6e3da841be
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29012 a1c6a512-1295-4272-9138-f99709370657
136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* load image decoder.
|
|
*
|
|
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "plugin.h"
|
|
#include "imageviewer.h"
|
|
#include "image_decoder.h"
|
|
|
|
static const char *decoder_names[MAX_IMAGE_TYPES] = {
|
|
"bmp",
|
|
"jpeg",
|
|
"png",
|
|
#ifdef HAVE_LCD_COLOR
|
|
"ppm"
|
|
#endif
|
|
};
|
|
|
|
/* check file type by extention */
|
|
enum image_type get_image_type(const char *name)
|
|
{
|
|
static const struct {
|
|
char *ext;
|
|
enum image_type type;
|
|
} ext_list[] = {
|
|
{ ".bmp", IMAGE_BMP },
|
|
{ ".jpg", IMAGE_JPEG },
|
|
{ ".jpe", IMAGE_JPEG },
|
|
{ ".jpeg", IMAGE_JPEG },
|
|
{ ".png", IMAGE_PNG },
|
|
#ifdef HAVE_LCD_COLOR
|
|
{ ".ppm", IMAGE_PPM },
|
|
#endif
|
|
};
|
|
|
|
const char *ext = rb->strrchr(name, '.');
|
|
int i;
|
|
if (!ext)
|
|
return IMAGE_UNKNOWN;
|
|
|
|
for (i = 0; i < (int)ARRAYLEN(ext_list); i++)
|
|
{
|
|
if (!rb->strcasecmp(ext, ext_list[i].ext))
|
|
return ext_list[i].type;
|
|
}
|
|
return IMAGE_UNKNOWN;
|
|
}
|
|
|
|
static void *decoder_handle = NULL;
|
|
const struct image_decoder *load_decoder(struct loader_info *loader_info)
|
|
{
|
|
const char *name;
|
|
char filename[MAX_PATH];
|
|
struct imgdec_header *hdr;
|
|
struct lc_header *lc_hdr;
|
|
|
|
if (loader_info->type < 0 || loader_info->type >= MAX_IMAGE_TYPES)
|
|
{
|
|
rb->splashf(2*HZ, "Unknown type: %d", loader_info->type);
|
|
goto error;
|
|
}
|
|
|
|
release_decoder();
|
|
|
|
name = decoder_names[loader_info->type];
|
|
rb->snprintf(filename, MAX_PATH, VIEWERS_DIR "/%s.ovl", name);
|
|
|
|
/* load decoder to the buffer. */
|
|
decoder_handle = rb->lc_open(filename, loader_info->buffer, loader_info->size);
|
|
if (!decoder_handle)
|
|
{
|
|
rb->splashf(2*HZ, "Can't open %s", filename);
|
|
goto error;
|
|
}
|
|
|
|
hdr = rb->lc_get_header(decoder_handle);
|
|
if (!hdr)
|
|
{
|
|
rb->splash(2*HZ, "Can't get header");
|
|
goto error_close;
|
|
}
|
|
lc_hdr = &hdr->lc_hdr;
|
|
|
|
if (lc_hdr->magic != PLUGIN_MAGIC || lc_hdr->target_id != TARGET_ID)
|
|
{
|
|
rb->splashf(2*HZ, "%s decoder: Incompatible model.", name);
|
|
goto error_close;
|
|
}
|
|
|
|
if (lc_hdr->api_version != IMGDEC_API_VERSION)
|
|
{
|
|
rb->splashf(2*HZ, "%s decoder: Incompatible version.", name);
|
|
goto error_close;
|
|
}
|
|
|
|
*(hdr->api) = rb;
|
|
*(hdr->img_api) = loader_info->iv;
|
|
|
|
/* set remaining buffer size to loader_info. decoder will
|
|
* be loaded to the end of the buffer, so fix size only. */
|
|
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
|
|
loader_info->size = lc_hdr->load_addr - loader_info->buffer;
|
|
#endif
|
|
|
|
return hdr->decoder;
|
|
|
|
error_close:
|
|
release_decoder();
|
|
error:
|
|
return NULL;
|
|
}
|
|
|
|
void release_decoder(void)
|
|
{
|
|
if (decoder_handle != NULL)
|
|
{
|
|
rb->lc_close(decoder_handle);
|
|
decoder_handle = NULL;
|
|
}
|
|
}
|