/* * 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 * Behdad Esfahbod */ #include #include #include "cairo-test.h" /*#define ROTATED 1*/ #define BORDER 10 #define TEXT_SIZE 64 #define WIDTH (TEXT_SIZE * 12 + 2*BORDER) #define HEIGHT ((TEXT_SIZE + 2*BORDER)*2) #define TEXT "geez... cairo user-font" static cairo_test_draw_function_t draw; static const cairo_test_t test = { "user-font-proxy", "Tests a user-font using a native font in its render_glyph", #ifndef ROTATED WIDTH, HEIGHT, #else WIDTH, WIDTH, #endif draw }; static cairo_user_data_key_t fallback_font_key; static cairo_status_t test_scaled_font_init (cairo_scaled_font_t *scaled_font, cairo_t *cr, cairo_font_extents_t *extents) { cairo_set_font_face (cr, cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font), &fallback_font_key)); cairo_scaled_font_set_user_data (scaled_font, &fallback_font_key, cairo_scaled_font_reference (cairo_get_scaled_font (cr)), (cairo_destroy_func_t) cairo_scaled_font_destroy); cairo_font_extents (cr, extents); 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 *extents) { cairo_glyph_t cairo_glyph; cairo_glyph.index = glyph; cairo_glyph.x = 0; cairo_glyph.y = 0; cairo_set_font_face (cr, cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font), &fallback_font_key)); cairo_show_glyphs (cr, &cairo_glyph, 1); cairo_glyph_extents (cr, &cairo_glyph, 1, extents); return CAIRO_STATUS_SUCCESS; } static cairo_status_t test_scaled_font_text_to_glyphs (cairo_scaled_font_t *scaled_font, const char *utf8, int utf8_len, cairo_glyph_t **glyphs, int *num_glyphs, cairo_text_cluster_t **clusters, int *num_clusters, cairo_text_cluster_flags_t *cluster_flags) { cairo_scaled_font_t *fallback_scaled_font; fallback_scaled_font = cairo_scaled_font_get_user_data (scaled_font, &fallback_font_key); return cairo_scaled_font_text_to_glyphs (fallback_scaled_font, 0, 0, utf8, utf8_len, glyphs, num_glyphs, clusters, num_clusters, cluster_flags); } static cairo_font_face_t *user_font_face = NULL; static cairo_font_face_t * get_user_font_face (void) { if (!user_font_face) { cairo_font_face_t *fallback_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_glyph_func (user_font_face, test_scaled_font_render_glyph); cairo_user_font_face_set_text_to_glyphs_func (user_font_face, test_scaled_font_text_to_glyphs); /* This also happens to be default font face on cairo_t, so does * not make much sense here. For demonstration only. */ fallback_font_face = cairo_toy_font_face_create ("", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); cairo_font_face_set_user_data (user_font_face, &fallback_font_key, fallback_font_face, (cairo_destroy_func_t) cairo_font_face_destroy); } return user_font_face; } static cairo_test_status_t draw (cairo_t *cr, int width, int height) { const char text[] = TEXT; cairo_font_extents_t font_extents; cairo_text_extents_t extents; cairo_set_source_rgb (cr, 1, 1, 1); cairo_paint (cr); #ifdef ROTATED cairo_translate (cr, TEXT_SIZE, 0); cairo_rotate (cr, .6); #endif cairo_set_font_face (cr, get_user_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 gray */ 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 light blue */ cairo_set_source_rgb (cr, 0, 0, 1); cairo_move_to (cr, BORDER, BORDER + font_extents.height + BORDER + font_extents.ascent); cairo_text_path (cr, text); cairo_fill (cr); if (user_font_face) { cairo_font_face_destroy (user_font_face); user_font_face = NULL; } return CAIRO_TEST_SUCCESS; } int main (void) { return cairo_test (&test); }