diff options
Diffstat (limited to 'src/plugins/renderers/opengl/textures/renderbuffer.cpp')
-rw-r--r-- | src/plugins/renderers/opengl/textures/renderbuffer.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/plugins/renderers/opengl/textures/renderbuffer.cpp b/src/plugins/renderers/opengl/textures/renderbuffer.cpp new file mode 100644 index 000000000..05d6bd1fa --- /dev/null +++ b/src/plugins/renderers/opengl/textures/renderbuffer.cpp @@ -0,0 +1,114 @@ +/**************************************************************************** +** +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt3D module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or 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.GPL2 and 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-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "renderbuffer_p.h" +#include <QOpenGLContext> +#include <QOpenGLFunctions> + +QT_BEGIN_NAMESPACE + +namespace Qt3DRender { +namespace Render { +namespace OpenGL { + +RenderBuffer::RenderBuffer(int width, int height, QAbstractTexture::TextureFormat format) + : m_size(width, height), + m_format(format), + m_renderBuffer(0), + m_context(nullptr) +{ + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + if (!ctx) { + qWarning("Renderbuffer requires an OpenGL context"); + return; + } + + m_context = ctx; + QOpenGLFunctions *f = ctx->functions(); + f->glGenRenderbuffers(1, &m_renderBuffer); + if (!m_renderBuffer) + return; + + f->glBindRenderbuffer(GL_RENDERBUFFER, m_renderBuffer); + while (f->glGetError() != GL_NO_ERROR) { } + f->glRenderbufferStorage(GL_RENDERBUFFER, format, width, height); + GLint err = f->glGetError(); + if (err != GL_NO_ERROR) + qWarning("Failed to set renderbuffer storage: error 0x%x", err); + f->glBindRenderbuffer(GL_RENDERBUFFER, 0); +} + +RenderBuffer::~RenderBuffer() +{ + if (m_renderBuffer) { + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + + // Ignore the fact that renderbuffers are sharable resources and let's + // just expect that the context is the same as when the resource was + // created. QOpenGLTexture suffers from the same limitation anyway, and + // this is unlikely to become an issue within Qt 3D. + if (ctx == m_context) { + ctx->functions()->glDeleteRenderbuffers(1, &m_renderBuffer); + } else { + qWarning("Wrong current context; renderbuffer not destroyed"); + } + } +} + +void RenderBuffer::bind() +{ + if (!m_renderBuffer) + return; + + m_context->functions()->glBindRenderbuffer(GL_RENDERBUFFER, m_renderBuffer); +} + +void RenderBuffer::release() +{ + if (!m_context) + return; + + m_context->functions()->glBindRenderbuffer(GL_RENDERBUFFER, 0); +} + +} // namespace OpenGL +} // namespace Render +} // namespace Qt3DRender + +QT_END_NAMESPACE |