Grcov report - create-from-png-stream.c

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/*

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 * Copyright © 2005 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 Worth <cworth@cworth.org>

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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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#include <errno.h>

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#define WIDTH 2

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#define HEIGHT 2

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static cairo_status_t

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read_png_from_file (void *closure, unsigned char *data, unsigned int length)

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    FILE *file = closure;

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    size_t bytes_read;

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    bytes_read = fread (data, 1, length, file);

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    if (bytes_read != length)

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	return CAIRO_STATUS_READ_ERROR;

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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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3

    const cairo_test_context_t *ctx = cairo_test_get_context (cr);

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    char *filename;

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    FILE *file;

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    cairo_surface_t *surface;

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    cairo_status_t status;

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3

    xasprintf (&filename, "%s/reference/%s", ctx->srcdir,

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	       "create-from-png-stream.ref.png");

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3

    file = fopen (filename, "rb");

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3

    if (file == NULL) {

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	cairo_test_status_t ret;

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	ret = CAIRO_TEST_FAILURE;

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	if (errno == ENOMEM)

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	    ret = cairo_test_status_from_status (ctx, CAIRO_STATUS_NO_MEMORY);

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	if (ret != CAIRO_TEST_NO_MEMORY)

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	    cairo_test_log (ctx, "Error: failed to open file: %s\n", filename);

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	free (filename);

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	return ret;

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3

    surface = cairo_image_surface_create_from_png_stream (read_png_from_file,

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							  file);

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    fclose (file);

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    status = cairo_surface_status (surface);

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    if (status) {

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	cairo_test_status_t ret;

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	cairo_surface_destroy (surface);

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	ret = cairo_test_status_from_status (ctx, status);

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	if (ret != CAIRO_TEST_NO_MEMORY) {

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	    cairo_test_log (ctx,

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			    "Error: failed to create surface from PNG: %s - %s\n",

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			    filename,

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			    cairo_status_to_string (status));

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	free (filename);

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	return ret;

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3

    free (filename);

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    /* Pretend we modify the surface data (which detaches the PNG mime data) */

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3

    cairo_surface_flush (surface);

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    cairo_surface_mark_dirty (surface);

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    cairo_set_source_surface (cr, surface, 0, 0);

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3

    cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);

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3

    cairo_paint (cr);

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    cairo_surface_destroy (surface);

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3

    return CAIRO_TEST_SUCCESS;

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CAIRO_TEST (create_from_png_stream,

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	    "Tests the creation of an image surface from a PNG using a FILE *",

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	    "png", /* keywords */

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	    NULL, /* requirements */

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	    WIDTH, HEIGHT,

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	    NULL, draw)