gl.hpp File Reference

OpenGL window, shader program, sprite, and text rendering classes. More...

#include "config.h"
#include "mx.hpp"
#include <string>
#include <memory>
#include <glad/glad.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include "console.hpp"

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Classes
class	gl::ShaderProgram
	GLSL shader program wrapper (shared-ownership). More...
struct	gl::ShaderProgram::SharedState
class	gl::GLText
	Render SDL_ttf text into an OpenGL texture and display it on screen. More...
class	gl::GLSprite
	A textured screen-space quad drawn with an OpenGL shader. More...
class	gl::GLWindow
	SDL2 + OpenGL/ES window with event loop and console support. More...
class	gl::GLObject
	Abstract interface for scene objects managed by a GLWindow. More...

Namespaces
namespace	gl

Enumerations
enum class	gl::GLMode { gl::DESKTOP , gl::ES }
	OpenGL mode: desktop GL or OpenGL ES. More...

Functions
GLuint	gl::loadTexture (const std::string &filename)
	Load a GL texture from a file.
GLuint	gl::loadTexture (const std::string &filename, int &w, int &h)
	Load a GL texture from a file and retrieve its dimensions.
void	gl::updateTexture (GLuint texture, SDL_Surface *surface, bool flip)
	Replace a GL texture's contents from an SDL_Surface.
GLuint	gl::createTexture (SDL_Surface *surface, bool flip)
	Create a new GL texture from an SDL_Surface.
GLuint	gl::createTexture (void *buffer, int width, int height)
	Create a new GL texture from a raw pixel buffer.
SDL_Surface *	gl::createSurface (int w, int h)
	Allocate a blank RGBA SDL_Surface.

Detailed Description

OpenGL window, shader program, sprite, and text rendering classes.

Provides the core OpenGL abstractions used by libmx applications:

• ShaderProgram – GLSL vertex/fragment shader compilation and uniform upload.
• GLText – SDL_ttf text rendered into an OpenGL texture.
• GLSprite – A textured quad rendered with an arbitrary shader.
• GLWindow – SDL2 + OpenGL/ES window and event loop.
• GLObject – Abstract interface for scene objects attached to GLWindow.

Requires the WITH_GL compile-time flag.

Definition in file gl.hpp.