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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
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 3 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, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#include "hsTypes.h"
#include "hsStream.h"
#include "hsExceptions.h"
#include "hsUtils.h"
#include "plPNG.h"
#include "../plGImage/plMipmap.h"
#include <png.h>
plMipmap *plPNG::IRead( hsStream *inStream )
{
plMipmap *newMipmap = NULL;
png_structp png_ptr;
png_infop info_ptr;
png_infop end_info;
try
{
// Check PNG Signature
png_byte sig[8];
inStream->Read8Bytes((char *) sig);
if (!png_sig_cmp(sig, 0, 8))
{
inStream->Rewind();
// Allocate required structs
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
throw( false );
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
throw( false );
}
end_info = png_create_info_struct(png_ptr);
if (!end_info)
{
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
throw( false );
}
// Clean up allocated structs
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
}
}
catch( ... )
{
if (newMipmap != NULL)
{
delete newMipmap;
newMipmap = NULL;
}
}
return newMipmap;
}
plMipmap* plPNG::ReadFromFile( const char *fileName )
{
wchar* wFilename = hsStringToWString(fileName);
plMipmap* retVal = ReadFromFile(wFilename);
delete [] wFilename;
return retVal;
}
plMipmap* plPNG::ReadFromFile( const wchar *fileName )
{
hsUNIXStream in;
if (!in.Open(fileName, L"rb"))
return false;
plMipmap* ret = IRead(&in);
in.Close();
return ret;
}
hsBool plPNG::IWrite( plMipmap *source, hsStream *outStream )
{
hsBool result = true;
try
{
}
catch( ... )
{
result = false;
}
return result;
}
hsBool plPNG::WriteToFile( const char *fileName, plMipmap *sourceData )
{
wchar* wFilename = hsStringToWString(fileName);
hsBool retVal = WriteToFile(wFilename, sourceData);
delete [] wFilename;
return retVal;
}
hsBool plPNG::WriteToFile( const wchar *fileName, plMipmap *sourceData )
{
hsUNIXStream out;
if (!out.Open(fileName, L"wb"))
return false;
hsBool ret = IWrite(sourceData, &out);
out.Close();
return ret;
}