graphics.h

fpga设计评估软件

#define SCREEN 0 
#define POSTSCRIPT 1 

#define NUM_COLOR 11
enum color_types {WHITE, BLACK, DARKGREY, LIGHTGREY, BLUE, GREEN, YELLOW,
   CYAN, RED, DARKGREEN, MAGENTA};

enum line_types {SOLID, DASHED};

#define MAXPTS 100    /* Maximum number of points drawable by fillpoly */
typedef struct {float x; float y;} t_point; /* Used in calls to fillpoly */


/* Routine for X Windows Input.  act_on_button responds to buttons  *
 * being pressed in the graphics area.  drawscreen is the user's    *
 * routine that can redraw all the graphics.                        */

void event_loop (void (*act_on_button) (float x, float y),
                 void (*drawscreen) (void));  

void init_graphics (char *window_name);  /* Initializes X display */ 
void close_graphics (void);              /* Closes X display      */

/* Changes message in text area. */
void update_message (char *msg);

/* Normal users shouldn't have to use draw_message.  Should only be *
 * useful if using non-interactive graphics and you want to redraw  *
 * yourself because of an expose.                                   */

void draw_message (void);     

/* Sets world coordinates */
void init_world (float xl, float yt, float xr, float yb); 

void flushinput (void);   /* Empties event queue */

/* Following routines draw to SCREEN if disp_type = SCREEN *
 * and to a PostScript file if disp_type = POSTSCRIPT      */

void setcolor (int cindex);  /* Use a constant from clist */
void setlinestyle (int linestyle);  
void setlinewidth (int linewidth);
void setfontsize (int pointsize);
void drawline (float x1, float y1, float x2, float y2);
void drawrect (float x1, float y1, float x2, float y2);
void fillrect (float x1, float y1, float x2, float y2);
void fillpoly (t_point *points, int npoints); 

/* Draw or fill a circular arc, respectively.  Angles in degrees.  startang  *
 * measured from positive x-axis of Window.  Positive angextent means        *
 * counterclockwise arc.                                                     */

void drawarc (float xcen, float ycen, float rad, float startang,
  float angextent); 
void fillarc (float xcen, float ycen, float rad, float startang,
  float angextent);

/* boundx specifies horizontal bounding box.  If text won't fit in    *
 * the space specified by boundx (world coordinates) text isn't drawn */

void drawtext (float xc, float yc, char *text, float boundx);
void clearscreen (void);                 /* Erases the screen */


/* Functions for creating and destroying extra menu buttons. */

void create_button (char *prev_button_text , char *button_text, 
       void (*button_func) (void (*drawscreen) (void))); 
void destroy_button (char *button_text);


/* Opens file for postscript commands and initializes it.  All subsequent  *
 * drawing commands go to this file until close_postscript is called.      */

int init_postscript (char *fname);   /* Returns 1 if successful */

/* Closes file and directs output to screen again.       */

void close_postscript (void);