diff options
Diffstat (limited to 'plugingui/pixelbuffer.cc')
| -rw-r--r-- | plugingui/pixelbuffer.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/plugingui/pixelbuffer.cc b/plugingui/pixelbuffer.cc index e9e376a..c0dc2cc 100644 --- a/plugingui/pixelbuffer.cc +++ b/plugingui/pixelbuffer.cc @@ -114,7 +114,11 @@ void GUI::PixelBufferAlpha::addPixel(size_t x, size_t y, buf[PX(2)] = (unsigned char)(blue * a + buf[PX(2)] * (1-a)); //buf[PX(3)] = (unsigned char)(alpha * a + buf[PX(3)] * (1-a)); - buf[PX(3)] = alpha>buf[PX(3)]?alpha:buf[PX(3)]; + //buf[PX(3)] = alpha>buf[PX(3)]?alpha:buf[PX(3)]; + + float a1 = (float)buf[PX(3)] / 255.0; + float a2 = (float)alpha / 255.0; + buf[PX(3)] = (a1 + ((1 - a1) * a2)) * 255.0; } void GUI::PixelBufferAlpha::pixel(size_t x, size_t y, |