diff options
Diffstat (limited to 'lib/pixman/test/gradient-test.c')
| -rw-r--r-- | lib/pixman/test/gradient-test.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/lib/pixman/test/gradient-test.c b/lib/pixman/test/gradient-test.c new file mode 100644 index 000000000..8a99ff0e6 --- /dev/null +++ b/lib/pixman/test/gradient-test.c @@ -0,0 +1,147 @@ +#include <stdio.h> +#include <stdlib.h> +#include <gtk/gtk.h> +#include "pixman.h" + +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 abgr; + + abgr = (argb & 0xff000000) | + (argb & 0xff) << 16 | + (argb & 0x00ff00) | + (argb & 0xff0000) >> 16; + + p_bits[h * (p_stride / 4) + w] = abgr; + } + } + + 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); + g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL); + + gtk_widget_show (window); + + gtk_main (); +} + +int +main (int argc, char **argv) +{ +#define WIDTH 200 +#define HEIGHT 200 + + uint32_t *dest = malloc (WIDTH * HEIGHT * 4); + pixman_image_t *src_img; + pixman_image_t *dest_img; + int i; + pixman_gradient_stop_t stops[2] = + { + { pixman_int_to_fixed (0), { 0xffff, 0x0000, 0x0000, 0xffff } }, + { pixman_int_to_fixed (1), { 0xffff, 0xffff, 0x0000, 0xffff } } + }; + pixman_point_fixed_t p1 = { 0, 0 }; + pixman_point_fixed_t p2 = { pixman_int_to_fixed (WIDTH), + pixman_int_to_fixed (HEIGHT) }; + pixman_transform_t trans = { + { { pixman_double_to_fixed (2), pixman_double_to_fixed (0.5), pixman_double_to_fixed (-100), }, + { pixman_double_to_fixed (0), pixman_double_to_fixed (2), pixman_double_to_fixed (0), }, + { pixman_double_to_fixed (0), pixman_double_to_fixed (0.004990), pixman_double_to_fixed (1.0) } + } + }; + + pixman_transform_t id = { + { { pixman_fixed_1, 0, 0 }, + { 0, pixman_fixed_1, 0 }, + { 0, 0, pixman_fixed_1 } } + }; + + pixman_point_fixed_t c_inner; + pixman_point_fixed_t c_outer; + pixman_fixed_t r_inner; + pixman_fixed_t r_outer; + + gtk_init (&argc, &argv); + + for (i = 0; i < WIDTH * HEIGHT; ++i) + dest[i] = 0x3f0000ff; /* pale blue */ + + dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, + WIDTH, HEIGHT, + dest, + WIDTH * 4); + + c_inner.x = pixman_double_to_fixed (50.0); + c_inner.y = pixman_double_to_fixed (50.0); + c_outer.x = pixman_double_to_fixed (50.0); + c_outer.y = pixman_double_to_fixed (50.0); + r_inner = 0; + r_outer = pixman_double_to_fixed (50.0); + + src_img = pixman_image_create_radial_gradient (&c_inner, &c_outer, + r_inner, r_outer, + stops, 2); + +#if 0 + src_img = pixman_image_create_linear_gradient (&p1, &p2, + stops, 2); + +#endif + pixman_image_set_transform (src_img, &trans); + + pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img, + 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT); + + printf ("0, 0: %x\n", dest[0]); + printf ("10, 10: %x\n", dest[10 * 10 + 10]); + printf ("w, h: %x\n", dest[(HEIGHT - 1) * 100 + (WIDTH - 1)]); + + show_window (dest, WIDTH, HEIGHT, WIDTH); + + pixman_image_unref (src_img); + pixman_image_unref (dest_img); + free (dest); + + return 0; +} |