kc3-lang/angle/src/libANGLE/renderer/gl/wgl/WindowSurfaceWGL.cpp

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• Hash : 62baf0cf
  Author :
  Date : 2016-05-19T13:13:36
  

  Add a shared egl::SurfaceState struct.
  
  This structure can share GL-level properties (immutably) with the
  implementation.
  
  BUG=angleproject:1369
  
  Change-Id: I1e9406f18b6b88bb7db2a8f87b5e6d547cc7ecb1
  Reviewed-on: https://chromium-review.googlesource.com/342061
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/gl/wgl/WindowSurfaceWGL.cpp

• //
  // Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // WindowSurfaceWGL.cpp: WGL implementation of egl::Surface for windows
  
  #include "libANGLE/renderer/gl/wgl/WindowSurfaceWGL.h"
  
  #include "common/debug.h"
  #include "libANGLE/renderer/gl/RendererGL.h"
  #include "libANGLE/renderer/gl/wgl/FunctionsWGL.h"
  #include "libANGLE/renderer/gl/wgl/wgl_utils.h"
  
  namespace rx
  {
  
  WindowSurfaceWGL::WindowSurfaceWGL(const egl::SurfaceState &state,
                                     RendererGL *renderer,
                                     EGLNativeWindowType window,
                                     int pixelFormat,
                                     HGLRC wglContext,
                                     const FunctionsWGL *functions,
                                     EGLint orientation)
      : SurfaceGL(state, renderer),
        mPixelFormat(pixelFormat),
        mWGLContext(wglContext),
        mWindow(window),
        mDeviceContext(nullptr),
        mFunctionsWGL(functions),
        mSwapBehavior(0)
  {
      // EGL_ANGLE_surface_orientation is not supported for regular WGL window surfaces
      ASSERT(orientation == 0);
  }
  
  WindowSurfaceWGL::~WindowSurfaceWGL()
  {
      ReleaseDC(mWindow, mDeviceContext);
      mDeviceContext = nullptr;
  }
  
  egl::Error WindowSurfaceWGL::initialize()
  {
      mDeviceContext = GetDC(mWindow);
      if (!mDeviceContext)
      {
          return egl::Error(EGL_BAD_NATIVE_WINDOW, "Failed to get the device context from the native window, "
                                                   "error: 0x%X.", GetLastError());
      }
  
      // Require that the pixel format for this window has not been set yet or is equal to the Display's pixel format.
      int windowPixelFormat = GetPixelFormat(mDeviceContext);
      if (windowPixelFormat == 0)
      {
          PIXELFORMATDESCRIPTOR pixelFormatDescriptor = { 0 };
          if (!DescribePixelFormat(mDeviceContext, mPixelFormat, sizeof(pixelFormatDescriptor), &pixelFormatDescriptor))
          {
              return egl::Error(EGL_BAD_NATIVE_WINDOW, "Failed to DescribePixelFormat, error: 0x%X.", GetLastError());
          }
  
          if (!SetPixelFormat(mDeviceContext, mPixelFormat, &pixelFormatDescriptor))
          {
              return egl::Error(EGL_NOT_INITIALIZED, "Failed to set the pixel format on the device context, "
                                                     "error: 0x%X.", GetLastError());
          }
      }
      else if (windowPixelFormat != mPixelFormat)
      {
          return egl::Error(EGL_NOT_INITIALIZED, "Pixel format of the NativeWindow and NativeDisplayType must match.");
      }
  
      // Check for the swap behavior of this pixel format
      switch (
          wgl::QueryWGLFormatAttrib(mDeviceContext, mPixelFormat, WGL_SWAP_METHOD_ARB, mFunctionsWGL))
      {
          case WGL_SWAP_COPY_ARB:
              mSwapBehavior = EGL_BUFFER_PRESERVED;
              break;
  
          case WGL_SWAP_EXCHANGE_ARB:
          case WGL_SWAP_UNDEFINED_ARB:
          default:
              mSwapBehavior = EGL_BUFFER_DESTROYED;
              break;
      }
  
      return egl::Error(EGL_SUCCESS);
  }
  
  egl::Error WindowSurfaceWGL::makeCurrent()
  {
      if (!mFunctionsWGL->makeCurrent(mDeviceContext, mWGLContext))
      {
          // TODO: What error type here?
          return egl::Error(EGL_CONTEXT_LOST, "Failed to make the WGL context current.");
      }
  
      return egl::Error(EGL_SUCCESS);
  }
  
  egl::Error WindowSurfaceWGL::swap()
  {
      if (!mFunctionsWGL->swapBuffers(mDeviceContext))
      {
          // TODO: What error type here?
          return egl::Error(EGL_CONTEXT_LOST, "Failed to swap buffers on the child window.");
      }
  
      return egl::Error(EGL_SUCCESS);
  }
  
  egl::Error WindowSurfaceWGL::postSubBuffer(EGLint x, EGLint y, EGLint width, EGLint height)
  {
      UNIMPLEMENTED();
      return egl::Error(EGL_SUCCESS);
  }
  
  egl::Error WindowSurfaceWGL::querySurfacePointerANGLE(EGLint attribute, void **value)
  {
      UNIMPLEMENTED();
      return egl::Error(EGL_SUCCESS);
  }
  
  egl::Error WindowSurfaceWGL::bindTexImage(gl::Texture *texture, EGLint buffer)
  {
      UNIMPLEMENTED();
      return egl::Error(EGL_SUCCESS);
  }
  
  egl::Error WindowSurfaceWGL::releaseTexImage(EGLint buffer)
  {
      UNIMPLEMENTED();
      return egl::Error(EGL_SUCCESS);
  }
  
  void WindowSurfaceWGL::setSwapInterval(EGLint interval)
  {
      if (mFunctionsWGL->swapIntervalEXT)
      {
          mFunctionsWGL->swapIntervalEXT(interval);
      }
  }
  
  EGLint WindowSurfaceWGL::getWidth() const
  {
      RECT rect;
      if (!GetClientRect(mWindow, &rect))
      {
          return 0;
      }
      return rect.right - rect.left;
  }
  
  EGLint WindowSurfaceWGL::getHeight() const
  {
      RECT rect;
      if (!GetClientRect(mWindow, &rect))
      {
          return 0;
      }
      return rect.bottom - rect.top;
  }
  
  EGLint WindowSurfaceWGL::isPostSubBufferSupported() const
  {
      // PostSubBuffer extension not exposed on WGL.
      UNIMPLEMENTED();
      return EGL_FALSE;
  }
  
  EGLint WindowSurfaceWGL::getSwapBehavior() const
  {
      return mSwapBehavior;
  }
  
  }
  

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