File RenderBuffer.cpp

File List > buffers > RenderBuffer.cpp

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#include "RenderBuffer.h"
#include "macros.h"

void RenderBuffer::_delRB()
{
    glDeleteRenderbuffers(1, &rb_ID);
    rb_ID = 0;
}

void RenderBuffer::_deepCopyFrom(const RenderBuffer& rb)
{
    rb_format = rb.rb_format;
    rb_w      = rb.rb_w;
    rb_h      = rb.rb_h;

    if (rb.rb_ID == 0)
    {
        rb_ID = 0;
        return;
    }

    glGenRenderbuffers(1, &rb_ID);
    glBindRenderbuffer(GL_RENDERBUFFER, rb_ID);
    glRenderbufferStorage(GL_RENDERBUFFER, rb_format, (GLsizei)rb_w, (GLsizei)rb_h);
}

RenderBuffer::RenderBuffer()
    : rb_format(GL_DEPTH24_STENCIL8), rb_w(SCREEN_W), rb_h(SCREEN_H)
{
    glGenRenderbuffers(1, &rb_ID);
    glBindRenderbuffer(GL_RENDERBUFFER, rb_ID);
    glRenderbufferStorage(GL_RENDERBUFFER, rb_format, SCREEN_W, SCREEN_H);
}

RenderBuffer::RenderBuffer(GLuint _type)
    : rb_format(_type), rb_w(SCREEN_W), rb_h(SCREEN_H)
{
    glGenRenderbuffers(1, &rb_ID);
    glBindRenderbuffer(GL_RENDERBUFFER, rb_ID);
    glRenderbufferStorage(GL_RENDERBUFFER, rb_format, SCREEN_W, SCREEN_H);
}

RenderBuffer::~RenderBuffer()
{
    if (GetRenderBufferID() != 0)
        _delRB();
}

void RenderBuffer::BindRenderBuffer() const
{
    glBindRenderbuffer(GL_RENDERBUFFER, rb_ID);
}

void RenderBuffer::UnbindRenderBuffer() const
{
    glBindRenderbuffer(GL_RENDERBUFFER, 0);
}

void RenderBuffer::Resize(GLuint w, GLuint h)
{
    rb_w = w;
    rb_h = h;
    glBindRenderbuffer(GL_RENDERBUFFER, rb_ID);
    glRenderbufferStorage(GL_RENDERBUFFER, rb_format, (GLsizei)w, (GLsizei)h);
}

void RenderBuffer::Resize(const glm::vec2& size)
{
    Resize((GLuint)size.x, (GLuint)size.y);
}

RenderBuffer::RenderBuffer(const RenderBuffer& rb)
{
    _deepCopyFrom(rb);
}

RenderBuffer::RenderBuffer(RenderBuffer&& rb) noexcept
{
    rb_ID     = rb.rb_ID;
    rb_format = rb.rb_format;
    rb_w      = rb.rb_w;
    rb_h      = rb.rb_h;
    rb.rb_ID  = 0;
}

RenderBuffer& RenderBuffer::operator=(const RenderBuffer& rb)
{
    if (this == &rb)
        return *this;

    if (rb_ID != 0)
        _delRB();

    _deepCopyFrom(rb);
    return *this;
}

RenderBuffer& RenderBuffer::operator=(RenderBuffer&& rb) noexcept
{
    if (this == &rb)
        return *this;

    if (rb_ID != 0)
        _delRB();

    rb_ID     = rb.rb_ID;
    rb_format = rb.rb_format;
    rb_w      = rb.rb_w;
    rb_h      = rb.rb_h;
    rb.rb_ID  = 0;
    return *this;
}