mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 20:55:19 +00:00
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* 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 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef GRAPHICS_DECODERS_IMAGEDECODER_H
|
|
#define GRAPHICS_DECODERS_IMAGEDECODER_H
|
|
|
|
#include "common/scummsys.h"
|
|
#include "common/str.h"
|
|
|
|
namespace Common{
|
|
class SeekableReadStream;
|
|
}
|
|
|
|
namespace Graphics {
|
|
|
|
struct PixelFormat;
|
|
struct Surface;
|
|
|
|
/**
|
|
* A representation of an image decoder that maintains ownership of the surface
|
|
* and palette it decodes to.
|
|
*/
|
|
class ImageDecoder {
|
|
public:
|
|
virtual ~ImageDecoder() {}
|
|
|
|
/**
|
|
* Load an image from the specified stream
|
|
*
|
|
* @param stream the input stream
|
|
* @return whether loading the file succeeded
|
|
* @see getSurface
|
|
* @see getPalette
|
|
*/
|
|
virtual bool loadStream(Common::SeekableReadStream &stream) = 0;
|
|
|
|
/**
|
|
* Destroy this decoder's surface and palette
|
|
*/
|
|
virtual void destroy() = 0;
|
|
|
|
/**
|
|
* Get the decoded surface
|
|
*
|
|
* This surface is owned by this ImageDecoder and will remain valid
|
|
* until destroy() or loadStream() is called, or until this ImageDecoder's
|
|
* destructor is called.
|
|
*
|
|
* @return the decoded surface, or 0 if no surface is present
|
|
*/
|
|
virtual const Surface *getSurface() const = 0;
|
|
|
|
/**
|
|
* Get the decoded palette
|
|
*
|
|
* This palette is owned by this ImageDecoder and will remain valid
|
|
* until destroy() or loadStream() is called, or until this ImageDecoder's
|
|
* destructor is called.
|
|
*
|
|
* The palette's format is the same as PaletteManager's palette
|
|
* (interleaved RGB values).
|
|
*
|
|
* @return the decoded palette, or undefined if no palette is present
|
|
*/
|
|
virtual const byte *getPalette() const { return 0; }
|
|
|
|
/**
|
|
* Query if the decoded image has a palette.
|
|
*/
|
|
virtual bool hasPalette() const { return getPaletteColorCount() != 0; }
|
|
|
|
/** Return the starting index of the palette. */
|
|
virtual byte getPaletteStartIndex() const { return 0; }
|
|
/** Return the number of colors in the palette. */
|
|
virtual uint16 getPaletteColorCount() const { return 0; }
|
|
};
|
|
|
|
} // End of namespace Graphics
|
|
|
|
#endif
|