root/src/blocks/bitmap.c

DEFINITIONS

1. destroySWFBitmap
2. SWFBitmap_getWidth
3. SWFBitmap_getHeight
4. newSWFBitmap_fromInput
5. newSWFBitmap_fromRawImg

/*
    Ming, an SWF output library
    Copyright (C) 2002  Opaque Industries - http://www.opaque.net/

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/* $Id: bitmap.c,v 1.18 2008/02/14 11:52:14 krechert Exp $ */
#include <stdlib.h>

#include "bitmap.h"
#include "rect.h"
#include "jpeg.h"
#include "dbl.h"
#include "error.h"
#include "input.h"
#include "libming.h"

#if USE_ZLIB
#include "zlib.h"

// workarround for zlib previous 1.2.x
#ifndef compressBound
#define compressBound(__slen) ((__slen) + ((__slen) >> 12) + ((__slen) >> 14) + 11)
#endif

#endif

void destroySWFBitmap(SWFBitmap bitmap)
{
        // this will acall bitmap->dtor;
        destroySWFBlock((SWFBlock) bitmap);
}


int SWFBitmap_getWidth(SWFBitmap b)
{
        return SWFRect_getWidth(CHARACTER(b)->bounds);
}


int SWFBitmap_getHeight(SWFBitmap b)
{
        return SWFRect_getHeight(CHARACTER(b)->bounds);
}


#define JPEG_MARKER 0xFF
#define JPEG_SOI        0xD8

SWFBitmap newSWFBitmap_fromInput(SWFInput input)
{
        int c1 = SWFInput_getChar(input);
        int c2 = SWFInput_getChar(input);
        int c3 = SWFInput_getChar(input);

        SWFInput_rewind(input);

        if(c1 == JPEG_MARKER && c2 == JPEG_SOI)
                return (SWFBitmap)newSWFJpegBitmap_fromInput(input);

        if(c1 == 'D' && c2 == 'B')
                return (SWFBitmap) newSWFDBLBitmap_fromInput(input);

        if(c1 == 'G' && c2 == 'I')
#if USE_GIF
                return (SWFBitmap) newSWFDBLBitmapData_fromGifInput(input);
#else
                SWF_error("GIF images must be translated into DBL files for now");
#endif

        if(c2 == 'P' && c3 == 'N')
#if USE_PNG
                return (SWFBitmap) newSWFDBLBitmapData_fromPngInput(input);
#else
                SWF_error("PNG images must be translated into DBL files for now");
#endif

        SWF_error("Unrecognised file type");

        return NULL;
}


SWFBitmap newSWFBitmap_fromRawImg(unsigned char *raw, 
                                  SWFRawImgFmt srcFmt, SWFBitmapFmt dstFmt,
                                  unsigned short width, unsigned short height)
{
#if USE_ZLIB
        struct dbl_data image;
        uLongf insize, outsize;
        int ret;
        SWFBitmap return_data;
        unsigned char *tmp;

        switch(srcFmt)
        {
                case SWF_RAWIMG_ARGB:
                        tmp = raw;
                        break;
                default:
                        SWF_warn("newSWFBitmap_fromRawImg: unknown img format\n");
                        return NULL;
        }

        image.width = width;
        image.height = height;
        image.hasalpha = 1;
        image.format = 5;
        
        insize = width * height * 4;
        outsize = compressBound(insize);
        image.data = (unsigned char*) malloc(outsize);

        /* If malloc failed, return NULL to signify this */
        if (NULL == image.data)
                return NULL;

        ret = compress2(image.data, &outsize, (Bytef *)tmp, insize, 9);
        if(ret != Z_OK)
        {
                free(image.data);
                return NULL;
        }
        image.length = outsize;

        return_data = (SWFBitmap)newSWFDBLBitmapData_fromData(&image);

        /* If newSWFDBLBitmapData_fromData() failed, return NULL to signify this */
        if (NULL == return_data)
        {
                free(image.data);
                return NULL;
        }

        return return_data;
#else
        SWF_warn("newSWFBitmap_fromRawImg: depends on zlib support\n");
        return NULL;
#endif
} 

/*
 * Local variables:
 * tab-width: 2
 * c-basic-offset: 2
 * End:
 */