1 /*
   2  * Copyright (c) 2005, 2018, 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
   6  * under the terms of the GNU General Public License version 2 only, as
   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.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  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 JNIEXPORT jboolean JNICALL
  96 doDrawPath(DrawHandler* hnd,
  97            void (*pProcessEndSubPath)(ProcessHandler* hnd),
  98            jint transX, jint transY,
  99            jfloat* coords, jint maxCoords,
 100            jbyte* types, jint numTypes,
 101            PHStroke stroke);
 102 
 103 JNIEXPORT jboolean JNICALL
 104 doFillPath(DrawHandler* hnd,
 105            jint transX, jint transY,
 106            jfloat* coords, jint maxCoords,
 107            jbyte* types, jint numTypes,
 108            PHStroke stroke,
 109            jint fillRule);
 110 
 111 #endif