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/*
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 * The MIT License (MIT)
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 *
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 * Copyright (c) 2014 Jan Solanti
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in all
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 * copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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 * SOFTWARE.
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 */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#pragma once
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#include <stdint.h>
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typedef struct {
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    int32_t width;
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    int32_t height;
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    uint8_t channels;
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    uint8_t depth; // must be 8 or 16
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    size_t dataSize;
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    uint8_t *data;
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} LuImage;
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typedef size_t (*PngReadProc)(void *outPtr, size_t size, size_t count, void *userPtr);
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typedef size_t (*PngWriteProc)(const void *inPtr, size_t size, size_t count, void *userPtr);
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/**
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 * Creates a new Image object with the specified attributes.
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 * The data store of the Image is allocated but its contents are undefined.
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 * Only 8 and 16 bits deep images with 1-4 channels are supported.
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 */
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LuImage *luImageCreate(size_t width, size_t height, uint8_t channels, uint8_t depth);
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/**
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 * Releases the memory associated with the given Image object.
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 */
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void luImageRelease(LuImage *img);
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/**
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 * Decodes a PNG image with the provided read function into a LuImage struct
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 *
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 * @param readProc a function pointer to a user-defined function to use for
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 * reading the PNG data.
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 * @param userPtr an opaque pointer provided as an argument to readProc
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 */
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LuImage *luPngRead(PngReadProc readProc, void *userPtr);
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/**
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 * Encodes a LuImage struct to PNG and writes it out using a user-defined write
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 * function.
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 *
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 * @param writeProc a function pointer to a user-defined function that will be
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 * used for writing the final PNG data.
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 * @param userPtr an opaque pointer provided as an argument to writeProc
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 * @param img the LuImage to encode
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 */
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int luPngWrite(PngWriteProc writeProc, void *userPtr, LuImage *img);
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#ifdef __cplusplus
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}
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#endif
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