Grcov report - font-matrix-translation.c

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/*

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 * Copyright © 2006 Red Hat, Inc.

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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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 * 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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 * 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_bool_t

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text_extents_equal (const cairo_text_extents_t *A,

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	            const cairo_text_extents_t *B)

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    return A->x_bearing == B->x_bearing &&

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	   A->y_bearing == B->y_bearing &&

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	   A->width     == B->width     &&

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	   A->height    == B->height    &&

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	   A->x_advance == B->x_advance &&

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	   A->y_advance == B->y_advance;

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static cairo_test_status_t

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box_text (const cairo_test_context_t *ctx, cairo_t *cr,

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	  const char *utf8,

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	  double x, double y)

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    double line_width;

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    cairo_text_extents_t extents = {0}, scaled_extents = {0};

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    cairo_scaled_font_t *scaled_font;

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    cairo_status_t status;

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    cairo_save (cr);

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    cairo_text_extents (cr, utf8, &extents);

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    scaled_font = cairo_get_scaled_font (cr);

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    cairo_scaled_font_text_extents (scaled_font, TEXT, &scaled_extents);

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    status = cairo_scaled_font_status (scaled_font);

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    if (status)

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	return cairo_test_status_from_status (ctx, status);

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    if (! text_extents_equal (&extents, &scaled_extents)) {

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        cairo_test_log (ctx,

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			"Error: extents differ when they shouldn't:\n"

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			"cairo_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n"

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			"cairo_scaled_font_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n",

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		        extents.x_bearing, extents.y_bearing,

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			extents.width, extents.height,

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			extents.x_advance, extents.y_advance,

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		        scaled_extents.x_bearing, scaled_extents.y_bearing,

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			scaled_extents.width, scaled_extents.height,

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			scaled_extents.x_advance, scaled_extents.y_advance);

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        return CAIRO_TEST_FAILURE;

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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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    return CAIRO_TEST_SUCCESS;

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static cairo_test_status_t

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3

draw (cairo_t *cr, int width, int height)

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    const cairo_test_context_t *ctx = cairo_test_get_context (cr);

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    cairo_test_status_t status;

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    cairo_text_extents_t extents;

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    cairo_matrix_t matrix;

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3

    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */

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3

    cairo_paint (cr);

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3

    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",

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			    CAIRO_FONT_SLANT_NORMAL,

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			    CAIRO_FONT_WEIGHT_NORMAL);

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3

    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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    status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing);

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    if (status)

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	return status;

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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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    status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing);

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    if (status)

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	return status;

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    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (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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	    "font", /* keywords */

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	    NULL, /* requirements */

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	    38, 34,

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	    NULL, draw)