| 1 | // Copyright (C) 2017 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #include "renderbuffer_p.h" |
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| 5 | #include <QtGui/QOpenGLContext> |
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| 6 | #include <QtGui/QOpenGLFunctions> |
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| 7 | |
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| 8 | QT_BEGIN_NAMESPACE |
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| 9 | |
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| 10 | namespace Qt3DRender { |
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| 11 | namespace Render { |
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| 12 | namespace Rhi { |
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| 13 | |
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| 14 | RenderBuffer::RenderBuffer(int width, int height, QAbstractTexture::TextureFormat format) |
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| 15 | : m_size(width, height), m_format(format), m_renderBuffer(0), m_context(nullptr) |
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| 16 | { |
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| 17 | QOpenGLContext *ctx = QOpenGLContext::currentContext(); |
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| 18 | if (!ctx) { |
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| 19 | qWarning(msg: "Renderbuffer requires an OpenGL context" ); |
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| 20 | return; |
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| 21 | } |
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| 22 | |
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| 23 | m_context = ctx; |
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| 24 | QOpenGLFunctions *f = ctx->functions(); |
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| 25 | f->glGenRenderbuffers(n: 1, renderbuffers: &m_renderBuffer); |
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| 26 | if (!m_renderBuffer) |
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| 27 | return; |
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| 28 | |
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| 29 | f->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: m_renderBuffer); |
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| 30 | while (f->glGetError() != GL_NO_ERROR) { } |
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| 31 | f->glRenderbufferStorage(GL_RENDERBUFFER, internalformat: format, width, height); |
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| 32 | GLint err = f->glGetError(); |
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| 33 | if (err != GL_NO_ERROR) |
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| 34 | qWarning(msg: "Failed to set renderbuffer storage: error 0x%x" , err); |
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| 35 | f->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: 0); |
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| 36 | } |
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| 37 | |
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| 38 | RenderBuffer::~RenderBuffer() |
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| 39 | { |
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| 40 | if (m_renderBuffer) { |
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| 41 | QOpenGLContext *ctx = QOpenGLContext::currentContext(); |
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| 42 | |
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| 43 | // Ignore the fact that renderbuffers are sharable resources and let's |
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| 44 | // just expect that the context is the same as when the resource was |
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| 45 | // created. QOpenGLTexture suffers from the same limitation anyway, and |
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| 46 | // this is unlikely to become an issue within Qt 3D. |
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| 47 | if (ctx == m_context) { |
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| 48 | ctx->functions()->glDeleteRenderbuffers(n: 1, renderbuffers: &m_renderBuffer); |
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| 49 | } else { |
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| 50 | qWarning(msg: "Wrong current context; renderbuffer not destroyed" ); |
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| 51 | } |
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| 52 | } |
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| 53 | } |
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| 54 | |
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| 55 | void RenderBuffer::bind() |
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| 56 | { |
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| 57 | if (!m_renderBuffer) |
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| 58 | return; |
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| 59 | |
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| 60 | m_context->functions()->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: m_renderBuffer); |
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| 61 | } |
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| 62 | |
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| 63 | void RenderBuffer::release() |
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| 64 | { |
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| 65 | if (!m_context) |
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| 66 | return; |
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| 67 | |
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| 68 | m_context->functions()->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: 0); |
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| 69 | } |
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| 70 | |
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| 71 | } // namespace Rhi |
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| 72 | } // namespace Render |
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| 73 | } // namespace Qt3DRender |
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| 74 | |
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| 75 | QT_END_NAMESPACE |
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| 76 | |
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