cairo/test/map-to-image.c

/*
 * Copyright © 2011 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Author: Chris Wilson <chris@chris-wilson.co.uk>
 */

#include "cairo-test.h"

#define WIDTH	3
#define HEIGHT	3

/* A single, black pixel */
static const uint32_t black_pixel = 0xff000000;

static cairo_test_status_t
all (cairo_t *cr, int width, int height)
{
    cairo_surface_t *surface;
    uint8_t *data;
    int stride;
    int i, j;

    /* Fill background white */
    cairo_set_source_rgb (cr, 1, 1, 1);
    cairo_paint (cr);

    surface = cairo_surface_map_to_image (cairo_get_target (cr), NULL);
    cairo_surface_flush (surface);
    stride = cairo_image_surface_get_stride (surface);
    data = cairo_image_surface_get_data (surface);
    if (data) {
	    for (j = 0; j < HEIGHT; j++)
		    for (i = 0; i < WIDTH; i++)
			    *(uint32_t *)(data + j * stride + 4*i) = black_pixel;
    }
    cairo_surface_mark_dirty (surface);
    cairo_surface_unmap_image (cairo_get_target (cr), surface);

    return CAIRO_TEST_SUCCESS;
}

static cairo_test_status_t
bit (cairo_t *cr, int width, int height)
{
    cairo_surface_t *surface;
    cairo_rectangle_t extents;
    uint8_t *data;

    extents.x = extents.y = extents.width = extents.height = 1;

    /* Fill background white */
    cairo_set_source_rgb (cr, 1, 1, 1);
    cairo_paint (cr);

    surface = cairo_surface_map_to_image (cairo_get_target (cr), &extents);
    cairo_surface_flush (surface);
    data = cairo_image_surface_get_data (surface);
    if (data)
	    *(uint32_t *)data = black_pixel;
    cairo_surface_mark_dirty (surface);
    cairo_surface_unmap_image (cairo_get_target (cr), surface);

    return CAIRO_TEST_SUCCESS;
}

static cairo_test_status_t
fill (cairo_t *cr, int width, int height)
{
    cairo_surface_t *surface;
    cairo_rectangle_t extents;
    cairo_t *cr2;

    extents.x = extents.y = extents.width = extents.height = 1;

    /* Fill background white */
    cairo_set_source_rgb (cr, 1, 1, 1);
    cairo_paint (cr);

    surface = cairo_surface_map_to_image (cairo_get_target (cr), &extents);
    cr2 = cairo_create (surface);
    cairo_set_source_rgb (cr2, 1, 0, 0);
    cairo_paint (cr2);
    cairo_destroy (cr2);
    cairo_surface_unmap_image (cairo_get_target (cr), surface);

    return CAIRO_TEST_SUCCESS;
}

CAIRO_TEST (map_all_to_image,
	    "Test maping a surface to an image and modifying it externally",
	    "image", /* keywords */
	    "target=raster", /* requirements */
	    WIDTH, HEIGHT,
	    NULL, all)
CAIRO_TEST (map_bit_to_image,
	    "Test maping a surface to an image and modifying it externally",
	    "image", /* keywords */
	    "target=raster", /* requirements */
	    WIDTH, HEIGHT,
	    NULL, bit)
CAIRO_TEST (map_to_image_fill,
	    "Test maping a surface to an image and modifying it externally",
	    "image", /* keywords */
	    "target=raster", /* requirements */
	    WIDTH, HEIGHT,
	    NULL, fill)