pushImage with transparency

[bobwolff68]

Hey there,
I was scratching my head as to why the compiler was erroring out on my code. I was staring at the TFT prototype:

void TFT_eSPI::pushImage(int32_t x, int32_t y, int32_t w, int32_t h, const uint16_t *data, uint16_t transp)

And then I realized I was trying to use a Sprite object and came to learn that the pushImage() function isn't supported inside of Sprites WITH transparency (and with PROGMEM/const data pref).

Is there a reason for this missing item other than it just hasn't been implemented?

Or is there some other obvious way that I can push a 16-bit color image into a Sprite area where there is a pixel value that should be transparent?

--robobob

[Bodmer]

Yes, not all possible permutations have been implemented.

You can push a sprite to another sprite with transparency.

[renaudbarbier]

by the way, pushing a cropped image (pushimage) with transparency to the tft would be great feature...

[Bodmer]

Pushing a cropped image can be achieved by using the TFT setViewport function.

[renaudbarbier]

I meant cropped with TRANSPARENCY.

[renaudbarbier]

@Bodmer could you please share an example on how to push a sprite to an other sprite with transparency? I saw the function: bool TFT_eSprite::pushToSprite(TFT_eSprite *dspr, int32_t x, int32_t y, uint16_t transp)

but did not managed to make it work. it seems the way I declare the destination sprite is not ok. (I just typed the sprite name in there)

what about this?

[Bodmer]

Example:
spr.pushToSprite(&dspr, x, y, TFT_BLACK);