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-rw-r--r--libs/pixman-0.40.0/demos/gtk-utils.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/libs/pixman-0.40.0/demos/gtk-utils.c b/libs/pixman-0.40.0/demos/gtk-utils.c
new file mode 100644
index 0000000..32d4aec
--- /dev/null
+++ b/libs/pixman-0.40.0/demos/gtk-utils.c
@@ -0,0 +1,179 @@
+#include <gtk/gtk.h>
+#include <config.h>
+#include "../test/utils.h"
+#include "gtk-utils.h"
+
+pixman_image_t *
+pixman_image_from_file (const char *filename, pixman_format_code_t format)
+{
+ GdkPixbuf *pixbuf;
+ pixman_image_t *image;
+ int width, height;
+ uint32_t *data, *d;
+ uint8_t *gdk_data;
+ int n_channels;
+ int j, i;
+ int stride;
+
+ if (!(pixbuf = gdk_pixbuf_new_from_file (filename, NULL)))
+ return NULL;
+
+ image = NULL;
+
+ width = gdk_pixbuf_get_width (pixbuf);
+ height = gdk_pixbuf_get_height (pixbuf);
+ n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+ gdk_data = gdk_pixbuf_get_pixels (pixbuf);
+ stride = gdk_pixbuf_get_rowstride (pixbuf);
+
+ if (!(data = malloc (width * height * sizeof (uint32_t))))
+ goto out;
+
+ d = data;
+ for (j = 0; j < height; ++j)
+ {
+ uint8_t *gdk_line = gdk_data;
+
+ for (i = 0; i < width; ++i)
+ {
+ int r, g, b, a;
+ uint32_t pixel;
+
+ r = gdk_line[0];
+ g = gdk_line[1];
+ b = gdk_line[2];
+
+ if (n_channels == 4)
+ a = gdk_line[3];
+ else
+ a = 0xff;
+
+ r = (r * a + 127) / 255;
+ g = (g * a + 127) / 255;
+ b = (b * a + 127) / 255;
+
+ pixel = (a << 24) | (r << 16) | (g << 8) | b;
+
+ *d++ = pixel;
+ gdk_line += n_channels;
+ }
+
+ gdk_data += stride;
+ }
+
+ image = pixman_image_create_bits (
+ format, width, height, data, width * 4);
+
+out:
+ g_object_unref (pixbuf);
+ return image;
+}
+
+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 i;
+
+ for (i = 0; i < height; ++i)
+ {
+ uint32_t *src_row = &bits[i * (stride / 4)];
+ uint32_t *dst_row = p_bits + i * (p_stride / 4);
+
+ a8r8g8b8_to_rgba_np (dst_row, src_row, width);
+ }
+
+ return pixbuf;
+}
+
+static gboolean
+on_expose (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
+{
+ pixman_image_t *pimage = data;
+ int width = pixman_image_get_width (pimage);
+ int height = pixman_image_get_height (pimage);
+ int stride = pixman_image_get_stride (pimage);
+ cairo_surface_t *cimage;
+ cairo_format_t format;
+ cairo_t *cr;
+
+ if (pixman_image_get_format (pimage) == PIXMAN_x8r8g8b8)
+ format = CAIRO_FORMAT_RGB24;
+ else
+ format = CAIRO_FORMAT_ARGB32;
+
+ cimage = cairo_image_surface_create_for_data (
+ (uint8_t *)pixman_image_get_data (pimage),
+ format, width, height, stride);
+
+ cr = gdk_cairo_create (widget->window);
+
+ cairo_rectangle (cr, 0, 0, width, height);
+ cairo_set_source_surface (cr, cimage, 0, 0);
+ cairo_fill (cr);
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (cimage);
+
+ return TRUE;
+}
+
+void
+show_image (pixman_image_t *image)
+{
+ GtkWidget *window;
+ int width, height;
+ int argc;
+ char **argv;
+ char *arg0 = g_strdup ("pixman-test-program");
+ pixman_format_code_t format;
+ pixman_image_t *copy;
+
+ 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);
+
+ gtk_window_set_default_size (GTK_WINDOW (window), width, height);
+
+ format = pixman_image_get_format (image);
+
+ /* We always display the image as if it contains sRGB data. That
+ * means that no conversion should take place when the image
+ * has the a8r8g8b8_sRGB format.
+ */
+ switch (format)
+ {
+ case PIXMAN_a8r8g8b8_sRGB:
+ case PIXMAN_a8r8g8b8:
+ case PIXMAN_x8r8g8b8:
+ copy = pixman_image_ref (image);
+ break;
+
+ default:
+ copy = pixman_image_create_bits (PIXMAN_a8r8g8b8,
+ width, height, NULL, -1);
+ pixman_image_composite32 (PIXMAN_OP_SRC,
+ image, NULL, copy,
+ 0, 0, 0, 0, 0, 0,
+ width, height);
+ break;
+ }
+
+ g_signal_connect (window, "expose_event", G_CALLBACK (on_expose), copy);
+ g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL);
+
+ gtk_widget_show (window);
+
+ gtk_main ();
+}