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 #include "core_jni_helpers.h" 35 36 namespace android { 37 38 // ---------------------------------------------------------------------------- 39 // JNI Glue 40 // ---------------------------------------------------------------------------- 41 42 static struct { 43 jmethodID set; 44 jfieldID left; 45 jfieldID top; 46 jfieldID right; 47 jfieldID bottom; 48 } gRectClassInfo; 49 50 static struct { 51 jfieldID nativeWindow; 52 } gTextureViewClassInfo; 53 54 #define GET_INT(object, field) \ 55 env->GetIntField(object, field) 56 57 #define GET_LONG(object, field) \ 58 env->GetLongField(object, field) 59 60 #define SET_INT(object, field, value) \ 61 env->SetIntField(object, field, value) 62 63 #define SET_LONG(object, field, value) \ 64 env->SetLongField(object, field, value) 65 66 #define INVOKEV(object, method, ...) \ 67 env->CallVoidMethod(object, method, __VA_ARGS__) 68 69 // ---------------------------------------------------------------------------- 70 // Native layer 71 // ---------------------------------------------------------------------------- 72 73 // FIXME: consider exporting this to share (e.g. android_view_Surface.cpp) 74 static inline SkImageInfo convertPixelFormat(const ANativeWindow_Buffer& buffer) { 75 SkColorType colorType = kUnknown_SkColorType; 76 SkAlphaType alphaType = kOpaque_SkAlphaType; 77 switch (buffer.format) { 78 case WINDOW_FORMAT_RGBA_8888: 79 colorType = kN32_SkColorType; 80 alphaType = kPremul_SkAlphaType; 81 break; 82 case WINDOW_FORMAT_RGBX_8888: 83 colorType = kN32_SkColorType; 84 alphaType = kOpaque_SkAlphaType; 85 break; 86 case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT: 87 colorType = kRGBA_F16_SkColorType; 88 alphaType = kPremul_SkAlphaType; 89 break; 90 case WINDOW_FORMAT_RGB_565: 91 colorType = kRGB_565_SkColorType; 92 alphaType = kOpaque_SkAlphaType; 93 break; 94 default: 95 break; 96 } 97 return SkImageInfo::Make(buffer.width, buffer.height, colorType, alphaType, 98 GraphicsJNI::defaultColorSpace()); 99 } 100 101 /** 102 * This is a private API, and this implementation is also provided in the NDK. 103 * However, the NDK links against android_runtime, which means that using the 104 * NDK implementation would create a circular dependency between the libraries. 105 */ 106 static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer, 107 Rect* inOutDirtyBounds) { 108 return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds); 109 } 110 111 static int32_t native_window_unlockAndPost(ANativeWindow* window) { 112 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST); 113 } 114 115 static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView, 116 jobject surface) { 117 118 sp<IGraphicBufferProducer> producer(SurfaceTexture_getProducer(env, surface)); 119 sp<ANativeWindow> window = new Surface(producer, true); 120 121 window->incStrong((void*)android_view_TextureView_createNativeWindow); 122 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, jlong(window.get())); 123 } 124 125 static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) { 126 127 ANativeWindow* nativeWindow = (ANativeWindow*) 128 GET_LONG(textureView, gTextureViewClassInfo.nativeWindow); 129 130 if (nativeWindow) { 131 sp<ANativeWindow> window(nativeWindow); 132 window->decStrong((void*)android_view_TextureView_createNativeWindow); 133 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, 0); 134 } 135 } 136 137 static jboolean android_view_TextureView_lockCanvas(JNIEnv* env, jobject, 138 jlong nativeWindow, jobject canvas, jobject dirtyRect) { 139 140 if (!nativeWindow) { 141 return JNI_FALSE; 142 } 143 144 ANativeWindow_Buffer buffer; 145 146 Rect rect(Rect::EMPTY_RECT); 147 if (dirtyRect) { 148 rect.left = GET_INT(dirtyRect, gRectClassInfo.left); 149 rect.top = GET_INT(dirtyRect, gRectClassInfo.top); 150 rect.right = GET_INT(dirtyRect, gRectClassInfo.right); 151 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom); 152 } else { 153 rect.set(Rect(0x3FFF, 0x3FFF)); 154 } 155 156 sp<ANativeWindow> window((ANativeWindow*) nativeWindow); 157 int32_t status = native_window_lock(window.get(), &buffer, &rect); 158 if (status) return JNI_FALSE; 159 160 ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format); 161 162 SkBitmap bitmap; 163 bitmap.setInfo(convertPixelFormat(buffer), bytesCount); 164 165 if (buffer.width > 0 && buffer.height > 0) { 166 bitmap.setPixels(buffer.bits); 167 } else { 168 bitmap.setPixels(NULL); 169 } 170 171 Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas); 172 nativeCanvas->setBitmap(bitmap); 173 nativeCanvas->clipRect(rect.left, rect.top, rect.right, rect.bottom, 174 SkClipOp::kIntersect); 175 176 if (dirtyRect) { 177 INVOKEV(dirtyRect, gRectClassInfo.set, 178 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom)); 179 } 180 181 return JNI_TRUE; 182 } 183 184 static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject, 185 jlong nativeWindow, jobject canvas) { 186 187 Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas); 188 nativeCanvas->setBitmap(SkBitmap()); 189 190 if (nativeWindow) { 191 sp<ANativeWindow> window((ANativeWindow*) nativeWindow); 192 native_window_unlockAndPost(window.get()); 193 } 194 } 195 196 // ---------------------------------------------------------------------------- 197 // JNI Glue 198 // ---------------------------------------------------------------------------- 199 200 const char* const kClassPathName = "android/view/TextureView"; 201 202 static const JNINativeMethod gMethods[] = { 203 { "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V", 204 (void*) android_view_TextureView_createNativeWindow }, 205 { "nDestroyNativeWindow", "()V", 206 (void*) android_view_TextureView_destroyNativeWindow }, 207 208 { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z", 209 (void*) android_view_TextureView_lockCanvas }, 210 { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)V", 211 (void*) android_view_TextureView_unlockCanvasAndPost }, 212 }; 213 214 int register_android_view_TextureView(JNIEnv* env) { 215 jclass clazz = FindClassOrDie(env, "android/graphics/Rect"); 216 gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V"); 217 gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I"); 218 gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I"); 219 gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I"); 220 gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I"); 221 222 clazz = FindClassOrDie(env, "android/view/TextureView"); 223 gTextureViewClassInfo.nativeWindow = GetFieldIDOrDie(env, clazz, "mNativeWindow", "J"); 224 225 return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods)); 226 } 227 228 }; 229
