Strange attractors with OpenCL
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#pragma once
#include <moggle/core/gl.hpp>
#include "renderbuffer.hpp"
#include "texture.hpp"
#include <vector>
/*
* One can attach either an external renderbuffer/texture, or move one into fbo
* In the latter case, the fbo will own the renderbuffer/texture
*
* Attachment can be one of: GL_COLOR_ATTACHMENT0, GL_DEPTH_ATTACHMENT, or GL_STENCIL_ATTACHMENT
*/
namespace moggle {
struct fbo {
explicit fbo(bool create_now = false) {
if(create_now) create();
}
~fbo() { destroy(); }
fbo(fbo const &) = delete;
fbo & operator=(fbo const&) = delete;
fbo(fbo && r) : id(r.id) { r.id = 0; }
fbo & operator=(fbo && r) { std::swap(id, r.id); return *this; }
bool created() const { return id; }
explicit operator bool() const { return created(); }
void create(){ if(!id) gl::generate_framebuffers(1, &id); }
void destroy(){ gl::delete_renderbuffers(1, &id); id = 0; }
void bind() {
create();
gl::bind_framebuffer(GL_FRAMEBUFFER, id);
}
GLuint get_id() const {
return id;
}
// Only well defined if the fbo owns the texture
texture & get_texture() {
return textures.front();
}
void attach(GLenum attachment, renderbuffer const & rb){
bind();
gl::framebuffer_renderbuffer(GL_FRAMEBUFFER, attachment, GL_RENDERBUFFER, rb.get_id());
}
void attach(GLenum attachment, renderbuffer && rb){
renderbuffers.push_back(std::move(rb));
attach(attachment, renderbuffers.back());
}
void attach(GLenum attachment, GLenum textarget, texture const & t){
bind();
gl::framebuffer_texture_2d(GL_FRAMEBUFFER, attachment, textarget, t.get_id(), 0);
}
void attach(GLenum attachment, GLenum textarget, texture && t){
textures.push_back(std::move(t));
attach(attachment, textarget, textures.back());
}
void clear(GLenum bufferbits){
bind();
gl::clear(bufferbits);
}
static fbo create_default(GLsizei width, GLsizei height){
fbo f;
f.attach(GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture::create(width, height, GL_RGBA32F));
f.attach(GL_DEPTH_ATTACHMENT, renderbuffer::create(width, height, 1, GL_DEPTH_COMPONENT16));
f.clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
return f;
}
private:
std::vector<renderbuffer> renderbuffers;
std::vector<texture> textures;
GLuint id = 0;
};
}