android_view_GLES20Canvas.cpp revision 4bb942083a0d4db746adf95349108dd8ef842e32 
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 "jni.h"
20#include <nativehelper/JNIHelp.h>
21#include <android_runtime/AndroidRuntime.h>
22#include <utils/ResourceTypes.h>
23
24#include <SkBitmap.h>
25#include <SkCanvas.h>
26#include <SkMatrix.h>
27#include <SkPaint.h>
28#include <SkRegion.h>
29#include <SkScalerContext.h>
30#include <SkTemplates.h>
31#include <SkXfermode.h>
32
33#include <DisplayListRenderer.h>
34#include <OpenGLDebugRenderer.h>
35#include <OpenGLRenderer.h>
36#include <SkiaShader.h>
37#include <SkiaColorFilter.h>
38#include <Rect.h>
39
40#include "TextLayout.h"
41
42namespace android {
43
44using namespace uirenderer;
45
46/**
47 * Note: OpenGLRenderer JNI layer is generated and compiled only on supported
48 *       devices. This means all the logic must be compiled only when the
49 *       preprocessor variable USE_OPENGL_RENDERER is defined.
50 */
51#ifdef USE_OPENGL_RENDERER
52
53///////////////////////////////////////////////////////////////////////////////
54// Defines
55///////////////////////////////////////////////////////////////////////////////
56
57// Debug
58#define DEBUG_RENDERER 0
59#define PROFILE_RENDERER 0
60
61// Debug
62#if DEBUG_RENDERER
63    #define RENDERER_LOGD(...) LOGD(__VA_ARGS__)
64#else
65    #define RENDERER_LOGD(...)
66#endif
67
68// ----------------------------------------------------------------------------
69// Java APIs
70// ----------------------------------------------------------------------------
71
72static struct {
73    jclass clazz;
74    jmethodID set;
75} gRectClassInfo;
76
77// ----------------------------------------------------------------------------
78// Constructors
79// ----------------------------------------------------------------------------
80
81static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
82    RENDERER_LOGD("Create OpenGLRenderer");
83#if PROFILE_RENDERER
84    return new OpenGLDebugRenderer;
85#else
86    return new OpenGLRenderer;
87#endif
88}
89
90static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
91        OpenGLRenderer* renderer) {
92    RENDERER_LOGD("Destroy OpenGLRenderer");
93    delete renderer;
94}
95
96// ----------------------------------------------------------------------------
97// Setup
98// ----------------------------------------------------------------------------
99
100static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
101        OpenGLRenderer* renderer, jint width, jint height) {
102    renderer->setViewport(width, height);
103}
104
105static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
106        OpenGLRenderer* renderer, jboolean opaque) {
107    renderer->prepare(opaque);
108}
109
110static void android_view_GLES20Canvas_finish(JNIEnv* env, jobject canvas,
111        OpenGLRenderer* renderer) {
112    renderer->finish();
113}
114
115static void android_view_GLES20Canvas_acquireContext(JNIEnv* env, jobject canvas,
116        OpenGLRenderer* renderer) {
117    renderer->acquireContext();
118}
119
120static void android_view_GLES20Canvas_releaseContext(JNIEnv* env, jobject canvas,
121        OpenGLRenderer* renderer) {
122    renderer->releaseContext();
123}
124
125// ----------------------------------------------------------------------------
126// State
127// ----------------------------------------------------------------------------
128
129static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
130        jint flags) {
131    return renderer->save(flags);
132}
133
134static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
135        OpenGLRenderer* renderer) {
136    return renderer->getSaveCount();
137}
138
139static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
140        OpenGLRenderer* renderer) {
141    renderer->restore();
142}
143
144static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
145        OpenGLRenderer* renderer, jint saveCount) {
146    renderer->restoreToCount(saveCount);
147}
148
149// ----------------------------------------------------------------------------
150// Layers
151// ----------------------------------------------------------------------------
152
153static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
154        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
155        SkPaint* paint, jint saveFlags) {
156    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
157}
158
159static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
160        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
161        jint alpha, jint saveFlags) {
162    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
163}
164
165// ----------------------------------------------------------------------------
166// Clipping
167// ----------------------------------------------------------------------------
168
169static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
170        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
171        SkCanvas::EdgeType edge) {
172    return renderer->quickReject(left, top, right, bottom);
173}
174
175static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
176        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
177        SkRegion::Op op) {
178    return renderer->clipRect(left, top, right, bottom, op);
179}
180
181static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
182        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
183        SkRegion::Op op) {
184    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
185}
186
187static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
188        OpenGLRenderer* renderer, jobject rect) {
189    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
190
191    env->CallVoidMethod(rect, gRectClassInfo.set,
192            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
193
194    return !bounds.isEmpty();
195}
196
197// ----------------------------------------------------------------------------
198// Transforms
199// ----------------------------------------------------------------------------
200
201static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
202        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
203    renderer->translate(dx, dy);
204}
205
206static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
207        OpenGLRenderer* renderer, jfloat degrees) {
208    renderer->rotate(degrees);
209}
210
211static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
212        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
213    renderer->scale(sx, sy);
214}
215
216static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
217        OpenGLRenderer* renderer, SkMatrix* matrix) {
218    renderer->setMatrix(matrix);
219}
220
221static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
222        OpenGLRenderer* renderer, SkMatrix* matrix) {
223    renderer->getMatrix(matrix);
224}
225
226static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
227        OpenGLRenderer* renderer, SkMatrix* matrix) {
228    renderer->concatMatrix(matrix);
229}
230
231// ----------------------------------------------------------------------------
232// Drawing
233// ----------------------------------------------------------------------------
234
235static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
236        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
237    renderer->drawBitmap(bitmap, left, top, paint);
238}
239
240static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
241        OpenGLRenderer* renderer, SkBitmap* bitmap,
242        float srcLeft, float srcTop, float srcRight, float srcBottom,
243        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
244    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
245            dstLeft, dstTop, dstRight, dstBottom, paint);
246}
247
248static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
249        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
250    renderer->drawBitmap(bitmap, matrix, paint);
251}
252
253static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
254        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
255        float left, float top, float right, float bottom, SkPaint* paint) {
256    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
257    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
258    Res_png_9patch::deserialize(patch);
259
260    renderer->drawPatch(bitmap, &patch->xDivs[0], &patch->yDivs[0], &patch->colors[0],
261            patch->numXDivs, patch->numYDivs, patch->numColors,
262            left, top, right, bottom, paint);
263
264    env->ReleaseByteArrayElements(chunks, storage, 0);
265}
266
267static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
268        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
269    renderer->drawColor(color, mode);
270}
271
272static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
273        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
274        SkPaint* paint) {
275    renderer->drawRect(left, top, right, bottom, paint);
276}
277
278static void android_view_GLES20Canvas_drawRects(JNIEnv* env, jobject canvas,
279        OpenGLRenderer* renderer, SkRegion* region, SkPaint* paint) {
280    SkRegion::Iterator it(*region);
281    while (!it.done()) {
282        const SkIRect& r = it.rect();
283        renderer->drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
284        it.next();
285    }
286}
287
288static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject canvas,
289        OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) {
290    renderer->drawPath(path, paint);
291}
292
293static void android_view_GLES20Canvas_drawLines(JNIEnv* env, jobject canvas,
294        OpenGLRenderer* renderer, jfloatArray points, jint offset, jint count, SkPaint* paint) {
295    jfloat* storage = env->GetFloatArrayElements(points, NULL);
296
297    renderer->drawLines(storage + offset, count, paint);
298
299    env->ReleaseFloatArrayElements(points, storage, 0);
300}
301
302// ----------------------------------------------------------------------------
303// Shaders and color filters
304// ----------------------------------------------------------------------------
305
306static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject canvas,
307        OpenGLRenderer* renderer) {
308    renderer->resetShader();
309    renderer->resetColorFilter();
310    renderer->resetShadow();
311}
312
313static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas,
314        OpenGLRenderer* renderer, SkiaShader* shader) {
315    renderer->setupShader(shader);
316}
317
318static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject canvas,
319        OpenGLRenderer* renderer, SkiaColorFilter* filter) {
320    renderer->setupColorFilter(filter);
321}
322
323static void android_view_GLES20Canvas_setupShadow(JNIEnv* env, jobject canvas,
324        OpenGLRenderer* renderer, jfloat radius, jfloat dx, jfloat dy, jint color) {
325    renderer->setupShadow(radius, dx, dy, color);
326}
327
328// ----------------------------------------------------------------------------
329// Text
330// ----------------------------------------------------------------------------
331
332static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
333        jfloat x, jfloat y, int flags, SkPaint* paint) {
334    const jchar *workText;
335    jchar* buffer = NULL;
336    int32_t workBytes;
337    if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) {
338        renderer->drawText((const char*) workText, workBytes, count, x, y, paint);
339        free(buffer);
340    }
341}
342
343static void renderTextRun(OpenGLRenderer* renderer, const jchar* text,
344        jint start, jint count, jint contextCount, jfloat x, jfloat y,
345        int flags, SkPaint* paint) {
346    uint8_t rtl = flags & 0x1;
347    if (rtl) {
348        SkAutoSTMalloc<80, jchar> buffer(contextCount);
349        jchar* shaped = buffer.get();
350        if (TextLayout::prepareRtlTextRun(text, start, count, contextCount, shaped)) {
351            renderer->drawText((const char*) shaped, count << 1, count, x, y, paint);
352        } else {
353            LOGW("drawTextRun error");
354        }
355    } else {
356        renderer->drawText((const char*) (text + start), count << 1, count, x, y, paint);
357    }
358}
359
360static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas,
361        OpenGLRenderer* renderer, jcharArray text, int index, int count,
362        jfloat x, jfloat y, int flags, SkPaint* paint) {
363    jchar* textArray = env->GetCharArrayElements(text, NULL);
364    renderText(renderer, textArray + index, count, x, y, flags, paint);
365    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
366}
367
368static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas,
369        OpenGLRenderer* renderer, jstring text, int start, int end,
370        jfloat x, jfloat y, int flags, SkPaint* paint) {
371    const jchar* textArray = env->GetStringChars(text, NULL);
372    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
373    env->ReleaseStringChars(text, textArray);
374}
375
376static void android_view_GLES20Canvas_drawTextRunArray(JNIEnv* env, jobject canvas,
377        OpenGLRenderer* renderer, jcharArray text, int index, int count,
378        int contextIndex, int contextCount, jfloat x, jfloat y, int dirFlags,
379        SkPaint* paint) {
380    jchar* textArray = env->GetCharArrayElements(text, NULL);
381    renderTextRun(renderer, textArray + contextIndex, index - contextIndex,
382            count, contextCount, x, y, dirFlags, paint);
383    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
384 }
385
386static void android_view_GLES20Canvas_drawTextRun(JNIEnv* env, jobject canvas,
387        OpenGLRenderer* renderer, jstring text, int start, int end,
388        int contextStart, int contextEnd, jfloat x, jfloat y, int dirFlags,
389        SkPaint* paint) {
390    const jchar* textArray = env->GetStringChars(text, NULL);
391    jint count = end - start;
392    jint contextCount = contextEnd - contextStart;
393    renderTextRun(renderer, textArray + contextStart, start - contextStart,
394            count, contextCount, x, y, dirFlags, paint);
395    env->ReleaseStringChars(text, textArray);
396}
397
398// ----------------------------------------------------------------------------
399// Display lists
400// ----------------------------------------------------------------------------
401
402static OpenGLRenderer* android_view_GLES20Canvas_createDisplayListRenderer(
403        JNIEnv* env, jobject canvas) {
404    return new DisplayListRenderer;
405}
406
407static DisplayList* android_view_GLES20Canvas_createDisplayList(JNIEnv* env,
408        jobject canvas, DisplayListRenderer* renderer) {
409    return renderer->getDisplayList();
410}
411
412static void android_view_GLES20Canvas_destroyDisplayList(JNIEnv* env,
413        jobject canvas, DisplayList* displayList) {
414    delete displayList;
415}
416
417static void android_view_GLES20Canvas_drawDisplayList(JNIEnv* env,
418        jobject canvas, OpenGLRenderer* renderer, DisplayList* displayList) {
419    displayList->replay(*renderer);
420}
421
422#endif // USE_OPENGL_RENDERER
423
424// ----------------------------------------------------------------------------
425// Common
426// ----------------------------------------------------------------------------
427
428static jboolean android_view_GLES20Canvas_isAvailable(JNIEnv* env, jobject clazz) {
429#ifdef USE_OPENGL_RENDERER
430    return JNI_TRUE;
431#else
432    return JNI_FALSE;
433#endif
434}
435
436// ----------------------------------------------------------------------------
437// JNI Glue
438// ----------------------------------------------------------------------------
439
440const char* const kClassPathName = "android/view/GLES20Canvas";
441
442static JNINativeMethod gMethods[] = {
443    { "nIsAvailable",       "()Z",             (void*) android_view_GLES20Canvas_isAvailable },
444
445#ifdef USE_OPENGL_RENDERER
446    { "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
447    { "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
448    { "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
449    { "nPrepare",           "(IZ)V",           (void*) android_view_GLES20Canvas_prepare },
450    { "nFinish",            "(I)V",            (void*) android_view_GLES20Canvas_finish },
451    { "nAcquireContext",    "(I)V",            (void*) android_view_GLES20Canvas_acquireContext },
452    { "nReleaseContext",    "(I)V",            (void*) android_view_GLES20Canvas_releaseContext },
453
454    { "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
455    { "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
456    { "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
457    { "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
458
459    { "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
460    { "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
461
462    { "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
463    { "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
464    { "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
465
466    { "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
467    { "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
468    { "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
469
470    { "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
471    { "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
472    { "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
473
474    { "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
475    { "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
476    { "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
477    { "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
478    { "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
479    { "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
480    { "nDrawRects",         "(III)V",          (void*) android_view_GLES20Canvas_drawRects },
481    { "nDrawPath",          "(III)V",          (void*) android_view_GLES20Canvas_drawPath },
482    { "nDrawLines",         "(I[FIII)V",       (void*) android_view_GLES20Canvas_drawLines },
483
484    { "nResetModifiers",    "(I)V",            (void*) android_view_GLES20Canvas_resetModifiers },
485    { "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
486    { "nSetupColorFilter",  "(II)V",           (void*) android_view_GLES20Canvas_setupColorFilter },
487    { "nSetupShadow",       "(IFFFI)V",        (void*) android_view_GLES20Canvas_setupShadow },
488
489    { "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
490    { "nDrawText",          "(ILjava/lang/String;IIFFII)V",
491            (void*) android_view_GLES20Canvas_drawText },
492
493    { "nDrawTextRun",       "(I[CIIIIFFII)V",  (void*) android_view_GLES20Canvas_drawTextRunArray },
494    { "nDrawTextRun",       "(ILjava/lang/String;IIIIFFII)V",
495            (void*) android_view_GLES20Canvas_drawTextRun },
496
497    { "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
498            (void*) android_view_GLES20Canvas_getClipBounds },
499
500    { "nCreateDisplayListRenderer", "()I",     (void*) android_view_GLES20Canvas_createDisplayListRenderer },
501    { "nCreateDisplayList",  "(I)I",           (void*) android_view_GLES20Canvas_createDisplayList },
502    { "nDestroyDisplayList", "(I)V",           (void*) android_view_GLES20Canvas_destroyDisplayList },
503    { "nDrawDisplayList",    "(II)V",          (void*) android_view_GLES20Canvas_drawDisplayList },
504
505#endif
506};
507
508#ifdef USE_OPENGL_RENDERER
509    #define FIND_CLASS(var, className) \
510            var = env->FindClass(className); \
511            LOG_FATAL_IF(! var, "Unable to find class " className); \
512            var = jclass(env->NewGlobalRef(var));
513
514    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
515            var = env->GetMethodID(clazz, methodName, methodDescriptor); \
516            LOG_FATAL_IF(! var, "Unable to find method " methodName);
517#else
518    #define FIND_CLASS(var, className)
519    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor)
520#endif
521
522int register_android_view_GLES20Canvas(JNIEnv* env) {
523    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
524    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
525
526    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
527}
528
529};
530