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///////////////////////////////////////////////////////////////////////////////
// Name: tests/drawing/gcfactory.h
// Purpose: Interface of a factory to create and destroy a wxGraphicsContext
// and finally save the result of a rendering test
// Author: Armel Asselin
// Created: 2014-02-26
// Copyright: (c) 2014 Ellié Computing <opensource@elliecomputing.com>
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_TESTS_GCFACTORY_H_
#define _WX_TESTS_GCFACTORY_H_
// wxCairoRenderer::CreateMeasuringContext() is not implement for wxX11
#if wxUSE_GRAPHICS_CONTEXT && !defined(__WXX11__)
#include "wx/graphics.h"
#define wxUSE_TEST_GC_DRAWING 1
#else
#define wxUSE_TEST_GC_DRAWING 0
#endif
#if wxUSE_TEST_GC_DRAWING
#include "wx/filename.h"
class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
// Implement a class derived from this one to let the drawing test create
// graphics context, save them and destroy them.
class DrawingTestGCFactory
{
public:
virtual ~DrawingTestGCFactory() {}
// This identifier is used in the test and reference files to distinguish
// results produced by wxGraphicsContext generated by this factory
// use only lower case latin letters, '_' and '-'
virtual wxString GetIdForFileName () const = 0;
// This is the extension used when saving test and reference files
virtual wxString GetExtensionForFileName () const = 0;
// Returns true if a pixel per pixel comparison of rendered image should
// be used rather than a byte by byte comparison of files
virtual bool UseImageComparison() const = 0;
// Returns true this target is platform independent, rendering exactly
// the same result for whichever platform
virtual bool PlatformIndependent() const = 0;
// Builds a new context of @c expected_size, expecting to save it as
// @c target_file_name
// NB: only one context is created as a time, so that the implementer
// can keep internal state if necessary
virtual wxGraphicsContext *BuildNewContext (wxSize expectedSize,
double pointsPerInch, const wxFileName &targetFileName) = 0;
// Let's the opportunity to actually save the context and associated data
// If saving requires deleting the wxGraphicsContext object the
// implementer is free to do it but @c gc must then be nulled
virtual void SaveBuiltContext (wxGraphicsContext *&gc) = 0;
// Cleans @c gc and internal data if any
virtual void CleanUp (wxGraphicsContext *gc) = 0;
};
typedef DrawingTestGCFactory * (*CreateDrawingTestLifeCycleFunction)();
typedef void (*DestroyDrawingTestLifeCycleFunction) (DrawingTestGCFactory* lc);
#endif // wxUSE_TEST_GC_DRAWING
#endif // #ifndef _WX_TESTS_GCFACTORY_H_
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