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      1 /**************************************************************************
      2  *
      3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sub license, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial portions
     15  * of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24  *
     25  **************************************************************************/
     26 
     27 #ifndef ARC_H
     28 #define ARC_H
     29 
     30 #include "VG/openvg.h"
     31 
     32 struct polygon;
     33 struct matrix;
     34 struct stroker;
     35 struct path;
     36 
     37 struct arc {
     38    VGPathSegment type;
     39 
     40    VGfloat cx, cy;
     41 
     42    VGfloat a, b;
     43 
     44    VGfloat theta;
     45    VGfloat cos_theta, sin_theta;
     46 
     47    VGfloat eta1;
     48    VGfloat eta2;
     49 
     50    VGfloat x1, y1, x2, y2;
     51 
     52    VGboolean is_valid;
     53 };
     54 
     55 void arc_init(struct arc *arc,
     56               VGPathSegment type,
     57               VGfloat x1, VGfloat y1,
     58               VGfloat x2, VGfloat y2,
     59               VGfloat rh, VGfloat rv,
     60               VGfloat rot);
     61 
     62 void arc_add_to_polygon(struct arc *arc,
     63                         struct polygon *poly,
     64                         struct matrix *matrix);
     65 
     66 
     67 void arc_to_path(struct arc *arc,
     68                  struct path *p,
     69                  struct matrix *matrix);
     70 
     71 void arc_stroke_cb(struct arc *arc,
     72                    struct stroker *stroke,
     73                    struct matrix *matrix);
     74 
     75 void arc_stroker_emit(struct arc *arc,
     76                       struct stroker *stroke,
     77                       struct matrix *matrix);
     78 
     79 
     80 #endif
     81