Grcov report - user-font-mask.c

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/*

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 * Copyright © 2006, 2008 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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 * Contributor(s):

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 *	Kristian Høgsberg <krh@redhat.com>

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 *	Behdad Esfahbod <behdad@behdad.org>

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 *	Adrian Johnson <ajohnson@redneon.com>

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*/

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#include "cairo-test.h"

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#include <stdlib.h>

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#include <stdio.h>

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/*#define ROTATED 1*/

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#define BORDER 10

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#define TEXT_SIZE 64

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#define WIDTH  (TEXT_SIZE * 15 + 2*BORDER)

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#ifndef ROTATED

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 #define HEIGHT ((TEXT_SIZE + 2*BORDER)*2)

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#else

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 #define HEIGHT WIDTH

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#endif

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#define END_GLYPH 0

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#define TEXT   "cairo"

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/* Reverse the bits in a byte with 7 operations (no 64-bit):

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 * Devised by Sean Anderson, July 13, 2001.

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 * Source: http://graphics.stanford.edu/~seander/bithacks.html#ReverseByteWith32Bits

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*/

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#define CAIRO_BITSWAP8(c) ((((c) * 0x0802LU & 0x22110LU) | ((c) * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16)

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#ifdef WORDS_BIGENDIAN

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#define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) (c)

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#else

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#define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) CAIRO_BITSWAP8(c)

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#endif

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/* Simple glyph definition. data is an 8x8 bitmap.

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*/

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typedef struct {

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    unsigned long ucs4;

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    int width;

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    char data[8];

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} test_scaled_font_glyph_t;

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static cairo_user_data_key_t test_font_face_glyphs_key;

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static cairo_status_t

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3

test_scaled_font_init (cairo_scaled_font_t  *scaled_font,

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		       cairo_t              *cr,

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		       cairo_font_extents_t *metrics)

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3

  metrics->ascent  = 1;

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  metrics->descent = 0;

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3

  return CAIRO_STATUS_SUCCESS;

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static cairo_status_t

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test_scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font,

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				   unsigned long        unicode,

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				   unsigned long       *glyph)

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    test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),

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								      &test_font_face_glyphs_key);

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    int i;

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    for (i = 0; glyphs[i].ucs4 != (unsigned long) -1; i++)

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	if (glyphs[i].ucs4 == unicode) {

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	    *glyph = i;

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	    return CAIRO_STATUS_SUCCESS;

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    /* Not found.  Default to glyph 0 */

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    return CAIRO_STATUS_SUCCESS;

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static cairo_status_t

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15

test_scaled_font_render_glyph (cairo_scaled_font_t  *scaled_font,

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			       unsigned long         glyph,

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			       cairo_t              *cr,

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			       cairo_text_extents_t *metrics)

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    test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),

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								      &test_font_face_glyphs_key);

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    int i;

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    unsigned char *data;

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    cairo_surface_t *image;

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    cairo_pattern_t *pattern;

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    cairo_matrix_t matrix;

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    uint8_t byte;

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    /* FIXME: We simply crash on out-of-bound glyph indices */

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    metrics->x_advance = (glyphs[glyph].width + 1) / 8.0;

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    image = cairo_image_surface_create (CAIRO_FORMAT_A1, glyphs[glyph].width, 8);

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    if (cairo_surface_status (image))

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	return cairo_surface_status (image);

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    data = cairo_image_surface_get_data (image);

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    for (i = 0; i < 8; i++) {

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	byte = glyphs[glyph].data[i];

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	*data = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (byte);

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	data += cairo_image_surface_get_stride (image);

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    cairo_surface_mark_dirty (image);

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    pattern = cairo_pattern_create_for_surface (image);

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    cairo_surface_destroy (image);

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    cairo_matrix_init_identity (&matrix);

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    cairo_matrix_scale (&matrix, 1.0/8.0, 1.0/8.0);

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    cairo_matrix_translate (&matrix, 0, -8);

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    cairo_matrix_invert (&matrix);

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    cairo_pattern_set_matrix (pattern, &matrix);

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    cairo_set_source (cr, pattern);

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    cairo_mask (cr, pattern);

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    cairo_pattern_destroy (pattern);

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    return CAIRO_STATUS_SUCCESS;

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static cairo_status_t

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3

_user_font_face_create (cairo_font_face_t **out)

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    static const test_scaled_font_glyph_t glyphs [] = {

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	{ 'c',  6, { 0x00, 0x38, 0x44, 0x80, 0x80, 0x80, 0x44, 0x38 } },

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	{ 'a',  6, { 0x00, 0x70, 0x88, 0x3c, 0x44, 0x84, 0x8c, 0x74 } },

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	{ 'i',  1, { 0x80, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 } },

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	{ 'r',  6, { 0x00, 0xb8, 0xc4, 0x80, 0x80, 0x80, 0x80, 0x80 } },

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	{ 'o',  7, { 0x00, 0x38, 0x44, 0x82, 0x82, 0x82, 0x44, 0x38 } },

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	{  -1,  8, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },

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};

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    cairo_font_face_t *user_font_face;

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    cairo_status_t status;

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    user_font_face = cairo_user_font_face_create ();

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    cairo_user_font_face_set_init_func             (user_font_face, test_scaled_font_init);

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    cairo_user_font_face_set_render_glyph_func     (user_font_face, test_scaled_font_render_glyph);

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    cairo_user_font_face_set_unicode_to_glyph_func (user_font_face, test_scaled_font_unicode_to_glyph);

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    status = cairo_font_face_set_user_data (user_font_face,

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					    &test_font_face_glyphs_key,

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					    (void*) glyphs, NULL);

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    if (status) {

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	cairo_font_face_destroy (user_font_face);

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	return status;

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3

    *out = user_font_face;

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    return CAIRO_STATUS_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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    cairo_font_face_t *font_face;

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    const char text[] = TEXT;

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    cairo_font_extents_t font_extents;

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    cairo_text_extents_t extents;

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    cairo_status_t status;

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    cairo_set_source_rgb (cr, 1, 1, 1);

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    cairo_paint (cr);

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#ifdef ROTATED

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    cairo_translate (cr, TEXT_SIZE, 0);

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    cairo_rotate (cr, .6);

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#endif

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    status = _user_font_face_create (&font_face);

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    if (status) {

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	return cairo_test_status_from_status (cairo_test_get_context (cr),

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					      status);

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    cairo_set_font_face (cr, font_face);

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    cairo_font_face_destroy (font_face);

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    cairo_set_font_size (cr, TEXT_SIZE);

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    cairo_font_extents (cr, &font_extents);

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    cairo_text_extents (cr, text, &extents);

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    /* logical boundaries in red */

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    cairo_move_to (cr, 0, BORDER);

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    cairo_rel_line_to (cr, WIDTH, 0);

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    cairo_move_to (cr, 0, BORDER + font_extents.ascent);

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    cairo_rel_line_to (cr, WIDTH, 0);

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    cairo_move_to (cr, 0, BORDER + font_extents.ascent + font_extents.descent);

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    cairo_rel_line_to (cr, WIDTH, 0);

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    cairo_move_to (cr, BORDER, 0);

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    cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE);

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    cairo_move_to (cr, BORDER + extents.x_advance, 0);

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    cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE);

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    cairo_set_source_rgb (cr, 1, 0, 0);

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    cairo_set_line_width (cr, 2);

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    cairo_stroke (cr);

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    /* ink boundaries in green */

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    cairo_rectangle (cr,

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		     BORDER + extents.x_bearing, BORDER + font_extents.ascent + extents.y_bearing,

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		     extents.width, extents.height);

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    cairo_set_source_rgb (cr, 0, 1, 0);

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    cairo_set_line_width (cr, 2);

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    cairo_stroke (cr);

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    /* text in black */

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    cairo_set_source_rgb (cr, 0, 0, 0);

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    cairo_move_to (cr, BORDER, BORDER + font_extents.ascent);

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    cairo_show_text (cr, text);

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    /* filled version of text in blue */

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    cairo_set_source_rgb (cr, 0, 0, 1);

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    cairo_move_to (cr, BORDER, BORDER + font_extents.height + 2*BORDER + font_extents.ascent);

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    cairo_text_path (cr, text);

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    cairo_fill (cr);

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    return CAIRO_TEST_SUCCESS;

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1

CAIRO_TEST (user_font_mask,

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	    "Tests a user-font using cairo_mask with bitmap images",

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	    "user-font, mask", /* keywords */

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	    NULL, /* requirements */

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	    WIDTH, HEIGHT,

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	    NULL, draw)