1 /*
2 * Copyright (C) 2013 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 #define LOG_TAG "GraphicBuffer"
18
19 #include "jni.h"
20 #include <nativehelper/JNIHelp.h>
21 #include <inttypes.h>
22
23 #include "android_os_Parcel.h"
24 #include <binder/Parcel.h>
25
26 #include <log/log.h>
27
28 #include <ui/GraphicBuffer.h>
29 #include <ui/PixelFormat.h>
30
31 #include <android/native_window.h>
32 #include <android/graphics/canvas.h>
33 #include <android_runtime/android_graphics_GraphicBuffer.h>
34 #include <android_runtime/android_hardware_HardwareBuffer.h>
35 #include <private/android/AHardwareBufferHelpers.h>
36
37 #include <private/gui/ComposerService.h>
38
39 #include "core_jni_helpers.h"
40
41 namespace android {
42
43 // ----------------------------------------------------------------------------
44 // Defines
45 // ----------------------------------------------------------------------------
46
47 // Debug
48 static const bool kDebugGraphicBuffer = false;
49
50 #define LOCK_CANVAS_USAGE (GraphicBuffer::USAGE_SW_READ_OFTEN | GraphicBuffer::USAGE_SW_WRITE_OFTEN)
51
52 // ----------------------------------------------------------------------------
53 // JNI Helpers
54 // ----------------------------------------------------------------------------
55
56 static struct {
57 jfieldID mNativeObject;
58 jclass mClass;
59 jmethodID mConstructorMethodID;
60 } gGraphicBufferClassInfo;
61
62 static struct {
63 jmethodID set;
64 jfieldID left;
65 jfieldID top;
66 jfieldID right;
67 jfieldID bottom;
68 } gRectClassInfo;
69
70 #define GET_INT(object, field) \
71 env->GetIntField(object, field)
72
73 #define SET_INT(object, field, value) \
74 env->SetIntField(object, field, value)
75
76 #define GET_LONG(object, field) \
77 env->GetLongField(object, field)
78
79 #define SET_LONG(object, field, value) \
80 env->SetLongField(object, field, value)
81
82 #define INVOKEV(object, method, ...) \
83 env->CallVoidMethod(object, method, __VA_ARGS__)
84
85 // ----------------------------------------------------------------------------
86 // Types
87 // ----------------------------------------------------------------------------
88
89 class GraphicBufferWrapper {
90 public:
GraphicBufferWrapper(const sp<GraphicBuffer> & buffer)91 explicit GraphicBufferWrapper(const sp<GraphicBuffer>& buffer): buffer(buffer) {
92 LOG_ALWAYS_FATAL_IF(buffer == nullptr, "creating a null GraphicBuffer");
93 }
get() const94 const sp<GraphicBuffer>& get() const {
95 return buffer;
96 }
97
98 private:
99 // make sure this is immutable
100 sp<GraphicBuffer> const buffer;
101 };
102
103 // ----------------------------------------------------------------------------
104 // GraphicBuffer lifecycle
105 // ----------------------------------------------------------------------------
106
android_graphics_GraphicBuffer_create(JNIEnv * env,jobject clazz,jint width,jint height,jint format,jint usage)107 static jlong android_graphics_GraphicBuffer_create(JNIEnv* env, jobject clazz,
108 jint width, jint height, jint format, jint usage) {
109
110 sp<GraphicBuffer> buffer = new GraphicBuffer(
111 uint32_t(width), uint32_t(height), PixelFormat(format), uint32_t(usage),
112 std::string("android_graphics_GraphicBuffer_create pid [") +
113 std::to_string(getpid()) +"]");
114
115 status_t error = buffer->initCheck();
116 if (error < 0) {
117 ALOGW_IF(kDebugGraphicBuffer, "createGraphicBuffer() failed in GraphicBuffer.create()");
118 return NULL;
119 }
120
121 GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer);
122 return reinterpret_cast<jlong>(wrapper);
123 }
124
android_graphics_GraphicBuffer_destroy(JNIEnv * env,jobject clazz,jlong wrapperHandle)125 static void android_graphics_GraphicBuffer_destroy(JNIEnv* env, jobject clazz,
126 jlong wrapperHandle) {
127 GraphicBufferWrapper* wrapper =
128 reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle);
129 delete wrapper;
130 }
131
132 // ----------------------------------------------------------------------------
133 // Canvas management
134 // ----------------------------------------------------------------------------
135
android_graphics_GraphicBuffer_lockCanvas(JNIEnv * env,jobject,jlong wrapperHandle,jobject canvasObj,jobject dirtyRect)136 static jboolean android_graphics_GraphicBuffer_lockCanvas(JNIEnv* env, jobject,
137 jlong wrapperHandle, jobject canvasObj, jobject dirtyRect) {
138
139 GraphicBufferWrapper* wrapper =
140 reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle);
141 if (!wrapper) {
142 return JNI_FALSE;
143 }
144
145 sp<GraphicBuffer> buffer(wrapper->get());
146
147 Rect rect(Rect::EMPTY_RECT);
148 if (dirtyRect) {
149 rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
150 rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
151 rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
152 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
153 } else {
154 rect.set(Rect(buffer->getWidth(), buffer->getHeight()));
155 }
156
157 void* bits = NULL;
158 status_t status = buffer->lock(LOCK_CANVAS_USAGE, rect, &bits);
159
160 if (status) return JNI_FALSE;
161 if (!bits) {
162 buffer->unlock();
163 return JNI_FALSE;
164 }
165
166 ANativeWindow_Buffer nativeBuffer;
167 nativeBuffer.width = buffer->getWidth();
168 nativeBuffer.height = buffer->getHeight();
169 nativeBuffer.stride = buffer->getStride();
170 nativeBuffer.format = AHardwareBuffer_convertFromPixelFormat(buffer->getPixelFormat());
171 nativeBuffer.bits = bits;
172
173 graphics::Canvas canvas(env, canvasObj);
174 canvas.setBuffer(&nativeBuffer, ADATASPACE_UNKNOWN);
175 canvas.clipRect({rect.left, rect.top, rect.right, rect.bottom});
176
177 if (dirtyRect) {
178 INVOKEV(dirtyRect, gRectClassInfo.set,
179 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
180 }
181
182 return JNI_TRUE;
183 }
184
android_graphics_GraphicBuffer_unlockCanvasAndPost(JNIEnv * env,jobject,jlong wrapperHandle,jobject canvasObj)185 static jboolean android_graphics_GraphicBuffer_unlockCanvasAndPost(JNIEnv* env, jobject,
186 jlong wrapperHandle, jobject canvasObj) {
187 // release the buffer from the canvas
188 graphics::Canvas canvas(env, canvasObj);
189 canvas.setBuffer(nullptr, ADATASPACE_UNKNOWN);
190
191 GraphicBufferWrapper* wrapper =
192 reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle);
193 if (wrapper) {
194 status_t status = wrapper->get()->unlock();
195 return status == 0 ? JNI_TRUE : JNI_FALSE;
196 }
197
198 return JNI_FALSE;
199 }
200
201 // ----------------------------------------------------------------------------
202 // Serialization
203 // ----------------------------------------------------------------------------
204
android_graphics_GraphicBuffer_write(JNIEnv * env,jobject clazz,jlong wrapperHandle,jobject dest)205 static void android_graphics_GraphicBuffer_write(JNIEnv* env, jobject clazz,
206 jlong wrapperHandle, jobject dest) {
207
208 GraphicBufferWrapper* wrapper =
209 reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle);
210 Parcel* parcel = parcelForJavaObject(env, dest);
211 if (parcel) {
212 parcel->write(*wrapper->get());
213 }
214 }
215
android_graphics_GraphicBuffer_read(JNIEnv * env,jobject clazz,jobject in)216 static jlong android_graphics_GraphicBuffer_read(JNIEnv* env, jobject clazz,
217 jobject in) {
218
219 Parcel* parcel = parcelForJavaObject(env, in);
220 if (parcel) {
221 sp<GraphicBuffer> buffer = new GraphicBuffer();
222 parcel->read(*buffer);
223 return reinterpret_cast<jlong>(new GraphicBufferWrapper(buffer));
224 }
225
226 return NULL;
227 }
228
229 // ----------------------------------------------------------------------------
230 // External helpers
231 // ----------------------------------------------------------------------------
232
android_graphics_GraphicBuffer_getNativeGraphicsBuffer(JNIEnv * env,jobject obj)233 sp<GraphicBuffer> android_graphics_GraphicBuffer_getNativeGraphicsBuffer(JNIEnv* env, jobject obj) {
234 if (obj) {
235 jlong nativeObject = env->GetLongField(obj, gGraphicBufferClassInfo.mNativeObject);
236 GraphicBufferWrapper* wrapper = (GraphicBufferWrapper*) nativeObject;
237 if (wrapper != NULL) {
238 sp<GraphicBuffer> buffer(wrapper->get());
239 return buffer;
240 }
241 }
242 return NULL;
243 }
244
android_graphics_GraphicBuffer_createFromAHardwareBuffer(JNIEnv * env,AHardwareBuffer * hardwareBuffer)245 jobject android_graphics_GraphicBuffer_createFromAHardwareBuffer(JNIEnv* env,
246 AHardwareBuffer* hardwareBuffer) {
247 GraphicBuffer* buffer = GraphicBuffer::fromAHardwareBuffer(hardwareBuffer);
248 GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer);
249 jobject obj = env->NewObject(gGraphicBufferClassInfo.mClass,
250 gGraphicBufferClassInfo.mConstructorMethodID, buffer->getWidth(), buffer->getHeight(),
251 buffer->getPixelFormat(), (jint)buffer->getUsage(), reinterpret_cast<jlong>(wrapper));
252 return obj;
253 }
254
255 // ----------------------------------------------------------------------------
256 // AHB to GraphicBuffer Converter
257 // ----------------------------------------------------------------------------
258
android_graphics_GraphicBuffer_createFromHardwareBuffer(JNIEnv * env,jobject clazz,jobject hb)259 static jobject android_graphics_GraphicBuffer_createFromHardwareBuffer(JNIEnv* env, jobject clazz,
260 jobject hb) {
261 AHardwareBuffer* ahb = android_hardware_HardwareBuffer_getNativeHardwareBuffer(env, hb);
262 return android_graphics_GraphicBuffer_createFromAHardwareBuffer(env, ahb);
263 }
264
265 };
266
267 using namespace android;
268 // ----------------------------------------------------------------------------
269 // JNI Glue
270 // ----------------------------------------------------------------------------
271
272 const char* const kClassPathName = "android/graphics/GraphicBuffer";
273
274 static const JNINativeMethod gMethods[] = {
275 { "nCreateGraphicBuffer", "(IIII)J", (void*) android_graphics_GraphicBuffer_create },
276 { "nDestroyGraphicBuffer", "(J)V", (void*) android_graphics_GraphicBuffer_destroy },
277
278 { "nWriteGraphicBufferToParcel", "(JLandroid/os/Parcel;)V",
279 (void*) android_graphics_GraphicBuffer_write },
280 { "nReadGraphicBufferFromParcel", "(Landroid/os/Parcel;)J",
281 (void*) android_graphics_GraphicBuffer_read },
282
283 { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z",
284 (void*) android_graphics_GraphicBuffer_lockCanvas },
285 { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)Z",
286 (void*) android_graphics_GraphicBuffer_unlockCanvasAndPost },
287 { "nCreateFromHardwareBuffer",
288 "(Landroid/hardware/HardwareBuffer;)Landroid/graphics/GraphicBuffer;",
289 (void*) android_graphics_GraphicBuffer_createFromHardwareBuffer }
290 };
291
register_android_graphics_GraphicBuffer(JNIEnv * env)292 int register_android_graphics_GraphicBuffer(JNIEnv* env) {
293 gGraphicBufferClassInfo.mClass = MakeGlobalRefOrDie(env, FindClassOrDie(env, kClassPathName));
294 gGraphicBufferClassInfo.mNativeObject = GetFieldIDOrDie(env, gGraphicBufferClassInfo.mClass,
295 "mNativeObject", "J");
296 gGraphicBufferClassInfo.mConstructorMethodID = env->GetMethodID(gGraphicBufferClassInfo.mClass,
297 "<init>", "(IIIIJ)V");
298
299 jclass clazz = FindClassOrDie(env, "android/graphics/Rect");
300 gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V");
301 gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I");
302 gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I");
303 gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I");
304 gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I");
305
306 return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
307 }
308