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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 STROKER_H
     28 #define STROKER_H
     29 
     30 #include "VG/openvg.h"
     31 #include "api_consts.h"
     32 
     33 struct path;
     34 struct vg_state;
     35 struct array;
     36 
     37 struct stroker {
     38    void (*begin)(struct stroker *stroker);
     39    void (*process_subpath)(struct stroker *stroker);
     40    void (*end)(struct stroker *stroker);
     41 
     42    struct array *segments;
     43    struct array *control_points;
     44    struct path *path;
     45 
     46    VGfloat back1_x, back1_y;
     47    VGfloat back2_x, back2_y;
     48 
     49    VGfloat     stroke_width;
     50    VGfloat     miter_limit;
     51    VGCapStyle  cap_style;
     52    VGJoinStyle join_style;
     53 
     54    VGPathCommand last_cmd;
     55 };
     56 
     57 struct dash_stroker {
     58    struct stroker base;
     59 
     60    struct stroker stroker;
     61 
     62    VGfloat dash_pattern[VEGA_MAX_DASH_COUNT];
     63    VGint dash_pattern_num;
     64    VGfloat dash_phase;
     65    VGboolean dash_phase_reset;
     66 };
     67 
     68 void stroker_init(struct stroker *stroker,
     69                   struct vg_state *state);
     70 void dash_stroker_init(struct stroker *stroker,
     71                        struct vg_state *state);
     72 void dash_stroker_cleanup(struct dash_stroker *stroker);
     73 void stroker_cleanup(struct stroker *stroker);
     74 
     75 void stroker_begin(struct stroker *stroker);
     76 void stroker_move_to(struct stroker *stroker, VGfloat x, VGfloat y);
     77 void stroker_line_to(struct stroker *stroker, VGfloat x, VGfloat y);
     78 void stroker_curve_to(struct stroker *stroker, VGfloat px1, VGfloat py1,
     79                       VGfloat px2, VGfloat py2,
     80                       VGfloat x, VGfloat y);
     81 void stroker_end(struct stroker *stroker);
     82 
     83 void stroker_emit_move_to(struct stroker *stroker, VGfloat x, VGfloat y);
     84 void stroker_emit_line_to(struct stroker *stroker, VGfloat x, VGfloat y);
     85 void stroker_emit_curve_to(struct stroker *stroker, VGfloat px1, VGfloat py1,
     86                            VGfloat px2, VGfloat py2,
     87                            VGfloat x, VGfloat y);
     88 
     89 #endif
     90