1 files changed, 155 insertions, 0 deletions
diff --git a/pixman/test/composite-test.c b/pixman/test/composite-test.c
new file mode 100644
index 000000000..d6596f496
--- /dev/null
+++ b/pixman/test/composite-test.c
@@ -0,0 +1,155 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "pixman.h"
+
+#include <gtk/gtk.h>
+
+static GdkPixbuf *
+pixbuf_from_argb32 (uint32_t *bits,
+		    int width,
+		    int height,
+		    int stride)
+{
+    GdkPixbuf *pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE,
+					8, width, height);
+    int p_stride = gdk_pixbuf_get_rowstride (pixbuf);
+    guint32 *p_bits = (guint32 *)gdk_pixbuf_get_pixels (pixbuf);
+    int w, h;
+
+    for (h = 0; h < height; ++h)
+    {
+	for (w = 0; w < width; ++w)
+	{
+	    uint32_t argb = bits[h * stride + w];
+	    guint32 rgba;
+
+	    rgba = (argb << 8) | (argb >> 24);
+
+	    p_bits[h * (p_stride / 4) + w] = rgba;
+	}
+    }
+
+    return pixbuf;
+}
+
+static gboolean
+on_expose (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
+{
+    GdkPixbuf *pixbuf = data;
+    
+    gdk_draw_pixbuf (widget->window, NULL,
+		     pixbuf, 0, 0, 0, 0,
+		     gdk_pixbuf_get_width (pixbuf),
+		     gdk_pixbuf_get_height (pixbuf),
+		     GDK_RGB_DITHER_NONE,
+		     0, 0);
+
+    return TRUE;
+}
+
+static void
+show_window (uint32_t *bits, int w, int h, int stride)
+{
+    GdkPixbuf *pixbuf;
+
+    GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+
+    pixbuf = pixbuf_from_argb32 (bits, w, h, stride);
+
+    g_signal_connect (window, "expose_event", G_CALLBACK (on_expose), pixbuf);
+    
+    gtk_widget_show (window);
+
+    gtk_main ();
+}
+
+#define WIDTH	100
+#define HEIGHT	100
+
+static uint32_t
+reader (const void *src, int size)
+{
+    switch (size)
+    {
+    case 1:
+	return *(uint8_t *)src;
+    case 2:
+	return *(uint16_t *)src;
+    case 4:
+	return *(uint32_t *)src;
+    default:
+	g_assert_not_reached();
+    }
+}
+
+static void
+writer (void *src, uint32_t value, int size)
+{
+    switch (size)
+    {
+    case 1:
+	*(uint8_t *)src = value;
+	break;
+
+    case 2:
+	*(uint16_t *)src = value;
+	break;
+
+    case 4:
+	*(uint32_t *)src = value;
+	break;
+    }
+}
+
+int
+main (int argc, char **argv)
+{
+    uint32_t *src = malloc (WIDTH * HEIGHT * 4);
+    uint32_t *dest = malloc (WIDTH * HEIGHT * 4);
+    pixman_image_t *src_img;
+    pixman_image_t *dest_img;
+    int i, j;
+    gtk_init (&argc, &argv);
+
+    for (i = 0; i < WIDTH * HEIGHT; ++i)
+	src[i] = 0x7f7f0000; /* red */
+
+    for (i = 0; i < WIDTH * HEIGHT; ++i)
+	dest[i] = 0x7f0000ff; /* blue */
+    
+    src_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
+					WIDTH, HEIGHT,
+					src,
+					WIDTH * 4);
+
+    dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
+					 WIDTH, HEIGHT,
+					 dest,
+					 WIDTH * 4);
+
+    pixman_image_set_accessors (src_img, reader, writer);
+    pixman_image_set_accessors (dest_img, reader, writer);
+    
+    pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img,
+			    0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+#if 0
+    for (i = 0; i < WIDTH; ++i)
+    {
+	for (j = 0; j < HEIGHT; ++j)
+	    g_print ("%x, ", dest[i * WIDTH + j]);
+	g_print ("\n");
+    }
+#endif
+    
+    show_window (dest, WIDTH, HEIGHT, WIDTH);
+    
+    pixman_image_unref (src_img);
+    pixman_image_unref (dest_img);
+    free (src);
+    free (dest);
+
+
+    
+    return 0;
+}