kicad-source/common/asset_archive.cpp
Jon Evans 18037e2f65 Rework bitmap system to load from archived PNGs
Bitmaps are now identified by an enum class instead of by pointers.
Bitmap loading and caching is now handled by a class in common, and
we no longer compile most bitmaps into the binary, so there is no
longer a bitmaps static library.

Instead, bitmaps are archived to a .tar.gz file which is installed
in ${KICAD_DATA}/resources/images.tar.gz

The source PNGs are checked in to Git as the original CPP files were,
so that people can build without the required dependencies to convert
SVGs to PNGs.

Initial support is also added for dark theme icons, although this
is not yet exposed in the GUI.

Stubs are present for multi-resolution image resources, but this is
not fully-baked yet and could use some refinement.
2021-03-11 08:37:35 -05:00

106 lines
2.6 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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/>.
*/
#include <wx/tarstrm.h>
#include <wx/wfstream.h>
#include <wx/zstream.h>
#include <asset_archive.h>
ASSET_ARCHIVE::ASSET_ARCHIVE( const wxString& aFilePath, bool aLoadNow ) :
m_filePath( aFilePath )
{
if( aLoadNow )
Load();
}
bool ASSET_ARCHIVE::Load()
{
// We don't support hot-reloading yet
if( !m_fileInfoCache.empty() )
return false;
wxFFileInputStream zipFile( m_filePath );
if( !zipFile.IsOk() )
return false;
wxZlibInputStream stream( zipFile, wxZLIB_GZIP );
wxTarInputStream tarStream( stream );
wxTarEntry* entry;
// Avoid realloc while reading: we're not going to get better than 2:1 compression
m_cache.resize( 2 * zipFile.GetLength() );
size_t offset = 0;
while( ( entry = tarStream.GetNextEntry() ) )
{
if( entry->IsDir() )
continue;
size_t length = entry->GetSize();
FILE_INFO fi;
fi.offset = offset;
fi.length = length;
if( offset + length > m_cache.size() )
m_cache.resize( m_cache.size() * 2 );
tarStream.Read( &m_cache[offset], length );
m_fileInfoCache[entry->GetName()] = fi;
offset += length;
}
m_cache.resize( offset );
return true;
}
long ASSET_ARCHIVE::GetFileContents( const wxString& aFilePath, const unsigned char* aDest,
size_t aMaxLen )
{
wxFAIL_MSG( "Unimplemented" );
return 0;
}
long ASSET_ARCHIVE::GetFilePointer( const wxString& aFilePath, const unsigned char** aDest )
{
if( aFilePath.IsEmpty() )
return -1;
wxASSERT( aDest );
if( !m_fileInfoCache.count( aFilePath ) )
return -1;
const FILE_INFO& fi = m_fileInfoCache.at( aFilePath );
*aDest = &m_cache[fi.offset];
return fi.length;
}