include/c/sk_image.h

/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

// EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL
// DO NOT USE -- FOR INTERNAL TESTING ONLY

#ifndef sk_image_DEFINED
#define sk_image_DEFINED

#include "sk_types.h"

SK_C_PLUS_PLUS_BEGIN_GUARD

/**
 *  Return a new image that has made a copy of the provided pixels, or NULL on failure.
 *  Balance with a call to sk_image_unref().
 */
SK_API sk_image_t* sk_image_new_raster_copy(const sk_imageinfo_t*, const void* pixels, size_t rowBytes);

/**
 *  If the specified data can be interpreted as a compressed image (e.g. PNG or JPEG) then this
 *  returns an image. If the encoded data is not supported, returns NULL.
 *
 *  On success, the encoded data may be processed immediately, or it may be ref()'d for later
 *  use.
 */
SK_API sk_image_t* sk_image_new_from_encoded(const sk_data_t* encoded, const sk_irect_t* subset);

/**
 *  Encode the image's pixels and return the result as a new PNG in a
 *  sk_data_t, which the caller must manage: call sk_data_unref() when
 *  they are done.
 *
 *  If the image type cannot be encoded, this will return NULL.
 */
SK_API sk_data_t* sk_image_encode(const sk_image_t*);

/**
 *  Increment the reference count on the given sk_image_t. Must be
 *  balanced by a call to sk_image_unref().
*/
SK_API void sk_image_ref(const sk_image_t*);
/**
 *  Decrement the reference count. If the reference count is 1 before
 *  the decrement, then release both the memory holding the sk_image_t
 *  and the memory it is managing.  New sk_image_t are created with a
    reference count of 1.
*/
SK_API void sk_image_unref(const sk_image_t*);

/**
 *  Return the width of the sk_image_t/
 */
SK_API int sk_image_get_width(const sk_image_t*);
/**
 *  Return the height of the sk_image_t/
 */
SK_API int sk_image_get_height(const sk_image_t*);

/**
 *  Returns a non-zero value unique among all images.
 */
SK_API uint32_t sk_image_get_unique_id(const sk_image_t*);

SK_C_PLUS_PLUS_END_GUARD

#endif