0201fcfc6c
2006-10-01 Elijah Newren <newren gmail com> * src/*.[ch]: Stick an emacs comment directive at the beginning of all the code files so that people using emacs will be more likely to get coding style correct in their patches. We still need a similar vi directive. #358866
348 lines
9.4 KiB
C
348 lines
9.4 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* Metacity gradient test program */
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/*
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* Copyright (C) 2002 Havoc Pennington
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA. */
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#include "gradient.h"
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#include <gtk/gtk.h>
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typedef void (* RenderGradientFunc) (GdkDrawable *drawable,
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GdkGC *gc,
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int width,
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int height);
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static void
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draw_checkerboard (GdkDrawable *drawable,
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int width,
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int height)
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{
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gint i, j, xcount, ycount;
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GdkGC *gc1, *gc2;
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GdkColor color;
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#define CHECK_SIZE 10
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#define SPACING 2
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/* It would be a bit more efficient to keep these
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* GC's around instead of recreating on each expose, but
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* this is the lazy/slow way.
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*/
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gc1 = gdk_gc_new (drawable);
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color.red = 30000;
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color.green = 30000;
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color.blue = 30000;
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gdk_gc_set_rgb_fg_color (gc1, &color);
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gc2 = gdk_gc_new (drawable);
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color.red = 50000;
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color.green = 50000;
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color.blue = 50000;
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gdk_gc_set_rgb_fg_color (gc2, &color);
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xcount = 0;
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i = SPACING;
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while (i < width)
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{
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j = SPACING;
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ycount = xcount % 2; /* start with even/odd depending on row */
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while (j < height)
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{
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GdkGC *gc;
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if (ycount % 2)
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gc = gc1;
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else
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gc = gc2;
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/* If we're outside event->area, this will do nothing.
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* It might be mildly more efficient if we handled
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* the clipping ourselves, but again we're feeling lazy.
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*/
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gdk_draw_rectangle (drawable,
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gc,
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TRUE,
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i, j,
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CHECK_SIZE,
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CHECK_SIZE);
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j += CHECK_SIZE + SPACING;
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++ycount;
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}
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i += CHECK_SIZE + SPACING;
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++xcount;
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}
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g_object_unref (G_OBJECT (gc1));
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g_object_unref (G_OBJECT (gc2));
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}
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static void
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render_simple (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height,
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MetaGradientType type,
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gboolean with_alpha)
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{
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GdkPixbuf *pixbuf;
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GdkColor from, to;
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gdk_color_parse ("blue", &from);
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gdk_color_parse ("green", &to);
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pixbuf = meta_gradient_create_simple (width, height,
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&from, &to,
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type);
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if (with_alpha)
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{
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const unsigned char alphas[] = { 0xff, 0xaa, 0x2f, 0x0, 0xcc, 0xff, 0xff };
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if (!gdk_pixbuf_get_has_alpha (pixbuf))
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{
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GdkPixbuf *new_pixbuf;
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new_pixbuf = gdk_pixbuf_add_alpha (pixbuf, FALSE, 0, 0, 0);
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g_object_unref (G_OBJECT (pixbuf));
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pixbuf = new_pixbuf;
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}
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meta_gradient_add_alpha (pixbuf,
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alphas, G_N_ELEMENTS (alphas),
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META_GRADIENT_HORIZONTAL);
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draw_checkerboard (drawable, width, height);
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}
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gdk_pixbuf_render_to_drawable (pixbuf,
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drawable,
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gc,
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0, 0,
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0, 0, width, height,
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GDK_RGB_DITHER_MAX,
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0, 0);
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g_object_unref (G_OBJECT (pixbuf));
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}
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static void
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render_vertical_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_simple (drawable, gc, width, height, META_GRADIENT_VERTICAL, FALSE);
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}
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static void
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render_horizontal_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_simple (drawable, gc, width, height, META_GRADIENT_HORIZONTAL, FALSE);
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}
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static void
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render_diagonal_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_simple (drawable, gc, width, height, META_GRADIENT_DIAGONAL, FALSE);
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}
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static void
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render_diagonal_alpha_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_simple (drawable, gc, width, height, META_GRADIENT_DIAGONAL, TRUE);
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}
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static void
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render_multi (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height,
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MetaGradientType type)
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{
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GdkPixbuf *pixbuf;
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#define N_COLORS 5
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GdkColor colors[N_COLORS];
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gdk_color_parse ("red", &colors[0]);
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gdk_color_parse ("blue", &colors[1]);
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gdk_color_parse ("orange", &colors[2]);
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gdk_color_parse ("pink", &colors[3]);
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gdk_color_parse ("green", &colors[4]);
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pixbuf = meta_gradient_create_multi (width, height,
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colors, N_COLORS,
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type);
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gdk_pixbuf_render_to_drawable (pixbuf,
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drawable,
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gc,
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0, 0,
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0, 0, width, height,
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GDK_RGB_DITHER_NORMAL,
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0, 0);
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g_object_unref (G_OBJECT (pixbuf));
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#undef N_COLORS
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}
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static void
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render_vertical_multi_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_multi (drawable, gc, width, height, META_GRADIENT_VERTICAL);
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}
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static void
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render_horizontal_multi_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_multi (drawable, gc, width, height, META_GRADIENT_HORIZONTAL);
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}
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static void
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render_diagonal_multi_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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render_multi (drawable, gc, width, height, META_GRADIENT_DIAGONAL);
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}
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static void
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render_interwoven_func (GdkDrawable *drawable,
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GdkGC *gc,
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int width, int height)
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{
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GdkPixbuf *pixbuf;
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#define N_COLORS 4
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GdkColor colors[N_COLORS];
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gdk_color_parse ("red", &colors[0]);
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gdk_color_parse ("blue", &colors[1]);
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gdk_color_parse ("pink", &colors[2]);
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gdk_color_parse ("green", &colors[3]);
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pixbuf = meta_gradient_create_interwoven (width, height,
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colors, height / 10,
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colors + 2, height / 14);
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gdk_pixbuf_render_to_drawable (pixbuf,
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drawable,
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gc,
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0, 0,
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0, 0, width, height,
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GDK_RGB_DITHER_NORMAL,
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0, 0);
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g_object_unref (G_OBJECT (pixbuf));
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}
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static gboolean
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expose_callback (GtkWidget *widget,
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GdkEventExpose *event,
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gpointer data)
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{
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RenderGradientFunc func = data;
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(* func) (widget->window,
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widget->style->fg_gc[widget->state],
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widget->allocation.width,
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widget->allocation.height);
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return TRUE;
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}
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static GtkWidget*
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create_gradient_window (const char *title,
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RenderGradientFunc func)
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{
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GtkWidget *window;
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GtkWidget *drawing_area;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_title (GTK_WINDOW (window), title);
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drawing_area = gtk_drawing_area_new ();
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gtk_widget_set_size_request (drawing_area, 1, 1);
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gtk_window_set_default_size (GTK_WINDOW (window), 175, 175);
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g_signal_connect (G_OBJECT (drawing_area),
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"expose_event",
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G_CALLBACK (expose_callback),
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func);
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gtk_container_add (GTK_CONTAINER (window), drawing_area);
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gtk_widget_show_all (window);
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return window;
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}
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static void
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meta_gradient_test (void)
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{
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GtkWidget *window;
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window = create_gradient_window ("Simple vertical",
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render_vertical_func);
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window = create_gradient_window ("Simple horizontal",
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render_horizontal_func);
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window = create_gradient_window ("Simple diagonal",
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render_diagonal_func);
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window = create_gradient_window ("Multi vertical",
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render_vertical_multi_func);
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window = create_gradient_window ("Multi horizontal",
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render_horizontal_multi_func);
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window = create_gradient_window ("Multi diagonal",
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render_diagonal_multi_func);
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window = create_gradient_window ("Interwoven",
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render_interwoven_func);
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window = create_gradient_window ("Simple diagonal with horizontal multi alpha",
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render_diagonal_alpha_func);
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}
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int
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main (int argc, char **argv)
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{
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gtk_init (&argc, &argv);
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meta_gradient_test ();
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gtk_main ();
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return 0;
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}
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