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function doNothing(something) {
    return something;
}

switch (condition)
{
  case true: return;

  default: // do something else
}

if(the_code_below_can_not_be_executed) return;
// now do what must be done

if (!condition) {
    //Do something else
}

if ( negative condition as a positive) {
   // continue.
else {
   return;
}

jpg_state js;
js.tft=&tft;
js.dma_space=dma_space;
js.size = dma_size;
io::file_stream inp("/spiffs/warhol320x240.jpg",file_mode::read);    
jpeg::convert(
    inp,
    [](const rect16& rect,size16 size,const rgb888* bitmap, const void* state){
        jpg_state s = *((jpg_state*)state);
        const rgb888* end = bitmap+(sizeof(rgb888)*rect.width()*rect.height());
        assert((((end-bitmap)/sizeof(rgb888))*sizeof(rgb565))<=s.size);
        uint16_t* buf=(uint16_t*)s.dma_space;
        while(bitmap!=end) {
            rgb565 col = color::reduce(*bitmap++);
            *(buf++)=env::platform::mkbe(col.value);
        }
        return result::success==s.tft->write(rect,s.dma_space);
    },
    &js);

Daniel Pfeffer wrote:

For example, unless there is a specific requirement for supporting JPEG images in runtime, why not convert them offline to a more amenable format?

honey the codewitch wrote:

I love coding for these little things because you're so close to the metal, but when you want to go your own way with something, because existing offerings are too heavy or limited, you have to start over from scratch.

Quote:

Pygmy Pie