kicad/common/gal/cairo/cairo_print.cpp

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/*
* Copyright (C) 2019 CERN
* Author: Maciej Suminski <maciej.suminski@cern.ch>
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* 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 <gal/cairo/cairo_print.h>
#include <stdexcept>
#include <wx/dcclient.h>
#include <wx/dcgraph.h>
#include <wx/dcmemory.h>
#include <wx/dcprint.h>
#ifdef NOMINMAX /* workaround for gdiplus.h */
#include <algorithm>
using std::min;
using std::max;
#endif
#ifdef __WXMSW__
#include <windows.h>
#include <gdiplus.h>
#include <cairo-win32.h>
#include <wx/msw/enhmeta.h>
#endif /* __WXMSW__ */
#ifdef __WXMAC__
#include <ApplicationServices/ApplicationServices.h>
#include <cairo-quartz.h>
#endif /* __WXMAC__ */
using namespace KIGFX;
CAIRO_PRINT_CTX::CAIRO_PRINT_CTX( wxDC* aDC )
: m_gcdc( nullptr ), m_ctx( nullptr ), m_surface( nullptr )
{
if( wxPrinterDC* printerDC = dynamic_cast<wxPrinterDC*>( aDC ) )
m_gcdc = new wxGCDC( *printerDC );
else if( wxMemoryDC* memoryDC = dynamic_cast<wxMemoryDC*>( aDC ) )
m_gcdc = new wxGCDC( *memoryDC );
else if( wxWindowDC* windowDC = dynamic_cast<wxWindowDC*>( aDC ) )
m_gcdc = new wxGCDC( *windowDC );
#ifdef __WXMSW__
else if( wxEnhMetaFileDC* enhMFDC = dynamic_cast<wxEnhMetaFileDC*>( aDC ) )
m_gcdc = new wxGCDC( *enhMFDC );
#endif /* __WXMSW__ */
else
throw std::runtime_error( "Unhandled wxDC type" );
wxGraphicsContext* gctx = m_gcdc->GetGraphicsContext();
if( !gctx )
throw std::runtime_error( "Could not get the Graphics Context" );
#ifdef __WXGTK__
m_ctx = static_cast<cairo_t*>( gctx->GetNativeContext() );
m_surface = cairo_get_target( m_ctx );
// On linux, cairo printers have 72 DPI by default.
// This is an unusable resolution for us.
// A better resolution could be 4800 DPI (at 600 DPI, we still have minor
// but visible artifacts, for instance with arcs, but not at 4800 DPI)
// so modify the default:
#define DEFAULT_DPI 72.0
#define KICAD_PRINTER_DPI 4800.0
// our device scale is DEFAULT_DPI / KICAD_PRINTER_DPI
cairo_surface_set_device_scale( m_surface, DEFAULT_DPI/KICAD_PRINTER_DPI, DEFAULT_DPI/KICAD_PRINTER_DPI );
m_dpi = KICAD_PRINTER_DPI;
#endif /* __WXGTK__ */
#ifdef __WXMSW__
Gdiplus::Graphics* g = static_cast<Gdiplus::Graphics*>( gctx->GetNativeContext() );
m_hdc = g->GetHDC();
m_surface = cairo_win32_printing_surface_create( static_cast<HDC>( m_hdc ) );
m_ctx = cairo_create( m_surface );
m_dpi = GetDeviceCaps( static_cast<HDC>( m_hdc ), LOGPIXELSX );
#endif /* __WXMSW__ */
#ifdef __WXMAC__
wxSize size = m_gcdc->GetSize();
CGContextRef cg = (CGContextRef) gctx->GetNativeContext();
m_surface = cairo_quartz_surface_create_for_cg_context( cg, size.x, size.y );
m_ctx = cairo_create( m_surface );
wxASSERT( aDC->GetPPI().x == aDC->GetPPI().y );
m_dpi = aDC->GetPPI().x;
#endif /* __WXMAC__ */
if( !m_ctx || cairo_status( m_ctx ) != CAIRO_STATUS_SUCCESS )
throw std::runtime_error( "Could not create Cairo context" );
if( !m_surface || cairo_surface_status( m_surface ) != CAIRO_STATUS_SUCCESS )
throw std::runtime_error( "Could not create Cairo surface" );
cairo_reference( m_ctx );
cairo_surface_reference( m_surface );
}
CAIRO_PRINT_CTX::~CAIRO_PRINT_CTX()
{
#ifdef __WXMSW__
cairo_surface_show_page( m_surface );
wxGraphicsContext* gctx = m_gcdc->GetGraphicsContext();
Gdiplus::Graphics* g = static_cast<Gdiplus::Graphics*>( gctx->GetNativeContext() );
g->ReleaseHDC( static_cast<HDC>( m_hdc ) );
#endif /* __WXMSW__ */
cairo_surface_destroy( m_surface );
cairo_destroy( m_ctx );
delete m_gcdc;
}
CAIRO_PRINT_GAL::CAIRO_PRINT_GAL( GAL_DISPLAY_OPTIONS& aDisplayOptions,
std::unique_ptr<CAIRO_PRINT_CTX> aContext )
: CAIRO_GAL_BASE( aDisplayOptions )
{
m_printCtx = std::move( aContext );
context = currentContext = m_printCtx->GetContext();
surface = m_printCtx->GetSurface();
cairo_reference( context );
cairo_surface_reference( surface );
m_clearColor = COLOR4D( 1.0, 1.0, 1.0, 1.0 );
m_hasNativeLandscapeRotation = false;
resetContext();
SetScreenDPI( m_printCtx->GetNativeDPI() );
}
void CAIRO_PRINT_GAL::ComputeWorldScreenMatrix()
{
worldScale = screenDPI * worldUnitLength * zoomFactor;
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const auto paperSizeIU = VECTOR2D( m_nativePaperSize.y, m_nativePaperSize.x ) /* inches */ / worldUnitLength; /* 1 inch in IU */
const auto paperSizeIUTransposed = VECTOR2D( paperSizeIU.y, paperSizeIU.x );
MATRIX3x3D scale, translation, flip, rotate, lookat;
scale.SetIdentity();
translation.SetIdentity();
flip.SetIdentity();
rotate.SetIdentity();
lookat.SetIdentity();
if( m_hasNativeLandscapeRotation )
{
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translation.SetTranslation( 0.5 / zoomFactor * paperSizeIUTransposed );
}
else
{
if( isLandscape() )
{
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translation.SetTranslation( 0.5 / zoomFactor * paperSizeIU );
rotate.SetRotation( 90.0 * M_PI / 180.0 );
}
else
{
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translation.SetTranslation( 0.5 / zoomFactor * paperSizeIUTransposed );
}
}
scale.SetScale( VECTOR2D( worldScale, worldScale ) );
flip.SetScale( VECTOR2D( globalFlipX ? -1.0 : 1.0, globalFlipY ? -1.0 : 1.0 ) );
lookat.SetTranslation( -lookAtPoint );
worldScreenMatrix = scale * translation * flip * rotate * lookat;
screenWorldMatrix = worldScreenMatrix.Inverse();
}
void CAIRO_PRINT_GAL::SetNativePaperSize( const VECTOR2D& aSize, bool aHasNativeLandscapeRotation )
{
m_nativePaperSize = aSize;
m_hasNativeLandscapeRotation = aHasNativeLandscapeRotation;
}
void CAIRO_PRINT_GAL::SetSheetSize( const VECTOR2D& aSize )
{
// Convert aSize (inches) to pixels
SetScreenSize( VECTOR2I( std::ceil( aSize.x * screenDPI ) * 2,
std::ceil( aSize.y * screenDPI ) * 2 ) );
}
std::unique_ptr<GAL_PRINT> GAL_PRINT::Create( GAL_DISPLAY_OPTIONS& aOptions, wxDC* aDC )
{
auto printCtx = std::make_unique<CAIRO_PRINT_CTX>( aDC );
return std::make_unique<CAIRO_PRINT_GAL>( aOptions, std::move( printCtx ) );
}