line clipping to avoid screen overflow

[RodrigoDornelles]

loops and float points are expensive, and I don't have enough geometry knowledge to do this without copying and pasting something ready, it would be interesting to have a method that wasn't so precise but was as fast as possible for the GBA's CPU.

• function geoclip_line in src/geoclip.c

core-native-gba/src/geoclip.c

Lines 42 to 54 in 026a74e

	/**
	* @todo use cohen, liang-barsky, clipping de retA, cos, ou another method do clip drop line.
	* @brief adjusts a line within the screen
	* @param [in,out] x1
	* @param [in,out] y1
	* @param [in,out] x2
	* @param [in,out] y2
	* @return fits on the screen
	*/
	uint8_t geoclip_line(int32_t *x1, int32_t *y1, int32_t *x2, int32_t *y2)
	{
	return 1;
	}