--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/image/qxbmhandler.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,350 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 <qplatformdefs.h>
+#include "private/qxbmhandler_p.h"
+
+#ifndef QT_NO_IMAGEFORMAT_XBM
+
+#include <qimage.h>
+#include <qiodevice.h>
+#include <qvariant.h>
+
+#include <stdio.h>
+#include <ctype.h>
+
+QT_BEGIN_NAMESPACE
+
+/*****************************************************************************
+ X bitmap image read/write functions
+ *****************************************************************************/
+
+static inline int hex2byte(register char *p)
+{
+ return ((isdigit((uchar) *p) ? *p - '0' : toupper((uchar) *p) - 'A' + 10) << 4) |
+ (isdigit((uchar) *(p+1)) ? *(p+1) - '0' : toupper((uchar) *(p+1)) - 'A' + 10);
+}
+
+static bool read_xbm_header(QIODevice *device, int& w, int& h)
+{
+ const int buflen = 300;
+ char buf[buflen + 1];
+ QRegExp r1(QLatin1String("^#define[ \t]+[a-zA-Z0-9._]+[ \t]+"));
+ QRegExp r2(QLatin1String("[0-9]+"));
+
+ qint64 readBytes = 0;
+
+ // "#define .._width <num>"
+ readBytes = device->readLine(buf, buflen);
+ if (readBytes <= 0)
+ return false;
+ buf[readBytes - 1] = '\0';
+
+ // skip initial comment, if any
+ while (buf[0] != '#' && (readBytes = device->readLine( buf, buflen )) > 0) {}
+
+ if (readBytes <= 0)
+ return false;
+ buf[readBytes - 1] = '\0';
+ QString sbuf;
+ sbuf = QString::fromLatin1(buf);
+
+ if (r1.indexIn(sbuf) == 0 &&
+ r2.indexIn(sbuf, r1.matchedLength()) == r1.matchedLength())
+ w = QByteArray(&buf[r1.matchedLength()]).trimmed().toInt();
+
+ // "#define .._height <num>"
+ readBytes = device->readLine(buf, buflen);
+ if (readBytes <= 0)
+ return false;
+ buf[readBytes - 1] = '\0';
+
+ sbuf = QString::fromLatin1(buf);
+
+ if (r1.indexIn(sbuf) == 0 &&
+ r2.indexIn(sbuf, r1.matchedLength()) == r1.matchedLength())
+ h = QByteArray(&buf[r1.matchedLength()]).trimmed().toInt();
+
+ // format error
+ if (w <= 0 || w > 32767 || h <= 0 || h > 32767)
+ return false;
+
+ return true;
+}
+
+static bool read_xbm_body(QIODevice *device, int w, int h, QImage *outImage)
+{
+ const int buflen = 300;
+ char buf[buflen + 1];
+
+ qint64 readBytes = 0;
+
+ // scan for database
+ for (;;) {
+ if ((readBytes = device->readLine(buf, buflen)) <= 0) {
+ // end of file
+ return false;
+ }
+
+ buf[readBytes] = '\0';
+ if (QByteArray::fromRawData(buf, readBytes).contains("0x"))
+ break;
+ }
+
+ if (outImage->size() != QSize(w, h) || outImage->format() != QImage::Format_MonoLSB) {
+ *outImage = QImage(w, h, QImage::Format_MonoLSB);
+ if (outImage->isNull())
+ return false;
+ }
+
+ outImage->setNumColors(2);
+ outImage->setColor(0, qRgb(255,255,255)); // white
+ outImage->setColor(1, qRgb(0,0,0)); // black
+
+ int x = 0, y = 0;
+ uchar *b = outImage->scanLine(0);
+ char *p = buf + QByteArray::fromRawData(buf, readBytes).indexOf("0x");
+ w = (w+7)/8; // byte width
+
+ while (y < h) { // for all encoded bytes...
+ if (p) { // p = "0x.."
+ *b++ = hex2byte(p+2);
+ p += 2;
+ if (++x == w && ++y < h) {
+ b = outImage->scanLine(y);
+ x = 0;
+ }
+ p = strstr(p, "0x");
+ } else { // read another line
+ if ((readBytes = device->readLine(buf,buflen)) <= 0) // EOF ==> truncated image
+ break;
+ p = buf + QByteArray::fromRawData(buf, readBytes).indexOf("0x");
+ }
+ }
+
+ return true;
+}
+
+static bool read_xbm_image(QIODevice *device, QImage *outImage)
+{
+ int w = 0, h = 0;
+ if (!read_xbm_header(device, w, h))
+ return false;
+ return read_xbm_body(device, w, h, outImage);
+}
+
+static bool write_xbm_image(const QImage &sourceImage, QIODevice *device, const QString &fileName)
+{
+ QImage image = sourceImage;
+ int w = image.width();
+ int h = image.height();
+ int i;
+ QString s = fileName; // get file base name
+ int msize = s.length() + 100;
+ char *buf = new char[msize];
+
+ qsnprintf(buf, msize, "#define %s_width %d\n", s.toAscii().data(), w);
+ device->write(buf, qstrlen(buf));
+ qsnprintf(buf, msize, "#define %s_height %d\n", s.toAscii().data(), h);
+ device->write(buf, qstrlen(buf));
+ qsnprintf(buf, msize, "static char %s_bits[] = {\n ", s.toAscii().data());
+ device->write(buf, qstrlen(buf));
+
+ if (image.format() != QImage::Format_MonoLSB)
+ image = image.convertToFormat(QImage::Format_MonoLSB);
+
+ bool invert = qGray(image.color(0)) < qGray(image.color(1));
+ char hexrep[16];
+ for (i=0; i<10; i++)
+ hexrep[i] = '0' + i;
+ for (i=10; i<16; i++)
+ hexrep[i] = 'a' -10 + i;
+ if (invert) {
+ char t;
+ for (i=0; i<8; i++) {
+ t = hexrep[15-i];
+ hexrep[15-i] = hexrep[i];
+ hexrep[i] = t;
+ }
+ }
+ int bcnt = 0;
+ register char *p = buf;
+ int bpl = (w+7)/8;
+ for (int y = 0; y < h; ++y) {
+ uchar *b = image.scanLine(y);
+ for (i = 0; i < bpl; ++i) {
+ *p++ = '0'; *p++ = 'x';
+ *p++ = hexrep[*b >> 4];
+ *p++ = hexrep[*b++ & 0xf];
+
+ if (i < bpl - 1 || y < h - 1) {
+ *p++ = ',';
+ if (++bcnt > 14) {
+ *p++ = '\n';
+ *p++ = ' ';
+ *p = '\0';
+ if ((int)qstrlen(buf) != device->write(buf, qstrlen(buf))) {
+ delete [] buf;
+ return false;
+ }
+ p = buf;
+ bcnt = 0;
+ }
+ }
+ }
+ }
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+ strcpy_s(p, sizeof(" };\n"), " };\n");
+#else
+ strcpy(p, " };\n");
+#endif
+ if ((int)qstrlen(buf) != device->write(buf, qstrlen(buf))) {
+ delete [] buf;
+ return false;
+ }
+
+ delete [] buf;
+ return true;
+}
+
+QXbmHandler::QXbmHandler()
+ : state(Ready)
+{
+}
+
+bool QXbmHandler::readHeader()
+{
+ state = Error;
+ if (!read_xbm_header(device(), width, height))
+ return false;
+ state = ReadHeader;
+ return true;
+}
+
+bool QXbmHandler::canRead() const
+{
+ if (state == Ready) {
+ if (!canRead(device()))
+ return false;
+ setFormat("xbm");
+ return true;
+ }
+ return state != Error;
+}
+
+bool QXbmHandler::canRead(QIODevice *device)
+{
+ QImage image;
+
+ // it's impossible to tell whether we can load an XBM or not when
+ // it's from a sequential device, as the only way to do it is to
+ // attempt to parse the whole image.
+ if (device->isSequential())
+ return false;
+
+ qint64 oldPos = device->pos();
+ bool success = read_xbm_image(device, &image);
+ device->seek(oldPos);
+
+ return success;
+}
+
+bool QXbmHandler::read(QImage *image)
+{
+ if (state == Error)
+ return false;
+
+ if (state == Ready && !readHeader()) {
+ state = Error;
+ return false;
+ }
+
+ if (!read_xbm_body(device(), width, height, image)) {
+ state = Error;
+ return false;
+ }
+
+ state = Ready;
+ return true;
+}
+
+bool QXbmHandler::write(const QImage &image)
+{
+ return write_xbm_image(image, device(), fileName);
+}
+
+bool QXbmHandler::supportsOption(ImageOption option) const
+{
+ return option == Name
+ || option == Size
+ || option == ImageFormat;
+}
+
+QVariant QXbmHandler::option(ImageOption option) const
+{
+ if (option == Name) {
+ return fileName;
+ } else if (option == Size) {
+ if (state == Error)
+ return QVariant();
+ if (state == Ready && !const_cast<QXbmHandler*>(this)->readHeader())
+ return QVariant();
+ return QSize(width, height);
+ } else if (option == ImageFormat) {
+ return QImage::Format_MonoLSB;
+ }
+ return QVariant();
+}
+
+void QXbmHandler::setOption(ImageOption option, const QVariant &value)
+{
+ if (option == Name)
+ fileName = value.toString();
+}
+
+QByteArray QXbmHandler::name() const
+{
+ return "xbm";
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_IMAGEFORMAT_XBM