android_view_GLES20Canvas.cpp revision dbd77cd444f89d94ec5333223c1bc17dbe0c90cd 
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#include "jni.h"
18#include <nativehelper/JNIHelp.h>
19#include <android_runtime/AndroidRuntime.h>
20#include <utils/ResourceTypes.h>
21
22#include <SkBitmap.h>
23#include <SkCanvas.h>
24#include <SkMatrix.h>
25#include <SkPaint.h>
26#include <SkXfermode.h>
27
28#include <OpenGLRenderer.h>
29#include <Rect.h>
30#include <ui/Rect.h>
31
32namespace android {
33
34using namespace uirenderer;
35
36// ----------------------------------------------------------------------------
37// Java APIs
38// ----------------------------------------------------------------------------
39
40static struct {
41    jclass clazz;
42    jmethodID set;
43} gRectClassInfo;
44
45// ----------------------------------------------------------------------------
46// Constructors
47// ----------------------------------------------------------------------------
48
49static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
50    return new OpenGLRenderer;
51}
52
53static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
54        OpenGLRenderer* renderer) {
55    delete renderer;
56}
57
58// ----------------------------------------------------------------------------
59// Setup
60// ----------------------------------------------------------------------------
61
62static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
63        OpenGLRenderer* renderer, jint width, jint height) {
64    renderer->setViewport(width, height);
65}
66
67static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
68        OpenGLRenderer* renderer) {
69    renderer->prepare();
70}
71
72// ----------------------------------------------------------------------------
73// State
74// ----------------------------------------------------------------------------
75
76static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
77        jint flags) {
78    return renderer->save(flags);
79}
80
81static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
82        OpenGLRenderer* renderer) {
83    return renderer->getSaveCount();
84}
85
86static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
87        OpenGLRenderer* renderer) {
88    renderer->restore();
89}
90
91static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
92        OpenGLRenderer* renderer, jint saveCount) {
93    renderer->restoreToCount(saveCount);
94}
95
96// ----------------------------------------------------------------------------
97// Layers
98// ----------------------------------------------------------------------------
99
100static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
101        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
102        SkPaint* paint, jint saveFlags) {
103    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
104}
105
106static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
107        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
108        jint alpha, jint saveFlags) {
109    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
110}
111
112// ----------------------------------------------------------------------------
113// Clipping
114// ----------------------------------------------------------------------------
115
116static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
117        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
118        SkCanvas::EdgeType edge) {
119    return renderer->quickReject(left, top, right, bottom);
120}
121
122static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
123        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom) {
124    return renderer->clipRect(left, top, right, bottom);
125}
126
127static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
128        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom) {
129    return renderer->clipRect(float(left), float(top), float(right), float(bottom));
130}
131
132static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
133        OpenGLRenderer* renderer, jobject rect) {
134    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
135
136    env->CallVoidMethod(rect, gRectClassInfo.set,
137            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
138
139    return !bounds.isEmpty();
140}
141
142// ----------------------------------------------------------------------------
143// Transforms
144// ----------------------------------------------------------------------------
145
146static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
147        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
148    renderer->translate(dx, dy);
149}
150
151static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
152        OpenGLRenderer* renderer, jfloat degrees) {
153    renderer->rotate(degrees);
154}
155
156static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
157        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
158    renderer->scale(sx, sy);
159}
160
161static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
162        OpenGLRenderer* renderer, SkMatrix* matrix) {
163    renderer->setMatrix(matrix);
164}
165
166static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
167        OpenGLRenderer* renderer, SkMatrix* matrix) {
168    renderer->getMatrix(matrix);
169}
170
171static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
172        OpenGLRenderer* renderer, SkMatrix* matrix) {
173    renderer->concatMatrix(matrix);
174}
175
176// ----------------------------------------------------------------------------
177// Drawing
178// ----------------------------------------------------------------------------
179
180static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
181        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
182    renderer->drawBitmap(bitmap, left, top, paint);
183}
184
185static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
186        OpenGLRenderer* renderer, SkBitmap* bitmap,
187        float srcLeft, float srcTop, float srcRight, float srcBottom,
188        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
189    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
190            dstLeft, dstTop, dstRight, dstBottom, paint);
191}
192
193static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
194        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
195    renderer->drawBitmap(bitmap, matrix, paint);
196}
197
198static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
199        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
200        float left, float top, float right, float bottom, SkPaint* paint) {
201
202    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
203    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
204    Res_png_9patch::deserialize(patch);
205
206    renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint);
207
208    // TODO: make sure that 0 is correct for the flags
209    env->ReleaseByteArrayElements(chunks, storage, 0);
210}
211
212static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
213        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
214    renderer->drawColor(color, mode);
215}
216
217static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
218        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
219        SkPaint* paint) {
220    renderer->drawRect(left, top, right, bottom, paint);
221}
222
223// ----------------------------------------------------------------------------
224// JNI Glue
225// ----------------------------------------------------------------------------
226
227const char* const kClassPathName = "android/view/GLES20Canvas";
228
229static JNINativeMethod gMethods[] = {
230    {   "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
231    {   "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
232    {   "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
233    {   "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
234
235    {   "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
236    {   "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
237    {   "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
238    {   "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
239
240    {   "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
241    {   "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
242
243    {   "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
244    {   "nClipRect",          "(IFFFF)Z",        (void*) android_view_GLES20Canvas_clipRectF },
245    {   "nClipRect",          "(IIIII)Z",        (void*) android_view_GLES20Canvas_clipRect },
246
247    {   "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
248    {   "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
249    {   "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
250
251    {   "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
252    {   "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
253    {   "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
254
255    {   "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
256    {   "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
257    {   "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
258    {   "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
259    {   "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
260    {   "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
261
262    {   "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
263            (void*) android_view_GLES20Canvas_getClipBounds },
264};
265
266#define FIND_CLASS(var, className) \
267        var = env->FindClass(className); \
268        LOG_FATAL_IF(! var, "Unable to find class " className); \
269        var = jclass(env->NewGlobalRef(var));
270
271#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
272        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
273        LOG_FATAL_IF(! var, "Unable to find method " methodName);
274
275int register_android_view_GLES20Canvas(JNIEnv* env) {
276    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
277    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
278
279    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
280}
281
282};
283