libtonc: tonc_schr4c.c File Reference

Tonclib

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tonc_schr4c.c File Reference

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

Defines

#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.

Define Documentation

#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

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.

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.

Variable Documentation

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, 
}

Generated on Mon Aug 25 17:03:56 2008 for libtonc by  doxygen 1.5.3

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