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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* This isn't a "real" surface, but just something to be used by the
* test suite to test a mythical backend that uses nothing but
* fallbacks.
*
* The defining feature of this backend is that it has as many %NULL
* backend function entries as possible. The ones that aren't %NULL are
* simply those that must be implemented to have working fallbacks.
* (Except for create_similar---fallbacks would work fine without
* that---I implemented it here in order to create as many surfaces as
* possible of type test_fallback_surface_t during the test suite
* run).
*
* It's possible that this code might serve as a good starting point
* for someone working on bringing up a new backend, starting with the
* minimal all-fallbacks approach and working up gradually from
* there.
*/
#include "cairoint.h"
#include "test-fallback-surface.h"
#include "cairo-error-private.h"
typedef struct _test_fallback_surface {
cairo_surface_t base;
/* This is a cairo_image_surface to hold the actual contents. */
cairo_surface_t *backing;
} test_fallback_surface_t;
static const cairo_surface_backend_t test_fallback_surface_backend;
slim_hidden_proto (_cairo_test_fallback_surface_create);
cairo_surface_t *
_cairo_test_fallback_surface_create (cairo_content_t content,
int width,
int height)
{
test_fallback_surface_t *surface;
cairo_surface_t *backing;
backing = _cairo_image_surface_create_with_content (content, width, height);
if (cairo_surface_status (backing))
return backing;
surface = malloc (sizeof (test_fallback_surface_t));
if (unlikely (surface == NULL)) {
cairo_surface_destroy (backing);
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
}
_cairo_surface_init (&surface->base,
&test_fallback_surface_backend,
NULL, /* device */
content);
surface->backing = backing;
return &surface->base;
}
slim_hidden_def (_cairo_test_fallback_surface_create);
static cairo_surface_t *
_test_fallback_surface_create_similar (void *abstract_surface,
cairo_content_t content,
int width,
int height)
{
assert (CAIRO_CONTENT_VALID (content));
return _cairo_test_fallback_surface_create (content,
width, height);
}
static cairo_status_t
_test_fallback_surface_finish (void *abstract_surface)
{
test_fallback_surface_t *surface = abstract_surface;
cairo_surface_destroy (surface->backing);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_test_fallback_surface_acquire_source_image (void *abstract_surface,
cairo_image_surface_t **image_out,
void **image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
return _cairo_surface_acquire_source_image (surface->backing,
image_out, image_extra);
}
static void
_test_fallback_surface_release_source_image (void *abstract_surface,
cairo_image_surface_t *image,
void *image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
_cairo_surface_release_source_image (surface->backing,
image, image_extra);
}
static cairo_status_t
_test_fallback_surface_acquire_dest_image (void *abstract_surface,
cairo_rectangle_int_t *interest_rect,
cairo_image_surface_t **image_out,
cairo_rectangle_int_t *image_rect_out,
void **image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
return _cairo_surface_acquire_dest_image (surface->backing,
interest_rect,
image_out,
image_rect_out,
image_extra);
}
static void
_test_fallback_surface_release_dest_image (void *abstract_surface,
cairo_rectangle_int_t *interest_rect,
cairo_image_surface_t *image,
cairo_rectangle_int_t *image_rect,
void *image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
_cairo_surface_release_dest_image (surface->backing,
interest_rect,
image,
image_rect,
image_extra);
}
static cairo_status_t
_test_fallback_surface_clone_similar (void *abstract_surface,
cairo_surface_t *src,
int src_x,
int src_y,
int width,
int height,
int *clone_offset_x,
int *clone_offset_y,
cairo_surface_t **clone_out)
{
test_fallback_surface_t *surface = abstract_surface;
if (src->backend == surface->base.backend) {
*clone_offset_x = 0;
*clone_offset_y = 0;
*clone_out = cairo_surface_reference (src);
return CAIRO_STATUS_SUCCESS;
}
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_bool_t
_test_fallback_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *rectangle)
{
test_fallback_surface_t *surface = abstract_surface;
return _cairo_surface_get_extents (surface->backing, rectangle);
}
static const cairo_surface_backend_t test_fallback_surface_backend = {
CAIRO_INTERNAL_SURFACE_TYPE_TEST_FALLBACK,
_test_fallback_surface_create_similar,
_test_fallback_surface_finish,
_test_fallback_surface_acquire_source_image,
_test_fallback_surface_release_source_image,
_test_fallback_surface_acquire_dest_image,
_test_fallback_surface_release_dest_image,
_test_fallback_surface_clone_similar,
NULL, /* composite */
NULL, /* fill_rectangles */
NULL, /* composite_trapezoids */
NULL, /* create_span_renderer */
NULL, /* check_span_renderer */
NULL, /* copy_page */
NULL, /* show_page */
_test_fallback_surface_get_extents,
NULL, /* old_show_glyphs */
NULL, /* get_font_options */
NULL, /* flush */
NULL, /* mark_dirty_rectangle */
NULL, /* scaled_font_fini */
NULL, /* scaled_glyph_fini */
NULL, /* paint */
NULL, /* mask */
NULL, /* stroke */
NULL, /* fill */
NULL, /* show_glyphs */
NULL /* snapshot */
};
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