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winix/winixd/core/image.h

215 lines
5.4 KiB

/*
* This file is a part of Winix
* and is distributed under the 2-Clause BSD licence.
* Author: Tomasz Sowa <t.sowa@ttmath.org>
*/
/*
* Copyright (c) 2010-2021, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef headerfile_winix_core_image
#define headerfile_winix_core_image
#include <string>
#include <list>
#include "basethread.h"
#include "textstream.h"
#include "db/db.h"
#include "core/config.h"
#include "models/item.h"
namespace Winix
{
class System;
// aspect modes:
// Width given, height automagically selected to preserve aspect ratio.
#define WINIX_IMAGE_MODE_1 1
// Height given, width automagically selected to preserve aspect ratio.
#define WINIX_IMAGE_MODE_2 2
// Maximum values of height and width given, aspect ratio preserved.
#define WINIX_IMAGE_MODE_3 3
// Minimum values of width and height given, aspect ratio preserved.
#define WINIX_IMAGE_MODE_4 4
// Width and height emphatically given, original aspect ratio ignored.
#define WINIX_IMAGE_MODE_5 5
// Change as per widthxheight but only if an image dimension exceeds a specified dimension.
#define WINIX_IMAGE_MODE_6 6
// Change dimensions only if both image dimensions are less than specified dimensions.
#define WINIX_IMAGE_MODE_7 7
// resizing
#define WINIX_IMAGE_TYPE_RESIZE 1
// generating a thumbnail
#define WINIX_IMAGE_TYPE_CREATE_THUMB 2
// cropping an image
#define WINIX_IMAGE_TYPE_CROP 3
// cropping an thumbnail
#define WINIX_IMAGE_TYPE_CROP_THUMB 4
// creating by cropping a new thumbnail (from an original image)
#define WINIX_IMAGE_TYPE_CREATE_CROP_NEW_THUMB 5
/*
*/
class Image : public BaseThread
{
public:
struct Scale
{
size_t cx;
size_t cy;
int aspect_mode;
int quality;
Scale()
{
cx = cy = 1;
aspect_mode = 2;
quality = 100;
};
};
void SetDb(Db * pdb);
void SetConfig(Config * pconfig);
void SetSystem(System * psystem);
// returning scale info for a directory
Scale GetImageScale(long dir_id);
// returning scale info (for thumbnails) for a directory
Scale GetThumbScale(long dir_id);
void Resize(long file_id, size_t cx, size_t cy, int aspect_mode, int quality);
// creating a new thumbnail from an original image
void CreateThumb(long file_id, size_t thumb_cx, size_t thumb_cy, int aspect_mode, int quality);
// cropping an image (the thumbnail is not changed)
void Crop(long file_id, size_t xoffset, size_t yoffset, size_t cx, size_t cy, int quality);
// cropping an existing thumbnail
void CropThumb(long file_id, size_t xoffset, size_t yoffset, size_t cx, size_t cy, int quality);
// creating and cropping a new thumbnail (from an original image)
void CropNewThumb(long file_id, size_t xoffset, size_t yoffset, size_t cx, size_t cy,
size_t thumb_cx, size_t thumb_cy, int aspect_mode, int quality);
private:
Db * db;
Config * config;
System * system;
struct ImageItem
{
int type; // WINIX_IMAGE_TYPE_*
long file_id;
size_t cx;
size_t cy;
size_t xoffset; // xoffset and yoffset are used when cropping
size_t yoffset;
size_t thumb_cx;
size_t thumb_cy;
int aspect_mode;
int quality;
};
template<typename int_type>
void SetMinMax(int_type & var, int var_min, int var_max)
{
if( static_cast<int>(var) < var_min )
var = var_min;
if( static_cast<int>(var) > var_max )
var = var_max;
}
// queue of thumbnails to create
typedef std::list<ImageItem> ImageTab;
ImageTab image_tab;
ImageItem item_temp;
// only for second thread
ImageItem item_work;
std::wstring src_path, dst_path;
TextStream<std::string> command;
TextStream<std::wstring> stream_tmp_path;
std::string add_tempa;
std::string input_file_name;
std::string tmp_file_name;
Item file_work;
virtual bool SignalReceived();
virtual void Do();
bool CreateCommand();
bool CreateInputFileName();
void CreateTmpFileName();
void SaveImage();
void CreateImage();
void SelectAspect(size_t cx, size_t cy);
void EscapePath(const std::string & path, TextStream<std::string> & out, bool clear_stream = true);
void CheckParam(ImageItem & item);
void Add(const std::wstring & in, TextStream<std::string> & out);
void ImageSavedCorrectly();
};
} // namespace Winix
#endif