Attachment 6359 Details for Bug 7494 – Simple test case to demonstrate the bug

Simple test case to demonstrate the bug

testcase-7494.c (text/plain), 2.76 KB, created by Carl Worth on 2006-07-26 23:28:21 UTC

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Creator: Carl Worth

Created: 2006-07-26 23:28:21 UTC

Size: 2.76 KB

patch

obsolete

>/* gcc `pkg-config --cflags --libs cairo` testcase-7494.c -o testcase-7494 */
>#include <stdio.h>
>#include <stdlib.h>
>
>#include <cairo.h>
>#include <cairo-xlib.h>
>
>/* This is a simple test case for demonstrating cairo bug #7494:
> *
> *	With cairo 1.2.0, non-antialiased xlib text doesn't appear after first space
> *	https://bugs.freedesktop.org/show_bug.cgi?id=7494
> *
> * This testcase simply uses the default font, but disables
> * antialiasing to demonstrate bug #7494. The correct behavior would
> * be for both of the characters "a" and "b" to appear. The buggy
> * behavior is that only the character "a" appears.
> */
>
>static void
>draw (cairo_t *cr, int width, int height)
>{
>    cairo_font_options_t *font_options;
>
>    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
>    cairo_paint (cr);
>    cairo_move_to (cr, 20, 20);
>    cairo_set_font_size (cr, 12);
>    font_options = cairo_font_options_create ();
>    cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_NONE);
>    cairo_set_font_options (cr, font_options);
>    cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
>    cairo_show_text (cr, "a b");
>}
>
>static void
>xlib_draw (Display *dpy, Window window, int width, int height)
>{
>    cairo_surface_t *surface;
>    cairo_t *cr;
>
>    surface = cairo_xlib_surface_create (dpy, window,
>					 DefaultVisual (dpy, DefaultScreen (dpy)),
>					 width, height);
>    cr = cairo_create (surface);
>
>    draw (cr, width, 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
>handle_events(Display *dpy, Window window, int width, int height)
>{
>    XEvent xev;
>    KeyCode quit_code = XKeysymToKeycode (dpy, XStringToKeysym("Q"));
>
>    while (1) {
>	XNextEvent (dpy, &xev);
>	switch (xev.type) {
>	case KeyPress:
>	    if (xev.xkey.keycode == quit_code)
>		return;
>	break;
>	case ConfigureNotify:
>	    width = xev.xconfigure.width;
>	    height = xev.xconfigure.height;
>	break;
>	case Expose:
>	    if (xev.xexpose.count == 0)
>		xlib_draw (dpy, window, width, height);
>	break;
>	}
>    }
>}
>
>int
>main (int argc, char *argv[])
>{
>    Display *dpy;
>    Window root, window;
>    int width = 400, height = 400;
>
>    dpy = XOpenDisplay (NULL);
>
>    if (dpy == NULL) {
>	fprintf(stderr, "Failed to open display %s\n", XDisplayName(NULL));
>	return 1;
>    }
>
>    window = XCreateSimpleWindow(dpy, DefaultRootWindow (dpy),
>				 0, 0, width, height, 0,
>				 WhitePixel(dpy, DefaultScreen (dpy)),
>				 WhitePixel(dpy, DefaultScreen (dpy)));
>
>    XSelectInput(dpy, window,
>		 KeyPressMask | StructureNotifyMask | ExposureMask);
>
>    XMapWindow (dpy, window);
>
>    handle_events (dpy, window, width, height);
>
>    XDestroyWindow (dpy, window);
>    XCloseDisplay (dpy);
>
>    return 0;
>}

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Attachments on bug 7494: 6319 | 6320 | 6321 | 6354 | 6359 | 6360

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