| 1 | // Copyright (C) 2017 The Qt Company Ltd. |
|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
|---|
| 3 | |
|---|
| 4 | #include "renderbuffer_p.h" |
|---|
| 5 | #include <QOpenGLContext> |
|---|
| 6 | #include <QOpenGLFunctions> |
|---|
| 7 | |
|---|
| 8 | QT_BEGIN_NAMESPACE |
|---|
| 9 | |
|---|
| 10 | namespace Qt3DRender { |
|---|
| 11 | namespace Render { |
|---|
| 12 | namespace OpenGL { |
|---|
| 13 | |
|---|
| 14 | RenderBuffer::RenderBuffer(int width, int height, QAbstractTexture::TextureFormat format) |
|---|
| 15 | : m_size(width, height), |
|---|
| 16 | m_format(format), |
|---|
| 17 | m_renderBuffer(0), |
|---|
| 18 | m_context(nullptr) |
|---|
| 19 | { |
|---|
| 20 | QOpenGLContext *ctx = QOpenGLContext::currentContext(); |
|---|
| 21 | if (!ctx) { |
|---|
| 22 | qWarning(msg: "Renderbuffer requires an OpenGL context" ); |
|---|
| 23 | return; |
|---|
| 24 | } |
|---|
| 25 | |
|---|
| 26 | m_context = ctx; |
|---|
| 27 | QOpenGLFunctions *f = ctx->functions(); |
|---|
| 28 | f->glGenRenderbuffers(n: 1, renderbuffers: &m_renderBuffer); |
|---|
| 29 | if (!m_renderBuffer) |
|---|
| 30 | return; |
|---|
| 31 | |
|---|
| 32 | f->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: m_renderBuffer); |
|---|
| 33 | while (f->glGetError() != GL_NO_ERROR) { } |
|---|
| 34 | f->glRenderbufferStorage(GL_RENDERBUFFER, internalformat: format, width, height); |
|---|
| 35 | GLint err = f->glGetError(); |
|---|
| 36 | if (err != GL_NO_ERROR) |
|---|
| 37 | qWarning(msg: "Failed to set renderbuffer storage: error 0x%x" , err); |
|---|
| 38 | f->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: 0); |
|---|
| 39 | } |
|---|
| 40 | |
|---|
| 41 | RenderBuffer::~RenderBuffer() |
|---|
| 42 | { |
|---|
| 43 | if (m_renderBuffer) { |
|---|
| 44 | QOpenGLContext *ctx = QOpenGLContext::currentContext(); |
|---|
| 45 | |
|---|
| 46 | // Ignore the fact that renderbuffers are sharable resources and let's |
|---|
| 47 | // just expect that the context is the same as when the resource was |
|---|
| 48 | // created. QOpenGLTexture suffers from the same limitation anyway, and |
|---|
| 49 | // this is unlikely to become an issue within Qt 3D. |
|---|
| 50 | if (ctx == m_context) { |
|---|
| 51 | ctx->functions()->glDeleteRenderbuffers(n: 1, renderbuffers: &m_renderBuffer); |
|---|
| 52 | } else { |
|---|
| 53 | qWarning(msg: "Wrong current context; renderbuffer not destroyed" ); |
|---|
| 54 | } |
|---|
| 55 | } |
|---|
| 56 | } |
|---|
| 57 | |
|---|
| 58 | void RenderBuffer::bind() |
|---|
| 59 | { |
|---|
| 60 | if (!m_renderBuffer) |
|---|
| 61 | return; |
|---|
| 62 | |
|---|
| 63 | m_context->functions()->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: m_renderBuffer); |
|---|
| 64 | } |
|---|
| 65 | |
|---|
| 66 | void RenderBuffer::release() |
|---|
| 67 | { |
|---|
| 68 | if (!m_context) |
|---|
| 69 | return; |
|---|
| 70 | |
|---|
| 71 | m_context->functions()->glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer: 0); |
|---|
| 72 | } |
|---|
| 73 | |
|---|
| 74 | } // namespace OpenGL |
|---|
| 75 | } // namespace Render |
|---|
| 76 | } // namespace Qt3DRender |
|---|
| 77 | |
|---|
| 78 | QT_END_NAMESPACE |
|---|
| 79 | |
|---|
