Introduction to c
Some graphics_drivers supported by Turbo C
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- VGALO 640x200
- Structure: time
Some graphics_drivers supported by Turbo CCGA EGA
EGAMONO VGA
MCGA DETECT (Requests auto-detection) Some graphics_modes for each driver supported by Turbo C.CGAC0 320x200 palette 0 CGAHI 640x200 MCGAC0 320x200 palette 0 MCGAMED 640x200 MCGAHI 640x480 EGALO 640x200 16 color EGAHI 640x350 16 color EGA64LO 640x200 16 color EGA64HI 640x350 4 color EGAMONOHI 640x350 VGALO 640x200VGAMED 640x350 VGAHI 640x480 The most fundamental graphics routine is the one that writes the pixel, the smallest addressable point on the video monitor. Turbo C allows you to write a pixel at specified point on your screen with the help of the putpixel().prototype : void far putpixel(int x, int y, int color); where x and y are the screen co-ordinates and color specifies the color with which the pixel is drawn on the screen. e.g.:- putpixel(200, 100, 3); some functions from graphics.h bar: draws a bar void far bar(int left, int top, int right, int bottom); bar3d: draws a 3-D bar void far bar3d(int left, int top, int right, int bottom, int depth, int topflag); circle: draws a circle at (x,y) of the given radius void far circle(int x, int y, int radius); cleardevice: clears the graphics screen void far cleardevice(void); clearviewport: clears the current viewport void far clearviewport(void); ellipse: draws an elliptical arc void far ellipse(int x, int y, int stangle, int endangle, int xradius, int yradius); (x,y) is the center point. stangle and endangle are start and end angles in degrees. xradius and yradius are horizontal and vertical radii. fillellipse: draws and fills elliptical arc void far fillellipse(int x, int y, int xradius, int yradius); Uses (x,y) as the center point and fills arc using the current fill pattern. xradius and yradius are horizontal and vertical radii.
void far floodfill(int x, int y, int border); getimage: saves a bit image of the specified region into memory void far getimage(int left, int top, int right, int bottom, void far *bitmap);
int far getmaxcolor(void); getmaxx: returns maximum x screen coordinate int far getmaxx(void); getmaxy: returns maximum y screen coordinate int far getmaxy(void); line: draws a line between two specified points void far line(int x1, int y1, int x2, int y2); Draws a line from (x1,y1) to (x2,y2) using the current color, line style and thickness. lineto: draws a line from the Current Position to (x,y) void far lineto(int x, int y); moveto: moves the Current Position to (x,y) void far moveto(int x, int y); outtext: displays a string in the viewport void far outtext(char far *textstring); outtextxy: sends a string to the specified location (graphics mode) void far outtextxy(int x, int y, char far *textstring); pieslice: draws and fills in pie slice void far pieslice(int x, int y, int stangle, int endangle, int radius); putimage: outputs a bit image onto the screen void far putimage(int left, int top, void far *bitmap, int op); bitmap points to a bitmap, normally created by the getimage function. The op value specifies how the image will be combined with the current contents of the area at (left,top). imagesize: returns the number of bytes required to store a bit image unsigned far imagesize(int left, int top, int right, int bottom); If the size required for the selected image is greater than or equal to 64K-1 bytes, it returns 0xFFFF. rectangle: draws a rectangle (graphics mode) void far rectangle(int left, int top, int right, int bottom); Uses current line style, thickness and color. sector: draws/fills elliptical pie slice void far sector(int x, inty, int stangle, int endangle, int xradius, int yradius); x and y define the center point. stangle and endangle define start and end angles. xradius and yradius are horizontal and vertical radii. setcolor: sets the current drawing color void far setcolor(int color); setfillstyle: sets the fill pattern and color void far setfillstyle(int pattern, int color); setfillstyle patterns EMPTY_FILL uses background color SOLID_FILL uses solid fill color LINE_FILL --- fill LTSLASH_FILL /// fill SLASH_FILL /// fill thick lines BKSLASH_FILL \\\ fill thick lines LTBKSLASH_FILL \\\ fill settextstyle: sets the current text characteristics void far settextstyle(int font, int direction, int charsize); Enumerated type: font_names DEFAULT_FONT 8x8 bit mapped font TRIPLEX_FONT "Stroked" fonts SMALL_FONT0 SANS_SERIF_FONT GOTHIC_FONT Defines: direction of graphics output HORIZ_DIR left to right VERT_DIR bottom to top
syntax : void gettime(struct time *timeptr); Structure: timestruct time { unsigned char ti_min; unsigned char ti_hour; unsigned char ti_hund; unsigned char ti_sec;
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