caching bitmap

[Ezgi]

Hi,

I have a project that has multiple screens. On the first screen, there is a zoom animation. Every 10 tick, it's getting larger. How ever, it looks like that it stucks towards the end of animation. So, I decided to use caching.

void TouchGFXHAL::initialize()
{
 TouchGFXGeneratedHAL::initialize();
 uint16_t* const cacheStartAddr = (uint16_t*)0x30025800;
 const uint32_t cacheSize = 0x20000; 
	 touchgfx::Bitmap::removeCache();
 touchgfx::Bitmap::setCache(cacheStartAddr, cacheSize);
}

void IgnitionOnDemoScreenView::setupScreen()
{
 IgnitionOnDemoScreenViewBase::setupScreen();
	Bitmap::cache(BITMAP_LOGO_ORIG_60X60_ID);
	LogoImage.setBitmap(BITMAP_LOGO_ORIG_60X60_ID);
	LogoImage.setXY(90,130);
	LogoImage.setScalingAlgorithm(touchgfx::ScalableImage::BILINEAR_INTERPOLATION);
	add(LogoImage);
}
void IgnitionOnDemoScreenView::tearDownScreen()
{
 IgnitionOnDemoScreenViewBase::tearDownScreen();
		 Bitmap::clearCache();
}
 
bool IgnitionOnDemoScreenView::IgnitionOnDemoScr_Animate() {
	static uint8_t Tick = 0;
	Tick++;
	if (Tick % 10 == 0) {
		if (LogoImage.getWidth() < 225 && LogoImage.getHeight() < 225) {
			LogoImage.setPosition(LogoImage.getX() - 5, LogoImage.getY() - 5, LogoImage.getWidth() + 10, LogoImage.getHeight() + 10);
			LogoImage.invalidate();
		}
		else {
			return true;
		}
	}
	
	return false;
}

But now, the quality of image is bad and it makes the other processes get stuck.

[Alexandre RENOUX]

Hello Ezgi,

Do you have also the issue on the simulator or is it only on your board ? What board do you have ?

What do you mean by "looks like that it stucks towards the end of animation" ?

On another note, your tearDownScreen function should me modified as follows :

void IgnitionOnDemoScreenView::tearDownScreen()
{
 Bitmap::clearCache();
 IgnitionOnDemoScreenViewBase::tearDownScreen();
}

/Alexandre

[Ezgi]

Hi,

Thanks for your answer. I try it on my custom board that has STM32H743VGTX. The image disappears before the last step is left and then it comes out. Also, I have a pointer on the board. When the animation goes on, this pointer freezes sometimes and delays.