Add simple renderer class, add example implementation

inferno/src/inferno/application.cpp

@@ -1,12 +1,16 @@
-#include <glad/glad.h>
 #include <GLFW/glfw3.h>
 
 #include "inferno/application.h"
 #include "inferno/core.h"
 #include "inferno/event/applicationevent.h"
 #include "inferno/event/event.h"
+#include "inferno/input.h"
 #include "inferno/log.h"
 #include "inferno/settings.h"
+#include "inferno/render/buffer.h"
+#include "inferno/render/context.h"
+#include "inferno/render/renderer.h"
+#include "inferno/render/shader.h"
 #include "inferno/window.h"
 
 namespace Inferno {
@@ -17,6 +21,39 @@ namespace Inferno {
 	{
 		NF_CORE_ASSERT(!s_instance, "Application already exists!");
 		s_instance = this;
+
+		// Initialize Settings
+		new Settings();
+
+		m_window = std::make_unique<Window>();
+		m_window->setEventCallback(NF_BIND_EVENT(Application::onEvent));
+
+		float vertices[] = {
+			-0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
+			 0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
+			 0.5f,  0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
+			-0.5f,  0.5f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f,
+		};
+
+		uint32_t indices[] = {
+			0, 1, 2, 2, 3, 0
+		};
+
+		m_vertexArray = std::make_shared<VertexArray>();
+
+		std::shared_ptr<VertexBuffer> vertexBuffer = std::make_shared<VertexBuffer>(vertices, sizeof(vertices));
+		vertexBuffer->setLayout({
+			{ BufferElementType::Vec3, "a_position" },
+			{ BufferElementType::Vec4, "a_color" },
+		});
+
+		m_vertexArray->addVertexBuffer(vertexBuffer);
+
+		std::shared_ptr<IndexBuffer> indexBuffer = std::make_shared<IndexBuffer>(indices, sizeof(indices));
+
+		m_vertexArray->setIndexBuffer(indexBuffer);
+
+		m_shader = std::make_unique<Shader>("assets/glsl/simple.vert", "assets/glsl/simple.frag");
 	}
 
 	Application::~Application()
@@ -27,20 +64,19 @@ namespace Inferno {
 	{
 		NF_CORE_LOG("Application startup");
 
-		// Initialize Settings
-		new Settings();
-
-		m_window = std::make_unique<Window>();
-		m_window->setEventCallback(NF_BIND_EVENT(Application::onEvent));
-
 		while(!glfwWindowShouldClose(m_window->getWindow())) {
 
 			if(glfwGetKey(m_window->getWindow(), GLFW_KEY_ESCAPE) == GLFW_PRESS) {
 				glfwSetWindowShouldClose(m_window->getWindow(), GL_TRUE);
 			}
 
-			glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
-			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+			Command::clearColor({ 0.2f, 0.3f, 0.3f, 1.0f });
+			Command::clear();
+
+			Renderer::beginScene(); // camera, lights, environment
+			m_shader->bind();
+			Renderer::submit(m_vertexArray);
+			Renderer::endScene();
 
 			m_window->update();
 		}
@@ -57,7 +93,9 @@ namespace Inferno {
 
 	bool Application::onWindowClose(WindowCloseEvent &e)
 	{
+		// Suppress unused warning
 		(void)e;
+
 		NF_CORE_INFO("WindowCloseEvent triggered");
 
 		glfwSetWindowShouldClose(m_window->getWindow(), GL_TRUE);
@@ -67,9 +105,13 @@ namespace Inferno {
 
 	bool Application::onWindowResize(WindowResizeEvent &e)
 	{
+		// Suppress unused warning
 		(void)e;
+
 		NF_CORE_INFO("WindowResizeEvent %dx%d triggered", e.getWidth(), e.getHeight());
 
+		m_window->getContext()->setViewport(0, 0, e.getWidth(), e.getHeight());
+
 		return true;
 	}
 

inferno/src/inferno/application.h

@@ -10,6 +10,9 @@ namespace Inferno {
 	class WindowResizeEvent;
 	class Window;
 
+	class VertexArray;
+	class Shader;
+
 	class Application {
 	public:
 		Application();
@@ -23,11 +26,18 @@ namespace Inferno {
 
 // -----------------------------------------
 
+		inline Window &getWindow() { return *m_window; }
+
 		static inline Application &get() { return *s_instance; }
 
 	private:
 		std::unique_ptr<Window> m_window;
 
+		//
+		std::shared_ptr<VertexArray> m_vertexArray;
+		std::unique_ptr<Shader> m_shader;
+		//
+
 		static Application* s_instance;
 	};
 
@@ -37,3 +47,30 @@ namespace Inferno {
 }
 
 #endif // APPLICATION_H
+
+// Gameplan
+// v Entrypoint
+// v Logging
+// v Events
+// v Window
+// v Settings loader (json)
+// v Input polling
+// v OpenGL context
+// - GPUDriver (?)
+// v Renderer
+//   v Buffers
+//   ~ Shader
+//   - Schene (camera, lights, environment)
+// - Texture loading
+// - Model loading
+// - Entity Component System
+// - Serialization
+// - Level format
+// - Tools (Tiled?)
+// - Scripting (Lua)
+
+// - Global object access can be done in 3 ways:
+// - Singleton, static, extern
+
+// @Todo
+// - Settings should contain all file paths (ex: shaders)

inferno/src/inferno/render/renderer.cpp

@@ -0,0 +1,41 @@
+#include <glad/glad.h>
+
+#include "inferno/render/buffer.h"
+#include "inferno/render/renderer.h"
+
+namespace Inferno {
+
+	void Command::clear()
+	{
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	}
+
+	void Command::clearColor(const glm::vec4 &color)
+	{
+		glClearColor(color.r, color.g, color.b, color.a);
+	}
+
+	void Command::drawIndexed(const std::shared_ptr<VertexArray> &vertexArray)
+	{
+		glDrawElements(GL_TRIANGLES, vertexArray->getIndexBuffer()->getCount(), GL_UNSIGNED_INT, nullptr);
+	}
+
+// -----------------------------------------
+
+	void Renderer::beginScene()
+	{
+
+	}
+
+	void Renderer::endScene()
+	{
+
+	}
+
+	void Renderer::submit(const std::shared_ptr<VertexArray> &vertexArray)
+	{
+		vertexArray->bind();
+		Command::drawIndexed(vertexArray);
+	}
+
+}

inferno/src/inferno/render/renderer.h

@@ -0,0 +1,32 @@
+#ifndef RENDERER_H
+#define RENDERER_H
+
+#include <memory>  // std::shared_ptr
+
+#include <glm/vec4.hpp>
+
+namespace Inferno {
+
+	class VertexArray;
+
+	class Command {
+	public:
+		static void clear();
+		static void clearColor(const glm::vec4 &color);
+
+		static void drawIndexed(const std::shared_ptr<VertexArray> &vertexArray);
+	};
+
+// -----------------------------------------
+
+	class Renderer {
+	public:
+		static void beginScene();
+		static void endScene();
+
+		static void submit(const std::shared_ptr<VertexArray> &vertexArray);
+	};
+
+}
+
+#endif // RENDERER_H