1 #ifndef _ANDROID_GRAPHICS_GRAPHICS_JNI_H_
2 #define _ANDROID_GRAPHICS_GRAPHICS_JNI_H_
6 #include "SkPixelRef.h"
7 #include "SkMallocPixelRef.h"
10 #include "SkImageDecoder.h"
13 class SkBitmapRegionDecoder;
23 enum BitmapCreateFlags {
24 kBitmapCreateFlag_None = 0x0,
25 kBitmapCreateFlag_Mutable = 0x1,
26 kBitmapCreateFlag_Premultiplied = 0x2,
29 // returns true if an exception is set (and dumps it out to the Log)
30 static bool hasException(JNIEnv*);
32 static void get_jrect(JNIEnv*, jobject jrect, int* L, int* T, int* R, int* B);
33 static void set_jrect(JNIEnv*, jobject jrect, int L, int T, int R, int B);
35 static SkIRect* jrect_to_irect(JNIEnv*, jobject jrect, SkIRect*);
36 static void irect_to_jrect(const SkIRect&, JNIEnv*, jobject jrect);
38 static SkRect* jrectf_to_rect(JNIEnv*, jobject jrectf, SkRect*);
39 static SkRect* jrect_to_rect(JNIEnv*, jobject jrect, SkRect*);
40 static void rect_to_jrectf(const SkRect&, JNIEnv*, jobject jrectf);
42 static void set_jpoint(JNIEnv*, jobject jrect, int x, int y);
44 static SkIPoint* jpoint_to_ipoint(JNIEnv*, jobject jpoint, SkIPoint* point);
45 static void ipoint_to_jpoint(const SkIPoint& point, JNIEnv*, jobject jpoint);
47 static SkPoint* jpointf_to_point(JNIEnv*, jobject jpointf, SkPoint* point);
48 static void point_to_jpointf(const SkPoint& point, JNIEnv*, jobject jpointf);
50 static SkCanvas* getNativeCanvas(JNIEnv*, jobject canvas);
51 static android::Paint* getNativePaint(JNIEnv*, jobject paint);
52 static android::TypefaceImpl* getNativeTypeface(JNIEnv*, jobject paint);
53 static SkBitmap* getNativeBitmap(JNIEnv*, jobject bitmap);
54 static SkRegion* getNativeRegion(JNIEnv*, jobject region);
56 // Given the 'native' long held by the Rasterizer.java object, return a
57 // ref to its SkRasterizer* (or NULL).
58 static SkRasterizer* refNativeRasterizer(jlong rasterizerHandle);
61 * LegacyBitmapConfig is the old enum in Skia that matched the enum int values
62 * in Bitmap.Config. Skia no longer supports this config, but has replaced it
63 * with SkColorType. These routines convert between the two.
65 static SkColorType legacyBitmapConfigToColorType(jint legacyConfig);
66 static jint colorTypeToLegacyBitmapConfig(SkColorType colorType);
68 /** Return the corresponding native colorType from the java Config enum,
69 or kUnknown_SkColorType if the java object is null.
71 static SkColorType getNativeBitmapColorType(JNIEnv*, jobject jconfig);
73 /** Create a java Bitmap object given the native bitmap (required) and optional
74 storage array (may be null).
75 bitmap's SkAlphaType must already be in sync with bitmapCreateFlags.
77 static jobject createBitmap(JNIEnv* env, SkBitmap* bitmap, jbyteArray buffer,
78 int bitmapCreateFlags, jbyteArray ninePatch, jobject ninePatchInsets, int density = -1);
80 static jobject createBitmap(JNIEnv* env, SkBitmap* bitmap, int bitmapCreateFlags,
81 jbyteArray ninePatch, int density = -1) {
82 return createBitmap(env, bitmap, NULL, bitmapCreateFlags, ninePatch, NULL, density);
85 /** Reinitialize a bitmap. bitmap must already have its SkAlphaType set in
86 sync with isPremultiplied
88 static void reinitBitmap(JNIEnv* env, jobject javaBitmap, SkBitmap* bitmap,
89 bool isPremultiplied);
91 static int getBitmapAllocationByteCount(JNIEnv* env, jobject javaBitmap);
93 static jobject createRegion(JNIEnv* env, SkRegion* region);
95 static jobject createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap);
97 static jbyteArray allocateJavaPixelRef(JNIEnv* env, SkBitmap* bitmap,
98 SkColorTable* ctable);
100 /** Copy the colors in colors[] to the bitmap, convert to the correct
101 format along the way.
102 Whether to use premultiplied pixels is determined by dstBitmap's alphaType.
104 static bool SetPixels(JNIEnv* env, jintArray colors, int srcOffset,
105 int srcStride, int x, int y, int width, int height,
106 const SkBitmap& dstBitmap);
108 static jbyteArray getBitmapStorageObj(SkPixelRef *pixref);
111 class AndroidPixelRef : public SkMallocPixelRef {
113 AndroidPixelRef(JNIEnv* env, const SkImageInfo& info, void* storage, size_t rowBytes,
114 jbyteArray storageObj, SkColorTable* ctable);
117 * Creates an AndroidPixelRef that wraps (and refs) another to reuse/share
118 * the same storage and java byte array refcounting, yet have a different
121 AndroidPixelRef(AndroidPixelRef& wrappedPixelRef, const SkImageInfo& info,
122 size_t rowBytes, SkColorTable* ctable);
124 virtual ~AndroidPixelRef();
127 AndroidPixelRef* const fWrappedPixelRef; // if set, delegate memory management calls to this
130 jbyteArray fStorageObj; // The Java byte[] object used as the bitmap backing store
133 /** Allocator which allocates the backing buffer in the Java heap.
134 * Instances can only be used to perform a single allocation, which helps
135 * ensure that the allocated buffer is properly accounted for with a
136 * reference in the heap (or a JNI global reference).
138 class JavaPixelAllocator : public SkBitmap::Allocator {
140 JavaPixelAllocator(JNIEnv* env);
142 virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable);
144 /** Return the Java array object created for the last allocation.
145 * This returns a local JNI reference which the caller is responsible
146 * for storing appropriately (usually by passing it to the Bitmap
149 jbyteArray getStorageObj() { return fStorageObj; }
151 /** Same as getStorageObj(), but also resets the allocator so that it
152 * can allocate again.
154 jbyteArray getStorageObjAndReset() {
155 jbyteArray result = fStorageObj;
163 jbyteArray fStorageObj;
172 class AutoJavaFloatArray {
174 AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
175 int minLength = 0, JNIAccess = kRW_JNIAccess);
176 ~AutoJavaFloatArray();
178 float* ptr() const { return fPtr; }
179 int length() const { return fLen; }
189 class AutoJavaIntArray {
191 AutoJavaIntArray(JNIEnv* env, jintArray array, int minLength = 0);
194 jint* ptr() const { return fPtr; }
195 int length() const { return fLen; }
204 class AutoJavaShortArray {
206 AutoJavaShortArray(JNIEnv* env, jshortArray array,
207 int minLength = 0, JNIAccess = kRW_JNIAccess);
208 ~AutoJavaShortArray();
210 jshort* ptr() const { return fPtr; }
211 int length() const { return fLen; }
221 class AutoJavaByteArray {
223 AutoJavaByteArray(JNIEnv* env, jbyteArray array, int minLength = 0);
224 ~AutoJavaByteArray();
226 jbyte* ptr() const { return fPtr; }
227 int length() const { return fLen; }
236 void doThrowNPE(JNIEnv* env);
237 void doThrowAIOOBE(JNIEnv* env); // Array Index Out Of Bounds Exception
238 void doThrowIAE(JNIEnv* env, const char* msg = NULL); // Illegal Argument
239 void doThrowRE(JNIEnv* env, const char* msg = NULL); // Runtime
240 void doThrowISE(JNIEnv* env, const char* msg = NULL); // Illegal State
241 void doThrowOOME(JNIEnv* env, const char* msg = NULL); // Out of memory
242 void doThrowIOE(JNIEnv* env, const char* msg = NULL); // IO Exception
244 #define NPE_CHECK_RETURN_ZERO(env, object) \
245 do { if (NULL == (object)) { doThrowNPE(env); return 0; } } while (0)
247 #define NPE_CHECK_RETURN_VOID(env, object) \
248 do { if (NULL == (object)) { doThrowNPE(env); return; } } while (0)
250 #endif // _ANDROID_GRAPHICS_GRAPHICS_JNI_H_