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
52 if ((dy1 == 0 && dx1 == 0) || (dy2 == 0 && dx2 == 0)) {
53 return;
54 }
55
56 /*
57 * Sort parallelogram by y values, ensure that each delta vector
58 * has a non-negative y delta.
59 */
60 SORT_PGRAM(x0, y0, dx1, dy1, dx2, dy2, );
61
62 PGRAM_MIN_MAX(ix1, ix2, x0, dx1, dx2, JNI_FALSE);
63 iy1 = (jint) floor(y0 + 0.5);
64 iy2 = (jint) floor(y0 + dy1 + dy2 + 0.5);
65
66 pPrim = GetNativePrim(env, self);
67 if (pPrim == NULL) {
68 return;
69 }
70 pixel = GrPrim_Sg2dGetPixel(env, sg2d);
71 if (pPrim->pCompType->getCompInfo != NULL) {
72 GrPrim_Sg2dGetCompInfo(env, sg2d, pPrim, &compInfo);
73 }
74
75 sdOps = SurfaceData_GetOps(env, sData);
76 if (sdOps == NULL) {
77 return;
78 }
79
80 GrPrim_Sg2dGetClip(env, sg2d, &rasInfo.bounds);
81 SurfaceData_IntersectBoundsXYXY(&rasInfo.bounds, ix1, iy1, ix2, iy2);
82 if (rasInfo.bounds.y2 <= rasInfo.bounds.y1 ||
83 rasInfo.bounds.x2 <= rasInfo.bounds.x1)
84 {
85 return;
86 }
87
88 if (sdOps->Lock(env, sdOps, &rasInfo, pPrim->dstflags) != SD_SUCCESS) {
89 return;
90 }
91
92 ix1 = rasInfo.bounds.x1;
93 iy1 = rasInfo.bounds.y1;
94 ix2 = rasInfo.bounds.x2;
95 iy2 = rasInfo.bounds.y2;
96 if (ix2 > ix1 && iy2 > iy1) {
97 sdOps->GetRasInfo(env, sdOps, &rasInfo);
98 if (rasInfo.rasBase) {
99 jdouble lslope = (dy1 == 0) ? 0 : dx1 / dy1;
100 jdouble rslope = (dy2 == 0) ? 0 : dx2 / dy2;
101 jlong ldx = DblToLong(lslope);
102 jlong rdx = DblToLong(rslope);
103 jint cy1, cy2, loy, hiy;
104 dx1 += x0;
105 dy1 += y0;
106 dx2 += x0;
107 dy2 += y0;
108 cy1 = (jint) floor(dy1 + 0.5);
109 cy2 = (jint) floor(dy2 + 0.5);
110
111 /* Top triangular portion. */
112 loy = iy1;
113 hiy = (cy1 < cy2) ? cy1 : cy2;
114 if (hiy > iy2) hiy = iy2;
115 if (loy < hiy) {
116 jlong lx = PGRAM_INIT_X(loy, x0, y0, lslope);
117 jlong rx = PGRAM_INIT_X(loy, x0, y0, rslope);
118 (*pPrim->funcs.fillparallelogram)(&rasInfo,
119 ix1, loy, ix2, hiy,
120 lx, ldx, rx, rdx,
121 pixel, pPrim, &compInfo);
122 }
123
124 /* Middle parallelogram portion, which way does it slant? */
125 if (cy1 < cy2) {
126 /* Middle parallelogram portion, slanted to right. */
127 /* left leg turned a corner at y0+dy1 */
128 /* right leg continuing on its initial trajectory from y0 */
129 loy = cy1;
130 hiy = cy2;
131 if (loy < iy1) loy = iy1;
132 if (hiy > iy2) hiy = iy2;
133 if (loy < hiy) {
134 jlong lx = PGRAM_INIT_X(loy, dx1, dy1, rslope);
135 jlong rx = PGRAM_INIT_X(loy, x0, y0, rslope);
136 (*pPrim->funcs.fillparallelogram)(&rasInfo,
137 ix1, loy, ix2, hiy,
138 lx, rdx, rx, rdx,
139 pixel, pPrim, &compInfo);
140 }
141 } else if (cy2 < cy1) {
142 /* Middle parallelogram portion, slanted to left. */
143 /* left leg continuing on its initial trajectory from y0 */
144 /* right leg turned a corner at y0+dy2 */
145 loy = cy2;
146 hiy = cy1;
147 if (loy < iy1) loy = iy1;
148 if (hiy > iy2) hiy = iy2;
149 if (loy < hiy) {
150 jlong lx = PGRAM_INIT_X(loy, x0, y0, lslope);
151 jlong rx = PGRAM_INIT_X(loy, dx2, dy2, lslope);
152 (*pPrim->funcs.fillparallelogram)(&rasInfo,
153 ix1, loy, ix2, hiy,
154 lx, ldx, rx, ldx,
155 pixel, pPrim, &compInfo);
156 }
157 }
158
159 /* Bottom triangular portion. */
160 loy = (cy1 > cy2) ? cy1 : cy2;
161 if (loy < iy1) loy = iy1;
162 hiy = iy2;
163 if (loy < hiy) {
164 /* left leg turned its corner at y0+dy1, now moving right */
165 /* right leg turned its corner at y0+dy2, now moving left */
166 jlong lx = PGRAM_INIT_X(loy, dx1, dy1, rslope);
167 jlong rx = PGRAM_INIT_X(loy, dx2, dy2, lslope);
168 (*pPrim->funcs.fillparallelogram)(&rasInfo,
169 ix1, loy, ix2, hiy,
170 lx, rdx, rx, ldx,
171 pixel, pPrim, &compInfo);
172 }
173 }
174 SurfaceData_InvokeRelease(env, sdOps, &rasInfo);
175 }
176 SurfaceData_InvokeUnlock(env, sdOps, &rasInfo);
177 }