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/*
* Copyright (C) 2017 Stéphane Fillion
* Authors: Stéphane Fillion <stphanef3724@gmail.com>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
namespace WebP
{
// Returns the size of the compressed data (pointed to by *output), or 0 if
// an error occurred. The compressed data must be released by the caller
// using the call 'free(*output)'.
// These functions compress using the lossy format, and the quality_factor
// can go from 0 (smaller output, lower quality) to 100 (best quality,
// larger output).
[CCode (cheader_filename = "webp/encode.h", cname = "WebPEncodeRGB")]
private size_t _encode_rgb ([CCode (array_length = false)] uint8[] rgb,
int width,
int height,
int stride,
float quality_factor,
[CCode (array_length = false)] out uint8[] output);
[CCode (cname = "vala_encode_rgb")]
public uint8[] encode_rgb (uint8[] rgb, int width, int height, int stride, float quality_factor)
{
uint8[] output;
size_t length;
length = _encode_rgb (rgb, width, height, stride, quality_factor, out output);
output.length = (int) length;
return output;
}
// These functions are the equivalent of the above, but compressing in a
// lossless manner. Files are usually larger than lossy format, but will
// not suffer any compression loss.
[CCode (cheader_filename = "webp/encode.h", cname = "WebPEncodeLosslessRGB")]
private size_t _encode_lossless_rgb ([CCode (array_length = false)] uint8[] rgb,
int width,
int height,
int stride,
[CCode (array_length = false)] out uint8[] output);
[CCode (cname = "vala_encode_lossless_rgb")]
public uint8[] encode_lossless_rgb (uint8[] rgb, int width, int height, int stride)
{
uint8[] output;
size_t length;
length = _encode_lossless_rgb (rgb, width, height, stride, out output);
output.length = (int) length;
return output;
}
}
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