1 /* ScummVM - Graphic Adventure Engine 2 * 3 * ScummVM is the legal property of its developers, whose names 4 * are too numerous to list here. Please refer to the COPYRIGHT 5 * file distributed with this source distribution. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 //============================================================================= 24 // 25 // Base implementation of IGfxDriverFactory 26 // 27 // GfxDriverFactoryBase is a template implementation of basic driver factory 28 // functionality, such as creating and destruction of graphics driver, and 29 // managing graphic filters. 30 // 31 //============================================================================= 32 33 #ifndef AGS_ENGINE_GFX_GFX_DRIVER_FACTORY_BASE_H 34 #define AGS_ENGINE_GFX_GFX_DRIVER_FACTORY_BASE_H 35 36 #include "ags/lib/std/vector.h" 37 #include "ags/engine/gfx/gfx_driver_factory.h" 38 #include "ags/engine/gfx/gfxfilter.h" 39 40 namespace AGS3 { 41 namespace AGS { 42 namespace Engine { 43 44 template <class TGfxDriverClass, class TGfxFilterClass> 45 class GfxDriverFactoryBase : public IGfxDriverFactory { 46 protected: ~GfxDriverFactoryBase()47 ~GfxDriverFactoryBase() override { 48 delete _driver; 49 } 50 51 public: Shutdown()52 void Shutdown() override { 53 delete this; 54 } 55 GetDriver()56 IGraphicsDriver *GetDriver() override { 57 if (!_driver) 58 _driver = EnsureDriverCreated(); 59 return _driver; 60 } 61 DestroyDriver()62 void DestroyDriver() override { 63 delete _driver; 64 _driver = nullptr; 65 } 66 SetFilter(const String & id,String & filter_error)67 PGfxFilter SetFilter(const String &id, String &filter_error) override { 68 TGfxDriverClass *driver = EnsureDriverCreated(); 69 if (!driver) { 70 filter_error = "Graphics driver was not created"; 71 return PGfxFilter(); 72 } 73 74 const int color_depth = driver->GetDisplayMode().ColorDepth; 75 if (color_depth == 0) { 76 filter_error = "Graphics mode is not set"; 77 return PGfxFilter(); 78 } 79 80 std::shared_ptr<TGfxFilterClass> filter(CreateFilter(id)); 81 if (!filter) { 82 filter_error = "Filter does not exist"; 83 return PGfxFilter(); 84 } 85 86 if (!filter->Initialize(color_depth, filter_error)) { 87 return PGfxFilter(); 88 } 89 90 driver->SetGraphicsFilter(filter); 91 return filter; 92 } 93 94 protected: GfxDriverFactoryBase()95 GfxDriverFactoryBase() 96 : _driver(nullptr) { 97 } 98 99 virtual TGfxDriverClass *EnsureDriverCreated() = 0; 100 virtual TGfxFilterClass *CreateFilter(const String &id) = 0; 101 102 TGfxDriverClass *_driver; 103 }; 104 105 } // namespace Engine 106 } // namespace AGS 107 } // namespace AGS3 108 109 #endif 110