kicad/eeschema/gfx_import_utils.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2023 Alex Shvartzkop <dudesuchamazing@gmail.com>
* Copyright (C) 2023 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 2
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "gfx_import_utils.h"
#include <stdint.h>
#include <lib_symbol.h>
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#include <sch_shape.h>
#include <import_gfx/graphics_importer_lib_symbol.h>
#include <import_gfx/svg_import_plugin.h>
std::unordered_map<uint32_t, SHAPE_POLY_SET> ConvertImageToPolygons( wxImage img,
VECTOR2D pixelScale )
{
bool hasAlpha = img.HasAlpha();
// Quantize the image
for( int y = 0; y < img.GetHeight(); y++ )
{
for( int x = 0; x < img.GetWidth(); x++ )
{
int r = img.GetRed( x, y );
int g = img.GetGreen( x, y );
int b = img.GetBlue( x, y );
int a = hasAlpha ? img.GetAlpha( x, y ) : 255;
int roundBits = 5; // 32
r = std::min( r >> roundBits << roundBits, 0xFF );
g = std::min( g >> roundBits << roundBits, 0xFF );
b = std::min( b >> roundBits << roundBits, 0xFF );
a = std::min( a >> roundBits << roundBits, 0xFF );
img.SetRGB( x, y, r, g, b );
if( hasAlpha )
img.SetAlpha( x, y, a );
}
}
std::unordered_map<uint32_t, SHAPE_POLY_SET> colorPolys;
// Create polygon sets
for( int y = 0; y < img.GetHeight(); y++ )
{
for( int x = 0; x < img.GetWidth(); x++ )
{
uint32_t r = img.GetRed( x, y );
uint32_t g = img.GetGreen( x, y );
uint32_t b = img.GetBlue( x, y );
uint32_t a = hasAlpha ? img.GetAlpha( x, y ) : 255;
if( a > 0 )
{
uint32_t color = r | ( g << 8 ) | ( b << 16 ) | ( a << 24 );
SHAPE_POLY_SET& colorPoly = colorPolys[color];
SHAPE_LINE_CHAIN chain;
chain.Append( x * pixelScale.x, y * pixelScale.y, true );
chain.Append( ( x + 1 ) * pixelScale.x, y * pixelScale.y, true );
chain.Append( ( x + 1 ) * pixelScale.x, ( y + 1 ) * pixelScale.y, true );
chain.Append( x * pixelScale.x, ( y + 1 ) * pixelScale.y, true );
chain.SetClosed( true );
colorPoly.AddOutline( chain );
}
}
}
for( auto& [color, polySet] : colorPolys )
{
polySet.Simplify( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
for( int i = 0; i < polySet.OutlineCount(); i++ )
{
SHAPE_POLY_SET::POLYGON& poly = polySet.Polygon( i );
for( SHAPE_LINE_CHAIN& chain : poly )
chain.Simplify();
}
}
return colorPolys;
}
void ConvertImageToLibShapes( LIB_SYMBOL* aSymbol, int unit, wxImage img, VECTOR2D pixelScale,
VECTOR2D offset )
{
std::unordered_map<uint32_t, SHAPE_POLY_SET> colorPolys =
ConvertImageToPolygons( img, pixelScale );
for( auto& [color, polySet] : colorPolys )
{
polySet.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
for( const SHAPE_POLY_SET::POLYGON& poly : polySet.CPolygons() )
{
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auto shape = std::make_unique<SCH_SHAPE>( SHAPE_T::POLY, LAYER_DEVICE );
shape->SetPolyShape( poly );
int r = color & 0xFF;
int g = ( color >> 8 ) & 0xFF;
int b = ( color >> 16 ) & 0xFF;
int a = ( color >> 24 ) & 0xFF;
shape->SetWidth( -1 );
shape->SetFillMode( FILL_T::FILLED_WITH_COLOR );
shape->SetFillColor( COLOR4D( r / 255.0, g / 255.0, b / 255.0, a / 255.0 ) );
shape->SetUnit( unit );
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shape->Move( offset );
aSymbol->AddDrawItem( shape.release() );
}
}
}
void ConvertSVGToLibShapes( LIB_SYMBOL* aSymbol, int unit, const wxMemoryBuffer& aImageData,
VECTOR2D pixelScale, VECTOR2D offset )
{
SVG_IMPORT_PLUGIN svgImportPlugin;
GRAPHICS_IMPORTER_LIB_SYMBOL libeditImporter( aSymbol, unit );
libeditImporter.SetScale( pixelScale );
libeditImporter.SetImportOffsetMM(
VECTOR2D( schIUScale.IUTomm( offset.x ), schIUScale.IUTomm( offset.y ) ) );
svgImportPlugin.SetImporter( &libeditImporter );
svgImportPlugin.LoadFromMemory( aImageData );
svgImportPlugin.Import();
}