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sumotoy / RA8875

A library for RAiO RA8875 display driver for Teensy3.x or LC/Arduino's/Energia/Spark
GNU General Public License v3.0
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Image rotation in RA8875 #143

Open mikey06355 opened 5 years ago

mikey06355 commented 5 years ago

Using the example load24bitImages if I set rotation to a 1 or 3 (portrait mode) the image will not display. I am using an Adafruit 5" tft and a Teensy 3.2. Text rotate fine. Thanks...Mike

KurtE commented 4 years ago

For what it is worth, I found that I had the same issue. Simply trying to draw an image I had stored in an array.

The issue is with the function drawPixels, that does not work properly in portrait mode. I believe this is because the underlying stuff is simply swapping the usage of what is horizontal and what is vertical...

I talk more about it in the Teensy forum thread: https://forum.pjrc.com/threads/57280-RA8875-from-Buydisplay?p=214506&viewfull=1#post214506

KurtE commented 4 years ago

@mikey06355 and @sumotoy (if you are at listening)...

A couple of us have been doing some work to make this driver work on the newer Teensy boards, in particular T4. We have a good working version up at: https://github.com/mjs513/RA8875/tree/RA8875_t4

One of the last things I added in our version is a function that is in some of our other drivers. 

writeRect(int16_t x, int16_t y, int16_t w, int16_t h, const uint16_t *pcolors)

This function fills a rectangle on the screen with the bitmap data pointed to by pcolors. If in portrait mode, it will call drawPixels with a temporary buffer, where it will grab the pixels from the opposite direction... in order to get it right on the display...

More details up in the thread: https://forum.pjrc.com/threads/57280-RA8875-from-Buydisplay?p=228071&viewfull=1#post228071