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/GLConsumer.h>
26 #include <gui/Surface.h>
27
28 #include <SkBitmap.h>
29 #include <SkCanvas.h>
30 #include <SkImage.h>
31
32 #include "android/graphics/GraphicsJNI.h"
33
34 namespace android {
35
36 // ----------------------------------------------------------------------------
37 // JNI Glue
38 // ----------------------------------------------------------------------------
39
40 static struct {
41 jmethodID set;
42 jfieldID left;
43 jfieldID top;
44 jfieldID right;
45 jfieldID bottom;
46 } gRectClassInfo;
47
48 static struct {
49 jfieldID mSurfaceFormat;
50 jmethodID setNativeBitmap;
51 } gCanvasClassInfo;
52
53 static struct {
54 jfieldID nativeWindow;
55 } gTextureViewClassInfo;
56
57 #define GET_INT(object, field) \
58 env->GetIntField(object, field)
59
60 #define GET_LONG(object, field) \
61 env->GetLongField(object, field)
62
63 #define SET_INT(object, field, value) \
64 env->SetIntField(object, field, value)
65
66 #define SET_LONG(object, field, value) \
67 env->SetLongField(object, field, value)
68
69 #define INVOKEV(object, method, ...) \
70 env->CallVoidMethod(object, method, __VA_ARGS__)
71
72 // ----------------------------------------------------------------------------
73 // Native layer
74 // ----------------------------------------------------------------------------
75
76 // FIXME: consider exporting this to share (e.g. android_view_Surface.cpp)
convertPixelFormat(const ANativeWindow_Buffer & buffer)77 static inline SkImageInfo convertPixelFormat(const ANativeWindow_Buffer& buffer) {
78 SkImageInfo info;
79 info.fWidth = buffer.width;
80 info.fHeight = buffer.height;
81 switch (buffer.format) {
82 case WINDOW_FORMAT_RGBA_8888:
83 info.fColorType = kN32_SkColorType;
84 info.fAlphaType = kPremul_SkAlphaType;
85 break;
86 case WINDOW_FORMAT_RGBX_8888:
87 info.fColorType = kN32_SkColorType;
88 info.fAlphaType = kOpaque_SkAlphaType;
89 case WINDOW_FORMAT_RGB_565:
90 info.fColorType = kRGB_565_SkColorType;
91 info.fAlphaType = kOpaque_SkAlphaType;
92 default:
93 info.fColorType = kUnknown_SkColorType;
94 info.fAlphaType = kIgnore_SkAlphaType;
95 break;
96 }
97 return info;
98 }
99
100 /**
101 * This is a private API, and this implementation is also provided in the NDK.
102 * However, the NDK links against android_runtime, which means that using the
103 * NDK implementation would create a circular dependency between the libraries.
104 */
native_window_lock(ANativeWindow * window,ANativeWindow_Buffer * outBuffer,Rect * inOutDirtyBounds)105 static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
106 Rect* inOutDirtyBounds) {
107 return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
108 }
109
native_window_unlockAndPost(ANativeWindow * window)110 static int32_t native_window_unlockAndPost(ANativeWindow* window) {
111 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
112 }
113
android_view_TextureView_createNativeWindow(JNIEnv * env,jobject textureView,jobject surface)114 static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
115 jobject surface) {
116
117 sp<IGraphicBufferProducer> producer(SurfaceTexture_getProducer(env, surface));
118 sp<ANativeWindow> window = new Surface(producer, true);
119
120 window->incStrong((void*)android_view_TextureView_createNativeWindow);
121 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, jlong(window.get()));
122 }
123
android_view_TextureView_destroyNativeWindow(JNIEnv * env,jobject textureView)124 static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
125
126 ANativeWindow* nativeWindow = (ANativeWindow*)
127 GET_LONG(textureView, gTextureViewClassInfo.nativeWindow);
128
129 if (nativeWindow) {
130 sp<ANativeWindow> window(nativeWindow);
131 window->decStrong((void*)android_view_TextureView_createNativeWindow);
132 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, 0);
133 }
134 }
135
android_view_TextureView_lockCanvas(JNIEnv * env,jobject,jlong nativeWindow,jobject canvas,jobject dirtyRect)136 static jboolean android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
137 jlong nativeWindow, jobject canvas, jobject dirtyRect) {
138
139 if (!nativeWindow) {
140 return JNI_FALSE;
141 }
142
143 ANativeWindow_Buffer buffer;
144
145 Rect rect;
146 if (dirtyRect) {
147 rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
148 rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
149 rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
150 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
151 } else {
152 rect.set(Rect(0x3FFF, 0x3FFF));
153 }
154
155 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
156 int32_t status = native_window_lock(window.get(), &buffer, &rect);
157 if (status) return JNI_FALSE;
158
159 ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format);
160
161 SkBitmap bitmap;
162 bitmap.setInfo(convertPixelFormat(buffer), bytesCount);
163
164 if (buffer.width > 0 && buffer.height > 0) {
165 bitmap.setPixels(buffer.bits);
166 } else {
167 bitmap.setPixels(NULL);
168 }
169
170 SET_INT(canvas, gCanvasClassInfo.mSurfaceFormat, buffer.format);
171 INVOKEV(canvas, gCanvasClassInfo.setNativeBitmap, reinterpret_cast<jlong>(&bitmap));
172
173 SkRect clipRect;
174 clipRect.set(rect.left, rect.top, rect.right, rect.bottom);
175 SkCanvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
176 nativeCanvas->clipRect(clipRect);
177
178 if (dirtyRect) {
179 INVOKEV(dirtyRect, gRectClassInfo.set,
180 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
181 }
182
183 return JNI_TRUE;
184 }
185
android_view_TextureView_unlockCanvasAndPost(JNIEnv * env,jobject,jlong nativeWindow,jobject canvas)186 static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
187 jlong nativeWindow, jobject canvas) {
188
189 INVOKEV(canvas, gCanvasClassInfo.setNativeBitmap, (jlong)0);
190
191 if (nativeWindow) {
192 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
193 native_window_unlockAndPost(window.get());
194 }
195 }
196
197 // ----------------------------------------------------------------------------
198 // JNI Glue
199 // ----------------------------------------------------------------------------
200
201 const char* const kClassPathName = "android/view/TextureView";
202
203 static JNINativeMethod gMethods[] = {
204 { "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
205 (void*) android_view_TextureView_createNativeWindow },
206 { "nDestroyNativeWindow", "()V",
207 (void*) android_view_TextureView_destroyNativeWindow },
208
209 { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z",
210 (void*) android_view_TextureView_lockCanvas },
211 { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)V",
212 (void*) android_view_TextureView_unlockCanvasAndPost },
213 };
214
215 #define FIND_CLASS(var, className) \
216 var = env->FindClass(className); \
217 LOG_FATAL_IF(!var, "Unable to find class " className);
218
219 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
220 var = env->GetMethodID(clazz, methodName, methodDescriptor); \
221 LOG_FATAL_IF(!var, "Unable to find method " methodName);
222
223 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
224 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
225 LOG_FATAL_IF(!var, "Unable to find field" fieldName);
226
register_android_view_TextureView(JNIEnv * env)227 int register_android_view_TextureView(JNIEnv* env) {
228 jclass clazz;
229 FIND_CLASS(clazz, "android/graphics/Rect");
230 GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V");
231 GET_FIELD_ID(gRectClassInfo.left, clazz, "left", "I");
232 GET_FIELD_ID(gRectClassInfo.top, clazz, "top", "I");
233 GET_FIELD_ID(gRectClassInfo.right, clazz, "right", "I");
234 GET_FIELD_ID(gRectClassInfo.bottom, clazz, "bottom", "I");
235
236 FIND_CLASS(clazz, "android/graphics/Canvas");
237 GET_FIELD_ID(gCanvasClassInfo.mSurfaceFormat, clazz, "mSurfaceFormat", "I");
238 GET_METHOD_ID(gCanvasClassInfo.setNativeBitmap, clazz, "setNativeBitmap", "(J)V");
239
240 FIND_CLASS(clazz, "android/view/TextureView");
241 GET_FIELD_ID(gTextureViewClassInfo.nativeWindow, clazz, "mNativeWindow", "J");
242
243 return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
244 }
245
246 };
247