/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "jni.h"
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#include <nativehelper/JNIHelp.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <android_runtime/android_graphics_SurfaceTexture.h>
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#include <ui/Region.h>
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#include <ui/Rect.h>
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#include <gui/GLConsumer.h>
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#include <gui/Surface.h>
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#include <SkBitmap.h>
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#include <SkCanvas.h>
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#include <SkImage.h>
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#include "android/graphics/GraphicsJNI.h"
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#include "core_jni_helpers.h"
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namespace android {
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// ----------------------------------------------------------------------------
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// JNI Glue
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// ----------------------------------------------------------------------------
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static struct {
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jmethodID set;
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jfieldID left;
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jfieldID top;
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jfieldID right;
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jfieldID bottom;
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} gRectClassInfo;
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static struct {
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jfieldID nativeWindow;
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} gTextureViewClassInfo;
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#define GET_INT(object, field) \
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env->GetIntField(object, field)
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#define GET_LONG(object, field) \
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env->GetLongField(object, field)
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#define SET_INT(object, field, value) \
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env->SetIntField(object, field, value)
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#define SET_LONG(object, field, value) \
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env->SetLongField(object, field, value)
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#define INVOKEV(object, method, ...) \
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env->CallVoidMethod(object, method, __VA_ARGS__)
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// ----------------------------------------------------------------------------
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// Native layer
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// ----------------------------------------------------------------------------
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// FIXME: consider exporting this to share (e.g. android_view_Surface.cpp)
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static inline SkImageInfo convertPixelFormat(const ANativeWindow_Buffer& buffer) {
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SkColorType colorType = kUnknown_SkColorType;
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SkAlphaType alphaType = kOpaque_SkAlphaType;
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switch (buffer.format) {
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case WINDOW_FORMAT_RGBA_8888:
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colorType = kN32_SkColorType;
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alphaType = kPremul_SkAlphaType;
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break;
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case WINDOW_FORMAT_RGBX_8888:
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colorType = kN32_SkColorType;
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alphaType = kOpaque_SkAlphaType;
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break;
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case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT:
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colorType = kRGBA_F16_SkColorType;
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alphaType = kPremul_SkAlphaType;
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break;
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case WINDOW_FORMAT_RGB_565:
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colorType = kRGB_565_SkColorType;
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alphaType = kOpaque_SkAlphaType;
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break;
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default:
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break;
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}
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return SkImageInfo::Make(buffer.width, buffer.height, colorType, alphaType);
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}
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/**
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* This is a private API, and this implementation is also provided in the NDK.
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* However, the NDK links against android_runtime, which means that using the
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* NDK implementation would create a circular dependency between the libraries.
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*/
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static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
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Rect* inOutDirtyBounds) {
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return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
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}
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static int32_t native_window_unlockAndPost(ANativeWindow* window) {
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return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
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}
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static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
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jobject surface) {
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sp<IGraphicBufferProducer> producer(SurfaceTexture_getProducer(env, surface));
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sp<ANativeWindow> window = new Surface(producer, true);
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window->incStrong((void*)android_view_TextureView_createNativeWindow);
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SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, jlong(window.get()));
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}
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static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
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ANativeWindow* nativeWindow = (ANativeWindow*)
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GET_LONG(textureView, gTextureViewClassInfo.nativeWindow);
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if (nativeWindow) {
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sp<ANativeWindow> window(nativeWindow);
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window->decStrong((void*)android_view_TextureView_createNativeWindow);
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SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, 0);
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}
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}
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static jboolean android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
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jlong nativeWindow, jobject canvas, jobject dirtyRect) {
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if (!nativeWindow) {
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return JNI_FALSE;
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}
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ANativeWindow_Buffer buffer;
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Rect rect(Rect::EMPTY_RECT);
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if (dirtyRect) {
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rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
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rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
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rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
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rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
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} else {
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rect.set(Rect(0x3FFF, 0x3FFF));
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}
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sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
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int32_t status = native_window_lock(window.get(), &buffer, &rect);
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if (status) return JNI_FALSE;
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ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format);
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SkBitmap bitmap;
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bitmap.setInfo(convertPixelFormat(buffer), bytesCount);
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if (buffer.width > 0 && buffer.height > 0) {
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bitmap.setPixels(buffer.bits);
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} else {
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bitmap.setPixels(NULL);
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}
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Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
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nativeCanvas->setBitmap(bitmap);
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nativeCanvas->clipRect(rect.left, rect.top, rect.right, rect.bottom,
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SkClipOp::kIntersect);
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if (dirtyRect) {
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INVOKEV(dirtyRect, gRectClassInfo.set,
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int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
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}
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return JNI_TRUE;
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}
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static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
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jlong nativeWindow, jobject canvas) {
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Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
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nativeCanvas->setBitmap(SkBitmap());
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if (nativeWindow) {
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sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
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native_window_unlockAndPost(window.get());
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}
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}
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// ----------------------------------------------------------------------------
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// JNI Glue
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// ----------------------------------------------------------------------------
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const char* const kClassPathName = "android/view/TextureView";
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static const JNINativeMethod gMethods[] = {
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{ "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
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(void*) android_view_TextureView_createNativeWindow },
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{ "nDestroyNativeWindow", "()V",
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(void*) android_view_TextureView_destroyNativeWindow },
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{ "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z",
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(void*) android_view_TextureView_lockCanvas },
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{ "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)V",
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(void*) android_view_TextureView_unlockCanvasAndPost },
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};
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int register_android_view_TextureView(JNIEnv* env) {
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jclass clazz = FindClassOrDie(env, "android/graphics/Rect");
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gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V");
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gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I");
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gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I");
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gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I");
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gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I");
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clazz = FindClassOrDie(env, "android/view/TextureView");
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gTextureViewClassInfo.nativeWindow = GetFieldIDOrDie(env, clazz, "mNativeWindow", "J");
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return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
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}
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};
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