mirror of https://github.com/mosra/magnum.git
Vladimír Vondruš
11 years ago
9 changed files with 469 additions and 24 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, 2015 |
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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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|
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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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#include "WindowlessWindowsEglApplication.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/Platform/Context.h" |
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#include "Implementation/Egl.h" |
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namespace Magnum { namespace Platform { |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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int WindowlessWindowsEglApplication::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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/* Hammer the return code out of the messaging thingy */ |
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MSG msg; |
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do {} while(GetMessageW(&msg, nullptr, 0, 0) != 0); |
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return msg.wParam; |
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} |
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#endif |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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WindowlessWindowsEglApplication::WindowlessWindowsEglApplication(const Arguments& arguments): WindowlessWindowsEglApplication{arguments, Configuration{}} {} |
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#endif |
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WindowlessWindowsEglApplication::WindowlessWindowsEglApplication(const Arguments& arguments, const Configuration& configuration): WindowlessWindowsEglApplication{arguments, nullptr} { |
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createContext(configuration); |
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} |
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WindowlessWindowsEglApplication::WindowlessWindowsEglApplication(const Arguments& arguments, std::nullptr_t): _window(arguments.window) {} |
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void WindowlessWindowsEglApplication::createContext() { createContext({}); } |
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void WindowlessWindowsEglApplication::createContext(const Configuration& configuration) { |
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if(!tryCreateContext(configuration)) std::exit(1); |
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} |
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bool WindowlessWindowsEglApplication::tryCreateContext(const Configuration&) { |
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CORRADE_ASSERT(!_context, "Platform::WindowlessWindowsEglApplication::tryCreateContext(): context already created", false); |
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/* Initialize */ |
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_display = eglGetDisplay(GetDC(_window)); |
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if(!eglInitialize(_display, nullptr, nullptr)) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): cannot initialize EGL:" << Implementation::eglErrorString(eglGetError()); |
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return false; |
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} |
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const EGLenum api = |
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#ifndef MAGNUM_TARGET_GLES |
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EGL_OPENGL_API |
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#else |
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EGL_OPENGL_ES_API |
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#endif |
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; |
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if(!eglBindAPI(api)) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): cannot bind EGL API:" << Implementation::eglErrorString(eglGetError()); |
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return false; |
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} |
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|
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/* Choose EGL config */ |
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static const EGLint attribs[] = { |
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EGL_RED_SIZE, 1, |
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EGL_GREEN_SIZE, 1, |
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EGL_BLUE_SIZE, 1, |
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EGL_DEPTH_SIZE, 1, |
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#ifndef MAGNUM_TARGET_GLES |
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, |
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#elif defined(MAGNUM_TARGET_GLES3) |
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT, |
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#elif defined(MAGNUM_TARGET_GLES2) |
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, |
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#else |
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#error unsupported OpenGL edition |
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#endif |
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EGL_NONE |
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}; |
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EGLint configCount; |
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if(!eglChooseConfig(_display, attribs, &_config, 1, &configCount)) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): cannot get EGL visual config:" << Implementation::eglErrorString(eglGetError()); |
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return false; |
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} |
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if(!configCount) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): no matching EGL visual config available"; |
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return false; |
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} |
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static const EGLint attributes[] = { |
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#ifdef MAGNUM_TARGET_GLES |
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EGL_CONTEXT_CLIENT_VERSION, |
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#ifdef MAGNUM_TARGET_GLES3 |
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3, |
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#elif defined(MAGNUM_TARGET_GLES2) |
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2, |
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#else |
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#error unsupported OpenGL ES version |
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#endif |
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#endif |
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EGL_NONE |
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}; |
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if(!(_glContext = eglCreateContext(_display, _config, EGL_NO_CONTEXT, attributes))) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): cannot create EGL context:" << Implementation::eglErrorString(eglGetError()); |
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return false; |
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} |
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if(!(_surface = eglCreateWindowSurface(_display, _config, _window, nullptr))) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): cannot create window surface:" << Implementation::eglErrorString(eglGetError()); |
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return false; |
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} |
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if(!eglMakeCurrent(_display, _surface, _surface, _glContext)) { |
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Error() << "Platform::WindowlessWindowsEglApplication::tryCreateContext(): cannot make context current:" << Implementation::eglErrorString(eglGetError()); |
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return false; |
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} |
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_context.reset(new Platform::Context); |
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return true; |
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} |
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WindowlessWindowsEglApplication::~WindowlessWindowsEglApplication() { |
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_context.reset(); |
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eglDestroyContext(_display, _glContext); |
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eglDestroySurface(_display, _surface); |
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eglTerminate(_display); |
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} |
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}} |
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@ -0,0 +1,228 @@
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#ifndef Magnum_Platform_WindowlessWindowsEglApplication_h |
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#define Magnum_Platform_WindowlessWindowsEglApplication_h |
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/*
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This file is part of Magnum. |
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|
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015 |
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Vladimír Vondruš <mosra@centrum.cz> |
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|
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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"), |
||||
to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||||
and/or sell copies of the Software, and to permit persons to whom the |
||||
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 |
||||
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 |
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||||
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
||||
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
||||
DEALINGS IN THE SOFTWARE. |
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*/ |
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/** @file
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* @brief Class @ref Magnum::Platform::WindowlessWindowsEglApplication, macro @ref MAGNUM_WINDOWLESSWINDOWSEGLAPPLICATION_MAIN() |
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*/ |
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#include <memory> |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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#define WIN32_LEAN_AND_MEAN 1 |
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#define VC_EXTRALEAN |
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#endif |
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#include <windows.h> |
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#include <EGL/egl.h> |
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#include "Magnum/Magnum.h" |
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#include "Magnum/OpenGL.h" |
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#include "Magnum/Platform/Context.h" |
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namespace Magnum { namespace Platform { |
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/**
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@brief Windowless Windows/EGL application |
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Application for offscreen rendering using pure WINAPI and EGL. |
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This application library is available on OpenGL ES (also ANGLE) on Windows. It |
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is built if `WITH_WINDOWLESSWINDOWSEGLAPPLICATION` is enabled in CMake. |
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## Bootstrap application |
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Fully contained windowless application using @ref WindowlessWindowsEglApplication |
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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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See @ref cmake for more information. |
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## General usage |
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In CMake you need to request `WindowlessWindowsEglApplication` component, add |
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`${MAGNUM_WINDOWLESSWINDOWSEGLAPPLICATION_INCLUDE_DIRS}` to include path and |
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link to `${MAGNUM_WINDOWLESSWINDOWSEGLAPPLICATION_LIBRARIES}`. If no other |
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windowless 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. Again, |
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see @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_WINDOWLESSWINDOWSEGLAPPLICATION_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::WindowlessWindowsEglApplication { |
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// implement required methods...
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}; |
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MAGNUM_WINDOWLESSWINDOWSEGLAPPLICATION_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 WindowlessWindowsEglApplication { |
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public: |
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/** @brief Application arguments */ |
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struct Arguments { |
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/** @brief Constructor */ |
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/*implicit*/ constexpr Arguments(int& argc, char** argv, HWND window) noexcept: argc{argc}, argv{argv}, window{window} {} |
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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 WindowlessWindowsEglApplication(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 WindowlessWindowsEglApplication(const Arguments& arguments, const Configuration& configuration); |
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explicit WindowlessWindowsEglApplication(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 WindowlessWindowsEglApplication(const Arguments& arguments, std::nullptr_t); |
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/** @brief Copying is not allowed */ |
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WindowlessWindowsEglApplication(const WindowlessWindowsEglApplication&) = delete; |
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/** @brief Moving is not allowed */ |
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WindowlessWindowsEglApplication(WindowlessWindowsEglApplication&&) = delete; |
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/** @brief Copying is not allowed */ |
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WindowlessWindowsEglApplication& operator=(const WindowlessWindowsEglApplication&) = delete; |
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/** @brief Moving is not allowed */ |
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WindowlessWindowsEglApplication& operator=(WindowlessWindowsEglApplication&&) = 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_WINDOWLESSWINDOWSEGLAPPLICATION_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) WindowlessWindowsEglApplication*,
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thus this is faster than public pure virtual destructor */ |
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~WindowlessWindowsEglApplication(); |
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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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EGLDisplay _display; |
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EGLConfig _config; |
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EGLSurface _surface; |
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EGLContext _glContext; |
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std::unique_ptr<Platform::Context> _context; |
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}; |
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/**
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@brief Configuration |
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@see @ref WindowlessWindowsEglApplication(), @ref createContext(), |
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@ref tryCreateContext() |
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*/ |
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class WindowlessWindowsEglApplication::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::WindowlessWindowsEglApplication "Platform::WindowlessWindowsEglApplication" |
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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_WINDOWLESSWINDOWSEGLAPPLICATION_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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PostQuitMessage(app.exec()); \
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} \
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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::WindowlessWindowsEglApplication::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 WindowlessWindowsEglApplication WindowlessApplication; |
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#define MAGNUM_WINDOWLESSAPPLICATION_MAIN(className) MAGNUM_WINDOWLESSWINDOWSEGLAPPLICATION_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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