android_view_GLES20Canvas.cpp revision c0ac193b9415680f0a69e20a3f5f22d16f8053be 
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 <SkRegion.h>
27#include <SkXfermode.h>
28
29#include <OpenGLRenderer.h>
30#include <Rect.h>
31#include <ui/Rect.h>
32
33namespace android {
34
35using namespace uirenderer;
36
37// ----------------------------------------------------------------------------
38// Java APIs
39// ----------------------------------------------------------------------------
40
41static struct {
42    jclass clazz;
43    jmethodID set;
44} gRectClassInfo;
45
46// ----------------------------------------------------------------------------
47// Constructors
48// ----------------------------------------------------------------------------
49
50static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
51    return new OpenGLRenderer;
52}
53
54static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
55        OpenGLRenderer* renderer) {
56    delete renderer;
57}
58
59// ----------------------------------------------------------------------------
60// Setup
61// ----------------------------------------------------------------------------
62
63static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
64        OpenGLRenderer* renderer, jint width, jint height) {
65    renderer->setViewport(width, height);
66}
67
68static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
69        OpenGLRenderer* renderer) {
70    renderer->prepare();
71}
72
73// ----------------------------------------------------------------------------
74// State
75// ----------------------------------------------------------------------------
76
77static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
78        jint flags) {
79    return renderer->save(flags);
80}
81
82static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
83        OpenGLRenderer* renderer) {
84    return renderer->getSaveCount();
85}
86
87static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
88        OpenGLRenderer* renderer) {
89    renderer->restore();
90}
91
92static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
93        OpenGLRenderer* renderer, jint saveCount) {
94    renderer->restoreToCount(saveCount);
95}
96
97// ----------------------------------------------------------------------------
98// Layers
99// ----------------------------------------------------------------------------
100
101static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
102        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
103        SkPaint* paint, jint saveFlags) {
104    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
105}
106
107static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
108        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
109        jint alpha, jint saveFlags) {
110    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
111}
112
113// ----------------------------------------------------------------------------
114// Clipping
115// ----------------------------------------------------------------------------
116
117static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
118        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
119        SkCanvas::EdgeType edge) {
120    return renderer->quickReject(left, top, right, bottom);
121}
122
123static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
124        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
125        SkRegion::Op op) {
126    return renderer->clipRect(left, top, right, bottom, op);
127}
128
129static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
130        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
131        SkRegion::Op op) {
132    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
133}
134
135static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
136        OpenGLRenderer* renderer, jobject rect) {
137    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
138
139    env->CallVoidMethod(rect, gRectClassInfo.set,
140            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
141
142    return !bounds.isEmpty();
143}
144
145// ----------------------------------------------------------------------------
146// Transforms
147// ----------------------------------------------------------------------------
148
149static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
150        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
151    renderer->translate(dx, dy);
152}
153
154static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
155        OpenGLRenderer* renderer, jfloat degrees) {
156    renderer->rotate(degrees);
157}
158
159static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
160        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
161    renderer->scale(sx, sy);
162}
163
164static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
165        OpenGLRenderer* renderer, SkMatrix* matrix) {
166    renderer->setMatrix(matrix);
167}
168
169static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
170        OpenGLRenderer* renderer, SkMatrix* matrix) {
171    renderer->getMatrix(matrix);
172}
173
174static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
175        OpenGLRenderer* renderer, SkMatrix* matrix) {
176    renderer->concatMatrix(matrix);
177}
178
179// ----------------------------------------------------------------------------
180// Drawing
181// ----------------------------------------------------------------------------
182
183static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
184        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
185    renderer->drawBitmap(bitmap, left, top, paint);
186}
187
188static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
189        OpenGLRenderer* renderer, SkBitmap* bitmap,
190        float srcLeft, float srcTop, float srcRight, float srcBottom,
191        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
192    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
193            dstLeft, dstTop, dstRight, dstBottom, paint);
194}
195
196static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
197        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
198    renderer->drawBitmap(bitmap, matrix, paint);
199}
200
201static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
202        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
203        float left, float top, float right, float bottom, SkPaint* paint) {
204    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
205    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
206    Res_png_9patch::deserialize(patch);
207
208    renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint);
209
210    // TODO: make sure that 0 is correct for the flags
211    env->ReleaseByteArrayElements(chunks, storage, 0);
212}
213
214static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
215        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
216    renderer->drawColor(color, mode);
217}
218
219static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
220        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
221        SkPaint* paint) {
222    renderer->drawRect(left, top, right, bottom, paint);
223}
224
225// ----------------------------------------------------------------------------
226// Shaders
227// ----------------------------------------------------------------------------
228
229static void android_view_GLES20Canvas_resetShader(JNIEnv* env, jobject canvas,
230        OpenGLRenderer* renderer) {
231    renderer->resetShader();
232}
233
234static void android_view_GLES20Canvas_setupBitmapShader(JNIEnv* env, jobject canvas,
235        OpenGLRenderer* renderer, SkShader* shader, SkBitmap* bitmap,
236        SkShader::TileMode tileX, SkShader::TileMode tileY, SkMatrix* matrix) {
237    renderer->setupBitmapShader(bitmap, tileX, tileY, matrix,
238            (shader->getFlags() & SkShader::kOpaqueAlpha_Flag) == 0);
239}
240
241static void android_view_GLES20Canvas_setupLinearShader(JNIEnv* env, jobject canvas,
242        OpenGLRenderer* renderer, SkShader* shader, float* bounds, uint32_t* colors,
243        float* positions, int count, SkShader::TileMode tileMode, SkMatrix* matrix) {
244    renderer->setupLinearGradientShader(shader, bounds, colors, positions, count,
245            tileMode, matrix, (shader->getFlags() & SkShader::kOpaqueAlpha_Flag) == 0);
246}
247
248// ----------------------------------------------------------------------------
249// JNI Glue
250// ----------------------------------------------------------------------------
251
252const char* const kClassPathName = "android/view/GLES20Canvas";
253
254static JNINativeMethod gMethods[] = {
255    {   "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
256    {   "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
257    {   "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
258    {   "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
259
260    {   "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
261    {   "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
262    {   "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
263    {   "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
264
265    {   "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
266    {   "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
267
268    {   "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
269    {   "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
270    {   "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
271
272    {   "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
273    {   "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
274    {   "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
275
276    {   "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
277    {   "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
278    {   "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
279
280    {   "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
281    {   "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
282    {   "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
283    {   "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
284    {   "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
285    {   "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
286
287    {   "nResetShader",       "(I)V",            (void*) android_view_GLES20Canvas_resetShader },
288    {   "nSetupBitmapShader", "(IIIIII)V",       (void*) android_view_GLES20Canvas_setupBitmapShader },
289    {   "nSetupLinearShader", "(IIIIIIII)V",     (void*) android_view_GLES20Canvas_setupLinearShader },
290
291    {   "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
292            (void*) android_view_GLES20Canvas_getClipBounds },
293};
294
295#define FIND_CLASS(var, className) \
296        var = env->FindClass(className); \
297        LOG_FATAL_IF(! var, "Unable to find class " className); \
298        var = jclass(env->NewGlobalRef(var));
299
300#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
301        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
302        LOG_FATAL_IF(! var, "Unable to find method " methodName);
303
304int register_android_view_GLES20Canvas(JNIEnv* env) {
305    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
306    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
307
308    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
309}
310
311};
312