Modified WindowSystem into full render system

This is does because EntityX doesn't guarantee system initialization order

1 files changed, 107 insertions, 0 deletions

diff --git a/src/shader.hpp b/src/shader.hpp
new file mode 100644
index 0000000..e67a4a0
--- /dev/null
+++ b/src/shader.hpp
@@ -0,0 +1,107 @@
+/**
+ * @file shader.hpp
+ *
+ * Copyright (C) 2019  Belle-Isle, Andrew <drumsetmonkey@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SHADER_HPP
+#define SHADER_HPP
+
+#include <string>
+#include <unordered_map>
+
+#include <GL/glew.h>
+
+class Shader
+{
+    private:
+        /**
+         * Reads the contents of a shader file and returns a c++ string
+         * object representing the contents
+         * @param The file path
+         * @return The shader contents
+         */
+        std::string readShader(std::string); 
+
+        /**
+         * Creates a shader from a filename and a shader type
+         * @param The file path containing the shader data
+         * @param What type of shader to create
+         * @return Memory address of shader location
+         */
+        GLuint createShader(std::string, GLenum);
+
+        GLuint program; /**< GPU Memory address of shader program */
+
+        /**
+         * Name of shader attributes and their corresponding memory
+         * locations in which the data exists
+         */
+        std::unordered_map<std::string, GLuint> attributes;
+        
+        /**
+         * Name of shader uniforms in and their corresponding memory
+         * locations in which the data exists
+         */
+        std::unordered_map<std::string, GLuint> uniforms;
+    public:
+        Shader(): program(-1) {}
+        /**
+         * Given the file paths of two shaders, create a shader program.
+         * @param v The file path of the vertex shader file.
+         * @param f The file path of the fragment shader file.
+         * @return The GPU Memory location of the shader program
+         */
+        GLuint createProgram(std::string v, std::string f); 
+
+        /**
+         * Finds and binds an attribute to the current shader if possible
+         * @param The attribute to bind in the shader
+         * @return The memory address of the new attribute, or -1 if the
+         * attribute doesn't exist in the shader
+         */
+        GLint addAttribute(std::string);
+        /**
+         * Finds and binds a uniform to the current shader if possible
+         * @param The uniform to bind in the shader
+         * @return The memory address of the new uniform, or -1 if the
+         * uniform doesn't exist in the shader
+         */
+        GLint addUniform(std::string);
+
+        /**
+         * Finds the GPU memory address of the given attribute in the shader
+         * program
+         * @param The attribute to find
+         * @return The attribute memory location, or -1 if it doesn't exist
+         */
+        GLint getAttribute(std::string);
+        /**
+         * Finds the GPU memory address of the given uniform in the shader
+         * program
+         * @param The uniform to find
+         * @return The uniform memory location, or -1 if it doesn't exist
+         */
+        GLint getUniform(std::string);
+
+        /**
+         * Gets the memory address of the program stored in this object
+         * @return The GPU memory address of the shader program stored
+         */
+        GLuint getProgram();
+};
+
+#endif // SHADER_HPP