feat: start of a basic rendering backend

1 files changed, 52 insertions, 2 deletions

diff --git a/src/core/application.cpp b/src/core/application.cpp
index d98ae4f..92bf211 100644
--- a/src/core/application.cpp
+++ b/src/core/application.cpp
@@ -1,5 +1,14 @@
 #include "application.h"
+
+#include "rendering/renderer.h"
+#include "rendering/vertex_array.h"
+#include "rendering/vertex_buffer.h"
+#include "rendering/index_buffer.h"
+#include "rendering/shader.h"
+
 #include <iostream>
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
 
 namespace Donut
 {
@@ -73,8 +82,39 @@ namespace Donut
         });
     }
 
-    void Application::on_init()     { }
-    void Application::on_shutdown() { }
+    void Application::on_init()     
+    { 
+        Renderer::init();
+
+        float vertices[3 * 7] = 
+        {
+            -0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
+             0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
+             0.0f,  0.5f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f
+        };
+
+        uint32_t indices[3] = { 0, 1, 2 };
+
+        m_vertex_array = std::shared_ptr<VertexArray>(VertexArray::create());
+        m_vertex_buffer = std::shared_ptr<VertexBuffer>(VertexBuffer::create(vertices, sizeof(vertices)));
+        
+        VertexBufferLayout layout;
+        layout.push<float>(3);
+        layout.push<float>(4);
+        m_vertex_buffer->set_layout(layout);
+
+        m_vertex_array->add_vertex_buffer(m_vertex_buffer);
+
+        m_index_buffer = std::shared_ptr<IndexBuffer>(IndexBuffer::create(indices, 3));
+        m_vertex_array->set_index_buffer(m_index_buffer);
+
+        m_shader = std::shared_ptr<Shader>(Shader::create("assets/basic.glsl"));
+    }
+
+    void Application::on_shutdown() 
+    { 
+        Renderer::shutdown();
+    }
 
     void Application::on_update()
     {
@@ -82,5 +122,15 @@ namespace Donut
 
     void Application::on_render()
     {
+        Renderer::set_clear_color({ 0.1f, 0.1f, 0.1f, 1.0f });
+        Renderer::clear();
+
+        Renderer::begin_scene();
+
+        glm::mat4 view_projection = glm::ortho(-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f);
+        
+        Renderer::submit(m_shader, m_vertex_array, glm::mat4(1.0f));
+
+        Renderer::end_scene();
     }
 }