1 files changed, 97 insertions, 0 deletions
diff --git a/pixman/demos/clip-test.c b/pixman/demos/clip-test.c
new file mode 100644
index 000000000..aa0df4482
--- /dev/null
+++ b/pixman/demos/clip-test.c
@@ -0,0 +1,97 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "pixman.h"
+#include "gtk-utils.h"
+
+#define WIDTH 200
+#define HEIGHT 200
+    
+static pixman_image_t *
+create_solid_bits (uint32_t pixel)
+{
+    uint32_t *pixels = malloc (WIDTH * HEIGHT * 4);
+    int i;
+    
+    for (i = 0; i < WIDTH * HEIGHT; ++i)
+	pixels[i] = pixel;
+
+    return pixman_image_create_bits (PIXMAN_a8r8g8b8,
+				     WIDTH, HEIGHT, 
+				     pixels,
+				     WIDTH * 4);
+}
+
+int
+main (int argc, char **argv)
+{
+    pixman_image_t *gradient_img;
+    pixman_image_t *src_img, *dst_img;
+    pixman_gradient_stop_t stops[2] =
+	{
+	    { pixman_int_to_fixed (0), { 0xffff, 0x0000, 0x0000, 0xffff } },
+	    { pixman_int_to_fixed (1), { 0xffff, 0xffff, 0x0000, 0xffff } }
+	};
+#if 0
+    pixman_point_fixed_t p1 = { 0, 0 };
+    pixman_point_fixed_t p2 = { pixman_int_to_fixed (WIDTH),
+				pixman_int_to_fixed (HEIGHT) };
+#endif
+    pixman_point_fixed_t c_inner;
+    pixman_point_fixed_t c_outer;
+    pixman_fixed_t r_inner;
+    pixman_fixed_t r_outer;
+    pixman_region32_t clip_region;
+    pixman_transform_t trans = {
+	{ { pixman_double_to_fixed (1.3), pixman_double_to_fixed (0), pixman_double_to_fixed (-0.5), },
+	  { pixman_double_to_fixed (0), pixman_double_to_fixed (1), pixman_double_to_fixed (-0.5), },
+	  { pixman_double_to_fixed (0), pixman_double_to_fixed (0), pixman_double_to_fixed (1.0) } 
+	}
+    };
+    
+    src_img = create_solid_bits (0xff0000ff);
+    
+    c_inner.x = pixman_double_to_fixed (100.0);
+    c_inner.y = pixman_double_to_fixed (100.0);
+    c_outer.x = pixman_double_to_fixed (100.0);
+    c_outer.y = pixman_double_to_fixed (100.0);
+    r_inner = 0;
+    r_outer = pixman_double_to_fixed (100.0);
+    
+    gradient_img = pixman_image_create_radial_gradient (&c_inner, &c_outer,
+							r_inner, r_outer,
+							stops, 2);
+
+#if 0
+    gradient_img = pixman_image_create_linear_gradient  (&p1, &p2,
+							 stops, 2);
+    
+#endif
+
+    pixman_image_composite (PIXMAN_OP_OVER, gradient_img, NULL, src_img,
+			    0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+    
+    pixman_region32_init_rect (&clip_region, 50, 0, 100, 200);
+    pixman_image_set_clip_region32 (src_img, &clip_region);
+    pixman_image_set_source_clipping (src_img, TRUE);
+    pixman_image_set_has_client_clip (src_img, TRUE);
+    pixman_image_set_transform (src_img, &trans);
+    pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL);
+    
+    dst_img = create_solid_bits (0xffff0000);
+    pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dst_img,
+			    0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+    
+
+#if 0
+    printf ("0, 0: %x\n", src[0]);
+    printf ("10, 10: %x\n", src[10 * 10 + 10]);
+    printf ("w, h: %x\n", src[(HEIGHT - 1) * 100 + (WIDTH - 1)]);
+#endif
+    
+    show_image (dst_img);
+    
+    pixman_image_unref (gradient_img);
+    pixman_image_unref (src_img);
+    
+    return 0;
+}