BRT Community

Please login or register.

Login with username, password and session length
Advanced search  

News:

Welcome to the Bridgetek Community!

Please read our Welcome Note

Technical Support enquires
please contact the team
@ Bridgetek Support

Please refer to our website for detailed information on all our products - Bridgetek - Bridging Technology

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - pauljiao

Pages: 1 2 3 [4]
46
"cmd_loadimage" decodes PNG into various image formats based on the PNG image properties.  It might be in
Paletted4444, or L8 or RGB565.   So user may need use cmd_getprops to retrieve the decoded size to calculate the next available address.

To use cmd_getprops, please see the example in "cmd_regread". It is common practice to read the output parameter from EVE coprocessor buffer.

47
Discussion - EVE / Re: EVE Image Converter and Alpha-Channel
« on: June 06, 2019, 04:48:47 AM »
Hi Rudolph,

    I searched the website and found Riverdi provides that 7inch display panel ,which might be what you want.  see:
https://riverdi.com/product-category/eve/?filter_graphics-controller=bt81x-eve-3&filter_size-inch=7&query_type_size-inch=or


48
It is open source and works perfectly on latest BT81X, check it out:

https://github.com/kaetemi/nuklear_eve

49
Discussion - EVE / Re: EVE Image Converter and Alpha-Channel
« on: June 03, 2019, 09:18:13 AM »
Hi Rudolph,
     For EVE bitmap format,  the alpha channel is kept in the following formats, ARGB1555, PALETTED, ARGB4, ARGB2 and ASTC(BT81X).   If you want to keep the alpha channel, you may try EAB to convert it into the formats above.   ASTC4x4 shall be good enough for you.

     Best Regards
      Paul J

50
Discussion - EVE / Re: BT81x CustomFont using unicode
« on: April 12, 2019, 07:24:27 AM »
It may be caused by bitmap limitation of ASTC format in flash. ASTC bitmaps in flash must be 64-bytes aligned. In particular , fonts in flash must use a multiple of four ASTC blocks per character.   So the suggestion is to load the glyph into RAM_G and change the offset 32(start_of_graphics_data) of xfont to the glyph address of RAM_G. The glyph in RAM_G has no such limitation and it shall work.

51
Quote
But that does not happen when I do build and update to hardware in eve screen designer 4.5 beta 2.
   do you mean upload the .exe file into the ME813AU board? 
If you want to work with FT90X platform, beside building in ESD,  you need a SD card to store all the EVE assets, such as the converted image data.  All the assets shall be at root directory of SD card.

52
Discussion - EVE / Re: BT81x and VERTEX2F
« on: January 31, 2019, 09:29:48 AM »
Quote
There are 21 reserved bits in VERTEX_FORMAT.
Bit 3 could have been used to change the format of VERTEX2F:
Bit 0...13 = Y
Bit 16...29 = X

With 1 bit less in resolution as a trade-off the frac-value of 0 would be -8192 to 8191, same as 1 and so the maximum pixel precision would be 1/8 pixel.

I think your idea shall be Bit 2 (starting from Bit 0) ,i.e. the THIRD bit, other than bit 3 is used in VERTEX_FORMAT.
But I do not know what benefit it may bring to you.

53
please try to put the image data into the SAME folder with the project binary ,for example "myProject.exe". 

Pages: 1 2 3 [4]