1 /*
2 * Copyright (C) 2011 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 <android_runtime/android_graphics_SurfaceTexture.h>
21
22 #include <ui/Region.h>
23 #include <ui/Rect.h>
24
25 #include <gui/SurfaceTexture.h>
26 #include <gui/SurfaceTextureClient.h>
27
28 #include <SkBitmap.h>
29 #include <SkCanvas.h>
30
31 namespace android {
32
33 // ----------------------------------------------------------------------------
34 // JNI Glue
35 // ----------------------------------------------------------------------------
36
37 static struct {
38 jmethodID set;
39 jfieldID left;
40 jfieldID top;
41 jfieldID right;
42 jfieldID bottom;
43 } gRectClassInfo;
44
45 static struct {
46 jfieldID nativeCanvas;
47 jfieldID surfaceFormat;
48 } gCanvasClassInfo;
49
50 static struct {
51 jfieldID nativeWindow;
52 } gTextureViewClassInfo;
53
54 #define GET_INT(object, field) \
55 env->GetIntField(object, field)
56
57 #define SET_INT(object, field, value) \
58 env->SetIntField(object, field, value)
59
60 #define INVOKEV(object, method, ...) \
61 env->CallVoidMethod(object, method, __VA_ARGS__)
62
63 // ----------------------------------------------------------------------------
64 // Native layer
65 // ----------------------------------------------------------------------------
66
android_view_TextureView_setDefaultBufferSize(JNIEnv * env,jobject,jobject surface,jint width,jint height)67 static void android_view_TextureView_setDefaultBufferSize(JNIEnv* env, jobject,
68 jobject surface, jint width, jint height) {
69
70 sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, surface));
71 surfaceTexture->setDefaultBufferSize(width, height);
72 }
73
convertPixelFormat(int32_t format)74 static inline SkBitmap::Config convertPixelFormat(int32_t format) {
75 switch (format) {
76 case WINDOW_FORMAT_RGBA_8888:
77 return SkBitmap::kARGB_8888_Config;
78 case WINDOW_FORMAT_RGBX_8888:
79 return SkBitmap::kARGB_8888_Config;
80 case WINDOW_FORMAT_RGB_565:
81 return SkBitmap::kRGB_565_Config;
82 default:
83 return SkBitmap::kNo_Config;
84 }
85 }
86
87 /**
88 * This is a private API, and this implementation is also provided in the NDK.
89 * However, the NDK links against android_runtime, which means that using the
90 * NDK implementation would create a circular dependency between the libraries.
91 */
native_window_lock(ANativeWindow * window,ANativeWindow_Buffer * outBuffer,Rect * inOutDirtyBounds)92 static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
93 Rect* inOutDirtyBounds) {
94 return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
95 }
96
native_window_unlockAndPost(ANativeWindow * window)97 static int32_t native_window_unlockAndPost(ANativeWindow* window) {
98 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
99 }
100
android_view_TextureView_createNativeWindow(JNIEnv * env,jobject textureView,jobject surface)101 static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
102 jobject surface) {
103
104 sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, surface));
105 sp<ANativeWindow> window = new SurfaceTextureClient(surfaceTexture);
106
107 window->incStrong(0);
108 SET_INT(textureView, gTextureViewClassInfo.nativeWindow, jint(window.get()));
109 }
110
android_view_TextureView_destroyNativeWindow(JNIEnv * env,jobject textureView)111 static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
112
113 ANativeWindow* nativeWindow = (ANativeWindow*)
114 GET_INT(textureView, gTextureViewClassInfo.nativeWindow);
115
116 if (nativeWindow) {
117 sp<ANativeWindow> window(nativeWindow);
118 window->decStrong(0);
119 SET_INT(textureView, gTextureViewClassInfo.nativeWindow, 0);
120 }
121 }
122
android_view_TextureView_lockCanvas(JNIEnv * env,jobject,jint nativeWindow,jobject canvas,jobject dirtyRect)123 static void android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
124 jint nativeWindow, jobject canvas, jobject dirtyRect) {
125
126 if (!nativeWindow) {
127 return;
128 }
129
130 ANativeWindow_Buffer buffer;
131
132 Rect rect;
133 if (dirtyRect) {
134 rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
135 rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
136 rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
137 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
138 } else {
139 rect.set(Rect(0x3FFF, 0x3FFF));
140 }
141
142 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
143 native_window_lock(window.get(), &buffer, &rect);
144
145 ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format);
146
147 SkBitmap bitmap;
148 bitmap.setConfig(convertPixelFormat(buffer.format), buffer.width, buffer.height, bytesCount);
149
150 if (buffer.format == WINDOW_FORMAT_RGBX_8888) {
151 bitmap.setIsOpaque(true);
152 }
153
154 if (buffer.width > 0 && buffer.height > 0) {
155 bitmap.setPixels(buffer.bits);
156 } else {
157 bitmap.setPixels(NULL);
158 }
159
160 SET_INT(canvas, gCanvasClassInfo.surfaceFormat, buffer.format);
161 SkCanvas* nativeCanvas = (SkCanvas*) GET_INT(canvas, gCanvasClassInfo.nativeCanvas);
162 nativeCanvas->setBitmapDevice(bitmap);
163
164 SkRect clipRect;
165 clipRect.set(rect.left, rect.top, rect.right, rect.bottom);
166 nativeCanvas->clipRect(clipRect);
167
168 if (dirtyRect) {
169 INVOKEV(dirtyRect, gRectClassInfo.set,
170 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
171 }
172 }
173
android_view_TextureView_unlockCanvasAndPost(JNIEnv * env,jobject,jint nativeWindow,jobject canvas)174 static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
175 jint nativeWindow, jobject canvas) {
176
177 SkCanvas* nativeCanvas = (SkCanvas*) GET_INT(canvas, gCanvasClassInfo.nativeCanvas);
178 nativeCanvas->setBitmapDevice(SkBitmap());
179
180 if (nativeWindow) {
181 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
182 native_window_unlockAndPost(window.get());
183 }
184 }
185
186 // ----------------------------------------------------------------------------
187 // JNI Glue
188 // ----------------------------------------------------------------------------
189
190 const char* const kClassPathName = "android/view/TextureView";
191
192 static JNINativeMethod gMethods[] = {
193 { "nSetDefaultBufferSize", "(Landroid/graphics/SurfaceTexture;II)V",
194 (void*) android_view_TextureView_setDefaultBufferSize },
195
196 { "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
197 (void*) android_view_TextureView_createNativeWindow },
198 { "nDestroyNativeWindow", "()V",
199 (void*) android_view_TextureView_destroyNativeWindow },
200
201 { "nLockCanvas", "(ILandroid/graphics/Canvas;Landroid/graphics/Rect;)V",
202 (void*) android_view_TextureView_lockCanvas },
203 { "nUnlockCanvasAndPost", "(ILandroid/graphics/Canvas;)V",
204 (void*) android_view_TextureView_unlockCanvasAndPost },
205 };
206
207 #define FIND_CLASS(var, className) \
208 var = env->FindClass(className); \
209 LOG_FATAL_IF(!var, "Unable to find class " className);
210
211 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
212 var = env->GetMethodID(clazz, methodName, methodDescriptor); \
213 LOG_FATAL_IF(!var, "Unable to find method " methodName);
214
215 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
216 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
217 LOG_FATAL_IF(!var, "Unable to find field" fieldName);
218
register_android_view_TextureView(JNIEnv * env)219 int register_android_view_TextureView(JNIEnv* env) {
220 jclass clazz;
221 FIND_CLASS(clazz, "android/graphics/Rect");
222 GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V");
223 GET_FIELD_ID(gRectClassInfo.left, clazz, "left", "I");
224 GET_FIELD_ID(gRectClassInfo.top, clazz, "top", "I");
225 GET_FIELD_ID(gRectClassInfo.right, clazz, "right", "I");
226 GET_FIELD_ID(gRectClassInfo.bottom, clazz, "bottom", "I");
227
228 FIND_CLASS(clazz, "android/graphics/Canvas");
229 GET_FIELD_ID(gCanvasClassInfo.nativeCanvas, clazz, "mNativeCanvas", "I");
230 GET_FIELD_ID(gCanvasClassInfo.surfaceFormat, clazz, "mSurfaceFormat", "I");
231
232 FIND_CLASS(clazz, "android/view/TextureView");
233 GET_FIELD_ID(gTextureViewClassInfo.nativeWindow, clazz, "mNativeWindow", "I");
234
235 return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
236 }
237
238 };
239