framework/platform/win32/tcuWGLContextFactory.cpp

   1 /*-------------------------------------------------------------------------
   2  * drawElements Quality Program Tester Core
   3  * ----------------------------------------
   4  *
   5  * Copyright 2014 The Android Open Source Project
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  *//*!
  20  * \file
  21  * \brief WGL GL context factory.
  22  *//*--------------------------------------------------------------------*/
  23
  24 #include "tcuWGLContextFactory.hpp"
  25
  26 #include "gluRenderConfig.hpp"
  27 #include "tcuRenderTarget.hpp"
  28 #include "tcuWin32Window.hpp"
  29 #include "glwFunctions.hpp"
  30 #include "glwInitFunctions.hpp"
  31 #include "deString.h"
  32
  33 using std::vector;
  34
  35 namespace tcu
  36 {
  37 namespace wgl
  38 {
  39 namespace
  40 {
  41
  42 enum
  43 {
  44         DEFAULT_WINDOW_WIDTH    = 400,
  45         DEFAULT_WINDOW_HEIGHT   = 300
  46 };
  47
  48 class WGLFunctionLoader : public glw::FunctionLoader
  49 {
  50 public:
  51         WGLFunctionLoader (const wgl::Context& context)
  52                 : m_context(context)
  53         {
  54         }
  55
  56         glw::GenericFuncType get (const char* name) const
  57         {
  58                 return (glw::GenericFuncType)m_context.getGLFunction(name);
  59         }
  60
  61 private:
  62         const wgl::Context& m_context;
  63 };
  64
  65 class WGLContext : public glu::RenderContext
  66 {
  67 public:
  68                                                                         WGLContext                      (HINSTANCE instance, const wgl::Core& wglCore, const WGLContext* sharedContext, const glu::RenderConfig& config);
  69                                                                         ~WGLContext                     (void);
  70
  71         glu::ContextType                                getType                         (void) const    { return m_contextType;                 }
  72         const RenderTarget&                             getRenderTarget         (void) const    { return m_renderTarget;                }
  73         void                                                    postIterate                     (void);
  74         const glw::Functions&                   getFunctions            (void) const    { return m_functions;                   }
  75
  76         glw::GenericFuncType                    getProcAddress          (const char* name) const;
  77
  78         void                                                    makeCurrent                     (void);
  79
  80 private:
  81                                                                         WGLContext                      (const WGLContext& other);
  82         WGLContext&                                             operator=                       (const WGLContext& other);
  83
  84         glu::ContextType                                m_contextType;
  85
  86         win32::Window                                   m_window;
  87         wgl::Context*                                   m_context;
  88
  89         tcu::RenderTarget                               m_renderTarget;
  90         glw::Functions                                  m_functions;
  91 };
  92
  93 WGLContext::WGLContext (HINSTANCE instance, const wgl::Core& wglCore, const WGLContext* sharedContext, const glu::RenderConfig& config)
  94         : m_contextType (config.type)
  95         , m_window              (instance,
  96                                          config.width   != glu::RenderConfig::DONT_CARE ? config.width  : DEFAULT_WINDOW_WIDTH,
  97                                          config.height  != glu::RenderConfig::DONT_CARE ? config.height : DEFAULT_WINDOW_HEIGHT)
  98         , m_context             (DE_NULL)
  99 {
 100         if (config.surfaceType != glu::RenderConfig::SURFACETYPE_WINDOW &&
 101                 config.surfaceType != glu::RenderConfig::SURFACETYPE_DONT_CARE)
 102                 throw NotSupportedError("Unsupported surface type");
 103
 104         HDC             deviceCtx       = m_window.getDeviceContext();
 105         int             pixelFormat     = 0;
 106
 107         if (config.id != glu::RenderConfig::DONT_CARE)
 108                 pixelFormat = config.id;
 109         else
 110                 pixelFormat = wgl::choosePixelFormat(wglCore, deviceCtx, config);
 111
 112         if (pixelFormat < 0)
 113                 throw NotSupportedError("Compatible WGL pixel format not found");
 114
 115         const wgl::Context* sharedCtx = DE_NULL;
 116         if (DE_NULL != sharedContext)
 117                 sharedCtx = sharedContext->m_context;
 118
 119         m_context = new wgl::Context(&wglCore, deviceCtx, sharedCtx, config.type, pixelFormat, config.resetNotificationStrategy);
 120
 121         try
 122         {
 123                 // Describe selected config & get render target props.
 124                 const wgl::PixelFormatInfo      info    = wglCore.getPixelFormatInfo(deviceCtx, pixelFormat);
 125                 const IVec2                                     size    = m_window.getSize();
 126
 127                 m_renderTarget = tcu::RenderTarget(size.x(), size.y(),
 128                                                                                    tcu::PixelFormat(info.redBits, info.greenBits, info.blueBits, info.alphaBits),
 129                                                                                    info.depthBits, info.stencilBits,
 130                                                                                    info.sampleBuffers ? info.samples : 0);
 131
 132                 // Load functions
 133                 {
 134                         WGLFunctionLoader funcLoader(*m_context);
 135                         glu::initFunctions(&m_functions, &funcLoader, config.type.getAPI());
 136                 }
 137
 138                 if (config.windowVisibility != glu::RenderConfig::VISIBILITY_VISIBLE &&
 139                         config.windowVisibility != glu::RenderConfig::VISIBILITY_HIDDEN)
 140                         throw NotSupportedError("Unsupported window visibility mode");
 141
 142                 m_window.setVisible(config.windowVisibility != glu::RenderConfig::VISIBILITY_HIDDEN);
 143         }
 144         catch (...)
 145         {
 146                 delete m_context;
 147                 throw;
 148         }
 149 }
 150
 151 WGLContext::~WGLContext (void)
 152 {
 153         delete m_context;
 154 }
 155
 156 glw::GenericFuncType WGLContext::getProcAddress (const char* name) const
 157 {
 158         return m_context->getGLFunction(name);
 159 }
 160
 161 void WGLContext::makeCurrent (void)
 162 {
 163         m_context->makeCurrent();
 164 }
 165
 166 void WGLContext::postIterate (void)
 167 {
 168         m_context->swapBuffers();
 169         m_window.processEvents();
 170 }
 171
 172 } // anonymous
 173
 174 ContextFactory::ContextFactory (HINSTANCE instance)
 175         : glu::ContextFactory   ("wgl", "Windows WGL OpenGL context")
 176         , m_instance                    (instance)
 177         , m_wglCore                             (instance)
 178 {
 179 }
 180
 181 glu::RenderContext* ContextFactory::createContext (const glu::RenderConfig&  config, const tcu::CommandLine&,
 182                                                                                                    const glu::RenderContext* sharedContext) const
 183 {
 184         const WGLContext* sharedWGLContext = static_cast<const WGLContext*>(sharedContext);
 185         return new WGLContext(m_instance, m_wglCore, sharedWGLContext, config);
 186 }
 187
 188 } // wgl
 189 } // tcu