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/*
* PARSEC - Interface/Utility Functions
*
* $Author: uberlinuxguy $ - $Date: 2004/09/26 03:43:42 $
*
* Orginally written by:
* Copyright (c) Markus Hadwiger <msh@parsec.org> 1998-2001
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// C library
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// compilation flags/debug support
#include "config.h"
#include "debug.h"
// general definitions
#include "general.h"
#include "objstruc.h"
// global externals
#include "globals.h"
// local module header
#include "img_api.h"
// proprietary module headers
#include "img_3df.h"
#include "img_jpg.h"
#include "img_tga.h"
#include "img_load.h"
#include "sys_path.h"
// image file saving
#include <stb_image/stb_image_write.h>
// image file extensions ------------------------------------------------------
//
static const char img_ext_raw[] = ".raw";
static const char img_ext_tga[] = ".tga";
static const char img_ext_3df[] = ".3df";
static const char img_ext_pcx[] = ".pcx";
static const char img_ext_bmp[] = ".bmp";
static const char img_ext_jpg[] = ".jpg";
static const char img_ext_png[] = ".png";
// determine format of specified image file -----------------------------------
//
int IMG_DetermineFormat( char *fname )
{
ASSERT( fname != NULL );
// determine image type from extension
char *fext = SYSs_ScanToExtension( fname );
//TODO:
// more elaborate checks (file sig or something).
if ( strcmp( fext, img_ext_raw ) == 0 )
return IMAGEFORMAT_RAW;
else if ( strcmp( fext, img_ext_tga ) == 0 )
return IMAGEFORMAT_TGA;
else if ( strcmp( fext, img_ext_3df ) == 0 )
return IMAGEFORMAT_3DF;
else if ( strcmp( fext, img_ext_pcx ) == 0 )
return IMAGEFORMAT_PCX;
else if ( strcmp( fext, img_ext_bmp ) == 0 )
return IMAGEFORMAT_BMP;
else if ( strcmp( fext, img_ext_jpg ) == 0 )
return IMAGEFORMAT_JPG;
else if ( strcmp( fext, img_ext_png ) == 0 )
return IMAGEFORMAT_PNG;
return IMAGEFORMAT_INVALID;
}
// determine pixel size of image buffer of specified format -------------------
//
int IMG_BufferPixelSize( int format )
{
int pixsiz = 0;
switch ( format ) {
case BUFFERFORMAT_INDEXED:
case BUFFERFORMAT_RGB_332:
case BUFFERFORMAT_ALPHA_8:
case BUFFERFORMAT_INTENSITY_8:
pixsiz = 1;
break;
case BUFFERFORMAT_RGB_555:
case BUFFERFORMAT_RGB_565:
case BUFFERFORMAT_ARGB_1555:
case BUFFERFORMAT_ARGB_4444:
case BUFFERFORMAT_AP_88:
case BUFFERFORMAT_AI_88:
pixsiz = 2;
break;
case BUFFERFORMAT_RGB_888:
pixsiz = 3;
break;
case BUFFERFORMAT_ARGB_8888:
pixsiz = 4;
break;
}
return pixsiz;
}
// copy buffer of one format to another buffer of another format --------------
//
int IMG_CopyConvertBuffer( char *dstbuff, int dstfmt, char *srcbuff, int srcfmt, size_t bsiz )
{
ASSERT( dstbuff != NULL );
ASSERT( srcbuff != NULL );
// just copy over if formats identical
if ( dstfmt == srcfmt ) {
memcpy( dstbuff, srcbuff, bsiz );
return TRUE;
}
//TODO:
return FALSE;
}
// save image buffer to a format supported by STB_image_write ------------------
//
PRIVATE
int IMG_SaveGenericTexture(const char *filename, const char *buffer, img_info_s *info)
{
ASSERT(info->width != 0);
ASSERT(info->height != 0);
ASSERT(info->buffsize != 0);
int components = info->buffsize / (info->width * info->height);
int success = FALSE;
switch (info->format) {
case IMAGEFORMAT_TGA:
success = stbi_write_tga(filename, info->width, info->height, components, buffer);
break;
case IMAGEFORMAT_PNG:
success = stbi_write_png(filename, info->width, info->height, components, buffer, 0);
break;
case IMAGEFORMAT_BMP:
success = stbi_write_bmp(filename, info->width, info->height, components, buffer);
break;
default:
break;
}
return success;
}
// save image buffer in specified format --------------------------------------
//
int IMG_SaveBuffer( const char *filename, char *buff, img_info_s *info )
{
ASSERT( filename != NULL );
ASSERT( buff != NULL );
ASSERT( info != NULL );
switch (info->format) {
case IMAGEFORMAT_PNG:
case IMAGEFORMAT_BMP:
if (IMG_SaveGenericTexture(filename, buff, info)) {
return TRUE;
}
MSGOUT("Couldn't save image \"%s\" to disk!\n", filename);
break;
case IMAGEFORMAT_TGA:
ASSERT((size_t)(info->width * info->height * 3) == info->buffsize);
return TGA_SaveBuffer(filename, buff, info->width, info->height);
break;
default:
MSGOUT("Couldn't save image \"%s\" to disk: unrecognized format\n", filename);
break;
}
// write buffer in RAW format
/*if ( info->format == IMAGEFORMAT_RAW ) {
size_t numwritten = fwrite( buff, 1, info->buffsize, fp );
return ( numwritten == info->buffsize );
}*/
/*
// write buffer in JPEG format
if ( info->format == IMAGEFORMAT_JPG ) {
ASSERT( (size_t)(info->width * info->height * 3) == info->buffsize );
return JPG_SaveBuffer( fp, buff, info->width, info->height );
}
*/
return FALSE;
}
// load texture from image file -----------------------------------------------
//
int IMG_LoadTexture( char *fname, int insertindex, char *loaderparams, texfont_s *texfont )
{
ASSERT( fname != NULL );
// determine texture format
int format = IMG_DetermineFormat( fname );
switch (format) {
case IMAGEFORMAT_3DF:
return TDF_LoadTexture( fname, insertindex, loaderparams, texfont );
break;
case IMAGEFORMAT_JPG:
case IMAGEFORMAT_PNG:
case IMAGEFORMAT_TGA:
return IMG_LoadGenericTexture(fname, insertindex, loaderparams, texfont);
break;
}
return FALSE;
}
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