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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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/>.
*
*/
//=============================================================================
//
// Base implementation of IGfxDriverFactory
//
// GfxDriverFactoryBase is a template implementation of basic driver factory
// functionality, such as creating and destruction of graphics driver, and
// managing graphic filters.
//
//=============================================================================
#ifndef AGS_ENGINE_GFX_GFX_DRIVER_FACTORY_BASE_H
#define AGS_ENGINE_GFX_GFX_DRIVER_FACTORY_BASE_H
#include "common/std/vector.h"
#include "ags/engine/gfx/gfx_driver_factory.h"
#include "ags/engine/gfx/gfxfilter.h"
namespace AGS3 {
namespace AGS {
namespace Engine {
template <class TGfxDriverClass, class TGfxFilterClass>
class GfxDriverFactoryBase : public IGfxDriverFactory {
protected:
~GfxDriverFactoryBase() override {
delete _driver;
}
public:
void Shutdown() override {
delete this;
}
IGraphicsDriver *GetDriver() override {
if (!_driver)
_driver = EnsureDriverCreated();
return _driver;
}
void DestroyDriver() override {
delete _driver;
_driver = nullptr;
}
PGfxFilter SetFilter(const String &id, String &filter_error) override {
TGfxDriverClass *driver = EnsureDriverCreated();
if (!driver) {
filter_error = "Graphics driver was not created";
return PGfxFilter();
}
const int color_depth = driver->GetDisplayMode().ColorDepth;
if (color_depth == 0) {
filter_error = "Graphics mode is not set";
return PGfxFilter();
}
std::shared_ptr<TGfxFilterClass> filter(CreateFilter(id));
if (!filter) {
filter_error = "Filter does not exist";
return PGfxFilter();
}
if (!filter->Initialize(color_depth, filter_error)) {
return PGfxFilter();
}
driver->SetGraphicsFilter(filter);
return filter;
}
protected:
GfxDriverFactoryBase()
: _driver(nullptr) {
}
virtual TGfxDriverClass *EnsureDriverCreated() = 0;
virtual TGfxFilterClass *CreateFilter(const String &id) = 0;
TGfxDriverClass *_driver;
};
} // namespace Engine
} // namespace AGS
} // namespace AGS3
#endif
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