X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fpixman%2Fdemos%2Flinear-gradient.c;fp=qemu%2Fpixman%2Fdemos%2Flinear-gradient.c;h=46433a6e58091725aea2ead462ba530ed79b5828;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/pixman/demos/linear-gradient.c b/qemu/pixman/demos/linear-gradient.c
new file mode 100644
index 000000000..46433a6e5
--- /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;
+}