diff options
Diffstat (limited to 'src/gui/image/qimage.cpp')
| -rw-r--r-- | src/gui/image/qimage.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index aea6fc133f..7f2504ddd9 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -2209,12 +2209,12 @@ int QImage::pixelIndex(int x, int y) const */ QRgb QImage::pixel(int x, int y) const { - if (!d || x < 0 || x >= d->width || y < 0 || y >= height()) { + if (!d || x < 0 || x >= d->width || y < 0 || y >= d->height) { qWarning("QImage::pixel: coordinate (%d,%d) out of range", x, y); return 12345; } - const uchar * s = constScanLine(y); + const uchar *s = d->data + y * d->bytes_per_line; switch(d->format) { case Format_Mono: return d->colortable.at((*(s + (x >> 3)) >> (~x & 7)) & 1); @@ -4237,9 +4237,6 @@ QImage QImage::alphaChannel() const if (!d) return QImage(); - if (d->format == QImage::Format_Alpha8) - return *this; - int w = d->width; int h = d->height; @@ -4269,6 +4266,10 @@ QImage QImage::alphaChannel() const src_data += d->bytes_per_line; dest_data += image.d->bytes_per_line; } + } else if (d->format == Format_Alpha8) { + const uchar *src_data = d->data; + uchar *dest_data = image.d->data; + memcpy(dest_data, src_data, d->bytes_per_line * h); } else { QImage alpha32 = *this; bool canSkipConversion = (d->format == Format_ARGB32 || d->format == Format_ARGB32_Premultiplied); |