From e360e95dcbdc8868e50cfb515942d796619aca21 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 17 Feb 2021 01:01:55 +0000
Subject: Support multiple shader programs, set by model

---
 gfx/gl/shader.h | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

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

diff --git a/gfx/gl/shader.h b/gfx/gl/shader.h
index a839b9b..98e0348 100644
--- a/gfx/gl/shader.h
+++ b/gfx/gl/shader.h
@@ -2,17 +2,20 @@
 #define SHADER_INCLUDED_H
 
 #include <GL/glew.h>
+#include <array>
 #include <glRef.hpp>
 #include <glm/glm.hpp>
 #include <string_view>
 
 class Shader {
 public:
+	enum class Program { Basic = 0 };
+
 	Shader();
 
-	void Bind() const;
 	void setView(glm::mat4 view) const;
-	void setModel(glm::mat4 model) const;
+	void setModel(glm::mat4 model, Program = Program::Basic) const;
+	void setLight(glm::vec3 dir) const;
 
 private:
 	class Source {
@@ -27,10 +30,16 @@ private:
 
 	static void CheckShaderError(GLuint shader, GLuint flag, bool isProgram, std::string_view errorMessage);
 
-	using ProgramRef = glRef<GLuint, __glewCreateProgram, __glewDeleteProgram>;
+	class ProgramHandle {
+	public:
+		ProgramHandle(std::initializer_list<GLuint>);
+		using ProgramRef = glRef<GLuint, __glewCreateProgram, __glewDeleteProgram>;
+
+		ProgramRef m_program;
+		GLint viewProjection_uniform, model_uniform, lightDir_uniform;
+	};
 
-	ProgramRef m_program;
-	GLint viewProjection_uniform, model_uniform, lightDir_uniform;
+	std::array<ProgramHandle, 1> programs;
 };
 
 #endif
-- 
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