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#include <gtk/gtk.h>
#include <config.h>
#include "pixman-private.h" /* For image->bits.format
* FIXME: there should probably be public API for this
*/
#include "gtk-utils.h"
GdkPixbuf *
pixbuf_from_argb32 (uint32_t *bits,
gboolean has_alpha,
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 / 4) + w];
guint r, g, b, a;
char *pb = (char *)p_bits;
pb += h * p_stride + w * 4;
r = (argb & 0x00ff0000) >> 16;
g = (argb & 0x0000ff00) >> 8;
b = (argb & 0x000000ff) >> 0;
a = has_alpha? (argb & 0xff000000) >> 24 : 0xff;
if (a)
{
r = (r * 255) / a;
g = (g * 255) / a;
b = (b * 255) / a;
}
if (r > 255) r = 255;
if (g > 255) g = 255;
if (b > 255) b = 255;
pb[0] = r;
pb[1] = g;
pb[2] = b;
pb[3] = a;
}
}
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;
}
void
show_image (pixman_image_t *image)
{
GtkWidget *window;
GdkPixbuf *pixbuf;
int width, height, stride;
int argc;
char **argv;
char *arg0 = g_strdup ("pixman-test-program");
gboolean has_alpha;
pixman_format_code_t format;
argc = 1;
argv = (char **)&arg0;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
width = pixman_image_get_width (image);
height = pixman_image_get_height (image);
stride = pixman_image_get_stride (image);
gtk_window_set_default_size (GTK_WINDOW (window), width, height);
format = image->bits.format;
if (format == PIXMAN_a8r8g8b8)
has_alpha = TRUE;
else if (format == PIXMAN_x8r8g8b8)
has_alpha = FALSE;
else
g_error ("Can't deal with this format: %x\n", format);
pixbuf = pixbuf_from_argb32 (pixman_image_get_data (image), has_alpha,
width, height, 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 ();
}
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