diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/ft-show-glyphs-positioning.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/ft-show-glyphs-positioning.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/ft-show-glyphs-positioning.c b/libs/cairo-1.16.0/test/ft-show-glyphs-positioning.c new file mode 100644 index 0000000..449f8eb --- /dev/null +++ b/libs/cairo-1.16.0/test/ft-show-glyphs-positioning.c @@ -0,0 +1,191 @@ +/* + * 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 <ajohnson@redneon.com> + */ + +#include "cairo-test.h" +#include <cairo-ft.h> + +#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) |