Attachment 3152 Details for Bug 4339 – a test case

a test case

test_xlib.c (text/plain), 3.31 KB, created by Steve Chaplin on 2005-09-02 02:20:57 UTC

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Creator: Steve Chaplin

Created: 2005-09-02 02:20:57 UTC

Size: 3.31 KB

patch

obsolete

>// gcc `pkg-config --cflags --libs cairo` test_template.c -o test_template
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <math.h>
>
>#include <cairo.h>
>#include <cairo-xlib.h>
>
>typedef struct win {
>    Display *dpy;
>    int scr;
>
>    Window win;
>    GC gc;
>
>    int width, height;
>    KeyCode quit_code;
>} win_t;
>
>static void win_init(win_t *win);
>static void win_deinit(win_t *win);
>static void win_draw(win_t *win);
>static void win_handle_events(win_t *win);
>
>int
>main(int argc, char *argv[])
>{
>    win_t win;
>
>    /* do png backend */
>    png_draw();
>
>    /* do xlib backend */
>    win.dpy = XOpenDisplay(0);
>
>    if (win.dpy == NULL) {
>	fprintf(stderr, "Failed to open display\n");
>	return 1;
>    }
>
>    win_init(&win);
>
>    win_draw(&win);
>
>    win_handle_events(&win);
>
>    win_deinit(&win);
>
>    XCloseDisplay(win.dpy);
>
>    return 0;
>}
>
>void
>draw (cairo_t *cr, int width, int height)
>{
>    cairo_scale (cr, width, height);
>
>    cairo_select_font_face (cr, "Sans", CAIRO_FONT_SLANT_NORMAL,
>			    CAIRO_FONT_WEIGHT_BOLD);
>    /* cairo_set_font_size (cr, 0.3); */
>
>    cairo_move_to (cr, 0.05, 0.5);
>    cairo_set_source_rgb (cr, 1, 0, 0);
>    cairo_show_text (cr, "Hello");
>}
>
>int
>png_draw ()
>{
>  int width = 400, height = 400;
>  cairo_t *cr;
>  cairo_surface_t *surface;
>
>  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
>  cr = cairo_create (surface);
>
>  draw (cr, width, height);
>
>  cairo_surface_write_to_png (surface, "test.png");
>
>  if (cairo_status (cr)) {
>    printf("Cairo is unhappy: %s\n",
>	   cairo_status_to_string (cairo_status (cr)));
>    exit(0);
>  }
>
>  cairo_surface_destroy (surface);
>  cairo_destroy (cr);
>
>  return 0;
>}
>
>static void
>win_draw(win_t *win)
>{
>    cairo_surface_t *surface;
>    cairo_t *cr;
>    Visual *visual = DefaultVisual(win->dpy, DefaultScreen (win->dpy));
>
>    XClearWindow(win->dpy, win->win);
>
>    surface = cairo_xlib_surface_create (win->dpy, win->win, visual,
>					 win->width, win->height);
>    cr = cairo_create(surface);
>
>    draw (cr, win->width, win->height);
>
>    if (cairo_status (cr)) {
>	printf("Cairo is unhappy: %s\n",
>	       cairo_status_to_string (cairo_status (cr)));
>	exit(0);
>    }
>
>    cairo_destroy(cr);
>    cairo_surface_destroy (surface);
>}
>
>static void
>win_init(win_t *win)
>{
>    Window root;
>
>    win->width = 400;
>    win->height = 400;
>
>    root = DefaultRootWindow(win->dpy);
>    win->scr = DefaultScreen(win->dpy);
>
>    win->win = XCreateSimpleWindow(win->dpy, root, 0, 0,
>				   win->width, win->height, 0,
>				   BlackPixel(win->dpy, win->scr), BlackPixel(win->dpy, win->scr));
>
>    win->quit_code = XKeysymToKeycode(win->dpy, XStringToKeysym("Q"));
>
>    XSelectInput(win->dpy, win->win,
>		 KeyPressMask
>		 |StructureNotifyMask
>		 |ExposureMask);
>
>    XMapWindow(win->dpy, win->win);
>}
>
>static void
>win_deinit(win_t *win)
>{
>    XDestroyWindow(win->dpy, win->win);
>}
>
>static void
>win_handle_events(win_t *win)
>{
>    XEvent xev;
>
>    while (1) {
>	XNextEvent(win->dpy, &xev);
>	switch(xev.type) {
>	case KeyPress:
>	{
>	    XKeyEvent *kev = &xev.xkey;
>
>	    if (kev->keycode == win->quit_code) {
>		return;
>	    }
>	}
>	break;
>	case ConfigureNotify:
>	{
>	    XConfigureEvent *cev = &xev.xconfigure;
>
>	    win->width = cev->width;
>	    win->height = cev->height;
>	}
>	break;
>	case Expose:
>	{
>	    XExposeEvent *eev = &xev.xexpose;
>
>	    if (eev->count == 0)
>		win_draw(win);
>	}
>	break;
>	}
>    }
>}

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