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Add core JPEG reader, adapted from the JPEG plugin's decoder, with some changes to prevent include conflicts between the two decoders.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20836 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2009-05-01 23:24:23 +00:00
parent b22516f995
commit 60d4209383
9 changed files with 2262 additions and 68 deletions
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89
apps/plugins/test_core_jpeg.c Normal file
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/*****************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// __ \_/ ___\| |/ /| __ \ / __ \ \/ /
* Jukebox | | ( (__) ) \___| ( | \_\ ( (__) ) (
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 Andrew Mahone
*
* 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 "lib/grey.h"
PLUGIN_HEADER
/* different graphics libraries */
#if LCD_DEPTH < 8
#define USEGSLIB
GREY_INFO_STRUCT
#define MYLCD(fn) grey_ub_ ## fn
#define MYLCD_UPDATE()
#define MYXLCD(fn) grey_ub_ ## fn
#define CFORMAT &format_grey
#else
#define MYLCD(fn) rb->lcd_ ## fn
#define MYLCD_UPDATE() rb->lcd_update();
#define MYXLCD(fn) xlcd_ ## fn
#define CFORMAT NULL
#endif
/* this is the plugin entry point */
enum plugin_status plugin_start(const void* parameter)
{
size_t plugin_buf_len;
unsigned char * plugin_buf =
(unsigned char *)rb->plugin_get_buffer(&plugin_buf_len);
static char filename[MAX_PATH];
struct bitmap bm = {
.width = LCD_WIDTH,
.height = LCD_HEIGHT,
};
int ret;
if(!parameter) return PLUGIN_ERROR;
rb->strcpy(filename, parameter);
#ifdef USEGSLIB
long greysize;
if (!grey_init(plugin_buf, plugin_buf_len, GREY_ON_COP,
LCD_WIDTH, LCD_HEIGHT, &greysize))
{
rb->splash(HZ, "grey buf error");
return PLUGIN_ERROR;
}
plugin_buf += greysize;
plugin_buf_len -= greysize;
#endif
bm.data = plugin_buf;
ret = rb->read_jpeg_file(filename, &bm, plugin_buf_len,
FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
CFORMAT);
if (ret < 1)
return PLUGIN_ERROR;
#ifdef USEGSLIB
grey_show(true);
grey_ub_gray_bitmap((fb_data *)bm.data, (LCD_WIDTH - bm.width) >> 1,
(LCD_HEIGHT - bm.height) >> 1, bm.width, bm.height);
#else
rb->lcd_bitmap((fb_data *)bm.data, (LCD_WIDTH - bm.width) >> 1,
(LCD_HEIGHT - bm.height) >> 1, bm.width, bm.height);
#endif
MYLCD_UPDATE();
while (rb->get_action(CONTEXT_STD,1) != ACTION_STD_OK) rb->yield();
#ifdef USEGSLIB
grey_release();
#endif
return PLUGIN_OK;
}