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gfxcore.h File Reference

#include "bitmap.h"
#include "gfxfont.h"

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Data Structures
struct	Graphics
	Structure to hold information about a graphics context. More...
Defines
#define	GFX_SCRATCH_SIZE   2048
	Scratch memory for internal use.
Typedefs
typedef Graphics	Graphics
	Structure to hold information about a graphics context.
Functions
void	GFX_Init (Graphics *gfx, Bitmap *bm)
void	GFX_Init (Graphics *gfx, Graphics *gfx2)
	Copy a graphics context structure.
void	GFX_SetFont (Graphics *gfx, Font *font)
	Set the current font.
void	GFX_SetFillStyle (Graphics *gfx, char *style)
	Set the current fillStyle.
void	GFX_SetColor (Graphics *gfx, int color)
void	GFX_SetBlitMode (Graphics *gfx, int mode)
void	GFX_MoveRel (Graphics *gfx, int dx, int dy)
	Move the current position by (dx,dy).
void	GFX_MoveTo (Graphics *gfx, int x, int y)
	Set the current position to (x,y).
void	GFX_HLine (Graphics *gfx, int x, int y, int w)
	Draw a horizontal line.
void	GFX_VLine (Graphics *gfx, int x, int y, int h)
	Draw a vertical line.
void	GFX_Line (Graphics *gfx, int x1, int y1, int x2, int y2)
	Draw a line using the bresenham algorithm.
void	GFX_LineRel (Graphics *gfx, int dx, int dy)
	Draw a line relative from the current position.
void	GFX_LineTo (Graphics *gfx, int x, int y)
	Draw a line from the current position to (x,y) and set (x,y) to be the new current position.
void	GFX_Circle (Graphics *gfx, int xc, int yc, int r)
	Draw a circle.
void	GFX_Rectangle (Graphics *gfx, int x, int y, int w, int h)
	Draws a rectangle with upper left corner at (x,y) and with width w and height h.
void	GFX_FillRect (Graphics *gfx, int x, int y, int w, int h)
	Draw a filled rectangle.
Variables
Bitmap *	_gfx_scratch
char	emptyFill []
	fillStyles
char	solidFill []
char	lineFill []
char	ltSlashFill []
char	slashFill []
char	bkSlashFill []
char	ltBkSlashFill []
char	hatchFill []
char	xHatchFill []
char	xLeaveFill []
char	wDotFill []
char	cDotFill []

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Define Documentation

#define GFX_SCRATCH_SIZE   2048

Scratch memory for internal use. Definition at line 11 of file gfxcore.h.

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Typedef Documentation

typedef struct Graphics Graphics

Structure to hold information about a graphics context.

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Function Documentation

void GFX_Circle (  Graphics *    gfx, int    xc, int    yc, int    r )

Draw a circle. Parameters: gfx  Graphics context to use. xc,yc  coordinates of center point. r  radius (in pixels) Definition at line 416 of file gfxcore.cpp. References Graphics::bitmap, BM_PutPixel(), and Graphics::color.

void GFX_FillRect (  Graphics *    gfx, int    x, int    y, int    w, int    h )

Draw a filled rectangle. Parameters: gfx  Graphics context to use. x, y  coordinates for top-left corner w, h  width and height Bug: the fillpattern does not move correctly, when clipped at the left or top border. Definition at line 449 of file gfxcore.cpp. References Graphics::bitmap, Graphics::blitMode, BM_FastBlit(), Bitmap::bmBits, Graphics::fillStyle, Bitmap::height, src, and Bitmap::width. Referenced by GFX_ProgressBar().

void GFX_HLine (  Graphics *    gfx, int    x, int    y, int    w )

Draw a horizontal line. Note: use this function directly instead of calling line whenever possible! Definition at line 150 of file gfxcore.cpp. References Graphics::bitmap, Bitmap::bmBits, Graphics::color, Bitmap::height, and Bitmap::width. Referenced by GFX_Line(), GFX_Rectangle(), and GFX_RoundRect().

void GFX_Init (  Graphics *    gfx, Graphics *    gfx2 )

Copy a graphics context structure. This function is quite useful for creating a temporary context inside a drawing function. So You can change drawing modes without modifying the original context. Parameters: gfx  Pointer to Graphics structure. bm  Pointer to Bitmap to work on. Definition at line 81 of file gfxcore.cpp. Referenced by GFX_ProgressBar(), and gfxTest().

void GFX_Init (  Graphics *    gfx, Bitmap *    bm )

void GFX_Line (  Graphics *    gfx, int    x1, int    y1, int    x2, int    y2 )

Draw a line using the bresenham algorithm. Parameters: gfx  Graphics context to use. x1, y1, x2, y2  line coordinates. Note: this function is quite slow, and optimizing it would take a somewhat great effort. (subpixel-accurate cohen- sutherland clipping should be implemented, assembler versions for 4 octants * 2 drawing colors..) If you really need a faster line implementation, drop a mail to thomas.kindler@gmx.de (a nice crate of beer might be helpful ;) Definition at line 318 of file gfxcore.cpp. References Graphics::bitmap, BM_PutPixel(), Graphics::color, GFX_HLine(), and GFX_VLine(). Referenced by GFX_LineRel(), GFX_LineTo(), and GFX_RoundRect().

void GFX_LineRel (  Graphics *    gfx, int    dx, int    dy )

Draw a line relative from the current position. Parameters: gfx  Graphics context to use. dx, dy  distance from current position. Definition at line 366 of file gfxcore.cpp. References GFX_Line(), Graphics::x, and Graphics::y.

void GFX_LineTo (  Graphics *    gfx, int    x, int    y )

Draw a line from the current position to (x,y) and set (x,y) to be the new current position. Parameters: gfx  Graphics context to use. x, y  end coordinates. Definition at line 381 of file gfxcore.cpp. References GFX_Line(), Graphics::x, and Graphics::y.

void GFX_MoveRel (  Graphics *    gfx, int    dx, int    dy )

Move the current position by (dx,dy). Definition at line 137 of file gfxcore.cpp. References Graphics::x, and Graphics::y.

void GFX_MoveTo (  Graphics *    gfx, int    x, int    y )

Set the current position to (x,y). Definition at line 126 of file gfxcore.cpp. References Graphics::x, and Graphics::y.

void GFX_Rectangle (  Graphics *    gfx, int    x, int    y, int    w, int    h )

Draws a rectangle with upper left corner at (x,y) and with width w and height h. Parameters: gfx  Graphics context to use. x, y  coordinates for top-left corner w, h  width and height Definition at line 398 of file gfxcore.cpp. References GFX_HLine(), and GFX_VLine(). Referenced by GFX_ProgressBar().

void GFX_SetBlitMode (  Graphics *    gfx, int    mode )

Definition at line 116 of file gfxcore.cpp. References Graphics::blitMode. Referenced by GFX_ProgressBar().

void GFX_SetColor (  Graphics *    gfx, int    color )

Definition at line 110 of file gfxcore.cpp. References Graphics::color.

void GFX_SetFillStyle (  Graphics *    gfx, char *    style )

Set the current fillStyle. Definition at line 104 of file gfxcore.cpp. References Graphics::fillStyle. Referenced by GFX_ProgressBar().

void GFX_SetFont (  Graphics *    gfx, Font *    font )

Set the current font. If font is NULL, the default font is set. Definition at line 92 of file gfxcore.cpp. References _font_sysfont, Graphics::font, and font. Referenced by gfxTest().

void GFX_VLine (  Graphics *    gfx, int    x, int    y, int    h )

Draw a vertical line. Note: use this function directly instead of calling line whenever possible! Definition at line 227 of file gfxcore.cpp. References Graphics::bitmap, Bitmap::bmBits, Graphics::color, fbm, Bitmap::height, lbm, pages, and Bitmap::width. Referenced by GFX_Line(), GFX_Rectangle(), and GFX_RoundRect().

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Variable Documentation

Bitmap* _gfx_scratch

Definition at line 12 of file gfxcore.h.

char bkSlashFill[]

Definition at line 23 of file gfxcore.h.

char cDotFill[]

Definition at line 29 of file gfxcore.h.

char emptyFill[]

fillStyles Definition at line 18 of file gfxcore.h.

char hatchFill[]

Definition at line 25 of file gfxcore.h.

char lineFill[]

Definition at line 20 of file gfxcore.h.

char ltBkSlashFill[]

Definition at line 24 of file gfxcore.h.

char ltSlashFill[]

Definition at line 21 of file gfxcore.h.

char slashFill[]

Definition at line 22 of file gfxcore.h.

char solidFill[]

Definition at line 19 of file gfxcore.h. Referenced by GFX_Init().

char wDotFill[]

Definition at line 28 of file gfxcore.h.

char xHatchFill[]

Definition at line 26 of file gfxcore.h.

char xLeaveFill[]

Definition at line 27 of file gfxcore.h.

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