diff options
Diffstat (limited to 'applets/notification_area/status-notifier/sn-item-v0.c')
| -rw-r--r-- | applets/notification_area/status-notifier/sn-item-v0.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/applets/notification_area/status-notifier/sn-item-v0.c b/applets/notification_area/status-notifier/sn-item-v0.c index 0ef0570a..0ab07ce4 100644 --- a/applets/notification_area/status-notifier/sn-item-v0.c +++ b/applets/notification_area/status-notifier/sn-item-v0.c @@ -344,6 +344,9 @@ surface_from_variant (GVariant *variant, cairo_format_t format; gint stride; guint32 *data; + gint x; + gint y; + guchar *p; format = CAIRO_FORMAT_ARGB32; stride = cairo_format_stride_for_width (format, width); @@ -358,6 +361,22 @@ surface_from_variant (GVariant *variant, } #endif + p = (guchar *) data; + /* premultiply alpha for Cairo */ + for (y = 0; y < height; y++) + { + for (x = 0; x < width; x++) + { + guchar alpha = p[x * 4 + 3]; + + p[x * 4 + 0] = (p[x * 4 + 0] * alpha) / 255; + p[x * 4 + 1] = (p[x * 4 + 1] * alpha) / 255; + p[x * 4 + 2] = (p[x * 4 + 2] * alpha) / 255; + } + + p += stride; + } + return cairo_image_surface_create_for_data ((guchar *) data, format, width, height, stride); } |