Shader stuff.

Escape-the-Dawn/Escape-the-Dawn.vcxproj

@@ -109,6 +109,7 @@
     <ClInclude Include="glerror.h" />
     <ClInclude Include="Model.h" />
     <ClInclude Include="Renderer\Renderer.h" />
+    <ClInclude Include="ShaderProgram.h" />
     <ClInclude Include="Systems\InputSystem.h" />
     <ClInclude Include="System.h" />
     <ClInclude Include="Systems\CollisionSystem.h" />

Escape-the-Dawn/Escape-the-Dawn.vcxproj.filters

@@ -61,6 +61,7 @@
     <ClInclude Include="Components\TransformComponent.h">
       <Filter>Components</Filter>
     </ClInclude>
+    <ClInclude Include="ShaderProgram.h" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Shaders\Fragment.glsl">

Escape-the-Dawn/Renderer/Renderer.cpp

@@ -2,7 +2,7 @@
 
 Renderer::Renderer()
 {
-
+	glEnable(GL_DEPTH_TEST);
 }
 
 void Renderer::Draw()
@@ -10,7 +10,7 @@ void Renderer::Draw()
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 	glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
 
-	glUseProgram(shaderProgram);
+	m_ShaderProgram->Bind();
 }
 
 void Renderer::DrawText()
@@ -32,65 +32,7 @@ void Renderer::AddObjectToDraw()
 
 void Renderer::LoadContent()
 {
-	glEnable(GL_DEPTH_TEST);
+	m_ShaderProgram->AddShader(std::unique_ptr<Shader>(new VertexShader("Shaders/Vertex.glsl")));
-	LOG_INFO("Compiling Shader");
+	m_ShaderProgram->AddShader(std::unique_ptr<Shader>(new FragmentShader("Shaders/Fragment.glsl")));
-
+	m_ShaderProgram->Link();
-	GLuint vertexShader = CompileShader(GL_VERTEX_SHADER, "Shaders/Vertex.glsl");
-	GLuint fragmentShader = CompileShader(GL_FRAGMENT_SHADER, "Shaders\Fragment.glsl");
-
-	shaderProgram = glCreateProgram();
-	glAttachShader(shaderProgram, vertexShader);
-	glAttachShader(shaderProgram, fragmentShader);
-	LOG_INFO("Linking shader program...");
-	glLinkProgram(shaderProgram);
-	if(GLERROR("glLinkProgram"))
-		exit(EXIT_FAILURE);
-
 }
-
-GLuint Renderer::CompileShader(GLenum shaderType, std::string fileName)
-{
-	std::string shaderFile;
-	std::ifstream in(fileName, std::ios::in);
-
-	if(!in)
-	{
-		LOG_ERROR("Error: Failed to open shader file %s", fileName);
-		return 0;
-	}
-	in.seekg(0, std::ios::end);
-	shaderFile.resize((int)in.tellg());
-	in.seekg(0, std::ios::beg);
-	in.read(&shaderFile[0], shaderFile.size());
-	in.close();
-
-	GLuint shader = glCreateShader(shaderType); //GL_VERTEX_SHADER, GL_FRAGMENT_SHADER
-	if(GLERROR("glCreateShader"))
-		return 0;
-
-	const GLchar* shaderFiles = shaderFile.c_str();
-	const GLint length = shaderFile.length();
-	glShaderSource(shader, 1, &shaderFiles, &length);
-	if(GLERROR("glShaderSource"))
-		return 0;
-
-	glCompileShader(shader);
-	GLint compileStatus;
-	glGetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus);
-	if(compileStatus != GL_TRUE)
-	{
-		GLsizei infoLogLength;
-		glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength);
-		GLchar* infolog = new GLchar[infoLogLength];
-		glGetShaderInfoLog(shader, infoLogLength, &infoLogLength, infolog);
-		std::cerr << infolog << std::endl;
-		delete[] infolog;
-	}
-
-	if(GLERROR("glCompileShader"))
-		return 0;
-
-	return shader;
-
-}
-

Escape-the-Dawn/Renderer/Renderer.h

@@ -16,12 +16,12 @@
 #include <glm/gtc/type_ptr.hpp>
 
 #include "glerror.h"
-
+#include "ShaderProgram.h"
 
 class Renderer
 {
 public:
-	GLuint shaderProgram;
+	std::shared_ptr<ShaderProgram> m_ShaderProgram;
 	GLuint VAO;
 
 	std::vector<std::vector<float>> Vertices;

Escape-the-Dawn/ShaderProgram.h

@@ -0,0 +1,189 @@
+#ifndef ShaderProgram_h__
+#define ShaderProgram_h__
+
+#include <memory>
+#include <string>
+#include <fstream>
+#include <vector>
+
+#define _CRT_SECURE_NO_WARNINGS
+#include <GL/glew.h>
+#define GLFW_INCLUDE_GLU
+#include <GLFW/glfw3.h>
+#include <glext.h>
+
+#include "glerror.h"
+
+class Shader
+{
+public:
+	static GLuint CompileShader(GLenum shaderType, std::string fileName)
+	{
+		LOG_INFO("Compiling shader \"%s\"", fileName.c_str());
+
+		std::string shaderFile;
+		std::ifstream in(fileName, std::ios::in);
+		if(!in)
+		{
+			LOG_ERROR("Error: Failed to open shader file \"%s\"", fileName.c_str());
+			return 0;
+		}
+		in.seekg(0, std::ios::end);
+		shaderFile.resize((int)in.tellg());
+		in.seekg(0, std::ios::beg);
+		in.read(&shaderFile[0], shaderFile.size());
+		in.close();
+
+		GLuint shader = glCreateShader(shaderType);
+		if(GLERROR("glCreateShader"))
+			return 0;
+
+		const GLchar* shaderFiles = shaderFile.c_str();
+		const GLint length = shaderFile.length();
+		glShaderSource(shader, 1, &shaderFiles, &length);
+		if(GLERROR("glShaderSource"))
+			return 0;
+
+		glCompileShader(shader);
+
+		GLint compileStatus;
+		glGetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus);
+		if(compileStatus != GL_TRUE)
+		{
+			LOG_ERROR("Shader compilation failed");
+			GLsizei infoLogLength;
+			glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength);
+			GLchar* infolog = new GLchar[infoLogLength];
+			glGetShaderInfoLog(shader, infoLogLength, &infoLogLength, infolog);
+			LOG_ERROR(infolog);
+			delete[] infolog;
+		}
+
+		if(GLERROR("glCompileShader"))
+			return 0;
+
+		return shader;
+	}
+
+	Shader(GLenum shaderType, std::string fileName)
+		: m_ShaderType(shaderType), m_FileName(fileName)
+	{
+		m_ShaderHandle = 0;
+	}
+
+	virtual ~Shader()
+	{
+		glDeleteShader(m_ShaderHandle);
+	}
+
+	GLuint Compile()
+	{
+		m_ShaderHandle = CompileShader(m_ShaderType, m_FileName);
+		return m_ShaderHandle;
+	}
+
+	GLenum GetType() const { return m_ShaderType; }
+	std::string GetFileName() const { return m_FileName; }
+	GLuint GetHandle() const { return m_ShaderHandle; }
+	bool IsCompiled() const { return m_ShaderHandle != 0; }
+
+protected:
+	GLenum m_ShaderType;
+	std::string m_FileName;
+	GLint m_ShaderHandle;
+};
+
+template <int SHADERTYPE>
+class ShaderType : public Shader
+{
+public:
+	ShaderType(std::string fileName) 
+		: Shader(SHADERTYPE, fileName) { }
+};
+
+class VertexShader : public ShaderType<GL_VERTEX_SHADER>
+{
+public:
+	VertexShader(std::string fileName)
+		: ShaderType(fileName) { }
+};
+
+class FragmentShader : public ShaderType<GL_FRAGMENT_SHADER>
+{
+public:
+	FragmentShader(std::string fileName)
+		: ShaderType(fileName) { }
+};
+
+class GeometryShader : public ShaderType<GL_GEOMETRY_SHADER>
+{
+public:
+	GeometryShader(std::string fileName)
+		: ShaderType(fileName) { }
+};
+
+class ShaderProgram
+{
+public:
+	ShaderProgram()
+	{
+		Initialize();
+	}
+	
+	ShaderProgram(std::string vertexShaderFile, std::string fragmentShaderFile)
+	{
+		AddShader(std::unique_ptr<Shader>(new VertexShader(vertexShaderFile)));
+		AddShader(std::unique_ptr<Shader>(new VertexShader(fragmentShaderFile)));
+		Initialize();
+	}
+
+	void AddShader(std::unique_ptr<Shader> shader)
+	{
+		if (!shader->IsCompiled()) {
+			shader->Compile();
+		}
+
+		m_Shaders.push_back(std::move(shader));
+	}
+
+	GLuint Link()
+	{
+		LOG_INFO("Linking shader program");
+		m_ShaderProgramHandle = glCreateProgram();
+		for (auto &shader : m_Shaders) {
+			glAttachShader(m_ShaderProgramHandle, shader->GetHandle());
+		}
+		glLinkProgram(m_ShaderProgramHandle);
+		if (GLERROR("glLinkProgram"))
+			return 0;
+
+		for (auto &shader : m_Shaders) {
+			shader.release();
+		}
+		m_Shaders.clear();
+	}
+
+	void Bind()
+	{
+		if (m_ShaderProgramHandle == 0)
+			return;
+
+		glActiveShaderProgram(0, m_ShaderProgramHandle);
+	}
+
+	void Unbind()
+	{
+		glActiveShaderProgram(0, 0);
+	}
+
+private:
+	GLuint m_ShaderProgramHandle;
+	std::vector<std::unique_ptr<Shader>> m_Shaders;
+	
+	void Initialize()
+	{
+		m_ShaderProgramHandle = 0;
+	}
+};
+
+#endif // ShaderProgram_h__

Escape-the-Dawn/Shaders/Fragment.glsl

@@ -0,0 +1,18 @@
+#version 440
+
+uniform mat4 MVP;
+uniform sampler2D texture0;
+
+in VertexData {
+	vec3 Position;
+	vec3 Color;
+	vec2 TextureCoord;
+} Input;
+
+out vec4 FragmentColor;
+
+void main()
+{
+	vec4 texel = texture2D(texture0, Input.TextureCoord);
+	FragmentColor = texel * vec4(Input.Color, 0);
+}

Escape-the-Dawn/Shaders/Vertex.glsl

@@ -0,0 +1,22 @@
+#version 440
+
+uniform mat4 MVP;
+
+layout(location = 0) in vec3 Position;
+layout(location = 1) in vec3 Normal;
+layout(location = 2) in vec2 TextureCoord;
+
+out VertexData {
+	vec3 Position;
+	vec3 Normal;
+	vec2 TextureCoord;
+} Output;
+
+void main()
+{
+	gl_Position = MVP * vec4(Position, 1.0);
+
+	Output.Position = Position;
+	Output.Normal = Normal;
+	Output.TextureCoord = TextureCoord;
+}