I have tried to use RGB565 format to store images, the size is too big.
Then I used L8_RGB565 format, the size is reduced by nearly half, but it didn't feel good enough.
L8_RGB565 image is divided into two pieces of data: pixels and CLUT. I think the CLUT part is perfect, but the data part can be compressed a little bit. With lossless compression such as RLE_8, the entire image size can be further reduced.
In fact, I have also done this test and it is quite practical. Doing so requires to modify the image data table, and this data table is automatically generated by TouchGFX according to the image format. Doing so destroys the original style and may introduce many new problems. So I finally gave up.
Store the JPEG image data in the SD card, import all the JPEG images new screen used and release old screen data when screen changed. Due to the need to import a large number of images when changing the screen, and also need to further processing of JPEG images into bitmap format, so display lag when screen changed. It makes me awkward to use.
Have you encountered similar problems in using it?
