Display by SurfaceComposerClient

黑石猴子

于 2017-07-05 10:58:19 发布

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本文链接：https://blog.csdn.net/ckbulesky/article/details/74389368

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本文档展示了如何通过SurfaceComposerClient获取DisplayStatInfo，并创建SurfaceControl进行图形数据操作。主要涉及SurfaceFlinger服务、显示宽度和高度的获取、Surface层次设置以及缓冲区配置。

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

#include <android/native_window.h>
#include <gui/Surface.h>
#include <gui/SurfaceComposerClient.h>
#include <gui/ISurfaceComposer.h>
#include <ui/DisplayStatInfo.h>

int main (int argc, char *argv[]) {

    long tOSDWidth = 0;
    long tOSDHeight = 0;

    sp<IServiceManager> sm = defaultServiceManager();
    sp<ISurfaceComposer> composer = interface_cast<ISurfaceComposer>(sm->checkService(String16("SurfaceFlinger")));
    //FIXME
    tOSDWidth = 1920;
    tOSDHeight = 1080;

    if (composer != NULL){
        DisplayStatInfo stats;
        status_t res = composer->getDisplayStats(NULL , &stats);

        if (res == NO_ERROR){
            ALOGI("OSD width=%d height=%d", stats.displayWidth, stats.displayHeight);