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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the Viewport render node declaration.
#ifndef O3D_CORE_CROSS_VIEWPORT_H_
#define O3D_CORE_CROSS_VIEWPORT_H_
#include "core/cross/render_node.h"
namespace o3d {
// A Viewport is a render node that sets the render viewport and depth range.
// It uses a Float4 in the format (left, top, width, height) where left, top,
// width and height are in a 0.0 to 1.0 range that represent positions and
// dimensions relative to the size of the client's rendering area. The depth
// range is represented by a Float2 in the format (min Z, max Z)
//
// Note: The viewport values must describe a rectangle that is 100% inside the
// client area. In other words, (0.5, 0.0, 1.0, 1.0) would describe an area that
// is 1/2 off right side of the screen. That is an invalid value and will be
// clipped to (0.5, 0.0, 0.5, 1.0).
class Viewport : public RenderNode {
public:
typedef SmartPointer<Viewport> Ref;
// Gets the viewport.
const Float4 viewport() const {
return viewport_param_->value();
}
// Sets the viewport.
void set_viewport(const Float4& value) {
viewport_param_->set_value(value);
}
// Gets the depth range.
const Float2 depth_range() const {
return depth_range_param_->value();
}
// Sets the depth range.
void set_depth_range(const Float2& value) {
depth_range_param_->set_value(value);
}
// Names of Viewport Params.
static const char* kViewportParamName;
static const char* kDepthRangeParamName;
// Overridden from RenderNode. Sets the viewport.
virtual void Render(RenderContext* render_context);
// Overridden from RenderNode. Restores the viewport.
virtual void PostRender(RenderContext* render_context);
private:
explicit Viewport(ServiceLocator* service_locator);
friend class IClassManager;
static ObjectBase::Ref Create(ServiceLocator* service_locator);
ParamFloat4::Ref viewport_param_; // viewport (left, top, width, height)
ParamFloat2::Ref depth_range_param_; // minZ (def. 0.0), maxZ (def. 1.0)
Float4 old_viewport_;
Float2 old_depth_range_;
O3D_DECL_CLASS(Viewport, RenderNode);
DISALLOW_COPY_AND_ASSIGN(Viewport);
};
} // namespace o3d
#endif // O3D_CORE_CROSS_VIEWPORT_H_
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