screen_vertical_scroll.c File Reference

#include "../../ugbc.h"

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Functions
void	screen_vertical_scroll (Environment *_environment, int _displacement)
	Emit ASM code for SCREEN VERTICAL SCROLL [int]x.
void	screen_vertical_scroll_var (Environment *_environment, char *_displacement)
	Emit ASM code for SCREEN VERTICAL SCROLL [expression].

Function Documentation

screen_vertical_scroll()

void screen_vertical_scroll	(	Environment *	_environment,
		int	_displacement )

Emit ASM code for SCREEN VERTICAL SCROLL [int]x.

Emit ASM code for SCREEN VERTICAL SCROLL [integer].

This function outputs an assembly code capable of performing a hardware scroll of the screen. The scroll is always in the direction from bottom to up, so with a _displacement of 0 the screen is exactly as it would be without scrolling while with the value 7 you would have a scroll of 7 pixels upwards. This version is used when a direct integer is used.

Parameters

_environment	Current calling environment
_displacement	Vertical offset in pixels (0-7)

Definition at line 53 of file screen_vertical_scroll.c.

screen_vertical_scroll_var()

void screen_vertical_scroll_var	(	Environment *	_environment,
		char *	_displacement )

Emit ASM code for SCREEN VERTICAL SCROLL [expression].

This function outputs an assembly code capable of performing a hardware scroll of the screen. The scroll is always in the direction from bottom to up, so with a _displacement of 0 the screen is exactly as it would be without scrolling while with the value 7 you would have a scroll of 7 pixels upwards. This version is used when an expression is used.

Parameters

_environment	Current calling environment
_displacement	Vertical offset in pixels (0-7)

Definition at line 71 of file screen_vertical_scroll.c.