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|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <X11/Xlib.h>
/***********************************************************************************
* *
* An extension for, the Xlib library, *
* with easy GC (Graphic Context) generating functions. *
* Written by Luke Spywoker for all Xlib users. *
* *
* Thank's to Christophe Tronche for the docummentation *
* you can get it at http://tronche.com/gui/x/xlib/ *
* Mail: ch.tronche@computer.org *
* *
***********************************************************************************/
/** Generate an hexdecimal string from rgb (red,green,blue) values. */
char *get_hex_from_rgb(char* color_hex_res,int8_t red,int8_t green,int8_t blue) ;
/** return an GC (Graphic Context) for simply dashed line. */
GC get_dashed_line_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,unsigned int line_width, int line_style, int cap_style, int join_style,int dash_offset, char dash_list[],int nun_elt_dash_list) ;
/** return an Graphic Context) for dashed line composed with an pixmap. */
GC get_pixmap_dashed_line_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,unsigned int line_width, int line_style, int cap_style, int join_style,int dash_offset, char dash_list[],int nun_elt_dash_list,int fill_style,Pixmap tile, Pixmap stipple)
/** return an GC (Graphic Context) for simply line. */
GC get_simple_line_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,unsigned int line_width, int line_style, int cap_style, int join_style) ;
/** return an Graphic Context) for filling forms composed with an pixmap. */
GC get_pixmap_fill_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,int fill_style,Pixmap tile, Pixmap stipple) ;
/** return an GC (Graphic Context) for simply filling forms. */
GC get_simple_fill_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg) ;
char *get_hex_from_rgb(char* color_hex_res,int8_t red,int8_t green,int8_t blue) {
/**
* This function return an hexadecimal string in form "#%02X%02X%02X"
*
* char* color_hex_res ; The result hexdecimal string returned
* char * hex_string=malloc(8) ;
*
* int red ; rgb red value [0-255]
* int green ; rgb green value [0-255]
* int blue ; reg blue value [0-255]
*
* */
memset(color_hex_res,'\0',8) ;
char *color_hex_red=malloc(3) ;
char *color_hex_green=malloc(3) ;
char *color_hex_blue=malloc(3) ;
snprintf(color_hex_red,3,"%02X",red) ;
snprintf(color_hex_green,3,"%02X",green) ;
snprintf(color_hex_blue,3,"%02X",blue) ;
strcpy(color_hex_res,"#") ;
strcat(color_hex_res,color_hex_red) ;
strcat(color_hex_res,color_hex_green) ;
strcat(color_hex_res,color_hex_blue) ;
free(color_hex_red) ;
free(color_hex_green) ;
free(color_hex_blue) ;
return color_hex_res ;
}
GC get_dashed_line_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,unsigned int line_width, int line_style, int cap_style, int join_style,int dash_offset, char dash_list[],int nun_elt_dash_list) {
/**
* This function return an GC (Graphic Context) for dashed line drawing.
*
* display an pointer on the display.
* win the window to draw in.
*
* char *color_hex_fg; An hexadecimal formated string representing the foreground color of the GC (Graphic Context).
*
* char *color_hex_bg; An hexadecimal formated string representing the background color of the GC (Graphic Context).
*
* int line_width ; line width (in pixels)
*
* int line_style ; LineSolid, LineOnOffDash, LineDoubleDash
* The line-style defines which sections of a line are drawn:
* LineSolid The full path of the line is drawn.
* LineDoubleDash The full path of the line is drawn, but the even dashes are filled differently than the odd dashes (see fill-style) with
* CapButt style used where even and odd dashes meet.
* LineOnOffDash Only the even dashes are drawn, and cap-style applies to all internal ends of the individual dashes, except CapNotLast is treated as CapButt.
*
* int cap_style ; CapNotLast, CapButt, CapRound, CapProjecting
* The cap-style defines how the endpoints of a path are drawn:
* CapNotLast This is equivalent to CapButt except that for a line-width of zero the final endpoint is not drawn.
* CapButt The line is square at the endpoint (perpendicular to the slope of the line) with no projection beyond.
* CapRound The line has a circular arc with the diameter equal to the line-width, centered on the endpoint. (This is equivalent to CapButt for line-width of zero).
* CapProjecting The line is square at the end, but the path continues beyond the endpoint for a distance equal to half the line-width. (This is equivalent to CapButt for line-width of zero).
*
* int join_style ; JoinMiter, JoinRound, JoinBevel
* The join-style defines how corners are drawn for wide lines:
* JoinMiter The outer edges of two lines extend to meet at an angle. However, if the angle is less than 11 degrees, then a JoinBevel join-style is used instead.
* JoinRound The corner is a circular arc with the diameter equal to the line-width, centered on the joinpoint.
* JoinBevel The corner has CapButt endpoint styles with the triangular notch filled.
*
* int dash_offset Specifies the phase of the pattern for the dashed line-style you want to set for the specified GC.
* char dash_list[] Specifies the dash-list for the dashed line-style you want to set for the specified GC.
* int nun_elt_dash_list Specifies the number of elements in dash_list.
*
**/
if ( strlen(color_hex_fg) == 7 && strlen(color_hex_bg) == 7 ) {
int c ;
for (c=1 ; c < 7 ; c++) {
if (! isxdigit(color_hex_fg[c]) || ! isxdigit(color_hex_bg[c]) ) {
return NULL ;
}
}
}
else {
return NULL ;
}
Colormap colormap ;
XColor fg_color, bg_color ;
GC ret=XCreateGC(display,win,0,0) ;
colormap=DefaultColormap(display,0) ;
XParseColor(display,colormap,color_hex_fg,&fg_color) ;
XAllocColor(display,colormap,&fg_color) ;
XSetForeground(display,ret,fg_color.pixel) ;
XParseColor(display,colormap,color_hex_bg,&bg_color) ;
XAllocColor(display,colormap,&bg_color) ;
XSetBackground(display,ret,bg_color.pixel) ;
if (line_width || line_width || line_style || cap_style || join_style ) {
XSetLineAttributes(display, ret, line_width, line_style, cap_style, join_style) ;
if ( line_style ) {
if ( line_style == LineOnOffDash || line_style == LineDoubleDash ) {
XSetDashes(display,ret, dash_offset, dash_list, nun_elt_dash_list) ;
/**
* dash_offset Specifies the phase of the pattern for the dashed line-style you want to set for the specified GC.
* dash_list Specifies the dash-list for the dashed line-style you want to set for the specified GC.
* nun_elt_dash_list Specifies the number of elements in dash_list.
**/
}
}
}
return ret ;
}
GC get_pixmap_dashed_line_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,unsigned int line_width, int line_style, int cap_style, int join_style,int dash_offset, char dash_list[],int nun_elt_dash_list,int fill_style,Pixmap tile, Pixmap stipple) {
/**
* This function return an GC (Graphic Context) for a pixmap dashed line drawing.
*
* display an pointer on the display.
* win the window to draw in.
*
* char *color_hex_fg; An hexadecimal formated string representing the foreground color of the GC (Graphic Context).
*
* char *color_hex_bg; An hexadecimal formated string representing the background color of the GC (Graphic Context).
*
* int line_width ; line width (in pixels)
*
* int line_style ; LineSolid, LineOnOffDash, LineDoubleDash
* The line-style defines which sections of a line are drawn:
* LineSolid The full path of the line is drawn.
* LineDoubleDash The full path of the line is drawn, but the even dashes are filled differently than the odd dashes (see fill-style) with
* CapButt style used where even and odd dashes meet.
* LineOnOffDash Only the even dashes are drawn, and cap-style applies to all internal ends of the individual dashes, except CapNotLast is treated as CapButt.
*
* int cap_style ; CapNotLast, CapButt, CapRound, CapProjecting
* The cap-style defines how the endpoints of a path are drawn:
* CapNotLast This is equivalent to CapButt except that for a line-width of zero the final endpoint is not drawn.
* CapButt The line is square at the endpoint (perpendicular to the slope of the line) with no projection beyond.
* CapRound The line has a circular arc with the diameter equal to the line-width, centered on the endpoint. (This is equivalent to CapButt for line-width of zero).
* CapProjecting The line is square at the end, but the path continues beyond the endpoint for a distance equal to half the line-width. (This is equivalent to CapButt for line-width of zero).
*
* int join_style ; JoinMiter, JoinRound, JoinBevel
* The join-style defines how corners are drawn for wide lines:
* JoinMiter The outer edges of two lines extend to meet at an angle. However, if the angle is less than 11 degrees, then a JoinBevel join-style is used instead.
* JoinRound The corner is a circular arc with the diameter equal to the line-width, centered on the joinpoint.
* JoinBevel The corner has CapButt endpoint styles with the triangular notch filled.
*
* int fill_style For the even dashes for line requests with line-style LineOnOffDash or LineDoubleDash, the following apply:
* FillSolid Foreground
* FillTiled Tile
* FillOpaqueStippled A tile with the same width and height as stipple, but with background everywhere stipple has a zero and with foreground everywhere stipple has a one
* FillStippled Foreground masked by stipple
*
* int dash_offset Specifies the phase of the pattern for the dashed line-style you want to set for the specified GC.
* char dash_list[] Specifies the dash-list for the dashed line-style you want to set for the specified GC.
* int nun_elt_dash_list Specifies the number of elements in dash_list.
*
* Pixmap tile an Pixmap image:
* Pixmap stipple
* unsigned int pixmap_width, pixmap_height ;
* int icon_hot_width, icon_hot_height ;
* Pixmap pixmap_bits ;
* XReadBitmapFile(display, win, "/path/to/pixmap_file.xbm", &pixmap_width, &pixmap_height, &pixmap_bits, &pixmap_hot_width, &pixmap_hot_height) ;
*
* * The mechanic of pixmap image is that the white pixels are set in the color of the GC (Graphic Context) foreground color ;
* * The mechanic of pixmap image is that the black pixels are set in the color of the GC (Graphic Context) background color ;
*
* // Use XCopyPlane(display, pixmap_bits, win, gc, 0, 0, pixmap_width, pixmap_height, pos_x, pos_y, 1) ; to display it.
*
* */
if ( strlen(color_hex_fg) == 7 && strlen(color_hex_bg) == 7 ) {
int c ;
for (c=1 ; c < 7 ; c++) {
if (! isxdigit(color_hex_fg[c]) || ! isxdigit(color_hex_bg[c]) ) {
return NULL ;
}
}
}
else {
return NULL ;
}
Colormap colormap ;
XColor fg_color, bg_color ;
GC ret=XCreateGC(display,win,0,0) ;
colormap=DefaultColormap(display,0) ;
XParseColor(display,colormap,color_hex_fg,&fg_color) ;
XAllocColor(display,colormap,&fg_color) ;
XSetForeground(display,ret,fg_color.pixel) ;
XParseColor(display,colormap,color_hex_bg,&bg_color) ;
XAllocColor(display,colormap,&bg_color) ;
XSetBackground(display,ret,bg_color.pixel) ;
if (line_width || line_width || line_style || cap_style || join_style ) {
XSetLineAttributes(display, ret, line_width, line_style, cap_style, join_style) ;
if ( line_style ) {
if ( line_style == LineOnOffDash || line_style == LineDoubleDash ) {
XSetDashes(display,ret, dash_offset, dash_list, nun_elt_dash_list) ;
/**
* dash_offset Specifies the phase of the pattern for the dashed line-style you want to set for the specified GC.
* dash_list Specifies the dash-list for the dashed line-style you want to set for the specified GC.
* nun_elt_dash_list Specifies the number of elements in dash_list.
**/
if ( fill_style ) {
XSetFillStyle(display, ret, fill_style) ;
if (fill_style == FillTiled ) {
/** The tile and GC must have the same depth, or a BadMatch error results. */
XSetTile(display, ret, tile) ;
}
if (fill_style == FillStippled || fill_style == FillOpaqueStippled) {
XSetStipple(display, ret, stipple) ;
/**
* When drawing lines with line-style LineDoubleDash, the odd dashes are controlled by the fill-style in the following manner:
* FillSolid Background
* FillTiled Same as for even dashes
* FillOpaqueStippled Same as for even dashes
* FillStippled Background masked by stipple
* */
}
}
}
}
}
return ret ;
}
GC get_simple_line_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,unsigned int line_width, int line_style, int cap_style, int join_style) {
/**
* This function return an GC (Graphic Context) for solid line drawing.
*
* display an pointer on the display.
* win the window to draw in.
*
* char *color_hex_fg; An hexadecimal formated string representing the foreground color of the GC (Graphic Context).
*
* char *color_hex_bg; An hexadecimal formated string representing the background color of the GC (Graphic Context).
*
* int line_width ; line width (in pixels)
*
* int line_style ; LineSolid, LineOnOffDash, LineDoubleDash
* The line-style defines which sections of a line are drawn:
* LineSolid The full path of the line is drawn.
* LineDoubleDash The full path of the line is drawn, but the even dashes are filled differently than the odd dashes (see fill-style) with
* CapButt style used where even and odd dashes meet.
* LineOnOffDash Only the even dashes are drawn, and cap-style applies to all internal ends of the individual dashes, except CapNotLast is treated as CapButt.
*
* int cap_style ; CapNotLast, CapButt, CapRound, CapProjecting
* The cap-style defines how the endpoints of a path are drawn:
* CapNotLast This is equivalent to CapButt except that for a line-width of zero the final endpoint is not drawn.
* CapButt The line is square at the endpoint (perpendicular to the slope of the line) with no projection beyond.
* CapRound The line has a circular arc with the diameter equal to the line-width, centered on the endpoint. (This is equivalent to CapButt for line-width of zero).
* CapProjecting The line is square at the end, but the path continues beyond the endpoint for a distance equal to half the line-width. (This is equivalent to CapButt for line-width of zero).
*
* int join_style ; JoinMiter, JoinRound, JoinBevel
* The join-style defines how corners are drawn for wide lines:
* JoinMiter The outer edges of two lines extend to meet at an angle. However, if the angle is less than 11 degrees, then a JoinBevel join-style is used instead.
* JoinRound The corner is a circular arc with the diameter equal to the line-width, centered on the joinpoint.
* JoinBevel The corner has CapButt endpoint styles with the triangular notch filled.
*
**/
if ( strlen(color_hex_fg) == 7 && strlen(color_hex_bg) == 7 ) {
int c ;
for (c=1 ; c < 7 ; c++) {
if (! isxdigit(color_hex_fg[c]) || ! isxdigit(color_hex_bg[c]) ) {
return NULL ;
}
}
}
else {
return NULL ;
}
Colormap colormap ;
XColor fg_color, bg_color ;
GC ret=XCreateGC(display,win,0,0) ;
colormap=DefaultColormap(display,0) ;
XParseColor(display,colormap,color_hex_fg,&fg_color) ;
XAllocColor(display,colormap,&fg_color) ;
XSetForeground(display,ret,fg_color.pixel) ;
XParseColor(display,colormap,color_hex_bg,&bg_color) ;
XAllocColor(display,colormap,&bg_color) ;
XSetBackground(display,ret,bg_color.pixel) ;
if (line_width || line_width || line_style || cap_style || join_style ) {
XSetLineAttributes(display, ret, line_width, line_style, cap_style, join_style) ;
}
return ret ;
}
GC get_simple_fill_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg) {
/**
* This function return an GC (Graphic Context) for filled form drawing.
*
* display an pointer on the display.
* win the window to draw in.
*
* char *color_hex_fg; An hexadecimal formated string representing the foreground color of the GC (Graphic Context).
*
* char *color_hex_bg; An hexadecimal formated string representing the background color of the GC (Graphic Context).
*
**/
if ( strlen(color_hex_fg) == 7 && strlen(color_hex_bg) == 7 ) {
int c ;
for (c=1 ; c < 7 ; c++) {
if (! isxdigit(color_hex_fg[c]) || ! isxdigit(color_hex_bg[c]) ) {
return NULL ;
}
}
}
else {
return NULL ;
}
Colormap colormap ;
XColor fg_color, bg_color ;
GC ret=XCreateGC(display,win,0,0) ;
colormap=DefaultColormap(display,0) ;
XParseColor(display,colormap,color_hex_fg,&fg_color) ;
XAllocColor(display,colormap,&fg_color) ;
XSetForeground(display,ret,fg_color.pixel) ;
XParseColor(display,colormap,color_hex_bg,&bg_color) ;
XAllocColor(display,colormap,&bg_color) ;
XSetBackground(display,ret,bg_color.pixel) ;
XSetFillStyle(display, ret, FillSolid) ;
return ret ;
}
GC get_pixmap_fill_gc(Display *display,Window win,char *color_hex_fg,char *color_hex_bg,int fill_style,Pixmap tile, Pixmap stipple) {
/**
* This function return an GC (Graphic Context) for pixmap filled form drawing.
*
* display an pointer on the display.
* win the window to draw in.
*
* char *color_hex_fg; An hexadecimal formated string representing the foreground color of the GC (Graphic Context).
*
* char *color_hex_bg; An hexadecimal formated string representing the background color of the GC (Graphic Context).
*
* int fill_style ; FillSolid Foreground
* FillTiled Tile
* FillOpaqueStippled A tile with the same width and height as stipple, but with background everywhere stipple has a zero and with foreground everywhere stipple has a one
* FillStippled Foreground masked by stipple
*
* Pixmap tile an Pixmap image:
* Pixmap stipple
* unsigned int pixmap_width, pixmap_height ;
* int icon_hot_width, icon_hot_height ;
* Pixmap pixmap_bits ;
* XReadBitmapFile(display, win, "/path/to/pixmap_file.xbm", &pixmap_width, &pixmap_height, &pixmap_bits, &pixmap_hot_width, &pixmap_hot_height) ;
*
* * The mechanic of pixmap image is that the white pixels are set in the color of the GC (Graphic Context) foreground color ;
* * The mechanic of pixmap image is that the black pixels are set in the color of the GC (Graphic Context) background color ;
*
* // Use XCopyPlane(display, pixmap_bits, win, gc, 0, 0, pixmap_width, pixmap_height, pos_x, pos_y, 1) ; to display it.
**/
if ( strlen(color_hex_fg) == 7 && strlen(color_hex_bg) == 7 ) {
int c ;
for (c=1 ; c < 7 ; c++) {
if (! isxdigit(color_hex_fg[c]) || ! isxdigit(color_hex_bg[c]) ) {
return NULL ;
}
}
}
else {
return NULL ;
}
Colormap colormap ;
XColor fg_color, bg_color ;
GC ret=XCreateGC(display,win,0,0) ;
colormap=DefaultColormap(display,0) ;
XParseColor(display,colormap,color_hex_fg,&fg_color) ;
XAllocColor(display,colormap,&fg_color) ;
XSetForeground(display,ret,fg_color.pixel) ;
XParseColor(display,colormap,color_hex_bg,&bg_color) ;
XAllocColor(display,colormap,&bg_color) ;
XSetBackground(display,ret,bg_color.pixel) ;
if ( fill_style ) {
XSetFillStyle(display, ret, fill_style) ;
if (fill_style == FillTiled ) {
/** The tile and GC must have the same depth, or a BadMatch error results. */
XSetTile(display, ret, tile) ;
}
else if (fill_style == FillStippled ) {
XSetStipple(display, ret, stipple) ;
}
}
return ret ;
} |
Générateur de Contexte Graphique GC [Xlib].
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