78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
#include <GL/glew.h>
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#include <GLFW/glfw3.h>
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#include <iostream>
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#include "fbo.h"
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FBO::FBO() : fbo_id_(-1), color_texture_id_(-1), position_texture_id_(-1), depth_rbo_id_(-1) {}
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FBO::~FBO() {
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Cleanup();
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}
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void FBO::Init(int width, int height) {
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// Generate the framebuffer
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glGenFramebuffers(1, &fbo_id_);
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glBindFramebuffer(GL_FRAMEBUFFER, fbo_id_);
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// Generate the color texture
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glGenTextures(1, &color_texture_id_);
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glBindTexture(GL_TEXTURE_2D, color_texture_id_);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0, GL_RGBA, GL_FLOAT, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color_texture_id_, 0);
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// Generate the position texture
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glGenTextures(1, &position_texture_id_);
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glBindTexture(GL_TEXTURE_2D, position_texture_id_);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0, GL_RGBA, GL_FLOAT, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, position_texture_id_, 0);
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GLenum drawBuffers[2] = {GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1};
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glDrawBuffers(2, drawBuffers);
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// RBO was causing issues. Not using for now
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// Generate the Depth renderbuffer
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glGenRenderbuffers(1, &depth_rbo_id_);
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glBindRenderbuffer(GL_RENDERBUFFER, depth_rbo_id_);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth_rbo_id_);
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// Check if the framebuffer is complete
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if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
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std::cerr << "Error: Framebuffer is not complete!" << std::endl;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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void FBO::Bind() {
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glBindFramebuffer(GL_FRAMEBUFFER, fbo_id_);
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}
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void FBO::Unbind() {
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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void FBO::Cleanup() {
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if (color_texture_id_ != -1) {
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glDeleteTextures(1, &color_texture_id_);
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}
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if (depth_rbo_id_ != -1) {
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glDeleteTextures(1, &depth_rbo_id_);
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}
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if (fbo_id_ != -1) {
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glDeleteFramebuffers(1, &fbo_id_);
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}
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}
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GLuint FBO::GetColorTexture() const {
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return color_texture_id_;
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} |