gecko-dev/lib/libcnv/libcnv.c

331 строка
10 KiB
C
Исходник Обычный вид История

1998-03-28 05:44:41 +03:00
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "xp_core.h" //used to make library compile faster on win32 do not ifdef this or it wont work
#include <memory.h>
#include <stdio.h>
#include <malloc.h>
#include "xp_core.h"/*defines of int32 ect*/
#include "xpassert.h"
#include "xp_mcom.h"/*XP_STRDUP command*/
#include "ntypes.h" /*for mwcontext for callback routines*/
#include "libcnv.h"
#include "readbmp.h"
#include "writejpg.h"
//#include "writepng.h"
/*the following 4 includes are for the color quantization wrapper to colorqnt.h*/
#include "pbmplus.h"
#include "ppm.h"
#include "ppmcmap.h"
#include "colorqnt.h"
/*accepts a stream of bytes that will be read in and converted to a JPEG/GIF FILE
jpeg/gif file (default to p_output default) stream that is returned
: you are responsible for free'ing the returned memory*/
typedef void * LPVOID;
CONVERT_IMG_INFO *create_img_info();
void copy_img_info(CONVERT_IMG_INFO *p_dest,CONVERT_IMG_INFO *p_origin);
void destroy_img_info(CONVERT_IMG_INFO *p_info);
void clean_convert_img_array(CONVERT_IMG_ARRAY array,int16 count);
/*PUBLIC API*/
convimgenum
select_file_type (CONVERT_IMGCONTEXT * p_input)
{
int16 c;
if ((c = getc(p_input->m_stream.m_file)) == EOF)
return conv_unknown;
if (ungetc(c, p_input->m_stream.m_file) == EOF)
return conv_unknown;
switch (c) {
case 'B':
p_input->m_imagetype=conv_bmp;
return conv_bmp;
default:
p_input->m_imagetype=conv_unknown;
return conv_unknown;
break;
}
return conv_unknown; /* suppress compiler warnings */
}
/*PUBLIC API*/
CONVERT_IMAGERESULT
convert_quantize_pixels(CONVERT_IMG_ARRAY imagearray,int16 imagewidth,int16 imageheight,int16 maxcolorvalue)
{
/*wrapper for colorqnt.cpp we just want to change the pixels, we dont need any info*/
CONVERT_IMAGERESULT t_result;
int16 t_dummycolors;
colorhist_vector t_dummyvector;
t_result=quantize_colors(imagearray,imagewidth,imageheight,&maxcolorvalue,&t_dummycolors,&t_dummyvector);
if ( t_dummyvector == (colorhist_vector) 0 )
return t_result;
ppm_freecolorhist( t_dummyvector );
return t_result;
}
CONVERT_IMG_INFO *create_img_info()
{
return calloc (1,sizeof(CONVERT_IMG_INFO));
}
void destroy_img_info(CONVERT_IMG_INFO *p_info)
{
if (p_info)
{
if (p_info->m_colormap)
free(p_info->m_colormap);
free (p_info);
}
}
void copy_img_info(CONVERT_IMG_INFO *p_dest,CONVERT_IMG_INFO *p_origin)
{
XP_ASSERT(p_dest);
XP_ASSERT(p_origin);
memcpy(p_dest,p_origin,sizeof(CONVERT_IMG_INFO));/*shallow copy!!*/
}
/*PUBLIC API*/
CONVERT_IMAGERESULT convert_stream2image(CONVERT_IMGCONTEXT p_input,CONVERT_IMG_INFO *p_imageinfo,int16 p_numoutputs,char **p_outputfilenames) /*0== OK <0 == user cancel >0 == error*/
{
CONVERT_IMGCONTEXT *t_outputparams;
CONVERT_IMG_INFO *t_imageinfo=NULL;
CONVERT_IMG_ARRAY t_rowarray=NULL;
convimgenum t_outputtype;
CONVERT_IMAGERESULT t_err;
int16 i;
XP_ASSERT(p_imageinfo);
if ((!p_numoutputs)||(!p_imageinfo))
return CONVERR_INVALIDDEST;
if ((conv_unknown==p_input.m_imagetype)&&(CONVERT_MEMORY==p_input.m_stream.m_type)) /*dont know what it is and its not a file!*/
return CONVERR_INVALIDSOURCE;/*reading unknown stream??*/
t_outputparams=calloc(p_numoutputs,sizeof(CONVERT_IMGCONTEXT));
if (!t_outputparams)
return CONVERR_OUTOFMEMORY;
else if ((conv_unknown==p_input.m_imagetype)&&(CONVERT_FILE==p_input.m_stream.m_type))
{
/*read in header info*/
if (conv_unknown==select_file_type(&p_input))
return CONVERR_INVALIDSOURCE;/*read file header and tell me what kind it is. also fill info into p_input*/
}
t_imageinfo=create_img_info();
if (conv_bmp==p_input.m_imagetype) /*bitmap*/
{
t_err=start_input_bmp(t_imageinfo,&p_input);
if (t_err==CONV_OK)
{
#if 0
if (t_imageinfo->m_bitsperpixel<=8)/*256Colors GIF ..check colorspace*/
t_outputtype=conv_png;
else /* >8 means use JPEG*/
#endif /*no png support for composer yet*/
t_outputtype=conv_jpeg;
for (i=0;i<p_numoutputs;i++)/*need to set defaults for outputs*/
{
t_outputparams[i].m_imagetype=t_outputtype;
t_outputparams[i].m_callbacks=p_input.m_callbacks;
}
t_err==finish_input_bmp(t_imageinfo,&p_input,&t_rowarray);
if (t_err!=CONV_OK)
{
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
destroy_img_info(t_imageinfo);
return t_err;
}
}
else
{
destroy_img_info(t_imageinfo);
return t_err;
}
}
/*PICT CRAP HERE AS WELL AS XPM*/
else
{
destroy_img_info(t_imageinfo);
return CONVERR_INVALIDSOURCE;
}
/*callback: this must give us the information on how to convert the image. in case of JPEG, give us the same as parse_switches in the JPEG libraries
they can change t_defaultoutput if they must and change t_imageinfo for default values i.e. color quantization*/
if (!p_input.m_callbacks.m_dialogimagecallback)
{
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
destroy_img_info(t_imageinfo);
return CONV_CANCEL;
}
t_err=(*p_input.m_callbacks.m_dialogimagecallback)(&p_input,t_outputparams,t_imageinfo,p_numoutputs,t_rowarray);
if (CONV_OK!=t_err)
{
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
destroy_img_info(t_imageinfo);
return t_err;
}
for (i=0;i<p_numoutputs;i++)
{
if (t_outputparams[i].m_stream.m_type!=CONVERT_FILE)
{
/* And we're done! */
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
destroy_img_info(t_imageinfo);
return t_err;
}
//copying strings to p_outputfilenames[i]
if (p_outputfilenames)
p_outputfilenames[i]=XP_STRDUP(t_outputparams[i].m_filename);
switch(t_outputparams[i].m_imagetype)
{
case conv_jpeg:
{
t_err=write_JPEG_file(t_rowarray,&t_outputparams[i],t_imageinfo,p_input.m_callbacks);
if (t_err!=CONV_OK)
{
/* And we're done! */
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
destroy_img_info(t_imageinfo);
return t_err;
}
}
break;
#if 0
case conv_png:
{
/*color quantization*/
t_err=write_PNG_file(t_rowarray,&(t_outputparams[i]),t_imageinfo,p_input.m_callbacks);
if (t_err!=CONV_OK)
{
/* And we're done! */
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
destroy_img_info(t_imageinfo);
return t_err;
}
}
break;
#endif //no png support for composer yet
case conv_plugin: /*plugin*/
{
/* to be safe we will clear colormap out out p_outputinfos*/
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
copy_img_info(p_imageinfo,t_imageinfo);/*shallow copy! no colormap*/
destroy_img_info(t_imageinfo);/*the color map is destroyed here */
return CONV_OK; /*get rid of compiler warnings*/
}
break;
default:
{
/* to be safe we will clear colormap out out p_outputinfos*/
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
copy_img_info(p_imageinfo,t_imageinfo);/*shallow copy! no colormap*/
destroy_img_info(t_imageinfo);/*the color map is destroyed here */
return CONVERR_INVALIDDEST;
}
break;
}
}
/* to be safe we will clear colormap out out p_outputinfos*/
clean_convert_img_array(t_rowarray,t_imageinfo->m_image_height);
copy_img_info(p_imageinfo,t_imageinfo);/*shallow copy! no colormap*/
destroy_img_info(t_imageinfo);/*the color map is destroyed here */
if (p_input.m_callbacks.m_completecallback) //its OK to be null
t_err=(*p_input.m_callbacks.m_completecallback)(t_outputparams,p_numoutputs,p_input.m_pMWContext);
else
t_err=CONV_OK;
return t_err;
}
/*
this clean function assumes the array has been cleared to 0 before being used.
*/
void clean_convert_img_array(CONVERT_IMG_ARRAY array,int16 count)
{
int16 i;
if (!array)
return;
for (i=0;i<count;i++)
if (array[i])
free(array[i]);
free(array);
}
int16 read_mem_stream(CONVERT_IMG_STREAM *p_stream,void *p_dest,uint16 p_bytecount)
{
XP_ASSERT(p_stream);
if ((p_stream->m_streamsize==0) ||((p_stream->m_currentindex+(DWORD)p_bytecount)<p_stream->m_streamsize))
{
memcpy(p_dest,p_stream->m_mem+p_stream->m_currentindex,p_bytecount);
p_stream->m_currentindex+=p_bytecount;
return p_bytecount;
}
return 0;/*read past end of stream*/
}
BYTE read_mem_stream_byte(CONVERT_IMG_STREAM *p_stream)
{
XP_ASSERT(p_stream);
if ((p_stream->m_streamsize==0) ||((p_stream->m_currentindex+1)<p_stream->m_streamsize))
{
return p_stream->m_mem[p_stream->m_currentindex++];
}
XP_ASSERT(0);
return 0;/*read past end of stream*/
}
int16 read_param(CONVERT_IMG_STREAM *p_input,void *p_dest,uint16 p_bytecount)
{
XP_ASSERT(p_input);
if (CONVERT_MEMORY==p_input->m_type)
return read_mem_stream(p_input,p_dest,p_bytecount);
else if (CONVERT_FILE==p_input->m_type)
return ReadOK(p_input->m_file,p_dest,p_bytecount);
else
{
XP_ASSERT(0);
return -1;
}
}
BYTE read_param_byte(CONVERT_IMG_STREAM *p_input)
{
XP_ASSERT(p_input);
if (CONVERT_MEMORY==p_input->m_type)
return read_mem_stream_byte(p_input);
else if (CONVERT_FILE==p_input->m_type)
return (BYTE) getc(p_input->m_file);
else
{
XP_ASSERT(0);
return 0;
}
}