initgraph()
InitGraph:
Initializes the graphics system.
Declaration:
void far initgraph(int far *graphdriver, int far *graphmode, char far *pathtodriver);
Remarks: To start the graphics system, you must first call initgraph.
initgraph initializes the graphics system by loading a graphics driver from disk (or validating a registered driver) then putting the system into graphics mode.
initgraph also resets all graphics settings (color, palette, current position, viewport, etc.) to their defaults, then resets graphresult to 0.
Arguments:
*graphdriver:
Integer that specifies the graphics driver to be used. You can give graphdriver a value using a constant of the graphics drivers enumeration type.
*graphmode :
Integer that specifies the initial graphics mode (unless *graphdriver = DETECT). If *graphdriver = DETECT, initgraph sets *graphmode to the highest resolution available for the detected driver. You can give *graphmode a value using a constant of the graphics_modes enumeration type.
pathtodriver :
Specifies the directory path where initgraph looks for graphics drivers (*.BGI) first. If they're not there, initgraph looks in the current directory. If pathtodriver is null, the driver files must be in the current directory. This is also the path settextstyle searches for the stroked character font files (*.CHR).
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Colors
| Color |
Value |
| BLACK |
0 |
| BLUE |
1 |
| GREEN |
2 |
| CYAN |
3 |
| RED |
4 |
| MAGENTA |
5 |
| BROWN |
6 |
| LIGHTGRAY |
7 |
| DARKGRAY |
8 |
| LIGHTBLUE |
9 |
| LIGHTGREEN |
10 |
| LIGHTCYAN |
11 |
| LIGHTRED |
12 |
| LIGHTMAGENTA |
13 |
| YELLOW |
14 |
| WHITE |
15 |
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Declaration:
- void far setfillstyle(int pattern, int color);
- void far setcolor(int color);
- void far setbkcolor(int color);
Remarks:
- setfillstyle sets the current fill pattern and fill color.
- setcolor sets the current drawing color to color,
- which can range from 0 to getmaxcolor.
- setbkcolor sets the background to the color specified by color.
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The parameter pattern in setfillstyle is as follows:
| Names |
Value |
Means Fill With... |
| EMPTY_FILL |
0 |
Background color |
| SOLID_FILL |
1 |
Solid fill |
| LINE_FILL |
2 |
--- |
| LTSLASH_FILL |
3 |
/// |
| SLASH_FILL |
4 |
///, thick lines |
| BKSLASH_FILL |
5 |
\\\, thick lines |
| LTBKSLASH_FILL |
6 |
\\\ |
| HATCH_FILL |
7 |
Light hatch |
| XHATCH_FILL |
8 |
Heavy crosshatch |
| INTERLEAVE_FILL |
9 |
Interleaving lines |
| WIDE_DOT_FILL |
10 |
Widely spaced dots |
| CLOSE_DOT_FILL |
11 |
Closely spaced dots |
| USER_FILL |
12 |
User-defined fill pattern |
setfillstyle function sets the current fill pattern and fill color.
floodfill
void floodfill(int x, int y, int border);
floodfill function is used to fill an enclosed area.
(x, y) is any point on the screen if (x,y) lies inside the area
then inside will be filled otherwise outside will be filled.
Border specifies the color of boundary of area.
To change fill pattern and fill color use setfillstyle.
Text
(setcolor() works for the below)
outtext()
void outtext(char *textstring);
outtextxy()
void outtextxy(int x, int y, char *textstring);
settextstyle()
void settextstyle(int font, int direction, int charsize);
A call to settextstyle affects all text output by outtext and outtextxy.
FONT:
| Name |
Value |
Description |
| DEFAULT_FONT |
0 |
8x8 bit-mapped font |
| TRIPLEX_FONT |
1 |
Stroked triplex font |
| SMALL_FONT |
2 |
Stroked small font |
| SANS_SERIF_FONT |
3 |
Stroked sans-serif font |
| GOTHIC_FONT |
4 |
Stroked gothic font |
| SCRIPT_FONT |
5 |
Stroked script font |
| SIMPLEX_FONT |
6 |
Stroked triplex script font |
| TRIPLEX_SCR_FONT |
7 |
Stroked triplex script font |
| COMPLEX_FONT |
8 |
Stroked complex font |
| EUROPEAN_FONT |
9 |
Stroked European font |
| BOLD_FONT |
10 |
Stroked bold font |
DIRECTION:
The direction can be changed to VERT_DIR from the default HORIZ_DIR
SIZE:
Font size acts like a magnifying factor. Default or 1 is 8x8 bit character.
Using 2, doubles it, making it 16x16.
EXAMPLE:
settextstyle(5, HORIZ_DIR, 1);
Circles, arc, pieslice
Declaration:
- void far arc(int x, int y, int stangle, int endangle, int radius);
- void far circle(int x, int y, int radius);
- void far pieslice(int x, int y, int stangle, int endangle, int radius);
Remarks:
- arc draws a circular arc in the current drawing color.
- circle draws a circle in the current drawing color.
- pieslice draws a pie slice in the current drawing color, then fills it using
the current fill pattern and fill color.
Arguments:
- (x,y): Center point of arc, circlew, or pie slice
- stangle: Start angle in degrees
- endangle: End angle in degrees
- radius: Radius of arc, circle, and pieslice
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