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/*
* Copyright © 2004 David Reveman, Peter Nilsson
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the names of
* David Reveman and Peter Nilsson not be used in advertising or
* publicity pertaining to distribution of the software without
* specific, written prior permission. David Reveman and Peter Nilsson
* makes no representations about the suitability of this software for
* any purpose. It is provided "as is" without express or implied warranty.
*
* DAVID REVEMAN AND PETER NILSSON DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DAVID REVEMAN AND
* PETER NILSSON BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
* OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* Authors: David Reveman <davidr@novell.com>
* Peter Nilsson <c99pnn@cs.umu.se>
*/
#ifdef HAVE_CONFIG_H
# include "../config.h"
#endif
#include "glitzint.h"
void
glitz_set_operator (glitz_gl_proc_address_list_t *gl, glitz_operator_t op) {
switch (op) {
case GLITZ_OPERATOR_CLEAR:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ZERO, GLITZ_GL_ZERO);
break;
case GLITZ_OPERATOR_SRC:
gl->disable (GLITZ_GL_BLEND);
break;
case GLITZ_OPERATOR_DST:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ZERO, GLITZ_GL_ONE);
break;
case GLITZ_OPERATOR_OVER:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ONE, GLITZ_GL_ONE_MINUS_SRC_ALPHA);
break;
case GLITZ_OPERATOR_OVER_REVERSE:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ONE_MINUS_DST_ALPHA, GLITZ_GL_ONE);
break;
case GLITZ_OPERATOR_IN:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_DST_ALPHA, GLITZ_GL_ZERO);
break;
case GLITZ_OPERATOR_IN_REVERSE:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ZERO, GLITZ_GL_SRC_ALPHA);
break;
case GLITZ_OPERATOR_OUT:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ONE_MINUS_DST_ALPHA, GLITZ_GL_ZERO);
break;
case GLITZ_OPERATOR_OUT_REVERSE:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ZERO, GLITZ_GL_ONE_MINUS_SRC_ALPHA);
break;
case GLITZ_OPERATOR_ATOP:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_DST_ALPHA, GLITZ_GL_ONE_MINUS_SRC_ALPHA);
break;
case GLITZ_OPERATOR_ATOP_REVERSE:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ONE_MINUS_DST_ALPHA, GLITZ_GL_SRC_ALPHA);
break;
case GLITZ_OPERATOR_XOR:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ONE_MINUS_DST_ALPHA,
GLITZ_GL_ONE_MINUS_SRC_ALPHA);
break;
case GLITZ_OPERATOR_ADD:
gl->enable (GLITZ_GL_BLEND);
gl->blend_func (GLITZ_GL_ONE, GLITZ_GL_ONE);
break;
}
}
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