android_view_GLES20Canvas.cpp revision b051e895ccb696604349c6c5efe7c4747e1d1ab6 
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#define DEBUG_RENDERER 0
54
55// ----------------------------------------------------------------------------
56// Java APIs
57// ----------------------------------------------------------------------------
58
59static struct {
60    jclass clazz;
61    jmethodID set;
62} gRectClassInfo;
63
64// ----------------------------------------------------------------------------
65// Constructors
66// ----------------------------------------------------------------------------
67
68static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
69#if DEBUG_RENDERER
70    return new OpenGLDebugRenderer;
71#else
72    return new OpenGLRenderer;
73#endif
74}
75
76static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
77        OpenGLRenderer* renderer) {
78    delete renderer;
79}
80
81// ----------------------------------------------------------------------------
82// Setup
83// ----------------------------------------------------------------------------
84
85static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
86        OpenGLRenderer* renderer, jint width, jint height) {
87    renderer->setViewport(width, height);
88}
89
90static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
91        OpenGLRenderer* renderer) {
92    renderer->prepare();
93}
94
95static void android_view_GLES20Canvas_finish(JNIEnv* env, jobject canvas,
96        OpenGLRenderer* renderer) {
97    renderer->finish();
98}
99
100static void android_view_GLES20Canvas_acquireContext(JNIEnv* env, jobject canvas,
101        OpenGLRenderer* renderer) {
102    renderer->acquireContext();
103}
104
105static void android_view_GLES20Canvas_releaseContext(JNIEnv* env, jobject canvas,
106        OpenGLRenderer* renderer) {
107    renderer->releaseContext();
108}
109
110// ----------------------------------------------------------------------------
111// State
112// ----------------------------------------------------------------------------
113
114static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
115        jint flags) {
116    return renderer->save(flags);
117}
118
119static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
120        OpenGLRenderer* renderer) {
121    return renderer->getSaveCount();
122}
123
124static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
125        OpenGLRenderer* renderer) {
126    renderer->restore();
127}
128
129static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
130        OpenGLRenderer* renderer, jint saveCount) {
131    renderer->restoreToCount(saveCount);
132}
133
134// ----------------------------------------------------------------------------
135// Layers
136// ----------------------------------------------------------------------------
137
138static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
139        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
140        SkPaint* paint, jint saveFlags) {
141    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
142}
143
144static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
145        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
146        jint alpha, jint saveFlags) {
147    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
148}
149
150// ----------------------------------------------------------------------------
151// Clipping
152// ----------------------------------------------------------------------------
153
154static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
155        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
156        SkCanvas::EdgeType edge) {
157    return renderer->quickReject(left, top, right, bottom);
158}
159
160static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
161        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
162        SkRegion::Op op) {
163    return renderer->clipRect(left, top, right, bottom, op);
164}
165
166static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
167        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
168        SkRegion::Op op) {
169    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
170}
171
172static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
173        OpenGLRenderer* renderer, jobject rect) {
174    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
175
176    env->CallVoidMethod(rect, gRectClassInfo.set,
177            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
178
179    return !bounds.isEmpty();
180}
181
182// ----------------------------------------------------------------------------
183// Transforms
184// ----------------------------------------------------------------------------
185
186static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
187        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
188    renderer->translate(dx, dy);
189}
190
191static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
192        OpenGLRenderer* renderer, jfloat degrees) {
193    renderer->rotate(degrees);
194}
195
196static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
197        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
198    renderer->scale(sx, sy);
199}
200
201static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
202        OpenGLRenderer* renderer, SkMatrix* matrix) {
203    renderer->setMatrix(matrix);
204}
205
206static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
207        OpenGLRenderer* renderer, SkMatrix* matrix) {
208    renderer->getMatrix(matrix);
209}
210
211static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
212        OpenGLRenderer* renderer, SkMatrix* matrix) {
213    renderer->concatMatrix(matrix);
214}
215
216// ----------------------------------------------------------------------------
217// Drawing
218// ----------------------------------------------------------------------------
219
220static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
221        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
222    renderer->drawBitmap(bitmap, left, top, paint);
223}
224
225static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
226        OpenGLRenderer* renderer, SkBitmap* bitmap,
227        float srcLeft, float srcTop, float srcRight, float srcBottom,
228        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
229    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
230            dstLeft, dstTop, dstRight, dstBottom, paint);
231}
232
233static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
234        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
235    renderer->drawBitmap(bitmap, matrix, paint);
236}
237
238static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
239        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
240        float left, float top, float right, float bottom, SkPaint* paint) {
241    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
242    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
243    Res_png_9patch::deserialize(patch);
244
245    renderer->drawPatch(bitmap, &patch->xDivs[0], &patch->yDivs[0],
246            patch->numXDivs, patch->numYDivs, left, top, right, bottom, paint);
247
248    env->ReleaseByteArrayElements(chunks, storage, 0);
249}
250
251static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
252        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
253    renderer->drawColor(color, mode);
254}
255
256static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
257        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
258        SkPaint* paint) {
259    renderer->drawRect(left, top, right, bottom, paint);
260}
261
262static void android_view_GLES20Canvas_drawRects(JNIEnv* env, jobject canvas,
263        OpenGLRenderer* renderer, SkRegion* region, SkPaint* paint) {
264    SkRegion::Iterator it(*region);
265    while (!it.done()) {
266        const SkIRect& r = it.rect();
267        renderer->drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
268        it.next();
269    }
270}
271
272static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject canvas,
273        OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) {
274    renderer->drawPath(path, paint);
275}
276
277static void android_view_GLES20Canvas_drawLines(JNIEnv* env, jobject canvas,
278        OpenGLRenderer* renderer, jfloatArray points, jint offset, jint count, SkPaint* paint) {
279    jfloat* storage = env->GetFloatArrayElements(points, NULL);
280
281    renderer->drawLines(storage + offset, count, paint);
282
283    env->ReleaseFloatArrayElements(points, storage, 0);
284}
285
286// ----------------------------------------------------------------------------
287// Shaders and color filters
288// ----------------------------------------------------------------------------
289
290static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject canvas,
291        OpenGLRenderer* renderer) {
292    renderer->resetShader();
293    renderer->resetColorFilter();
294    renderer->resetShadow();
295}
296
297static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas,
298        OpenGLRenderer* renderer, SkiaShader* shader) {
299    renderer->setupShader(shader);
300}
301
302static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject canvas,
303        OpenGLRenderer* renderer, SkiaColorFilter* filter) {
304    renderer->setupColorFilter(filter);
305}
306
307static void android_view_GLES20Canvas_setupShadow(JNIEnv* env, jobject canvas,
308        OpenGLRenderer* renderer, jfloat radius, jfloat dx, jfloat dy, jint color) {
309    renderer->setupShadow(radius, dx, dy, color);
310}
311
312// ----------------------------------------------------------------------------
313// Text
314// ----------------------------------------------------------------------------
315
316static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
317        jfloat x, jfloat y, int flags, SkPaint* paint) {
318    const jchar *workText;
319    jchar* buffer = NULL;
320    int32_t workBytes;
321    if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) {
322        renderer->drawText((const char*) workText, workBytes, count, x, y, paint);
323        free(buffer);
324    }
325}
326
327static void renderTextRun(OpenGLRenderer* renderer, const jchar* text,
328        jint start, jint count, jint contextCount, jfloat x, jfloat y,
329        int flags, SkPaint* paint) {
330    uint8_t rtl = flags & 0x1;
331    if (rtl) {
332        SkAutoSTMalloc<80, jchar> buffer(contextCount);
333        jchar* shaped = buffer.get();
334        if (TextLayout::prepareRtlTextRun(text, start, count, contextCount, shaped)) {
335            renderer->drawText((const char*) shaped, count << 1, count, x, y, paint);
336        } else {
337            LOGW("drawTextRun error");
338        }
339    } else {
340        renderer->drawText((const char*) (text + start), count << 1, count, x, y, paint);
341    }
342}
343
344static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas,
345        OpenGLRenderer* renderer, jcharArray text, int index, int count,
346        jfloat x, jfloat y, int flags, SkPaint* paint) {
347    jchar* textArray = env->GetCharArrayElements(text, NULL);
348    renderText(renderer, textArray + index, count, x, y, flags, paint);
349    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
350}
351
352static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas,
353        OpenGLRenderer* renderer, jstring text, int start, int end,
354        jfloat x, jfloat y, int flags, SkPaint* paint) {
355    const jchar* textArray = env->GetStringChars(text, NULL);
356    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
357    env->ReleaseStringChars(text, textArray);
358}
359
360static void android_view_GLES20Canvas_drawTextRunArray(JNIEnv* env, jobject canvas,
361        OpenGLRenderer* renderer, jcharArray text, int index, int count,
362        int contextIndex, int contextCount, jfloat x, jfloat y, int dirFlags,
363        SkPaint* paint) {
364    jchar* textArray = env->GetCharArrayElements(text, NULL);
365    renderTextRun(renderer, textArray + contextIndex, index - contextIndex,
366            count, contextCount, x, y, dirFlags, paint);
367    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
368 }
369
370static void android_view_GLES20Canvas_drawTextRun(JNIEnv* env, jobject canvas,
371        OpenGLRenderer* renderer, jstring text, int start, int end,
372        int contextStart, int contextEnd, jfloat x, jfloat y, int dirFlags,
373        SkPaint* paint) {
374    const jchar* textArray = env->GetStringChars(text, NULL);
375    jint count = end - start;
376    jint contextCount = contextEnd - contextStart;
377    renderTextRun(renderer, textArray + contextStart, start - contextStart,
378            count, contextCount, x, y, dirFlags, paint);
379    env->ReleaseStringChars(text, textArray);
380}
381
382// ----------------------------------------------------------------------------
383// Display lists
384// ----------------------------------------------------------------------------
385
386static OpenGLRenderer* android_view_GLES20Canvas_createDisplayListRenderer(
387        JNIEnv* env, jobject canvas) {
388    return new DisplayListRenderer;
389}
390
391static DisplayList* android_view_GLES20Canvas_createDisplayList(JNIEnv* env,
392        jobject canvas, DisplayListRenderer* renderer) {
393    return renderer->getDisplayList();
394}
395
396static void android_view_GLES20Canvas_destroyDisplayList(JNIEnv* env,
397        jobject canvas, DisplayList* displayList) {
398    delete displayList;
399}
400
401static void android_view_GLES20Canvas_drawDisplayList(JNIEnv* env,
402        jobject canvas, OpenGLRenderer* renderer, DisplayList* displayList) {
403    displayList->replay(*renderer);
404}
405
406#endif // USE_OPENGL_RENDERER
407
408// ----------------------------------------------------------------------------
409// Common
410// ----------------------------------------------------------------------------
411
412static jboolean android_view_GLES20Canvas_isAvailable(JNIEnv* env, jobject clazz) {
413#ifdef USE_OPENGL_RENDERER
414    return JNI_TRUE;
415#else
416    return JNI_FALSE;
417#endif
418}
419
420// ----------------------------------------------------------------------------
421// JNI Glue
422// ----------------------------------------------------------------------------
423
424const char* const kClassPathName = "android/view/GLES20Canvas";
425
426static JNINativeMethod gMethods[] = {
427    { "nIsAvailable",       "()Z",             (void*) android_view_GLES20Canvas_isAvailable },
428
429#ifdef USE_OPENGL_RENDERER
430    { "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
431    { "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
432    { "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
433    { "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
434    { "nFinish",            "(I)V",            (void*) android_view_GLES20Canvas_finish },
435    { "nAcquireContext",    "(I)V",            (void*) android_view_GLES20Canvas_acquireContext },
436    { "nReleaseContext",    "(I)V",            (void*) android_view_GLES20Canvas_releaseContext },
437
438    { "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
439    { "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
440    { "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
441    { "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
442
443    { "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
444    { "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
445
446    { "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
447    { "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
448    { "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
449
450    { "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
451    { "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
452    { "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
453
454    { "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
455    { "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
456    { "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
457
458    { "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
459    { "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
460    { "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
461    { "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
462    { "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
463    { "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
464    { "nDrawRects",         "(III)V",          (void*) android_view_GLES20Canvas_drawRects },
465    { "nDrawPath",          "(III)V",          (void*) android_view_GLES20Canvas_drawPath },
466    { "nDrawLines",         "(I[FIII)V",       (void*) android_view_GLES20Canvas_drawLines },
467
468    { "nResetModifiers",    "(I)V",            (void*) android_view_GLES20Canvas_resetModifiers },
469    { "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
470    { "nSetupColorFilter",  "(II)V",           (void*) android_view_GLES20Canvas_setupColorFilter },
471    { "nSetupShadow",       "(IFFFI)V",        (void*) android_view_GLES20Canvas_setupShadow },
472
473    { "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
474    { "nDrawText",          "(ILjava/lang/String;IIFFII)V",
475            (void*) android_view_GLES20Canvas_drawText },
476
477    { "nDrawTextRun",       "(I[CIIIIFFII)V",  (void*) android_view_GLES20Canvas_drawTextRunArray },
478    { "nDrawTextRun",       "(ILjava/lang/String;IIIIFFII)V",
479            (void*) android_view_GLES20Canvas_drawTextRun },
480
481    { "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
482            (void*) android_view_GLES20Canvas_getClipBounds },
483
484    { "nCreateDisplayListRenderer", "()I",     (void*) android_view_GLES20Canvas_createDisplayListRenderer },
485    { "nCreateDisplayList",  "(I)I",           (void*) android_view_GLES20Canvas_createDisplayList },
486    { "nDestroyDisplayList", "(I)V",           (void*) android_view_GLES20Canvas_destroyDisplayList },
487    { "nDrawDisplayList",    "(II)V",          (void*) android_view_GLES20Canvas_drawDisplayList },
488
489#endif
490};
491
492#ifdef USE_OPENGL_RENDERER
493    #define FIND_CLASS(var, className) \
494            var = env->FindClass(className); \
495            LOG_FATAL_IF(! var, "Unable to find class " className); \
496            var = jclass(env->NewGlobalRef(var));
497
498    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
499            var = env->GetMethodID(clazz, methodName, methodDescriptor); \
500            LOG_FATAL_IF(! var, "Unable to find method " methodName);
501#else
502    #define FIND_CLASS(var, className)
503    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor)
504#endif
505
506int register_android_view_GLES20Canvas(JNIEnv* env) {
507    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
508    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
509
510    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
511}
512
513};
514