[cairo] [PATCH 10/39] [OpenVG] Added preliminary code to support image pattern source.

[tardyp at gmail.com]

From: Øyvind Kolås <pippin at gimp.org>

---
 src/cairo-openvg-surface.c |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/src/cairo-openvg-surface.c b/src/cairo-openvg-surface.c
index 54ad794..364e855 100644
--- a/src/cairo-openvg-surface.c
+++ b/src/cairo-openvg-surface.c
@@ -45,6 +45,7 @@ typedef struct cairo_openvg_surface {
     int             height;
 
     VGPaint         source_paint;
+    VGImage         source_image;
 } cairo_openvg_surface_t;
 
 static cairo_surface_t *
@@ -111,6 +112,7 @@ _cairo_openvg_surface_paint (void *asurface,
     else
       {
         printf ("not supporting source of type %i for paint yet\n", source->type);
+        return CAIRO_INT_STATUS_UNSUPPORTED;
       }
 
 
@@ -439,6 +441,26 @@ _cairo_openvg_setup_surface_source (cairo_openvg_surface_t  *vgsurface,
   VGfloat color[] = {0.7, 0.5, 0.3, 0.5};
   vgSetParameterfv (vgsurface->source_paint, VG_PAINT_COLOR, 4, color);
   printf ("not handling source of type surface\n");
+
+  vgsurface->source_image = vgCreateImage (VG_sRGBA_8888, 128, 128, VG_IMAGE_QUALITY_BETTER);
+
+  {
+    unsigned char *data = malloc (128*128*4);
+    int i;
+    for (i=0;i<128*128*4;i++)
+      {
+        data[i] = rand() % 255;
+        if (0 && i%4 == 3)
+          data[i] = 255;
+      }
+
+    vgImageSubData (vgsurface->source_image, data, 128*4, VG_sRGBA_8888, 0,
+     0, 128, 128);
+
+    free (data);
+  }
+  
+
   return CAIRO_STATUS_SUCCESS;
   return CAIRO_INT_STATUS_UNSUPPORTED;
 }
@@ -489,6 +511,12 @@ teardown_source (cairo_openvg_surface_t *vgsurface,
       vgDestroyPaint (vgsurface->source_paint);
       vgsurface->source_paint = 0;
     }
+  if (vgsurface->source_image)
+    {
+      vgDestroyImage (vgsurface->source_paint);
+      vgsurface->source_image = 0;
+    }
+  return CAIRO_STATUS_SUCCESS;
 }
 
 static cairo_int_status_t
@@ -577,7 +605,21 @@ _cairo_openvg_surface_fill (void *asurface,
     goto BAIL;
 
   vgSetPaint(vgsurface->source_paint, VG_FILL_PATH);
+
+
+
+  if (vgsurface->source_image)
+    {
+      printf ("WARNING: attempting to paint with image pattern\n");
+      vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_MULTIPLY);
+      vgSetParameteri(vgsurface->source_image, VG_PAINT_PATTERN_TILING_MODE,
+                      VG_TILE_REPEAT);
+      /*vgPaintPattern(vgsurface->source_paint, vgsurface->source_image);*/
+
+    }
+
   vgDrawPath (vg_path.path, VG_FILL_PATH);
+
   vgDestroyPath (vg_path.path);
 
   teardown_source (vgsurface, source);
-- 
1.6.0.4