| #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; |
| } |