如何在不离开X.11环境的情况下开发DirectFB应用程序

sudo apt-get install libdirectfb-dev

#include<directfb.h>

int main(int argc, char *argv[])
{
    IDirectFB *dfb;
    IDirectFBSurface *primary;

    DFBResult ret;

    ret = DirectFBInit(&argc, &argv);
    if (ret != DFB_OK) {
        fprintf(stderr, "DirectFBInit failed\n");
        return -1;
    }

    ret = DirectFBCreate(&dfb);
    if (ret != DFB_OK) {
        fprintf(stderr, "DirectFBCreate failed\n");
        return -1;
    }

    ret = dfb->SetCooperativeLevel(dfb, DFSCL_FULLSCREEN);
    if (ret != DFB_OK) {
        fprintf(stderr, "SetCooperativeLevel failed\n");
        dfb->Release(dfb);
        return -1;
    }

    ret = dfb->CreateSurface(dfb, &primary);
    if (ret != DFB_OK) {
        fprintf(stderr, "CreateSurface failed\n");
        dfb->Release(dfb);
        return -1;
    }

    primary->Clear(primary, 0xff, 0xff, 0xff, 0xff);
    primary->Flip(primary, NULL, 0);

    sleep(5);

    primary->Release(primary);
    dfb->Release(dfb);

    return 0;
}

CC = gcc
CFLAGS = -Wall -g
LDFLAGS = -ldirectfb

all: directfb-app

directfb-app: directfb-app.c
    $(CC) $(CFLAGS) -o directfb-app directfb-app.c $(LDFLAGS)

clean:
    rm -f directfb-app

startx