context.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "flutter/shell/platform/windows/egl/context.h"
 
#include "flutter/shell/platform/windows/egl/egl.h"
 
namespace flutter {
namespace egl {
 
Context::Context(EGLDisplay display, EGLContext context)
    : display_(display), context_(context) {}
 
Context::~Context() {
  if (display_ == EGL_NO_DISPLAY && context_ == EGL_NO_CONTEXT) {
    return;
  }
 
  if (::eglDestroyContext(display_, context_) != EGL_TRUE) {
    WINDOWS_LOG_EGL_ERROR;
  }
}
 
bool Context::IsCurrent() const {
  return ::eglGetCurrentContext() == context_;
}
 
bool Context::MakeCurrent() const {
  const auto result =
      ::eglMakeCurrent(display_, EGL_NO_SURFACE, EGL_NO_SURFACE, context_);
  if (result != EGL_TRUE) {
    WINDOWS_LOG_EGL_ERROR;
    return false;
  }
 
  return true;
}
 
bool Context::ClearCurrent() const {
  const auto result = ::eglMakeCurrent(display_, EGL_NO_SURFACE, EGL_NO_SURFACE,
                                       EGL_NO_CONTEXT);
  if (result != EGL_TRUE) {
    WINDOWS_LOG_EGL_ERROR;
    return false;
  }
 
  return true;
}
 
const EGLContext& Context::GetHandle() const {
  return context_;
}
 
}  // namespace egl
}  // namespace flutter