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/*
* 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.
*/
#include "sdluio.h"
#include "port.h"
#include "libs/uio.h"
#include SDL_INCLUDE(SDL.h)
#include SDL_INCLUDE(SDL_error.h)
#include SDL_INCLUDE(SDL_rwops.h)
#include "libs/memlib.h"
#include "png2sdl.h"
#include <errno.h>
#include <string.h>
static SDL_RWops *sdluio_makeRWops (uio_Stream *stream);
#if 0
// For use for initialisation, using structure assignment.
static SDL_RWops sdluio_templateRWops =
{
.seek = sdluio_seek,
.read = sdluio_read,
.write = sdluio_write,
.close = sdluio_close,
};
#endif
SDL_Surface *
sdluio_loadImage (uio_DirHandle *dir, const char *fileName) {
uio_Stream *stream;
SDL_RWops *rwops;
SDL_Surface *result = NULL;
stream = uio_fopen (dir, fileName, "rb");
if (stream == NULL)
{
SDL_SetError ("Couldn't open '%s': %s", fileName,
strerror(errno));
return NULL;
}
rwops = sdluio_makeRWops (stream);
if (rwops) {
result = TFB_png_to_sdl (rwops);
SDL_RWclose (rwops);
}
return result;
}
#if SDL_MAJOR_VERSION == 1
int
sdluio_seek (SDL_RWops *context, int offset, int whence)
#else
Sint64
sdluio_seek (SDL_RWops *context, Sint64 offset, int whence)
#endif
{
if (uio_fseek ((uio_Stream *) context->hidden.unknown.data1, offset,
whence) == -1)
{
SDL_SetError ("Error seeking in uio_Stream: %s",
strerror(errno));
return -1;
}
return uio_ftell ((uio_Stream *) context->hidden.unknown.data1);
}
#if SDL_MAJOR_VERSION == 1
int
sdluio_read (SDL_RWops *context, void *ptr, int size, int maxnum)
#else
size_t
sdluio_read (SDL_RWops *context, void *ptr, size_t size, size_t maxnum)
#endif
{
size_t numRead;
numRead = uio_fread (ptr, (size_t) size, (size_t) maxnum,
(uio_Stream *) context->hidden.unknown.data1);
if (numRead == 0 && uio_ferror ((uio_Stream *)
context->hidden.unknown.data1))
{
SDL_SetError ("Error reading from uio_Stream: %s",
strerror(errno));
return 0;
}
return (int) numRead;
}
#if SDL_MAJOR_VERSION == 1
int
sdluio_write (SDL_RWops *context, const void *ptr, int size, int num)
#else
size_t
sdluio_write (SDL_RWops *context, const void *ptr, size_t size, size_t num)
#endif
{
size_t numWritten;
numWritten = uio_fwrite (ptr, (size_t) size, (size_t) num,
(uio_Stream *) context->hidden.unknown.data1);
if (numWritten == 0 && uio_ferror ((uio_Stream *)
context->hidden.unknown.data1))
{
SDL_SetError ("Error writing to uio_Stream: %s",
strerror(errno));
return 0;
}
return (size_t) numWritten;
}
int
sdluio_close (SDL_RWops *context) {
int result;
result = uio_fclose ((uio_Stream *) context->hidden.unknown.data1);
HFree (context);
return result;
}
static SDL_RWops *
sdluio_makeRWops (uio_Stream *stream) {
SDL_RWops *result;
result = HMalloc (sizeof (SDL_RWops));
#if 0
*(struct SDL_RWops *) result = sdluio_templateRWops;
// structure assignment
#endif
result->seek = sdluio_seek;
result->read = sdluio_read;
result->write = sdluio_write;
result->close = sdluio_close;
result->hidden.unknown.data1 = stream;
return result;
}
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