Add qemu 2.4.0

[kvmfornfv.git] / qemu / pixman / demos / linear-gradient.c

diff --git a/qemu/pixman/demos/linear-gradient.c b/qemu/pixman/demos/linear-gradient.c
new file mode 100644 (file)
index 0000000..46433a6
--- /dev/null
+++ b/qemu/pixman/demos/linear-gradient.c
@@ -0,0 +1,50 @@
+#include "../test/utils.h"
+#include "gtk-utils.h"
+
+#define WIDTH 1024
+#define HEIGHT 640
+
+int
+main (int argc, char **argv)
+{
+    pixman_image_t *src_img, *dest_img;
+    pixman_gradient_stop_t stops[] = {
+        { 0x00000, { 0x0000, 0x0000, 0x4444, 0xdddd } },
+        { 0x10000, { 0xeeee, 0xeeee, 0x8888, 0xdddd } },
+#if 0
+        /* These colors make it very obvious that dithering
+         * is useful even for 8-bit gradients
+         */
+       { 0x00000, { 0x6666, 0x3333, 0x3333, 0xffff } },
+       { 0x10000, { 0x3333, 0x6666, 0x6666, 0xffff } },
+#endif
+    };
+    pixman_point_fixed_t p1, p2;
+
+    enable_divbyzero_exceptions ();
+
+    dest_img = pixman_image_create_bits (PIXMAN_x8r8g8b8,
+                                        WIDTH, HEIGHT,
+                                        NULL, 0);
+
+    p1.x = p1.y = 0x0000;
+    p2.x = WIDTH << 16;
+    p2.y = HEIGHT << 16;
+    
+    src_img = pixman_image_create_linear_gradient (&p1, &p2, stops, ARRAY_LENGTH (stops));
+
+    pixman_image_composite32 (PIXMAN_OP_OVER,
+                             src_img,
+                             NULL,
+                             dest_img,
+                             0, 0,
+                             0, 0,
+                             0, 0,
+                             WIDTH, HEIGHT);
+
+    show_image (dest_img);
+
+    pixman_image_unref (dest_img);
+
+    return 0;
+}