1 /*
2  * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24  */
25 
26 #ifndef ProcessPath_h_Included
27 #define ProcessPath_h_Included
28 
29 #include <float.h>
30 #include "jni_util.h"
31 
32 #define UPPER_BND (FLT_MAX/4.0f)
33 #define LOWER_BND (-UPPER_BND)
34 
35 /* Precision (in bits) used in forward differencing */
36 #define FWD_PREC    7
37 
38 /* Precision (in bits) used for the rounding in the midpoint test */
39 #define MDP_PREC    10
40 
41 #define MDP_MULT        (1<<MDP_PREC)
42 #define MDP_HALF_MULT   (MDP_MULT >> 1)
43 
44 /* Bit mask used to separate whole part from the fraction part of the
45  * number
46  */
47 #define MDP_W_MASK      (-MDP_MULT)
48 
49 /* Bit mask used to separate fractional part from the whole part of the
50  * number
51  */
52 #define MDP_F_MASK      (MDP_MULT-1)
53 
54 typedef struct _DrawHandler {
55     void (*pDrawLine)(struct _DrawHandler* hnd,
56                       jint x0, jint y0, jint x1, jint y1);
57 
58     void (*pDrawPixel)(struct _DrawHandler* hnd, jint x0, jint y0);
59 
60     void (*pDrawScanline)(struct _DrawHandler* hnd, jint x0, jint x1, jint y0);
61     // TODO Change following names to smth like outXMin
62     jint xMin, yMin, xMax, yMax;
63 
64     /* Boundary values with stroke control rendering hint applied */
65     jfloat xMinf, yMinf, xMaxf, yMaxf;
66 
67     void* pData;
68 } DrawHandler;
69 
70 typedef enum {
71     PH_MODE_DRAW_CLIP,
72     PH_MODE_FILL_CLIP
73 } PHClip;
74 
75 /* Constants representing KEY_STROKE_CONTROL rendering hints */
76 typedef enum {
77     PH_STROKE_PURE,   /* RenderingHints.VALUE_STROKE_PURE    */
78     PH_STROKE_DEFAULT /* RenderingHints.VALUE_STROKE_DEFAULT */
79 } PHStroke;
80 
81 typedef struct _ProcessHandler {
82     void (*pProcessFixedLine)(struct _ProcessHandler* hnd,
83                               jint x1,jint y1,
84                               jint x2,jint y2, jint* pixelInfo,
85                               jboolean checkBounds,
86                               jboolean endSubPath);
87     void (*pProcessEndSubPath)(struct _ProcessHandler* hnd);
88     DrawHandler* dhnd;
89     PHStroke stroke;
90     PHClip clipMode;
91     void* pData;
92 } ProcessHandler;
93 
94 
95 jboolean doDrawPath(DrawHandler* hnd,
96                     void (*pProcessEndSubPath)(ProcessHandler* hnd),
97                     jint transX, jint transY,
98                     jfloat* coords, jint maxCoords,
99                     jbyte* types, jint numTypes,
100                     PHStroke stroke);
101 
102 jboolean doFillPath(DrawHandler* hnd,
103                     jint transX, jint transY,
104                     jfloat* coords, jint maxCoords,
105                     jbyte* types, jint numTypes,
106                     PHStroke stroke,
107                     jint fillRule);
108 
109 #endif
110