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#include <gtk/gtk.h>
static void
add_to_grid (GtkWidget *grid,
int left,
int top,
int n_channels,
gboolean premul,
int width,
int height,
int stride,
GtkWidget *picture)
{
char *text;
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Channels"), left, top, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Width"), left, top + 1, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Height"), left, top + 2, 1, 1);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Stride"), left, top + 3, 1, 1);
text = g_strdup_printf ("%d%s", n_channels, premul ? " (premul)" : "");
gtk_grid_attach (GTK_GRID (grid), gtk_label_new (text), left + 1, top, 1, 1);
g_free (text);
text = g_strdup_printf ("%d", width);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new (text), left + 1, top + 1, 1, 1);
g_free (text);
text = g_strdup_printf ("%d", height);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new (text), left + 1, top + 2, 1, 1);
g_free (text);
text = g_strdup_printf ("%d", stride);
gtk_grid_attach (GTK_GRID (grid), gtk_label_new (text), left + 1, top + 3, 1, 1);
g_free (text);
gtk_grid_attach (GTK_GRID (grid), picture, left + 2, top + 0, 1, 4);
}
int
main (int argc, char *argv[])
{
GtkWidget *window, *grid;
GdkPixbuf *source, *pb, *pb2;
GError *error = NULL;
cairo_t *cr;
cairo_surface_t *surface;
GBytes *bytes;
GdkTexture *texture;
gtk_init ();
window = gtk_window_new ();
grid = gtk_grid_new ();
gtk_widget_set_margin_top (grid, 10);
gtk_widget_set_margin_bottom (grid, 10);
gtk_widget_set_margin_start (grid, 10);
gtk_widget_set_margin_end (grid, 10);
gtk_grid_set_row_spacing (GTK_GRID (grid), 10);
gtk_grid_set_column_spacing (GTK_GRID (grid), 10);
gtk_window_set_child (GTK_WINDOW (window), grid);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
200, 200, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
add_to_grid (grid, 0, 0,
gdk_pixbuf_get_n_channels (source),
FALSE,
gdk_pixbuf_get_width (source),
gdk_pixbuf_get_height (source),
gdk_pixbuf_get_rowstride (source),
gtk_picture_new_for_pixbuf (source));
g_object_unref (source);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
199, 199, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
add_to_grid (grid, 4, 0,
gdk_pixbuf_get_n_channels (source),
FALSE,
gdk_pixbuf_get_width (source),
gdk_pixbuf_get_height (source),
gdk_pixbuf_get_rowstride (source),
gtk_picture_new_for_pixbuf (source));
g_object_unref (source);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
201, 201, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_new_subpixbuf (source, 0, 0, 200, 200);
add_to_grid (grid, 8, 0,
gdk_pixbuf_get_n_channels (pb),
FALSE,
gdk_pixbuf_get_width (pb),
gdk_pixbuf_get_height (pb),
gdk_pixbuf_get_rowstride (pb),
gtk_picture_new_for_pixbuf (pb));
g_object_unref (source);
g_object_unref (pb);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
200, 200, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_add_alpha (source, FALSE, 0, 0, 0);
add_to_grid (grid, 0, 5,
gdk_pixbuf_get_n_channels (pb),
FALSE,
gdk_pixbuf_get_width (pb),
gdk_pixbuf_get_height (pb),
gdk_pixbuf_get_rowstride (pb),
gtk_picture_new_for_pixbuf (pb));
g_object_unref (source);
g_object_unref (pb);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
199, 199, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_add_alpha (source, FALSE, 0, 0, 0);
add_to_grid (grid, 4, 5,
gdk_pixbuf_get_n_channels (pb),
FALSE,
gdk_pixbuf_get_width (pb),
gdk_pixbuf_get_height (pb),
gdk_pixbuf_get_rowstride (pb),
gtk_picture_new_for_pixbuf (pb));
g_object_unref (source);
g_object_unref (pb);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
201, 201, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_add_alpha (source, FALSE, 0, 0, 0);
pb2 = gdk_pixbuf_new_subpixbuf (pb, 0, 0, 200, 200);
add_to_grid (grid, 8, 5,
gdk_pixbuf_get_n_channels (pb2),
FALSE,
gdk_pixbuf_get_width (pb2),
gdk_pixbuf_get_height (pb2),
gdk_pixbuf_get_rowstride (pb2),
gtk_picture_new_for_pixbuf (pb2));
g_object_unref (source);
g_object_unref (pb);
g_object_unref (pb2);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
200, 200, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_add_alpha (source, FALSE, 0, 0, 0);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, gdk_pixbuf_get_width (pb), gdk_pixbuf_get_height (pb));
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, pb, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
bytes = g_bytes_new (cairo_image_surface_get_data (surface),
cairo_image_surface_get_stride (surface) *
cairo_image_surface_get_height (surface));
texture = gdk_memory_texture_new (cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
GDK_MEMORY_DEFAULT,
bytes,
cairo_image_surface_get_stride (surface));
g_bytes_unref (bytes);
add_to_grid (grid, 0, 10,
4, TRUE,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
cairo_image_surface_get_stride (surface),
gtk_picture_new_for_paintable (GDK_PAINTABLE (texture)));
g_object_unref (source);
g_object_unref (pb);
cairo_surface_destroy (surface);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
199, 199, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_add_alpha (source, FALSE, 0, 0, 0);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, gdk_pixbuf_get_width (pb), gdk_pixbuf_get_height (pb));
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, pb, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
bytes = g_bytes_new (cairo_image_surface_get_data (surface),
cairo_image_surface_get_stride (surface) *
cairo_image_surface_get_height (surface));
texture = gdk_memory_texture_new (cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
GDK_MEMORY_DEFAULT,
bytes,
cairo_image_surface_get_stride (surface));
g_bytes_unref (bytes);
add_to_grid (grid, 4, 10,
4, TRUE,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
cairo_image_surface_get_stride (surface),
gtk_picture_new_for_paintable (GDK_PAINTABLE (texture)));
g_object_unref (source);
g_object_unref (pb);
cairo_surface_destroy (surface);
source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
201, 201, TRUE,
&error);
if (!source)
g_error ("%s", error->message);
pb = gdk_pixbuf_add_alpha (source, FALSE, 0, 0, 0);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, gdk_pixbuf_get_width (pb), gdk_pixbuf_get_height (pb));
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, pb, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
bytes = g_bytes_new (cairo_image_surface_get_data (surface),
cairo_image_surface_get_stride (surface) *
cairo_image_surface_get_height (surface));
texture = gdk_memory_texture_new (cairo_image_surface_get_width (surface) - 1,
cairo_image_surface_get_height (surface) - 1,
GDK_MEMORY_DEFAULT,
bytes,
cairo_image_surface_get_stride (surface));
g_bytes_unref (bytes);
add_to_grid (grid, 8, 10,
4, TRUE,
gdk_texture_get_width (texture),
gdk_texture_get_height (texture),
cairo_image_surface_get_stride (surface),
gtk_picture_new_for_paintable (GDK_PAINTABLE (texture)));
g_object_unref (source);
g_object_unref (pb);
cairo_surface_destroy (surface);
gtk_window_present (GTK_WINDOW (window));
while (g_list_model_get_n_items (gtk_window_get_toplevels ()) > 0)
g_main_context_iteration (NULL, TRUE);
return 0;
}
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