diff options
Diffstat (limited to 'gdk/gdkgc.c')
| -rw-r--r-- | gdk/gdkgc.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gdk/gdkgc.c b/gdk/gdkgc.c index f87b7b37c..127a692b1 100644 --- a/gdk/gdkgc.c +++ b/gdk/gdkgc.c @@ -367,6 +367,39 @@ gdk_gc_set_dashes (GdkGC *gc, } /** + * gdk_gc_offset: + * @gc: a #GdkGC + * @x_offset: amount by which to offset the GC in the X direction + * @y_offset: amount by which to offset the GC in the Y direction + * + * Offset attributes such as the clip and tile-stipple origins + * of the GC so that drawing at x - x_offset, y - y_offset with + * the offset GC has the same effect as drawing at x, y with the original + * GC. + **/ +void +gdk_gc_offset (GdkGC *gc, + gint x_offset, + gint y_offset) +{ + if (x_offset != 0 || y_offset != 0) + { + GdkGCValues values; + + values.clip_x_origin = gc->clip_x_origin - x_offset; + values.clip_y_origin = gc->clip_y_origin - y_offset; + values.ts_x_origin = gc->ts_x_origin - x_offset; + values.ts_y_origin = gc->ts_y_origin - y_offset; + + gdk_gc_set_values (gc, &values, + GDK_GC_CLIP_X_ORIGIN | + GDK_GC_CLIP_Y_ORIGIN | + GDK_GC_TS_X_ORIGIN | + GDK_GC_TS_Y_ORIGIN); + } +} + +/** * gdk_gc_set_colormap: * @gc: a #GdkGC * @colormap: a #GdkColormap |