diff options
Diffstat (limited to 'src/gui')
| -rw-r--r-- | src/gui/image/qimagereader.cpp | 42 | ||||
| -rw-r--r-- | src/gui/image/qpnghandler.cpp | 5 |
2 files changed, 28 insertions, 19 deletions
diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp index 074f3eb..7580446 100644 --- a/src/gui/image/qimagereader.cpp +++ b/src/gui/image/qimagereader.cpp @@ -471,7 +471,6 @@ QImageReaderPrivate::QImageReaderPrivate(QImageReader *qq) handler = 0; quality = -1; imageReaderError = QImageReader::UnknownError; - errorString = QLatin1String(QT_TRANSLATE_NOOP(QImageReader, "Unknown error")); q = qq; } @@ -1214,11 +1213,12 @@ bool QImageReader::jumpToImage(int imageNumber) } /*! - For image formats that support animation, this function returns - the number of times the animation should loop. Otherwise, it - returns -1. + For image formats that support animation, this function returns the number + of times the animation should loop. If this function returns -1, it can + either mean the animation should loop forever, or that an error occurred. + If an error occurred, canRead() will return false. - \sa supportsAnimation(), QImageIOHandler::loopCount() + \sa supportsAnimation(), QImageIOHandler::loopCount(), canRead() */ int QImageReader::loopCount() const { @@ -1228,13 +1228,13 @@ int QImageReader::loopCount() const } /*! - For image formats that support animation, this function returns - the total number of images in the animation. + For image formats that support animation, this function returns the total + number of images in the animation. If the format does not support + animation, 0 is returned. - Certain animation formats do not support this feature, in which - case 0 is returned. + This function returns -1 if an error occurred. - \sa supportsAnimation(), QImageIOHandler::imageCount() + \sa supportsAnimation(), QImageIOHandler::imageCount(), canRead() */ int QImageReader::imageCount() const { @@ -1244,11 +1244,13 @@ int QImageReader::imageCount() const } /*! - For image formats that support animation, this function returns - the number of milliseconds to wait until displaying the next frame - in the animation. Otherwise, 0 is returned. + For image formats that support animation, this function returns the number + of milliseconds to wait until displaying the next frame in the animation. + If the image format doesn't support animation, 0 is returned. + + This function returns -1 if an error occurred. - \sa supportsAnimation(), QImageIOHandler::nextImageDelay() + \sa supportsAnimation(), QImageIOHandler::nextImageDelay(), canRead() */ int QImageReader::nextImageDelay() const { @@ -1258,11 +1260,13 @@ int QImageReader::nextImageDelay() const } /*! - For image formats that support animation, this function returns - the sequence number of the current frame. Otherwise, -1 is - returned. + For image formats that support animation, this function returns the + sequence number of the current frame. If the image format doesn't support + animation, 0 is returned. + + This function returns -1 if an error occurred. - \sa supportsAnimation(), QImageIOHandler::currentImageNumber() + \sa supportsAnimation(), QImageIOHandler::currentImageNumber(), canRead() */ int QImageReader::currentImageNumber() const { @@ -1302,6 +1306,8 @@ QImageReader::ImageReaderError QImageReader::error() const */ QString QImageReader::errorString() const { + if (d->errorString.isEmpty()) + return QLatin1String(QT_TRANSLATE_NOOP(QImageReader, "Unknown error")); return d->errorString; } diff --git a/src/gui/image/qpnghandler.cpp b/src/gui/image/qpnghandler.cpp index 14c863b..1de0f32 100644 --- a/src/gui/image/qpnghandler.cpp +++ b/src/gui/image/qpnghandler.cpp @@ -67,6 +67,9 @@ QT_BEGIN_NAMESPACE # define Q_INTERNAL_WIN_NO_THROW #endif +// avoid going through QImage::scanLine() which calls detach +#define FAST_SCAN_LINE(data, bpl, y) (data + (y) * bpl) + /* All PNG files load to the minimal QImage equivalent. @@ -510,7 +513,7 @@ bool Q_INTERNAL_WIN_NO_THROW QPngHandlerPrivate::readPngImage(QImage *outImage) && outImage->format() == QImage::Format_Indexed8) { int color_table_size = outImage->colorCount(); for (int y=0; y<(int)height; ++y) { - uchar *p = outImage->scanLine(y); + uchar *p = FAST_SCAN_LINE(data, bpl, y); uchar *end = p + width; while (p < end) { if (*p >= color_table_size) |