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