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95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/******************************************************************************
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* File - frame_buffer.h
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* Author - Joey Pollack
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* Date - 2022/07/13 (y/m/d)
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* Mod Date - 2022/07/13 (y/m/d)
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* Description - OpenGL Frame buffer object
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******************************************************************************/
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#include "frame_buffer.h"
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#include "texture.h"
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#include <utils/logger.h>
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#include <glad/gl.h>
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namespace lunarium
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{
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FrameBuffer::FrameBuffer()
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: mGLID(0), mTexture(nullptr), mRenderBufferID(0)
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{
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}
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FrameBuffer* FrameBuffer::Create(int width, int height)
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{
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FrameBuffer* fb = new FrameBuffer;
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fb->Resize(width, height);
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return fb;
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}
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void FrameBuffer::Destroy(FrameBuffer** ppBuf)
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{
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(*ppBuf)->Unbind();
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glDeleteFramebuffers(1, &(*ppBuf)->mGLID);
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(*ppBuf) = nullptr;
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}
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void FrameBuffer::Resize(int width, int height)
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{
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if (mGLID != 0)
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{
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glDeleteFramebuffers(1, &mGLID);
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}
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if (mTexture)
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{
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Texture::Destroy(&mTexture);
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}
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mTexture = Texture::Create(nullptr, width, height);
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glGenFramebuffers(1, &mGLID);
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Bind();
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// Attach texture
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTexture->GetGLID(), 0);
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// Render Buffer for depth/stencil testing
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if (mRenderBufferID)
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{
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glDeleteRenderbuffers(1, &mRenderBufferID);
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}
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glGenRenderbuffers(1, &mRenderBufferID);
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glBindRenderbuffer(GL_RENDERBUFFER, mRenderBufferID);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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// Atach the render buffer
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, mRenderBufferID);
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if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
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{
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Logger::Error(LogCategory::GRAPHICS, "Failed to create FrameBuffer object");
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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Unbind();
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}
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void FrameBuffer::Bind()
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{
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glBindFramebuffer(GL_FRAMEBUFFER, mGLID);
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glViewport(0, 0, mTexture->GetWidth(), mTexture->GetHeight());
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}
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void FrameBuffer::Unbind()
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{
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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Texture* FrameBuffer::GetTexture()
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{
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return mTexture;
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}
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} |