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87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
//
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// TextureTarget.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 07/02/2016.
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// Copyright 2016 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include "Outputs/OpenGL/API.hpp"
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#include "Outputs/OpenGL/OpenGL.hpp"
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#include "Shader.hpp"
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#include <memory>
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namespace Outputs::Display::OpenGL {
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/*!
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A @c TextureTarget is a framebuffer that can be bound as a texture. So this class
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handles render-to-texture framebuffer objects.
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*/
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class TextureTarget {
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public:
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/*!
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Creates a new texture target. Contents are initially undefined.
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Leaves both the generated texture and framebuffer bound.
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@throws std::runtime_error if creation fails.
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@param width The width of target to create.
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@param height The height of target to create.
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@param texture_unit A texture unit on which to bind the texture.
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@param has_stencil_buffer An 8-bit stencil buffer is attached if this is @c true; no stencil buffer is attached otherwise.
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*/
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TextureTarget(API, GLsizei width, GLsizei height, GLenum texture_unit, GLint mag_filter, bool has_stencil_buffer);
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~TextureTarget();
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TextureTarget() = default;
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TextureTarget(TextureTarget &&);
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TextureTarget &operator =(TextureTarget &&);
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TextureTarget(const TextureTarget &) = delete;
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TextureTarget &operator =(const TextureTarget &) = delete;
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/*!
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Binds this target as a framebuffer and sets the @c glViewport accordingly.
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*/
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void bind_framebuffer();
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/*!
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Binds this target as a texture.
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*/
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void bind_texture() const;
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/*!
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@returns the width of the texture target.
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*/
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GLsizei width() const {
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return width_;
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}
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/*!
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@returns the height of the texture target.
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*/
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GLsizei height() const {
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return height_;
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}
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bool empty() const {
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return framebuffer_ == 0;
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}
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void reset() {
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*this = TextureTarget();
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}
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private:
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API api_{};
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GLuint framebuffer_ = 0, texture_ = 0, renderbuffer_ = 0;
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GLsizei width_ = 0, height_ = 0;
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GLenum texture_unit_ = 0;
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};
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}
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