android_view_GLES20Canvas.cpp revision da8532c6f48b4c10b5e2ccb9e08690341efa1616 
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 <OpenGLRenderer.h>
34#include <SkiaShader.h>
35#include <SkiaColorFilter.h>
36#include <Rect.h>
37
38#include "TextLayout.h"
39
40namespace android {
41
42using namespace uirenderer;
43
44/**
45 * Note: OpenGLRenderer JNI layer is generated and compiled only on supported
46 *       devices. This means all the logic must be compiled only when the
47 *       preprocessor variable USE_OPENGL_RENDERER is defined.
48 */
49#ifdef USE_OPENGL_RENDERER
50
51// ----------------------------------------------------------------------------
52// Java APIs
53// ----------------------------------------------------------------------------
54
55static struct {
56    jclass clazz;
57    jmethodID set;
58} gRectClassInfo;
59
60// ----------------------------------------------------------------------------
61// Constructors
62// ----------------------------------------------------------------------------
63
64static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
65    return new OpenGLRenderer;
66}
67
68static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
69        OpenGLRenderer* renderer) {
70    delete renderer;
71}
72
73// ----------------------------------------------------------------------------
74// Setup
75// ----------------------------------------------------------------------------
76
77static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
78        OpenGLRenderer* renderer, jint width, jint height) {
79    renderer->setViewport(width, height);
80}
81
82static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
83        OpenGLRenderer* renderer) {
84    renderer->prepare();
85}
86
87static void android_view_GLES20Canvas_acquireContext(JNIEnv* env, jobject canvas,
88        OpenGLRenderer* renderer) {
89    renderer->acquireContext();
90}
91
92static void android_view_GLES20Canvas_releaseContext(JNIEnv* env, jobject canvas,
93        OpenGLRenderer* renderer) {
94    renderer->releaseContext();
95}
96
97// ----------------------------------------------------------------------------
98// State
99// ----------------------------------------------------------------------------
100
101static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
102        jint flags) {
103    return renderer->save(flags);
104}
105
106static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
107        OpenGLRenderer* renderer) {
108    return renderer->getSaveCount();
109}
110
111static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
112        OpenGLRenderer* renderer) {
113    renderer->restore();
114}
115
116static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
117        OpenGLRenderer* renderer, jint saveCount) {
118    renderer->restoreToCount(saveCount);
119}
120
121// ----------------------------------------------------------------------------
122// Layers
123// ----------------------------------------------------------------------------
124
125static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
126        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
127        SkPaint* paint, jint saveFlags) {
128    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
129}
130
131static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
132        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
133        jint alpha, jint saveFlags) {
134    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
135}
136
137// ----------------------------------------------------------------------------
138// Clipping
139// ----------------------------------------------------------------------------
140
141static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
142        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
143        SkCanvas::EdgeType edge) {
144    return renderer->quickReject(left, top, right, bottom);
145}
146
147static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
148        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
149        SkRegion::Op op) {
150    return renderer->clipRect(left, top, right, bottom, op);
151}
152
153static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
154        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
155        SkRegion::Op op) {
156    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
157}
158
159static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
160        OpenGLRenderer* renderer, jobject rect) {
161    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
162
163    env->CallVoidMethod(rect, gRectClassInfo.set,
164            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
165
166    return !bounds.isEmpty();
167}
168
169// ----------------------------------------------------------------------------
170// Transforms
171// ----------------------------------------------------------------------------
172
173static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
174        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
175    renderer->translate(dx, dy);
176}
177
178static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
179        OpenGLRenderer* renderer, jfloat degrees) {
180    renderer->rotate(degrees);
181}
182
183static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
184        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
185    renderer->scale(sx, sy);
186}
187
188static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
189        OpenGLRenderer* renderer, SkMatrix* matrix) {
190    renderer->setMatrix(matrix);
191}
192
193static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
194        OpenGLRenderer* renderer, SkMatrix* matrix) {
195    renderer->getMatrix(matrix);
196}
197
198static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
199        OpenGLRenderer* renderer, SkMatrix* matrix) {
200    renderer->concatMatrix(matrix);
201}
202
203// ----------------------------------------------------------------------------
204// Drawing
205// ----------------------------------------------------------------------------
206
207static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
208        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
209    renderer->drawBitmap(bitmap, left, top, paint);
210}
211
212static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
213        OpenGLRenderer* renderer, SkBitmap* bitmap,
214        float srcLeft, float srcTop, float srcRight, float srcBottom,
215        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
216    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
217            dstLeft, dstTop, dstRight, dstBottom, paint);
218}
219
220static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
221        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
222    renderer->drawBitmap(bitmap, matrix, paint);
223}
224
225static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
226        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
227        float left, float top, float right, float bottom, SkPaint* paint) {
228    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
229    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
230    Res_png_9patch::deserialize(patch);
231
232    renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint);
233
234    env->ReleaseByteArrayElements(chunks, storage, 0);
235}
236
237static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
238        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
239    renderer->drawColor(color, mode);
240}
241
242static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
243        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
244        SkPaint* paint) {
245    renderer->drawRect(left, top, right, bottom, paint);
246}
247
248static void android_view_GLES20Canvas_drawRects(JNIEnv* env, jobject canvas,
249        OpenGLRenderer* renderer, SkRegion* region, SkPaint* paint) {
250    SkRegion::Iterator it(*region);
251    while (!it.done()) {
252        const SkIRect& r = it.rect();
253        renderer->drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
254        it.next();
255    }
256}
257
258static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject canvas,
259        OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) {
260    renderer->drawPath(path, paint);
261}
262
263// ----------------------------------------------------------------------------
264// Shaders and color filters
265// ----------------------------------------------------------------------------
266
267static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject canvas,
268        OpenGLRenderer* renderer) {
269    renderer->resetShader();
270    renderer->resetColorFilter();
271    renderer->resetShadow();
272}
273
274static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas,
275        OpenGLRenderer* renderer, SkiaShader* shader) {
276    renderer->setupShader(shader);
277}
278
279static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject canvas,
280        OpenGLRenderer* renderer, SkiaColorFilter* filter) {
281    renderer->setupColorFilter(filter);
282}
283
284static void android_view_GLES20Canvas_setupShadow(JNIEnv* env, jobject canvas,
285        OpenGLRenderer* renderer, jfloat radius, jfloat dx, jfloat dy, jint color) {
286    renderer->setupShadow(radius, dx, dy, color);
287}
288
289// ----------------------------------------------------------------------------
290// Text
291// ----------------------------------------------------------------------------
292
293static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
294        jfloat x, jfloat y, int flags, SkPaint* paint) {
295    const jchar *workText;
296    jchar* buffer = NULL;
297    int32_t workBytes;
298    if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) {
299        renderer->drawText((const char*) workText, workBytes, count, x, y, paint);
300        free(buffer);
301    }
302}
303
304static void renderTextRun(OpenGLRenderer* renderer, const jchar* text,
305        jint start, jint count, jint contextCount, jfloat x, jfloat y,
306        int flags, SkPaint* paint) {
307    uint8_t rtl = flags & 0x1;
308    if (rtl) {
309        SkAutoSTMalloc<80, jchar> buffer(contextCount);
310        jchar* shaped = buffer.get();
311        if (TextLayout::prepareRtlTextRun(text, start, count, contextCount, shaped)) {
312            renderer->drawText((const char*) shaped, count << 1, count, x, y, paint);
313        } else {
314            LOGW("drawTextRun error");
315        }
316    } else {
317        renderer->drawText((const char*) (text + start), count << 1, count, x, y, paint);
318    }
319}
320
321static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas,
322        OpenGLRenderer* renderer, jcharArray text, int index, int count,
323        jfloat x, jfloat y, int flags, SkPaint* paint) {
324    jchar* textArray = env->GetCharArrayElements(text, NULL);
325    renderText(renderer, textArray + index, count, x, y, flags, paint);
326    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
327}
328
329static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas,
330        OpenGLRenderer* renderer, jstring text, int start, int end,
331        jfloat x, jfloat y, int flags, SkPaint* paint) {
332    const jchar* textArray = env->GetStringChars(text, NULL);
333    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
334    env->ReleaseStringChars(text, textArray);
335}
336
337static void android_view_GLES20Canvas_drawTextRunArray(JNIEnv* env, jobject canvas,
338        OpenGLRenderer* renderer, jcharArray text, int index, int count,
339        int contextIndex, int contextCount, jfloat x, jfloat y, int dirFlags,
340        SkPaint* paint) {
341    jchar* textArray = env->GetCharArrayElements(text, NULL);
342    renderTextRun(renderer, textArray + contextIndex, index - contextIndex,
343            count, contextCount, x, y, dirFlags, paint);
344    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
345 }
346
347static void android_view_GLES20Canvas_drawTextRun(JNIEnv* env, jobject canvas,
348        OpenGLRenderer* renderer, jstring text, int start, int end,
349        int contextStart, int contextEnd, jfloat x, jfloat y, int dirFlags,
350        SkPaint* paint) {
351    const jchar* textArray = env->GetStringChars(text, NULL);
352    jint count = end - start;
353    jint contextCount = contextEnd - contextStart;
354    renderTextRun(renderer, textArray + contextStart, start - contextStart,
355            count, contextCount, x, y, dirFlags, paint);
356    env->ReleaseStringChars(text, textArray);
357}
358
359#endif // USE_OPENGL_RENDERER
360
361// ----------------------------------------------------------------------------
362// Common
363// ----------------------------------------------------------------------------
364
365static jboolean android_view_GLES20Canvas_isAvailable(JNIEnv* env, jobject clazz) {
366#ifdef USE_OPENGL_RENDERER
367    return JNI_TRUE;
368#else
369    return JNI_FALSE;
370#endif
371}
372
373// ----------------------------------------------------------------------------
374// JNI Glue
375// ----------------------------------------------------------------------------
376
377const char* const kClassPathName = "android/view/GLES20Canvas";
378
379static JNINativeMethod gMethods[] = {
380    { "nIsAvailable",       "()Z",             (void*) android_view_GLES20Canvas_isAvailable },
381
382#ifdef USE_OPENGL_RENDERER
383    { "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
384    { "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
385    { "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
386    { "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
387    { "nAcquireContext",    "(I)V",            (void*) android_view_GLES20Canvas_acquireContext },
388    { "nReleaseContext",    "(I)V",            (void*) android_view_GLES20Canvas_releaseContext },
389
390    { "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
391    { "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
392    { "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
393    { "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
394
395    { "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
396    { "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
397
398    { "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
399    { "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
400    { "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
401
402    { "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
403    { "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
404    { "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
405
406    { "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
407    { "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
408    { "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
409
410    { "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
411    { "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
412    { "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
413    { "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
414    { "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
415    { "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
416    { "nDrawRects",         "(III)V",          (void*) android_view_GLES20Canvas_drawRects },
417    { "nDrawPath",          "(III)V",          (void*) android_view_GLES20Canvas_drawPath },
418
419    { "nResetModifiers",    "(I)V",            (void*) android_view_GLES20Canvas_resetModifiers },
420    { "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
421    { "nSetupColorFilter",  "(II)V",           (void*) android_view_GLES20Canvas_setupColorFilter },
422    { "nSetupShadow",       "(IFFFI)V",        (void*) android_view_GLES20Canvas_setupShadow },
423
424    { "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
425    { "nDrawText",          "(ILjava/lang/String;IIFFII)V",
426            (void*) android_view_GLES20Canvas_drawText },
427
428    { "nDrawTextRun",       "(I[CIIIIFFII)V",  (void*) android_view_GLES20Canvas_drawTextRunArray },
429    { "nDrawTextRun",       "(ILjava/lang/String;IIIIFFII)V",
430            (void*) android_view_GLES20Canvas_drawTextRun },
431
432    { "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
433            (void*) android_view_GLES20Canvas_getClipBounds },
434#endif
435};
436
437#ifdef USE_OPENGL_RENDERER
438    #define FIND_CLASS(var, className) \
439            var = env->FindClass(className); \
440            LOG_FATAL_IF(! var, "Unable to find class " className); \
441            var = jclass(env->NewGlobalRef(var));
442
443    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
444            var = env->GetMethodID(clazz, methodName, methodDescriptor); \
445            LOG_FATAL_IF(! var, "Unable to find method " methodName);
446#else
447    #define FIND_CLASS(var, className)
448    #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor)
449#endif
450
451int register_android_view_GLES20Canvas(JNIEnv* env) {
452    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
453    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
454
455    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
456}
457
458};
459