mutter/src/testgradient.c

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/* Metacity gradient test program */
/*
* Copyright (C) 2002 Havoc Pennington
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA. */
#include "gradient.h"
#include <gtk/gtk.h>
typedef void (* RenderGradientFunc) (GdkDrawable *drawable,
GdkGC *gc,
int width,
int height);
static void
render_simple (GdkDrawable *drawable,
GdkGC *gc,
int width, int height,
MetaGradientType type)
{
GdkPixbuf *pixbuf;
GdkColor from, to;
gdk_color_parse ("blue", &from);
gdk_color_parse ("green", &to);
pixbuf = meta_gradient_create_simple (width, height,
&from, &to,
type);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_MAX,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static void
render_vertical_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_VERTICAL);
}
static void
render_horizontal_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_HORIZONTAL);
}
static void
render_diagonal_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_simple (drawable, gc, width, height, META_GRADIENT_DIAGONAL);
}
static void
render_multi (GdkDrawable *drawable,
GdkGC *gc,
int width, int height,
MetaGradientType type)
{
GdkPixbuf *pixbuf;
#define N_COLORS 5
GdkColor colors[N_COLORS];
gdk_color_parse ("red", &colors[0]);
gdk_color_parse ("blue", &colors[1]);
gdk_color_parse ("orange", &colors[2]);
gdk_color_parse ("pink", &colors[3]);
gdk_color_parse ("green", &colors[4]);
pixbuf = meta_gradient_create_multi (width, height,
colors, N_COLORS,
type);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static void
render_vertical_multi_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_multi (drawable, gc, width, height, META_GRADIENT_VERTICAL);
}
static void
render_horizontal_multi_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_multi (drawable, gc, width, height, META_GRADIENT_HORIZONTAL);
}
static void
render_diagonal_multi_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
render_multi (drawable, gc, width, height, META_GRADIENT_DIAGONAL);
}
static void
render_interwoven_func (GdkDrawable *drawable,
GdkGC *gc,
int width, int height)
{
GdkPixbuf *pixbuf;
#define N_COLORS 4
GdkColor colors[N_COLORS];
gdk_color_parse ("red", &colors[0]);
gdk_color_parse ("blue", &colors[1]);
gdk_color_parse ("pink", &colors[2]);
gdk_color_parse ("green", &colors[3]);
pixbuf = meta_gradient_create_interwoven (width, height,
colors, height / 10,
colors + 2, height / 14);
gdk_pixbuf_render_to_drawable (pixbuf,
drawable,
gc,
0, 0,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
0, 0);
g_object_unref (G_OBJECT (pixbuf));
}
static gboolean
expose_callback (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
RenderGradientFunc func = data;
(* func) (widget->window,
widget->style->fg_gc[widget->state],
widget->allocation.width,
widget->allocation.height);
return TRUE;
}
static GtkWidget*
create_gradient_window (const char *title,
RenderGradientFunc func)
{
GtkWidget *window;
GtkWidget *drawing_area;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), title);
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawing_area, 1, 1);
gtk_window_set_default_size (GTK_WINDOW (window), 175, 175);
g_signal_connect (G_OBJECT (drawing_area),
"expose_event",
G_CALLBACK (expose_callback),
func);
gtk_container_add (GTK_CONTAINER (window), drawing_area);
gtk_widget_show_all (window);
return window;
}
static void
meta_gradient_test (void)
{
GtkWidget *window;
window = create_gradient_window ("Simple vertical",
render_vertical_func);
window = create_gradient_window ("Simple horizontal",
render_horizontal_func);
window = create_gradient_window ("Simple diagonal",
render_diagonal_func);
window = create_gradient_window ("Multi vertical",
render_vertical_multi_func);
window = create_gradient_window ("Multi horizontal",
render_horizontal_multi_func);
window = create_gradient_window ("Multi diagonal",
render_diagonal_multi_func);
window = create_gradient_window ("Interwoven",
render_interwoven_func);
}
int
main (int argc, char **argv)
{
gtk_init (&argc, &argv);
meta_gradient_test ();
gtk_main ();
return 0;
}