114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
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#include <gtk/gtk.h>
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#include <config.h>
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#include "pixman-private.h" /* For image->bits.format
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* FIXME: there should probably be public API for this
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*/
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#include "utils.h"
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GdkPixbuf *
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pixbuf_from_argb32 (uint32_t *bits,
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gboolean has_alpha,
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int width,
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int height,
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int stride)
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{
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GdkPixbuf *pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE,
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8, width, height);
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int p_stride = gdk_pixbuf_get_rowstride (pixbuf);
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guint32 *p_bits = (guint32 *)gdk_pixbuf_get_pixels (pixbuf);
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int w, h;
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for (h = 0; h < height; ++h)
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{
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for (w = 0; w < width; ++w)
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{
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uint32_t argb = bits[h * (stride / 4) + w];
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guint r, g, b, a;
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char *pb = (char *)p_bits;
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pb += h * p_stride + w * 4;
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r = (argb & 0x00ff0000) >> 16;
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g = (argb & 0x0000ff00) >> 8;
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b = (argb & 0x000000ff) >> 0;
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a = has_alpha? (argb & 0xff000000) >> 24 : 0xff;
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if (a)
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{
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r = (r * 255) / a;
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g = (g * 255) / a;
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b = (b * 255) / a;
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}
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if (r > 255) r = 255;
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if (g > 255) g = 255;
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if (b > 255) b = 255;
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pb[0] = r;
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pb[1] = g;
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pb[2] = b;
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pb[3] = a;
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}
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}
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return pixbuf;
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}
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static gboolean
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on_expose (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
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{
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GdkPixbuf *pixbuf = data;
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gdk_draw_pixbuf (widget->window, NULL,
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pixbuf, 0, 0, 0, 0,
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gdk_pixbuf_get_width (pixbuf),
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gdk_pixbuf_get_height (pixbuf),
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GDK_RGB_DITHER_NONE,
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0, 0);
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return TRUE;
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}
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void
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show_image (pixman_image_t *image)
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{
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GtkWidget *window;
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GdkPixbuf *pixbuf;
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int width, height, stride;
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int argc;
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char **argv;
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char *arg0 = g_strdup ("pixman-test-program");
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gboolean has_alpha;
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pixman_format_code_t format;
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argc = 1;
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argv = (char **)&arg0;
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gtk_init (&argc, &argv);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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width = pixman_image_get_width (image);
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height = pixman_image_get_height (image);
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stride = pixman_image_get_stride (image);
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format = image->bits.format;
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if (format == PIXMAN_a8r8g8b8)
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has_alpha = TRUE;
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else if (format == PIXMAN_x8r8g8b8)
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has_alpha = FALSE;
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else
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g_error ("Can't deal with this format: %x\n", format);
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pixbuf = pixbuf_from_argb32 (pixman_image_get_data (image), has_alpha,
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width, height, stride);
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g_signal_connect (window, "expose_event", G_CALLBACK (on_expose), pixbuf);
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g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL);
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gtk_widget_show (window);
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gtk_main ();
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}
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