主要流程

FY_MPI_VO_GetVideoLayerAttr(SAMPLE_VO_LAYER_VHD0, &stLayerAttr)获取视频层信息

FY_MPI_SYS_MmzAlloc(&(g_stBackGround.u32PhyAddr), ((void**)&g_pu8BackGroundVir), “ui_bg”, NULL, BACKGROUNGD_WIDTHBACKGROUNGD_HEIGHTbyteDep)申请MMZ缓存

ioctl(fd, FBIOPUT_SHOW_FYFB, &bShow)关闭显示

ioctl(fd, FBIOPUT_COMPRESSION_FYFB, &bCompress)关闭图片压缩功能

ioctl(fd, FBIOGET_VSCREENINFO, &var)获取屏幕信息

ioctl(fd, FBIOPUT_VSCREENINFO, &var)设置屏幕属性

ioctl(fd, FBIOGET_FSCREENINFO, &fix)获取屏幕起始帧缓冲内存物理地址

ioctl(fd, FBIOPUT_SHOW_FYFB, &bShow)使能设备开启显示

mmap(NULL, stFixInfo.smem_len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)//内存映射

ioctl(fd, FBIOPUT_ALPHA_FYFB, &stAlpha)//设置叠加层的不透明度

FY_TDE2_Open()//打开TDE设备

TDE_CreateSurfaceFromFile(pszBgNames[i++], &g_stBackGround, g_pu8BackGroundVir)//读取bmp图片数据

TDE_DrawUiBySize//开始渲染bmp图片

代码

s32Ret = FY_MPI_VO_GetVideoLayerAttr(SAMPLE_VO_LAYER_VHD0, &stLayerAttr);
if(s32Ret)
{
    
    printf("failed to get vo layer(%d) info!\n", SAMPLE_VO_LAYER_VHD0);
    return FY_NULL;
}

fd = open("/dev/fb0", O_RDWR, 0);
if(fd < 0)
{
    
    printf("open /dev/fb0 failed!\n");
    return FY_NULL;
}
bComSupport = FY_TRUE;
prctl(PR_SET_NAME, "UI_HD");

screanWidth = stLayerAttr.stImageSize.u32Width;
screanHeight = stLayerAttr.stImageSize.u32Height;
//在用户态申请 MMZ 内存。。
if (FY_FAILURE == FY_MPI_SYS_MmzAlloc(&(g_stBackGround.u32PhyAddr), ((void**)&g_pu8BackGroundVir), "ui_bg", NULL, BACKGROUNGD_WIDTH*BACKGROUNGD_HEIGHT*byteDep))
{
    
    printf("allocate memory 0 (%d bytes) failed\n", BACKGROUNGD_WIDTH*BACKGROUNGD_HEIGHT*byteDep);
    goto exitFb;
}
//把缓存置零清除一下数据
memset(g_pu8BackGroundVir, 0x00, BACKGROUNGD_WIDTH*BACKGROUNGD_HEIGHT*byteDep);

bShow = FY_FALSE;
if (ioctl(fd, FBIOPUT_SHOW_FYFB, &bShow) < 0)
{
    
	SAMPLE_PRT("FBIOPUT_SHOW_FYFB failed!\n");
    goto exitMmz;
}

if(bComSupport){
    
    bCompress = FY_FALSE;
    if (ioctl(fd, FBIOPUT_COMPRESSION_FYFB, &bCompress) < 0)//是否启动图层压缩功能
    {
    
        printf(" FBIOPUT_COMPRESSION_FYFB failed!\n");
        goto exitMap;
    }
}

/* get the variable screen info */
if (ioctl(fd, FBIOGET_VSCREENINFO, &stVarInfo) < 0)
{
    
    printf("Get variable screen info failed!\n");
    goto exitMmz;
}

stVarInfo.xres_virtual	 	= ALIGN_UP(screanWidth, 8);//虚拟屏幕一行有多少个像素点
stVarInfo.yres_virtual		= screanHeight;//虚拟屏幕一列有多少个像素点
stVarInfo.xres      		= ALIGN_UP(screanWidth, 8);//定义屏幕一行有多少个像素点
stVarInfo.yres      		= screanHeight;//定义屏幕一列有多少个像素点
stVarInfo.activate  		= FB_ACTIVATE_NOW;
stVarInfo.bits_per_pixel	= bitDep; //每个像素多少字节
stVarInfo.xoffset = 0;
stVarInfo.yoffset = 0;
stVarInfo.red   = s_red;
stVarInfo.green = s_gre;
stVarInfo.blue  = s_blu;
stVarInfo.transp = s_alp;

if (ioctl(fd, FBIOPUT_VSCREENINFO, &stVarInfo) < 0)
{
    
    printf("process frame buffer device error\n");
    goto exitMmz;
}

if (ioctl(fd, FBIOGET_FSCREENINFO, &stFixInfo) < 0)
{
    
    printf("process frame buffer device error\n");
    goto exitMmz;
}
//获取fb缓冲内存的开始地址（物理地址）
u32PhyAddr  = stFixInfo.smem_start;

//用mmap映射出fb缓存的虚拟地址
//smem_len----fb缓冲的长度
pShowScreen   = mmap(NULL, stFixInfo.smem_len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (NULL == pShowScreen)
{
    
    printf("mmap fb0 failed!\n");
    goto exitMmz;
}
memset(pShowScreen, 0x00, stFixInfo.smem_len);//清理fb缓存、因为物理地址不能直接操作需要mmap一下

g_stScreen.enColorFmt = COLOR_FORMAT;//颜色的格式 这里是RGB1555
g_stScreen.u32PhyAddr = u32PhyAddr;//fb缓冲内存的开始地址（物理地址）
g_stScreen.u32Width = screanWidth;//位图宽度
g_stScreen.u32Height = screanHeight;//位图高度
g_stScreen.u32Stride = stFixInfo.line_length;//一行的字节长度
g_stScreen.bAlphaMax255 = FY_TRUE;//不透明度
g_stScreen.bAlphaExt1555 = FY_TRUE;//不透明度
g_stScreen.u8Alpha0 = 0;//不透明度
g_stScreen.u8Alpha1 = 255;//不透明度

bShow = FY_TRUE;
if (ioctl(fd, FBIOPUT_SHOW_FYFB, &bShow) < 0)
{
    
    printf("FBIOPUT_SHOW_FYFB failed!\n");
    goto exitMap;
}

stAlpha.bAlphaChannel = FY_TRUE;
stAlpha.bAlphaEnable = FY_TRUE;
stAlpha.u8Alpha0 = 0;
stAlpha.u8Alpha1 = 255;
stAlpha.u8GlobalAlpha = 128;
if (ioctl(fd, FBIOPUT_ALPHA_FYFB, &stAlpha) < 0)
{
    
    printf("Put alpha info failed!\n");
    goto exitMap;
}
//打开 TDE 设备
s32Ret = FY_TDE2_Open();
if(s32Ret)
{
    
    printf("Open tde failed!\n");
    ui_state = FY_FAILURE;
    goto exitMap;
}

if(ui_mode == 0){
    
    num_color = (FY_S32)((sizeof (pszBgNames) / sizeof (pszBgNames[0])));
}else{
    
    num_color = 1;
    pszBgNames[0] = pColorNames;
    printf("UI open file named %s\n", pszBgNames[0]);
}

i = 0;

TDE_CreateSurfaceFromFile(pszBgNames[i++], &g_stBackGround, g_pu8BackGroundVir);
//设置g_stBackGround 图片的宽高还有1像素所占的字节
//把图片数据读到g_pu8BackGroundVir MMZ虚拟地址上
if(i > num_color - 1)
    i = 0;

//g_stScreen有fb缓冲内存的开始地址（物理地址）
//g_stBackGround有mmz的物理地址
s32Ret = TDE_DrawUiBySize(fd, &g_stScreen, &g_stBackGround, 0, &stVarInfo);
if(s32Ret)
    printf("draw globle UI failed!\n");

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