android_view_Surface.cpp revision 8b138323d54e36fd66b22a634494648e20c53373 
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#include <stdio.h>
18
19#include "android_util_Binder.h"
20
21#include <surfaceflinger/SurfaceComposerClient.h>
22#include <surfaceflinger/Surface.h>
23#include <ui/Region.h>
24#include <ui/Rect.h>
25
26#include <SkCanvas.h>
27#include <SkBitmap.h>
28#include <SkRegion.h>
29
30#include "jni.h"
31#include <android_runtime/AndroidRuntime.h>
32#include <utils/misc.h>
33
34
35// ----------------------------------------------------------------------------
36
37namespace android {
38
39enum {
40    // should match Parcelable.java
41    PARCELABLE_WRITE_RETURN_VALUE = 0x0001
42};
43
44// ----------------------------------------------------------------------------
45
46static const char* const OutOfResourcesException =
47    "android/view/Surface$OutOfResourcesException";
48
49struct sso_t {
50    jfieldID client;
51};
52static sso_t sso;
53
54struct so_t {
55    jfieldID surfaceControl;
56    jfieldID surface;
57    jfieldID saveCount;
58    jfieldID canvas;
59};
60static so_t so;
61
62struct ro_t {
63    jfieldID l;
64    jfieldID t;
65    jfieldID r;
66    jfieldID b;
67};
68static ro_t ro;
69
70struct po_t {
71    jfieldID x;
72    jfieldID y;
73};
74static po_t po;
75
76struct co_t {
77    jfieldID surfaceFormat;
78};
79static co_t co;
80
81struct no_t {
82    jfieldID native_canvas;
83    jfieldID native_region;
84    jfieldID native_parcel;
85};
86static no_t no;
87
88
89static __attribute__((noinline))
90void doThrow(JNIEnv* env, const char* exc, const char* msg = NULL)
91{
92    if (!env->ExceptionOccurred()) {
93        jclass npeClazz = env->FindClass(exc);
94        env->ThrowNew(npeClazz, msg);
95    }
96}
97
98// ----------------------------------------------------------------------------
99// ----------------------------------------------------------------------------
100// ----------------------------------------------------------------------------
101
102static void SurfaceSession_init(JNIEnv* env, jobject clazz)
103{
104    sp<SurfaceComposerClient> client = new SurfaceComposerClient;
105    client->incStrong(clazz);
106    env->SetIntField(clazz, sso.client, (int)client.get());
107}
108
109static void SurfaceSession_destroy(JNIEnv* env, jobject clazz)
110{
111    SurfaceComposerClient* client =
112            (SurfaceComposerClient*)env->GetIntField(clazz, sso.client);
113    if (client != 0) {
114        client->decStrong(clazz);
115        env->SetIntField(clazz, sso.client, 0);
116    }
117}
118
119static void SurfaceSession_kill(JNIEnv* env, jobject clazz)
120{
121    SurfaceComposerClient* client =
122            (SurfaceComposerClient*)env->GetIntField(clazz, sso.client);
123    if (client != 0) {
124        client->dispose();
125        client->decStrong(clazz);
126        env->SetIntField(clazz, sso.client, 0);
127    }
128}
129
130// ----------------------------------------------------------------------------
131
132static sp<SurfaceControl> getSurfaceControl(JNIEnv* env, jobject clazz)
133{
134    SurfaceControl* const p =
135        (SurfaceControl*)env->GetIntField(clazz, so.surfaceControl);
136    return sp<SurfaceControl>(p);
137}
138
139static void setSurfaceControl(JNIEnv* env, jobject clazz,
140        const sp<SurfaceControl>& surface)
141{
142    SurfaceControl* const p =
143        (SurfaceControl*)env->GetIntField(clazz, so.surfaceControl);
144    if (surface.get()) {
145        surface->incStrong(clazz);
146    }
147    if (p) {
148        p->decStrong(clazz);
149    }
150    env->SetIntField(clazz, so.surfaceControl, (int)surface.get());
151}
152
153static sp<Surface> getSurface(JNIEnv* env, jobject clazz)
154{
155    sp<Surface> result((Surface*)env->GetIntField(clazz, so.surface));
156    if (result == 0) {
157        /*
158         * if this method is called from the WindowManager's process, it means
159         * the client is is not remote, and therefore is allowed to have
160         * a Surface (data), so we create it here.
161         * If we don't have a SurfaceControl, it means we're in a different
162         * process.
163         */
164
165        SurfaceControl* const control =
166            (SurfaceControl*)env->GetIntField(clazz, so.surfaceControl);
167        if (control) {
168            result = control->getSurface();
169            if (result != 0) {
170                result->incStrong(clazz);
171                env->SetIntField(clazz, so.surface, (int)result.get());
172            }
173        }
174    }
175    return result;
176}
177
178static void setSurface(JNIEnv* env, jobject clazz, const sp<Surface>& surface)
179{
180    Surface* const p = (Surface*)env->GetIntField(clazz, so.surface);
181    if (surface.get()) {
182        surface->incStrong(clazz);
183    }
184    if (p) {
185        p->decStrong(clazz);
186    }
187    env->SetIntField(clazz, so.surface, (int)surface.get());
188}
189
190// ----------------------------------------------------------------------------
191
192static void Surface_init(
193        JNIEnv* env, jobject clazz,
194        jobject session,
195        jint pid, jstring jname, jint dpy, jint w, jint h, jint format, jint flags)
196{
197    if (session == NULL) {
198        doThrow(env, "java/lang/NullPointerException");
199        return;
200    }
201
202    SurfaceComposerClient* client =
203            (SurfaceComposerClient*)env->GetIntField(session, sso.client);
204
205    sp<SurfaceControl> surface;
206    if (jname == NULL) {
207        surface = client->createSurface(pid, dpy, w, h, format, flags);
208    } else {
209        const jchar* str = env->GetStringCritical(jname, 0);
210        const String8 name(str, env->GetStringLength(jname));
211        env->ReleaseStringCritical(jname, str);
212        surface = client->createSurface(pid, name, dpy, w, h, format, flags);
213    }
214
215    if (surface == 0) {
216        doThrow(env, OutOfResourcesException);
217        return;
218    }
219    setSurfaceControl(env, clazz, surface);
220}
221
222static void Surface_initParcel(JNIEnv* env, jobject clazz, jobject argParcel)
223{
224    Parcel* parcel = (Parcel*)env->GetIntField(argParcel, no.native_parcel);
225    if (parcel == NULL) {
226        doThrow(env, "java/lang/NullPointerException", NULL);
227        return;
228    }
229    sp<Surface> rhs = new Surface(*parcel);
230    setSurface(env, clazz, rhs);
231}
232
233static void Surface_destroy(JNIEnv* env, jobject clazz, uintptr_t *ostack)
234{
235    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
236    if (SurfaceControl::isValid(surface)) {
237        surface->clear();
238    }
239    setSurfaceControl(env, clazz, 0);
240    setSurface(env, clazz, 0);
241}
242
243static void Surface_release(JNIEnv* env, jobject clazz, uintptr_t *ostack)
244{
245    setSurfaceControl(env, clazz, 0);
246    setSurface(env, clazz, 0);
247}
248
249static jboolean Surface_isValid(JNIEnv* env, jobject clazz)
250{
251    const sp<SurfaceControl>& surfaceControl(getSurfaceControl(env, clazz));
252    if (surfaceControl != 0) {
253        return SurfaceControl::isValid(surfaceControl) ? JNI_TRUE : JNI_FALSE;
254    }
255    const sp<Surface>& surface(getSurface(env, clazz));
256    return Surface::isValid(surface) ? JNI_TRUE : JNI_FALSE;
257}
258
259static inline SkBitmap::Config convertPixelFormat(PixelFormat format)
260{
261    /* note: if PIXEL_FORMAT_RGBX_8888 means that all alpha bytes are 0xFF, then
262        we can map to SkBitmap::kARGB_8888_Config, and optionally call
263        bitmap.setIsOpaque(true) on the resulting SkBitmap (as an accelerator)
264    */
265	switch (format) {
266	case PIXEL_FORMAT_RGBX_8888:    return SkBitmap::kARGB_8888_Config;
267    case PIXEL_FORMAT_RGBA_8888:    return SkBitmap::kARGB_8888_Config;
268    case PIXEL_FORMAT_RGBA_4444:    return SkBitmap::kARGB_4444_Config;
269	case PIXEL_FORMAT_RGB_565:		return SkBitmap::kRGB_565_Config;
270	case PIXEL_FORMAT_A_8:          return SkBitmap::kA8_Config;
271	default:                        return SkBitmap::kNo_Config;
272	}
273}
274
275static jobject Surface_lockCanvas(JNIEnv* env, jobject clazz, jobject dirtyRect)
276{
277    const sp<Surface>& surface(getSurface(env, clazz));
278    if (!Surface::isValid(surface))
279        return 0;
280
281    // get dirty region
282    Region dirtyRegion;
283    if (dirtyRect) {
284        Rect dirty;
285        dirty.left  = env->GetIntField(dirtyRect, ro.l);
286        dirty.top   = env->GetIntField(dirtyRect, ro.t);
287        dirty.right = env->GetIntField(dirtyRect, ro.r);
288        dirty.bottom= env->GetIntField(dirtyRect, ro.b);
289        if (!dirty.isEmpty()) {
290            dirtyRegion.set(dirty);
291        }
292    } else {
293        dirtyRegion.set(Rect(0x3FFF,0x3FFF));
294    }
295
296    Surface::SurfaceInfo info;
297    status_t err = surface->lock(&info, &dirtyRegion);
298    if (err < 0) {
299        const char* const exception = (err == NO_MEMORY) ?
300            OutOfResourcesException :
301            "java/lang/IllegalArgumentException";
302        doThrow(env, exception, NULL);
303        return 0;
304    }
305
306    // Associate a SkCanvas object to this surface
307    jobject canvas = env->GetObjectField(clazz, so.canvas);
308    env->SetIntField(canvas, co.surfaceFormat, info.format);
309
310    SkCanvas* nativeCanvas = (SkCanvas*)env->GetIntField(canvas, no.native_canvas);
311    SkBitmap bitmap;
312    ssize_t bpr = info.s * bytesPerPixel(info.format);
313    bitmap.setConfig(convertPixelFormat(info.format), info.w, info.h, bpr);
314    if (info.format == PIXEL_FORMAT_RGBX_8888) {
315        bitmap.setIsOpaque(true);
316    }
317    if (info.w > 0 && info.h > 0) {
318        bitmap.setPixels(info.bits);
319    } else {
320        // be safe with an empty bitmap.
321        bitmap.setPixels(NULL);
322    }
323    nativeCanvas->setBitmapDevice(bitmap);
324
325    SkRegion clipReg;
326    if (dirtyRegion.isRect()) { // very common case
327        const Rect& b(dirtyRegion.getBounds());
328        clipReg.setRect(b.left, b.top, b.right, b.bottom);
329    } else {
330        size_t count;
331        Rect const* r = dirtyRegion.getArray(&count);
332        while (count) {
333            clipReg.op(r->left, r->top, r->right, r->bottom, SkRegion::kUnion_Op);
334            r++, count--;
335        }
336    }
337
338    nativeCanvas->clipRegion(clipReg);
339
340    int saveCount = nativeCanvas->save();
341    env->SetIntField(clazz, so.saveCount, saveCount);
342
343    if (dirtyRect) {
344        const Rect& bounds(dirtyRegion.getBounds());
345        env->SetIntField(dirtyRect, ro.l, bounds.left);
346        env->SetIntField(dirtyRect, ro.t, bounds.top);
347        env->SetIntField(dirtyRect, ro.r, bounds.right);
348        env->SetIntField(dirtyRect, ro.b, bounds.bottom);
349    }
350
351	return canvas;
352}
353
354static void Surface_unlockCanvasAndPost(
355        JNIEnv* env, jobject clazz, jobject argCanvas)
356{
357    jobject canvas = env->GetObjectField(clazz, so.canvas);
358    if (canvas != argCanvas) {
359        doThrow(env, "java/lang/IllegalArgumentException", NULL);
360        return;
361    }
362
363    const sp<Surface>& surface(getSurface(env, clazz));
364    if (!Surface::isValid(surface))
365        return;
366
367    // detach the canvas from the surface
368    SkCanvas* nativeCanvas = (SkCanvas*)env->GetIntField(canvas, no.native_canvas);
369    int saveCount = env->GetIntField(clazz, so.saveCount);
370    nativeCanvas->restoreToCount(saveCount);
371    nativeCanvas->setBitmapDevice(SkBitmap());
372    env->SetIntField(clazz, so.saveCount, 0);
373
374    // unlock surface
375    status_t err = surface->unlockAndPost();
376    if (err < 0) {
377        doThrow(env, "java/lang/IllegalArgumentException", NULL);
378    }
379}
380
381static void Surface_unlockCanvas(
382        JNIEnv* env, jobject clazz, jobject argCanvas)
383{
384    // XXX: this API has been removed
385    doThrow(env, "java/lang/IllegalArgumentException", NULL);
386}
387
388static void Surface_openTransaction(
389        JNIEnv* env, jobject clazz)
390{
391    SurfaceComposerClient::openGlobalTransaction();
392}
393
394static void Surface_closeTransaction(
395        JNIEnv* env, jobject clazz)
396{
397    SurfaceComposerClient::closeGlobalTransaction();
398}
399
400static void Surface_setOrientation(
401        JNIEnv* env, jobject clazz, jint display, jint orientation, jint flags)
402{
403    int err = SurfaceComposerClient::setOrientation(display, orientation, flags);
404    if (err < 0) {
405        doThrow(env, "java/lang/IllegalArgumentException", NULL);
406    }
407}
408
409static void Surface_freezeDisplay(
410        JNIEnv* env, jobject clazz, jint display)
411{
412    int err = SurfaceComposerClient::freezeDisplay(display, 0);
413    if (err < 0) {
414        doThrow(env, "java/lang/IllegalArgumentException", NULL);
415    }
416}
417
418static void Surface_unfreezeDisplay(
419        JNIEnv* env, jobject clazz, jint display)
420{
421    int err = SurfaceComposerClient::unfreezeDisplay(display, 0);
422    if (err < 0) {
423        doThrow(env, "java/lang/IllegalArgumentException", NULL);
424    }
425}
426
427static void Surface_setLayer(
428        JNIEnv* env, jobject clazz, jint zorder)
429{
430    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
431    if (surface == 0) return;
432    status_t err = surface->setLayer(zorder);
433    if (err<0 && err!=NO_INIT)
434        doThrow(env, "java/lang/IllegalArgumentException", NULL);
435}
436
437static void Surface_setPosition(
438        JNIEnv* env, jobject clazz, jint x, jint y)
439{
440    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
441    if (surface == 0) return;
442    status_t err = surface->setPosition(x, y);
443    if (err<0 && err!=NO_INIT)
444        doThrow(env, "java/lang/IllegalArgumentException", NULL);
445}
446
447static void Surface_setSize(
448        JNIEnv* env, jobject clazz, jint w, jint h)
449{
450    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
451    if (surface == 0) return;
452    status_t err = surface->setSize(w, h);
453    if (err<0 && err!=NO_INIT)
454        doThrow(env, "java/lang/IllegalArgumentException", NULL);
455}
456
457static void Surface_hide(
458        JNIEnv* env, jobject clazz)
459{
460    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
461    if (surface == 0) return;
462    status_t err = surface->hide();
463    if (err<0 && err!=NO_INIT)
464        doThrow(env, "java/lang/IllegalArgumentException", NULL);
465}
466
467static void Surface_show(
468        JNIEnv* env, jobject clazz)
469{
470    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
471    if (surface == 0) return;
472    status_t err = surface->show();
473    if (err<0 && err!=NO_INIT)
474        doThrow(env, "java/lang/IllegalArgumentException", NULL);
475}
476
477static void Surface_freeze(
478        JNIEnv* env, jobject clazz)
479{
480    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
481    if (surface == 0) return;
482    status_t err = surface->freeze();
483    if (err<0 && err!=NO_INIT)
484        doThrow(env, "java/lang/IllegalArgumentException", NULL);
485}
486
487static void Surface_unfreeze(
488        JNIEnv* env, jobject clazz)
489{
490    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
491    if (surface == 0) return;
492    status_t err = surface->unfreeze();
493    if (err<0 && err!=NO_INIT)
494        doThrow(env, "java/lang/IllegalArgumentException", NULL);
495}
496
497static void Surface_setFlags(
498        JNIEnv* env, jobject clazz, jint flags, jint mask)
499{
500    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
501    if (surface == 0) return;
502    status_t err = surface->setFlags(flags, mask);
503    if (err<0 && err!=NO_INIT)
504        doThrow(env, "java/lang/IllegalArgumentException", NULL);
505}
506
507static void Surface_setTransparentRegion(
508        JNIEnv* env, jobject clazz, jobject argRegion)
509{
510    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
511    if (surface == 0) return;
512    SkRegion* nativeRegion = (SkRegion*)env->GetIntField(argRegion, no.native_region);
513
514    const SkIRect& b(nativeRegion->getBounds());
515    Region reg(Rect(b.fLeft, b.fTop, b.fRight, b.fBottom));
516    if (nativeRegion->isComplex()) {
517        SkRegion::Iterator it(*nativeRegion);
518        while (!it.done()) {
519            const SkIRect& r(it.rect());
520            reg.addRectUnchecked(r.fLeft, r.fTop, r.fRight, r.fBottom);
521            it.next();
522        }
523    }
524
525    status_t err = surface->setTransparentRegionHint(reg);
526    if (err<0 && err!=NO_INIT)
527        doThrow(env, "java/lang/IllegalArgumentException", NULL);
528}
529
530static void Surface_setAlpha(
531        JNIEnv* env, jobject clazz, jfloat alpha)
532{
533    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
534    if (surface == 0) return;
535    status_t err = surface->setAlpha(alpha);
536    if (err<0 && err!=NO_INIT)
537        doThrow(env, "java/lang/IllegalArgumentException", NULL);
538}
539
540static void Surface_setMatrix(
541        JNIEnv* env, jobject clazz,
542        jfloat dsdx, jfloat dtdx, jfloat dsdy, jfloat dtdy)
543{
544    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
545    if (surface == 0) return;
546    status_t err = surface->setMatrix(dsdx, dtdx, dsdy, dtdy);
547    if (err<0 && err!=NO_INIT)
548        doThrow(env, "java/lang/IllegalArgumentException", NULL);
549}
550
551static void Surface_setFreezeTint(
552        JNIEnv* env, jobject clazz,
553        jint tint)
554{
555    const sp<SurfaceControl>& surface(getSurfaceControl(env, clazz));
556    if (surface == 0) return;
557    status_t err = surface->setFreezeTint(tint);
558    if (err<0 && err!=NO_INIT)
559        doThrow(env, "java/lang/IllegalArgumentException", NULL);
560}
561
562// ----------------------------------------------------------------------------
563
564static void Surface_copyFrom(
565        JNIEnv* env, jobject clazz, jobject other)
566{
567    if (clazz == other)
568        return;
569
570    if (other == NULL) {
571        doThrow(env, "java/lang/NullPointerException", NULL);
572        return;
573    }
574
575    /*
576     * This is used by the WindowManagerService just after constructing
577     * a Surface and is necessary for returning the Surface reference to
578     * the caller. At this point, we should only have a SurfaceControl.
579     */
580
581    const sp<SurfaceControl>& surface = getSurfaceControl(env, clazz);
582    const sp<SurfaceControl>& rhs = getSurfaceControl(env, other);
583    if (!SurfaceControl::isSameSurface(surface, rhs)) {
584        // we reassign the surface only if it's a different one
585        // otherwise we would loose our client-side state.
586        setSurfaceControl(env, clazz, rhs);
587    }
588}
589
590static void Surface_readFromParcel(
591        JNIEnv* env, jobject clazz, jobject argParcel)
592{
593    Parcel* parcel = (Parcel*)env->GetIntField( argParcel, no.native_parcel);
594    if (parcel == NULL) {
595        doThrow(env, "java/lang/NullPointerException", NULL);
596        return;
597    }
598
599    const sp<Surface>& control(getSurface(env, clazz));
600    sp<Surface> rhs = new Surface(*parcel);
601    if (!Surface::isSameSurface(control, rhs)) {
602        // we reassign the surface only if it's a different one
603        // otherwise we would loose our client-side state.
604        setSurface(env, clazz, rhs);
605    }
606}
607
608static void Surface_writeToParcel(
609        JNIEnv* env, jobject clazz, jobject argParcel, jint flags)
610{
611    Parcel* parcel = (Parcel*)env->GetIntField(
612            argParcel, no.native_parcel);
613
614    if (parcel == NULL) {
615        doThrow(env, "java/lang/NullPointerException", NULL);
616        return;
617    }
618
619    const sp<SurfaceControl>& control(getSurfaceControl(env, clazz));
620    SurfaceControl::writeSurfaceToParcel(control, parcel);
621    if (flags & PARCELABLE_WRITE_RETURN_VALUE) {
622        setSurfaceControl(env, clazz, 0);
623    }
624}
625
626// ----------------------------------------------------------------------------
627// ----------------------------------------------------------------------------
628// ----------------------------------------------------------------------------
629
630const char* const kSurfaceSessionClassPathName = "android/view/SurfaceSession";
631const char* const kSurfaceClassPathName = "android/view/Surface";
632static void nativeClassInit(JNIEnv* env, jclass clazz);
633
634static JNINativeMethod gSurfaceSessionMethods[] = {
635	{"init",     "()V",  (void*)SurfaceSession_init },
636	{"destroy",  "()V",  (void*)SurfaceSession_destroy },
637    {"kill",     "()V",  (void*)SurfaceSession_kill },
638};
639
640static JNINativeMethod gSurfaceMethods[] = {
641    {"nativeClassInit",     "()V",  (void*)nativeClassInit },
642    {"init",                "(Landroid/view/SurfaceSession;ILjava/lang/String;IIIII)V",  (void*)Surface_init },
643    {"init",                "(Landroid/os/Parcel;)V",  (void*)Surface_initParcel },
644    {"destroy",             "()V",  (void*)Surface_destroy },
645    {"release",             "()V",  (void*)Surface_release },
646	{"copyFrom",            "(Landroid/view/Surface;)V",  (void*)Surface_copyFrom },
647	{"isValid",             "()Z",  (void*)Surface_isValid },
648	{"lockCanvasNative",    "(Landroid/graphics/Rect;)Landroid/graphics/Canvas;",  (void*)Surface_lockCanvas },
649	{"unlockCanvasAndPost", "(Landroid/graphics/Canvas;)V", (void*)Surface_unlockCanvasAndPost },
650	{"unlockCanvas",        "(Landroid/graphics/Canvas;)V", (void*)Surface_unlockCanvas },
651	{"openTransaction",     "()V",  (void*)Surface_openTransaction },
652    {"closeTransaction",    "()V",  (void*)Surface_closeTransaction },
653    {"setOrientation",      "(III)V", (void*)Surface_setOrientation },
654    {"freezeDisplay",       "(I)V", (void*)Surface_freezeDisplay },
655    {"unfreezeDisplay",     "(I)V", (void*)Surface_unfreezeDisplay },
656    {"setLayer",            "(I)V", (void*)Surface_setLayer },
657	{"setPosition",         "(II)V",(void*)Surface_setPosition },
658	{"setSize",             "(II)V",(void*)Surface_setSize },
659	{"hide",                "()V",  (void*)Surface_hide },
660	{"show",                "()V",  (void*)Surface_show },
661	{"freeze",              "()V",  (void*)Surface_freeze },
662	{"unfreeze",            "()V",  (void*)Surface_unfreeze },
663	{"setFlags",            "(II)V",(void*)Surface_setFlags },
664	{"setTransparentRegionHint","(Landroid/graphics/Region;)V", (void*)Surface_setTransparentRegion },
665	{"setAlpha",            "(F)V", (void*)Surface_setAlpha },
666	{"setMatrix",           "(FFFF)V",  (void*)Surface_setMatrix },
667	{"setFreezeTint",       "(I)V",  (void*)Surface_setFreezeTint },
668	{"readFromParcel",      "(Landroid/os/Parcel;)V", (void*)Surface_readFromParcel },
669	{"writeToParcel",       "(Landroid/os/Parcel;I)V", (void*)Surface_writeToParcel },
670};
671
672void nativeClassInit(JNIEnv* env, jclass clazz)
673{
674    so.surface = env->GetFieldID(clazz, ANDROID_VIEW_SURFACE_JNI_ID, "I");
675    so.surfaceControl = env->GetFieldID(clazz, "mSurfaceControl", "I");
676	so.saveCount = env->GetFieldID(clazz, "mSaveCount", "I");
677	so.canvas    = env->GetFieldID(clazz, "mCanvas", "Landroid/graphics/Canvas;");
678
679    jclass surfaceSession = env->FindClass("android/view/SurfaceSession");
680 	sso.client = env->GetFieldID(surfaceSession, "mClient", "I");
681
682    jclass canvas = env->FindClass("android/graphics/Canvas");
683    no.native_canvas = env->GetFieldID(canvas, "mNativeCanvas", "I");
684    co.surfaceFormat = env->GetFieldID(canvas, "mSurfaceFormat", "I");
685
686    jclass region = env->FindClass("android/graphics/Region");
687    no.native_region = env->GetFieldID(region, "mNativeRegion", "I");
688
689    jclass parcel = env->FindClass("android/os/Parcel");
690    no.native_parcel = env->GetFieldID(parcel, "mObject", "I");
691
692    jclass rect = env->FindClass("android/graphics/Rect");
693    ro.l = env->GetFieldID(rect, "left", "I");
694    ro.t = env->GetFieldID(rect, "top", "I");
695    ro.r = env->GetFieldID(rect, "right", "I");
696    ro.b = env->GetFieldID(rect, "bottom", "I");
697
698    jclass point = env->FindClass("android/graphics/Point");
699    po.x = env->GetFieldID(point, "x", "I");
700    po.y = env->GetFieldID(point, "y", "I");
701}
702
703int register_android_view_Surface(JNIEnv* env)
704{
705    int err;
706    err = AndroidRuntime::registerNativeMethods(env, kSurfaceSessionClassPathName,
707            gSurfaceSessionMethods, NELEM(gSurfaceSessionMethods));
708
709    err |= AndroidRuntime::registerNativeMethods(env, kSurfaceClassPathName,
710            gSurfaceMethods, NELEM(gSurfaceMethods));
711    return err;
712}
713
714};
715
716