// Copyright 2020 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <cairo.h>

#include <cairo-pdf.h>

#include "fuzzer_temp_file.h"

static cairo_surface_t *

acquire (cairo_pattern_t *pattern, void *closure,

       cairo_surface_t *target,

       const cairo_rectangle_int_t *extents)

{

    return cairo_image_surface_create_from_png(closure);

}

static void

release (cairo_pattern_t *pattern, void *closure, cairo_surface_t *surface)

{

    cairo_surface_destroy(surface);

}

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

    cairo_t *cr;

    cairo_surface_t *surface;

    cairo_pattern_t *pattern;

    cairo_content_t content;

    cairo_status_t status;

    int w, h;

    char *tmpfile = fuzzer_get_tmpfile(data, size);

    surface = cairo_image_surface_create_from_png(tmpfile);

    status = cairo_surface_status (surface);

    if (status != CAIRO_STATUS_SUCCESS) {

        fuzzer_release_tmpfile(tmpfile);

        return 0;

    }

    cr = cairo_create(surface);

    content = cairo_surface_get_content(surface);

    w = cairo_image_surface_get_width(surface);

    h = cairo_image_surface_get_height(surface);

    char *buf = (char *) calloc(size + 1, sizeof(char));

    memcpy(buf, data, size);

    buf[size] = '\0';

    pattern = cairo_pattern_create_raster_source(buf, content, w, h);

    cairo_raster_source_pattern_set_acquire (pattern, acquire, release);

    cairo_set_source(cr, pattern);

    cairo_pdf_surface_set_page_label(surface, buf);

    cairo_pdf_surface_set_metadata(surface, CAIRO_PDF_METADATA_KEYWORDS, buf);

    cairo_paint(cr);

    cairo_destroy(cr);

    cairo_pattern_destroy(pattern);

    cairo_surface_destroy(surface);

    free(buf);

    fuzzer_release_tmpfile(tmpfile);

    return 0;

}