Attachment 118021 Details for Bug 91829 – Compile with gcc -I/usr/include/freetype2 -I/usr/include/cairo cairo_xlib_simple.c -lcairo -lX11 -lfreetype

Compile with gcc -I/usr/include/freetype2 -I/usr/include/cairo cairo_xlib_simple.c -lcairo -lX11 -lfreetype

cairo_xlib_simple.c (text/plain), 3.45 KB, created by Jethro Beekman on 2015-08-31 20:23:33 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Jethro Beekman

Created: 2015-08-31 20:23:33 UTC

Size: 3.45 KB

patch

obsolete

>#include <X11/Xlib.h>
>#include <X11/Xatom.h>
>#include <X11/Xutil.h>
>#include <cairo.h>
>#include <cairo-xlib.h>
>#include <ft2build.h>
>#include <freetype.h>
>
>#include <stdio.h>
>#include <stdlib.h>
>
>/*! Simple Cairo/Xlib example.
> * @author Bernhard R. Fischer, 2048R/5C5FFD47 <bf@abenteuerland.at>.
> * @version 2014110801
> * Compile with
> * gcc -Wall $(pkg-config --libs --cflags cairo x11) -o cairo_xlib_simple cairo_xlib_simple.c
> */
>
>/*! Check for Xlib Mouse/Keypress events. All other events are discarded.
> * @param sfc Pointer to Xlib surface.
> * @param block If block is set to 0, this function always returns immediately
> * and does not block. if set to a non-zero value, the function will block
> * until the next event is received.
> * @return The function returns 0 if no event occured (and block is set). A
> * positive value indicates that a key was pressed and the X11 key symbol as
> * defined in <X11/keysymdef.h> is returned. A negative value indicates a mouse
> * button event. -1 is button 1 (left button), -2 is the middle button, and -3
> * the right button.
> */
>int cairo_check_event(cairo_surface_t *sfc, int block)
>{
>	char keybuf[8];
>	KeySym key;
>	XEvent e;
>
>	for (;;)
>	{
>		if (block || XPending(cairo_xlib_surface_get_display(sfc)))
>			XNextEvent(cairo_xlib_surface_get_display(sfc), &e);
>		else
>			return 0;
>
>		switch (e.type)
>		{
>		case ButtonPress:
>			return -e.xbutton.button;
>		case KeyPress:
>			XLookupString(&e.xkey, keybuf, sizeof(keybuf), &key, NULL);
>			return key;
>		default:
>			fprintf(stderr, "Dropping unhandled XEevent.type = %d.\n", e.type);
>		}
>	}
>}
>
>
>/*! Open an X11 window and create a cairo surface base on that window.
> * @param x Width of window.
> * @param y Height of window.
> * @return Returns a pointer to a valid Xlib cairo surface. The function does
> * not return on error (exit(3)).
> */
>cairo_surface_t *cairo_create_x11_surface0(int x, int y)
>{
>	Display *dsp;
>	Drawable da;
>	int screen;
>	cairo_surface_t *sfc;
>
>	if ((dsp = XOpenDisplay(NULL)) == NULL)
>		exit(1);
>	screen = DefaultScreen(dsp);
>	da = XCreateSimpleWindow(dsp, DefaultRootWindow(dsp), 0, 0, x, y, 0, 0, 0);
>	XSelectInput(dsp, da, ButtonPressMask | KeyPressMask);
>	XMapWindow(dsp, da);
>
>	sfc = cairo_xlib_surface_create(dsp, da, DefaultVisual(dsp, screen), x, y);
>	cairo_xlib_surface_set_size(sfc, x, y);
>
>	return sfc;
>}
>
>
>/*! Destroy cairo Xlib surface and close X connection.
> */
>void cairo_close_x11_surface(cairo_surface_t *sfc)
>{
>	Display *dsp = cairo_xlib_surface_get_display(sfc);
>
>	cairo_surface_destroy(sfc);
>	XCloseDisplay(dsp);
>}
>
>static int sizes[]= {8,10,12,16,18,24,36,48,60,72,84,96};
>
>int main(int argc, char **argv)
>{
>	cairo_surface_t *sfc;
>	cairo_t *ctx;
>
>	sfc = cairo_create_x11_surface0(700, 400);
>
>	ctx = cairo_create(sfc);
>	cairo_set_source_rgb(ctx, 1, 1, 1);
>	cairo_paint(ctx);
>
>	FT_Library lib;
>	FT_Init_FreeType(&lib);
>	FT_Face ft_face;
>	FT_New_Face(lib,"cmex10.otf",0,&ft_face);
>
>	cairo_font_face_t *font_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0);
>
>	cairo_set_source_rgb(ctx, 0, 0, 0);
>
>	int i;
>	for (i=0; i<12; i++)
>	{
>
>		cairo_move_to (ctx, 5+100*(i%6), 20+80*(i/6));
>
>		cairo_select_font_face(ctx,"sans-serif",CAIRO_FONT_SLANT_NORMAL,CAIRO_FONT_WEIGHT_NORMAL);
>		cairo_set_font_size (ctx, 8);
>		char size[3];
>		sprintf(size,"%d",sizes[i]);
>		cairo_show_text(ctx,size);
>
>		cairo_set_font_face (ctx, font_face);
>		cairo_set_font_size (ctx, sizes[i]);
>		cairo_show_text(ctx,"r");
>	}
>
>	cairo_destroy(ctx);
>
>	cairo_check_event(sfc, 1);
>
>	cairo_close_x11_surface(sfc);
>
>	return 0;
>}
>

Actions: View

Attachments on bug 91829: 118021 | 118022 | 118023 | 118024 | 118025 | 118026 | 118032

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.