J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2000 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <math.h> |
| 29 | |
| 30 | #include "jni.h" |
| 31 | #include "jni_util.h" |
| 32 | |
| 33 | #include "sun_java2d_pipe_SpanClipRenderer.h" |
| 34 | #include "sun_java2d_pipe_RegionIterator.h" |
| 35 | |
| 36 | jfieldID pBandsArrayID; |
| 37 | jfieldID pEndIndexID; |
| 38 | jfieldID pRegionID; |
| 39 | jfieldID pCurIndexID; |
| 40 | jfieldID pNumXbandsID; |
| 41 | |
| 42 | JNIEXPORT void JNICALL |
| 43 | Java_sun_java2d_pipe_SpanClipRenderer_initIDs |
| 44 | (JNIEnv *env, jclass src, jclass rc, jclass ric) |
| 45 | { |
| 46 | /* Region fields */ |
| 47 | pBandsArrayID = (*env)->GetFieldID(env, rc, "bands", "[I"); |
| 48 | pEndIndexID = (*env)->GetFieldID(env, rc, "endIndex", "I"); |
| 49 | |
| 50 | /* RegionIterator fields */ |
| 51 | pRegionID = (*env)->GetFieldID(env, ric, "region", |
| 52 | "Lsun/java2d/pipe/Region;"); |
| 53 | pCurIndexID = (*env)->GetFieldID(env, ric, "curIndex", "I"); |
| 54 | pNumXbandsID = (*env)->GetFieldID(env, ric, "numXbands", "I"); |
| 55 | |
| 56 | if((pBandsArrayID == NULL) |
| 57 | || (pEndIndexID == NULL) |
| 58 | || (pRegionID == NULL) |
| 59 | || (pCurIndexID == NULL) |
| 60 | || (pNumXbandsID == NULL)) |
| 61 | { |
| 62 | JNU_ThrowInternalError(env, "NULL field ID"); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | static void |
| 67 | fill(jbyte *alpha, jint offset, jint tsize, |
| 68 | jint x, jint y, jint w, jint h, jbyte value) |
| 69 | { |
| 70 | alpha += offset + y * tsize + x; |
| 71 | tsize -= w; |
| 72 | while (--h >= 0) { |
| 73 | for (x = 0; x < w; x++) { |
| 74 | *alpha++ = value; |
| 75 | } |
| 76 | alpha += tsize; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static jboolean |
| 81 | nextYRange(jint *box, jint *bands, jint endIndex, |
| 82 | jint *pCurIndex, jint *pNumXbands) |
| 83 | { |
| 84 | jint curIndex = *pCurIndex; |
| 85 | jint numXbands = *pNumXbands; |
| 86 | jboolean ret; |
| 87 | |
| 88 | curIndex += numXbands * 2; |
| 89 | ret = (curIndex + 3 < endIndex); |
| 90 | if (ret) { |
| 91 | box[1] = bands[curIndex++]; |
| 92 | box[3] = bands[curIndex++]; |
| 93 | numXbands = bands[curIndex++]; |
| 94 | } else { |
| 95 | numXbands = 0; |
| 96 | } |
| 97 | *pCurIndex = curIndex; |
| 98 | *pNumXbands = numXbands; |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | static jboolean |
| 103 | nextXBand(jint *box, jint *bands, jint endIndex, |
| 104 | jint *pCurIndex, jint *pNumXbands) |
| 105 | { |
| 106 | jint curIndex = *pCurIndex; |
| 107 | jint numXbands = *pNumXbands; |
| 108 | |
| 109 | if (numXbands <= 0 || curIndex + 2 > endIndex) { |
| 110 | return JNI_FALSE; |
| 111 | } |
| 112 | numXbands--; |
| 113 | box[0] = bands[curIndex++]; |
| 114 | box[2] = bands[curIndex++]; |
| 115 | |
| 116 | *pCurIndex = curIndex; |
| 117 | *pNumXbands = numXbands; |
| 118 | return JNI_TRUE; |
| 119 | } |
| 120 | |
| 121 | JNIEXPORT void JNICALL |
| 122 | Java_sun_java2d_pipe_SpanClipRenderer_fillTile |
| 123 | (JNIEnv *env, jobject sr, jobject ri, |
| 124 | jbyteArray alphaTile, jint offset, jint tsize, jintArray boxArray) |
| 125 | { |
| 126 | jbyte *alpha; |
| 127 | jint *box; |
| 128 | jint w, h; |
| 129 | jsize alphalen; |
| 130 | |
| 131 | if ((*env)->GetArrayLength(env, boxArray) < 4) { |
| 132 | JNU_ThrowArrayIndexOutOfBoundsException(env, "band array"); |
| 133 | } |
| 134 | alphalen = (*env)->GetArrayLength(env, alphaTile); |
| 135 | |
| 136 | box = (*env)->GetPrimitiveArrayCritical(env, boxArray, 0); |
| 137 | |
| 138 | w = box[2] - box[0]; |
| 139 | h = box[3] - box[1]; |
| 140 | |
| 141 | if (alphalen < offset || (alphalen - offset) / tsize < h) { |
| 142 | (*env)->ReleasePrimitiveArrayCritical(env, boxArray, box, 0); |
| 143 | JNU_ThrowArrayIndexOutOfBoundsException(env, "alpha tile array"); |
| 144 | } |
| 145 | |
| 146 | alpha = (*env)->GetPrimitiveArrayCritical(env, alphaTile, 0); |
| 147 | |
| 148 | fill(alpha, offset, tsize, 0, 0, w, h, (jbyte) 0xff); |
| 149 | |
| 150 | (*env)->ReleasePrimitiveArrayCritical(env, alphaTile, alpha, 0); |
| 151 | (*env)->ReleasePrimitiveArrayCritical(env, boxArray, box, 0); |
| 152 | |
| 153 | Java_sun_java2d_pipe_SpanClipRenderer_eraseTile(env, sr, ri, |
| 154 | alphaTile, offset, tsize, |
| 155 | boxArray); |
| 156 | } |
| 157 | |
| 158 | JNIEXPORT void JNICALL |
| 159 | Java_sun_java2d_pipe_SpanClipRenderer_eraseTile |
| 160 | (JNIEnv *env, jobject sr, jobject ri, |
| 161 | jbyteArray alphaTile, jint offset, jint tsize, jintArray boxArray) |
| 162 | { |
| 163 | jobject region; |
| 164 | jintArray bandsArray; |
| 165 | jint *bands; |
| 166 | jbyte *alpha; |
| 167 | jint *box; |
| 168 | jint endIndex; |
| 169 | jint curIndex; |
| 170 | jint saveCurIndex; |
| 171 | jint numXbands; |
| 172 | jint saveNumXbands; |
| 173 | jint lox; |
| 174 | jint loy; |
| 175 | jint hix; |
| 176 | jint hiy; |
| 177 | jint firstx; |
| 178 | jint firsty; |
| 179 | jint lastx; |
| 180 | jint lasty; |
| 181 | jint curx; |
| 182 | jsize alphalen; |
| 183 | |
| 184 | if ((*env)->GetArrayLength(env, boxArray) < 4) { |
| 185 | JNU_ThrowArrayIndexOutOfBoundsException(env, "band array"); |
| 186 | } |
| 187 | alphalen = (*env)->GetArrayLength(env, alphaTile); |
| 188 | |
| 189 | saveCurIndex = (*env)->GetIntField(env, ri, pCurIndexID); |
| 190 | saveNumXbands = (*env)->GetIntField(env, ri, pNumXbandsID); |
| 191 | region = (*env)->GetObjectField(env, ri, pRegionID); |
| 192 | bandsArray = (*env)->GetObjectField(env, region, pBandsArrayID); |
| 193 | endIndex = (*env)->GetIntField(env, region, pEndIndexID); |
| 194 | |
| 195 | if (endIndex > (*env)->GetArrayLength(env, bandsArray)) { |
| 196 | endIndex = (*env)->GetArrayLength(env, bandsArray); |
| 197 | } |
| 198 | |
| 199 | box = (*env)->GetPrimitiveArrayCritical(env, boxArray, 0); |
| 200 | |
| 201 | lox = box[0]; |
| 202 | loy = box[1]; |
| 203 | hix = box[2]; |
| 204 | hiy = box[3]; |
| 205 | |
| 206 | if (alphalen < offset || |
| 207 | alphalen < offset + (hix-lox) || |
| 208 | (alphalen - offset - (hix-lox)) / tsize < (hiy - loy - 1)) { |
| 209 | (*env)->ReleasePrimitiveArrayCritical(env, boxArray, box, 0); |
| 210 | JNU_ThrowArrayIndexOutOfBoundsException(env, "alpha tile array"); |
| 211 | } |
| 212 | |
| 213 | bands = (*env)->GetPrimitiveArrayCritical(env, bandsArray, 0); |
| 214 | alpha = (*env)->GetPrimitiveArrayCritical(env, alphaTile, 0); |
| 215 | |
| 216 | curIndex = saveCurIndex; |
| 217 | numXbands = saveNumXbands; |
| 218 | firsty = hiy; |
| 219 | lasty = hiy; |
| 220 | firstx = hix; |
| 221 | lastx = lox; |
| 222 | |
| 223 | while (nextYRange(box, bands, endIndex, &curIndex, &numXbands)) { |
| 224 | if (box[3] <= loy) { |
| 225 | saveNumXbands = numXbands; |
| 226 | saveCurIndex = curIndex; |
| 227 | continue; |
| 228 | } |
| 229 | if (box[1] >= hiy) { |
| 230 | break; |
| 231 | } |
| 232 | if (box[1] < loy) { |
| 233 | box[1] = loy; |
| 234 | } |
| 235 | if (box[3] > hiy) { |
| 236 | box[3] = hiy; |
| 237 | } |
| 238 | curx = lox; |
| 239 | while (nextXBand(box, bands, endIndex, &curIndex, &numXbands)) { |
| 240 | if (box[2] <= lox) { |
| 241 | continue; |
| 242 | } |
| 243 | if (box[0] >= hix) { |
| 244 | break; |
| 245 | } |
| 246 | if (box[0] < lox) { |
| 247 | box[0] = lox; |
| 248 | } |
| 249 | if (lasty < box[1]) { |
| 250 | fill(alpha, offset, tsize, |
| 251 | 0, lasty - loy, |
| 252 | hix - lox, box[1] - lasty, 0); |
| 253 | } |
| 254 | lasty = box[3]; |
| 255 | if (firstx > box[0]) { |
| 256 | firstx = box[0]; |
| 257 | } |
| 258 | if (curx < box[0]) { |
| 259 | fill(alpha, offset, tsize, |
| 260 | curx - lox, box[1] - loy, |
| 261 | box[0] - curx, box[3] - box[1], 0); |
| 262 | } |
| 263 | curx = box[2]; |
| 264 | if (curx >= hix) { |
| 265 | curx = hix; |
| 266 | break; |
| 267 | } |
| 268 | } |
| 269 | if (curx > lox) { |
| 270 | if (curx < hix) { |
| 271 | fill(alpha, offset, tsize, |
| 272 | curx - lox, box[1] - loy, |
| 273 | hix - curx, box[3] - box[1], 0); |
| 274 | } |
| 275 | if (firsty > box[1]) { |
| 276 | firsty = box[1]; |
| 277 | } |
| 278 | } |
| 279 | if (lastx < curx) { |
| 280 | lastx = curx; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | box[0] = firstx; |
| 285 | box[1] = firsty; |
| 286 | box[2] = lastx; |
| 287 | box[3] = lasty; |
| 288 | |
| 289 | (*env)->ReleasePrimitiveArrayCritical(env, alphaTile, alpha, 0); |
| 290 | (*env)->ReleasePrimitiveArrayCritical(env, bandsArray, bands, 0); |
| 291 | (*env)->ReleasePrimitiveArrayCritical(env, boxArray, box, 0); |
| 292 | |
| 293 | (*env)->SetIntField(env, ri, pCurIndexID, saveCurIndex); |
| 294 | (*env)->SetIntField(env, ri, pNumXbandsID, saveNumXbands); |
| 295 | } |