[cairo] [PATCH 23/39] [OpenVG] implemented cairo_mask

[tardyp at gmail.com]

From: Øyvind Kolås <pippin at gimp.org>

---
 src/cairo-openvg-surface.c |   34 +++++++++++++++++++++++++++++++++-
 1 files changed, 33 insertions(+), 1 deletions(-)

diff --git a/src/cairo-openvg-surface.c b/src/cairo-openvg-surface.c
index f33d834..d2d0502 100644
--- a/src/cairo-openvg-surface.c
+++ b/src/cairo-openvg-surface.c
@@ -758,7 +758,39 @@ _cairo_openvg_surface_mask (void             *asurface,
                             cairo_pattern_t  *mask)
 {
   cairo_status_t status = CAIRO_STATUS_SUCCESS;
-  printf ("mask\n");
+#ifdef ENABLE_MASK
+  cairo_openvg_surface_t *vgsurface = asurface;
+  cairo_surface_t        *image;
+  cairo_t                *cr;
+
+  image = cairo_image_surface_create (CAIRO_FORMAT_A8, vgsurface->width,
+                                                       vgsurface->height);
+  cr = cairo_create (image);
+
+  cairo_save (cr);
+  cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+  cairo_translate (cr, 0.0, vgsurface->height);
+  cairo_scale (cr, 1.0, -1.0);
+
+  cairo_set_source (cr, mask);
+  cairo_paint (cr);
+  cairo_restore (cr);
+  cairo_restore (cr);
+
+    {
+      VGImage vgimage;
+      unsigned char *data = cairo_image_surface_get_data (image);
+      vgSeti (VG_MASKING, VG_TRUE);
+      vgimage  = vgCreateImage (VG_A_8, vgsurface->width, vgsurface->height, VG_IMAGE_QUALITY_FASTER);
+      vgImageSubData (vgimage, data, vgsurface->width, VG_A_8, 0, 0, vgsurface->width, vgsurface->height);
+      vgMask (vgimage, VG_INTERSECT_MASK, 0, 0, vgsurface->width, vgsurface->height);
+      vgDestroyImage (vgimage);
+    }
+
+  cairo_destroy (cr);
+  
+  cairo_surface_destroy (image);
+#endif
 
   /* upload source as image */
   status = _cairo_openvg_surface_paint (asurface, op, source);
-- 
1.6.0.4