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Diffstat (limited to 'src/runtimerender/Qt3DSRenderSubPresentationHelper.h')
| -rw-r--r-- | src/runtimerender/Qt3DSRenderSubPresentationHelper.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/runtimerender/Qt3DSRenderSubPresentationHelper.h b/src/runtimerender/Qt3DSRenderSubPresentationHelper.h new file mode 100644 index 0000000..d77c7a7 --- /dev/null +++ b/src/runtimerender/Qt3DSRenderSubPresentationHelper.h @@ -0,0 +1,69 @@ +/**************************************************************************** +** +** Copyright (C) 2008-2012 NVIDIA Corporation. +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of Qt 3D Studio. +** +** $QT_BEGIN_LICENSE:GPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 or (at your option) any later version +** approved by the KDE Free Qt Foundation. The licenses are as published by +** the Free Software Foundation and appearing in the file LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#pragma once +#ifndef QT3DS_RENDER_SUB_PRESENTATION_HELPER_H +#define QT3DS_RENDER_SUB_PRESENTATION_HELPER_H +#include "Qt3DSRenderContextCore.h" +#include "Qt3DSRenderer.h" +#include "render/Qt3DSRenderContext.h" + +namespace qt3ds { +namespace render { + + // Small helper object to setup the state needed to render a sub presentation + // correctly. Sub presentations may have transparency, and if they do then + // then need to be rendered with pre multiple alpha disabled. If they don't, + // then they need to be rendered with pre-multiply alpha enabled (and have the alpha channel + // set to 1 + struct SSubPresentationHelper + { + IQt3DSRenderContext &m_RenderContext; + QSize m_PreviousPresentationDimensions; + + bool m_WasInSubPresentation; + + SSubPresentationHelper(IQt3DSRenderContext &inContext, + const QSize &inPresDimensions) + : m_RenderContext(inContext) + , m_PreviousPresentationDimensions(inContext.GetCurrentPresentationDimensions()) + , m_WasInSubPresentation(inContext.IsInSubPresentation()) + { + m_RenderContext.SetInSubPresentation(true); + m_RenderContext.SetPresentationDimensions(inPresDimensions); + } + ~SSubPresentationHelper() + { + m_RenderContext.SetInSubPresentation(m_WasInSubPresentation); + m_RenderContext.SetPresentationDimensions(m_PreviousPresentationDimensions); + } + }; +} +} +#endif
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