/*

 * Copyright © 2006 Red Hat, Inc.

 *

 * Permission to use, copy, modify, distribute, and sell this software

 * and its documentation for any purpose is hereby granted without

 * fee, provided that the above copyright notice appear in all copies

 * and that both that copyright notice and this permission notice

 * appear in supporting documentation, and that the name of

 * Red Hat, Inc. not be used in advertising or publicity pertaining to

 * distribution of the software without specific, written prior

 * permission. Red Hat, Inc. makes no representations about the

 * suitability of this software for any purpose.  It is provided "as

 * is" without express or implied warranty.

 *

 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

 * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,

 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER

 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION

 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR

 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 *

 * Author: Carl D. Worth <cworth@cworth.org>

 */

#include "cairo-test.h"

#include <string.h>

/* Bug history

 *

 * 2006-01-07  Jon Hellan  <hellan@acm.org>

 *

 *   Jon opened the following bug report:

 *

 *	_XError from XRenderCompositeText8

 *	https://bugs.freedesktop.org/show_bug.cgi?id=5528

 *

 * 2006-03-02  Carl Worth  <cworth@cworth.org>

 *

 *   I wrote this test case to demonstrate the bug.

 *

 *   Approach:

 *

 *	Draw 65535 glyphs white-on-white all on top of each other.

 *

 *   Rationale:

 *

 *	The number 65535 comes from the original bug report.

 *

 *	I would use cairo_show_text with a long string of 'x's say,

 *	but then the surface would need to be enormous to contain

 *	them. A smaller surface could be used, but I fear that at some

 *	point the off-surface glyph drawing would be optimized away

 *	and not exercise the bug.

 *

 *	So, to keep the surface size under control, I use

 *	cairo_show_glyphs which allows me to place the glyphs all on

 *	top of each other. But, since cairo doesn't provide any

 *	character-to-glyphs mapping, I can't get a reliable glyph

 *	index (for character 'x' for example). So I just "guess" a

 *	glyph index and use white-on-white drawing to ignore the

 *	result. (I don't care what's drawn---I just want to ensure

 *	that things don't crash.)

 *

 *  Status: I replicated bug. The largest value of NUM_GLYPHS for

 *      which I saw success is 21842.

 *

 * 2008-30-08 Chris Wilson <chris@chris-wilson.co.uk>

 *   This is also a valid test case for:

 *

 *     Bug 5913 crash on overlong string

 *     https://bugs.freedesktop.org/show_bug.cgi?id=5913

 *

 *  which is still causing a crash in the Xlib backend - presumably, just

 *  a miscalculation of the length of the available request.

 */

#define TEXT_SIZE 12

#define NUM_GLYPHS 65535

static cairo_test_status_t

	   cairo_scaled_font_t *scaled_font,

	   const char *utf8,

	   cairo_glyph_t *glyph)

{

    cairo_glyph_t *text_to_glyphs;

    cairo_status_t status;

    int i;

					       0, 0,

					       utf8, -1,

					       &text_to_glyphs, &i,

					       NULL, NULL,

					       0);

    }

}

static cairo_test_status_t

{

    cairo_scaled_font_t *scaled_font;

	"m", /* Latin letter m, index=0x50 */

	"μ", /* Greek letter mu, index=0x349 */

	NULL,

    }, **utf8;

    int i, j;

    cairo_status_t status;

    /* Paint white background. */

			    CAIRO_FONT_SLANT_NORMAL,

			    CAIRO_FONT_WEIGHT_NORMAL);

	}

    }

    /* we can pack ~21k 1-byte glyphs into a single XRenderCompositeGlyphs8 */

    /* so check expanding the current 1-byte request for 2-byte glyphs */

}

	    "Test that cairo_show_glyphs works when handed 'many' glyphs",

	    "text, stress", /* keywords */

	    NULL, /* requirements */

	    9, 11,

	    NULL, draw)