Product Application

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Rev.1.1
2.2 Setting background color and text formatting
In this example the method for setting the background color and text drawing is presented. You will
see a red string with the name of the sub-application in the middle of the white screen. Result is
presented in
Figure 2.
Figure 2. Text formatting and background color example
In the
Figure 2 you can see effect of following code:
Ft_Gpu_CoCmd_Dlstart(phost);
/*Setting first screen*/
Ft_App_WrCoCmd_Buffer(phost,CLEAR_COLOR_RGB(0xff,0xff,0xff));//white color
Ft_App_WrCoCmd_Buffer(phost,CLEAR(1,1,1));//clear screen
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(0x80,0x00,0x00));//red color
Ft_Gpu_CoCmd_Text(phost,(FT_DispWidth/2), FT_DispHeight/2, 28, OPT_CENTERX,
"Riverdi 4.3\" CTP demo");
Ft_App_WrCoCmd_Buffer(phost,DISPLAY());
Ft_Gpu_CoCmd_Swap(phost);
/* Download the commands into fifo */
Ft_App_Flush_Co_Buffer(phost);
/* Wait till coprocessor completes the operation */
Ft_Gpu_Hal_WaitCmdfifo_empty(phost);
You can set background color using macro CLEAR_COLOR_RGB and CLEAR, which setting each of red,
blue and green component separately.
You can set color of next graphic objects using macro COLOR_RGB. Using function
Ft_Gpu_CoCmd_Dlstart(phost) you start display list which will be send to FT800. Using
Ft_Gpu_CoCmd_Text(phost,x,y,font,options,string) function you can display text at
location (x,y). The font size and type is setting by font parameter(0 – 31), it can be one of embedded
font or you can define your own fonts (see ROM and RAM Fonts). The options is responsible for
additional options: By default (x,y) is the top-left pixel of the text and the value of options is zero.