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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jni.h"
#include <nativehelper/JNIHelp.h>
#include <android_runtime/AndroidRuntime.h>
#include <android_runtime/android_graphics_SurfaceTexture.h>
#include <ui/Region.h>
#include <ui/Rect.h>
#include <gui/SurfaceTexture.h>
#include <gui/SurfaceTextureClient.h>
#include <SkBitmap.h>
#include <SkCanvas.h>
namespace android {
// ----------------------------------------------------------------------------
// JNI Glue
// ----------------------------------------------------------------------------
static struct {
jmethodID set;
jfieldID left;
jfieldID top;
jfieldID right;
jfieldID bottom;
} gRectClassInfo;
static struct {
jfieldID nativeCanvas;
jfieldID surfaceFormat;
} gCanvasClassInfo;
static struct {
jfieldID nativeWindow;
} gTextureViewClassInfo;
#define GET_INT(object, field) \
env->GetIntField(object, field)
#define SET_INT(object, field, value) \
env->SetIntField(object, field, value)
#define INVOKEV(object, method, ...) \
env->CallVoidMethod(object, method, __VA_ARGS__)
// ----------------------------------------------------------------------------
// Native layer
// ----------------------------------------------------------------------------
static void android_view_TextureView_setDefaultBufferSize(JNIEnv* env, jobject,
jobject surface, jint width, jint height) {
sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, surface));
surfaceTexture->setDefaultBufferSize(width, height);
}
static inline SkBitmap::Config convertPixelFormat(int32_t format) {
switch (format) {
case WINDOW_FORMAT_RGBA_8888:
return SkBitmap::kARGB_8888_Config;
case WINDOW_FORMAT_RGBX_8888:
return SkBitmap::kARGB_8888_Config;
case WINDOW_FORMAT_RGB_565:
return SkBitmap::kRGB_565_Config;
default:
return SkBitmap::kNo_Config;
}
}
/**
* This is a private API, and this implementation is also provided in the NDK.
* However, the NDK links against android_runtime, which means that using the
* NDK implementation would create a circular dependency between the libraries.
*/
static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
Rect* inOutDirtyBounds) {
return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
}
static int32_t native_window_unlockAndPost(ANativeWindow* window) {
return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
}
static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
jobject surface) {
sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, surface));
sp<ANativeWindow> window = new SurfaceTextureClient(surfaceTexture);
window->incStrong(0);
SET_INT(textureView, gTextureViewClassInfo.nativeWindow, jint(window.get()));
}
static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
ANativeWindow* nativeWindow = (ANativeWindow*)
GET_INT(textureView, gTextureViewClassInfo.nativeWindow);
if (nativeWindow) {
sp<ANativeWindow> window(nativeWindow);
window->decStrong(0);
SET_INT(textureView, gTextureViewClassInfo.nativeWindow, 0);
}
}
static void android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
jint nativeWindow, jobject canvas, jobject dirtyRect) {
if (!nativeWindow) {
return;
}
ANativeWindow_Buffer buffer;
Rect rect;
if (dirtyRect) {
rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
} else {
rect.set(Rect(0x3FFF, 0x3FFF));
}
sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
native_window_lock(window.get(), &buffer, &rect);
ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format);
SkBitmap bitmap;
bitmap.setConfig(convertPixelFormat(buffer.format), buffer.width, buffer.height, bytesCount);
if (buffer.format == WINDOW_FORMAT_RGBX_8888) {
bitmap.setIsOpaque(true);
}
if (buffer.width > 0 && buffer.height > 0) {
bitmap.setPixels(buffer.bits);
} else {
bitmap.setPixels(NULL);
}
SET_INT(canvas, gCanvasClassInfo.surfaceFormat, buffer.format);
SkCanvas* nativeCanvas = (SkCanvas*) GET_INT(canvas, gCanvasClassInfo.nativeCanvas);
nativeCanvas->setBitmapDevice(bitmap);
SkRect clipRect;
clipRect.set(rect.left, rect.top, rect.right, rect.bottom);
nativeCanvas->clipRect(clipRect);
if (dirtyRect) {
INVOKEV(dirtyRect, gRectClassInfo.set,
int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
}
}
static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
jint nativeWindow, jobject canvas) {
SkCanvas* nativeCanvas = (SkCanvas*) GET_INT(canvas, gCanvasClassInfo.nativeCanvas);
nativeCanvas->setBitmapDevice(SkBitmap());
if (nativeWindow) {
sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
native_window_unlockAndPost(window.get());
}
}
// ----------------------------------------------------------------------------
// JNI Glue
// ----------------------------------------------------------------------------
const char* const kClassPathName = "android/view/TextureView";
static JNINativeMethod gMethods[] = {
{ "nSetDefaultBufferSize", "(Landroid/graphics/SurfaceTexture;II)V",
(void*) android_view_TextureView_setDefaultBufferSize },
{ "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
(void*) android_view_TextureView_createNativeWindow },
{ "nDestroyNativeWindow", "()V",
(void*) android_view_TextureView_destroyNativeWindow },
{ "nLockCanvas", "(ILandroid/graphics/Canvas;Landroid/graphics/Rect;)V",
(void*) android_view_TextureView_lockCanvas },
{ "nUnlockCanvasAndPost", "(ILandroid/graphics/Canvas;)V",
(void*) android_view_TextureView_unlockCanvasAndPost },
};
#define FIND_CLASS(var, className) \
var = env->FindClass(className); \
LOG_FATAL_IF(!var, "Unable to find class " className);
#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
var = env->GetMethodID(clazz, methodName, methodDescriptor); \
LOG_FATAL_IF(!var, "Unable to find method " methodName);
#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
LOG_FATAL_IF(!var, "Unable to find field" fieldName);
int register_android_view_TextureView(JNIEnv* env) {
jclass clazz;
FIND_CLASS(clazz, "android/graphics/Rect");
GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V");
GET_FIELD_ID(gRectClassInfo.left, clazz, "left", "I");
GET_FIELD_ID(gRectClassInfo.top, clazz, "top", "I");
GET_FIELD_ID(gRectClassInfo.right, clazz, "right", "I");
GET_FIELD_ID(gRectClassInfo.bottom, clazz, "bottom", "I");
FIND_CLASS(clazz, "android/graphics/Canvas");
GET_FIELD_ID(gCanvasClassInfo.nativeCanvas, clazz, "mNativeCanvas", "I");
GET_FIELD_ID(gCanvasClassInfo.surfaceFormat, clazz, "mSurfaceFormat", "I");
FIND_CLASS(clazz, "android/view/TextureView");
GET_FIELD_ID(gTextureViewClassInfo.nativeWindow, clazz, "mNativeWindow", "I");
return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
}
};
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