1 #ifndef GraphicsJNI_DEFINED 2 #define GraphicsJNI_DEFINED 3 4 #include "SkBitmap.h" 5 #include "SkDevice.h" 6 #include "SkPixelRef.h" 7 #include "SkMallocPixelRef.h" 8 #include "SkPoint.h" 9 #include "SkRect.h" 10 #include "SkImageDecoder.h" 11 #include <jni.h> 12 13 class SkBitmapRegionDecoder; 14 class SkCanvas; 15 class SkPaint; 16 class SkPicture; 17 18 class GraphicsJNI { 19 public: 20 enum BitmapCreateFlags { 21 kBitmapCreateFlag_None = 0x0, 22 kBitmapCreateFlag_Mutable = 0x1, 23 kBitmapCreateFlag_Premultiplied = 0x2, 24 }; 25 26 // returns true if an exception is set (and dumps it out to the Log) 27 static bool hasException(JNIEnv*); 28 29 static void get_jrect(JNIEnv*, jobject jrect, int* L, int* T, int* R, int* B); 30 static void set_jrect(JNIEnv*, jobject jrect, int L, int T, int R, int B); 31 32 static SkIRect* jrect_to_irect(JNIEnv*, jobject jrect, SkIRect*); 33 static void irect_to_jrect(const SkIRect&, JNIEnv*, jobject jrect); 34 35 static SkRect* jrectf_to_rect(JNIEnv*, jobject jrectf, SkRect*); 36 static SkRect* jrect_to_rect(JNIEnv*, jobject jrect, SkRect*); 37 static void rect_to_jrectf(const SkRect&, JNIEnv*, jobject jrectf); 38 39 static void set_jpoint(JNIEnv*, jobject jrect, int x, int y); 40 41 static SkIPoint* jpoint_to_ipoint(JNIEnv*, jobject jpoint, SkIPoint* point); 42 static void ipoint_to_jpoint(const SkIPoint& point, JNIEnv*, jobject jpoint); 43 44 static SkPoint* jpointf_to_point(JNIEnv*, jobject jpointf, SkPoint* point); 45 static void point_to_jpointf(const SkPoint& point, JNIEnv*, jobject jpointf); 46 47 static SkCanvas* getNativeCanvas(JNIEnv*, jobject canvas); 48 static SkPaint* getNativePaint(JNIEnv*, jobject paint); 49 static SkBitmap* getNativeBitmap(JNIEnv*, jobject bitmap); 50 static SkPicture* getNativePicture(JNIEnv*, jobject picture); 51 static SkRegion* getNativeRegion(JNIEnv*, jobject region); 52 53 /** Return the corresponding native config from the java Config enum, 54 or kNo_Config if the java object is null. 55 */ 56 static SkBitmap::Config getNativeBitmapConfig(JNIEnv*, jobject jconfig); 57 58 /** Create a java Bitmap object given the native bitmap (required) and optional 59 storage array (may be null). 60 */ 61 static jobject createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer, 62 int bitmapCreateFlags, jbyteArray ninepatch, jintArray layoutbounds, int density = -1); 63 64 static jobject createBitmap(JNIEnv* env, SkBitmap* bitmap, int bitmapCreateFlags, 65 jbyteArray ninepatch, int density = -1); 66 67 static void reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap, 68 bool isPremultiplied); 69 70 static int getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap); 71 72 static jobject createRegion(JNIEnv* env, SkRegion* region); 73 74 static jobject createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap); 75 76 static jbyteArray allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap, 77 SkColorTable* ctable); 78 79 /** Copy the colors in colors[] to the bitmap, convert to the correct 80 format along the way. 81 */ 82 static bool SetPixels(JNIEnv* env, jintArray colors, int srcOffset, 83 int srcStride, int x, int y, int width, int height, 84 const SkBitmap& dstBitmap, bool isPremultiplied); 85 86 static jbyteArray getBitmapStorageObj(SkPixelRef *pixref); 87 }; 88 89 class AndroidPixelRef : public SkMallocPixelRef { 90 public: 91 AndroidPixelRef(JNIEnv* env, void* storage, size_t size, jbyteArray storageObj, 92 SkColorTable* ctable); 93 94 /** 95 * Creates an AndroidPixelRef that wraps (and refs) another to reuse/share 96 * the same storage and java byte array refcounting, yet have a different 97 * color table. 98 */ 99 AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, SkColorTable* ctable); 100 101 virtual ~AndroidPixelRef(); 102 103 jbyteArray getStorageObj(); 104 105 void setLocalJNIRef(jbyteArray arr); 106 107 /** Used to hold a ref to the pixels when the Java bitmap may be collected. 108 * If specified, 'localref' is a valid JNI local reference to the byte array 109 * containing the pixel data. 110 * 111 * 'localref' may only be NULL if setLocalJNIRef() was already called with 112 * a JNI local ref that is still valid. 113 */ 114 virtual void globalRef(void* localref=NULL); 115 116 /** Release a ref that was acquired using globalRef(). */ 117 virtual void globalUnref(); 118 119 private: 120 AndroidPixelRef* const fWrappedPixelRef; // if set, delegate memory management calls to this 121 122 JavaVM* fVM; 123 bool fOnJavaHeap; // If true, the memory was allocated on the Java heap 124 125 jbyteArray fStorageObj; // The Java byte[] object used as the bitmap backing store 126 bool fHasGlobalRef; // If true, fStorageObj holds a JNI global ref 127 128 mutable int32_t fGlobalRefCnt; 129 }; 130 131 /** A helper class for accessing Java-heap-allocated bitmaps. 132 * This should be used when calling into a JNI method that retains a 133 * reference to the bitmap longer than the lifetime of the Java Bitmap. 134 * 135 * After creating an instance of this class, a call to 136 * AndroidPixelRef::globalRef() will allocate a JNI global reference 137 * to the backing buffer object. 138 */ 139 class JavaHeapBitmapRef { 140 public: 141 142 JavaHeapBitmapRef(JNIEnv *env, SkBitmap* nativeBitmap, jbyteArray buffer); 143 ~JavaHeapBitmapRef(); 144 145 private: 146 JNIEnv* fEnv; 147 SkBitmap* fNativeBitmap; 148 jbyteArray fBuffer; 149 }; 150 151 /** Allocator which allocates the backing buffer in the Java heap. 152 * Instances can only be used to perform a single allocation, which helps 153 * ensure that the allocated buffer is properly accounted for with a 154 * reference in the heap (or a JNI global reference). 155 */ 156 class JavaPixelAllocator : public SkBitmap::Allocator { 157 public: 158 JavaPixelAllocator(JNIEnv* env); 159 // overrides 160 virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable); 161 162 /** Return the Java array object created for the last allocation. 163 * This returns a local JNI reference which the caller is responsible 164 * for storing appropriately (usually by passing it to the Bitmap 165 * constructor). 166 */ 167 jbyteArray getStorageObj() { return fStorageObj; } 168 169 /** Same as getStorageObj(), but also resets the allocator so that it 170 * can allocate again. 171 */ 172 jbyteArray getStorageObjAndReset() { 173 jbyteArray result = fStorageObj; 174 fStorageObj = NULL; 175 fAllocCount = 0; 176 return result; 177 }; 178 179 private: 180 JavaVM* fVM; 181 bool fAllocateInJavaHeap; 182 jbyteArray fStorageObj; 183 int fAllocCount; 184 }; 185 186 enum JNIAccess { 187 kRO_JNIAccess, 188 kRW_JNIAccess 189 }; 190 191 class AutoJavaFloatArray { 192 public: 193 AutoJavaFloatArray(JNIEnv* env, jfloatArray array, 194 int minLength = 0, JNIAccess = kRW_JNIAccess); 195 ~AutoJavaFloatArray(); 196 197 float* ptr() const { return fPtr; } 198 int length() const { return fLen; } 199 200 private: 201 JNIEnv* fEnv; 202 jfloatArray fArray; 203 float* fPtr; 204 int fLen; 205 int fReleaseMode; 206 }; 207 208 class AutoJavaIntArray { 209 public: 210 AutoJavaIntArray(JNIEnv* env, jintArray array, int minLength = 0); 211 ~AutoJavaIntArray(); 212 213 jint* ptr() const { return fPtr; } 214 int length() const { return fLen; } 215 216 private: 217 JNIEnv* fEnv; 218 jintArray fArray; 219 jint* fPtr; 220 int fLen; 221 }; 222 223 class AutoJavaShortArray { 224 public: 225 AutoJavaShortArray(JNIEnv* env, jshortArray array, 226 int minLength = 0, JNIAccess = kRW_JNIAccess); 227 ~AutoJavaShortArray(); 228 229 jshort* ptr() const { return fPtr; } 230 int length() const { return fLen; } 231 232 private: 233 JNIEnv* fEnv; 234 jshortArray fArray; 235 jshort* fPtr; 236 int fLen; 237 int fReleaseMode; 238 }; 239 240 class AutoJavaByteArray { 241 public: 242 AutoJavaByteArray(JNIEnv* env, jbyteArray array, int minLength = 0); 243 ~AutoJavaByteArray(); 244 245 jbyte* ptr() const { return fPtr; } 246 int length() const { return fLen; } 247 248 private: 249 JNIEnv* fEnv; 250 jbyteArray fArray; 251 jbyte* fPtr; 252 int fLen; 253 }; 254 255 void doThrowNPE(JNIEnv* env); 256 void doThrowAIOOBE(JNIEnv* env); // Array Index Out Of Bounds Exception 257 void doThrowIAE(JNIEnv* env, const char* msg = NULL); // Illegal Argument 258 void doThrowRE(JNIEnv* env, const char* msg = NULL); // Runtime 259 void doThrowISE(JNIEnv* env, const char* msg = NULL); // Illegal State 260 void doThrowOOME(JNIEnv* env, const char* msg = NULL); // Out of memory 261 void doThrowIOE(JNIEnv* env, const char* msg = NULL); // IO Exception 262 263 #define NPE_CHECK_RETURN_ZERO(env, object) \ 264 do { if (NULL == (object)) { doThrowNPE(env); return 0; } } while (0) 265 266 #define NPE_CHECK_RETURN_VOID(env, object) \ 267 do { if (NULL == (object)) { doThrowNPE(env); return; } } while (0) 268 269 #endif 270
