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Diffstat (limited to 'test/user-font.c')
| -rw-r--r-- | test/user-font.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/test/user-font.c b/test/user-font.c new file mode 100644 index 000000000..435d5616f --- /dev/null +++ b/test/user-font.c @@ -0,0 +1,267 @@ +/* + * Copyright © 2006, 2008 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. + * + * Contributor(s): + * Kristian Høgsberg <krh@redhat.com> + * Behdad Esfahbod <behdad@behdad.org> + */ + +#include "cairo-test.h" + +#include <stdlib.h> +#include <stdio.h> + +/*#define ROTATED 1*/ + +#define BORDER 10 +#define TEXT_SIZE 64 +#define WIDTH (TEXT_SIZE * 15 + 2*BORDER) +#ifndef ROTATED + #define HEIGHT ((TEXT_SIZE + 2*BORDER)*2) +#else + #define HEIGHT WIDTH +#endif +#define TEXT "geez... cairo user-font" + +#define END_GLYPH 0 +#define STROKE 126 +#define CLOSE 127 + +/* Simple glyph definition: 1 - 15 means lineto (or moveto for first + * point) for one of the points on this grid: + * + * 1 2 3 + * 4 5 6 + * 7 8 9 + * ----10 11 12----(baseline) + * 13 14 15 + */ +typedef struct { + unsigned long ucs4; + int width; + char data[16]; +} test_scaled_font_glyph_t; + +static cairo_user_data_key_t test_font_face_glyphs_key; + +static cairo_status_t +test_scaled_font_init (cairo_scaled_font_t *scaled_font, + cairo_t *cr, + cairo_font_extents_t *metrics) +{ + metrics->ascent = .75; + metrics->descent = .25; + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +test_scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font, + unsigned long unicode, + unsigned long *glyph) +{ + test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font), + &test_font_face_glyphs_key); + int i; + + for (i = 0; glyphs[i].ucs4 != (unsigned long) -1; i++) + if (glyphs[i].ucs4 == unicode) { + *glyph = i; + return CAIRO_STATUS_SUCCESS; + } + + /* Not found. Default to glyph 0 */ + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +test_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font, + unsigned long glyph, + cairo_t *cr, + cairo_text_extents_t *metrics) +{ + test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font), + &test_font_face_glyphs_key); + int i; + const char *data; + div_t d; + double x, y; + + /* FIXME: We simply crash on out-of-bound glyph indices */ + + metrics->x_advance = glyphs[glyph].width / 4.0; + + cairo_set_line_width (cr, 0.1); + cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); + cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); + + data = glyphs[glyph].data; + for (i = 0; data[i] != END_GLYPH; i++) { + switch (data[i]) { + case STROKE: + cairo_new_sub_path (cr); + break; + + case CLOSE: + cairo_close_path (cr); + break; + + default: + d = div (data[i] - 1, 3); + x = d.rem / 4.0 + 0.125; + y = d.quot / 5.0 + 0.4 - 1.0; + cairo_line_to (cr, x, y); + } + } + cairo_stroke (cr); + + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_user_font_face_create (cairo_font_face_t **out) +{ + /* Simple glyph definition: 1 - 15 means lineto (or moveto for first + * point) for one of the points on this grid: + * + * 1 2 3 + * 4 5 6 + * 7 8 9 + * ----10 11 12----(baseline) + * 13 14 15 + */ + static const test_scaled_font_glyph_t glyphs [] = { + { 'a', 3, { 4, 6, 12, 10, 7, 9, STROKE, END_GLYPH } }, + { 'c', 3, { 6, 4, 10, 12, STROKE, END_GLYPH } }, + { 'e', 3, { 12, 10, 4, 6, 9, 7, STROKE, END_GLYPH } }, + { 'f', 3, { 3, 2, 11, STROKE, 4, 6, STROKE, END_GLYPH } }, + { 'g', 3, { 12, 10, 4, 6, 15, 13, STROKE, END_GLYPH } }, + { 'h', 3, { 1, 10, STROKE, 7, 5, 6, 12, STROKE, END_GLYPH } }, + { 'i', 1, { 1, 1, STROKE, 4, 10, STROKE, END_GLYPH } }, + { 'l', 1, { 1, 10, STROKE, END_GLYPH } }, + { 'n', 3, { 10, 4, STROKE, 7, 5, 6, 12, STROKE, END_GLYPH } }, + { 'o', 3, { 4, 10, 12, 6, CLOSE, END_GLYPH } }, + { 'r', 3, { 4, 10, STROKE, 7, 5, 6, STROKE, END_GLYPH } }, + { 's', 3, { 6, 4, 7, 9, 12, 10, STROKE, END_GLYPH } }, + { 't', 3, { 2, 11, 12, STROKE, 4, 6, STROKE, END_GLYPH } }, + { 'u', 3, { 4, 10, 12, 6, STROKE, END_GLYPH } }, + { 'z', 3, { 4, 6, 10, 12, STROKE, END_GLYPH } }, + { ' ', 1, { END_GLYPH } }, + { '-', 2, { 7, 8, STROKE, END_GLYPH } }, + { '.', 1, { 10, 10, STROKE, END_GLYPH } }, + { -1, 0, { END_GLYPH } }, + }; + + cairo_font_face_t *user_font_face; + cairo_status_t status; + + user_font_face = cairo_user_font_face_create (); + cairo_user_font_face_set_init_func (user_font_face, test_scaled_font_init); + cairo_user_font_face_set_render_glyph_func (user_font_face, test_scaled_font_render_glyph); + cairo_user_font_face_set_unicode_to_glyph_func (user_font_face, test_scaled_font_unicode_to_glyph); + + status = cairo_font_face_set_user_data (user_font_face, + &test_font_face_glyphs_key, + (void*) glyphs, NULL); + if (status) { + cairo_font_face_destroy (user_font_face); + return status; + } + + *out = user_font_face; + return CAIRO_STATUS_SUCCESS; +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_font_face_t *font_face; + const char text[] = TEXT; + cairo_font_extents_t font_extents; + cairo_text_extents_t extents; + cairo_status_t status; + + cairo_set_source_rgb (cr, 1, 1, 1); + cairo_paint (cr); + +#ifdef ROTATED + cairo_translate (cr, TEXT_SIZE, 0); + cairo_rotate (cr, .6); +#endif + + status = _user_font_face_create (&font_face); + if (status) { + return cairo_test_status_from_status (cairo_test_get_context (cr), + status); + } + + cairo_set_font_face (cr, font_face); + cairo_font_face_destroy (font_face); + + cairo_set_font_size (cr, TEXT_SIZE); + + cairo_font_extents (cr, &font_extents); + cairo_text_extents (cr, text, &extents); + + /* logical boundaries in red */ + cairo_move_to (cr, 0, BORDER); + cairo_rel_line_to (cr, WIDTH, 0); + cairo_move_to (cr, 0, BORDER + font_extents.ascent); + cairo_rel_line_to (cr, WIDTH, 0); + cairo_move_to (cr, 0, BORDER + font_extents.ascent + font_extents.descent); + cairo_rel_line_to (cr, WIDTH, 0); + cairo_move_to (cr, BORDER, 0); + cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE); + cairo_move_to (cr, BORDER + extents.x_advance, 0); + cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE); + cairo_set_source_rgb (cr, 1, 0, 0); + cairo_set_line_width (cr, 2); + cairo_stroke (cr); + + /* ink boundaries in green */ + cairo_rectangle (cr, + BORDER + extents.x_bearing, BORDER + font_extents.ascent + extents.y_bearing, + extents.width, extents.height); + cairo_set_source_rgb (cr, 0, 1, 0); + cairo_set_line_width (cr, 2); + cairo_stroke (cr); + + /* text in black */ + cairo_set_source_rgb (cr, 0, 0, 0); + cairo_move_to (cr, BORDER, BORDER + font_extents.ascent); + cairo_show_text (cr, text); + + + /* filled version of text in blue */ + cairo_set_source_rgb (cr, 0, 0, 1); + cairo_move_to (cr, BORDER, BORDER + font_extents.height + 2*BORDER + font_extents.ascent); + cairo_text_path (cr, text); + cairo_fill (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (user_font, + "Tests user font feature", + "font, user-font", /* keywords */ + "cairo >= 1.7.4", /* requirements */ + WIDTH, HEIGHT, + NULL, draw) |