d4b91dc654
2002-05-31 Havoc Pennington <hp@redhat.com> * src/theme.c (multiply_alpha): now just uses meta_gradient_add_alpha (draw_op_as_pixbuf): implement alpha gradients for tint, gradient, and image draw ops, so I can implement garrett's stuff. * src/gradient.c (meta_gradient_add_alpha): new function to multiply the alpha channel of a pixbuf by an alpha gradient
63 lines
2.6 KiB
C
63 lines
2.6 KiB
C
/* Metacity gradient rendering */
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/*
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* Copyright (C) 2001 Havoc Pennington, 99% copied from wrlib in
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* WindowMaker, Copyright (C) 1997-2000 Dan Pascu and Alfredo Kojima
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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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#ifndef META_GRADIENT_H
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#define META_GRADIENT_H
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gdk/gdkcolor.h>
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typedef enum
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{
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META_GRADIENT_VERTICAL,
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META_GRADIENT_HORIZONTAL,
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META_GRADIENT_DIAGONAL,
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META_GRADIENT_LAST
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} MetaGradientType;
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GdkPixbuf* meta_gradient_create_simple (int width,
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int height,
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const GdkColor *from,
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const GdkColor *to,
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MetaGradientType style);
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GdkPixbuf* meta_gradient_create_multi (int width,
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int height,
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const GdkColor *colors,
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int n_colors,
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MetaGradientType style);
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GdkPixbuf* meta_gradient_create_interwoven (int width,
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int height,
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const GdkColor colors1[2],
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int thickness1,
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const GdkColor colors2[2],
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int thickness2);
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/* Generate an alpha gradient and multiply it with the existing alpha
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* channel of the given pixbuf
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*/
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void meta_gradient_add_alpha (GdkPixbuf *pixbuf,
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const guchar *alphas,
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int n_alphas,
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MetaGradientType type);
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#endif
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