android_view_GLES20Canvas.cpp revision ba6be8a62dcdb3ffd210cd36b9af4e3a658eac47 
1/*
2 * Copyright (C) 2010 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 "OpenGLRenderer"
18
19#include <EGL/egl.h>
20
21#include "jni.h"
22#include "GraphicsJNI.h"
23#include <nativehelper/JNIHelp.h>
24
25#include <android_runtime/AndroidRuntime.h>
26#include <android_runtime/android_graphics_SurfaceTexture.h>
27#include <gui/SurfaceTexture.h>
28
29#include <androidfw/ResourceTypes.h>
30
31#include <private/hwui/DrawGlInfo.h>
32
33#include <cutils/properties.h>
34
35#include <SkBitmap.h>
36#include <SkCanvas.h>
37#include <SkMatrix.h>
38#include <SkPaint.h>
39#include <SkRegion.h>
40#include <SkScalerContext.h>
41#include <SkTemplates.h>
42#include <SkXfermode.h>
43
44#include <DisplayListRenderer.h>
45#include <LayerRenderer.h>
46#include <OpenGLRenderer.h>
47#include <SkiaShader.h>
48#include <SkiaColorFilter.h>
49#include <Rect.h>
50
51#include <TextLayout.h>
52#include <TextLayoutCache.h>
53
54namespace android {
55
56using namespace uirenderer;
57
58/**
59 * Note: OpenGLRenderer JNI layer is generated and compiled only on supported
60 *       devices. This means all the logic must be compiled only when the
61 *       preprocessor variable USE_OPENGL_RENDERER is defined.
62 */
63#ifdef USE_OPENGL_RENDERER
64
65// ----------------------------------------------------------------------------
66// Defines
67// ----------------------------------------------------------------------------
68
69// Debug
70#define DEBUG_RENDERER 0
71
72// Debug
73#if DEBUG_RENDERER
74    #define RENDERER_LOGD(...) ALOGD(__VA_ARGS__)
75#else
76    #define RENDERER_LOGD(...)
77#endif
78
79#define MODIFIER_SHADOW 1
80#define MODIFIER_SHADER 2
81#define MODIFIER_COLOR_FILTER 4
82
83// ----------------------------------------------------------------------------
84
85static struct {
86    jmethodID set;
87} gRectClassInfo;
88
89// ----------------------------------------------------------------------------
90// Caching
91// ----------------------------------------------------------------------------
92
93static void android_view_GLES20Canvas_flushCaches(JNIEnv* env, jobject clazz,
94        Caches::FlushMode mode) {
95    if (Caches::hasInstance()) {
96        Caches::getInstance().flush(mode);
97    }
98}
99
100static void android_view_GLES20Canvas_initCaches(JNIEnv* env, jobject clazz) {
101    if (Caches::hasInstance()) {
102        Caches::getInstance().init();
103    }
104}
105
106static void android_view_GLES20Canvas_terminateCaches(JNIEnv* env, jobject clazz) {
107    if (Caches::hasInstance()) {
108        Caches::getInstance().terminate();
109    }
110}
111
112// ----------------------------------------------------------------------------
113// Constructors
114// ----------------------------------------------------------------------------
115
116static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject clazz) {
117    RENDERER_LOGD("Create OpenGLRenderer");
118    return new OpenGLRenderer;
119}
120
121static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject clazz,
122        OpenGLRenderer* renderer) {
123    RENDERER_LOGD("Destroy OpenGLRenderer");
124    delete renderer;
125}
126
127// ----------------------------------------------------------------------------
128// Setup
129// ----------------------------------------------------------------------------
130
131static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject clazz,
132        OpenGLRenderer* renderer, jint width, jint height) {
133    renderer->setViewport(width, height);
134}
135
136static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject clazz,
137        OpenGLRenderer* renderer, jboolean opaque) {
138    renderer->prepare(opaque);
139}
140
141static void android_view_GLES20Canvas_prepareDirty(JNIEnv* env, jobject clazz,
142        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
143        jboolean opaque) {
144    renderer->prepareDirty(left, top, right, bottom, opaque);
145}
146
147static void android_view_GLES20Canvas_finish(JNIEnv* env, jobject clazz,
148        OpenGLRenderer* renderer) {
149    renderer->finish();
150}
151
152static jint android_view_GLES20Canvas_getStencilSize(JNIEnv* env, jobject clazz) {
153    return OpenGLRenderer::getStencilSize();
154}
155
156// ----------------------------------------------------------------------------
157// Functor
158// ----------------------------------------------------------------------------
159
160static jint android_view_GLES20Canvas_callDrawGLFunction(JNIEnv* env, jobject clazz,
161        OpenGLRenderer* renderer, Functor* functor) {
162    android::uirenderer::Rect dirty;
163    return renderer->callDrawGLFunction(functor, dirty);
164}
165
166static void android_view_GLES20Canvas_detachFunctor(JNIEnv* env,
167        jobject clazz, OpenGLRenderer* renderer, Functor* functor) {
168    renderer->detachFunctor(functor);
169}
170
171static void android_view_GLES20Canvas_attachFunctor(JNIEnv* env,
172        jobject clazz, OpenGLRenderer* renderer, Functor* functor) {
173    renderer->attachFunctor(functor);
174}
175
176static jint android_view_GLES20Canvas_invokeFunctors(JNIEnv* env,
177        jobject clazz, OpenGLRenderer* renderer, jobject dirty) {
178    android::uirenderer::Rect bounds;
179    status_t status = renderer->invokeFunctors(bounds);
180    if (status != DrawGlInfo::kStatusDone && dirty != NULL) {
181        env->CallVoidMethod(dirty, gRectClassInfo.set,
182                int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
183    }
184    return status;
185}
186
187// ----------------------------------------------------------------------------
188// Misc
189// ----------------------------------------------------------------------------
190
191static jint android_view_GLES20Canvas_getMaxTextureWidth(JNIEnv* env, jobject clazz) {
192    return Caches::getInstance().maxTextureSize;
193}
194
195static jint android_view_GLES20Canvas_getMaxTextureHeight(JNIEnv* env, jobject clazz) {
196    return Caches::getInstance().maxTextureSize;
197}
198
199// ----------------------------------------------------------------------------
200// State
201// ----------------------------------------------------------------------------
202
203static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject clazz, OpenGLRenderer* renderer,
204        jint flags) {
205    return renderer->save(flags);
206}
207
208static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject clazz,
209        OpenGLRenderer* renderer) {
210    return renderer->getSaveCount();
211}
212
213static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject clazz,
214        OpenGLRenderer* renderer) {
215    renderer->restore();
216}
217
218static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject clazz,
219        OpenGLRenderer* renderer, jint saveCount) {
220    renderer->restoreToCount(saveCount);
221}
222
223// ----------------------------------------------------------------------------
224// Layers
225// ----------------------------------------------------------------------------
226
227static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject clazz,
228        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
229        SkPaint* paint, jint saveFlags) {
230    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
231}
232
233static jint android_view_GLES20Canvas_saveLayerClip(JNIEnv* env, jobject clazz,
234        OpenGLRenderer* renderer, SkPaint* paint, jint saveFlags) {
235    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
236    return renderer->saveLayer(bounds.left, bounds.top, bounds.right, bounds.bottom,
237            paint, saveFlags);
238}
239
240static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject clazz,
241        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
242        jint alpha, jint saveFlags) {
243    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
244}
245
246static jint android_view_GLES20Canvas_saveLayerAlphaClip(JNIEnv* env, jobject clazz,
247        OpenGLRenderer* renderer, jint alpha, jint saveFlags) {
248    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
249    return renderer->saveLayerAlpha(bounds.left, bounds.top, bounds.right, bounds.bottom,
250            alpha, saveFlags);
251}
252
253// ----------------------------------------------------------------------------
254// Clipping
255// ----------------------------------------------------------------------------
256
257static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject clazz,
258        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
259        SkCanvas::EdgeType edge) {
260    return renderer->quickReject(left, top, right, bottom);
261}
262
263static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject clazz,
264        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
265        SkRegion::Op op) {
266    return renderer->clipRect(left, top, right, bottom, op);
267}
268
269static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject clazz,
270        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
271        SkRegion::Op op) {
272    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
273}
274
275static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject clazz,
276        OpenGLRenderer* renderer, jobject rect) {
277    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
278
279    env->CallVoidMethod(rect, gRectClassInfo.set,
280            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
281
282    return !bounds.isEmpty();
283}
284
285// ----------------------------------------------------------------------------
286// Transforms
287// ----------------------------------------------------------------------------
288
289static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject clazz,
290        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
291    renderer->translate(dx, dy);
292}
293
294static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject clazz,
295        OpenGLRenderer* renderer, jfloat degrees) {
296    renderer->rotate(degrees);
297}
298
299static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject clazz,
300        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
301    renderer->scale(sx, sy);
302}
303
304static void android_view_GLES20Canvas_skew(JNIEnv* env, jobject clazz,
305        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
306    renderer->skew(sx, sy);
307}
308
309static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject clazz,
310        OpenGLRenderer* renderer, SkMatrix* matrix) {
311    renderer->setMatrix(matrix);
312}
313
314static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject clazz,
315        OpenGLRenderer* renderer, SkMatrix* matrix) {
316    renderer->getMatrix(matrix);
317}
318
319static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject clazz,
320        OpenGLRenderer* renderer, SkMatrix* matrix) {
321    renderer->concatMatrix(matrix);
322}
323
324// ----------------------------------------------------------------------------
325// Drawing
326// ----------------------------------------------------------------------------
327
328static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject clazz,
329        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer, float left,
330        float top, SkPaint* paint) {
331    // This object allows the renderer to allocate a global JNI ref to the buffer object.
332    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
333
334    renderer->drawBitmap(bitmap, left, top, paint);
335}
336
337static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject clazz,
338        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer,
339        float srcLeft, float srcTop, float srcRight, float srcBottom,
340        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
341    // This object allows the renderer to allocate a global JNI ref to the buffer object.
342    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
343
344    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
345            dstLeft, dstTop, dstRight, dstBottom, paint);
346}
347
348static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject clazz,
349        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer, SkMatrix* matrix,
350        SkPaint* paint) {
351    // This object allows the renderer to allocate a global JNI ref to the buffer object.
352    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
353
354    renderer->drawBitmap(bitmap, matrix, paint);
355}
356
357static void android_view_GLES20Canvas_drawBitmapMesh(JNIEnv* env, jobject clazz,
358        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer,
359        jint meshWidth, jint meshHeight, jfloatArray vertices, jint offset,
360        jintArray colors, jint colorOffset, SkPaint* paint) {
361    // This object allows the renderer to allocate a global JNI ref to the buffer object.
362    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
363
364    jfloat* verticesArray = vertices ? env->GetFloatArrayElements(vertices, NULL) + offset : NULL;
365    jint* colorsArray = colors ? env->GetIntArrayElements(colors, NULL) + colorOffset : NULL;
366
367    renderer->drawBitmapMesh(bitmap, meshWidth, meshHeight, verticesArray, colorsArray, paint);
368
369    if (vertices) env->ReleaseFloatArrayElements(vertices, verticesArray, 0);
370    if (colors) env->ReleaseIntArrayElements(colors, colorsArray, 0);
371}
372
373static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject clazz,
374        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer, jbyteArray chunks,
375        float left, float top, float right, float bottom, SkPaint* paint) {
376    // This object allows the renderer to allocate a global JNI ref to the buffer object.
377    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
378
379    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
380    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
381    Res_png_9patch::deserialize(patch);
382
383    renderer->drawPatch(bitmap, &patch->xDivs[0], &patch->yDivs[0],
384            &patch->colors[0], patch->numXDivs, patch->numYDivs, patch->numColors,
385            left, top, right, bottom, paint);
386
387    env->ReleaseByteArrayElements(chunks, storage, 0);
388}
389
390static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject clazz,
391        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
392    renderer->drawColor(color, mode);
393}
394
395static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject clazz,
396        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
397        SkPaint* paint) {
398    renderer->drawRect(left, top, right, bottom, paint);
399}
400
401static void android_view_GLES20Canvas_drawRoundRect(JNIEnv* env, jobject clazz,
402        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
403        jfloat rx, jfloat ry, SkPaint* paint) {
404    renderer->drawRoundRect(left, top, right, bottom, rx, ry, paint);
405}
406
407static void android_view_GLES20Canvas_drawCircle(JNIEnv* env, jobject clazz,
408        OpenGLRenderer* renderer, jfloat x, jfloat y, jfloat radius, SkPaint* paint) {
409    renderer->drawCircle(x, y, radius, paint);
410}
411
412static void android_view_GLES20Canvas_drawOval(JNIEnv* env, jobject clazz,
413        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
414        SkPaint* paint) {
415    renderer->drawOval(left, top, right, bottom, paint);
416}
417
418static void android_view_GLES20Canvas_drawArc(JNIEnv* env, jobject clazz,
419        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
420        jfloat startAngle, jfloat sweepAngle, jboolean useCenter, SkPaint* paint) {
421    renderer->drawArc(left, top, right, bottom, startAngle, sweepAngle, useCenter, paint);
422}
423
424static void android_view_GLES20Canvas_drawRects(JNIEnv* env, jobject clazz,
425        OpenGLRenderer* renderer, SkRegion* region, SkPaint* paint) {
426    SkRegion::Iterator it(*region);
427    while (!it.done()) {
428        const SkIRect& r = it.rect();
429        renderer->drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
430        it.next();
431    }
432}
433
434static void android_view_GLES20Canvas_drawPoints(JNIEnv* env, jobject clazz,
435        OpenGLRenderer* renderer, jfloatArray points, jint offset, jint count, SkPaint* paint) {
436    jfloat* storage = env->GetFloatArrayElements(points, NULL);
437    renderer->drawPoints(storage + offset, count, paint);
438    env->ReleaseFloatArrayElements(points, storage, 0);
439}
440
441static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject clazz,
442        OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) {
443    renderer->drawPath(path, paint);
444}
445
446static void android_view_GLES20Canvas_drawLines(JNIEnv* env, jobject clazz,
447        OpenGLRenderer* renderer, jfloatArray points, jint offset, jint count, SkPaint* paint) {
448    jfloat* storage = env->GetFloatArrayElements(points, NULL);
449    renderer->drawLines(storage + offset, count, paint);
450    env->ReleaseFloatArrayElements(points, storage, 0);
451}
452
453// ----------------------------------------------------------------------------
454// Shaders and color filters
455// ----------------------------------------------------------------------------
456
457static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject clazz,
458        OpenGLRenderer* renderer, jint modifiers) {
459    if (modifiers & MODIFIER_SHADOW) renderer->resetShadow();
460    if (modifiers & MODIFIER_SHADER) renderer->resetShader();
461    if (modifiers & MODIFIER_COLOR_FILTER) renderer->resetColorFilter();
462}
463
464static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject clazz,
465        OpenGLRenderer* renderer, SkiaShader* shader) {
466    renderer->setupShader(shader);
467}
468
469static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject clazz,
470        OpenGLRenderer* renderer, SkiaColorFilter* filter) {
471    renderer->setupColorFilter(filter);
472}
473
474static void android_view_GLES20Canvas_setupShadow(JNIEnv* env, jobject clazz,
475        OpenGLRenderer* renderer, jfloat radius, jfloat dx, jfloat dy, jint color) {
476    renderer->setupShadow(radius, dx, dy, color);
477}
478
479// ----------------------------------------------------------------------------
480// Draw filters
481// ----------------------------------------------------------------------------
482
483static void android_view_GLES20Canvas_setupPaintFilter(JNIEnv* env, jobject clazz,
484        OpenGLRenderer* renderer, jint clearBits, jint setBits) {
485    renderer->setupPaintFilter(clearBits, setBits);
486}
487
488static void android_view_GLES20Canvas_resetPaintFilter(JNIEnv* env, jobject clazz,
489        OpenGLRenderer* renderer) {
490    renderer->resetPaintFilter();
491}
492
493// ----------------------------------------------------------------------------
494// Text
495// ----------------------------------------------------------------------------
496
497static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
498        jfloat x, jfloat y, int flags, SkPaint* paint) {
499    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
500            text, 0, count, count, flags);
501    if (value == NULL) {
502        return;
503    }
504    const jchar* glyphs = value->getGlyphs();
505    size_t glyphsCount = value->getGlyphsCount();
506    int bytesCount = glyphsCount * sizeof(jchar);
507    renderer->drawText((const char*) glyphs, bytesCount, glyphsCount, x, y, paint);
508}
509
510static void renderTextOnPath(OpenGLRenderer* renderer, const jchar* text, int count,
511        SkPath* path, jfloat hOffset, jfloat vOffset, int flags, SkPaint* paint) {
512    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
513            text, 0, count, count, flags);
514    if (value == NULL) {
515        return;
516    }
517    const jchar* glyphs = value->getGlyphs();
518    size_t glyphsCount = value->getGlyphsCount();
519    int bytesCount = glyphsCount * sizeof(jchar);
520    renderer->drawTextOnPath((const char*) glyphs, bytesCount, glyphsCount, path,
521            hOffset, vOffset, paint);
522}
523
524static void renderTextRun(OpenGLRenderer* renderer, const jchar* text,
525        jint start, jint count, jint contextCount, jfloat x, jfloat y,
526        int flags, SkPaint* paint) {
527    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
528            text, start, count, contextCount, flags);
529    if (value == NULL) {
530        return;
531    }
532    const jchar* glyphs = value->getGlyphs();
533    size_t glyphsCount = value->getGlyphsCount();
534    int bytesCount = glyphsCount * sizeof(jchar);
535    renderer->drawText((const char*) glyphs, bytesCount, glyphsCount, x, y, paint);
536}
537
538static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject clazz,
539        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
540        jfloat x, jfloat y, jint flags, SkPaint* paint) {
541    jchar* textArray = env->GetCharArrayElements(text, NULL);
542    renderText(renderer, textArray + index, count, x, y, flags, paint);
543    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
544}
545
546static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject clazz,
547        OpenGLRenderer* renderer, jstring text, jint start, jint end,
548        jfloat x, jfloat y, jint flags, SkPaint* paint) {
549    const jchar* textArray = env->GetStringChars(text, NULL);
550    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
551    env->ReleaseStringChars(text, textArray);
552}
553
554static void android_view_GLES20Canvas_drawTextArrayOnPath(JNIEnv* env, jobject clazz,
555        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
556        SkPath* path, jfloat hOffset, jfloat vOffset, jint flags, SkPaint* paint) {
557    jchar* textArray = env->GetCharArrayElements(text, NULL);
558    renderTextOnPath(renderer, textArray + index, count, path,
559            hOffset, vOffset, flags, paint);
560    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
561}
562
563static void android_view_GLES20Canvas_drawTextOnPath(JNIEnv* env, jobject clazz,
564        OpenGLRenderer* renderer, jstring text, jint start, jint end,
565        SkPath* path, jfloat hOffset, jfloat vOffset, jint flags, SkPaint* paint) {
566    const jchar* textArray = env->GetStringChars(text, NULL);
567    renderTextOnPath(renderer, textArray + start, end - start, path,
568            hOffset, vOffset, flags, paint);
569    env->ReleaseStringChars(text, textArray);
570}
571
572static void android_view_GLES20Canvas_drawTextRunArray(JNIEnv* env, jobject clazz,
573        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
574        jint contextIndex, jint contextCount, jfloat x, jfloat y, jint dirFlags,
575        SkPaint* paint) {
576    jchar* textArray = env->GetCharArrayElements(text, NULL);
577    renderTextRun(renderer, textArray + contextIndex, index - contextIndex,
578            count, contextCount, x, y, dirFlags, paint);
579    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
580 }
581
582static void android_view_GLES20Canvas_drawTextRun(JNIEnv* env, jobject clazz,
583        OpenGLRenderer* renderer, jstring text, jint start, jint end,
584        jint contextStart, int contextEnd, jfloat x, jfloat y, jint dirFlags,
585        SkPaint* paint) {
586    const jchar* textArray = env->GetStringChars(text, NULL);
587    jint count = end - start;
588    jint contextCount = contextEnd - contextStart;
589    renderTextRun(renderer, textArray + contextStart, start - contextStart,
590            count, contextCount, x, y, dirFlags, paint);
591    env->ReleaseStringChars(text, textArray);
592}
593
594static void renderPosText(OpenGLRenderer* renderer, const jchar* text, int count,
595        const jfloat* positions, jint dirFlags, SkPaint* paint) {
596    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
597            text, 0, count, count, dirFlags);
598    if (value == NULL) {
599        return;
600    }
601    const jchar* glyphs = value->getGlyphs();
602    size_t glyphsCount = value->getGlyphsCount();
603    if (count < int(glyphsCount)) glyphsCount = count;
604    int bytesCount = glyphsCount * sizeof(jchar);
605
606    renderer->drawPosText((const char*) glyphs, bytesCount, glyphsCount, positions, paint);
607}
608
609static void android_view_GLES20Canvas_drawPosTextArray(JNIEnv* env, jobject clazz,
610        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
611        jfloatArray pos, SkPaint* paint) {
612    jchar* textArray = env->GetCharArrayElements(text, NULL);
613    jfloat* positions = env->GetFloatArrayElements(pos, NULL);
614
615    renderPosText(renderer, textArray + index, count, positions, kBidi_LTR, paint);
616
617    env->ReleaseFloatArrayElements(pos, positions, JNI_ABORT);
618    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
619}
620
621static void android_view_GLES20Canvas_drawPosText(JNIEnv* env, jobject clazz,
622        OpenGLRenderer* renderer, jstring text, jint start, jint end,
623        jfloatArray pos, SkPaint* paint) {
624    const jchar* textArray = env->GetStringChars(text, NULL);
625    jfloat* positions = env->GetFloatArrayElements(pos, NULL);
626
627    renderPosText(renderer, textArray + start, end - start, positions, kBidi_LTR, paint);
628
629    env->ReleaseFloatArrayElements(pos, positions, JNI_ABORT);
630    env->ReleaseStringChars(text, textArray);
631}
632
633// ----------------------------------------------------------------------------
634// Display lists
635// ----------------------------------------------------------------------------
636
637static DisplayList* android_view_GLES20Canvas_getDisplayList(JNIEnv* env,
638        jobject clazz, DisplayListRenderer* renderer, DisplayList* displayList) {
639    return renderer->getDisplayList(displayList);
640}
641
642static jint android_view_GLES20Canvas_getDisplayListSize(JNIEnv* env,
643        jobject clazz, DisplayList* displayList) {
644    return displayList->getSize();
645}
646
647static void android_view_GLES20Canvas_setDisplayListName(JNIEnv* env,
648        jobject clazz, DisplayList* displayList, jstring name) {
649    if (name != NULL) {
650        const char* textArray = env->GetStringUTFChars(name, NULL);
651        displayList->setName(textArray);
652        env->ReleaseStringUTFChars(name, textArray);
653    }
654}
655
656static OpenGLRenderer* android_view_GLES20Canvas_createDisplayListRenderer(JNIEnv* env,
657        jobject clazz) {
658    return new DisplayListRenderer;
659}
660
661static void android_view_GLES20Canvas_resetDisplayListRenderer(JNIEnv* env,
662        jobject clazz, DisplayListRenderer* renderer) {
663    renderer->reset();
664}
665
666static void android_view_GLES20Canvas_destroyDisplayList(JNIEnv* env,
667        jobject clazz, DisplayList* displayList) {
668    DisplayList::destroyDisplayListDeferred(displayList);
669}
670
671static jint android_view_GLES20Canvas_drawDisplayList(JNIEnv* env,
672        jobject clazz, OpenGLRenderer* renderer, DisplayList* displayList,
673        jobject dirty, jint flags) {
674    android::uirenderer::Rect bounds;
675    status_t status = renderer->drawDisplayList(displayList, bounds, flags);
676    if (status != DrawGlInfo::kStatusDone && dirty != NULL) {
677        env->CallVoidMethod(dirty, gRectClassInfo.set,
678                int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
679    }
680    return status;
681}
682
683static void android_view_GLES20Canvas_outputDisplayList(JNIEnv* env,
684        jobject clazz, OpenGLRenderer* renderer, DisplayList* displayList) {
685    renderer->outputDisplayList(displayList);
686}
687
688// ----------------------------------------------------------------------------
689// Layers
690// ----------------------------------------------------------------------------
691
692static void android_view_GLES20Canvas_interrupt(JNIEnv* env, jobject clazz,
693        OpenGLRenderer* renderer) {
694    renderer->interrupt();
695}
696
697static void android_view_GLES20Canvas_resume(JNIEnv* env, jobject clazz,
698        OpenGLRenderer* renderer) {
699    renderer->resume();
700}
701
702static OpenGLRenderer* android_view_GLES20Canvas_createLayerRenderer(JNIEnv* env,
703        jobject clazz, Layer* layer) {
704    if (layer) {
705        return new LayerRenderer(layer);
706    }
707    return NULL;
708}
709
710static Layer* android_view_GLES20Canvas_createTextureLayer(JNIEnv* env, jobject clazz,
711        jboolean isOpaque, jintArray layerInfo) {
712    Layer* layer = LayerRenderer::createTextureLayer(isOpaque);
713
714    if (layer) {
715        jint* storage = env->GetIntArrayElements(layerInfo, NULL);
716        storage[0] = layer->getTexture();
717        env->ReleaseIntArrayElements(layerInfo, storage, 0);
718    }
719
720    return layer;
721}
722
723static Layer* android_view_GLES20Canvas_createLayer(JNIEnv* env, jobject clazz,
724        jint width, jint height, jboolean isOpaque, jintArray layerInfo) {
725    Layer* layer = LayerRenderer::createLayer(width, height, isOpaque);
726
727    if (layer) {
728        jint* storage = env->GetIntArrayElements(layerInfo, NULL);
729        storage[0] = layer->getWidth();
730        storage[1] = layer->getHeight();
731        env->ReleaseIntArrayElements(layerInfo, storage, 0);
732    }
733
734    return layer;
735}
736
737static void android_view_GLES20Canvas_resizeLayer(JNIEnv* env, jobject clazz,
738        Layer* layer, jint width, jint height, jintArray layerInfo) {
739    LayerRenderer::resizeLayer(layer, width, height);
740
741    jint* storage = env->GetIntArrayElements(layerInfo, NULL);
742    storage[0] = layer->getWidth();
743    storage[1] = layer->getHeight();
744    env->ReleaseIntArrayElements(layerInfo, storage, 0);
745}
746
747static void android_view_GLES20Canvas_updateTextureLayer(JNIEnv* env, jobject clazz,
748        Layer* layer, jint width, jint height, jboolean isOpaque, jobject surface) {
749    float transform[16];
750    sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, surface));
751
752    surfaceTexture->updateTexImage();
753    surfaceTexture->getTransformMatrix(transform);
754    GLenum renderTarget = surfaceTexture->getCurrentTextureTarget();
755
756    LayerRenderer::updateTextureLayer(layer, width, height, isOpaque, renderTarget, transform);
757}
758
759static void android_view_GLES20Canvas_updateRenderLayer(JNIEnv* env, jobject clazz,
760        Layer* layer, OpenGLRenderer* renderer, DisplayList* displayList,
761        jint left, jint top, jint right, jint bottom) {
762    layer->updateDeferred(renderer, displayList, left, top, right, bottom);
763}
764
765static void android_view_GLES20Canvas_setTextureLayerTransform(JNIEnv* env, jobject clazz,
766        Layer* layer, SkMatrix* matrix) {
767
768    layer->getTransform().load(*matrix);
769}
770
771static void android_view_GLES20Canvas_destroyLayer(JNIEnv* env, jobject clazz, Layer* layer) {
772    LayerRenderer::destroyLayer(layer);
773}
774
775static void android_view_GLES20Canvas_destroyLayerDeferred(JNIEnv* env,
776        jobject clazz, Layer* layer) {
777    LayerRenderer::destroyLayerDeferred(layer);
778}
779
780static void android_view_GLES20Canvas_flushLayer(JNIEnv* env, jobject clazz, Layer* layer) {
781    LayerRenderer::flushLayer(layer);
782}
783
784static void android_view_GLES20Canvas_drawLayer(JNIEnv* env, jobject clazz,
785        OpenGLRenderer* renderer, Layer* layer, jfloat x, jfloat y, SkPaint* paint) {
786    renderer->drawLayer(layer, x, y, paint);
787}
788
789static jboolean android_view_GLES20Canvas_copyLayer(JNIEnv* env, jobject clazz,
790        Layer* layer, SkBitmap* bitmap) {
791    return LayerRenderer::copyLayer(layer, bitmap);
792}
793
794#endif // USE_OPENGL_RENDERER
795
796// ----------------------------------------------------------------------------
797// Common
798// ----------------------------------------------------------------------------
799
800static jboolean android_view_GLES20Canvas_isAvailable(JNIEnv* env, jobject clazz) {
801#ifdef USE_OPENGL_RENDERER
802    char prop[PROPERTY_VALUE_MAX];
803    if (property_get("ro.kernel.qemu", prop, NULL) == 0) {
804        // not in the emulator
805        return JNI_TRUE;
806    }
807    // In the emulator this property will be set to 1 when hardware GLES is
808    // enabled, 0 otherwise. On old emulator versions it will be undefined.
809    property_get("ro.kernel.qemu.gles", prop, "0");
810    return atoi(prop) == 1 ? JNI_TRUE : JNI_FALSE;
811#else
812    return JNI_FALSE;
813#endif
814}
815
816// ----------------------------------------------------------------------------
817// Logging
818// ----------------------------------------------------------------------------
819
820static void
821android_app_ActivityThread_dumpGraphics(JNIEnv* env, jobject clazz, jobject javaFileDescriptor) {
822#ifdef USE_OPENGL_RENDERER
823    int fd = jniGetFDFromFileDescriptor(env, javaFileDescriptor);
824    android::uirenderer::DisplayList::outputLogBuffer(fd);
825#endif // USE_OPENGL_RENDERER
826}
827
828// ----------------------------------------------------------------------------
829// JNI Glue
830// ----------------------------------------------------------------------------
831
832const char* const kClassPathName = "android/view/GLES20Canvas";
833
834static JNINativeMethod gMethods[] = {
835    { "nIsAvailable",       "()Z",             (void*) android_view_GLES20Canvas_isAvailable },
836
837#ifdef USE_OPENGL_RENDERER
838    { "nFlushCaches",       "(I)V",            (void*) android_view_GLES20Canvas_flushCaches },
839    { "nInitCaches",        "()V",             (void*) android_view_GLES20Canvas_initCaches },
840    { "nTerminateCaches",   "()V",             (void*) android_view_GLES20Canvas_terminateCaches },
841
842    { "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
843    { "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
844    { "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
845    { "nPrepare",           "(IZ)V",           (void*) android_view_GLES20Canvas_prepare },
846    { "nPrepareDirty",      "(IIIIIZ)V",       (void*) android_view_GLES20Canvas_prepareDirty },
847    { "nFinish",            "(I)V",            (void*) android_view_GLES20Canvas_finish },
848
849    { "nGetStencilSize",    "()I",             (void*) android_view_GLES20Canvas_getStencilSize },
850
851    { "nCallDrawGLFunction", "(II)I",          (void*) android_view_GLES20Canvas_callDrawGLFunction },
852    { "nDetachFunctor",      "(II)V",          (void*) android_view_GLES20Canvas_detachFunctor },
853    { "nAttachFunctor",      "(II)V",          (void*) android_view_GLES20Canvas_attachFunctor },
854    { "nInvokeFunctors",     "(ILandroid/graphics/Rect;)I",
855            (void*) android_view_GLES20Canvas_invokeFunctors },
856
857    { "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
858    { "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
859    { "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
860    { "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
861
862    { "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
863    { "nSaveLayer",         "(III)I",          (void*) android_view_GLES20Canvas_saveLayerClip },
864    { "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
865    { "nSaveLayerAlpha",    "(III)I",          (void*) android_view_GLES20Canvas_saveLayerAlphaClip },
866
867    { "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
868    { "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
869    { "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
870
871    { "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
872    { "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
873    { "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
874    { "nSkew",              "(IFF)V",          (void*) android_view_GLES20Canvas_skew },
875
876    { "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
877    { "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
878    { "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
879
880    { "nDrawBitmap",        "(II[BFFI)V",      (void*) android_view_GLES20Canvas_drawBitmap },
881    { "nDrawBitmap",        "(II[BFFFFFFFFI)V",(void*) android_view_GLES20Canvas_drawBitmapRect },
882    { "nDrawBitmap",        "(II[BII)V",       (void*) android_view_GLES20Canvas_drawBitmapMatrix },
883
884    { "nDrawBitmapMesh",    "(II[BII[FI[III)V",(void*) android_view_GLES20Canvas_drawBitmapMesh },
885
886    { "nDrawPatch",         "(II[B[BFFFFI)V",  (void*) android_view_GLES20Canvas_drawPatch },
887
888    { "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
889    { "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
890    { "nDrawRects",         "(III)V",          (void*) android_view_GLES20Canvas_drawRects },
891    { "nDrawRoundRect",     "(IFFFFFFI)V",     (void*) android_view_GLES20Canvas_drawRoundRect },
892    { "nDrawCircle",        "(IFFFI)V",        (void*) android_view_GLES20Canvas_drawCircle },
893    { "nDrawOval",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawOval },
894    { "nDrawArc",           "(IFFFFFFZI)V",    (void*) android_view_GLES20Canvas_drawArc },
895    { "nDrawPoints",        "(I[FIII)V",       (void*) android_view_GLES20Canvas_drawPoints },
896
897    { "nDrawPath",          "(III)V",          (void*) android_view_GLES20Canvas_drawPath },
898    { "nDrawLines",         "(I[FIII)V",       (void*) android_view_GLES20Canvas_drawLines },
899
900    { "nResetModifiers",    "(II)V",           (void*) android_view_GLES20Canvas_resetModifiers },
901    { "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
902    { "nSetupColorFilter",  "(II)V",           (void*) android_view_GLES20Canvas_setupColorFilter },
903    { "nSetupShadow",       "(IFFFI)V",        (void*) android_view_GLES20Canvas_setupShadow },
904
905    { "nSetupPaintFilter",  "(III)V",          (void*) android_view_GLES20Canvas_setupPaintFilter },
906    { "nResetPaintFilter",  "(I)V",            (void*) android_view_GLES20Canvas_resetPaintFilter },
907
908    { "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
909    { "nDrawText",          "(ILjava/lang/String;IIFFII)V",
910            (void*) android_view_GLES20Canvas_drawText },
911
912    { "nDrawTextOnPath",    "(I[CIIIFFII)V",   (void*) android_view_GLES20Canvas_drawTextArrayOnPath },
913    { "nDrawTextOnPath",    "(ILjava/lang/String;IIIFFII)V",
914            (void*) android_view_GLES20Canvas_drawTextOnPath },
915
916    { "nDrawTextRun",       "(I[CIIIIFFII)V",  (void*) android_view_GLES20Canvas_drawTextRunArray },
917    { "nDrawTextRun",       "(ILjava/lang/String;IIIIFFII)V",
918            (void*) android_view_GLES20Canvas_drawTextRun },
919
920    { "nDrawPosText",       "(I[CII[FI)V",     (void*) android_view_GLES20Canvas_drawPosTextArray },
921    { "nDrawPosText",       "(ILjava/lang/String;II[FI)V",
922            (void*) android_view_GLES20Canvas_drawPosText },
923
924    { "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
925            (void*) android_view_GLES20Canvas_getClipBounds },
926
927    { "nGetDisplayList",         "(II)I",      (void*) android_view_GLES20Canvas_getDisplayList },
928    { "nDestroyDisplayList",     "(I)V",       (void*) android_view_GLES20Canvas_destroyDisplayList },
929    { "nGetDisplayListSize",     "(I)I",       (void*) android_view_GLES20Canvas_getDisplayListSize },
930    { "nSetDisplayListName",     "(ILjava/lang/String;)V",
931            (void*) android_view_GLES20Canvas_setDisplayListName },
932    { "nDrawDisplayList",        "(IILandroid/graphics/Rect;I)I",
933            (void*) android_view_GLES20Canvas_drawDisplayList },
934
935    { "nCreateDisplayListRenderer", "()I",     (void*) android_view_GLES20Canvas_createDisplayListRenderer },
936    { "nResetDisplayListRenderer",  "(I)V",    (void*) android_view_GLES20Canvas_resetDisplayListRenderer },
937
938    { "nOutputDisplayList",      "(II)V",      (void*) android_view_GLES20Canvas_outputDisplayList },
939    { "nInterrupt",              "(I)V",       (void*) android_view_GLES20Canvas_interrupt },
940    { "nResume",                 "(I)V",       (void*) android_view_GLES20Canvas_resume },
941
942    { "nCreateLayerRenderer",    "(I)I",       (void*) android_view_GLES20Canvas_createLayerRenderer },
943    { "nCreateLayer",            "(IIZ[I)I",   (void*) android_view_GLES20Canvas_createLayer },
944    { "nResizeLayer",            "(III[I)V" ,  (void*) android_view_GLES20Canvas_resizeLayer },
945    { "nCreateTextureLayer",     "(Z[I)I",     (void*) android_view_GLES20Canvas_createTextureLayer },
946    { "nUpdateTextureLayer",     "(IIIZLandroid/graphics/SurfaceTexture;)V",
947            (void*) android_view_GLES20Canvas_updateTextureLayer },
948    { "nUpdateRenderLayer",      "(IIIIIII)V", (void*) android_view_GLES20Canvas_updateRenderLayer },
949    { "nDestroyLayer",           "(I)V",       (void*) android_view_GLES20Canvas_destroyLayer },
950    { "nDestroyLayerDeferred",   "(I)V",       (void*) android_view_GLES20Canvas_destroyLayerDeferred },
951    { "nFlushLayer",             "(I)V",       (void*) android_view_GLES20Canvas_flushLayer },
952    { "nDrawLayer",              "(IIFFI)V",   (void*) android_view_GLES20Canvas_drawLayer },
953    { "nCopyLayer",              "(II)Z",      (void*) android_view_GLES20Canvas_copyLayer },
954
955    { "nSetTextureLayerTransform", "(II)V",    (void*) android_view_GLES20Canvas_setTextureLayerTransform },
956
957    { "nGetMaximumTextureWidth",  "()I",       (void*) android_view_GLES20Canvas_getMaxTextureWidth },
958    { "nGetMaximumTextureHeight", "()I",       (void*) android_view_GLES20Canvas_getMaxTextureHeight },
959
960#endif
961};
962
963static JNINativeMethod gActivityThreadMethods[] = {
964    { "dumpGraphicsInfo",        "(Ljava/io/FileDescriptor;)V",
965                                               (void*) android_app_ActivityThread_dumpGraphics }
966};
967
968
969#ifdef USE_OPENGL_RENDERER
970    #define FIND_CLASS(var, className) \
971            var = env->FindClass(className); \
972            LOG_FATAL_IF(! var, "Unable to find class " className);
973
974    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
975            var = env->GetMethodID(clazz, methodName, methodDescriptor); \
976            LOG_FATAL_IF(! var, "Unable to find method " methodName);
977#else
978    #define FIND_CLASS(var, className)
979    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor)
980#endif
981
982int register_android_view_GLES20Canvas(JNIEnv* env) {
983    jclass clazz;
984    FIND_CLASS(clazz, "android/graphics/Rect");
985    GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V");
986
987    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
988}
989
990const char* const kActivityThreadPathName = "android/app/ActivityThread";
991
992int register_android_app_ActivityThread(JNIEnv* env) {
993    return AndroidRuntime::registerNativeMethods(env, kActivityThreadPathName,
994            gActivityThreadMethods, NELEM(gActivityThreadMethods));
995}
996
997};
998