mirror of https://github.com/mosra/magnum.git
Vladimír Vondruš
12 years ago
7 changed files with 375 additions and 6 deletions
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/*
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014 |
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Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#include "WindowlessWglApplication.h" |
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#include <windows.h> |
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#include <Corrade/Utility/Assert.h> |
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#include <Corrade/Utility/Debug.h> |
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#include "Magnum/Context.h" |
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namespace Magnum { namespace Platform { |
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/** @todo Delegating constructor when support for GCC 4.6 is dropped */ |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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int WindowlessWglApplication::create(LRESULT(CALLBACK windowProcedure)(HWND, UINT, WPARAM, LPARAM)) { |
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const WNDCLASS wc{ |
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0, |
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windowProcedure, |
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0, |
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0, |
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GetModuleHandle(nullptr), |
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nullptr, |
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nullptr, |
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HBRUSH(COLOR_BACKGROUND), |
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nullptr, |
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L"Magnum Windowless Application" |
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}; |
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if(!RegisterClass(&wc)) return 1; |
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CreateWindowW(wc.lpszClassName, L"Magnum Windowless Application", |
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WS_OVERLAPPEDWINDOW, 0, 0, 32, 32, 0, 0, wc.hInstance, 0); |
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return 0; |
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} |
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#endif |
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WindowlessWglApplication::WindowlessWglApplication(const Arguments& arguments, const Configuration& configuration): _window(arguments.window), _c(nullptr) { |
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createContext(configuration); |
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} |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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WindowlessWglApplication::WindowlessWglApplication(const Arguments& arguments): _window(arguments.window), _c(nullptr) { |
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createContext(); |
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} |
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#endif |
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WindowlessWglApplication::WindowlessWglApplication(const Arguments& arguments, std::nullptr_t): _window(arguments.window), _c(nullptr) {} |
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void WindowlessWglApplication::createContext() { createContext({}); } |
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void WindowlessWglApplication::createContext(const Configuration& configuration) { |
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if(!tryCreateContext(configuration)) std::exit(1); |
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} |
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bool WindowlessWglApplication::tryCreateContext(const Configuration&) { |
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CORRADE_ASSERT(!_c, "Platform::WindowlessWglApplication::tryCreateContext(): context already created", false); |
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/* Get device context */ |
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_deviceContext = GetDC(_window); |
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/* Use first provided pixel format */ |
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constexpr static const PIXELFORMATDESCRIPTOR pfd = { |
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sizeof(PIXELFORMATDESCRIPTOR), |
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1, |
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/* Double-buffered with OpenGL support */ |
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PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER, |
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PFD_TYPE_RGBA, /* RGBA */ |
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32, /* 32 bit */ |
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0, 0, 0, 0, 0, 0, |
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0, |
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0, |
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0, |
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0, 0, 0, 0, |
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24, /* 24-bit depth buffer */ |
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8, /* 8-bit stencil buffer */ |
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0, |
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PFD_MAIN_PLANE, |
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0, |
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0, 0, 0 |
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}; |
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const int pixelFormat = ChoosePixelFormat(_deviceContext, &pfd); |
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SetPixelFormat(_deviceContext, pixelFormat, &pfd); |
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/* Create context and make it current */ |
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_renderingContext = wglCreateContext(_deviceContext); |
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if(!_renderingContext) { |
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Error() << "Platform::WindowlessWglApplication::tryCreateContext(): cannot create context:" << GetLastError(); |
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return false; |
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} |
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/* Set OpenGL context as current */ |
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if(!wglMakeCurrent(_deviceContext, _renderingContext)) { |
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Error() << "Platform::WindowlessWglApplication::tryCreateContext(): cannot make context current:" << GetLastError(); |
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return false; |
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} |
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_c = new Context; |
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return true; |
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} |
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WindowlessWglApplication::~WindowlessWglApplication() { |
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delete _c; |
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wglMakeCurrent(_deviceContext, nullptr); |
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wglDeleteContext(_renderingContext); |
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} |
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}} |
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#ifndef Magnum_Platform_WindowlessWglApplication_h |
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#define Magnum_Platform_WindowlessWglApplication_h |
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/*
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014 |
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Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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|
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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/** @file
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* @brief Class @ref Magnum::Platform::WindowlessWglApplication |
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*/ |
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#include "Magnum/OpenGL.h" |
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#include "Magnum/Magnum.h" |
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namespace Magnum { namespace Platform { |
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/**
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@brief Windowless WGL application |
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Application for offscreen rendering using pure WINAPI. |
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This application library is available on desktop OpenGL on Windows. It is built |
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if `WITH_WINDOWLESSWGLAPPLICATION` is enabled in CMake. |
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## Bootstrap application |
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Fully contained windowless application using @ref WindowlessWglApplication |
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along with CMake setup is available in `windowless` branch of |
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[Magnum Bootstrap](https://github.com/mosra/magnum-bootstrap) repository,
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download it as [tar.gz](https://github.com/mosra/magnum-bootstrap/archive/windowless.tar.gz)
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or [zip](https://github.com/mosra/magnum-bootstrap/archive/windowless.zip)
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file. After extracting the downloaded archive you can build and run the |
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application with these four commands: |
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mkdir build && cd build |
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cmake .. |
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cmake --build . |
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./src/MyApplication # or ./src/Debug/MyApplication |
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## General usage |
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In CMake you need to request `%WindowlessWglApplication` component, add |
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`${MAGNUM_WINDOWLESSWGLAPPLICATION_INCLUDE_DIRS}` to include path and link to |
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`${MAGNUM_WINDOWLESSWGLAPPLICATION_LIBRARIES}`. If no other windowless |
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application is requested, you can also use generic |
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`${MAGNUM_WINDOWLESSAPPLICATION_INCLUDE_DIRS}` and |
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`${MAGNUM_WINDOWLESSAPPLICATION_LIBRARIES}` aliases to simplify porting. See |
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@ref building and @ref cmake for more information. |
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Place your code into @ref exec(). The subclass can be then used in main |
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function using @ref MAGNUM_WINDOWLESSWGLAPPLICATION_MAIN() macro. See |
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@ref platform for more information. |
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@code |
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class MyApplication: public Platform::WindowlessWglApplication { |
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// implement required methods...
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}; |
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MAGNUM_WINDOWLESSWGLAPPLICATION_MAIN(MyApplication) |
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@endcode |
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If no other application header is included, this class is also aliased to |
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`Platform::WindowlessApplication` and the macro is aliased to |
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`MAGNUM_WINDOWLESSAPPLICATION_MAIN()` to simplify porting. |
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*/ |
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class WindowlessWglApplication { |
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public: |
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/** @brief Application arguments */ |
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struct Arguments { |
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int& argc; /**< @brief Argument count */ |
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char** argv; /**< @brief Argument values */ |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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HWND window; |
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#endif |
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}; |
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class Configuration; |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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static int create(LRESULT(CALLBACK windowProcedure)(HWND, UINT, WPARAM, LPARAM)); |
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#endif |
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/** @copydoc Sdl2Application::Sdl2Application(const Arguments&, const Configuration&) */ |
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#ifdef DOXYGEN_GENERATING_OUTPUT |
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explicit WindowlessWglApplication(const Arguments& arguments, const Configuration& configuration = Configuration()); |
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#else |
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/* To avoid "invalid use of incomplete type" */ |
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explicit WindowlessWglApplication(const Arguments& arguments, const Configuration& configuration); |
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explicit WindowlessWglApplication(const Arguments& arguments); |
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#endif |
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/** @copydoc Sdl2Application::Sdl2Application(const Arguments&, std::nullptr_t) */ |
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explicit WindowlessWglApplication(const Arguments& arguments, std::nullptr_t); |
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/** @brief Copying is not allowed */ |
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WindowlessWglApplication(const WindowlessWglApplication&) = delete; |
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/** @brief Moving is not allowed */ |
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WindowlessWglApplication(WindowlessWglApplication&&) = delete; |
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/** @brief Copying is not allowed */ |
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WindowlessWglApplication& operator=(const WindowlessWglApplication&) = delete; |
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/** @brief Moving is not allowed */ |
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WindowlessWglApplication& operator=(WindowlessWglApplication&&) = delete; |
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/**
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* @brief Execute application |
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* @return Value for returning from `main()` |
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* |
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* See @ref MAGNUM_WINDOWLESSWGLAPPLICATION_MAIN() for usage |
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* information. |
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*/ |
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virtual int exec() = 0; |
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protected: |
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/* Nobody will need to have (and delete) WindowlessWglApplication*,
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thus this is faster than public pure virtual destructor */ |
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~WindowlessWglApplication(); |
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/** @copydoc Sdl2Application::createContext() */ |
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#ifdef DOXYGEN_GENERATING_OUTPUT |
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void createContext(const Configuration& configuration = Configuration()); |
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#else |
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/* To avoid "invalid use of incomplete type" */ |
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void createContext(const Configuration& configuration); |
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void createContext(); |
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#endif |
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/** @copydoc Sdl2Application::tryCreateContext() */ |
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bool tryCreateContext(const Configuration& configuration); |
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private: |
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HWND _window; |
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HDC _deviceContext; |
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HGLRC _renderingContext; |
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Context* _c; |
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}; |
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/**
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@brief %Configuration |
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@see @ref WindowlessWglApplication(), @ref createContext(), |
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@ref tryCreateContext() |
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*/ |
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class WindowlessWglApplication::Configuration { |
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public: |
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constexpr /*implicit*/ Configuration() {} |
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}; |
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/** @hideinitializer
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@brief Entry point for windowless WGL application |
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@param className Class name |
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See @ref Magnum::Platform::WindowlessWglApplication "Platform::WindowlessWglApplication" |
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for usage information. This macro abstracts out platform-specific entry point |
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code, see @ref portability-applications for more information. When no other |
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windowless application header is included this macro is also aliased to |
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`MAGNUM_WINDOWLESSAPPLICATION_MAIN()`. |
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*/ |
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#define MAGNUM_WINDOWLESSWGLAPPLICATION_MAIN(className) \ |
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int globalArgc; char** globalArgv; \
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LRESULT CALLBACK windowProcedure(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam); \
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LRESULT CALLBACK windowProcedure(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { \
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switch(message) { \
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case WM_CREATE: \
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{ \
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className app({globalArgc, globalArgv, hWnd}); \
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app.exec(); \
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} \
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PostQuitMessage(0); \
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break; \
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default: return DefWindowProc(hWnd, message, wParam, lParam); \
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} \
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return 0; \
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} \
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int main(int argc, char** argv) { \
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globalArgc = argc; \
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globalArgv = argv; \
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return Magnum::Platform::WindowlessWglApplication::create(windowProcedure); \
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} |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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#ifndef MAGNUM_WINDOWLESSAPPLICATION_MAIN |
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typedef WindowlessWglApplication WindowlessApplication; |
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#define MAGNUM_WINDOWLESSAPPLICATION_MAIN(className) MAGNUM_WINDOWLESSWGLAPPLICATION_MAIN(className) |
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#else |
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#undef MAGNUM_WINDOWLESSAPPLICATION_MAIN |
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#endif |
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#endif |
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}} |
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#endif |
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