tonc_schr4c.c File Reference

#include "tonc_surface.h"
#include "tonc_video.h"
#include "tonc_math.h"

Macros
#define	BLIT_CLIP(_ax, _aw, _w, _bx)

Functions
INLINE u32	chr4_lmask (uint left)
	Returns the clear-mask for the left side of a fill rect.
INLINE u32	chr4_rmask (uint right)
	Returns the clear-mask for the right side of a fill rect.
INLINE void	chr4c_plot (int x, int y, u32 clr, void *dstBase, u32 dstP)
INLINE void	chr4c_colset (u32 *dstD, uint left, uint right, uint height, u32 clr)
	Fill a rectangle inside a simple tile-column.
void	schr4c_floodfill_internal (const TSurface *dst, int x, int y, u32 clrNew, u32 clrOld)
	Internal routine for floodfill.
void	schr4c_prep_map (const TSurface *srf, u16 *map, u16 se0)
	Prepare a screen-entry map for use with chr4.
u32 *	schr4c_get_ptr (const TSurface *srf, int x, int y)
	Special pointer getter for chr4: start of in-tile line.
u32	schr4c_get_pixel (const TSurface *src, int x, int y)
	Get the pixel value of src at (x, y).
void	schr4c_plot (const TSurface *dst, int x, int y, u32 clr)
	Plot a single pixel on a 4bpp tiled surface.
void	schr4c_hline (const TSurface *dst, int x1, int y, int x2, u32 clr)
	Draw a horizontal line on a 4bpp tiled surface.
void	schr4c_vline (const TSurface *dst, int x, int y1, int y2, u32 clr)
	Draw a vertical line on a 4bpp tiled surface.
void	schr4c_line (const TSurface *dst, int x1, int y1, int x2, int y2, u32 clr)
	Draw a line on a 4bpp tiled surface.
void	schr4c_rect (const TSurface *dst, int left, int top, int right, int bottom, u32 clr)
	Render a rectangle on a 4bpp tiled canvas.
void	schr4c_frame (const TSurface *dst, int left, int top, int right, int bottom, u32 clr)
	Draw a rectangle on a 4bpp tiled surface.
void	schr4c_blit (const TSurface *dst, int dstX, int dstY, uint width, uint height, const TSurface *src, int srcX, int srcY)
	Blitter for 4bpp tiled surfaces. Copies a rectangle from one surface to another.
void	schr4c_floodfill (const TSurface *dst, int x, int y, u32 clr)
	Floodfill an area of the same color with new color clr.

Variables
const TSurfaceProcTab	chr4c_tab

Detailed Description

Author

J Vijn

Date

20080427 - 20080503

Todo:

Code consistency.

Macro Definition Documentation

BLIT_CLIP

#define BLIT_CLIP	(		_ax,
			_aw,
			_w,
			_bx
	)

Value:

    do {                                            \
        if( (_ax) >= (_aw) || (_ax)+(_w) <= 0 )     \
            return;                                 \
        if( (_ax)<0 )                               \
        {   _w += (_ax); _bx += (_ax); _ax= 0;  }   \
        if( (_w) > (_aw)-(_ax) )                    \
            _w = (_aw)-(_ax);                       \
    } while(0)

Function Documentation

chr4c_colset()

INLINE void chr4c_colset	(	u32 *	dstD,
		uint	left,
		uint	right,
		uint	height,
		u32	clr
	)

Fill a rectangle inside a simple tile-column.

Note

left and right must already be between 0 and 8.

References chr4_lmask(), and chr4_rmask().

Referenced by schr4c_rect().

schr4c_floodfill_internal()

void schr4c_floodfill_internal	(	const TSurface *	dst,
		int	x,
		int	y,
		u32	clrNew,
		u32	clrOld
	)

Internal routine for floodfill.

Note

This traverses the lines horizontally. Amazingly, this seems faster than vertically.

References _schr4c_get_pixel(), schr4c_floodfill_internal(), and schr4c_hline().

Referenced by schr4c_floodfill(), and schr4c_floodfill_internal().

Variable Documentation

chr4c_tab

const TSurfaceProcTab chr4c_tab

Initial value:

=
{
    "chr4c",
    schr4c_get_pixel,
    schr4c_plot,
    schr4c_hline,
    schr4c_vline,
    schr4c_line,
    schr4c_rect,
    schr4c_frame,
    schr4c_blit,
    schr4c_floodfill,
}