Hi Denis, The actual use case is subtitle rendering. The subtitle kernel space driver gives some default entries for Palette which I am using to set for this surface. In fact, there is some real issue with the driver where the timer function(show/hide) was so quick that I was unable to see any display on screen. This made me to think that there was some issue with DirectFB.
However, I still have few questions. a. The surface created for UTF8 to CLUT8 is an off-screen surface, however, if I use the DrawString directly on the ARGB (on-screen) surface, I am not required to set the Palette entries. Why? b. When I Lock this off-screen surface after DrawString has finished performing UTF8 to CLUT8 conversion, then I can see that DirectFB goes on to check if the buffer is allocated with DSLF_READ or DSPLF_WRITE and finally goes ahead with allocation of new memory. So, I can say that buffer allocated by DrawString doesn't set READ or WRITE flag for this surface buffer. So, that made me think that I cannot read the CLUT8 data. Why does it go for new allocation? c. When I read this off-screen surface, I only get 0x0 data; my expectation was to see 0xFF in between. d. Finally, later on blitting this data, I can see the actual subtitle. With the observations from above I am confused. :0( It's not quite long when I started working on Graphics, so, some of the questions regarding DirectFB seems naïve but will be happy get the answers to build upon. :) Thanks and regards, Divneil -----Original Message----- From: directfb-users-boun...@directfb.org [mailto:directfb-users-boun...@directfb.org] On Behalf Of Denis Oliver Kropp Sent: Thursday, November 24, 2011 2:12 AM To: directfb-users@directfb.org Subject: Re: [directfb-users] Conversion from UTF8 text to CLUT8 On 11/23/11 06:46, Divneil Rai WADHAWAN wrote: > Hi, > > > > I am working on DirectFB-1.4.12 API set. > > My requirement is to convert UTF-8 text to CLUT8 data. > > > > So, for this I did the following steps: > > a. Created a surface with pixelformat DSPF_LUT8 > > b. Set the Font for this surface. > > c. Set the Color with values 0,0,0,0xFF (ARGB) for this surface Does your palette contain this opaque black? -- Best regards, Denis Oliver Kropp .------------------------------------------. | DirectFB - Hardware accelerated graphics | | http://www.directfb.org/ | "------------------------------------------" _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
