android_view_GLES20Canvas.cpp revision 325740fb444af8fc7fb0119b2e30ce322c2ae134 
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#include <android_runtime/AndroidRuntime.h>
25#include <android_runtime/android_graphics_SurfaceTexture.h>
26#include <cutils/properties.h>
27#include <androidfw/ResourceTypes.h>
28
29#include <gui/SurfaceTexture.h>
30
31#include <SkBitmap.h>
32#include <SkCanvas.h>
33#include <SkMatrix.h>
34#include <SkPaint.h>
35#include <SkRegion.h>
36#include <SkScalerContext.h>
37#include <SkTemplates.h>
38#include <SkXfermode.h>
39
40#include <DisplayListRenderer.h>
41#include <LayerRenderer.h>
42#include <OpenGLRenderer.h>
43#include <SkiaShader.h>
44#include <SkiaColorFilter.h>
45#include <Rect.h>
46
47#include <TextLayout.h>
48#include <TextLayoutCache.h>
49
50namespace android {
51
52using namespace uirenderer;
53
54/**
55 * Note: OpenGLRenderer JNI layer is generated and compiled only on supported
56 *       devices. This means all the logic must be compiled only when the
57 *       preprocessor variable USE_OPENGL_RENDERER is defined.
58 */
59#ifdef USE_OPENGL_RENDERER
60
61///////////////////////////////////////////////////////////////////////////////
62// Defines
63///////////////////////////////////////////////////////////////////////////////
64
65// Debug
66#define DEBUG_RENDERER 0
67
68// Debug
69#if DEBUG_RENDERER
70    #define RENDERER_LOGD(...) ALOGD(__VA_ARGS__)
71#else
72    #define RENDERER_LOGD(...)
73#endif
74
75#define MODIFIER_SHADOW 1
76#define MODIFIER_SHADER 2
77#define MODIFIER_COLOR_FILTER 4
78
79// ----------------------------------------------------------------------------
80
81static struct {
82    jmethodID set;
83} gRectClassInfo;
84
85// ----------------------------------------------------------------------------
86// Misc
87// ----------------------------------------------------------------------------
88
89static jboolean android_view_GLES20Canvas_preserveBackBuffer(JNIEnv* env, jobject clazz) {
90    EGLDisplay display = eglGetCurrentDisplay();
91    EGLSurface surface = eglGetCurrentSurface(EGL_DRAW);
92
93    eglGetError();
94    eglSurfaceAttrib(display, surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
95
96    EGLint error = eglGetError();
97    if (error != EGL_SUCCESS) {
98        RENDERER_LOGD("Could not enable buffer preserved swap behavior (%x)", error);
99    }
100
101    return error == EGL_SUCCESS;
102}
103
104static jboolean android_view_GLES20Canvas_isBackBufferPreserved(JNIEnv* env, jobject clazz) {
105    EGLDisplay display = eglGetCurrentDisplay();
106    EGLSurface surface = eglGetCurrentSurface(EGL_DRAW);
107    EGLint value;
108
109    eglGetError();
110    eglQuerySurface(display, surface, EGL_SWAP_BEHAVIOR, &value);
111
112    EGLint error = eglGetError();
113    if (error != EGL_SUCCESS) {
114        RENDERER_LOGD("Could not query buffer preserved swap behavior (%x)", error);
115    }
116
117    return error == EGL_SUCCESS && value == EGL_BUFFER_PRESERVED;
118}
119
120static void android_view_GLES20Canvas_disableVsync(JNIEnv* env, jobject clazz) {
121    EGLDisplay display = eglGetCurrentDisplay();
122
123    eglGetError();
124    eglSwapInterval(display, 0);
125
126    EGLint error = eglGetError();
127    if (error != EGL_SUCCESS) {
128        RENDERER_LOGD("Could not disable v-sync (%x)", error);
129    }
130}
131
132static void android_view_GLES20Canvas_flushCaches(JNIEnv* env, jobject clazz,
133        Caches::FlushMode mode) {
134    if (Caches::hasInstance()) {
135        Caches::getInstance().flush(mode);
136    }
137}
138
139static void android_view_GLES20Canvas_initCaches(JNIEnv* env, jobject clazz) {
140    if (Caches::hasInstance()) {
141        Caches::getInstance().init();
142    }
143}
144
145static void android_view_GLES20Canvas_terminateCaches(JNIEnv* env, jobject clazz) {
146    if (Caches::hasInstance()) {
147        Caches::getInstance().terminate();
148    }
149}
150
151// ----------------------------------------------------------------------------
152// Constructors
153// ----------------------------------------------------------------------------
154
155static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject clazz) {
156    RENDERER_LOGD("Create OpenGLRenderer");
157    return new OpenGLRenderer;
158}
159
160static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject clazz,
161        OpenGLRenderer* renderer) {
162    RENDERER_LOGD("Destroy OpenGLRenderer");
163    delete renderer;
164}
165
166// ----------------------------------------------------------------------------
167// Setup
168// ----------------------------------------------------------------------------
169
170static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject clazz,
171        OpenGLRenderer* renderer, jint width, jint height) {
172    renderer->setViewport(width, height);
173}
174
175static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject clazz,
176        OpenGLRenderer* renderer, jboolean opaque) {
177    renderer->prepare(opaque);
178}
179
180static void android_view_GLES20Canvas_prepareDirty(JNIEnv* env, jobject clazz,
181        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
182        jboolean opaque) {
183    renderer->prepareDirty(left, top, right, bottom, opaque);
184}
185
186static void android_view_GLES20Canvas_finish(JNIEnv* env, jobject clazz,
187        OpenGLRenderer* renderer) {
188    renderer->finish();
189}
190
191static jint android_view_GLES20Canvas_getStencilSize(JNIEnv* env, jobject clazz) {
192    return OpenGLRenderer::getStencilSize();
193}
194
195// ----------------------------------------------------------------------------
196// Functor
197// ----------------------------------------------------------------------------
198
199static bool android_view_GLES20Canvas_callDrawGLFunction(JNIEnv* env, jobject clazz,
200        OpenGLRenderer* renderer, Functor *functor) {
201    android::uirenderer::Rect dirty;
202    return renderer->callDrawGLFunction(functor, dirty);
203}
204
205static jint android_view_GLES20Canvas_getMaxTextureWidth(JNIEnv* env, jobject clazz) {
206    return Caches::getInstance().maxTextureSize;
207}
208
209static jint android_view_GLES20Canvas_getMaxTextureHeight(JNIEnv* env, jobject clazz) {
210    return Caches::getInstance().maxTextureSize;
211}
212
213// ----------------------------------------------------------------------------
214// State
215// ----------------------------------------------------------------------------
216
217static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject clazz, OpenGLRenderer* renderer,
218        jint flags) {
219    return renderer->save(flags);
220}
221
222static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject clazz,
223        OpenGLRenderer* renderer) {
224    return renderer->getSaveCount();
225}
226
227static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject clazz,
228        OpenGLRenderer* renderer) {
229    renderer->restore();
230}
231
232static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject clazz,
233        OpenGLRenderer* renderer, jint saveCount) {
234    renderer->restoreToCount(saveCount);
235}
236
237// ----------------------------------------------------------------------------
238// Layers
239// ----------------------------------------------------------------------------
240
241static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject clazz,
242        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
243        SkPaint* paint, jint saveFlags) {
244    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
245}
246
247static jint android_view_GLES20Canvas_saveLayerClip(JNIEnv* env, jobject clazz,
248        OpenGLRenderer* renderer, SkPaint* paint, jint saveFlags) {
249    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
250    return renderer->saveLayer(bounds.left, bounds.top, bounds.right, bounds.bottom,
251            paint, saveFlags);
252}
253
254static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject clazz,
255        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
256        jint alpha, jint saveFlags) {
257    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
258}
259
260static jint android_view_GLES20Canvas_saveLayerAlphaClip(JNIEnv* env, jobject clazz,
261        OpenGLRenderer* renderer, jint alpha, jint saveFlags) {
262    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
263    return renderer->saveLayerAlpha(bounds.left, bounds.top, bounds.right, bounds.bottom,
264            alpha, saveFlags);
265}
266
267// ----------------------------------------------------------------------------
268// Clipping
269// ----------------------------------------------------------------------------
270
271static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject clazz,
272        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
273        SkCanvas::EdgeType edge) {
274    return renderer->quickReject(left, top, right, bottom);
275}
276
277static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject clazz,
278        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
279        SkRegion::Op op) {
280    return renderer->clipRect(left, top, right, bottom, op);
281}
282
283static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject clazz,
284        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
285        SkRegion::Op op) {
286    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
287}
288
289static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject clazz,
290        OpenGLRenderer* renderer, jobject rect) {
291    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
292
293    env->CallVoidMethod(rect, gRectClassInfo.set,
294            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
295
296    return !bounds.isEmpty();
297}
298
299// ----------------------------------------------------------------------------
300// Transforms
301// ----------------------------------------------------------------------------
302
303static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject clazz,
304        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
305    renderer->translate(dx, dy);
306}
307
308static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject clazz,
309        OpenGLRenderer* renderer, jfloat degrees) {
310    renderer->rotate(degrees);
311}
312
313static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject clazz,
314        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
315    renderer->scale(sx, sy);
316}
317
318static void android_view_GLES20Canvas_skew(JNIEnv* env, jobject clazz,
319        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
320    renderer->skew(sx, sy);
321}
322
323static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject clazz,
324        OpenGLRenderer* renderer, SkMatrix* matrix) {
325    renderer->setMatrix(matrix);
326}
327
328static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject clazz,
329        OpenGLRenderer* renderer, SkMatrix* matrix) {
330    renderer->getMatrix(matrix);
331}
332
333static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject clazz,
334        OpenGLRenderer* renderer, SkMatrix* matrix) {
335    renderer->concatMatrix(matrix);
336}
337
338// ----------------------------------------------------------------------------
339// Drawing
340// ----------------------------------------------------------------------------
341
342static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject clazz,
343        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer, float left,
344        float top, SkPaint* paint) {
345    // This object allows the renderer to allocate a global JNI ref to the buffer object.
346    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
347
348    renderer->drawBitmap(bitmap, left, top, paint);
349}
350
351static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject clazz,
352        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer,
353        float srcLeft, float srcTop, float srcRight, float srcBottom,
354        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
355    // This object allows the renderer to allocate a global JNI ref to the buffer object.
356    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
357
358    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
359            dstLeft, dstTop, dstRight, dstBottom, paint);
360}
361
362static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject clazz,
363        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer, SkMatrix* matrix,
364        SkPaint* paint) {
365    // This object allows the renderer to allocate a global JNI ref to the buffer object.
366    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
367
368    renderer->drawBitmap(bitmap, matrix, paint);
369}
370
371static void android_view_GLES20Canvas_drawBitmapMesh(JNIEnv* env, jobject clazz,
372        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer,
373        jint meshWidth, jint meshHeight, jfloatArray vertices, jint offset,
374        jintArray colors, jint colorOffset, SkPaint* paint) {
375    // This object allows the renderer to allocate a global JNI ref to the buffer object.
376    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
377
378    jfloat* verticesArray = vertices ? env->GetFloatArrayElements(vertices, NULL) + offset : NULL;
379    jint* colorsArray = colors ? env->GetIntArrayElements(colors, NULL) + colorOffset : NULL;
380
381    renderer->drawBitmapMesh(bitmap, meshWidth, meshHeight, verticesArray, colorsArray, paint);
382
383    if (vertices) env->ReleaseFloatArrayElements(vertices, verticesArray, 0);
384    if (colors) env->ReleaseIntArrayElements(colors, colorsArray, 0);
385}
386
387static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject clazz,
388        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray buffer, jbyteArray chunks,
389        float left, float top, float right, float bottom, SkPaint* paint) {
390    // This object allows the renderer to allocate a global JNI ref to the buffer object.
391    JavaHeapBitmapRef bitmapRef(env, bitmap, buffer);
392
393    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
394    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
395    Res_png_9patch::deserialize(patch);
396
397    renderer->drawPatch(bitmap, &patch->xDivs[0], &patch->yDivs[0],
398            &patch->colors[0], patch->numXDivs, patch->numYDivs, patch->numColors,
399            left, top, right, bottom, paint);
400
401    env->ReleaseByteArrayElements(chunks, storage, 0);
402}
403
404static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject clazz,
405        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
406    renderer->drawColor(color, mode);
407}
408
409static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject clazz,
410        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
411        SkPaint* paint) {
412    renderer->drawRect(left, top, right, bottom, paint);
413}
414
415static void android_view_GLES20Canvas_drawRoundRect(JNIEnv* env, jobject clazz,
416        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
417        jfloat rx, jfloat ry, SkPaint* paint) {
418    renderer->drawRoundRect(left, top, right, bottom, rx, ry, paint);
419}
420
421static void android_view_GLES20Canvas_drawCircle(JNIEnv* env, jobject clazz,
422        OpenGLRenderer* renderer, jfloat x, jfloat y, jfloat radius, SkPaint* paint) {
423    renderer->drawCircle(x, y, radius, paint);
424}
425
426static void android_view_GLES20Canvas_drawOval(JNIEnv* env, jobject clazz,
427        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
428        SkPaint* paint) {
429    renderer->drawOval(left, top, right, bottom, paint);
430}
431
432static void android_view_GLES20Canvas_drawArc(JNIEnv* env, jobject clazz,
433        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
434        jfloat startAngle, jfloat sweepAngle, jboolean useCenter, SkPaint* paint) {
435    renderer->drawArc(left, top, right, bottom, startAngle, sweepAngle, useCenter, paint);
436}
437
438static void android_view_GLES20Canvas_drawRects(JNIEnv* env, jobject clazz,
439        OpenGLRenderer* renderer, SkRegion* region, SkPaint* paint) {
440    SkRegion::Iterator it(*region);
441    while (!it.done()) {
442        const SkIRect& r = it.rect();
443        renderer->drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
444        it.next();
445    }
446}
447
448static void android_view_GLES20Canvas_drawPoints(JNIEnv* env, jobject clazz,
449        OpenGLRenderer* renderer, jfloatArray points, jint offset, jint count, SkPaint* paint) {
450    jfloat* storage = env->GetFloatArrayElements(points, NULL);
451    renderer->drawPoints(storage + offset, count, paint);
452    env->ReleaseFloatArrayElements(points, storage, 0);
453}
454
455static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject clazz,
456        OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) {
457    renderer->drawPath(path, paint);
458}
459
460static void android_view_GLES20Canvas_drawLines(JNIEnv* env, jobject clazz,
461        OpenGLRenderer* renderer, jfloatArray points, jint offset, jint count, SkPaint* paint) {
462    jfloat* storage = env->GetFloatArrayElements(points, NULL);
463    renderer->drawLines(storage + offset, count, paint);
464    env->ReleaseFloatArrayElements(points, storage, 0);
465}
466
467// ----------------------------------------------------------------------------
468// Shaders and color filters
469// ----------------------------------------------------------------------------
470
471static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject clazz,
472        OpenGLRenderer* renderer, jint modifiers) {
473    if (modifiers & MODIFIER_SHADOW) renderer->resetShadow();
474    if (modifiers & MODIFIER_SHADER) renderer->resetShader();
475    if (modifiers & MODIFIER_COLOR_FILTER) renderer->resetColorFilter();
476}
477
478static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject clazz,
479        OpenGLRenderer* renderer, SkiaShader* shader) {
480    renderer->setupShader(shader);
481}
482
483static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject clazz,
484        OpenGLRenderer* renderer, SkiaColorFilter* filter) {
485    renderer->setupColorFilter(filter);
486}
487
488static void android_view_GLES20Canvas_setupShadow(JNIEnv* env, jobject clazz,
489        OpenGLRenderer* renderer, jfloat radius, jfloat dx, jfloat dy, jint color) {
490    renderer->setupShadow(radius, dx, dy, color);
491}
492
493// ----------------------------------------------------------------------------
494// Draw filters
495// ----------------------------------------------------------------------------
496
497static void android_view_GLES20Canvas_setupPaintFilter(JNIEnv* env, jobject clazz,
498        OpenGLRenderer* renderer, jint clearBits, jint setBits) {
499    renderer->setupPaintFilter(clearBits, setBits);
500}
501
502static void android_view_GLES20Canvas_resetPaintFilter(JNIEnv* env, jobject clazz,
503        OpenGLRenderer* renderer) {
504    renderer->resetPaintFilter();
505}
506
507// ----------------------------------------------------------------------------
508// Text
509// ----------------------------------------------------------------------------
510
511static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
512        jfloat x, jfloat y, int flags, SkPaint* paint) {
513    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
514            text, 0, count, count, flags);
515    if (value == NULL) {
516        return;
517    }
518    const jchar* glyphs = value->getGlyphs();
519    size_t glyphsCount = value->getGlyphsCount();
520    int bytesCount = glyphsCount * sizeof(jchar);
521    renderer->drawText((const char*) glyphs, bytesCount, glyphsCount, x, y, paint);
522}
523
524static void renderTextOnPath(OpenGLRenderer* renderer, const jchar* text, int count,
525        SkPath* path, jfloat hOffset, jfloat vOffset, int flags, SkPaint* paint) {
526    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
527            text, 0, count, count, flags);
528    if (value == NULL) {
529        return;
530    }
531    const jchar* glyphs = value->getGlyphs();
532    size_t glyphsCount = value->getGlyphsCount();
533    int bytesCount = glyphsCount * sizeof(jchar);
534    renderer->drawTextOnPath((const char*) glyphs, bytesCount, glyphsCount, path,
535            hOffset, vOffset, paint);
536}
537
538static void renderTextRun(OpenGLRenderer* renderer, const jchar* text,
539        jint start, jint count, jint contextCount, jfloat x, jfloat y,
540        int flags, SkPaint* paint) {
541    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
542            text, start, count, contextCount, flags);
543    if (value == NULL) {
544        return;
545    }
546    const jchar* glyphs = value->getGlyphs();
547    size_t glyphsCount = value->getGlyphsCount();
548    int bytesCount = glyphsCount * sizeof(jchar);
549    renderer->drawText((const char*) glyphs, bytesCount, glyphsCount, x, y, paint);
550}
551
552static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject clazz,
553        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
554        jfloat x, jfloat y, jint flags, SkPaint* paint) {
555    jchar* textArray = env->GetCharArrayElements(text, NULL);
556    renderText(renderer, textArray + index, count, x, y, flags, paint);
557    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
558}
559
560static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject clazz,
561        OpenGLRenderer* renderer, jstring text, jint start, jint end,
562        jfloat x, jfloat y, jint flags, SkPaint* paint) {
563    const jchar* textArray = env->GetStringChars(text, NULL);
564    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
565    env->ReleaseStringChars(text, textArray);
566}
567
568static void android_view_GLES20Canvas_drawTextArrayOnPath(JNIEnv* env, jobject clazz,
569        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
570        SkPath* path, jfloat hOffset, jfloat vOffset, jint flags, SkPaint* paint) {
571    jchar* textArray = env->GetCharArrayElements(text, NULL);
572    renderTextOnPath(renderer, textArray + index, count, path,
573            hOffset, vOffset, flags, paint);
574    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
575}
576
577static void android_view_GLES20Canvas_drawTextOnPath(JNIEnv* env, jobject clazz,
578        OpenGLRenderer* renderer, jstring text, jint start, jint end,
579        SkPath* path, jfloat hOffset, jfloat vOffset, jint flags, SkPaint* paint) {
580    const jchar* textArray = env->GetStringChars(text, NULL);
581    renderTextOnPath(renderer, textArray + start, end - start, path,
582            hOffset, vOffset, flags, paint);
583    env->ReleaseStringChars(text, textArray);
584}
585
586static void android_view_GLES20Canvas_drawTextRunArray(JNIEnv* env, jobject clazz,
587        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
588        jint contextIndex, jint contextCount, jfloat x, jfloat y, jint dirFlags,
589        SkPaint* paint) {
590    jchar* textArray = env->GetCharArrayElements(text, NULL);
591    renderTextRun(renderer, textArray + contextIndex, index - contextIndex,
592            count, contextCount, x, y, dirFlags, paint);
593    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
594 }
595
596static void android_view_GLES20Canvas_drawTextRun(JNIEnv* env, jobject clazz,
597        OpenGLRenderer* renderer, jstring text, jint start, jint end,
598        jint contextStart, int contextEnd, jfloat x, jfloat y, jint dirFlags,
599        SkPaint* paint) {
600    const jchar* textArray = env->GetStringChars(text, NULL);
601    jint count = end - start;
602    jint contextCount = contextEnd - contextStart;
603    renderTextRun(renderer, textArray + contextStart, start - contextStart,
604            count, contextCount, x, y, dirFlags, paint);
605    env->ReleaseStringChars(text, textArray);
606}
607
608static void renderPosText(OpenGLRenderer* renderer, const jchar* text, int count,
609        const jfloat* positions, jint dirFlags, SkPaint* paint) {
610    sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint,
611            text, 0, count, count, dirFlags);
612    if (value == NULL) {
613        return;
614    }
615    const jchar* glyphs = value->getGlyphs();
616    size_t glyphsCount = value->getGlyphsCount();
617    if (count < int(glyphsCount)) glyphsCount = count;
618    int bytesCount = glyphsCount * sizeof(jchar);
619
620    renderer->drawPosText((const char*) glyphs, bytesCount, glyphsCount, positions, paint);
621}
622
623static void android_view_GLES20Canvas_drawPosTextArray(JNIEnv* env, jobject clazz,
624        OpenGLRenderer* renderer, jcharArray text, jint index, jint count,
625        jfloatArray pos, SkPaint* paint) {
626    jchar* textArray = env->GetCharArrayElements(text, NULL);
627    jfloat* positions = env->GetFloatArrayElements(pos, NULL);
628
629    renderPosText(renderer, textArray + index, count, positions, kBidi_LTR, paint);
630
631    env->ReleaseFloatArrayElements(pos, positions, JNI_ABORT);
632    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
633}
634
635static void android_view_GLES20Canvas_drawPosText(JNIEnv* env, jobject clazz,
636        OpenGLRenderer* renderer, jstring text, jint start, jint end,
637        jfloatArray pos, SkPaint* paint) {
638    const jchar* textArray = env->GetStringChars(text, NULL);
639    jfloat* positions = env->GetFloatArrayElements(pos, NULL);
640
641    renderPosText(renderer, textArray + start, end - start, positions, kBidi_LTR, paint);
642
643    env->ReleaseFloatArrayElements(pos, positions, JNI_ABORT);
644    env->ReleaseStringChars(text, textArray);
645}
646
647// ----------------------------------------------------------------------------
648// Display lists
649// ----------------------------------------------------------------------------
650
651static DisplayList* android_view_GLES20Canvas_getDisplayList(JNIEnv* env,
652        jobject clazz, DisplayListRenderer* renderer, DisplayList* displayList) {
653    return renderer->getDisplayList(displayList);
654}
655
656static jint android_view_GLES20Canvas_getDisplayListSize(JNIEnv* env,
657        jobject clazz, DisplayList* displayList) {
658    return displayList->getSize();
659}
660
661static void android_view_GLES20Canvas_setDisplayListName(JNIEnv* env,
662        jobject clazz, DisplayList* displayList, jstring name) {
663    if (name != NULL) {
664        const char* textArray = env->GetStringUTFChars(name, NULL);
665        displayList->setName(textArray);
666        env->ReleaseStringUTFChars(name, textArray);
667    }
668}
669
670static OpenGLRenderer* android_view_GLES20Canvas_createDisplayListRenderer(JNIEnv* env,
671        jobject clazz) {
672    return new DisplayListRenderer;
673}
674
675static void android_view_GLES20Canvas_resetDisplayListRenderer(JNIEnv* env,
676        jobject clazz, DisplayListRenderer* renderer) {
677    renderer->reset();
678}
679
680static void android_view_GLES20Canvas_destroyDisplayList(JNIEnv* env,
681        jobject clazz, DisplayList* displayList) {
682    delete displayList;
683}
684
685static bool android_view_GLES20Canvas_drawDisplayList(JNIEnv* env,
686        jobject clazz, OpenGLRenderer* renderer, DisplayList* displayList,
687        jint width, jint height, jobject dirty, jint flags) {
688    android::uirenderer::Rect bounds;
689    bool redraw = renderer->drawDisplayList(displayList, width, height, bounds, flags);
690    if (redraw && dirty != NULL) {
691        env->CallVoidMethod(dirty, gRectClassInfo.set,
692                int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
693    }
694    return redraw;
695}
696
697static void android_view_GLES20Canvas_outputDisplayList(JNIEnv* env,
698        jobject clazz, OpenGLRenderer* renderer, DisplayList* displayList) {
699    renderer->outputDisplayList(displayList);
700}
701
702// ----------------------------------------------------------------------------
703// Layers
704// ----------------------------------------------------------------------------
705
706static void android_view_GLES20Canvas_interrupt(JNIEnv* env, jobject clazz,
707        OpenGLRenderer* renderer) {
708    renderer->interrupt();
709}
710
711static void android_view_GLES20Canvas_resume(JNIEnv* env, jobject clazz,
712        OpenGLRenderer* renderer) {
713    renderer->resume();
714}
715
716static OpenGLRenderer* android_view_GLES20Canvas_createLayerRenderer(JNIEnv* env,
717        jobject clazz, Layer* layer) {
718    if (layer) {
719        return new LayerRenderer(layer);
720    }
721    return NULL;
722}
723
724static Layer* android_view_GLES20Canvas_createTextureLayer(JNIEnv* env, jobject clazz,
725        jboolean isOpaque, jintArray layerInfo) {
726    Layer* layer = LayerRenderer::createTextureLayer(isOpaque);
727
728    if (layer) {
729        jint* storage = env->GetIntArrayElements(layerInfo, NULL);
730        storage[0] = layer->getTexture();
731        env->ReleaseIntArrayElements(layerInfo, storage, 0);
732    }
733
734    return layer;
735}
736
737static Layer* android_view_GLES20Canvas_createLayer(JNIEnv* env, jobject clazz,
738        jint width, jint height, jboolean isOpaque, jintArray layerInfo) {
739    Layer* layer = LayerRenderer::createLayer(width, height, isOpaque);
740
741    if (layer) {
742        jint* storage = env->GetIntArrayElements(layerInfo, NULL);
743        storage[0] = layer->getWidth();
744        storage[1] = layer->getHeight();
745        env->ReleaseIntArrayElements(layerInfo, storage, 0);
746    }
747
748    return layer;
749}
750
751static void android_view_GLES20Canvas_resizeLayer(JNIEnv* env, jobject clazz,
752        Layer* layer, jint width, jint height, jintArray layerInfo) {
753    LayerRenderer::resizeLayer(layer, width, height);
754
755    jint* storage = env->GetIntArrayElements(layerInfo, NULL);
756    storage[0] = layer->getWidth();
757    storage[1] = layer->getHeight();
758    env->ReleaseIntArrayElements(layerInfo, storage, 0);
759}
760
761static void android_view_GLES20Canvas_updateTextureLayer(JNIEnv* env, jobject clazz,
762        Layer* layer, jint width, jint height, jboolean isOpaque, jobject surface) {
763    float transform[16];
764    sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, surface));
765
766    surfaceTexture->updateTexImage();
767    surfaceTexture->getTransformMatrix(transform);
768    GLenum renderTarget = surfaceTexture->getCurrentTextureTarget();
769
770    LayerRenderer::updateTextureLayer(layer, width, height, isOpaque, renderTarget, transform);
771}
772
773static void android_view_GLES20Canvas_setTextureLayerTransform(JNIEnv* env, jobject clazz,
774        Layer* layer, SkMatrix* matrix) {
775
776    layer->getTransform().load(*matrix);
777}
778
779static void android_view_GLES20Canvas_destroyLayer(JNIEnv* env, jobject clazz, Layer* layer) {
780    LayerRenderer::destroyLayer(layer);
781}
782
783static void android_view_GLES20Canvas_destroyLayerDeferred(JNIEnv* env,
784        jobject clazz, Layer* layer) {
785    LayerRenderer::destroyLayerDeferred(layer);
786}
787
788static void android_view_GLES20Canvas_flushLayer(JNIEnv* env, jobject clazz, Layer* layer) {
789    LayerRenderer::flushLayer(layer);
790}
791
792static void android_view_GLES20Canvas_drawLayer(JNIEnv* env, jobject clazz,
793        OpenGLRenderer* renderer, Layer* layer, jfloat x, jfloat y, SkPaint* paint) {
794    renderer->drawLayer(layer, x, y, paint);
795}
796
797static jboolean android_view_GLES20Canvas_copyLayer(JNIEnv* env, jobject clazz,
798        Layer* layer, SkBitmap* bitmap) {
799    return LayerRenderer::copyLayer(layer, bitmap);
800}
801
802#endif // USE_OPENGL_RENDERER
803
804// ----------------------------------------------------------------------------
805// Common
806// ----------------------------------------------------------------------------
807
808static jboolean android_view_GLES20Canvas_isAvailable(JNIEnv* env, jobject clazz) {
809#ifdef USE_OPENGL_RENDERER
810    char prop[PROPERTY_VALUE_MAX];
811    if (property_get("ro.kernel.qemu", prop, NULL) == 0) {
812        // not in the emulator
813        return JNI_TRUE;
814    }
815    // In the emulator this property will be set to 1 when hardware GLES is
816    // enabled, 0 otherwise. On old emulator versions it will be undefined.
817    property_get("ro.kernel.qemu.gles", prop, "0");
818    return atoi(prop) == 1 ? JNI_TRUE : JNI_FALSE;
819#else
820    return JNI_FALSE;
821#endif
822}
823
824// ----------------------------------------------------------------------------
825// Logging
826// ----------------------------------------------------------------------------
827
828static void
829android_app_ActivityThread_dumpGraphics(JNIEnv* env, jobject clazz, jobject javaFileDescriptor) {
830#ifdef USE_OPENGL_RENDERER
831    int fd = jniGetFDFromFileDescriptor(env, javaFileDescriptor);
832    android::uirenderer::DisplayList::outputLogBuffer(fd);
833#endif // USE_OPENGL_RENDERER
834}
835
836// ----------------------------------------------------------------------------
837// JNI Glue
838// ----------------------------------------------------------------------------
839
840const char* const kClassPathName = "android/view/GLES20Canvas";
841
842static JNINativeMethod gMethods[] = {
843    { "nIsAvailable",       "()Z",             (void*) android_view_GLES20Canvas_isAvailable },
844
845#ifdef USE_OPENGL_RENDERER
846    { "nIsBackBufferPreserved", "()Z",         (void*) android_view_GLES20Canvas_isBackBufferPreserved },
847    { "nPreserveBackBuffer",    "()Z",         (void*) android_view_GLES20Canvas_preserveBackBuffer },
848    { "nDisableVsync",          "()V",         (void*) android_view_GLES20Canvas_disableVsync },
849    { "nFlushCaches",           "(I)V",        (void*) android_view_GLES20Canvas_flushCaches },
850    { "nInitCaches",            "()V",         (void*) android_view_GLES20Canvas_initCaches },
851    { "nTerminateCaches",       "()V",         (void*) android_view_GLES20Canvas_terminateCaches },
852
853    { "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
854    { "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
855    { "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
856    { "nPrepare",           "(IZ)V",           (void*) android_view_GLES20Canvas_prepare },
857    { "nPrepareDirty",      "(IIIIIZ)V",       (void*) android_view_GLES20Canvas_prepareDirty },
858    { "nFinish",            "(I)V",            (void*) android_view_GLES20Canvas_finish },
859
860    { "nGetStencilSize",    "()I",             (void*) android_view_GLES20Canvas_getStencilSize },
861
862    { "nCallDrawGLFunction", "(II)Z",
863            (void*) android_view_GLES20Canvas_callDrawGLFunction },
864
865    { "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
866    { "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
867    { "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
868    { "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
869
870    { "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
871    { "nSaveLayer",         "(III)I",          (void*) android_view_GLES20Canvas_saveLayerClip },
872    { "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
873    { "nSaveLayerAlpha",    "(III)I",          (void*) android_view_GLES20Canvas_saveLayerAlphaClip },
874
875    { "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
876    { "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
877    { "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
878
879    { "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
880    { "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
881    { "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
882    { "nSkew",              "(IFF)V",          (void*) android_view_GLES20Canvas_skew },
883
884    { "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
885    { "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
886    { "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
887
888    { "nDrawBitmap",        "(II[BFFI)V",      (void*) android_view_GLES20Canvas_drawBitmap },
889    { "nDrawBitmap",        "(II[BFFFFFFFFI)V",(void*) android_view_GLES20Canvas_drawBitmapRect },
890    { "nDrawBitmap",        "(II[BII)V",       (void*) android_view_GLES20Canvas_drawBitmapMatrix },
891
892    { "nDrawBitmapMesh",    "(II[BII[FI[III)V",(void*) android_view_GLES20Canvas_drawBitmapMesh },
893
894    { "nDrawPatch",         "(II[B[BFFFFI)V",  (void*) android_view_GLES20Canvas_drawPatch },
895
896    { "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
897    { "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
898    { "nDrawRects",         "(III)V",          (void*) android_view_GLES20Canvas_drawRects },
899    { "nDrawRoundRect",     "(IFFFFFFI)V",     (void*) android_view_GLES20Canvas_drawRoundRect },
900    { "nDrawCircle",        "(IFFFI)V",        (void*) android_view_GLES20Canvas_drawCircle },
901    { "nDrawOval",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawOval },
902    { "nDrawArc",           "(IFFFFFFZI)V",    (void*) android_view_GLES20Canvas_drawArc },
903    { "nDrawPoints",        "(I[FIII)V",       (void*) android_view_GLES20Canvas_drawPoints },
904
905    { "nDrawPath",          "(III)V",          (void*) android_view_GLES20Canvas_drawPath },
906    { "nDrawLines",         "(I[FIII)V",       (void*) android_view_GLES20Canvas_drawLines },
907
908    { "nResetModifiers",    "(II)V",           (void*) android_view_GLES20Canvas_resetModifiers },
909    { "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
910    { "nSetupColorFilter",  "(II)V",           (void*) android_view_GLES20Canvas_setupColorFilter },
911    { "nSetupShadow",       "(IFFFI)V",        (void*) android_view_GLES20Canvas_setupShadow },
912
913    { "nSetupPaintFilter",  "(III)V",          (void*) android_view_GLES20Canvas_setupPaintFilter },
914    { "nResetPaintFilter",  "(I)V",            (void*) android_view_GLES20Canvas_resetPaintFilter },
915
916    { "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
917    { "nDrawText",          "(ILjava/lang/String;IIFFII)V",
918            (void*) android_view_GLES20Canvas_drawText },
919
920    { "nDrawTextOnPath",    "(I[CIIIFFII)V",   (void*) android_view_GLES20Canvas_drawTextArrayOnPath },
921    { "nDrawTextOnPath",    "(ILjava/lang/String;IIIFFII)V",
922            (void*) android_view_GLES20Canvas_drawTextOnPath },
923
924    { "nDrawTextRun",       "(I[CIIIIFFII)V",  (void*) android_view_GLES20Canvas_drawTextRunArray },
925    { "nDrawTextRun",       "(ILjava/lang/String;IIIIFFII)V",
926            (void*) android_view_GLES20Canvas_drawTextRun },
927
928    { "nDrawPosText",       "(I[CII[FI)V",     (void*) android_view_GLES20Canvas_drawPosTextArray },
929    { "nDrawPosText",       "(ILjava/lang/String;II[FI)V",
930            (void*) android_view_GLES20Canvas_drawPosText },
931
932    { "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
933            (void*) android_view_GLES20Canvas_getClipBounds },
934
935    { "nGetDisplayList",         "(II)I",      (void*) android_view_GLES20Canvas_getDisplayList },
936    { "nDestroyDisplayList",     "(I)V",       (void*) android_view_GLES20Canvas_destroyDisplayList },
937    { "nGetDisplayListSize",     "(I)I",       (void*) android_view_GLES20Canvas_getDisplayListSize },
938    { "nSetDisplayListName",     "(ILjava/lang/String;)V",
939                                               (void*) android_view_GLES20Canvas_setDisplayListName },
940    { "nDrawDisplayList",        "(IIIILandroid/graphics/Rect;I)Z",
941                                               (void*) android_view_GLES20Canvas_drawDisplayList },
942
943    { "nCreateDisplayListRenderer", "()I",     (void*) android_view_GLES20Canvas_createDisplayListRenderer },
944    { "nResetDisplayListRenderer",  "(I)V",    (void*) android_view_GLES20Canvas_resetDisplayListRenderer },
945
946    { "nOutputDisplayList",      "(II)V",      (void*) android_view_GLES20Canvas_outputDisplayList },
947    { "nInterrupt",              "(I)V",       (void*) android_view_GLES20Canvas_interrupt },
948    { "nResume",                 "(I)V",       (void*) android_view_GLES20Canvas_resume },
949
950    { "nCreateLayerRenderer",    "(I)I",       (void*) android_view_GLES20Canvas_createLayerRenderer },
951    { "nCreateLayer",            "(IIZ[I)I",   (void*) android_view_GLES20Canvas_createLayer },
952    { "nResizeLayer",            "(III[I)V" ,  (void*) android_view_GLES20Canvas_resizeLayer },
953    { "nCreateTextureLayer",     "(Z[I)I",     (void*) android_view_GLES20Canvas_createTextureLayer },
954    { "nUpdateTextureLayer",     "(IIIZLandroid/graphics/SurfaceTexture;)V",
955                                               (void*) android_view_GLES20Canvas_updateTextureLayer },
956    { "nSetTextureLayerTransform", "(II)V",    (void*) android_view_GLES20Canvas_setTextureLayerTransform },
957    { "nDestroyLayer",           "(I)V",       (void*) android_view_GLES20Canvas_destroyLayer },
958    { "nDestroyLayerDeferred",   "(I)V",       (void*) android_view_GLES20Canvas_destroyLayerDeferred },
959    { "nFlushLayer",             "(I)V",       (void*) android_view_GLES20Canvas_flushLayer },
960    { "nDrawLayer",              "(IIFFI)V",   (void*) android_view_GLES20Canvas_drawLayer },
961    { "nCopyLayer",              "(II)Z",      (void*) android_view_GLES20Canvas_copyLayer },
962
963    { "nGetMaximumTextureWidth",  "()I",       (void*) android_view_GLES20Canvas_getMaxTextureWidth },
964    { "nGetMaximumTextureHeight", "()I",       (void*) android_view_GLES20Canvas_getMaxTextureHeight },
965
966#endif
967};
968
969static JNINativeMethod gActivityThreadMethods[] = {
970    { "dumpGraphicsInfo",        "(Ljava/io/FileDescriptor;)V",
971                                               (void*) android_app_ActivityThread_dumpGraphics }
972};
973
974
975#ifdef USE_OPENGL_RENDERER
976    #define FIND_CLASS(var, className) \
977            var = env->FindClass(className); \
978            LOG_FATAL_IF(! var, "Unable to find class " className);
979
980    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
981            var = env->GetMethodID(clazz, methodName, methodDescriptor); \
982            LOG_FATAL_IF(! var, "Unable to find method " methodName);
983#else
984    #define FIND_CLASS(var, className)
985    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor)
986#endif
987
988int register_android_view_GLES20Canvas(JNIEnv* env) {
989    jclass clazz;
990    FIND_CLASS(clazz, "android/graphics/Rect");
991    GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V");
992
993    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
994}
995
996const char* const kActivityThreadPathName = "android/app/ActivityThread";
997
998int register_android_app_ActivityThread(JNIEnv* env) {
999    return AndroidRuntime::registerNativeMethods(env, kActivityThreadPathName,
1000            gActivityThreadMethods, NELEM(gActivityThreadMethods));
1001}
1002
1003};
1004