近期在研究Android的surface系统，写了个小demo，编译的时候。一直报错，说是缺少.o文件，可是看代码一直没问题。后来发现原来是在window下编写的，然后在linux编译的时候，后缀多了^M。所以导致编译只是。
事实上提示类似的错误。肯定是代码那块地方出现了类似的错误。不知道的，查起来能累死，知道的非常快的就能知道怎么查。
顺便把源代码贴写。
testsurface.cpp
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <cutils/memory.h>
#include<native_window.h>
#include <utils/Log.h>
#include <binder/IPCThreadState.h>
#include <binder/ProcessState.h>
#include <binder/IServiceManager.h>
#include <ui/GraphicBuffer.h>
#include <gui/Surface.h>
#include <gui/ISurfaceComposer.h>
#include <gui/SurfaceComposerClient.h>
#include <cutils/properties.h>
#include <ui/DisplayInfo.h>
using namespace android;
int main(int argv,char *argc[])
{
sp<ProcessState> proc(ProcessState::self());
ProcessState::self()->startThreadPool();
sp<SurfaceComposerClient> client = new SurfaceComposerClient();
sp<SurfaceControl> surfaceControl = client->createSurface(String8("testsurface"),240, 160, PIXEL_FORMAT_RGBX_8888, 0);
DisplayInfo dinfo;
sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(
ISurfaceComposer::eDisplayIdMain);
SurfaceComposerClient::getDisplayInfo(display, &dinfo);
uint32_t dispw = dinfo.w;
uint32_t disph = dinfo.h;
/* create backgound surface */
sp<SurfaceControl> bg_surfaceControl = client->createSurface(
String8("test-bg-surface"), dispw, disph, PIXEL_FORMAT_RGBX_8888);
sp<Surface> bg_surface = bg_surfaceControl->getSurface();
/* set background layer z-order */
SurfaceComposerClient::openGlobalTransaction();
bg_surfaceControl->setLayer(200000);
SurfaceComposerClient::closeGlobalTransaction();
/* clear background layer black */
ANativeWindow_Buffer outBuffer;
bg_surface->lock(&outBuffer, NULL);
ssize_t bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
android_memset32((uint32_t*)outBuffer.bits, 0xFF000000, bpr * outBuffer.height);
bg_surface->unlockAndPost();
sleep(5);
bg_surface->lock(&outBuffer, NULL);
bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
android_memset32((uint32_t*)outBuffer.bits, 0xF800, bpr * outBuffer.height);
bg_surface->unlockAndPost();
sleep(5);
bg_surface->lock(&outBuffer, NULL);
bpr = outBuffer.stride * bytesPerPixel(outBuffer.format);
android_memset32((uint32_t*)outBuffer.bits, 0x7e56, bpr * outBuffer.height);
bg_surface->unlockAndPost();
sleep(5);
return 0;
}
Android.mk
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= testsurface.cpp
LOCAL_C_INCLUDES := external/skia/include/core \
frameworks/native/include/android
LOCAL_SHARED_LIBRARIES := libcutils \
libutils \
libbinder \
libui \
libgui \
LOCAL_MODULE:= testsurface
LOCAL_MODULE_TAGS := tests
include $(BUILD_EXECUTABLE)
