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Diffstat (limited to 'src/parsec/img_api.cpp')
| -rw-r--r-- | src/parsec/img_api.cpp | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/parsec/img_api.cpp b/src/parsec/img_api.cpp new file mode 100644 index 0000000..a2f3d53 --- /dev/null +++ b/src/parsec/img_api.cpp @@ -0,0 +1,253 @@ +/* + * 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; +} + + + |