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