/* * Copyright © 2006, 2008 Red Hat, Inc. * Copyright © 2021 Adrian Johnson * * 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 * Behdad Esfahbod */ /* Test that user-fonts can handle color and non-color glyphs in the * same font. */ #include "cairo-test.h" #include #include #define BORDER 10 #define TEXT_SIZE 64 #define WIDTH (TEXT_SIZE * 12 + 2*BORDER) #define HEIGHT (TEXT_SIZE + 2*BORDER) #define TEXT "abcdefghijkl" 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 void render_glyph_solid (cairo_t *cr, double width, double height, cairo_bool_t color) { cairo_pattern_t *pattern = cairo_pattern_reference(cairo_get_source (cr)); if (color) cairo_set_source_rgba (cr, 0, 1, 1, 0.5); cairo_rectangle (cr, 0, 0, width/2, height/2); cairo_fill (cr); /* Draw the middle rectangle using the foreground color */ if (color) cairo_set_source (cr, pattern); cairo_rectangle (cr, width/4, height/4, width/2, height/2); cairo_fill (cr); if (color) cairo_set_source_rgba (cr, 1, 1, 0, 0.5); cairo_rectangle (cr, width/2, height/2, width/2, height/2); cairo_fill (cr); cairo_pattern_destroy (pattern); } static void render_glyph_linear (cairo_t *cr, double width, double height, cairo_bool_t color) { cairo_pattern_t *pat; pat = cairo_pattern_create_linear (0.0, 0.0, width, height); cairo_pattern_add_color_stop_rgba (pat, 0, 1, 0, 0, 1); cairo_pattern_add_color_stop_rgba (pat, 0.5, 0, 1, 0, color ? 0.5 : 1); cairo_pattern_add_color_stop_rgba (pat, 1, 0, 0, 1, 1); cairo_set_source (cr, pat); cairo_rectangle (cr, 0, 0, width, height); cairo_fill (cr); } static void render_glyph_text (cairo_t *cr, double width, double height, cairo_bool_t color) { cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); cairo_set_font_size(cr, 0.5); if (color) cairo_set_source_rgb (cr, 0.5, 0.5, 0); cairo_move_to (cr, width*0.1, height/2); cairo_show_text (cr, "a"); if (color) cairo_set_source_rgb (cr, 0, 0.5, 0.5); cairo_move_to (cr, width*0.4, height*0.9); cairo_show_text (cr, "z"); } static cairo_status_t test_scaled_font_render_color_glyph (cairo_scaled_font_t *scaled_font, unsigned long glyph, cairo_t *cr, cairo_text_extents_t *metrics) { cairo_status_t status = CAIRO_STATUS_SUCCESS; double width = 0.5; double height = 0.8; metrics->x_advance = 0.75; cairo_translate (cr, 0.125, -0.6); switch (glyph) { case 'a': render_glyph_solid (cr, width, height, TRUE); break; case 'b': render_glyph_linear (cr, width, height, TRUE); break; case 'c': render_glyph_text (cr, width, height, TRUE); break; /* Ensure that the following glyphs are rendered with * test_scaled_font_render_glyph() even if we draw * something before returning. */ case 'd': render_glyph_solid (cr, width, height, TRUE); status = CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED; break; case 'e': render_glyph_linear (cr, width, height, TRUE); status = CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED; break; case 'f': render_glyph_solid (cr, width, height, TRUE); status = CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED; break; case 'g': cairo_push_group (cr); render_glyph_solid (cr, width, height, TRUE); cairo_pop_group_to_source (cr); cairo_paint (cr); break; case 'h': cairo_push_group (cr); render_glyph_linear (cr, width, height, TRUE); cairo_pop_group_to_source (cr); cairo_paint (cr); break; case 'i': cairo_push_group (cr); render_glyph_text (cr, width, height, TRUE); cairo_pop_group_to_source (cr); cairo_paint (cr); break; default: status = CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED; } return status; } 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) { double width = 0.5; double height = 0.8; metrics->x_advance = 0.75; cairo_translate (cr, 0.125, -0.6); switch (glyph) { case 'd': render_glyph_solid (cr, width, height, FALSE); break; case 'e': render_glyph_linear (cr, width, height, FALSE); break; case 'f': render_glyph_text (cr, width, height, FALSE); break; case 'j': cairo_push_group (cr); render_glyph_solid (cr, width, height, FALSE); cairo_pop_group_to_source (cr); cairo_paint (cr); break; case 'k': cairo_push_group (cr); render_glyph_linear (cr, width, height, FALSE); cairo_pop_group_to_source (cr); cairo_paint (cr); break; case 'l': cairo_push_group (cr); render_glyph_text (cr, width, height, FALSE); cairo_pop_group_to_source (cr); cairo_paint (cr); break; default: return CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED; } return CAIRO_STATUS_SUCCESS; } static cairo_status_t _user_font_face_create (cairo_font_face_t **out) { cairo_font_face_t *user_font_face; 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_color_glyph_func (user_font_face, test_scaled_font_render_color_glyph); cairo_user_font_face_set_render_glyph_func (user_font_face, test_scaled_font_render_glyph); *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); 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 color */ cairo_set_source_rgb (cr, 0, 0.3, 0); cairo_move_to (cr, BORDER, BORDER + font_extents.ascent); cairo_show_text (cr, text); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (user_font_color, "Tests user font color feature", "font, user-font", /* keywords */ "cairo >= 1.17.4", /* requirements */ WIDTH, HEIGHT, NULL, draw)