Android用C++创建surface显示RGB数据

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

[cpp] view plain copy

 

1. #include <cutils/memory.h>  
2.   
3. #include <unistd.h>  
4. #include <utils/Log.h>  
5.   
6. #include <binder/IPCThreadState.h>  
7. #include <binder/ProcessState.h>  
8. #include <binder/IServiceManager.h>  
9.   
10. #include <gui/Surface.h>  
11. #include <gui/SurfaceComposerClient.h>  
12. #include <gui/ISurfaceComposer.h>  
13. #include <ui/DisplayInfo.h>  
14. #include <ui/Rect.h>  
15. #include <ui/Region.h>  
16. #include <android/native_window.h>  
17. #include <SkGraphics.h>  
18. #include <SkBitmap.h>  
19. #include <SkCanvas.h>  
20. #include <SkDevice.h>  
21. #include <SkStream.h>  
22. #include <SkImageDecoder.h>  
23.   
24. #include <hardware/hwcomposer_defs.h>  
25. using namespace android;  
26.   
27. static inline SkBitmap::Config convertPixelFormat(PixelFormat format) {  
28.     /* note: if PIXEL_FORMAT_RGBX_8888 means that all alpha bytes are 0xFF, then 
29.         we can map to SkBitmap::kARGB_8888_Config, and optionally call 
30.         bitmap.setIsOpaque(true) on the resulting SkBitmap (as an accelerator) 
31.     */  
32.     switch (format) {  
33.     case PIXEL_FORMAT_RGBX_8888:    return SkBitmap::kARGB_8888_Config;  
34.     case PIXEL_FORMAT_RGBA_8888:    return SkBitmap::kARGB_8888_Config;  
35.     case PIXEL_FORMAT_RGB_565:      return SkBitmap::kRGB_565_Config;  
36.     default:                        return SkBitmap::kNo_Config;  
37.     }  
38. }  
39.   
40. int main(int argc, char** argv)  
41. {  
42.     // set up the thread-pool  
43.     sp<ProcessState> proc(ProcessState::self());  
44.     ProcessState::self()->startThreadPool();  
45.   
46.     // create a client to surfaceflinger  
47.     sp<SurfaceComposerClient> client = new SurfaceComposerClient();  
48.     //DisplayoutBuffer display;  
49.     //client->getDisplayoutBuffer(client->getBuiltInDisplay(HWC_DISPLAY_PRIMARY), &display);  
50.     sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(  
51.             ISurfaceComposer::eDisplayIdMain));  
52.     DisplayInfo dinfo;  
53.     //获取屏幕的宽高等信息  
54.     status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);  
55.     printf("w=%d,h=%d,xdpi=%f,ydpi=%f,fps=%f,ds=%f\n",   
56.         dinfo.w, dinfo.h, dinfo.xdpi, dinfo.ydpi, dinfo.fps, dinfo.density);  
57.     if (status)  
58.         return -1;  
59.     sp<SurfaceControl> surfaceControl = client->createSurface(String8("testsurface"),  
60.             dinfo.w, dinfo.h, PIXEL_FORMAT_RGB_565, 0);  
61.   
62. /****************************第一张图******************************************************/  
63.     SurfaceComposerClient::openGlobalTransaction();  
64.     surfaceControl->setLayer(100000);//设定Z坐标  
65.     surfaceControl->setPosition(0, 0);//以左上角为(0,0)设定显示位置  
66.     SurfaceComposerClient::closeGlobalTransaction();  
67.     surfaceControl->show();//感觉没有这步,图片也能显示  
68.     sp<Surface> surface = surfaceControl->getSurface();  
69.   
70.     ANativeWindow_Buffer outBuffer;  
71.     //Surface::SurfaceoutBuffer outBuffer;  
72.     surface->lock(&outBuffer,NULL);//获取surface缓冲区的地址  
73.     ssize_t bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);  
74.     android_memset16((uint16_t*)outBuffer.bits, 0xF800, bpr*outBuffer.height);//往surface缓冲区塞要显示的RGB内容  
75.     surface->unlockAndPost();  
76.     sleep(3);  
77.   
78. //从文件中获取RGB数据显示 下载地址：http://kc.cc/WeVp  
79. /****************************第二张图******************************************************/  
80.     SurfaceComposerClient::openGlobalTransaction();  
81.     surfaceControl->setSize(480, 272);  
82.     surfaceControl->setPosition(100, 100);  
83.     SurfaceComposerClient::closeGlobalTransaction();  
84.     surfaceControl->show();//感觉没有这步，图片也能显示  
85.       
86.     FILE *fp = fopen("/tmp/rgb565.rgb","rb");//我们从一个文件里获取RGB565图像数据 480*272  
87.     if(fp != NULL){  
88.         unsigned char *rgb565Data = new unsigned char[480*272*2];  
89.         memset(rgb565Data,0x00,480*272*2);  
90.         fread(rgb565Data,1,480*272*2,fp);  
91.         surface->lock(&outBuffer,NULL);  
92.         //bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);  
93.         //android_memset16((uint16_t*)outBuffer.bits, 0x04E0, bpr*outBuffer.height);  
94.         memcpy(outBuffer.bits,rgb565Data,480*272*2);  
95.         delete[] rgb565Data;  
96.         surface->unlockAndPost();  
97.     }  
98.     fclose(fp);  
99.     sleep(3);  
100.   
101. //用skia画图  
102. /*******************************第三张图***************************************************/  
103.     SurfaceComposerClient::openGlobalTransaction();  
104.     surfaceControl->setSize(320, 420);  
105.     surfaceControl->setPosition(100, 100);  
106.     SurfaceComposerClient::closeGlobalTransaction();  
107.     surfaceControl->show();//感觉没有这部图片也能显示  
108.       
109.     SkPaint paint;  
110.     paint.setColor(SK_ColorBLUE);  
111.     Rect rect(0, 0, 320, 240);  
112.     Region dirtyRegion(rect);  
113.       
114.     surface->lock(&outBuffer, &rect);  
115.     bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);  
116. //    printf("w=%d,h=%d,bpr=%d,fmt=%d,bits=%p\n", outBuffer.w, outBuffer.h, bpr, outBuffer.format, outBuffer.bits);  
117.     SkBitmap bitmap;  
118.     bitmap.setConfig(convertPixelFormat(outBuffer.format), 320, 240, bpr);  
119.     bitmap.setPixels(outBuffer.bits);  
120.     SkCanvas canvas;  
121.     SkRegion clipReg;  
122.     const Rect b(dirtyRegion.getBounds());  
123.     clipReg.setRect(b.left, b.top, b.right, b.bottom);  
124.     canvas.clipRegion(clipReg);  
125.     canvas.drawARGB(0, 0xFF, 0x00, 0xFF);  
126.     canvas.drawCircle(200, 200, 100, paint);  
127.     bitmap.notifyPixelsChanged();  
128.     surface->unlockAndPost();  
129.     sleep(3);  
130.    
131.   
132. /**********************************************************************************/  
133.     SkFILEStream stream("/sdcard/test.jpg");  
134.     SkImageDecoder* codec = SkImageDecoder::Factory(&stream);  
135.     if(codec){  
136.         SkBitmap bmp;  
137.         stream.rewind();  
138.         codec->decode(&stream, &bmp, SkBitmap::kRGB_565_Config, SkImageDecoder::kDecodePixels_Mode);  
139.         surface->lock(&outBuffer,NULL);  
140.         bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);  
141.         bitmap.setConfig(convertPixelFormat(outBuffer.format), 320, 240, bpr);  
142.         bitmap.setPixels(outBuffer.bits);  
143.         //dev = new SkDevice(bitmap);  
144.         //canvas.setDevice(dev);  
145.         canvas.drawBitmap(bmp, SkIntToScalar(200), SkIntToScalar(300));  
146.         surface->unlockAndPost();  
147.         sleep(3);  
148.         //delete dev;  
149.     }  
150.       
151.     IPCThreadState::self()->joinThreadPool();  
152.       
153.     IPCThreadState::self()->stopProcess();  
154.   
155.     return 0;  
156. }  

Android.mk

[plain] view plain copy

 

1. LOCAL_PATH:= $(call my-dir)  
2. include $(CLEAR_VARS)  
3.   
4. LOCAL_SRC_FILES:= \  
5.     testsurface.cpp  
6.   
7. LOCAL_C_INCLUDES := \  
8.     external/skia/include/core  
9.   
10. LOCAL_SHARED_LIBRARIES := \  
11.     libcutils \  
12.     libutils \  
13.     libbinder \  
14.     libui \  
15.     libgui \  
16.     libskia  
17.   
18. LOCAL_MODULE:= testsurface  
19.   
20. LOCAL_MODULE_TAGS := tests  
21.   
22. 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.