Framebuffer.h

 
/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2024 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
#include "AUI/Traits/values.h"
#include "glm/fwd.hpp"
#include <AUI/Common/AString.h>
#include <cstdint>
#include <glm/glm.hpp>
#include <AUI/Common/AMap.h>
#include <AUI/Common/AVector.h>
#include <AUI/Views.h>
#include <AUI/GL/gl.h>
 
namespace gl {
    class API_AUI_VIEWS Framebuffer: public aui::noncopyable {
    public:
        
#if AUI_PLATFORM_IOS
        static constexpr auto DEFAULT_FB = 1;
#else
        static constexpr auto DEFAULT_FB = 0;
#endif
 
        class IRenderTarget {
        friend class Framebuffer;
        public:
            virtual ~IRenderTarget() = default;
 
        protected:
            virtual void onFramebufferResize(glm::u32vec2 size) = 0;
            virtual void attach(Framebuffer& to, GLenum attachmentType) = 0;
        };
 
        Framebuffer();
        Framebuffer(Framebuffer&& rhs) noexcept: mHandle(rhs.mHandle),
                                                 mSize(rhs.mSize),
                                                 mAttachedTargets(std::move(rhs.mAttachedTargets)),
                                                 mSupersamplingRatio(rhs.mSupersamplingRatio) {
            rhs.mHandle = 0;            
        }
        virtual ~Framebuffer();
 
        void bind();
        void bindForRead();
        void bindForWrite();
        static void unbind();
        void resize(glm::u32vec2 newSize);
 
        [[nodiscard]]
        std::uint32_t supersamlingRatio() const noexcept {
            return mSupersamplingRatio;
        }
 
        void setSupersamplingRatio(std::uint32_t ratio) noexcept {
            mSupersamplingRatio = ratio;
        }
 
        [[nodiscard]]
        glm::u32vec2 supersampledSize() const noexcept {
            return mSize * mSupersamplingRatio;
        }
 
        [[nodiscard]]
        glm::u32vec2 size() const noexcept {
            return mSize;
        }
 
        operator bool() const {
            return mHandle;
        }
        uint32_t getHandle() const {
            return mHandle;
        }
 
        void attach(_<IRenderTarget> renderTarget, GLenum attachmentType /* = GL_COLOR_ATTACHEMNT0 */) {
            renderTarget->attach(*this, attachmentType);
            unbind();
            mAttachedTargets << std::move(renderTarget);
        }
 
        Framebuffer& operator=(Framebuffer&& rhs) noexcept {
            if (mHandle == rhs.mHandle) {
                return *this;
            }
            std::swap(mHandle, rhs.mHandle);
            mSize = rhs.mSize;
            mSupersamplingRatio = rhs.mSupersamplingRatio;
            mAttachedTargets = std::move(rhs.mAttachedTargets);
            return *this;
        }
 
        static gl::Framebuffer* current();
 
        void bindViewport();
 
    private:
        uint32_t mHandle = 0;
        std::uint32_t mSupersamplingRatio = 1; 
        glm::u32vec2 mSize{0, 0};
        AVector<_<IRenderTarget>> mAttachedTargets;
    };
}

© 2025 AUI Framework Contributors. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. All trademarks are property of their respective owners.