Android用C++创建surface显示RGB数据

转自：http://blog.csdn.net/tung214/article/details/36628897

以下在Android 4.4平台开发测试，用于在屏幕直接显示RGB数据，当然，如果要直接显示YUV，写个函数转换一下也能直接显示。

其中从文件中获取RGB的RGB数据可以从这里下载 http://kc.cc/WeVp

 #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 <gui/ISurfaceComposer.h>
 #include <ui/DisplayInfo.h>
 #include <ui/Rect.h>
 #include <ui/Region.h>
 #include <android/native_window.h>
 #include <SkGraphics.h>
 #include <SkBitmap.h>
 #include <SkCanvas.h>
 #include <SkDevice.h>
 #include <SkStream.h>
 #include <SkImageDecoder.h>

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

 static inline 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 optionally call
         bitmap.setIsOpaque(true) on the resulting SkBitmap (as an accelerator)
     */
     switch (format) {
     case PIXEL_FORMAT_RGBX_8888:    return SkBitmap::kARGB_8888_Config;
     case PIXEL_FORMAT_RGBA_8888:    return SkBitmap::kARGB_8888_Config;
     case PIXEL_FORMAT_RGB_565:      return SkBitmap::kRGB_565_Config;
     default:                        return SkBitmap::kNo_Config;
     }
 }

 int main(int argc, char** argv)
 {
     // set up the thread-pool
     sp<ProcessState> proc(ProcessState::self());
     ProcessState::self()->startThreadPool();

     // create a client to surfaceflinger
     sp<SurfaceComposerClient> client = new SurfaceComposerClient();
     //DisplayoutBuffer display;
     //client->getDisplayoutBuffer(client->getBuiltInDisplay(HWC_DISPLAY_PRIMARY), &display);
     sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
             ISurfaceComposer::eDisplayIdMain));
     DisplayInfo dinfo;
     //获取屏幕的宽高等信息
     status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
     printf("w=%d,h=%d,xdpi=%f,ydpi=%f,fps=%f,ds=%f\n",
         dinfo.w, dinfo.h, dinfo.xdpi, dinfo.ydpi, dinfo.fps, dinfo.density);
     if (status)
         return -1;
     sp<SurfaceControl> surfaceControl = client->createSurface(String8("testsurface"),
             dinfo.w, dinfo.h, PIXEL_FORMAT_RGB_565, 0);

 /****************************第一张图******************************************************/
     SurfaceComposerClient::openGlobalTransaction();
     surfaceControl->setLayer(100000);//设定Z坐标
     surfaceControl->setPosition(0, 0);//以左上角为(0,0)设定显示位置
     SurfaceComposerClient::closeGlobalTransaction();
     surfaceControl->show();//感觉没有这步,图片也能显示
     sp<Surface> surface = surfaceControl->getSurface();

     ANativeWindow_Buffer outBuffer;
     //Surface::SurfaceoutBuffer outBuffer;
     surface->lock(&outBuffer,NULL);//获取surface缓冲区的地址
     ssize_t bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
     android_memset16((uint16_t*)outBuffer.bits, 0xF800, bpr*outBuffer.height);//往surface缓冲区塞要显示的RGB内容
     surface->unlockAndPost();
     sleep(3);

 //从文件中获取RGB数据显示 下载地址：http://kc.cc/WeVp
 /****************************第二张图******************************************************/
     SurfaceComposerClient::openGlobalTransaction();
     surfaceControl->setSize(480, 272);
     surfaceControl->setPosition(100, 100);
     SurfaceComposerClient::closeGlobalTransaction();
     surfaceControl->show();//感觉没有这步，图片也能显示

     FILE *fp = fopen("/tmp/rgb565.rgb","rb");//我们从一个文件里获取RGB565图像数据 480*272
     if(fp != NULL){
         unsigned char *rgb565Data = new unsigned char[480*272*2];
         memset(rgb565Data,0x00,480*272*2);
         fread(rgb565Data,1,480*272*2,fp);
         surface->lock(&outBuffer,NULL);
         //bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
         //android_memset16((uint16_t*)outBuffer.bits, 0x04E0, bpr*outBuffer.height);
         memcpy(outBuffer.bits,rgb565Data,480*272*2);
         delete[] rgb565Data;
         surface->unlockAndPost();
     }
     fclose(fp);
     sleep(3);

 //用skia画图
 /*******************************第三张图***************************************************/
     SurfaceComposerClient::openGlobalTransaction();
     surfaceControl->setSize(320, 420);
     surfaceControl->setPosition(100, 100);
     SurfaceComposerClient::closeGlobalTransaction();
     surfaceControl->show();//感觉没有这部图片也能显示

     SkPaint paint;
     paint.setColor(SK_ColorBLUE);
     Rect rect(0, 0, 320, 240);
     Region dirtyRegion(rect);

     surface->lock(&outBuffer, &rect);
     bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
 //    printf("w=%d,h=%d,bpr=%d,fmt=%d,bits=%p\n", outBuffer.w, outBuffer.h, bpr, outBuffer.format, outBuffer.bits);
     SkBitmap bitmap;
     bitmap.setConfig(convertPixelFormat(outBuffer.format), 320, 240, bpr);
     bitmap.setPixels(outBuffer.bits);
     SkCanvas canvas;
     SkRegion clipReg;
     const Rect b(dirtyRegion.getBounds());
     clipReg.setRect(b.left, b.top, b.right, b.bottom);
     canvas.clipRegion(clipReg);
     canvas.drawARGB(0, 0xFF, 0x00, 0xFF);
     canvas.drawCircle(200, 200, 100, paint);
     bitmap.notifyPixelsChanged();
     surface->unlockAndPost();
     sleep(3);


 /**********************************************************************************/
     SkFILEStream stream("/sdcard/test.jpg");
     SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
     if(codec){
         SkBitmap bmp;
         stream.rewind();
         codec->decode(&stream, &bmp, SkBitmap::kRGB_565_Config, SkImageDecoder::kDecodePixels_Mode);
         surface->lock(&outBuffer,NULL);
         bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
         bitmap.setConfig(convertPixelFormat(outBuffer.format), 320, 240, bpr);
         bitmap.setPixels(outBuffer.bits);
         //dev = new SkDevice(bitmap);
         //canvas.setDevice(dev);
         canvas.drawBitmap(bmp, SkIntToScalar(200), SkIntToScalar(300));
         surface->unlockAndPost();
         sleep(3);
         //delete dev;
     }

     IPCThreadState::self()->joinThreadPool();

     IPCThreadState::self()->stopProcess();

     return 0;
 }

Android.mk

 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)

 LOCAL_SRC_FILES:= \
     testsurface.cpp

 LOCAL_C_INCLUDES := \
     external/skia/include/core

 LOCAL_SHARED_LIBRARIES := \
     libcutils \
     libutils \
     libbinder \
     libui \
     libgui \
     libskia

 LOCAL_MODULE:= testsurface

 LOCAL_MODULE_TAGS := tests

 include $(BUILD_EXECUTABLE)

代码修改自http://blog.csdn.net/lxl123/article/details/21465841 他的代码在Android4.4编译会报错.