android_view_GLES20Canvas.cpp revision 7fbcc0492fca03857e3c45064f4aa040af817d55 
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 <SkXfermode.h>
31
32#include <OpenGLRenderer.h>
33#include <SkiaShader.h>
34#include <SkiaColorFilter.h>
35#include <Rect.h>
36#include <ui/Rect.h>
37
38#include "TextLayout.h"
39
40namespace android {
41
42using namespace uirenderer;
43
44// ----------------------------------------------------------------------------
45// Java APIs
46// ----------------------------------------------------------------------------
47
48static struct {
49    jclass clazz;
50    jmethodID set;
51} gRectClassInfo;
52
53// ----------------------------------------------------------------------------
54// Constructors
55// ----------------------------------------------------------------------------
56
57static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
58    return new OpenGLRenderer;
59}
60
61static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
62        OpenGLRenderer* renderer) {
63    delete renderer;
64}
65
66// ----------------------------------------------------------------------------
67// Setup
68// ----------------------------------------------------------------------------
69
70static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
71        OpenGLRenderer* renderer, jint width, jint height) {
72    renderer->setViewport(width, height);
73}
74
75static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
76        OpenGLRenderer* renderer) {
77    renderer->prepare();
78}
79
80// ----------------------------------------------------------------------------
81// State
82// ----------------------------------------------------------------------------
83
84static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
85        jint flags) {
86    return renderer->save(flags);
87}
88
89static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
90        OpenGLRenderer* renderer) {
91    return renderer->getSaveCount();
92}
93
94static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
95        OpenGLRenderer* renderer) {
96    renderer->restore();
97}
98
99static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
100        OpenGLRenderer* renderer, jint saveCount) {
101    renderer->restoreToCount(saveCount);
102}
103
104// ----------------------------------------------------------------------------
105// Layers
106// ----------------------------------------------------------------------------
107
108static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
109        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
110        SkPaint* paint, jint saveFlags) {
111    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
112}
113
114static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
115        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
116        jint alpha, jint saveFlags) {
117    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
118}
119
120// ----------------------------------------------------------------------------
121// Clipping
122// ----------------------------------------------------------------------------
123
124static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
125        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
126        SkCanvas::EdgeType edge) {
127    return renderer->quickReject(left, top, right, bottom);
128}
129
130static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
131        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
132        SkRegion::Op op) {
133    return renderer->clipRect(left, top, right, bottom, op);
134}
135
136static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
137        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
138        SkRegion::Op op) {
139    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
140}
141
142static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
143        OpenGLRenderer* renderer, jobject rect) {
144    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
145
146    env->CallVoidMethod(rect, gRectClassInfo.set,
147            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
148
149    return !bounds.isEmpty();
150}
151
152// ----------------------------------------------------------------------------
153// Transforms
154// ----------------------------------------------------------------------------
155
156static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
157        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
158    renderer->translate(dx, dy);
159}
160
161static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
162        OpenGLRenderer* renderer, jfloat degrees) {
163    renderer->rotate(degrees);
164}
165
166static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
167        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
168    renderer->scale(sx, sy);
169}
170
171static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
172        OpenGLRenderer* renderer, SkMatrix* matrix) {
173    renderer->setMatrix(matrix);
174}
175
176static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
177        OpenGLRenderer* renderer, SkMatrix* matrix) {
178    renderer->getMatrix(matrix);
179}
180
181static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
182        OpenGLRenderer* renderer, SkMatrix* matrix) {
183    renderer->concatMatrix(matrix);
184}
185
186// ----------------------------------------------------------------------------
187// Drawing
188// ----------------------------------------------------------------------------
189
190static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
191        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
192    renderer->drawBitmap(bitmap, left, top, paint);
193}
194
195static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
196        OpenGLRenderer* renderer, SkBitmap* bitmap,
197        float srcLeft, float srcTop, float srcRight, float srcBottom,
198        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
199    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
200            dstLeft, dstTop, dstRight, dstBottom, paint);
201}
202
203static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
204        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
205    renderer->drawBitmap(bitmap, matrix, paint);
206}
207
208static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
209        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
210        float left, float top, float right, float bottom, SkPaint* paint) {
211    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
212    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
213    Res_png_9patch::deserialize(patch);
214
215    renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint);
216
217    env->ReleaseByteArrayElements(chunks, storage, 0);
218}
219
220static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
221        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
222    renderer->drawColor(color, mode);
223}
224
225static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
226        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
227        SkPaint* paint) {
228    renderer->drawRect(left, top, right, bottom, paint);
229}
230
231static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject canvas,
232        OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) {
233    renderer->drawPath(path, paint);
234}
235
236// ----------------------------------------------------------------------------
237// Shaders and color filters
238// ----------------------------------------------------------------------------
239
240static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject canvas,
241        OpenGLRenderer* renderer) {
242    renderer->resetShader();
243    renderer->resetColorFilter();
244}
245
246static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas,
247        OpenGLRenderer* renderer, SkiaShader* shader) {
248    renderer->setupShader(shader);
249}
250
251static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject canvas,
252        OpenGLRenderer* renderer, SkiaColorFilter* filter) {
253    renderer->setupColorFilter(filter);
254}
255
256// ----------------------------------------------------------------------------
257// Text
258// ----------------------------------------------------------------------------
259
260static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
261        jfloat x, jfloat y, int flags, SkPaint* paint) {
262    const jchar *workText;
263    jchar* buffer = NULL;
264    int32_t workBytes;
265    if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) {
266        renderer->drawText((const char*) workText, workBytes, count, x, y, paint);
267        free(buffer);
268    }
269}
270
271static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas,
272        OpenGLRenderer* renderer, jcharArray text, int index, int count,
273        jfloat x, jfloat y, int flags, SkPaint* paint) {
274    jchar* textArray = env->GetCharArrayElements(text, NULL);
275    renderText(renderer, textArray + index, count, x, y, flags, paint);
276    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
277}
278
279static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas,
280        OpenGLRenderer* renderer, jstring text, int start, int end,
281        jfloat x, jfloat y, int flags, SkPaint* paint) {
282    const jchar* textArray = env->GetStringChars(text, NULL);
283    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
284    env->ReleaseStringChars(text, textArray);
285}
286
287// ----------------------------------------------------------------------------
288// JNI Glue
289// ----------------------------------------------------------------------------
290
291const char* const kClassPathName = "android/view/GLES20Canvas";
292
293static JNINativeMethod gMethods[] = {
294    {   "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
295    {   "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
296    {   "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
297    {   "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
298
299    {   "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
300    {   "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
301    {   "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
302    {   "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
303
304    {   "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
305    {   "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
306
307    {   "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
308    {   "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
309    {   "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
310
311    {   "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
312    {   "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
313    {   "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
314
315    {   "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
316    {   "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
317    {   "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
318
319    {   "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
320    {   "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
321    {   "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
322    {   "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
323    {   "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
324    {   "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
325    {   "nDrawPath",          "(III)V",          (void*) android_view_GLES20Canvas_drawPath },
326
327    {   "nResetModifiers",    "(I)V",            (void*) android_view_GLES20Canvas_resetModifiers },
328    {   "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
329    {   "nSetupColorFilter",  "(II)V",           (void*) android_view_GLES20Canvas_setupColorFilter },
330
331    {   "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
332    {   "nDrawText",          "(ILjava/lang/String;IIFFII)V",
333            (void*) android_view_GLES20Canvas_drawText },
334
335    {   "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
336            (void*) android_view_GLES20Canvas_getClipBounds },
337};
338
339#define FIND_CLASS(var, className) \
340        var = env->FindClass(className); \
341        LOG_FATAL_IF(! var, "Unable to find class " className); \
342        var = jclass(env->NewGlobalRef(var));
343
344#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
345        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
346        LOG_FATAL_IF(! var, "Unable to find method " methodName);
347
348int register_android_view_GLES20Canvas(JNIEnv* env) {
349    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
350    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
351
352    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
353}
354
355};
356