/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */ /* cairo - a vector graphics library with display and print output * * Copyright © 2006 Brian Ewins. * * 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 * Brian Ewins not be used in advertising or publicity pertaining to * distribution of the software without specific, written prior * permission. Brian Ewins makes no representations about the * suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * BRIAN EWINS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL BRIAN EWINS 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: Brian Ewins <Brian.Ewins@gmail.com> */ /* Related to bug 9530 * * cairo_glyph_t can contain any unsigned long in its 'index', the intention * being that it is large enough to hold a pointer. However, this means that * it can specify many glyph indexes which don't exist in the font, and may * exceed the range of legal glyph indexes for the font backend. It may * also contain special values that are not usable as indexes - e.g. 0xffff is * kATSDeletedGlyphcode in ATSUI, a glyph that should not be drawn. * The font backends should handle all legal and out-of-range values * consistently. * * This test expects that operations on out-of-range and missing glyphs should * act as if they were zero-width. */ #include "cairo-test.h" #define WIDTH 100 #define HEIGHT 75 #define NUM_TEXT 20 #define TEXT_SIZE 12 static cairo_test_status_t draw (cairo_t *cr, int width, int height) { cairo_text_extents_t extents; int i; /* Glyphs with no paths followed by 'cairo', the additional * text is to make the space obvious. */ long int index[] = { 0, /* 'no matching glyph' */ 0xffff, /* kATSDeletedGlyphCode */ 0x1ffff, /* out of range */ -1L, /* out of range */ 70, 68, 76, 85, 82 /* 'cairo' */ }; /* We draw in the default black, so paint white first. */ cairo_save (cr); cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */ cairo_paint (cr); cairo_restore (cr); cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); cairo_set_font_size (cr, 16); for (i = 0; i < 9; i++) { /* since we're just drawing glyphs directly we need to position them. */ cairo_glyph_t glyph = { index[i], 10 * i, 25 }; /* test cairo_glyph_extents. Every glyph index should * have extents, invalid glyphs should be zero-width. */ cairo_move_to (cr, glyph.x, glyph.y); cairo_set_line_width (cr, 1.0); cairo_glyph_extents (cr, &glyph, 1, &extents); cairo_rectangle (cr, glyph.x + extents.x_bearing - 0.5, glyph.y + extents.y_bearing - 0.5, extents.width + 1, extents.height + 1); cairo_set_source_rgb (cr, 1, 0, 0); /* red */ cairo_stroke (cr); /* test cairo_show_glyphs. Every glyph index should be * drawable, invalid glyph indexes should draw nothing. */ cairo_set_source_rgb (cr, 0, 0, 0); /* black */ cairo_show_glyphs (cr, &glyph, 1); cairo_move_to (cr, glyph.x, glyph.y); /* test cairo_glyph_path. Every glyph index should produce * a path, invalid glyph indexes should have empty paths. */ /* Change the glyph position * so that the paths are visible. */ glyph.y = 55; cairo_move_to (cr, glyph.x, glyph.y); cairo_glyph_path (cr, &glyph, 1); cairo_fill (cr); } return CAIRO_TEST_SUCCESS; } CAIRO_TEST (text_glyph_range, "Tests show_glyphs, glyph_path, glyph_extents with out of range glyph ids." "\nft and atsui font backends fail, misreporting errors from FT_Load_Glyph and ATSUGlyphGetCubicPaths", "text, stress", /* keywords */ NULL, /* requirements */ WIDTH, HEIGHT, NULL, draw)