Inverting colors

[moredatalesscenter]

Hello, I have a 1bpp display and would like to invert the colors on all screens programatically. I've tried in

a) getColorFrom24BitRGB(uint8_t red, uint8_t green, uint8_t blue) by XORing with 1, which is ok except for bitmaps

b) TouchGFXHAL::flushFrameBuffer(const touchgfx::Rect& rect) by locking the framebuffer and XORing each word with 0xFFFFFFFF, which is ok on invalidated rect, but flickers on the remainder of the screen.

[moredatalesscenter]

Is this possible?

[MM..1]

Simpler way is use display registers setup to inverted mode, then no next code changes.

[moredatalesscenter]

Unfortunately the device doesn't have this capability

[MM..1]

Make two screens one positive one negative and switch between when your display controller IC dont have invert mode

[moredatalesscenter]

Not practical - I have hundreds of screens.

[MM..1]

Then you need display with invert function, that is practical, or virtual buffers mean touchgfx uses positive buffers and ltdc negative with double buffering.

Example command on LCD

void ili9341_Initnoinvert(void)

{

 LCD_IO_Init();

 ili9341_WriteReg(0x21);//Display Inversion Off

}

void ili9341_Initinvert(void)

{

 LCD_IO_Init();

 ili9341_WriteReg(0x20);//Display Inversion On

}