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) 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 */ 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 } 109 110 static int32_t native_window_unlockAndPost(ANativeWindow* window) { 111 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST); 112 } 113 114 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 } 123 124 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 } 135 136 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 } 185 186 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); 226 227 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
