mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-29 13:29:46 +00:00
85 lines
1.6 KiB
C++
85 lines
1.6 KiB
C++
//
|
|
// TextureTarget.hpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 07/02/2016.
|
|
// Copyright © 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#ifndef TextureTarget_hpp
|
|
#define TextureTarget_hpp
|
|
|
|
#include "OpenGL.hpp"
|
|
#include "Shaders/Shader.hpp"
|
|
#include <memory>
|
|
|
|
namespace OpenGL {
|
|
|
|
/*!
|
|
A @c TextureTarget is a framebuffer that can be bound as a texture. So this class
|
|
handles render-to-texture framebuffer objects.
|
|
*/
|
|
class TextureTarget {
|
|
public:
|
|
/*!
|
|
Creates a new texture target.
|
|
|
|
Throws ErrorFramebufferIncomplete if creation fails. Leaves both the generated texture and framebuffer bound.
|
|
|
|
@param width The width of target to create.
|
|
@param height The height of target to create.
|
|
@param texture_unit A texture unit on which to bind the texture.
|
|
*/
|
|
TextureTarget(GLsizei width, GLsizei height, GLenum texture_unit);
|
|
~TextureTarget();
|
|
|
|
/*!
|
|
Binds this target as a framebuffer and sets the @c glViewport accordingly.
|
|
*/
|
|
void bind_framebuffer();
|
|
|
|
/*!
|
|
Binds this target as a texture.
|
|
*/
|
|
void bind_texture();
|
|
|
|
/*!
|
|
@returns the width of the texture target.
|
|
*/
|
|
GLsizei get_width()
|
|
{
|
|
return _width;
|
|
}
|
|
|
|
/*!
|
|
@returns the height of the texture target.
|
|
*/
|
|
GLsizei get_height()
|
|
{
|
|
return _height;
|
|
}
|
|
|
|
/*!
|
|
|
|
*/
|
|
void draw(float aspect_ratio);
|
|
|
|
enum {
|
|
ErrorFramebufferIncomplete
|
|
};
|
|
|
|
private:
|
|
GLuint _framebuffer, _texture;
|
|
GLsizei _width, _height;
|
|
GLsizei _expanded_width, _expanded_height;
|
|
GLenum _texture_unit;
|
|
|
|
std::unique_ptr<Shader> _pixel_shader;
|
|
GLuint _drawing_vertex_array, _drawing_array_buffer;
|
|
float _set_aspect_ratio;
|
|
};
|
|
|
|
}
|
|
|
|
#endif /* TextureTarget_hpp */
|