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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#ifndef header_pixel_buffer_generic
#define header_pixel_buffer_generic
#if _MSC_VER > 1000
#pragma once
#endif
#include "API/Display/pixel_format.h"
#include "API/Display/palette.h"
//: Pixel data implementation interface.
class CL_PixelBuffer_Generic
{
//! Construction:
public:
CL_PixelBuffer_Generic() : lock_count(0), ref_count(0) { return; }
virtual ~CL_PixelBuffer_Generic() { return; }
//! Attributes:
public:
//: Buffer pixel format description.
CL_PixelFormat format;
//: Palette, if 8 bpp pixel format.
CL_Palette palette;
//: Buffer scanline pitch.
unsigned int pitch;
//: Buffer width.
int width;
//: Buffer height.
int height;
//: Lock reference count.
int lock_count;
//! Operations:
public:
//: Returns a pointer to the beginning of the pixel buffer. Pointer
//: is only valid inside a lock/unlock session.
virtual void *get_data()=0;
//: Reference counted lock function. Allocate pixel buffer in this function.
virtual void perform_lock()=0;
//: Reference counted unlock function. Free pixel buffer in this function.
virtual void perform_unlock()=0;
int add_ref() { return ++ref_count; }
int release_ref()
{
ref_count--;
if (ref_count == 0) { delete this; return 0; }
return ref_count;
}
//: Converts between two RGBA formats.
static void convert(
void* in_buffer,
const CL_PixelFormat& in_pf,
int in_pitch,
void* out_buffer,
const CL_PixelFormat& out_pf,
int out_pitch,
const CL_Size& size);
//: Converts from palette format to RGBA.
static void convert_pal(
void* in_buffer,
const CL_PixelFormat& in_pf,
int in_pitch,
const CL_Palette& in_pal,
void* out_buffer,
const CL_PixelFormat& out_pf,
int out_pitch,
const CL_Size& size);
//! Implementation:
private:
int ref_count;
};
#endif
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