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66 lines
1.7 KiB
66 lines
1.7 KiB
/*
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* Copyright © 2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _WESTON_VERTEX_CLIPPING_H
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#define _WESTON_VERTEX_CLIPPING_H
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struct polygon8 {
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float x[8];
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float y[8];
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int n;
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};
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struct clip_context {
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struct {
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float x;
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float y;
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} prev;
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struct {
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float x1, y1;
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float x2, y2;
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} clip;
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struct {
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float *x;
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float *y;
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} vertices;
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};
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float
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float_difference(float a, float b);
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int
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clip_simple(struct clip_context *ctx,
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struct polygon8 *surf,
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float *ex,
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float *ey);
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int
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clip_transformed(struct clip_context *ctx,
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struct polygon8 *surf,
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float *ex,
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float *ey);\
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#endif
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