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Diffstat (limited to 'src/gui/image/qpnghandler.cpp')
| -rw-r--r-- | src/gui/image/qpnghandler.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
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) |