/*******************************************************************************

Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.

(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and

Jerremy Koot (jkoot@snes9x.com)

(c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)

(c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),

funkyass (funkyass@spam.shaw.ca),

Joel Yliluoma (http://iki.fi/bisqwit/)

Kris Bleakley (codeviolation@hotmail.com),

Matthew Kendora,

Nach (n-a-c-h@users.sourceforge.net),

Peter Bortas (peter@bortas.org) and

zones (kasumitokoduck@yahoo.com)

C4 x86 assembler and some C emulation code

(c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),

_Demo_ (_demo_@zsnes.com), and Nach

C4 C++ code

(c) Copyright 2003 Brad Jorsch

DSP-1 emulator code

(c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,

John Weidman, neviksti (neviksti@hotmail.com),

Kris Bleakley, Andreas Naive

DSP-2 emulator code

(c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and

Lord Nightmare (lord_nightmare@users.sourceforge.net

OBC1 emulator code

(c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and

Kris Bleakley

Ported from x86 assembler to C by sanmaiwashi

SPC7110 and RTC C++ emulator code

(c) Copyright 2002 Matthew Kendora with research by

zsKnight, John Weidman, and Dark Force

S-DD1 C emulator code

(c) Copyright 2003 Brad Jorsch with research by

Andreas Naive and John Weidman

S-RTC C emulator code

(c) Copyright 2001 John Weidman

ST010 C++ emulator code

(c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora

Super FX x86 assembler emulator code

(c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault

Super FX C emulator code

(c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman

SH assembler code partly based on x86 assembler code

(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)

Specific ports contains the works of other authors. See headers in

individual files.

Snes9x homepage: http://www.snes9x.com

Permission to use, copy, modify and distribute Snes9x in both binary and

source form, for non-commercial purposes, is hereby granted without fee,

providing that this license information and copyright notice appear with

all copies and any derived work.

This software is provided 'as-is', without any express or implied

warranty. In no event shall the authors be held liable for any damages

arising from the use of this software.

Snes9x is freeware for PERSONAL USE only. Commercial users should

seek permission of the copyright holders first. Commercial use includes

charging money for Snes9x or software derived from Snes9x.

The copyright holders request that bug fixes and improvements to the code

should be forwarded to them so everyone can benefit from the modifications

in future versions.

Super NES and Super Nintendo Entertainment System are trademarks of

Nintendo Co., Limited and its subsidiary companies.

*******************************************************************************/

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#ifndef __WIN32__

#include <unistd.h>

#else

#include <direct.h>

#endif

#include <string.h>

#include <fcntl.h>

#ifdef HAVE_LIBPNG

#include <png.h>

#endif

#include "snes9x.h"

#include "memmap.h"

#include "display.h"

#include "gfx.h"

#include "ppu.h"

#include "screenshot.h"

bool8 S9xDoScreenshot(int width, int height){

#ifdef HAVE_LIBPNG

FILE *fp;

png_structp png_ptr;

png_infop info_ptr;

png_color_8 sig_bit;

png_color pngpal[256];

int imgwidth;

int imgheight;

const char *fname=S9xGetFilename( FILE_SCREENSHOT );

#if 0

Settings.TakeScreenshot=FALSE;

#endif

if((fp=fopen(fname, "wb"))==NULL){

perror("Screenshot failed");

return FALSE;

}

png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);

if(!png_ptr){

fclose(fp);

unlink(fname);

return FALSE;

}

info_ptr=png_create_info_struct(png_ptr);

if(!info_ptr){

png_destroy_write_struct(&png_ptr, (png_infopp)NULL);

fclose(fp);

unlink(fname);

return FALSE;

}

if(setjmp(png_jmpbuf(png_ptr))){

perror("Screenshot: setjmp");

png_destroy_write_struct(&png_ptr, &info_ptr);

fclose(fp);

unlink(fname);

return FALSE;

}

imgwidth=width;

imgheight=height;

#if 0

if(Settings.StretchScreenshots==1){

if(width<=256 && height>SNES_HEIGHT_EXTENDED) imgwidth=width<<1;

if(width>256 && height<=SNES_HEIGHT_EXTENDED) imgheight=height<<1;

} else if(Settings.StretchScreenshots==2){

#endif

if(width<=256) imgwidth=width<<1;

if(height<=SNES_HEIGHT_EXTENDED) imgheight=height<<1;

#if 0

}

#endif

png_init_io(png_ptr, fp);

png_set_IHDR(png_ptr, info_ptr, imgwidth, imgheight, 8,

(PNG_COLOR_TYPE_RGB),

PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,

PNG_FILTER_TYPE_DEFAULT);

/* 5 bits per color */

sig_bit.red=5;

sig_bit.green=5;

sig_bit.blue=5;

png_set_sBIT(png_ptr, info_ptr, &sig_bit);

png_set_shift(png_ptr, &sig_bit);

png_write_info(png_ptr, info_ptr);

png_set_packing(png_ptr);

png_byte *row_pointer=new png_byte [png_get_rowbytes(png_ptr, info_ptr)];

uint8 *screen=GFX.Screen;

for(int y=0; y<height; y++, screen+=GFX.Pitch){

png_byte *rowpix = row_pointer;

for(int x=0; x<width; x++){

uint32 r, g, b;

DECOMPOSE_PIXEL((*(uint16 *)(screen+2*x)), r, g, b);

*(rowpix++) = r;

*(rowpix++) = g;

*(rowpix++) = b;

if(imgwidth!=width){

*(rowpix++) = r;

*(rowpix++) = g;

*(rowpix++) = b;

}

}

png_write_row(png_ptr, row_pointer);

if(imgheight!=height)

png_write_row(png_ptr, row_pointer);

}

delete [] row_pointer;

png_write_end(png_ptr, info_ptr);

png_destroy_write_struct(&png_ptr, &info_ptr);

fclose(fp);

fprintf(stderr, "%s saved.\n", fname);

return TRUE;

#else

perror("Screenshot support not available (libpng was not found at build time)");

return FALSE;

#endif

}