android_view_GLES20Canvas.cpp revision 694b519ac647fe998fd396fe0784cc8e179aadc4 
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 <Rect.h>
34#include <ui/Rect.h>
35
36namespace android {
37
38using namespace uirenderer;
39
40// ----------------------------------------------------------------------------
41// Java APIs
42// ----------------------------------------------------------------------------
43
44static struct {
45    jclass clazz;
46    jmethodID set;
47} gRectClassInfo;
48
49// ----------------------------------------------------------------------------
50// Constructors
51// ----------------------------------------------------------------------------
52
53static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) {
54    return new OpenGLRenderer;
55}
56
57static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas,
58        OpenGLRenderer* renderer) {
59    delete renderer;
60}
61
62// ----------------------------------------------------------------------------
63// Setup
64// ----------------------------------------------------------------------------
65
66static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas,
67        OpenGLRenderer* renderer, jint width, jint height) {
68    renderer->setViewport(width, height);
69}
70
71static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas,
72        OpenGLRenderer* renderer) {
73    renderer->prepare();
74}
75
76// ----------------------------------------------------------------------------
77// State
78// ----------------------------------------------------------------------------
79
80static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer,
81        jint flags) {
82    return renderer->save(flags);
83}
84
85static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas,
86        OpenGLRenderer* renderer) {
87    return renderer->getSaveCount();
88}
89
90static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas,
91        OpenGLRenderer* renderer) {
92    renderer->restore();
93}
94
95static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas,
96        OpenGLRenderer* renderer, jint saveCount) {
97    renderer->restoreToCount(saveCount);
98}
99
100// ----------------------------------------------------------------------------
101// Layers
102// ----------------------------------------------------------------------------
103
104static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas,
105        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
106        SkPaint* paint, jint saveFlags) {
107    return renderer->saveLayer(left, top, right, bottom, paint, saveFlags);
108}
109
110static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas,
111        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
112        jint alpha, jint saveFlags) {
113    return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags);
114}
115
116// ----------------------------------------------------------------------------
117// Clipping
118// ----------------------------------------------------------------------------
119
120static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas,
121        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
122        SkCanvas::EdgeType edge) {
123    return renderer->quickReject(left, top, right, bottom);
124}
125
126static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas,
127        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
128        SkRegion::Op op) {
129    return renderer->clipRect(left, top, right, bottom, op);
130}
131
132static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas,
133        OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom,
134        SkRegion::Op op) {
135    return renderer->clipRect(float(left), float(top), float(right), float(bottom), op);
136}
137
138static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas,
139        OpenGLRenderer* renderer, jobject rect) {
140    const android::uirenderer::Rect& bounds(renderer->getClipBounds());
141
142    env->CallVoidMethod(rect, gRectClassInfo.set,
143            int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom));
144
145    return !bounds.isEmpty();
146}
147
148// ----------------------------------------------------------------------------
149// Transforms
150// ----------------------------------------------------------------------------
151
152static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas,
153        OpenGLRenderer* renderer, jfloat dx, jfloat dy) {
154    renderer->translate(dx, dy);
155}
156
157static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas,
158        OpenGLRenderer* renderer, jfloat degrees) {
159    renderer->rotate(degrees);
160}
161
162static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas,
163        OpenGLRenderer* renderer, jfloat sx, jfloat sy) {
164    renderer->scale(sx, sy);
165}
166
167static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas,
168        OpenGLRenderer* renderer, SkMatrix* matrix) {
169    renderer->setMatrix(matrix);
170}
171
172static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas,
173        OpenGLRenderer* renderer, SkMatrix* matrix) {
174    renderer->getMatrix(matrix);
175}
176
177static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas,
178        OpenGLRenderer* renderer, SkMatrix* matrix) {
179    renderer->concatMatrix(matrix);
180}
181
182// ----------------------------------------------------------------------------
183// Drawing
184// ----------------------------------------------------------------------------
185
186static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas,
187        OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) {
188    renderer->drawBitmap(bitmap, left, top, paint);
189}
190
191static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas,
192        OpenGLRenderer* renderer, SkBitmap* bitmap,
193        float srcLeft, float srcTop, float srcRight, float srcBottom,
194        float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) {
195    renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom,
196            dstLeft, dstTop, dstRight, dstBottom, paint);
197}
198
199static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas,
200        OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) {
201    renderer->drawBitmap(bitmap, matrix, paint);
202}
203
204static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas,
205        OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks,
206        float left, float top, float right, float bottom, SkPaint* paint) {
207    jbyte* storage = env->GetByteArrayElements(chunks, NULL);
208    Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage);
209    Res_png_9patch::deserialize(patch);
210
211    renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint);
212
213    env->ReleaseByteArrayElements(chunks, storage, 0);
214}
215
216static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas,
217        OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) {
218    renderer->drawColor(color, mode);
219}
220
221static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas,
222        OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom,
223        SkPaint* paint) {
224    renderer->drawRect(left, top, right, bottom, paint);
225}
226
227// ----------------------------------------------------------------------------
228// Shaders
229// ----------------------------------------------------------------------------
230
231static void android_view_GLES20Canvas_resetShader(JNIEnv* env, jobject canvas,
232        OpenGLRenderer* renderer) {
233    renderer->resetShader();
234}
235
236static void android_view_GLES20Canvas_setupBitmapShader(JNIEnv* env, jobject canvas,
237        OpenGLRenderer* renderer, SkShader* shader, SkBitmap* bitmap,
238        SkShader::TileMode tileX, SkShader::TileMode tileY, SkMatrix* matrix) {
239    renderer->setupBitmapShader(bitmap, tileX, tileY, matrix,
240            (shader->getFlags() & SkShader::kOpaqueAlpha_Flag) == 0);
241}
242
243static void android_view_GLES20Canvas_setupLinearShader(JNIEnv* env, jobject canvas,
244        OpenGLRenderer* renderer, SkShader* shader, float* bounds, uint32_t* colors,
245        float* positions, int count, SkShader::TileMode tileMode, SkMatrix* matrix) {
246    renderer->setupLinearGradientShader(shader, bounds, colors, positions, count,
247            tileMode, matrix, (shader->getFlags() & SkShader::kOpaqueAlpha_Flag) == 0);
248}
249
250// ----------------------------------------------------------------------------
251// Text
252// ----------------------------------------------------------------------------
253
254static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas,
255        OpenGLRenderer* renderer, jcharArray text, int index, int count,
256        jfloat x, jfloat y, int flags, SkPaint* paint) {
257    jchar* textArray = env->GetCharArrayElements(text, NULL);
258    // TODO: Prepare the text for RTL
259    renderer->drawText((const char*) (textArray + index), count, x, y, paint);
260    env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
261}
262
263static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas,
264        OpenGLRenderer* renderer, jstring text, int start, int end,
265        jfloat x, jfloat y, int flags, SkPaint* paint) {
266    const jchar* textArray = env->GetStringChars(text, NULL);
267    // TODO: Prepare the text for RTL
268    renderer->drawText((const char*) (textArray + start), end - start, x, y, paint);
269    env->ReleaseStringChars(text, textArray);
270}
271
272// ----------------------------------------------------------------------------
273// JNI Glue
274// ----------------------------------------------------------------------------
275
276const char* const kClassPathName = "android/view/GLES20Canvas";
277
278static JNINativeMethod gMethods[] = {
279    {   "nCreateRenderer",    "()I",             (void*) android_view_GLES20Canvas_createRenderer },
280    {   "nDestroyRenderer",   "(I)V",            (void*) android_view_GLES20Canvas_destroyRenderer },
281    {   "nSetViewport",       "(III)V",          (void*) android_view_GLES20Canvas_setViewport },
282    {   "nPrepare",           "(I)V",            (void*) android_view_GLES20Canvas_prepare },
283
284    {   "nSave",              "(II)I",           (void*) android_view_GLES20Canvas_save },
285    {   "nRestore",           "(I)V",            (void*) android_view_GLES20Canvas_restore },
286    {   "nRestoreToCount",    "(II)V",           (void*) android_view_GLES20Canvas_restoreToCount },
287    {   "nGetSaveCount",      "(I)I",            (void*) android_view_GLES20Canvas_getSaveCount },
288
289    {   "nSaveLayer",         "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayer },
290    {   "nSaveLayerAlpha",    "(IFFFFII)I",      (void*) android_view_GLES20Canvas_saveLayerAlpha },
291
292    {   "nQuickReject",       "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_quickReject },
293    {   "nClipRect",          "(IFFFFI)Z",       (void*) android_view_GLES20Canvas_clipRectF },
294    {   "nClipRect",          "(IIIIII)Z",       (void*) android_view_GLES20Canvas_clipRect },
295
296    {   "nTranslate",         "(IFF)V",          (void*) android_view_GLES20Canvas_translate },
297    {   "nRotate",            "(IF)V",           (void*) android_view_GLES20Canvas_rotate },
298    {   "nScale",             "(IFF)V",          (void*) android_view_GLES20Canvas_scale },
299
300    {   "nSetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_setMatrix },
301    {   "nGetMatrix",         "(II)V",           (void*) android_view_GLES20Canvas_getMatrix },
302    {   "nConcatMatrix",      "(II)V",           (void*) android_view_GLES20Canvas_concatMatrix },
303
304    {   "nDrawBitmap",        "(IIFFI)V",        (void*) android_view_GLES20Canvas_drawBitmap },
305    {   "nDrawBitmap",        "(IIFFFFFFFFI)V",  (void*) android_view_GLES20Canvas_drawBitmapRect },
306    {   "nDrawBitmap",        "(IIII)V",         (void*) android_view_GLES20Canvas_drawBitmapMatrix },
307    {   "nDrawPatch",         "(II[BFFFFI)V",    (void*) android_view_GLES20Canvas_drawPatch },
308    {   "nDrawColor",         "(III)V",          (void*) android_view_GLES20Canvas_drawColor },
309    {   "nDrawRect",          "(IFFFFI)V",       (void*) android_view_GLES20Canvas_drawRect },
310
311    {   "nResetShader",       "(I)V",            (void*) android_view_GLES20Canvas_resetShader },
312    {   "nSetupBitmapShader", "(IIIIII)V",       (void*) android_view_GLES20Canvas_setupBitmapShader },
313    {   "nSetupLinearShader", "(IIIIIIII)V",     (void*) android_view_GLES20Canvas_setupLinearShader },
314
315    {   "nDrawText",          "(I[CIIFFII)V",    (void*) android_view_GLES20Canvas_drawTextArray },
316    {   "nDrawText",          "(ILjava/lang/String;IIFFII)V",
317            (void*) android_view_GLES20Canvas_drawText },
318
319    {   "nGetClipBounds",     "(ILandroid/graphics/Rect;)Z",
320            (void*) android_view_GLES20Canvas_getClipBounds },
321};
322
323#define FIND_CLASS(var, className) \
324        var = env->FindClass(className); \
325        LOG_FATAL_IF(! var, "Unable to find class " className); \
326        var = jclass(env->NewGlobalRef(var));
327
328#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
329        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
330        LOG_FATAL_IF(! var, "Unable to find method " methodName);
331
332int register_android_view_GLES20Canvas(JNIEnv* env) {
333    FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect");
334    GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V");
335
336    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
337}
338
339};
340