1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "SkRegion.h" 18 #include "SkPath.h" 19 #include "GraphicsJNI.h" 20 21 #include <binder/Parcel.h> 22 #include "android_util_Binder.h" 23 24 #include <jni.h> 25 #include <android_runtime/AndroidRuntime.h> 26 27 namespace android { 28 29 static jfieldID gRegion_nativeInstanceFieldID; 30 31 static inline SkRegion* GetSkRegion(JNIEnv* env, jobject regionObject) { 32 SkRegion* rgn = (SkRegion*)env->GetIntField(regionObject, gRegion_nativeInstanceFieldID); 33 SkASSERT(rgn != NULL); 34 return rgn; 35 } 36 37 static SkRegion* Region_constructor(JNIEnv* env, jobject) { 38 return new SkRegion; 39 } 40 41 static void Region_destructor(JNIEnv* env, jobject, SkRegion* region) { 42 SkASSERT(region); 43 delete region; 44 } 45 46 static void Region_setRegion(JNIEnv* env, jobject, SkRegion* dst, const SkRegion* src) { 47 SkASSERT(dst && src); 48 *dst = *src; 49 } 50 51 static jboolean Region_setRect(JNIEnv* env, jobject, SkRegion* dst, int left, int top, int right, int bottom) { 52 return dst->setRect(left, top, right, bottom); 53 } 54 55 static jboolean Region_setPath(JNIEnv* env, jobject, SkRegion* dst, 56 const SkPath* path, const SkRegion* clip) { 57 SkASSERT(dst && path && clip); 58 return dst->setPath(*path, *clip); 59 } 60 61 static jboolean Region_getBounds(JNIEnv* env, jobject, SkRegion* region, jobject rectBounds) { 62 GraphicsJNI::irect_to_jrect(region->getBounds(), env, rectBounds); 63 return !region->isEmpty(); 64 } 65 66 static jboolean Region_getBoundaryPath(JNIEnv* env, jobject, const SkRegion* region, SkPath* path) { 67 return region->getBoundaryPath(path); 68 } 69 70 static jboolean Region_op0(JNIEnv* env, jobject, SkRegion* dst, int left, int top, int right, int bottom, int op) { 71 SkIRect ir; 72 73 ir.set(left, top, right, bottom); 74 return dst->op(ir, (SkRegion::Op)op); 75 } 76 77 static jboolean Region_op1(JNIEnv* env, jobject, SkRegion* dst, jobject rectObject, const SkRegion* region, int op) { 78 SkIRect ir; 79 GraphicsJNI::jrect_to_irect(env, rectObject, &ir); 80 return dst->op(ir, *region, (SkRegion::Op)op); 81 } 82 83 static jboolean Region_op2(JNIEnv* env, jobject, SkRegion* dst, const SkRegion* region1, const SkRegion* region2, int op) { 84 return dst->op(*region1, *region2, (SkRegion::Op)op); 85 } 86 87 //////////////////////////////////// These are methods, not static 88 89 static jboolean Region_isEmpty(JNIEnv* env, jobject region) { 90 return GetSkRegion(env, region)->isEmpty(); 91 } 92 93 static jboolean Region_isRect(JNIEnv* env, jobject region) { 94 return GetSkRegion(env, region)->isRect(); 95 } 96 97 static jboolean Region_isComplex(JNIEnv* env, jobject region) { 98 return GetSkRegion(env, region)->isComplex(); 99 } 100 101 static jboolean Region_contains(JNIEnv* env, jobject region, int x, int y) { 102 return GetSkRegion(env, region)->contains(x, y); 103 } 104 105 static jboolean Region_quickContains(JNIEnv* env, jobject region, int left, int top, int right, int bottom) { 106 return GetSkRegion(env, region)->quickContains(left, top, right, bottom); 107 } 108 109 static jboolean Region_quickRejectIIII(JNIEnv* env, jobject region, int left, int top, int right, int bottom) { 110 SkIRect ir; 111 ir.set(left, top, right, bottom); 112 return GetSkRegion(env, region)->quickReject(ir); 113 } 114 115 static jboolean Region_quickRejectRgn(JNIEnv* env, jobject region, jobject other) { 116 return GetSkRegion(env, region)->quickReject(*GetSkRegion(env, other)); 117 } 118 119 static void Region_translate(JNIEnv* env, jobject region, int x, int y, jobject dst) { 120 SkRegion* rgn = GetSkRegion(env, region); 121 if (dst) 122 rgn->translate(x, y, GetSkRegion(env, dst)); 123 else 124 rgn->translate(x, y); 125 } 126 127 // Scale the rectangle by given scale and set the reuslt to the dst. 128 static void scale_rect(SkIRect* dst, const SkIRect& src, float scale) { 129 dst->fLeft = (int)::roundf(src.fLeft * scale); 130 dst->fTop = (int)::roundf(src.fTop * scale); 131 dst->fRight = (int)::roundf(src.fRight * scale); 132 dst->fBottom = (int)::roundf(src.fBottom * scale); 133 } 134 135 // Scale the region by given scale and set the reuslt to the dst. 136 // dest and src can be the same region instance. 137 static void scale_rgn(SkRegion* dst, const SkRegion& src, float scale) { 138 SkRegion tmp; 139 SkRegion::Iterator iter(src); 140 141 for (; !iter.done(); iter.next()) { 142 SkIRect r; 143 scale_rect(&r, iter.rect(), scale); 144 tmp.op(r, SkRegion::kUnion_Op); 145 } 146 dst->swap(tmp); 147 } 148 149 static void Region_scale(JNIEnv* env, jobject region, jfloat scale, jobject dst) { 150 SkRegion* rgn = GetSkRegion(env, region); 151 if (dst) 152 scale_rgn(GetSkRegion(env, dst), *rgn, scale); 153 else 154 scale_rgn(rgn, *rgn, scale); 155 } 156 157 static jstring Region_toString(JNIEnv* env, jobject clazz, SkRegion* region) { 158 char* str = region->toString(); 159 if (str == NULL) { 160 return NULL; 161 } 162 jstring result = env->NewStringUTF(str); 163 free(str); 164 return result; 165 } 166 167 //////////////////////////////////////////////////////////////////////////////////////////////////////////// 168 169 static SkRegion* Region_createFromParcel(JNIEnv* env, jobject clazz, jobject parcel) 170 { 171 if (parcel == NULL) { 172 return NULL; 173 } 174 175 android::Parcel* p = android::parcelForJavaObject(env, parcel); 176 177 SkRegion* region = new SkRegion; 178 size_t size = p->readInt32(); 179 region->unflatten(p->readInplace(size)); 180 181 return region; 182 } 183 184 static jboolean Region_writeToParcel(JNIEnv* env, jobject clazz, const SkRegion* region, jobject parcel) 185 { 186 if (parcel == NULL) { 187 return false; 188 } 189 190 android::Parcel* p = android::parcelForJavaObject(env, parcel); 191 192 size_t size = region->flatten(NULL); 193 p->writeInt32(size); 194 region->flatten(p->writeInplace(size)); 195 196 return true; 197 } 198 199 //////////////////////////////////////////////////////////////////////////////////////////////////////////// 200 201 static jboolean Region_equals(JNIEnv* env, jobject clazz, const SkRegion *r1, const SkRegion* r2) 202 { 203 return (jboolean) (*r1 == *r2); 204 } 205 206 //////////////////////////////////////////////////////////////////////////////////////////////////////////// 207 208 struct RgnIterPair { 209 SkRegion fRgn; // a copy of the caller's region 210 SkRegion::Iterator fIter; // an iterator acting upon the copy (fRgn) 211 212 RgnIterPair(const SkRegion& rgn) : fRgn(rgn) { 213 // have our iterator reference our copy (fRgn), so we know it will be 214 // unchanged for the lifetime of the iterator 215 fIter.reset(fRgn); 216 } 217 }; 218 219 static RgnIterPair* RegionIter_constructor(JNIEnv* env, jobject, const SkRegion* region) 220 { 221 SkASSERT(region); 222 return new RgnIterPair(*region); 223 } 224 225 static void RegionIter_destructor(JNIEnv* env, jobject, RgnIterPair* pair) 226 { 227 SkASSERT(pair); 228 delete pair; 229 } 230 231 static jboolean RegionIter_next(JNIEnv* env, jobject, RgnIterPair* pair, jobject rectObject) 232 { 233 // the caller has checked that rectObject is not nul 234 SkASSERT(pair); 235 SkASSERT(rectObject); 236 237 if (!pair->fIter.done()) { 238 GraphicsJNI::irect_to_jrect(pair->fIter.rect(), env, rectObject); 239 pair->fIter.next(); 240 return true; 241 } 242 return false; 243 } 244 245 //////////////////////////////////////////////////////////////////////////////////////////////////////////// 246 247 static JNINativeMethod gRegionIterMethods[] = { 248 { "nativeConstructor", "(I)I", (void*)RegionIter_constructor }, 249 { "nativeDestructor", "(I)V", (void*)RegionIter_destructor }, 250 { "nativeNext", "(ILandroid/graphics/Rect;)Z", (void*)RegionIter_next } 251 }; 252 253 static JNINativeMethod gRegionMethods[] = { 254 // these are static methods 255 { "nativeConstructor", "()I", (void*)Region_constructor }, 256 { "nativeDestructor", "(I)V", (void*)Region_destructor }, 257 { "nativeSetRegion", "(II)Z", (void*)Region_setRegion }, 258 { "nativeSetRect", "(IIIII)Z", (void*)Region_setRect }, 259 { "nativeSetPath", "(III)Z", (void*)Region_setPath }, 260 { "nativeGetBounds", "(ILandroid/graphics/Rect;)Z", (void*)Region_getBounds }, 261 { "nativeGetBoundaryPath", "(II)Z", (void*)Region_getBoundaryPath }, 262 { "nativeOp", "(IIIIII)Z", (void*)Region_op0 }, 263 { "nativeOp", "(ILandroid/graphics/Rect;II)Z", (void*)Region_op1 }, 264 { "nativeOp", "(IIII)Z", (void*)Region_op2 }, 265 // these are methods that take the java region object 266 { "isEmpty", "()Z", (void*)Region_isEmpty }, 267 { "isRect", "()Z", (void*)Region_isRect }, 268 { "isComplex", "()Z", (void*)Region_isComplex }, 269 { "contains", "(II)Z", (void*)Region_contains }, 270 { "quickContains", "(IIII)Z", (void*)Region_quickContains }, 271 { "quickReject", "(IIII)Z", (void*)Region_quickRejectIIII }, 272 { "quickReject", "(Landroid/graphics/Region;)Z", (void*)Region_quickRejectRgn }, 273 { "scale", "(FLandroid/graphics/Region;)V", (void*)Region_scale }, 274 { "translate", "(IILandroid/graphics/Region;)V", (void*)Region_translate }, 275 { "nativeToString", "(I)Ljava/lang/String;", (void*)Region_toString }, 276 // parceling methods 277 { "nativeCreateFromParcel", "(Landroid/os/Parcel;)I", (void*)Region_createFromParcel }, 278 { "nativeWriteToParcel", "(ILandroid/os/Parcel;)Z", (void*)Region_writeToParcel }, 279 { "nativeEquals", "(II)Z", (void*)Region_equals }, 280 }; 281 282 int register_android_graphics_Region(JNIEnv* env) 283 { 284 jclass clazz = env->FindClass("android/graphics/Region"); 285 SkASSERT(clazz); 286 287 gRegion_nativeInstanceFieldID = env->GetFieldID(clazz, "mNativeRegion", "I"); 288 SkASSERT(gRegion_nativeInstanceFieldID); 289 290 int result = android::AndroidRuntime::registerNativeMethods(env, "android/graphics/Region", 291 gRegionMethods, SK_ARRAY_COUNT(gRegionMethods)); 292 if (result < 0) 293 return result; 294 295 return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/RegionIterator", 296 gRegionIterMethods, SK_ARRAY_COUNT(gRegionIterMethods)); 297 } 298 299 SkRegion* android_graphics_Region_getSkRegion(JNIEnv* env, jobject regionObj) { 300 return GetSkRegion(env, regionObj); 301 } 302 303 } // namespace android 304
