android_view_GLES20Canvas.cpp revision 06f96e2652e4855b6520ad9dd70583677605b79a 
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 <Rect.h>
35#include <ui/Rect.h>
36
37#include "TextLayout.h"
38
39namespace android {
40
41using namespace uirenderer;
42
43// ----------------------------------------------------------------------------
44// Java APIs
45// ----------------------------------------------------------------------------
46
47static struct {
48    jclass clazz;
49    jmethodID set;
50} gRectClassInfo;
51
52// ----------------------------------------------------------------------------
53// Constructors
54// ----------------------------------------------------------------------------
55
56static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
57    return new OpenGLRenderer;
58}
59
60static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
61        OpenGLRenderer* renderer) {
62    delete renderer;
63}
64
65// ----------------------------------------------------------------------------
66// Setup
67// ----------------------------------------------------------------------------
68
69static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
70        OpenGLRenderer* renderer, jint width, jint height) {
71    renderer->setViewport(width, height);
72}
73
74static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
75        OpenGLRenderer* renderer) {
76    renderer->prepare();
77}
78
79// ----------------------------------------------------------------------------
80// State
81// ----------------------------------------------------------------------------
82
83static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
84        jint flags) {
85    return renderer->save(flags);
86}
87
88static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
89        OpenGLRenderer* renderer) {
90    return renderer->getSaveCount();
91}
92
93static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
94        OpenGLRenderer* renderer) {
95    renderer->restore();
96}
97
98static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
99        OpenGLRenderer* renderer, jint saveCount) {
100    renderer->restoreToCount(saveCount);
101}
102
103// ----------------------------------------------------------------------------
104// Layers
105// ----------------------------------------------------------------------------
106
107static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
108        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
109        SkPaint* paint, jint saveFlags) {
110    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
111}
112
113static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
114        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
115        jint alpha, jint saveFlags) {
116    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
117}
118
119// ----------------------------------------------------------------------------
120// Clipping
121// ----------------------------------------------------------------------------
122
123static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
124        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
125        SkCanvas::EdgeType edge) {
126    return renderer->quickReject(left, top, right, bottom);
127}
128
129static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
130        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
131        SkRegion::Op op) {
132    return renderer->clipRect(left, top, right, bottom, op);
133}
134
135static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
136        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
137        SkRegion::Op op) {
138    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
139}
140
141static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
142        OpenGLRenderer* renderer, jobject rect) {
143    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
144
145    env->CallVoidMethod(rect, gRectClassInfo.set,
146            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
147
148    return !bounds.isEmpty();
149}
150
151// ----------------------------------------------------------------------------
152// Transforms
153// ----------------------------------------------------------------------------
154
155static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
156        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
157    renderer->translate(dx, dy);
158}
159
160static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
161        OpenGLRenderer* renderer, jfloat degrees) {
162    renderer->rotate(degrees);
163}
164
165static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
166        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
167    renderer->scale(sx, sy);
168}
169
170static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
171        OpenGLRenderer* renderer, SkMatrix* matrix) {
172    renderer->setMatrix(matrix);
173}
174
175static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
176        OpenGLRenderer* renderer, SkMatrix* matrix) {
177    renderer->getMatrix(matrix);
178}
179
180static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
181        OpenGLRenderer* renderer, SkMatrix* matrix) {
182    renderer->concatMatrix(matrix);
183}
184
185// ----------------------------------------------------------------------------
186// Drawing
187// ----------------------------------------------------------------------------
188
189static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
190        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
191    renderer->drawBitmap(bitmap, left, top, paint);
192}
193
194static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
195        OpenGLRenderer* renderer, SkBitmap* bitmap,
196        float srcLeft, float srcTop, float srcRight, float srcBottom,
197        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
198    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
199            dstLeft, dstTop, dstRight, dstBottom, paint);
200}
201
202static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
203        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
204    renderer->drawBitmap(bitmap, matrix, paint);
205}
206
207static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
208        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
209        float left, float top, float right, float bottom, SkPaint* paint) {
210    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
211    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
212    Res_png_9patch::deserialize(patch);
213
214    renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint);
215
216    env->ReleaseByteArrayElements(chunks, storage, 0);
217}
218
219static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
220        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
221    renderer->drawColor(color, mode);
222}
223
224static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
225        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
226        SkPaint* paint) {
227    renderer->drawRect(left, top, right, bottom, paint);
228}
229
230// ----------------------------------------------------------------------------
231// Shaders
232// ----------------------------------------------------------------------------
233
234static void android_view_GLES20Canvas_resetShader(JNIEnv* env, jobject canvas,
235        OpenGLRenderer* renderer) {
236    renderer->resetShader();
237}
238
239static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas,
240        OpenGLRenderer* renderer, SkiaShader* shader) {
241    renderer->setupShader(shader);
242}
243
244// ----------------------------------------------------------------------------
245// Text
246// ----------------------------------------------------------------------------
247
248static void renderText(OpenGLRenderer* renderer, const jchar* text, int count,
249        jfloat x, jfloat y, int flags, SkPaint* paint) {
250    const jchar *workText;
251    jchar* buffer = NULL;
252    int32_t workBytes;
253    if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) {
254        renderer->drawText((const char*) workText, workBytes, count, x, y, paint);
255        free(buffer);
256    }
257}
258
259static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas,
260        OpenGLRenderer* renderer, jcharArray text, int index, int count,
261        jfloat x, jfloat y, int flags, SkPaint* paint) {
262    jchar* textArray = env->GetCharArrayElements(text, NULL);
263    renderText(renderer, textArray + index, count, x, y, flags, paint);
264    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
265}
266
267static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas,
268        OpenGLRenderer* renderer, jstring text, int start, int end,
269        jfloat x, jfloat y, int flags, SkPaint* paint) {
270    const jchar* textArray = env->GetStringChars(text, NULL);
271    renderText(renderer, textArray + start, end - start, x, y, flags, paint);
272    env->ReleaseStringChars(text, textArray);
273}
274
275// ----------------------------------------------------------------------------
276// JNI Glue
277// ----------------------------------------------------------------------------
278
279const char* const kClassPathName = "android/view/GLES20Canvas";
280
281static JNINativeMethod gMethods[] = {
282    {   "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
283    {   "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
284    {   "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
285    {   "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
286
287    {   "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
288    {   "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
289    {   "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
290    {   "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
291
292    {   "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
293    {   "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
294
295    {   "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
296    {   "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
297    {   "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
298
299    {   "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
300    {   "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
301    {   "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
302
303    {   "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
304    {   "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
305    {   "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
306
307    {   "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
308    {   "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
309    {   "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
310    {   "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
311    {   "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
312    {   "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
313
314    {   "nResetShader",       "(I)V",            (void*) android_view_GLES20Canvas_resetShader },
315    {   "nSetupShader",       "(II)V",           (void*) android_view_GLES20Canvas_setupShader },
316
317    {   "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
318    {   "nDrawText",          "(ILjava/lang/String;IIFFII)V",
319            (void*) android_view_GLES20Canvas_drawText },
320
321    {   "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
322            (void*) android_view_GLES20Canvas_getClipBounds },
323};
324
325#define FIND_CLASS(var, className) \
326        var = env->FindClass(className); \
327        LOG_FATAL_IF(! var, "Unable to find class " className); \
328        var = jclass(env->NewGlobalRef(var));
329
330#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
331        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
332        LOG_FATAL_IF(! var, "Unable to find method " methodName);
333
334int register_android_view_GLES20Canvas(JNIEnv* env) {
335    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
336    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
337
338    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
339}
340
341};
342