nvdialog_image.h

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/*
 *  The MIT License (MIT)
 *
 *  Copyright (c) 2025 Aggelos Tselios
 *
 *  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
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 */
 
#pragma once
 
 
#ifndef __nvdialog_image_h__
#define __nvdialog_image_h__ 1
 
#include <stddef.h>
#include <stdint.h>
#include "nvdialog_platform.h"
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
/**
 * @brief Data that can be interpeted as an image.
 *
 * The data format is RGBA for library-wide compatibility
 * across various operating systems. Other formats are supported
 * and automatically converted.
 *
 * @note Using image functionality does not require @ref nvd_init, although
 * doing anything useful with the image probably does. This may come in handy if
 * you wish to load images early on and use them later, possibly caching them in
 * memory.
 *
 * @ingroup Image
 * @since v0.9.0
 */
typedef struct _NvdImage NvdImage;
 
/**
 * @brief
 *
 * @param filename The path to the file to be loaded. For best compatibility,
 * provide a full path or use @ref NvdFileDialog
 * @param width A pointer to a variable to hold the width of the image
 * @param height A pointer to a variable to hold the height of the image
 * @ingroup Image
 * @since v0.9.0
 * @return A pointer to dynamically allocated image data. The returned pointer
 * must not be freed manually; Instead use @ref nvd_destroy_image.
 */
NVD_API const uint8_t *nvd_image_from_filename(const char *filename, int *width,
                                               int *height);
 
/**
 * @brief Creates an `NvdImage` from the given buffer (data).
 * Although recommended, it is not necessary to use @ref nvd_image_from_filename
 * since other libraries can also provide RGBA data.
 * @warning As described in the @ref NvdImage documentation, the pointer provided in @ref data MUST be in RGBA format. Not using @ref nvd_image_from_filename carries the additional burden of ensuring this manually.
 * @param data The data to use as the image
 * @param width The width of the image
 * @param height The height of the image
 * @ingroup Image
 * @return NvdImage* A pointer to an `NvdImage` object.
 */
NVD_API NvdImage *nvd_create_image(const uint8_t *data, int width, int height);
 
/**
 * @brief Destroys an @ref NvdImage.
 * @param image The image to destroy
 * @ingroup Image
 * @since v0.9.0
 */
NVD_API void nvd_destroy_image(NvdImage *image);
 
/**
 * @brief Returns the raw image bytes that the given image contains
 * @note Format, as with every @ref NvdImage, is always RGBA.
 * @param image The image to get the bytes from
 * @ingroup Image
 * @since v0.10.1
 */
NVD_API uint8_t *nvd_image_to_bytes(NvdImage *image);
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* __nvdialog_image_h__ */