From c3eea71370eb94cff1fd96185458643fab6eb2c5 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Thu, 3 Nov 2022 19:47:46 +0000
Subject: Restructure how shaders are worked with

Needs a tidy-up
---
 gfx/gl/program.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 gfx/gl/program.h

(limited to 'gfx/gl/program.h')

diff --git a/gfx/gl/program.h b/gfx/gl/program.h
new file mode 100644
index 0000000..711a26d
--- /dev/null
+++ b/gfx/gl/program.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "shader.h"
+#include <GL/glew.h>
+#include <glRef.hpp>
+#include <glm/mat4x4.hpp>
+
+class Location;
+
+class Program {
+public:
+	template<typename... S> Program(const S &... srcs)
+	{
+		(glAttachShader(m_program, srcs), ...);
+		linkAndValidate();
+	}
+	virtual ~Program() = default;
+
+	class UniformLocation {
+	public:
+		UniformLocation(GLuint prog, const char * name);
+		operator auto() const
+		{
+			return location;
+		}
+
+	protected:
+		GLint location;
+	};
+
+	class RequiredUniformLocation : public UniformLocation {
+	public:
+		RequiredUniformLocation(GLuint prog, const char * name);
+	};
+
+	operator GLuint() const
+	{
+		return m_program;
+	}
+
+protected:
+	void use() const;
+	using ProgramRef = glRef<GLuint, &__glewCreateProgram, &__glewDeleteProgram>;
+	void linkAndValidate() const;
+	ProgramRef m_program;
+};
-- 
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