android_view_Surface.cpp revision 88e4b3ff90b86de6e358c717dbd0959e8b1b8267 
1/*
2 * Copyright (C) 2007 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 "Surface"
18
19#include <stdio.h>
20
21#include "jni.h"
22#include "JNIHelp.h"
23#include "android_os_Parcel.h"
24#include "android/graphics/GraphicsJNI.h"
25
26#include <android_runtime/AndroidRuntime.h>
27#include <android_runtime/android_view_Surface.h>
28#include <android_runtime/android_graphics_SurfaceTexture.h>
29
30#include <gui/Surface.h>
31#include <gui/GLConsumer.h>
32
33#include <ui/Rect.h>
34#include <ui/Region.h>
35
36#include <SkCanvas.h>
37#include <SkBitmap.h>
38#include <SkRegion.h>
39
40#include <utils/misc.h>
41#include <utils/Log.h>
42
43#include <ScopedUtfChars.h>
44
45// ----------------------------------------------------------------------------
46
47namespace android {
48
49static const char* const OutOfResourcesException =
50    "android/view/Surface$OutOfResourcesException";
51
52static struct {
53    jclass clazz;
54    jfieldID mNativeObject;
55    jfieldID mGenerationId;
56    jfieldID mCanvas;
57    jmethodID ctor;
58} gSurfaceClassInfo;
59
60static struct {
61    jfieldID left;
62    jfieldID top;
63    jfieldID right;
64    jfieldID bottom;
65} gRectClassInfo;
66
67static struct {
68    jfieldID mFinalizer;
69    jfieldID mNativeCanvas;
70    jfieldID mSurfaceFormat;
71} gCanvasClassInfo;
72
73static struct {
74    jfieldID mNativeCanvas;
75} gCanvasFinalizerClassInfo;
76
77// ----------------------------------------------------------------------------
78
79bool android_view_Surface_isInstanceOf(JNIEnv* env, jobject obj) {
80    return env->IsInstanceOf(obj, gSurfaceClassInfo.clazz);
81}
82
83sp<ANativeWindow> android_view_Surface_getNativeWindow(JNIEnv* env, jobject surfaceObj) {
84    return android_view_Surface_getSurface(env, surfaceObj);
85}
86
87sp<Surface> android_view_Surface_getSurface(JNIEnv* env, jobject surfaceObj) {
88    return reinterpret_cast<Surface *>(
89            env->GetIntField(surfaceObj, gSurfaceClassInfo.mNativeObject));
90}
91
92jobject android_view_Surface_createFromISurfaceTexture(JNIEnv* env,
93        const sp<IGraphicBufferProducer>& bufferProducer) {
94    if (bufferProducer == NULL) {
95        return NULL;
96    }
97
98    sp<Surface> surface(new Surface(bufferProducer));
99    if (surface == NULL) {
100        return NULL;
101    }
102
103    jobject surfaceObj = env->NewObject(gSurfaceClassInfo.clazz, gSurfaceClassInfo.ctor, surface.get());
104    if (surfaceObj == NULL) {
105        if (env->ExceptionCheck()) {
106            ALOGE("Could not create instance of Surface from IGraphicBufferProducer.");
107            LOGE_EX(env);
108            env->ExceptionClear();
109        }
110        return NULL;
111    }
112    surface->incStrong(surfaceObj);
113    return surfaceObj;
114}
115
116// ----------------------------------------------------------------------------
117
118static jint nativeCreateFromSurfaceTexture(JNIEnv* env, jobject surfaceObj,
119        jobject surfaceTextureObj) {
120    sp<GLConsumer> st(SurfaceTexture_getSurfaceTexture(env, surfaceTextureObj));
121    if (st == NULL) {
122        jniThrowException(env, "java/lang/IllegalArgumentException",
123                "SurfaceTexture has already been released");
124        return 0;
125    }
126
127    sp<IGraphicBufferProducer> bq = st->getBufferQueue();
128    sp<Surface> surface(new Surface(bq));
129    if (surface == NULL) {
130        jniThrowException(env, OutOfResourcesException, NULL);
131        return 0;
132    }
133
134    surface->incStrong(surfaceObj);
135    return int(surface.get());
136}
137
138static void nativeRelease(JNIEnv* env, jobject surfaceObj, jint nativeObject) {
139    sp<Surface> sur(reinterpret_cast<Surface *>(nativeObject));
140    sur->decStrong(surfaceObj);
141}
142
143static void nativeDestroy(JNIEnv* env, jobject surfaceObj, jint nativeObject) {
144    sp<Surface> sur(reinterpret_cast<Surface *>(nativeObject));
145    sur->decStrong(surfaceObj);
146}
147
148static jboolean nativeIsValid(JNIEnv* env, jobject surfaceObj, jint nativeObject) {
149    sp<Surface> sur(reinterpret_cast<Surface *>(nativeObject));
150    return Surface::isValid(sur) ? JNI_TRUE : JNI_FALSE;
151}
152
153static jboolean nativeIsConsumerRunningBehind(JNIEnv* env, jobject surfaceObj, jint nativeObject) {
154    sp<Surface> sur(reinterpret_cast<Surface *>(nativeObject));
155    if (!Surface::isValid(sur)) {
156        doThrowIAE(env);
157        return JNI_FALSE;
158    }
159    int value = 0;
160    ANativeWindow* anw = static_cast<ANativeWindow*>(sur.get());
161    anw->query(anw, NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND, &value);
162    return value;
163}
164
165static inline SkBitmap::Config convertPixelFormat(PixelFormat format) {
166    /* note: if PIXEL_FORMAT_RGBX_8888 means that all alpha bytes are 0xFF, then
167        we can map to SkBitmap::kARGB_8888_Config, and optionally call
168        bitmap.setIsOpaque(true) on the resulting SkBitmap (as an accelerator)
169    */
170    switch (format) {
171    case PIXEL_FORMAT_RGBX_8888:    return SkBitmap::kARGB_8888_Config;
172    case PIXEL_FORMAT_RGBA_8888:    return SkBitmap::kARGB_8888_Config;
173    case PIXEL_FORMAT_RGBA_4444:    return SkBitmap::kARGB_4444_Config;
174    case PIXEL_FORMAT_RGB_565:      return SkBitmap::kRGB_565_Config;
175    case PIXEL_FORMAT_A_8:          return SkBitmap::kA8_Config;
176    default:                        return SkBitmap::kNo_Config;
177    }
178}
179
180static inline void swapCanvasPtr(JNIEnv* env, jobject canvasObj, SkCanvas* newCanvas) {
181  jobject canvasFinalizerObj = env->GetObjectField(canvasObj, gCanvasClassInfo.mFinalizer);
182  SkCanvas* previousCanvas = reinterpret_cast<SkCanvas*>(
183          env->GetIntField(canvasObj, gCanvasClassInfo.mNativeCanvas));
184  env->SetIntField(canvasObj, gCanvasClassInfo.mNativeCanvas, (int)newCanvas);
185  env->SetIntField(canvasFinalizerObj, gCanvasFinalizerClassInfo.mNativeCanvas, (int)newCanvas);
186  SkSafeUnref(previousCanvas);
187}
188
189static jobject nativeLockCanvas(JNIEnv* env, jobject surfaceObj, jint nativeObject, jobject dirtyRectObj) {
190    sp<Surface> surface(reinterpret_cast<Surface *>(nativeObject));
191
192    if (!Surface::isValid(surface)) {
193        doThrowIAE(env);
194        return NULL;
195    }
196
197    // get dirty region
198    Region dirtyRegion;
199    if (dirtyRectObj) {
200        Rect dirty;
201        dirty.left = env->GetIntField(dirtyRectObj, gRectClassInfo.left);
202        dirty.top = env->GetIntField(dirtyRectObj, gRectClassInfo.top);
203        dirty.right = env->GetIntField(dirtyRectObj, gRectClassInfo.right);
204        dirty.bottom = env->GetIntField(dirtyRectObj, gRectClassInfo.bottom);
205        if (!dirty.isEmpty()) {
206            dirtyRegion.set(dirty);
207        }
208    } else {
209        dirtyRegion.set(Rect(0x3FFF, 0x3FFF));
210    }
211
212    Surface::SurfaceInfo info;
213    status_t err = surface->lock(&info, &dirtyRegion);
214    if (err < 0) {
215        const char* const exception = (err == NO_MEMORY) ?
216                OutOfResourcesException :
217                "java/lang/IllegalArgumentException";
218        jniThrowException(env, exception, NULL);
219        return NULL;
220    }
221
222    // Associate a SkCanvas object to this surface
223    jobject canvasObj = env->GetObjectField(surfaceObj, gSurfaceClassInfo.mCanvas);
224    env->SetIntField(canvasObj, gCanvasClassInfo.mSurfaceFormat, info.format);
225
226    SkBitmap bitmap;
227    ssize_t bpr = info.s * bytesPerPixel(info.format);
228    bitmap.setConfig(convertPixelFormat(info.format), info.w, info.h, bpr);
229    if (info.format == PIXEL_FORMAT_RGBX_8888) {
230        bitmap.setIsOpaque(true);
231    }
232    if (info.w > 0 && info.h > 0) {
233        bitmap.setPixels(info.bits);
234    } else {
235        // be safe with an empty bitmap.
236        bitmap.setPixels(NULL);
237    }
238
239    SkCanvas* nativeCanvas = SkNEW_ARGS(SkCanvas, (bitmap));
240    swapCanvasPtr(env, canvasObj, nativeCanvas);
241
242    SkRegion clipReg;
243    if (dirtyRegion.isRect()) { // very common case
244        const Rect b(dirtyRegion.getBounds());
245        clipReg.setRect(b.left, b.top, b.right, b.bottom);
246    } else {
247        size_t count;
248        Rect const* r = dirtyRegion.getArray(&count);
249        while (count) {
250            clipReg.op(r->left, r->top, r->right, r->bottom, SkRegion::kUnion_Op);
251            r++, count--;
252        }
253    }
254
255    nativeCanvas->clipRegion(clipReg);
256
257    if (dirtyRectObj) {
258        const Rect& bounds(dirtyRegion.getBounds());
259        env->SetIntField(dirtyRectObj, gRectClassInfo.left, bounds.left);
260        env->SetIntField(dirtyRectObj, gRectClassInfo.top, bounds.top);
261        env->SetIntField(dirtyRectObj, gRectClassInfo.right, bounds.right);
262        env->SetIntField(dirtyRectObj, gRectClassInfo.bottom, bounds.bottom);
263    }
264
265    return canvasObj;
266}
267
268static void nativeUnlockCanvasAndPost(JNIEnv* env, jobject surfaceObj, jint nativeObject, jobject canvasObj) {
269    jobject ownCanvasObj = env->GetObjectField(surfaceObj, gSurfaceClassInfo.mCanvas);
270    if (!env->IsSameObject(ownCanvasObj, canvasObj)) {
271        doThrowIAE(env);
272        return;
273    }
274
275    sp<Surface> surface(reinterpret_cast<Surface *>(nativeObject));
276    if (!Surface::isValid(surface)) {
277        return;
278    }
279
280    // detach the canvas from the surface
281    SkCanvas* nativeCanvas = SkNEW(SkCanvas);
282    swapCanvasPtr(env, canvasObj, nativeCanvas);
283
284    // unlock surface
285    status_t err = surface->unlockAndPost();
286    if (err < 0) {
287        doThrowIAE(env);
288    }
289}
290
291// ----------------------------------------------------------------------------
292
293static jint nativeCopyFrom(JNIEnv* env, jobject surfaceObj,
294        jint nativeObject, jint surfaceControlNativeObj) {
295    /*
296     * This is used by the WindowManagerService just after constructing
297     * a Surface and is necessary for returning the Surface reference to
298     * the caller. At this point, we should only have a SurfaceControl.
299     */
300
301    sp<SurfaceControl> ctrl(reinterpret_cast<SurfaceControl *>(surfaceControlNativeObj));
302    sp<Surface> other(ctrl->getSurface());
303    if (other != NULL) {
304        other->incStrong(surfaceObj);
305    }
306
307    sp<Surface> sur(reinterpret_cast<Surface *>(nativeObject));
308    if (sur != NULL) {
309        sur->decStrong(surfaceObj);
310    }
311
312    return int(other.get());
313}
314
315static jint nativeReadFromParcel(JNIEnv* env, jobject surfaceObj,
316        jint nativeObject, jobject parcelObj) {
317    Parcel* parcel = parcelForJavaObject(env, parcelObj);
318    if (parcel == NULL) {
319        doThrowNPE(env);
320        return 0;
321    }
322    sp<Surface> self(reinterpret_cast<Surface *>(nativeObject));
323    if (self != NULL) {
324        self->decStrong(surfaceObj);
325    }
326    sp<Surface> sur(Surface::readFromParcel(*parcel));
327    if (sur != NULL) {
328        sur->incStrong(surfaceObj);
329    }
330    return int(sur.get());
331}
332
333static void nativeWriteToParcel(JNIEnv* env, jobject surfaceObj,
334        jint nativeObject, jobject parcelObj) {
335    Parcel* parcel = parcelForJavaObject(env, parcelObj);
336    if (parcel == NULL) {
337        doThrowNPE(env);
338        return;
339    }
340    sp<Surface> self(reinterpret_cast<Surface *>(nativeObject));
341    Surface::writeToParcel(self, parcel);
342}
343
344// ----------------------------------------------------------------------------
345
346static JNINativeMethod gSurfaceMethods[] = {
347    {"nativeCreateFromSurfaceTexture", "(Landroid/graphics/SurfaceTexture;)I",
348            (void*)nativeCreateFromSurfaceTexture },
349    {"nativeRelease", "(I)V",
350            (void*)nativeRelease },
351    {"nativeDestroy", "(I)V",
352            (void*)nativeDestroy },
353    {"nativeIsValid", "(I)Z",
354            (void*)nativeIsValid },
355    {"nativeIsConsumerRunningBehind", "(I)Z",
356            (void*)nativeIsConsumerRunningBehind },
357    {"nativeLockCanvas", "(ILandroid/graphics/Rect;)Landroid/graphics/Canvas;",
358            (void*)nativeLockCanvas },
359    {"nativeUnlockCanvasAndPost", "(ILandroid/graphics/Canvas;)V",
360            (void*)nativeUnlockCanvasAndPost },
361    {"nativeCopyFrom", "(II)I",
362            (void*)nativeCopyFrom },
363    {"nativeReadFromParcel", "(ILandroid/os/Parcel;)I",
364            (void*)nativeReadFromParcel },
365    {"nativeWriteToParcel", "(ILandroid/os/Parcel;)V",
366            (void*)nativeWriteToParcel },
367};
368
369int register_android_view_Surface(JNIEnv* env)
370{
371    int err = AndroidRuntime::registerNativeMethods(env, "android/view/Surface",
372            gSurfaceMethods, NELEM(gSurfaceMethods));
373
374    jclass clazz = env->FindClass("android/view/Surface");
375    gSurfaceClassInfo.clazz = jclass(env->NewGlobalRef(clazz));
376    gSurfaceClassInfo.mNativeObject =
377            env->GetFieldID(gSurfaceClassInfo.clazz, "mNativeObject", "I");
378    gSurfaceClassInfo.mGenerationId =
379            env->GetFieldID(gSurfaceClassInfo.clazz, "mGenerationId", "I");
380    gSurfaceClassInfo.mCanvas =
381            env->GetFieldID(gSurfaceClassInfo.clazz, "mCanvas", "Landroid/graphics/Canvas;");
382    gSurfaceClassInfo.ctor = env->GetMethodID(gSurfaceClassInfo.clazz, "<init>", "()V");
383
384    clazz = env->FindClass("android/graphics/Canvas");
385    gCanvasClassInfo.mFinalizer = env->GetFieldID(clazz, "mFinalizer", "Landroid/graphics/Canvas$CanvasFinalizer;");
386    gCanvasClassInfo.mNativeCanvas = env->GetFieldID(clazz, "mNativeCanvas", "I");
387    gCanvasClassInfo.mSurfaceFormat = env->GetFieldID(clazz, "mSurfaceFormat", "I");
388
389    clazz = env->FindClass("android/graphics/Canvas$CanvasFinalizer");
390    gCanvasFinalizerClassInfo.mNativeCanvas = env->GetFieldID(clazz, "mNativeCanvas", "I");
391
392    clazz = env->FindClass("android/graphics/Rect");
393    gRectClassInfo.left = env->GetFieldID(clazz, "left", "I");
394    gRectClassInfo.top = env->GetFieldID(clazz, "top", "I");
395    gRectClassInfo.right = env->GetFieldID(clazz, "right", "I");
396    gRectClassInfo.bottom = env->GetFieldID(clazz, "bottom", "I");
397
398    return err;
399}
400
401};
402