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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_jpeg_provider_generic
#define header_jpeg_provider_generic
#if _MSC_VER > 1000
#pragma once
#endif
#if _MSC_VER >= 1300
#define HAVE_BOOLEAN
#endif
#ifdef WIN32
#define XMD_H
#endif
#include <stdio.h>
extern "C"
{
#undef FAR
#ifdef __APPLE__
#include <libjpeg/jpeglib.h>
#else
#include <jpeglib.h>
#endif
}
#include "API/Display/Providers/jpeg_provider.h"
#include "Display/pixel_buffer_generic.h"
#include "API/Core/IOData/inputsource.h"
#include "API/Core/IOData/inputsource_provider.h"
class CL_InputSourceProvider;
//: Surface provider that can load JPEG (.jpg) files.
class CL_JPEGProvider_Generic : public CL_PixelBuffer_Generic
{
//! Construction:
public:
//: Constructs a surface provider that can read JPEG files.
CL_JPEGProvider_Generic(
const std::string &name,
CL_InputSourceProvider *provider);
~CL_JPEGProvider_Generic();
//! Attributes:
public:
//: Returns the pitch of the image (bytes per line).
unsigned int get_pitch() const { return pitch; }
//: Returns the width of the image.
unsigned int get_width() const { return width; }
//: Returns the height of the image.
unsigned int get_height() const { return height; }
//: Returns the number of subsprites in the image.
unsigned int get_num_frames() const { return 1; }
//: Returns the pixelformat used by the image.
// EPixelFormat get_pixel_format() const { return RGB888; }
//: Returns the red color mask used by the target.
unsigned int get_red_mask() const;
//: Returns the green color mask by the target.
unsigned int get_green_mask() const;
//: Returns the blue color mask by the target.
unsigned int get_blue_mask() const;
//: Returns the alpha mask by the target.
unsigned int get_alpha_mask() const;
//! Operations:
public:
//: Returns the image data. Provider must be locked before pointer is valid.
void *get_data();
//: Reference counted lock function. Allocate pixel buffer in this function.
virtual void perform_lock() { return; }
//: Reference counted unlock function. Free pixel buffer in this function.
virtual void perform_unlock() { return; }
//: Loads the JPEG data into the pixel buffer.
void init();
//: Cleans up.
void deinit();
//! Implementation:
private:
// Functions for managing the input handling
static void jpeg_InputSource_src (j_decompress_ptr cinfo, CL_JPEGProvider_Generic* prov);
static void init_source (j_decompress_ptr cinfo);
static boolean fill_input_buffer (j_decompress_ptr cinfo);
static void skip_input_data (j_decompress_ptr cinfo, long num_bytes);
static void term_source (j_decompress_ptr cinfo);
std::string filename;
unsigned char *image;
int pitch;
int width, height;
int bpp;
int pos;
typedef struct
{
struct jpeg_source_mgr pub; /* public fields */
CL_JPEGProvider_Generic* jpeg_provider; /* source stream */
JOCTET * buffer; /* start of buffer */
boolean start_of_file; /* have we gotten any data yet? */
} InputSource_source_mgr;
typedef InputSource_source_mgr* InputSource_src_ptr;
CL_InputSourceProvider* input_provider;
CL_InputSource* input_source;
};
#endif
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