/* * Copyright © 2008 Adrian Johnson * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Author: Adrian Johnson */ #include "cairo-test.h" #include #define TEXT_SIZE 12 typedef struct { cairo_glyph_t glyph_list[100]; int num_glyphs; double x; double y; } glyph_array_t; static void glyph_array_init (glyph_array_t *glyphs, double x, double y) { glyphs->num_glyphs = 0; glyphs->x = x; glyphs->y = y; } static void glyph_array_rel_move_to (glyph_array_t *glyphs, double x, double y) { glyphs->x += x; glyphs->y += y; } static void glyph_array_show (glyph_array_t *glyphs, cairo_t *cr) { cairo_show_glyphs (cr, glyphs->glyph_list, glyphs->num_glyphs); } #define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0) static cairo_status_t glyph_array_add_text(glyph_array_t *glyphs, cairo_t *cr, const char *s, double spacing) { cairo_scaled_font_t *scaled_font; cairo_status_t status; FT_Face face; unsigned long charcode; unsigned int index; cairo_text_extents_t extents; const char *p; FT_Vector kerning; double kern_x; int first = TRUE; scaled_font = cairo_get_scaled_font (cr); status = cairo_scaled_font_status (scaled_font); if (status) return status; face = cairo_ft_scaled_font_lock_face (scaled_font); if (face == NULL) return CAIRO_STATUS_FONT_TYPE_MISMATCH; p = s; while (*p) { charcode = *p; index = FT_Get_Char_Index (face, charcode); glyphs->glyph_list[glyphs->num_glyphs].index = index; if (first) { first = FALSE; glyphs->glyph_list[glyphs->num_glyphs].x = glyphs->x; glyphs->glyph_list[glyphs->num_glyphs].y = glyphs->y; } else { cairo_glyph_extents (cr, &glyphs->glyph_list[glyphs->num_glyphs - 1], 1, &extents); FT_Get_Kerning (face, glyphs->glyph_list[glyphs->num_glyphs - 1].index, glyphs->glyph_list[glyphs->num_glyphs].index, FT_KERNING_UNSCALED, &kerning); kern_x = DOUBLE_FROM_26_6(kerning.x); glyphs->glyph_list[glyphs->num_glyphs].x = glyphs->glyph_list[glyphs->num_glyphs - 1].x + extents.x_advance + kern_x + spacing; glyphs->glyph_list[glyphs->num_glyphs].y = glyphs->glyph_list[glyphs->num_glyphs - 1].y + extents.y_advance; } cairo_glyph_extents (cr, &glyphs->glyph_list[glyphs->num_glyphs], 1, &extents); glyphs->x = glyphs->glyph_list[glyphs->num_glyphs].x + extents.x_advance + spacing; glyphs->y = glyphs->glyph_list[glyphs->num_glyphs].y + extents.y_advance; p++; glyphs->num_glyphs++; } cairo_ft_scaled_font_unlock_face (scaled_font); return CAIRO_STATUS_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); glyph_array_t glyphs; cairo_font_options_t *font_options; cairo_status_t status; /* paint white so we don't need separate ref images for * RGB24 and ARGB32 */ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); cairo_paint (cr); cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); cairo_set_font_size (cr, TEXT_SIZE); font_options = cairo_font_options_create (); cairo_get_font_options (cr, font_options); cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF); cairo_set_font_options (cr, font_options); cairo_font_options_destroy (font_options); cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); glyph_array_init (&glyphs, 1, TEXT_SIZE); status = glyph_array_add_text(&glyphs, cr, "AWAY again", 0.0); if (status) return cairo_test_status_from_status (ctx, status); glyph_array_rel_move_to (&glyphs, TEXT_SIZE*1, 0.0); status = glyph_array_add_text(&glyphs, cr, "character space", TEXT_SIZE*0.3); if (status) return cairo_test_status_from_status (ctx, status); glyph_array_show (&glyphs, cr); glyph_array_init (&glyphs, 1, TEXT_SIZE*2 + 4); status = glyph_array_add_text(&glyphs, cr, "Increasing", 0.0); if (status) return cairo_test_status_from_status (ctx, status); glyph_array_rel_move_to (&glyphs, TEXT_SIZE*0.5, 0.0); status = glyph_array_add_text(&glyphs, cr, "space", 0.0); if (status) return cairo_test_status_from_status (ctx, status); glyph_array_rel_move_to (&glyphs, TEXT_SIZE*1.0, 0.0); status = glyph_array_add_text(&glyphs, cr, "between", 0.0); if (status) return cairo_test_status_from_status (ctx, status); glyph_array_rel_move_to (&glyphs, TEXT_SIZE*1.5, 0.0); status = glyph_array_add_text(&glyphs, cr, "words", 0.0); if (status) return cairo_test_status_from_status (ctx, status); glyph_array_show (&glyphs, cr); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (ft_show_glyphs_positioning, "Test that the PS/PDF glyph positioning optimizations are correct", "ft, text", /* keywords */ NULL, /* requirements */ 235, (TEXT_SIZE + 4)*2, NULL, draw)