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/*
* Copyright © 2012 Intel Corporation
*
* 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 name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS 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.
*/
#ifndef _WESTON_VERTEX_CLIPPING_H
#define _WESTON_VERTEX_CLIPPING_H
#include <GLES2/gl2.h>
struct polygon8 {
GLfloat x[8];
GLfloat y[8];
int n;
};
struct clip_context {
struct {
GLfloat x;
GLfloat y;
} prev;
struct {
GLfloat x1, y1;
GLfloat x2, y2;
} clip;
struct {
GLfloat *x;
GLfloat *y;
} vertices;
};
GLfloat
float_difference(GLfloat a, GLfloat b);
int
clip_simple(struct clip_context *ctx,
struct polygon8 *surf,
GLfloat *ex,
GLfloat *ey);
int
clip_transformed(struct clip_context *ctx,
struct polygon8 *surf,
GLfloat *ex,
GLfloat *ey);\
#endif
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