How to convert images to C array ?

[tavdog]

I've been trying everything and I can't get proper colors. The color is always shifted one way or the other. see photo. Is there a walkthrough somehwhere on how to do this ? The tool in the TFT_eSPI doesn't work. I can get recognisable images by exporting from GIMP as PNG and using img2cpp utility to create the C-array, but the colors are never correct.

[tavdog]

I have tried the instruction in this repo but no matter what Blue and Red are swapped.

[teastainGit]

It looks exactly like a tft.setSwapBytes(true); issue, where the two colour bytes are swapped, Big Endian-Little Endian issue, where Ox00FF is transposed to 0xFF00

[mmMicky]

Method 1: tft.setSwapBytes(true); Method 2: Use the mouse to drag the blue and red to exchange

[tavdog]

Wow, thank you for the solution. Dragging the Red block over to the blue fixed the issue. But It never worked when I tried modifying swapBytes(true); Why would setting swapBytes(false) not work, but dragging the little color swatch would ?

[tavdog]

The other solution that works is changing the following options in the user setup for tft_espi // #define TFT_RGB_ORDER TFT_RGB // Colour order Red-Green-Blue

define TFT_RGB_ORDER TFT_BGR // Colour order Blue-Green-Red

[mmMicky]

swapBytes() is to modify the order of sending. For example, the normal transmission is from bit7->bit6->....->bit0. After enabling, the order is reversed even if bit0->bit1->..bit7