mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
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2fa709d6af
This should help with not requiring many backend-specific reference images, and some should be removed now.
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#define TEXT_SIZE 12
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#define PAD 4
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#define TEXT "text"
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static cairo_test_draw_function_t draw;
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cairo_test_t test = {
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"font-matrix-translation",
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"Test that translation in a font matrix can be used to offset a string",
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38, 34,
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draw
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};
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static void
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box_text (cairo_t *cr, const char *utf8, double x, double y)
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{
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double line_width;
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cairo_text_extents_t extents;
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cairo_save (cr);
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cairo_text_extents (cr, utf8, &extents);
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line_width = cairo_get_line_width (cr);
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cairo_rectangle (cr,
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x + extents.x_bearing - line_width / 2,
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y + extents.y_bearing - line_width / 2,
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extents.width + line_width,
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extents.height + line_width);
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cairo_stroke (cr);
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cairo_move_to (cr, x, y);
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cairo_show_text (cr, utf8);
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cairo_restore (cr);
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_text_extents_t extents;
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cairo_matrix_t matrix;
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cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
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cairo_paint (cr);
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cairo_select_font_face (cr, "Bitstream Vera Sans",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size (cr, TEXT_SIZE);
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cairo_translate (cr, PAD, PAD);
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cairo_set_line_width (cr, 1.0);
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cairo_text_extents (cr, TEXT, &extents);
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/* Draw text and bounding box */
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cairo_set_source_rgb (cr, 0, 0, 0); /* black */
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box_text (cr, TEXT, 0, - extents.y_bearing);
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/* Then draw again with the same coordinates, but with a font
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* matrix to position the text below and shifted a bit to the
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* right. */
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cairo_matrix_init_translate (&matrix, TEXT_SIZE / 2, TEXT_SIZE + PAD);
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cairo_matrix_scale (&matrix, TEXT_SIZE, TEXT_SIZE);
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cairo_set_font_matrix (cr, &matrix);
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cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
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box_text (cr, TEXT, 0, - extents.y_bearing);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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