Android C++ 绘图

    看了几天SurfaceFlinger源码，发现在Android源码环境下可以用C++来进行绘图操作，特将代码记下，以供后来参考

testsurface.cpp

#include <cutils/memory.h>

#include <unistd.h>
#include <utils/Log.h>

#include <binder/IPCThreadState.h>
#include <binder/ProcessState.h>
#include <binder/IServiceManager.h>

#include <gui/Surface.h>
#include <gui/SurfaceComposerClient.h>
#include <ui/DisplayInfo.h>
#include <ui/Rect.h>
#include <ui/Region.h>

#include <SkGraphics.h>
#include <SkBitmap.h>
#include <SkCanvas.h>
#include <SkDevice.h>
#include <SkStream.h>
#include <images/SkImageDecoder.h>

#include <hardware/hwcomposer_defs.h>
using namespace android;

static SkBitmap::Config convertPixelFormat(PixelFormat format) {
    /* note: if PIXEL_FORMAT_RGBX_8888 means that all alpha bytes are 0xFF, then
        we can map to SkBitmap::kARGB_8888_Config, and opti