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Diffstat (limited to 'test/show-glyphs-many.c')
| -rw-r--r-- | test/show-glyphs-many.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/test/show-glyphs-many.c b/test/show-glyphs-many.c deleted file mode 100644 index f689fe080..000000000 --- a/test/show-glyphs-many.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * 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 -get_glyph (const cairo_test_context_t *ctx, - 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; - - text_to_glyphs = glyph; - i = 1; - status = cairo_scaled_font_text_to_glyphs (scaled_font, - 0, 0, - utf8, -1, - &text_to_glyphs, &i, - NULL, NULL, - 0); - if (status != CAIRO_STATUS_SUCCESS) - return cairo_test_status_from_status (ctx, status); - - if (text_to_glyphs != glyph) { - *glyph = text_to_glyphs[0]; - cairo_glyph_free (text_to_glyphs); - } - - return CAIRO_TEST_SUCCESS; -} - -static cairo_test_status_t -draw (cairo_t *cr, int width, int height) -{ - const cairo_test_context_t *ctx = cairo_test_get_context (cr); - cairo_glyph_t *glyphs = xmalloc (NUM_GLYPHS * sizeof (cairo_glyph_t)); - cairo_scaled_font_t *scaled_font; - const char *characters[] = { /* try to exercise different widths of index */ - "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_set_source_rgb (cr, 1, 1, 1); - cairo_paint (cr); - - cairo_select_font_face (cr, "Sans", - CAIRO_FONT_SLANT_NORMAL, - CAIRO_FONT_WEIGHT_NORMAL); - cairo_set_font_size (cr, TEXT_SIZE); - scaled_font = cairo_get_scaled_font (cr); - - for (utf8 = characters; *utf8 != NULL; utf8++) { - status = get_glyph (ctx, scaled_font, *utf8, &glyphs[0]); - if (status) - goto BAIL; - - if (glyphs[0].index) { - glyphs[0].x = 1.0; - glyphs[0].y = height - 1; - for (i=1; i < NUM_GLYPHS; i++) - glyphs[i] = glyphs[0]; - - cairo_show_glyphs (cr, glyphs, NUM_GLYPHS); - } - } - - /* we can pack ~21k 1-byte glyphs into a single XRenderCompositeGlyphs8 */ - status = get_glyph (ctx, scaled_font, "m", &glyphs[0]); - if (status) - goto BAIL; - for (i=1; i < 21500; i++) - glyphs[i] = glyphs[0]; - /* so check expanding the current 1-byte request for 2-byte glyphs */ - status = get_glyph (ctx, scaled_font, "μ", &glyphs[i]); - if (status) - goto BAIL; - for (j=i+1; j < NUM_GLYPHS; j++) - glyphs[j] = glyphs[i]; - - cairo_show_glyphs (cr, glyphs, NUM_GLYPHS); - - BAIL: - free(glyphs); - - return status; -} - -CAIRO_TEST (show_glyphs_many, - "Test that cairo_show_glyphs works when handed 'many' glyphs", - "text, stress", /* keywords */ - NULL, /* requirements */ - 9, 11, - NULL, draw) |