Method createFrameBuffer

src/SFML/Graphics/RenderTextureImplFBO.cpp:397–506

///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
bool RenderTextureImplFBO::createFrameBuffer()
{
    // Create the framebuffer object
    auto frameBuffer = std::make_shared<FrameBufferObject>();

    if (!frameBuffer->object)
    {
        err() << "Impossible to create render texture (failed to create the frame buffer object)" << std::endl;
        return false;
    }
    glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_FRAMEBUFFER, frameBuffer->object));

    // Link the depth/stencil renderbuffer to the frame buffer
    if (!m_multisample && m_depthStencilBuffer)
    {
        if (m_depth)
        {
            glCheck(GLEXT_glFramebufferRenderbuffer(GLEXT_GL_FRAMEBUFFER,
                                                    GLEXT_GL_DEPTH_ATTACHMENT,
                                                    GLEXT_GL_RENDERBUFFER,
                                                    m_depthStencilBuffer));
        }

        if (m_stencil)
        {
            glCheck(GLEXT_glFramebufferRenderbuffer(GLEXT_GL_FRAMEBUFFER,
                                                    GLEXT_GL_STENCIL_ATTACHMENT,
                                                    GLEXT_GL_RENDERBUFFER,
                                                    m_depthStencilBuffer));
        }
    }

    // Link the texture to the frame buffer
    glCheck(GLEXT_glFramebufferTexture2D(GLEXT_GL_FRAMEBUFFER, GLEXT_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_textureId, 0));

    // A final check, just to be sure...
    if (glCheck(GLEXT_glCheckFramebufferStatus(GLEXT_GL_FRAMEBUFFER)) != GLEXT_GL_FRAMEBUFFER_COMPLETE)
    {
        glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_FRAMEBUFFER, 0));
        err() << "Impossible to create render texture (failed to link the target texture to the frame buffer)" << std::endl;
        return false;
    }

    // Insert the FBO into our map
    m_frameBuffers.try_emplace(Context::getActiveContextId(), frameBuffer);

    // Register the object with the current context so it is automatically destroyed
    registerUnsharedGlObject(std::move(frameBuffer));

#ifndef SFML_OPENGL_ES

    if (m_multisample)
    {
        // Create the multisample framebuffer object
        auto multisampleFrameBuffer = std::make_shared<FrameBufferObject>();

        if (!multisampleFrameBuffer->object)
        {