1 #define LOG_TAG "GraphicsJNI"
2 
3 #include <unistd.h>
4 #include <sys/mman.h>
5 
6 #include "jni.h"
7 #include <nativehelper/JNIHelp.h>
8 #include "GraphicsJNI.h"
9 #include "core_jni_helpers.h"
10 
11 #include "SkCanvas.h"
12 #include "SkMath.h"
13 #include "SkRegion.h"
14 #include <android_runtime/AndroidRuntime.h>
15 #include <cutils/ashmem.h>
16 #include <hwui/Canvas.h>
17 
18 using namespace android;
19 
doThrowNPE(JNIEnv * env)20 void doThrowNPE(JNIEnv* env) {
21     jniThrowNullPointerException(env, NULL);
22 }
23 
doThrowAIOOBE(JNIEnv * env)24 void doThrowAIOOBE(JNIEnv* env) {
25     jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL);
26 }
27 
doThrowRE(JNIEnv * env,const char * msg)28 void doThrowRE(JNIEnv* env, const char* msg) {
29     jniThrowRuntimeException(env, msg);
30 }
31 
doThrowIAE(JNIEnv * env,const char * msg)32 void doThrowIAE(JNIEnv* env, const char* msg) {
33     jniThrowException(env, "java/lang/IllegalArgumentException", msg);
34 }
35 
doThrowISE(JNIEnv * env,const char * msg)36 void doThrowISE(JNIEnv* env, const char* msg) {
37     jniThrowException(env, "java/lang/IllegalStateException", msg);
38 }
39 
doThrowOOME(JNIEnv * env,const char * msg)40 void doThrowOOME(JNIEnv* env, const char* msg) {
41     jniThrowException(env, "java/lang/OutOfMemoryError", msg);
42 }
43 
doThrowIOE(JNIEnv * env,const char * msg)44 void doThrowIOE(JNIEnv* env, const char* msg) {
45     jniThrowException(env, "java/io/IOException", msg);
46 }
47 
hasException(JNIEnv * env)48 bool GraphicsJNI::hasException(JNIEnv *env) {
49     if (env->ExceptionCheck() != 0) {
50         ALOGE("*** Uncaught exception returned from Java call!\n");
51         env->ExceptionDescribe();
52         return true;
53     }
54     return false;
55 }
56 
57 ///////////////////////////////////////////////////////////////////////////////
58 
AutoJavaFloatArray(JNIEnv * env,jfloatArray array,int minLength,JNIAccess access)59 AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
60                                        int minLength, JNIAccess access)
61 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
62     ALOG_ASSERT(env);
63     if (array) {
64         fLen = env->GetArrayLength(array);
65         if (fLen < minLength) {
66             LOG_ALWAYS_FATAL("bad length");
67         }
68         fPtr = env->GetFloatArrayElements(array, NULL);
69     }
70     fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
71 }
72 
~AutoJavaFloatArray()73 AutoJavaFloatArray::~AutoJavaFloatArray() {
74     if (fPtr) {
75         fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
76     }
77 }
78 
AutoJavaIntArray(JNIEnv * env,jintArray array,int minLength)79 AutoJavaIntArray::AutoJavaIntArray(JNIEnv* env, jintArray array,
80                                        int minLength)
81 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
82     ALOG_ASSERT(env);
83     if (array) {
84         fLen = env->GetArrayLength(array);
85         if (fLen < minLength) {
86             LOG_ALWAYS_FATAL("bad length");
87         }
88         fPtr = env->GetIntArrayElements(array, NULL);
89     }
90 }
91 
~AutoJavaIntArray()92 AutoJavaIntArray::~AutoJavaIntArray() {
93     if (fPtr) {
94         fEnv->ReleaseIntArrayElements(fArray, fPtr, 0);
95     }
96 }
97 
AutoJavaShortArray(JNIEnv * env,jshortArray array,int minLength,JNIAccess access)98 AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
99                                        int minLength, JNIAccess access)
100 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
101     ALOG_ASSERT(env);
102     if (array) {
103         fLen = env->GetArrayLength(array);
104         if (fLen < minLength) {
105             LOG_ALWAYS_FATAL("bad length");
106         }
107         fPtr = env->GetShortArrayElements(array, NULL);
108     }
109     fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
110 }
111 
~AutoJavaShortArray()112 AutoJavaShortArray::~AutoJavaShortArray() {
113     if (fPtr) {
114         fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
115     }
116 }
117 
AutoJavaByteArray(JNIEnv * env,jbyteArray array,int minLength)118 AutoJavaByteArray::AutoJavaByteArray(JNIEnv* env, jbyteArray array,
119                                        int minLength)
120 : fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
121     ALOG_ASSERT(env);
122     if (array) {
123         fLen = env->GetArrayLength(array);
124         if (fLen < minLength) {
125             LOG_ALWAYS_FATAL("bad length");
126         }
127         fPtr = env->GetByteArrayElements(array, NULL);
128     }
129 }
130 
~AutoJavaByteArray()131 AutoJavaByteArray::~AutoJavaByteArray() {
132     if (fPtr) {
133         fEnv->ReleaseByteArrayElements(fArray, fPtr, 0);
134     }
135 }
136 
137 ///////////////////////////////////////////////////////////////////////////////
138 
139 static jclass   gRect_class;
140 static jfieldID gRect_leftFieldID;
141 static jfieldID gRect_topFieldID;
142 static jfieldID gRect_rightFieldID;
143 static jfieldID gRect_bottomFieldID;
144 
145 static jclass   gRectF_class;
146 static jfieldID gRectF_leftFieldID;
147 static jfieldID gRectF_topFieldID;
148 static jfieldID gRectF_rightFieldID;
149 static jfieldID gRectF_bottomFieldID;
150 
151 static jclass   gPoint_class;
152 static jfieldID gPoint_xFieldID;
153 static jfieldID gPoint_yFieldID;
154 
155 static jclass   gPointF_class;
156 static jfieldID gPointF_xFieldID;
157 static jfieldID gPointF_yFieldID;
158 
159 static jclass   gBitmapConfig_class;
160 static jfieldID gBitmapConfig_nativeInstanceID;
161 
162 static jclass   gBitmapRegionDecoder_class;
163 static jmethodID gBitmapRegionDecoder_constructorMethodID;
164 
165 static jclass   gCanvas_class;
166 static jfieldID gCanvas_nativeInstanceID;
167 
168 static jclass   gPicture_class;
169 static jfieldID gPicture_nativeInstanceID;
170 
171 static jclass   gRegion_class;
172 static jfieldID gRegion_nativeInstanceID;
173 static jmethodID gRegion_constructorMethodID;
174 
175 static jclass    gByte_class;
176 static jobject   gVMRuntime;
177 static jclass    gVMRuntime_class;
178 static jmethodID gVMRuntime_newNonMovableArray;
179 static jmethodID gVMRuntime_addressOf;
180 
181 static jclass gColorSpace_class;
182 static jmethodID gColorSpace_getMethodID;
183 static jmethodID gColorSpace_matchMethodID;
184 
185 static jclass gColorSpaceRGB_class;
186 static jmethodID gColorSpaceRGB_constructorMethodID;
187 
188 static jclass gColorSpace_Named_class;
189 static jfieldID gColorSpace_Named_sRGBFieldID;
190 static jfieldID gColorSpace_Named_ExtendedSRGBFieldID;
191 static jfieldID gColorSpace_Named_LinearSRGBFieldID;
192 static jfieldID gColorSpace_Named_LinearExtendedSRGBFieldID;
193 
194 static jclass gTransferParameters_class;
195 static jmethodID gTransferParameters_constructorMethodID;
196 
197 ///////////////////////////////////////////////////////////////////////////////
198 
get_jrect(JNIEnv * env,jobject obj,int * L,int * T,int * R,int * B)199 void GraphicsJNI::get_jrect(JNIEnv* env, jobject obj, int* L, int* T, int* R, int* B)
200 {
201     ALOG_ASSERT(env->IsInstanceOf(obj, gRect_class));
202 
203     *L = env->GetIntField(obj, gRect_leftFieldID);
204     *T = env->GetIntField(obj, gRect_topFieldID);
205     *R = env->GetIntField(obj, gRect_rightFieldID);
206     *B = env->GetIntField(obj, gRect_bottomFieldID);
207 }
208 
set_jrect(JNIEnv * env,jobject obj,int L,int T,int R,int B)209 void GraphicsJNI::set_jrect(JNIEnv* env, jobject obj, int L, int T, int R, int B)
210 {
211     ALOG_ASSERT(env->IsInstanceOf(obj, gRect_class));
212 
213     env->SetIntField(obj, gRect_leftFieldID, L);
214     env->SetIntField(obj, gRect_topFieldID, T);
215     env->SetIntField(obj, gRect_rightFieldID, R);
216     env->SetIntField(obj, gRect_bottomFieldID, B);
217 }
218 
jrect_to_irect(JNIEnv * env,jobject obj,SkIRect * ir)219 SkIRect* GraphicsJNI::jrect_to_irect(JNIEnv* env, jobject obj, SkIRect* ir)
220 {
221     ALOG_ASSERT(env->IsInstanceOf(obj, gRect_class));
222 
223     ir->set(env->GetIntField(obj, gRect_leftFieldID),
224             env->GetIntField(obj, gRect_topFieldID),
225             env->GetIntField(obj, gRect_rightFieldID),
226             env->GetIntField(obj, gRect_bottomFieldID));
227     return ir;
228 }
229 
irect_to_jrect(const SkIRect & ir,JNIEnv * env,jobject obj)230 void GraphicsJNI::irect_to_jrect(const SkIRect& ir, JNIEnv* env, jobject obj)
231 {
232     ALOG_ASSERT(env->IsInstanceOf(obj, gRect_class));
233 
234     env->SetIntField(obj, gRect_leftFieldID, ir.fLeft);
235     env->SetIntField(obj, gRect_topFieldID, ir.fTop);
236     env->SetIntField(obj, gRect_rightFieldID, ir.fRight);
237     env->SetIntField(obj, gRect_bottomFieldID, ir.fBottom);
238 }
239 
jrectf_to_rect(JNIEnv * env,jobject obj,SkRect * r)240 SkRect* GraphicsJNI::jrectf_to_rect(JNIEnv* env, jobject obj, SkRect* r)
241 {
242     ALOG_ASSERT(env->IsInstanceOf(obj, gRectF_class));
243 
244     r->set(env->GetFloatField(obj, gRectF_leftFieldID),
245            env->GetFloatField(obj, gRectF_topFieldID),
246            env->GetFloatField(obj, gRectF_rightFieldID),
247            env->GetFloatField(obj, gRectF_bottomFieldID));
248     return r;
249 }
250 
jrect_to_rect(JNIEnv * env,jobject obj,SkRect * r)251 SkRect* GraphicsJNI::jrect_to_rect(JNIEnv* env, jobject obj, SkRect* r)
252 {
253     ALOG_ASSERT(env->IsInstanceOf(obj, gRect_class));
254 
255     r->set(SkIntToScalar(env->GetIntField(obj, gRect_leftFieldID)),
256            SkIntToScalar(env->GetIntField(obj, gRect_topFieldID)),
257            SkIntToScalar(env->GetIntField(obj, gRect_rightFieldID)),
258            SkIntToScalar(env->GetIntField(obj, gRect_bottomFieldID)));
259     return r;
260 }
261 
rect_to_jrectf(const SkRect & r,JNIEnv * env,jobject obj)262 void GraphicsJNI::rect_to_jrectf(const SkRect& r, JNIEnv* env, jobject obj)
263 {
264     ALOG_ASSERT(env->IsInstanceOf(obj, gRectF_class));
265 
266     env->SetFloatField(obj, gRectF_leftFieldID, SkScalarToFloat(r.fLeft));
267     env->SetFloatField(obj, gRectF_topFieldID, SkScalarToFloat(r.fTop));
268     env->SetFloatField(obj, gRectF_rightFieldID, SkScalarToFloat(r.fRight));
269     env->SetFloatField(obj, gRectF_bottomFieldID, SkScalarToFloat(r.fBottom));
270 }
271 
jpoint_to_ipoint(JNIEnv * env,jobject obj,SkIPoint * point)272 SkIPoint* GraphicsJNI::jpoint_to_ipoint(JNIEnv* env, jobject obj, SkIPoint* point)
273 {
274     ALOG_ASSERT(env->IsInstanceOf(obj, gPoint_class));
275 
276     point->set(env->GetIntField(obj, gPoint_xFieldID),
277                env->GetIntField(obj, gPoint_yFieldID));
278     return point;
279 }
280 
ipoint_to_jpoint(const SkIPoint & ir,JNIEnv * env,jobject obj)281 void GraphicsJNI::ipoint_to_jpoint(const SkIPoint& ir, JNIEnv* env, jobject obj)
282 {
283     ALOG_ASSERT(env->IsInstanceOf(obj, gPoint_class));
284 
285     env->SetIntField(obj, gPoint_xFieldID, ir.fX);
286     env->SetIntField(obj, gPoint_yFieldID, ir.fY);
287 }
288 
jpointf_to_point(JNIEnv * env,jobject obj,SkPoint * point)289 SkPoint* GraphicsJNI::jpointf_to_point(JNIEnv* env, jobject obj, SkPoint* point)
290 {
291     ALOG_ASSERT(env->IsInstanceOf(obj, gPointF_class));
292 
293     point->set(env->GetIntField(obj, gPointF_xFieldID),
294                env->GetIntField(obj, gPointF_yFieldID));
295     return point;
296 }
297 
point_to_jpointf(const SkPoint & r,JNIEnv * env,jobject obj)298 void GraphicsJNI::point_to_jpointf(const SkPoint& r, JNIEnv* env, jobject obj)
299 {
300     ALOG_ASSERT(env->IsInstanceOf(obj, gPointF_class));
301 
302     env->SetFloatField(obj, gPointF_xFieldID, SkScalarToFloat(r.fX));
303     env->SetFloatField(obj, gPointF_yFieldID, SkScalarToFloat(r.fY));
304 }
305 
306 // See enum values in GraphicsJNI.h
colorTypeToLegacyBitmapConfig(SkColorType colorType)307 jint GraphicsJNI::colorTypeToLegacyBitmapConfig(SkColorType colorType) {
308     switch (colorType) {
309         case kRGBA_F16_SkColorType:
310             return kRGBA_16F_LegacyBitmapConfig;
311         case kN32_SkColorType:
312             return kARGB_8888_LegacyBitmapConfig;
313         case kARGB_4444_SkColorType:
314             return kARGB_4444_LegacyBitmapConfig;
315         case kRGB_565_SkColorType:
316             return kRGB_565_LegacyBitmapConfig;
317         case kAlpha_8_SkColorType:
318             return kA8_LegacyBitmapConfig;
319         case kUnknown_SkColorType:
320         default:
321             break;
322     }
323     return kNo_LegacyBitmapConfig;
324 }
325 
legacyBitmapConfigToColorType(jint legacyConfig)326 SkColorType GraphicsJNI::legacyBitmapConfigToColorType(jint legacyConfig) {
327     const uint8_t gConfig2ColorType[] = {
328         kUnknown_SkColorType,
329         kAlpha_8_SkColorType,
330         kUnknown_SkColorType, // Previously kIndex_8_SkColorType,
331         kRGB_565_SkColorType,
332         kARGB_4444_SkColorType,
333         kN32_SkColorType,
334         kRGBA_F16_SkColorType,
335         kN32_SkColorType
336     };
337 
338     if (legacyConfig < 0 || legacyConfig > kLastEnum_LegacyBitmapConfig) {
339         legacyConfig = kNo_LegacyBitmapConfig;
340     }
341     return static_cast<SkColorType>(gConfig2ColorType[legacyConfig]);
342 }
343 
getSkBitmap(JNIEnv * env,jobject bitmap,SkBitmap * outBitmap)344 void GraphicsJNI::getSkBitmap(JNIEnv* env, jobject bitmap, SkBitmap* outBitmap) {
345     bitmap::toBitmap(env, bitmap).getSkBitmap(outBitmap);
346 }
347 
getNativeBitmapColorType(JNIEnv * env,jobject jconfig)348 SkColorType GraphicsJNI::getNativeBitmapColorType(JNIEnv* env, jobject jconfig) {
349     ALOG_ASSERT(env);
350     if (NULL == jconfig) {
351         return kUnknown_SkColorType;
352     }
353     ALOG_ASSERT(env->IsInstanceOf(jconfig, gBitmapConfig_class));
354     int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
355     return legacyBitmapConfigToColorType(c);
356 }
357 
isHardwareConfig(JNIEnv * env,jobject jconfig)358 bool GraphicsJNI::isHardwareConfig(JNIEnv* env, jobject jconfig) {
359     ALOG_ASSERT(env);
360     if (NULL == jconfig) {
361         return false;
362     }
363     int c = env->GetIntField(jconfig, gBitmapConfig_nativeInstanceID);
364     return c == kHardware_LegacyBitmapConfig;
365 }
366 
hardwareLegacyBitmapConfig()367 jint GraphicsJNI::hardwareLegacyBitmapConfig() {
368     return kHardware_LegacyBitmapConfig;
369 }
370 
getNativeCanvas(JNIEnv * env,jobject canvas)371 android::Canvas* GraphicsJNI::getNativeCanvas(JNIEnv* env, jobject canvas) {
372     ALOG_ASSERT(env);
373     ALOG_ASSERT(canvas);
374     ALOG_ASSERT(env->IsInstanceOf(canvas, gCanvas_class));
375     jlong canvasHandle = env->GetLongField(canvas, gCanvas_nativeInstanceID);
376     if (!canvasHandle) {
377         return NULL;
378     }
379     return reinterpret_cast<android::Canvas*>(canvasHandle);
380 }
381 
getNativeRegion(JNIEnv * env,jobject region)382 SkRegion* GraphicsJNI::getNativeRegion(JNIEnv* env, jobject region)
383 {
384     ALOG_ASSERT(env);
385     ALOG_ASSERT(region);
386     ALOG_ASSERT(env->IsInstanceOf(region, gRegion_class));
387     jlong regionHandle = env->GetLongField(region, gRegion_nativeInstanceID);
388     SkRegion* r = reinterpret_cast<SkRegion*>(regionHandle);
389     ALOG_ASSERT(r);
390     return r;
391 }
392 
393 ///////////////////////////////////////////////////////////////////////////////////////////
394 
createBitmapRegionDecoder(JNIEnv * env,SkBitmapRegionDecoder * bitmap)395 jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
396 {
397     ALOG_ASSERT(bitmap != NULL);
398 
399     jobject obj = env->NewObject(gBitmapRegionDecoder_class,
400             gBitmapRegionDecoder_constructorMethodID,
401             reinterpret_cast<jlong>(bitmap));
402     hasException(env); // For the side effect of logging.
403     return obj;
404 }
405 
createRegion(JNIEnv * env,SkRegion * region)406 jobject GraphicsJNI::createRegion(JNIEnv* env, SkRegion* region)
407 {
408     ALOG_ASSERT(region != NULL);
409     jobject obj = env->NewObject(gRegion_class, gRegion_constructorMethodID,
410                                  reinterpret_cast<jlong>(region), 0);
411     hasException(env); // For the side effect of logging.
412     return obj;
413 }
414 
415 ///////////////////////////////////////////////////////////////////////////////
416 
getColorSpace(JNIEnv * env,SkColorSpace * decodeColorSpace,SkColorType decodeColorType)417 jobject GraphicsJNI::getColorSpace(JNIEnv* env, SkColorSpace* decodeColorSpace,
418         SkColorType decodeColorType) {
419     if (!decodeColorSpace || decodeColorType == kAlpha_8_SkColorType) {
420         return nullptr;
421     }
422 
423     // Special checks for the common sRGB cases and their extended variants.
424     jobject namedCS = nullptr;
425     sk_sp<SkColorSpace> srgbLinear = SkColorSpace::MakeSRGBLinear();
426     if (decodeColorType == kRGBA_F16_SkColorType) {
427         // An F16 Bitmap will always report that it is EXTENDED if
428         // it matches a ColorSpace that has an EXTENDED variant.
429         if (decodeColorSpace->isSRGB()) {
430             namedCS = env->GetStaticObjectField(gColorSpace_Named_class,
431                                                 gColorSpace_Named_ExtendedSRGBFieldID);
432         } else if (decodeColorSpace == srgbLinear.get()) {
433             namedCS = env->GetStaticObjectField(gColorSpace_Named_class,
434                                                 gColorSpace_Named_LinearExtendedSRGBFieldID);
435         }
436     } else if (decodeColorSpace->isSRGB()) {
437         namedCS = env->GetStaticObjectField(gColorSpace_Named_class,
438                                             gColorSpace_Named_sRGBFieldID);
439     } else if (decodeColorSpace == srgbLinear.get()) {
440         namedCS = env->GetStaticObjectField(gColorSpace_Named_class,
441                                             gColorSpace_Named_LinearSRGBFieldID);
442     }
443 
444     if (namedCS) {
445         return env->CallStaticObjectMethod(gColorSpace_class, gColorSpace_getMethodID, namedCS);
446     }
447 
448     // Try to match against known RGB color spaces using the CIE XYZ D50
449     // conversion matrix and numerical transfer function parameters
450     skcms_Matrix3x3 xyzMatrix;
451     LOG_ALWAYS_FATAL_IF(!decodeColorSpace->toXYZD50(&xyzMatrix));
452 
453     skcms_TransferFunction transferParams;
454     // We can only handle numerical transfer functions at the moment
455     LOG_ALWAYS_FATAL_IF(!decodeColorSpace->isNumericalTransferFn(&transferParams));
456 
457     jobject params = env->NewObject(gTransferParameters_class,
458             gTransferParameters_constructorMethodID,
459             transferParams.a, transferParams.b, transferParams.c,
460             transferParams.d, transferParams.e, transferParams.f,
461             transferParams.g);
462 
463     jfloatArray xyzArray = env->NewFloatArray(9);
464     jfloat xyz[9] = {
465             xyzMatrix.vals[0][0],
466             xyzMatrix.vals[1][0],
467             xyzMatrix.vals[2][0],
468             xyzMatrix.vals[0][1],
469             xyzMatrix.vals[1][1],
470             xyzMatrix.vals[2][1],
471             xyzMatrix.vals[0][2],
472             xyzMatrix.vals[1][2],
473             xyzMatrix.vals[2][2]
474     };
475     env->SetFloatArrayRegion(xyzArray, 0, 9, xyz);
476 
477     jobject colorSpace = env->CallStaticObjectMethod(gColorSpace_class,
478             gColorSpace_matchMethodID, xyzArray, params);
479 
480     if (colorSpace == nullptr) {
481         // We couldn't find an exact match, let's create a new color space
482         // instance with the 3x3 conversion matrix and transfer function
483         colorSpace = env->NewObject(gColorSpaceRGB_class,
484                 gColorSpaceRGB_constructorMethodID,
485                 env->NewStringUTF("Unknown"), xyzArray, params);
486     }
487 
488     env->DeleteLocalRef(xyzArray);
489     return colorSpace;
490 }
491 
492 ///////////////////////////////////////////////////////////////////////////////
allocPixelRef(SkBitmap * bitmap)493 bool HeapAllocator::allocPixelRef(SkBitmap* bitmap) {
494     mStorage = android::Bitmap::allocateHeapBitmap(bitmap);
495     return !!mStorage;
496 }
497 
498 ////////////////////////////////////////////////////////////////////////////////
499 
RecyclingClippingPixelAllocator(android::Bitmap * recycledBitmap,size_t recycledBytes)500 RecyclingClippingPixelAllocator::RecyclingClippingPixelAllocator(
501         android::Bitmap* recycledBitmap, size_t recycledBytes)
502     : mRecycledBitmap(recycledBitmap)
503     , mRecycledBytes(recycledBytes)
504     , mSkiaBitmap(nullptr)
505     , mNeedsCopy(false)
506 {}
507 
~RecyclingClippingPixelAllocator()508 RecyclingClippingPixelAllocator::~RecyclingClippingPixelAllocator() {}
509 
allocPixelRef(SkBitmap * bitmap)510 bool RecyclingClippingPixelAllocator::allocPixelRef(SkBitmap* bitmap) {
511     // Ensure that the caller did not pass in a NULL bitmap to the constructor or this
512     // function.
513     LOG_ALWAYS_FATAL_IF(!mRecycledBitmap);
514     LOG_ALWAYS_FATAL_IF(!bitmap);
515     mSkiaBitmap = bitmap;
516 
517     // This behaves differently than the RecyclingPixelAllocator.  For backwards
518     // compatibility, the original color type of the recycled bitmap must be maintained.
519     if (mRecycledBitmap->info().colorType() != bitmap->colorType()) {
520         return false;
521     }
522 
523     // The Skia bitmap specifies the width and height needed by the decoder.
524     // mRecycledBitmap specifies the width and height of the bitmap that we
525     // want to reuse.  Neither can be changed.  We will try to find a way
526     // to reuse the memory.
527     const int maxWidth = SkTMax(bitmap->width(), mRecycledBitmap->info().width());
528     const int maxHeight = SkTMax(bitmap->height(), mRecycledBitmap->info().height());
529     const SkImageInfo maxInfo = bitmap->info().makeWH(maxWidth, maxHeight);
530     const size_t rowBytes = maxInfo.minRowBytes();
531     const size_t bytesNeeded = maxInfo.computeByteSize(rowBytes);
532     if (bytesNeeded <= mRecycledBytes) {
533         // Here we take advantage of reconfigure() to reset the rowBytes
534         // of mRecycledBitmap.  It is very important that we pass in
535         // mRecycledBitmap->info() for the SkImageInfo.  According to the
536         // specification for BitmapRegionDecoder, we are not allowed to change
537         // the SkImageInfo.
538         // We can (must) preserve the color space since it doesn't affect the
539         // storage needs
540         mRecycledBitmap->reconfigure(
541                 mRecycledBitmap->info().makeColorSpace(bitmap->refColorSpace()),
542                 rowBytes);
543 
544         // Give the bitmap the same pixelRef as mRecycledBitmap.
545         // skbug.com/4538: We also need to make sure that the rowBytes on the pixel ref
546         //                 match the rowBytes on the bitmap.
547         bitmap->setInfo(bitmap->info(), rowBytes);
548         bitmap->setPixelRef(sk_ref_sp(mRecycledBitmap), 0, 0);
549 
550         // Make sure that the recycled bitmap has the correct alpha type.
551         mRecycledBitmap->setAlphaType(bitmap->alphaType());
552 
553         bitmap->notifyPixelsChanged();
554         mNeedsCopy = false;
555 
556         // TODO: If the dimensions of the SkBitmap are smaller than those of
557         // mRecycledBitmap, should we zero the memory in mRecycledBitmap?
558         return true;
559     }
560 
561     // In the event that mRecycledBitmap is not large enough, allocate new memory
562     // on the heap.
563     SkBitmap::HeapAllocator heapAllocator;
564 
565     // We will need to copy from heap memory to mRecycledBitmap's memory after the
566     // decode is complete.
567     mNeedsCopy = true;
568 
569     return heapAllocator.allocPixelRef(bitmap);
570 }
571 
copyIfNecessary()572 void RecyclingClippingPixelAllocator::copyIfNecessary() {
573     if (mNeedsCopy) {
574         mRecycledBitmap->ref();
575         SkPixelRef* recycledPixels = mRecycledBitmap;
576         void* dst = recycledPixels->pixels();
577         const size_t dstRowBytes = mRecycledBitmap->rowBytes();
578         const size_t bytesToCopy = std::min(mRecycledBitmap->info().minRowBytes(),
579                 mSkiaBitmap->info().minRowBytes());
580         const int rowsToCopy = std::min(mRecycledBitmap->info().height(),
581                 mSkiaBitmap->info().height());
582         for (int y = 0; y < rowsToCopy; y++) {
583             memcpy(dst, mSkiaBitmap->getAddr(0, y), bytesToCopy);
584             dst = SkTAddOffset<void>(dst, dstRowBytes);
585         }
586         recycledPixels->notifyPixelsChanged();
587         recycledPixels->unref();
588     }
589     mRecycledBitmap = nullptr;
590     mSkiaBitmap = nullptr;
591 }
592 
593 ////////////////////////////////////////////////////////////////////////////////
594 
AshmemPixelAllocator(JNIEnv * env)595 AshmemPixelAllocator::AshmemPixelAllocator(JNIEnv *env) {
596     LOG_ALWAYS_FATAL_IF(env->GetJavaVM(&mJavaVM) != JNI_OK,
597             "env->GetJavaVM failed");
598 }
599 
allocPixelRef(SkBitmap * bitmap)600 bool AshmemPixelAllocator::allocPixelRef(SkBitmap* bitmap) {
601     mStorage = android::Bitmap::allocateAshmemBitmap(bitmap);
602     return !!mStorage;
603 }
604 
605 ////////////////////////////////////////////////////////////////////////////////
606 
register_android_graphics_Graphics(JNIEnv * env)607 int register_android_graphics_Graphics(JNIEnv* env)
608 {
609     jmethodID m;
610     jclass c;
611 
612     gRect_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Rect"));
613     gRect_leftFieldID = GetFieldIDOrDie(env, gRect_class, "left", "I");
614     gRect_topFieldID = GetFieldIDOrDie(env, gRect_class, "top", "I");
615     gRect_rightFieldID = GetFieldIDOrDie(env, gRect_class, "right", "I");
616     gRect_bottomFieldID = GetFieldIDOrDie(env, gRect_class, "bottom", "I");
617 
618     gRectF_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/RectF"));
619     gRectF_leftFieldID = GetFieldIDOrDie(env, gRectF_class, "left", "F");
620     gRectF_topFieldID = GetFieldIDOrDie(env, gRectF_class, "top", "F");
621     gRectF_rightFieldID = GetFieldIDOrDie(env, gRectF_class, "right", "F");
622     gRectF_bottomFieldID = GetFieldIDOrDie(env, gRectF_class, "bottom", "F");
623 
624     gPoint_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Point"));
625     gPoint_xFieldID = GetFieldIDOrDie(env, gPoint_class, "x", "I");
626     gPoint_yFieldID = GetFieldIDOrDie(env, gPoint_class, "y", "I");
627 
628     gPointF_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/PointF"));
629     gPointF_xFieldID = GetFieldIDOrDie(env, gPointF_class, "x", "F");
630     gPointF_yFieldID = GetFieldIDOrDie(env, gPointF_class, "y", "F");
631 
632     gBitmapRegionDecoder_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/BitmapRegionDecoder"));
633     gBitmapRegionDecoder_constructorMethodID = GetMethodIDOrDie(env, gBitmapRegionDecoder_class, "<init>", "(J)V");
634 
635     gBitmapConfig_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Bitmap$Config"));
636     gBitmapConfig_nativeInstanceID = GetFieldIDOrDie(env, gBitmapConfig_class, "nativeInt", "I");
637 
638     gCanvas_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Canvas"));
639     gCanvas_nativeInstanceID = GetFieldIDOrDie(env, gCanvas_class, "mNativeCanvasWrapper", "J");
640 
641     gPicture_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Picture"));
642     gPicture_nativeInstanceID = GetFieldIDOrDie(env, gPicture_class, "mNativePicture", "J");
643 
644     gRegion_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Region"));
645     gRegion_nativeInstanceID = GetFieldIDOrDie(env, gRegion_class, "mNativeRegion", "J");
646     gRegion_constructorMethodID = GetMethodIDOrDie(env, gRegion_class, "<init>", "(JI)V");
647 
648     c = env->FindClass("java/lang/Byte");
649     gByte_class = (jclass) env->NewGlobalRef(
650         env->GetStaticObjectField(c, env->GetStaticFieldID(c, "TYPE", "Ljava/lang/Class;")));
651 
652     gVMRuntime_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "dalvik/system/VMRuntime"));
653     m = env->GetStaticMethodID(gVMRuntime_class, "getRuntime", "()Ldalvik/system/VMRuntime;");
654     gVMRuntime = env->NewGlobalRef(env->CallStaticObjectMethod(gVMRuntime_class, m));
655     gVMRuntime_newNonMovableArray = GetMethodIDOrDie(env, gVMRuntime_class, "newNonMovableArray",
656                                                      "(Ljava/lang/Class;I)Ljava/lang/Object;");
657     gVMRuntime_addressOf = GetMethodIDOrDie(env, gVMRuntime_class, "addressOf", "(Ljava/lang/Object;)J");
658 
659     gColorSpace_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/ColorSpace"));
660     gColorSpace_getMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class,
661             "get", "(Landroid/graphics/ColorSpace$Named;)Landroid/graphics/ColorSpace;");
662     gColorSpace_matchMethodID = GetStaticMethodIDOrDie(env, gColorSpace_class, "match",
663             "([FLandroid/graphics/ColorSpace$Rgb$TransferParameters;)Landroid/graphics/ColorSpace;");
664 
665     gColorSpaceRGB_class = MakeGlobalRefOrDie(env,
666             FindClassOrDie(env, "android/graphics/ColorSpace$Rgb"));
667     gColorSpaceRGB_constructorMethodID = GetMethodIDOrDie(env, gColorSpaceRGB_class,
668             "<init>", "(Ljava/lang/String;[FLandroid/graphics/ColorSpace$Rgb$TransferParameters;)V");
669 
670     gColorSpace_Named_class = MakeGlobalRefOrDie(env,
671             FindClassOrDie(env, "android/graphics/ColorSpace$Named"));
672     gColorSpace_Named_sRGBFieldID = GetStaticFieldIDOrDie(env,
673             gColorSpace_Named_class, "SRGB", "Landroid/graphics/ColorSpace$Named;");
674     gColorSpace_Named_ExtendedSRGBFieldID = GetStaticFieldIDOrDie(env,
675             gColorSpace_Named_class, "EXTENDED_SRGB", "Landroid/graphics/ColorSpace$Named;");
676     gColorSpace_Named_LinearSRGBFieldID = GetStaticFieldIDOrDie(env,
677             gColorSpace_Named_class, "LINEAR_SRGB", "Landroid/graphics/ColorSpace$Named;");
678     gColorSpace_Named_LinearExtendedSRGBFieldID = GetStaticFieldIDOrDie(env,
679             gColorSpace_Named_class, "LINEAR_EXTENDED_SRGB", "Landroid/graphics/ColorSpace$Named;");
680 
681     gTransferParameters_class = MakeGlobalRefOrDie(env, FindClassOrDie(env,
682             "android/graphics/ColorSpace$Rgb$TransferParameters"));
683     gTransferParameters_constructorMethodID = GetMethodIDOrDie(env, gTransferParameters_class,
684             "<init>", "(DDDDDDD)V");
685 
686     return 0;
687 }
688