ips_artifact_fixer

main.c

#include <stdio.h>
#include <3ds.h>


#define REVERSE_INTERVAL  (60u * 15)



static void setLcdFill(const u32 val)
{
	// This relies on Luma's special memory mapping.
	*((vu32*)(1u<<31 | 0x10202204)) = val; // Top.
	*((vu32*)(1u<<31 | 0x10202A04)) = val; // Bottom.
}

// Note: This basically works by causing more "burn in" on the whole screen to
//       hide the original artifacts. This will not remove all artifacts.
int main(int argc, char* argv[])
{
	gfxInitDefault();
	consoleInit(GFX_TOP, NULL);

	puts("IPS artifact fixer\n\n"
	     "\x1b[31mEpilepsy warning:\x1b[0m\n"
	     "This will cause visible flickering. Use at your own risk!\n\n"
	     "Usage:\n"
	     "Press A to start/stop. START to exit. Let this run for 5-10 minutes.");

	u32 fillReg = 0;
	u32 frameCounter = 0;
	while(aptMainLoop())
	{
		gspWaitForVBlank();
		setLcdFill(fillReg);
		gfxSwapBuffers();

		hidScanInput();
		u32 kDown = hidKeysDown();
		if(kDown & KEY_A) fillReg ^= 1u<<24;
		if(kDown & KEY_START) break;

		if((frameCounter % REVERSE_INTERVAL) != 0) fillReg ^= 0xFFFFFFu;
		frameCounter++;
	}

	setLcdFill(0); // Turn it off before exiting.

	gfxExit();
	return 0;
}