage::Format_MonoLSB: | |
| if (gray) { | |
| const uchar* data = image.constScanLine(cinfo.next_scanline); | |
| if (image.format() == QImage::Format_MonoLSB) { | |
| for (int i=0; i<w; i++) { | |
| bool bit = !!(*(data + (i >> 3)) & (1 << (i & 7))); | |
| row[i] = qRed(cmap[bit]); | |
| } | |
| } else { | |
| for (int i=0; i<w; i++) { | |
| bool bit = !!(*(data + (i >> 3)) & (1 << (7 -(i & 7)))); | |
| row[i] = qRed(cmap[bit]); | |
| } | |
| } | |
| } else { | |
| const uchar* data = image.constScanLine(cinfo.next_scanline); | |
| if (image.format() == QImage::Format_MonoLSB) { | |
| for (int i=0; i<w; i++) { | |
| bool bit = !!(*(data + (i >> 3)) & (1 << (i & 7))); | |
| *row++ = qRed(cmap[bit]); | |
| *row++ = qGreen(cmap[bit]); | |
| *row++ = qBlue(cmap[bit]); | |
| } | |
| } else { | |
| for (int i=0; i<w; i++) { | |
| bool bit = !!(*(data + (i >> 3)) & (1 << (7 -(i & 7)))); | |
| *row++ = qRed(cmap[bit]); | |
| *row++ = qGreen(cmap[bit]); | |
| *row++ = qBlue(cmap[bit]); | |
| } | |
| } | |
| } | |
| break; | |
| case QImage::Format_Indexed8: | |
| if (gray) { | |
| const uchar* pix = image.constScanLine(cinfo.next_scanline); | |
| for (int i=0; i<w; i++) { | |
| *row = qRed(cmap[*pix]); | |
| ++row; ++pix; | |
| } | |
| } else { | |
| const uchar* pix = image.constScanLine(cinfo.next_scanline); | |
| for (int i=0; i<w; i++) { | |
| *row++ = qRed(cmap[*pix]); | |
| *row++ = qGreen(cmap[*pix]); | |
| *row++ = qBlue(cmap[*pix]); | |
| ++pix; | |
| } | |
| } | |
| break; | |
| case QImage::Format_RGB888: | |
| memcpy(row, image.constScanLine(cinfo.next_scanline), w * 3); | |
| break; | |
| case QImage::Format_RGB32: | |
| case QImage::Format_ARGB32: | |
| case QImage::Format_ARGB32_Premultiplied: | |
| { | |
| const QRgb* rgb = (const QRgb*)image.constScanLine(cinfo.next_scanline); | |
| for (int i=0; i<w; i++) { | |
| *row++ = qRed(*rgb); | |
| *row++ = qGreen(*rgb); | |
| *row++ = qBlue(*rgb); | |
| ++rgb; | |
| } | |
| } | |
| break; | |
| default: | |
| { | |
| // (Testing shows that this way is actually faster than converting to RGB888 + memcpy) | |
| QImage rowImg = image.copy(0, cinfo.next_scanline, w, 1).convertToFormat(QImage::Format_RGB32); | |
| const QRgb* rgb = (const QRgb*)rowImg.constScanLine(0); | |
| for (int i=0; i<w; i++) { | |
| *row++ = qRed(*rgb); | |
| *row++ = qGreen(*rgb); | |
| *row++ = qBlue(*rgb); | |
| ++rgb; | |
| } | |
| } | |
| break; | |
| } | |
| jpeg_write_scanlines(&cinfo, row_pointer, 1); | |
| } | |
| jpeg_finish_compress(&cinfo); | |
| jpeg_destroy_compress(&cinfo); | |
| success = true; | |
| } else { | |
| jpeg_destroy_compress(&cinfo); | |
| success = false; | |
| } | |
| delete iod_dest; | |
| delete [] row_pointer[0]; | |
| return success; | |
| } | |
| class QJpegHandlerPrivate | |
| { | |
| public: | |
| enum State { | |
| Ready, | |
| ReadHeader, | |
| Error | |
| }; | |
| QJpegHandlerPrivate(QJpegHandler *qq) | |
| : quality(75), iod_src(0), state(Ready), q(qq) | |
| {} | |
| ~QJpegHandlerPrivate() | |
| { | |
| if(iod_src) | |
| { | |
| jpeg_destroy_decompress(&info); | |
| delete iod_src; | |
| iod_src = 0; | |
| } | |
| } | |
| bool readJpegHeader(QIODevice*); | |
| bool read(QImage *image); | |
| int quality; | |
| QVariant size; | |
| QImage::Format format; | |
| QSize scaledSize; | |
| QRect scaledClipRect; | |
| QRect clipRect; | |
| struct jpeg_decompress_struct info; | |
| struct my_jpeg_source_mgr * iod_src; | |
| struct my_error_mgr err; | |
| State state; | |
| QJpegHandler *q; | |
| }; | |
| /*! | |
| \internal | |
| */ | |
| bool QJpegHandlerPrivate::readJpegHeader(QIODevice *device) | |
| { | |
| if(state == Ready) | |
| { | |
| state = Error; | |
| iod_src = new my_jpeg_source_mgr(device); | |
| jpeg_create_decompress(&info); | |
| info.src = iod_src; | |
| info.err = jpeg_std_error(&err); | |
| err.error_exit = my_error_exit; | |
| if (!setjmp(err.setjmp_buffer)) { | |
| #if defined(Q_OS_UNIXWARE) | |
| (void) jpeg_read_header(&info, B_TRUE); | |
| #else | |
| (void) jpeg_read_header(&info, true); | |
| #endif | |
| int width = 0; | |
| int height = 0; | |
| read_jpeg_size(width, height, &info); | |
| size = QSize(width, height); | |
| format = QImage::Format_Invalid; | |
| read_jpeg_format(format, &info); | |
| state = ReadHeader; | |
| return true; | |
| } | |
| else | |
| { | |
| return false; | |
| } | |
| } | |
| else if(state == Error) | |
| return false; | |
| return true; | |
| } | |
| bool QJpegHandlerPrivate::read(QImage *image) | |
| { | |
| if(state == Ready) | |
| readJpegHeader(q->device()); | |
| if(state == ReadHeader) | |
| { | |
| bool success = read_jpeg_image(image, scaledSize, scaledClipRect, clipRect, quality, &info, &err); | |
| state = success ? Ready : Error; | |
| return success; | |
| } | |
| return false; | |
| } | |
| QJpegHandler::QJpegHandler() | |
| : d(new QJpegHandlerPrivate(this)) | |
| { | |
| const uint features = qDetectCPUFeatures(); | |
| Q_UNUSED(features); | |
| #if defined(QT_HAVE_NEON) | |
| // from qimage_neon.cpp | |
| Q_GUI_EXPORT void QT_FASTCALL qt_convert_rgb888_to_rgb32_neon(quint32 *dst, const uchar *src, int len); | |
| if (features & NEON) | |
| rgb888ToRgb32ConverterPtr = qt_convert_rgb888_to_rgb32_neon; | |
| #endif // QT_HAVE_NEON | |
| #if defined(QT_HAVE_SSSE3) | |
| // from qimage_ssse3.cpp | |
| Q_GUI_EXPORT void QT_FASTCALL qt_convert_rgb888_to_rgb32_ssse3(quint32 *dst, const uchar *src, int len); | |
| if (features & SSSE3) | |
| rgb888ToRgb32ConverterPtr = qt_convert_rgb888_to_rgb32_ssse3; | |
| #endif // QT_HAVE_SSSE3 | |
| } | |
| QJpegHandler::~QJpegHandler() | |
| { | |
| delete d; | |
| } | |
| bool QJpegHandler::canRead() const | |
| { | |
| if(d->state == QJpegHandlerPrivate::Ready && !canRead(device())) | |
| return false; | |
| if (d->state != QJpegHandlerPrivate::Error) { | |
| setFormat("jpeg"); | |
| return true; | |
| } | |
| return false; | |
| } | |
| bool QJpegHandler::canRead(QIODevice *device) | |
| { | |
| if (!device) { | |
| qWarning("QJpegHandler::canRead() called with no device"); | |
| return false; | |
| } | |
| char buffer[2]; | |
| if (device->peek(buffer, 2) != 2) | |
| return false; | |
| return uchar(buffer[0]) == 0xff && uchar(buffer[1]) == 0xd8; | |
| } | |
| bool QJpegHandler::read(QImage *image) | |
| { | |
| if (!canRead()) | |
| return false; | |
| return d->read(image); | |
| } | |
| bool QJpegHandler::write(const QImage &image) | |
| { | |
| return write_jpeg_image(image, device(), d->quality); | |
| } | |
| bool QJpegHandler::supportsOption(ImageOption option) const | |
| { | |
| return option == Quality | |
| || option == ScaledSize | |
| || option == ScaledClipRect | |
| || option == ClipRect | |
| || option == Size | |
| || option == ImageFormat; | |
| } | |
| QVariant QJpegHandler::option(ImageOption option) const | |
| { | |
| switch(option) { | |
| case Quality: | |
| return d->quality; | |
| case ScaledSize: | |
| return d->scaledSize; | |
| case ScaledClipRect: | |
| return d->scaledClipRect; | |
| case ClipRect: | |
| return d->clipRect; | |
| case Size: | |
| d->readJpegHeader(device()); | |
| return d->size; | |
| case ImageFormat: | |
| d->readJpegHeader(device()); | |
| return d->format; | |
| default: | |
| return QVariant(); | |
| } | |
| } | |
| void QJpegHandler::setOption(ImageOption option, const QVariant &value) | |
| { | |
| switch(option) { | |
| case Quality: | |
| d->quality = value.toInt(); | |
| break; | |
| case ScaledSize: | |
| d->scaledSize = value.toSize(); | |
| break; | |
| case ScaledClipRect: | |
| d->scaledClipRect = value.toRect(); | |
| break; | |
| case ClipRect: | |
| d->clipRect = value.toRect(); | |
| break; | |
| default: | |
| break; | |
| } | |
| } | |
| QByteArray QJpegHandler::name() const | |
| { | |
| return "jpeg"; | |
| } | |
| QT_END_NAMESPACE |