You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.8 KiB
65 lines
1.8 KiB
/*
|
|
* 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
|
|
|