Elevate::OpenGLFrameBuffer Class Reference

#include <OpenGLFrameBuffer.h>

Inheritance diagram for Elevate::OpenGLFrameBuffer:

Public Member Functions
	OpenGLFrameBuffer (TexturePtr tex)
void	Bind () const override
void	Unbind () const override
void	BlitFramebufferToScreen (uint32_t screenWidth, uint32_t screenHeight) const override
void	Rescale (uint32_t width, uint32_t height) override
uint32_t	GetFrameBufferId () const override
Public Member Functions inherited from Elevate::Framebuffer
virtual	~Framebuffer ()=default
void *	GetNativeTextureHandle () const
void	SetClearColor (glm::vec4 color)
virtual void	Clear () const

Additional Inherited Members
Static Public Member Functions inherited from Elevate::Framebuffer
static Framebuffer *	Create (uint32_t width=1280, uint32_t height=720)
Protected Member Functions inherited from Elevate::Framebuffer
	Framebuffer (TexturePtr tex)
Protected Attributes inherited from Elevate::Framebuffer
TexturePtr	m_texture
glm::vec4	m_clearColor = { 1.0f, 1.0f, 1.0f, 1.0f }

Detailed Description

Definition at line 6 of file OpenGLFrameBuffer.h.

Constructor & Destructor Documentation

OpenGLFrameBuffer()

Elevate::OpenGLFrameBuffer::OpenGLFrameBuffer

(

TexturePtr

tex

)

Definition at line 11 of file OpenGLFrameBuffer.cpp.

                                                          : Framebuffer(tex)
{
    EE_CORE_ASSERT(tex->GetWidth() > 0 && tex->GetHeight() > 0, "Framebuffer dimensions must be positive");
 
    // Creating and binding
    glGenFramebuffers(1, &m_frameBufferId);
    Bind();
 
    m_textureId = static_cast<GLuint>(reinterpret_cast<intptr_t>(tex->GetNativeHandle()));
 
    // Bind the texture with the Frame Buffer
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_textureId, 0);
    // render buffer
    glGenRenderbuffers(1, &m_renderBufferId);
    glBindRenderbuffer(GL_RENDERBUFFER, m_renderBufferId);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, tex->GetWidth(), tex->GetHeight());
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, m_renderBufferId);
    
    CheckCompleteness();
    Unbind();
}

Member Function Documentation

Bind()

void Elevate::OpenGLFrameBuffer::Bind ( ) const

overridevirtual

Implements Elevate::Framebuffer.

Definition at line 33 of file OpenGLFrameBuffer.cpp.

{
    glBindFramebuffer(GL_FRAMEBUFFER, m_frameBufferId);
}

BlitFramebufferToScreen()

void Elevate::OpenGLFrameBuffer::BlitFramebufferToScreen ( uint32_t  screenWidth, uint32_t  screenHeight  ) const

overridevirtual

Implements Elevate::Framebuffer.

Definition at line 43 of file OpenGLFrameBuffer.cpp.

{
    GLCheck(glBindFramebuffer(GL_READ_FRAMEBUFFER, m_frameBufferId)); // Read from this framebuffer
    GLCheck(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0)); // Draw to the main framebuffer
 
    // TODO GIVE A CHOICE TO THE USER FOR THE FILTERING
    glBlitFramebuffer(
        0, 0, m_texture->GetWidth(), m_texture->GetHeight(),
        0, 0, screenWidth, screenHeight,
        GL_COLOR_BUFFER_BIT, GL_NEAREST
    );
}

GetFrameBufferId()

uint32_t Elevate::OpenGLFrameBuffer::GetFrameBufferId ( ) const

inlineoverridevirtual

Implements Elevate::Framebuffer.

Definition at line 16 of file OpenGLFrameBuffer.h.

{ return m_frameBufferId;  }

Rescale()

void Elevate::OpenGLFrameBuffer::Rescale ( uint32_t  width, uint32_t  height  )

overridevirtual

Implements Elevate::Framebuffer.

Definition at line 56 of file OpenGLFrameBuffer.cpp.

{
    if (width == m_texture->GetWidth() && height == m_texture->GetHeight()) return;
    else if (width <= 0 || height <= 0) return;
 
    Bind();
 
    Renderer::BindTexture(m_texture);
 
    TextureMetadata meta = m_texture->GetMetadata();
    meta.Width = width;
    meta.Height = height;
 
    m_texture->SetData(nullptr, meta);
 
    // Attacher la texture redimensionn�e au framebuffer
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_textureId, 0);
 
    // Redimensionner le renderbuffer pour le depth/stencil
    glBindRenderbuffer(GL_RENDERBUFFER, m_renderBufferId);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
    glBindRenderbuffer(GL_RENDERBUFFER, 0); // Unbind renderbuffer
 
    CheckCompleteness();
    Unbind();
}

Unbind()

void Elevate::OpenGLFrameBuffer::Unbind ( ) const

overridevirtual

Implements Elevate::Framebuffer.

Definition at line 38 of file OpenGLFrameBuffer.cpp.

{
    glBindFramebuffer(GL_FRAMEBUFFER, 0);
}

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The documentation for this class was generated from the following files:

• ElevateEngine/src/ElevateEngine/Renderer/OpenGL/OpenGLFrameBuffer.h
• ElevateEngine/src/ElevateEngine/Renderer/OpenGL/OpenGLFrameBuffer.cpp