Re: GdkPixbuf API proposial

[Oleg Klimov <quif land ru>]

> New features:
> <..>
>   - GdkPixbufClippingRegion object (2 structs, 13 function calls)
>   - now possible to draw lines, polygons etc 


Code example:

void draw_textured_line(
   GdkPixbuf* dest,
   gdouble x1, gdouble y1, gdouble x2, gdouble y2,
   gdouble thickness,
   GdkPixbuf* texture, gdouble texture_angle)
{
   gint bound_x, bound_y, bound_width, bound_height;
   GdkPixbuf* region = gdk_pixbuf_clip_region_new(0, 0, dest->width, 
dest->height);
   gdk_pixbuf_clip_region_line(region, x1, y1, x2, y2, thickness);
   gdk_pixbuf_clip_region_circle(region, x1, y1, thickness);
   gdk_pixbuf_clip_region_circle(region, x2, y2, thickness);
   gdk_pixbuf_clip_region_get_bounds(region,
       &bound_x, &bound_y, &bound_width, &bound_height);

   GdkPixbuf* tmp;
   tmp = gdk_pixbuf_new(..., bound_width, bound_height);

   GdkPixbufTransform* trans;
   trans = gdk_pixbuf_affine_new();
   gdk_pixbuf_affine_rotate(GDK_PIXBUF_AFFINE(trans), texture_angle);
   gdk_pixbuf_transform_set_edge_mode(trans, GDK_PIXBUF_EDGE_TILE);
   gdk_pixbuf_transform_render(trans, tmp, texture);

   gdk_pixbuf_copy_region(dest, region, tmp, bound_x, bound_y);

   g_object_unref( <all used objects> );
}


(sorry for some typos...:)