1 /*
2 * Copyright (c) 2008, 2010, 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 #include "math.h"
27 #include "GraphicsPrimitiveMgr.h"
28 #include "ParallelogramUtils.h"
29
30 #include "sun_java2d_loops_FillParallelogram.h"
31
32 /*
33 * Class: sun_java2d_loops_FillParallelogram
34 * Method: FillParallelogram
35 * Signature: (Lsun/java2d/SunGraphics2D;Lsun/java2d/SurfaceData;DDDDDD)V
36 */
37 JNIEXPORT void JNICALL
38 Java_sun_java2d_loops_FillParallelogram_FillParallelogram
39 (JNIEnv *env, jobject self,
40 jobject sg2d, jobject sData,
41 jdouble x0, jdouble y0,
42 jdouble dx1, jdouble dy1,
43 jdouble dx2, jdouble dy2)
44 {
45 SurfaceDataOps *sdOps;
46 SurfaceDataRasInfo rasInfo;
47 NativePrimitive *pPrim;
48 CompositeInfo compInfo;
49 jint pixel;
50 jint ix1, iy1, ix2, iy2;
51 if ((dy1 == 0 && dx1 == 0) || (dy2 == 0 && dx2 == 0)) {
52 return;
53 }
54
55 /*
56 * Sort parallelogram by y values, ensure that each delta vector
57 * has a non-negative y delta.
58 */
59 SORT_PGRAM(x0, y0, dx1, dy1, dx2, dy2, );
60
61 PGRAM_MIN_MAX(ix1, ix2, x0, dx1, dx2, JNI_FALSE);
62 iy1 = (jint) floor(y0 + 0.5);
63 iy2 = (jint) floor(y0 + dy1 + dy2 + 0.5);
64
65 pPrim = GetNativePrim(env, self);
66 if (pPrim == NULL) {
67 return;
68 }
69 pixel = GrPrim_Sg2dGetPixel(env, sg2d);
70 if (pPrim->pCompType->getCompInfo != NULL) {
71 GrPrim_Sg2dGetCompInfo(env, sg2d, pPrim, &compInfo);
72 }
73
74 sdOps = SurfaceData_GetOps(env, sData);
75 if (sdOps == NULL) {
76 return;
77 }
78
79 GrPrim_Sg2dGetClip(env, sg2d, &rasInfo.bounds);
80 SurfaceData_IntersectBoundsXYXY(&rasInfo.bounds, ix1, iy1, ix2, iy2);
81 if (rasInfo.bounds.y2 <= rasInfo.bounds.y1 ||
82 rasInfo.bounds.x2 <= rasInfo.bounds.x1)
83 {
84 return;
85 }
86
87 if (sdOps->Lock(env, sdOps, &rasInfo, pPrim->dstflags) != SD_SUCCESS) {
88 return;
89 }
90
91 ix1 = rasInfo.bounds.x1;
92 iy1 = rasInfo.bounds.y1;
93 ix2 = rasInfo.bounds.x2;
94 iy2 = rasInfo.bounds.y2;
95 if (ix2 > ix1 && iy2 > iy1) {
96 sdOps->GetRasInfo(env, sdOps, &rasInfo);
97 if (rasInfo.rasBase) {
98 jdouble lslope = (dy1 == 0) ? 0 : dx1 / dy1;
99 jdouble rslope = (dy2 == 0) ? 0 : dx2 / dy2;
100 jlong ldx = DblToLong(lslope);
101 jlong rdx = DblToLong(rslope);
102 jint cy1, cy2, loy, hiy;
103 dx1 += x0;
104 dy1 += y0;
105 dx2 += x0;
106 dy2 += y0;
107 cy1 = (jint) floor(dy1 + 0.5);
108 cy2 = (jint) floor(dy2 + 0.5);
109
110 /* Top triangular portion. */
111 loy = iy1;
112 hiy = (cy1 < cy2) ? cy1 : cy2;
113 if (hiy > iy2) hiy = iy2;
114 if (loy < hiy) {
115 jlong lx = PGRAM_INIT_X(loy, x0, y0, lslope);
116 jlong rx = PGRAM_INIT_X(loy, x0, y0, rslope);
117 (*pPrim->funcs.fillparallelogram)(&rasInfo,
118 ix1, loy, ix2, hiy,
119 lx, ldx, rx, rdx,
120 pixel, pPrim, &compInfo);
121 }
122
123 /* Middle parallelogram portion, which way does it slant? */
124 if (cy1 < cy2) {
125 /* Middle parallelogram portion, slanted to right. */
126 /* left leg turned a corner at y0+dy1 */
127 /* right leg continuing on its initial trajectory from y0 */
128 loy = cy1;
129 hiy = cy2;
130 if (loy < iy1) loy = iy1;
131 if (hiy > iy2) hiy = iy2;
132 if (loy < hiy) {
133 jlong lx = PGRAM_INIT_X(loy, dx1, dy1, rslope);
134 jlong rx = PGRAM_INIT_X(loy, x0, y0, rslope);
135 (*pPrim->funcs.fillparallelogram)(&rasInfo,
136 ix1, loy, ix2, hiy,
137 lx, rdx, rx, rdx,
138 pixel, pPrim, &compInfo);
139 }
140 } else if (cy2 < cy1) {
141 /* Middle parallelogram portion, slanted to left. */
142 /* left leg continuing on its initial trajectory from y0 */
143 /* right leg turned a corner at y0+dy2 */
144 loy = cy2;
145 hiy = cy1;
146 if (loy < iy1) loy = iy1;
147 if (hiy > iy2) hiy = iy2;
148 if (loy < hiy) {
149 jlong lx = PGRAM_INIT_X(loy, x0, y0, lslope);
150 jlong rx = PGRAM_INIT_X(loy, dx2, dy2, lslope);
151 (*pPrim->funcs.fillparallelogram)(&rasInfo,
152 ix1, loy, ix2, hiy,
153 lx, ldx, rx, ldx,
154 pixel, pPrim, &compInfo);
155 }
156 }
157
158 /* Bottom triangular portion. */
159 loy = (cy1 > cy2) ? cy1 : cy2;
160 if (loy < iy1) loy = iy1;
161 hiy = iy2;
162 if (loy < hiy) {
163 /* left leg turned its corner at y0+dy1, now moving right */
164 /* right leg turned its corner at y0+dy2, now moving left */
165 jlong lx = PGRAM_INIT_X(loy, dx1, dy1, rslope);
166 jlong rx = PGRAM_INIT_X(loy, dx2, dy2, lslope);
167 (*pPrim->funcs.fillparallelogram)(&rasInfo,
168 ix1, loy, ix2, hiy,
169 lx, rdx, rx, ldx,
170 pixel, pPrim, &compInfo);
171 }
172 }
173 SurfaceData_InvokeRelease(env, sdOps, &rasInfo);
174 }
175 SurfaceData_InvokeUnlock(env, sdOps, &rasInfo);
176 }