fl_draw.H File Reference

utility header to pull drawing functions together More...

#include <FL/Enumerations.H>
#include <FL/Fl_Graphics_Driver.H>
#include <FL/Fl_Rect.H>

Go to the source code of this file.

Enumerations
enum	{   FL_SOLID = 0 , FL_DASH = 1 , FL_DOT = 2 , FL_DASHDOT = 3 ,   FL_DASHDOTDOT = 4 , FL_CAP_FLAT = 0x100 , FL_CAP_ROUND = 0x200 , FL_CAP_SQUARE = 0x300 ,   FL_JOIN_MITER = 0x1000 , FL_JOIN_ROUND = 0x2000 , FL_JOIN_BEVEL = 0x3000 }

Functions
int	fl_add_symbol (const char *name, void(*drawit)(Fl_Color), int scalable)
	Adds a symbol to the system. More...
int	fl_antialias ()
	Return whether line drawings are currently antialiased.
void	fl_antialias (int state)
	Turn antialiased line drawings ON or OFF, if supported by platform. More...
void	fl_arc (double x, double y, double r, double start, double end)
	Add a series of points to the current path on the arc of a circle. More...
void	fl_arc (int x, int y, int w, int h, double a1, double a2)
	Draw ellipse sections using integer coordinates. More...
void	fl_begin_complex_polygon ()
	Start drawing a complex filled polygon. More...
void	fl_begin_line ()
	Start drawing a list of lines.
void	fl_begin_loop ()
	Start drawing a closed sequence of lines.
void	fl_begin_offscreen (Fl_Offscreen ctx)
	Send all subsequent drawing commands to this offscreen buffer. More...
void	fl_begin_points ()
	Start drawing a list of points. More...
void	fl_begin_polygon ()
	Start drawing a convex filled polygon.
char	fl_can_do_alpha_blending ()
	Check whether platform supports true alpha blending for RGBA images. More...
Fl_RGB_Image *	fl_capture_window (Fl_Window *win, int x, int y, int w, int h)
	Captures the content of a rectangular zone of a mapped window. More...
void	fl_chord (int x, int y, int w, int h, double a1, double a2)
	fl_chord declaration is a place holder - the function does not yet exist
void	fl_circle (double x, double y, double r)
	fl_circle(x,y,r) is equivalent to fl_arc(x,y,r,0,360), but may be faster. More...
void	fl_clip (int x, int y, int w, int h)
	Intersect the current clip region with a rectangle and push this new region onto the stack (deprecated). More...
int	fl_clip_box (int x, int y, int w, int h, int &X, int &Y, int &W, int &H)
	Intersect a rectangle with the current clip region and return the bounding box of the result. More...
Fl_Region	fl_clip_region ()
	Return the current clipping region. More...
void	fl_clip_region (Fl_Region r)
	Replace the top of the clipping stack with a clipping region of any shape. More...
Fl_Color	fl_color ()
	Return the last fl_color() that was set. More...
void	fl_color (Fl_Color c)
	Set the color for all subsequent drawing operations. More...
void	fl_color (int c)
	for back compatibility - use fl_color(Fl_Color c) instead
void	fl_color (uchar r, uchar g, uchar b)
	Set the color for all subsequent drawing operations. More...
void	fl_copy_offscreen (int x, int y, int w, int h, Fl_Offscreen pixmap, int srcx, int srcy)
	Copy a rectangular area of the given offscreen buffer into the current drawing destination. More...
Fl_Offscreen	fl_create_offscreen (int w, int h)
	Creation of an offscreen graphics buffer. More...
void	fl_cursor (Fl_Cursor)
	Sets the cursor for the current window to the specified shape and colors. More...
void	fl_cursor (Fl_Cursor, Fl_Color fg, Fl_Color bg=FL_WHITE)
void	fl_curve (double X0, double Y0, double X1, double Y1, double X2, double Y2, double X3, double Y3)
	Add a series of points on a Bézier curve to the path. More...
void	fl_delete_offscreen (Fl_Offscreen ctx)
	Deletion of an offscreen graphics buffer. More...
int	fl_descent ()
	Return the recommended distance above the bottom of a fl_height() tall box to draw the text at so it looks centered vertically in that box.
void	fl_draw (const char *str, int n, int x, int y)
	Draws starting at the given x, y location a UTF-8 string of length n bytes.
void	fl_draw (const char *str, int x, int y)
	Draw a nul-terminated UTF-8 string starting at the given x, y location. More...
void	fl_draw (const char *str, int x, int y, int w, int h, Fl_Align align, Fl_Image *img=0, int draw_symbols=1)
	Fancy string drawing function which is used to draw all the labels. More...
void	fl_draw (const char *str, int x, int y, int w, int h, Fl_Align align, void(*callthis)(const char *, int, int, int), Fl_Image *img=0, int draw_symbols=1)
	The same as fl_draw(const char*,int,int,int,int,Fl_Align,Fl_Image*,int) with the addition of the callthis parameter, which is a pointer to a text drawing function such as fl_draw(const char*, int, int, int) to do the real work.
void	fl_draw (int angle, const char *str, int n, int x, int y)
	Draw at the given x, y location a UTF-8 string of length n bytes rotating angle degrees counter-clockwise. More...
void	fl_draw (int angle, const char *str, int x, int y)
	Draw a nul-terminated UTF-8 string starting at the given x, y location and rotating angle degrees counter-clockwise. More...
void	fl_draw_arrow (Fl_Rect bb, Fl_Arrow_Type t, Fl_Orientation o, Fl_Color color)
	Draw an "arrow like" GUI element for the selected scheme. More...
void	fl_draw_box (Fl_Boxtype, int x, int y, int w, int h, Fl_Color)
	Draws a box using given type, position, size and color. More...
void	fl_draw_check (Fl_Rect bb, Fl_Color col)
	Draw a check mark inside the given bounding box. More...
void	fl_draw_circle (int x, int y, int d, Fl_Color color)
	Draw a potentially small, filled circle using a given color. More...
void	fl_draw_image (const uchar *buf, int X, int Y, int W, int H, int D=3, int L=0)
	Draw an 8-bit per color RGB or luminance image. More...
void	fl_draw_image (Fl_Draw_Image_Cb cb, void *data, int X, int Y, int W, int H, int D=3)
	Draw an image using a callback function to generate image data. More...
void	fl_draw_image_mono (const uchar *buf, int X, int Y, int W, int H, int D=1, int L=0)
	Draw a gray-scale (1 channel) image. More...
void	fl_draw_image_mono (Fl_Draw_Image_Cb cb, void *data, int X, int Y, int W, int H, int D=1)
	Draw a gray-scale image using a callback function to generate image data. More...
int	fl_draw_pixmap (char *const *data, int x, int y, Fl_Color bg=FL_GRAY)
	Draw XPM image data, with the top-left corner at the given position. More...
int	fl_draw_pixmap (const char *const *data, int x, int y, Fl_Color bg=FL_GRAY)
	Draw XPM image data, with the top-left corner at the given position. More...
void	fl_draw_radio (int x, int y, int d, Fl_Color color)
	Draw a round check mark (circle) of a radio button. More...
int	fl_draw_symbol (const char *label, int x, int y, int w, int h, Fl_Color)
	Draw the named symbol in the given rectangle using the given color. More...
void	fl_end_complex_polygon ()
	End complex filled polygon, and draw.
void	fl_end_line ()
	End list of lines, and draw.
void	fl_end_loop ()
	End closed sequence of lines, and draw.
void	fl_end_offscreen ()
	Quit sending drawing commands to the current offscreen buffer.
void	fl_end_points ()
	End list of points, and draw.
void	fl_end_polygon ()
	End convex filled polygon, and draw.
const char *	fl_expand_text (const char *from, char *buf, int maxbuf, double maxw, int &n, double &width, int wrap, int draw_symbols=0)
	Copy from to buf, replacing control characters with ^X. More...
void	fl_focus_rect (int x, int y, int w, int h)
	Draw a dotted rectangle, used to indicate keyboard focus on a widget. More...
Fl_Font	fl_font ()
	Return the face set by the most recent call to fl_font(). More...
void	fl_font (Fl_Font face, Fl_Fontsize fsize)
	Sets the current font, which is then used in various drawing routines. More...
void	fl_frame (const char *s, int x, int y, int w, int h)
	Draws a series of line segments around the given box. More...
void	fl_frame2 (const char *s, int x, int y, int w, int h)
	Draws a series of line segments around the given box. More...
void	fl_gap ()
	Separate loops of the path. More...
int	fl_height ()
	Return the recommended minimum line spacing for the current font. More...
int	fl_height (int font, int size)
	This function returns the actual height of the specified font and size. More...
const char *	fl_latin1_to_local (const char *t, int n=-1)
	Convert text from Windows/X11 latin1 character set to local encoding. More...
void	fl_line (int x, int y, int x1, int y1)
	Draw a line from (x,y) to (x1,y1)
void	fl_line (int x, int y, int x1, int y1, int x2, int y2)
	Draw a line from (x,y) to (x1,y1) and another from (x1,y1) to (x2,y2)
void	fl_line_style (int style, int width=0, char *dashes=0)
	Set how to draw lines (the "pen"). More...
void	fl_load_identity ()
	Set the transformation matrix to identity.
void	fl_load_matrix (double a, double b, double c, double d, double x, double y)
	Set the current transformation matrix. More...
const char *	fl_local_to_latin1 (const char *t, int n=-1)
	Convert text from local encoding to Windows/X11 latin1 character set. More...
const char *	fl_local_to_mac_roman (const char *t, int n=-1)
	Convert text from local encoding to Mac Roman character set. More...
void	fl_loop (int x, int y, int x1, int y1, int x2, int y2)
	Outline a 3-sided polygon with lines.
void	fl_loop (int x, int y, int x1, int y1, int x2, int y2, int x3, int y3)
	Outline a 4-sided polygon with lines.
const char *	fl_mac_roman_to_local (const char *t, int n=-1)
	Convert text from Mac Roman character set to local encoding. More...
void	fl_measure (const char *str, int &x, int &y, int draw_symbols=1)
	Measure how wide and tall the string will be when printed by the fl_draw() function with align parameter. More...
int	fl_measure_pixmap (char *const *data, int &w, int &h)
	Get the dimensions of a pixmap. More...
int	fl_measure_pixmap (const char *const *cdata, int &w, int &h)
	Get the dimensions of a pixmap. More...
void	fl_mult_matrix (double a, double b, double c, double d, double x, double y)
	Concatenate another transformation onto the current one. More...
int	fl_not_clipped (int x, int y, int w, int h)
	Does the rectangle intersect the current clip region? More...
unsigned int	fl_old_shortcut (const char *s)
	Emulation of XForms named shortcuts. More...
void	fl_overlay_clear ()
	Erase a selection rectangle without drawing a new one. More...
void	fl_overlay_rect (int x, int y, int w, int h)
	Draw a transient dotted selection rectangle. More...
float	fl_override_scale ()
	Removes any GUI scaling factor in subsequent drawing operations. More...
void	fl_pie (int x, int y, int w, int h, double a1, double a2)
	Draw filled ellipse sections using integer coordinates. More...
void	fl_point (int x, int y)
	Draw a single pixel at the given coordinates.
void	fl_polygon (int x, int y, int x1, int y1, int x2, int y2)
	Fill a 3-sided polygon. More...
void	fl_polygon (int x, int y, int x1, int y1, int x2, int y2, int x3, int y3)
	Fill a 4-sided polygon. More...
void	fl_pop_clip ()
	Restore the previous clip region. More...
void	fl_pop_matrix ()
	Restore the current transformation matrix from the stack.
void	fl_push_clip (int x, int y, int w, int h)
	Intersect the current clip region with a rectangle and push this new region onto the stack. More...
void	fl_push_matrix ()
	Save the current transformation matrix on the stack. More...
void	fl_push_no_clip ()
	Push an empty clip region onto the stack so nothing will be clipped.
uchar *	fl_read_image (uchar *p, int X, int Y, int W, int H, int alpha=0)
	Reads an RGB(A) image from the current window or off-screen buffer. More...
void	fl_rect (Fl_Rect r)
	Draw a border inside the given bounding box. More...
void	fl_rect (int x, int y, int w, int h)
	Draw a border inside the given bounding box. More...
void	fl_rect (int x, int y, int w, int h, Fl_Color c)
	Draw with passed color a border inside the given bounding box. More...
void	fl_rectf (Fl_Rect bb, uchar r, uchar g, uchar b)
	Color a rectangle with "exactly" the passed r,g,b color. More...
void	fl_rectf (Fl_Rect r)
	Color with current color a rectangle that exactly fills the given bounding box.
void	fl_rectf (Fl_Rect r, Fl_Color c)
	Color with passed color a rectangle that exactly fills the given bounding box. More...
void	fl_rectf (int x, int y, int w, int h)
	Color with current color a rectangle that exactly fills the given bounding box.
void	fl_rectf (int x, int y, int w, int h, Fl_Color c)
	Color with passed color a rectangle that exactly fills the given bounding box. More...
void	fl_rectf (int x, int y, int w, int h, uchar r, uchar g, uchar b)
	Color a rectangle with "exactly" the passed r,g,b color. More...
void	fl_rescale_offscreen (Fl_Offscreen &ctx)
	Adapts an offscreen buffer to a changed value of the scale factor. More...
void	fl_reset_spot (void)
	Resets marked text. More...
void	fl_restore_clip ()
	Undo any clobbering of the clip region done by your program.
void	fl_restore_scale (float s)
	Restores the GUI scaling factor and the clipping region in subsequent drawing operations. More...
void	fl_rotate (double d)
	Concatenate rotation transformation onto the current one. More...
void	fl_rounded_rect (int x, int y, int w, int h, int r)
	Draw a rounded border inside the given bounding box. More...
void	fl_rounded_rectf (int x, int y, int w, int h, int r)
	Color with current color a rounded rectangle that exactly fills the given bounding box. More...
void	fl_rtl_draw (const char *str, int n, int x, int y)
	Draw a UTF-8 string of length n bytes right to left starting at the given x, y location.
void	fl_scale (double x)
	Concatenate scaling transformation onto the current one. More...
void	fl_scale (double x, double y)
	Concatenate scaling transformation onto the current one. More...
void	fl_scroll (int X, int Y, int W, int H, int dx, int dy, void(*draw_area)(void *, int, int, int, int), void *data)
	Scroll a rectangle and draw the newly exposed portions. More...
void	fl_set_spot (int font, int size, int X, int Y, int W, int H, Fl_Window *win=0)
	Inform text input methods about the current text insertion cursor. More...
void	fl_set_status (int X, int Y, int W, int H)
	Related to text input methods under X11. More...
const char *	fl_shortcut_label (unsigned int shortcut)
	Get a human-readable string from a shortcut value. More...
const char *	fl_shortcut_label (unsigned int shortcut, const char **eom)
	Get a human-readable string from a shortcut value. More...
Fl_Fontsize	fl_size ()
	Return the size set by the most recent call to fl_font(). More...
void	fl_text_extents (const char *, int &dx, int &dy, int &w, int &h)
	Determine the minimum pixel dimensions of a nul-terminated string using the current fl_font(). More...
void	fl_text_extents (const char *t, int n, int &dx, int &dy, int &w, int &h)
	Determine the minimum pixel dimensions of a sequence of n characters (bytes) using the current fl_font(). More...
double	fl_transform_dx (double x, double y)
	Transform distance using current transformation matrix. More...
double	fl_transform_dy (double x, double y)
	Transform distance using current transformation matrix. More...
double	fl_transform_x (double x, double y)
	Transform coordinate using the current transformation matrix. More...
double	fl_transform_y (double x, double y)
	Transform coordinate using the current transformation matrix. More...
void	fl_transformed_vertex (double xf, double yf)
	Add coordinate pair to the vertex list without further transformations. More...
void	fl_translate (double x, double y)
	Concatenate translation transformation onto the current one. More...
void	fl_vertex (double x, double y)
	Add a single vertex to the current path. More...
double	fl_width (const char *txt)
	Return the typographical width of a nul-terminated string using the current font face and size.
double	fl_width (const char *txt, int n)
	Return the typographical width of a sequence of n characters using the current font face and size.
double	fl_width (unsigned int c)
	Return the typographical width of a single character using the current font face and size. More...
void	fl_xyline (int x, int y, int x1)
	Draw a horizontal line from (x,y) to (x1,y).
void	fl_xyline (int x, int y, int x1, int y2)
	Draw a horizontal line from (x,y) to (x1,y), then vertical from (x1,y) to (x1,y2).
void	fl_xyline (int x, int y, int x1, int y2, int x3)
	Draw a horizontal line from (x,y) to (x1,y), then a vertical from (x1,y) to (x1,y2) and then another horizontal from (x1,y2) to (x3,y2).
void	fl_yxline (int x, int y, int y1)
	Draw a vertical line from (x,y) to (x,y1)
void	fl_yxline (int x, int y, int y1, int x2)
	Draw a vertical line from (x,y) to (x,y1), then a horizontal from (x,y1) to (x2,y1).
void	fl_yxline (int x, int y, int y1, int x2, int y3)
	Draw a vertical line from (x,y) to (x,y1), then a horizontal from (x,y1) to (x2,y1), then another vertical from (x2,y1) to (x2,y3).

Variables
char	fl_draw_shortcut

Detailed Description

utility header to pull drawing functions together