+/* Compute masks and transform image IMG on frame F, as specified
+ by the image's specification, */
+
+static void
+postprocess_image (f, img)
+ struct frame *f;
+ struct image *img;
+{
+ /* Manipulation of the image's mask. */
+ if (img->pixmap)
+ {
+ Lisp_Object conversion, spec;
+ Lisp_Object mask;
+
+ spec = img->spec;
+
+ /* `:heuristic-mask t'
+ `:mask heuristic'
+ means build a mask heuristically.
+ `:heuristic-mask (R G B)'
+ `:mask (heuristic (R G B))'
+ means build a mask from color (R G B) in the
+ image.
+ `:mask nil'
+ means remove a mask, if any. */
+
+ mask = image_spec_value (spec, QCheuristic_mask, NULL);
+ if (!NILP (mask))
+ x_build_heuristic_mask (f, img, mask);
+ else
+ {
+ int found_p;
+
+ mask = image_spec_value (spec, QCmask, &found_p);
+
+ if (EQ (mask, Qheuristic))
+ x_build_heuristic_mask (f, img, Qt);
+ else if (CONSP (mask)
+ && EQ (XCAR (mask), Qheuristic))
+ {
+ if (CONSP (XCDR (mask)))
+ x_build_heuristic_mask (f, img, XCAR (XCDR (mask)));
+ else
+ x_build_heuristic_mask (f, img, XCDR (mask));
+ }
+ else if (NILP (mask) && found_p && img->mask)
+ {
+ XFreePixmap (FRAME_X_DISPLAY (f), img->mask);
+ img->mask = None;
+ }
+ }
+
+
+ /* Should we apply an image transformation algorithm? */
+ conversion = image_spec_value (spec, QCconversion, NULL);
+ if (EQ (conversion, Qdisabled))
+ x_disable_image (f, img);
+ else if (EQ (conversion, Qlaplace))
+ x_laplace (f, img);
+ else if (EQ (conversion, Qemboss))
+ x_emboss (f, img);
+ else if (CONSP (conversion)
+ && EQ (XCAR (conversion), Qedge_detection))
+ {
+ Lisp_Object tem;
+ tem = XCDR (conversion);
+ if (CONSP (tem))
+ x_edge_detection (f, img,
+ Fplist_get (tem, QCmatrix),
+ Fplist_get (tem, QCcolor_adjustment));
+ }
+ }
+}
+
+