mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-09-23 00:11:49 +00:00
9ab27bcd7e
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@957 a592a061-630c-0410-9148-cb99ea01b6c8
115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
// -*- C++ -*-
|
|
/* This file is part of
|
|
* =================================================
|
|
*
|
|
* LyX, The Document Processor
|
|
* Copyright 1995 Matthias Ettrich.
|
|
* Copyright 1995-2000 The LyX Team.
|
|
*
|
|
* This file Copyright 2000 Baruch Even
|
|
* ================================================= */
|
|
|
|
#ifndef GRAPHICSCACHEITEM_H
|
|
#define GRAPHICSCACHEITEM_H
|
|
|
|
#include <config.h>
|
|
|
|
#ifdef __GNUG__
|
|
#pragma interface
|
|
#endif
|
|
|
|
#include XPM_H_LOCATION
|
|
#include "LString.h"
|
|
#include "graphics/Renderer.h"
|
|
#include "support/syscall.h"
|
|
|
|
#include "sigc++/signal_system.h"
|
|
#ifdef SIGC_CXX_NAMESPACES
|
|
using SigC::Signal0;
|
|
#endif
|
|
|
|
/* (Baruch Even 2000-08-05)
|
|
* This has a major drawback: it is only designed for X servers, no easy
|
|
* porting to non X-server based platform is offered right now, this is done
|
|
* in order to get a first version out of the door.
|
|
*
|
|
* Later versions should consider how to do this with more platform
|
|
* independence, this will probably involve changing the Painter class too.
|
|
*/
|
|
|
|
/* (Baruch Even 2000-08-05)
|
|
* This should be made reference counted, but for the sake of initial design
|
|
* I'll forego that and just make a first version that actually works, though
|
|
* it may fail or leak in real document, this is an initial design to try
|
|
* ideas on and be a testbed.
|
|
* It may just as well be scraped later on to create a better design based on
|
|
* the results of working with the current design.
|
|
*/
|
|
|
|
/// A GraphicsCache item holder.
|
|
class GraphicsCacheItem {
|
|
public:
|
|
/// d-tor, frees the image structures.
|
|
~GraphicsCacheItem();
|
|
|
|
/// Get the height of the image. Returns -1 on error.
|
|
int getHeight() const { return height_; }
|
|
|
|
/// Get the width of the image. Returns -1 on error.
|
|
int getWidth() const { return width_; }
|
|
|
|
/// Return a pixmap that can be displayed on X server.
|
|
Pixmap getImage() const { return pixmap_; }
|
|
|
|
enum ImageStatus {
|
|
Loading = 1,
|
|
ErrorConverting,
|
|
ErrorReading,
|
|
Loaded
|
|
};
|
|
|
|
/// Is the pixmap ready for display?
|
|
ImageStatus getImageStatus() const { return imageStatus_; }
|
|
|
|
/// Get a notification when the image conversion is done.
|
|
/// used by an internal callback mechanism.
|
|
void imageConverted(int retval);
|
|
|
|
/// A signal objects can connect to in order to know when the image
|
|
/// has arrived.
|
|
Signal0<void> imageDone;
|
|
private:
|
|
/// Private c-tor so that only GraphicsCache can create an instance.
|
|
GraphicsCacheItem();
|
|
|
|
/// Set the filename this item will be pointing too.
|
|
bool setFilename(string const & filename);
|
|
|
|
/// Create an XPM file version of the image.
|
|
bool renderXPM(string const & filename);
|
|
|
|
/// Load the image from XPM to memory Pixmap
|
|
void loadXPMImage();
|
|
|
|
///
|
|
friend class GraphicsCache;
|
|
|
|
/// The file name of the XPM file.
|
|
string xpmfile;
|
|
/// The image height
|
|
int height_;
|
|
/// The image width
|
|
int width_;
|
|
/// Is the pixmap loaded?
|
|
ImageStatus imageStatus_;
|
|
/// The image pixmap
|
|
Pixmap pixmap_;
|
|
/// The rendering object.
|
|
Renderer * renderer;
|
|
|
|
/// The system caller, runs the convertor.
|
|
Systemcalls syscall;
|
|
};
|
|
|
|
#endif
|