diff options
| -rw-r--r-- | src/gui/image/qimage.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index 08eb759ec2..176cdfe09f 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -4134,9 +4134,6 @@ QImage QImage::alphaChannel() const if (!d) return QImage(); - if (d->format == QImage::Format_Alpha8) - return *this; - int w = d->width; int h = d->height; @@ -4166,6 +4163,10 @@ 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); |