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/*
* Copyright © 2006 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.
*
* Author: Carl D. Worth <cworth@cworth.org>
*/
#include "cairo-test.h"
#define TEXT_SIZE 12
#define PAD 4
#define TEXT "text"
static cairo_bool_t
text_extents_equal (const cairo_text_extents_t *A,
const cairo_text_extents_t *B)
{
return A->x_bearing == B->x_bearing &&
A->y_bearing == B->y_bearing &&
A->width == B->width &&
A->height == B->height &&
A->x_advance == B->x_advance &&
A->y_advance == B->y_advance;
}
static cairo_test_status_t
box_text (const cairo_test_context_t *ctx, cairo_t *cr,
const char *utf8,
double x, double y)
{
double line_width;
cairo_text_extents_t extents = {0}, scaled_extents = {0};
cairo_scaled_font_t *scaled_font;
cairo_status_t status;
cairo_save (cr);
cairo_text_extents (cr, utf8, &extents);
scaled_font = cairo_get_scaled_font (cr);
cairo_scaled_font_text_extents (scaled_font, TEXT, &scaled_extents);
status = cairo_scaled_font_status (scaled_font);
if (status)
return cairo_test_status_from_status (ctx, status);
if (! text_extents_equal (&extents, &scaled_extents)) {
cairo_test_log (ctx,
"Error: extents differ when they shouldn't:\n"
"cairo_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n"
"cairo_scaled_font_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance,
scaled_extents.x_bearing, scaled_extents.y_bearing,
scaled_extents.width, scaled_extents.height,
scaled_extents.x_advance, scaled_extents.y_advance);
return CAIRO_TEST_FAILURE;
}
line_width = cairo_get_line_width (cr);
cairo_rectangle (cr,
x + extents.x_bearing - line_width / 2,
y + extents.y_bearing - line_width / 2,
extents.width + line_width,
extents.height + line_width);
cairo_stroke (cr);
cairo_move_to (cr, x, y);
cairo_show_text (cr, utf8);
cairo_restore (cr);
return CAIRO_TEST_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);
cairo_test_status_t status;
cairo_text_extents_t extents;
cairo_matrix_t matrix;
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
cairo_paint (cr);
cairo_select_font_face (cr, "Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, TEXT_SIZE);
cairo_translate (cr, PAD, PAD);
cairo_set_line_width (cr, 1.0);
cairo_text_extents (cr, TEXT, &extents);
/* Draw text and bounding box */
cairo_set_source_rgb (cr, 0, 0, 0); /* black */
status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing);
if (status)
return status;
/* Then draw again with the same coordinates, but with a font
* matrix to position the text below and shifted a bit to the
* right. */
cairo_matrix_init_translate (&matrix, TEXT_SIZE / 2, TEXT_SIZE + PAD);
cairo_matrix_scale (&matrix, TEXT_SIZE, TEXT_SIZE);
cairo_set_font_matrix (cr, &matrix);
cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing);
if (status)
return status;
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (font_matrix_translation,
"Test that translation in a font matrix can be used to offset a string",
"font", /* keywords */
NULL, /* requirements */
38, 34,
NULL, draw)
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