feat: start of a basic rendering backend

1 files changed, 61 insertions, 0 deletions

diff --git a/src/rendering/renderer.cpp b/src/rendering/renderer.cpp
new file mode 100644
index 0000000..1da5034
--- /dev/null
+++ b/src/rendering/renderer.cpp
@@ -0,0 +1,61 @@
+#include "renderer.h"
+#include "platform/opengl/opengl_renderer_api.h"
+#include <memory>
+#include <glm/gtc/matrix_transform.hpp>
+
+namespace Donut {
+
+    Scope<RendererAPI> RendererAPI::create() {
+        switch (s_api) {
+            case API::OpenGL:
+                return std::make_unique<OpenGLRendererAPI>();
+            default:
+                return nullptr;
+        }
+    }
+
+    RendererAPI::API RendererAPI::s_api = RendererAPI::API::OpenGL;
+
+    Renderer::SceneData* Renderer::s_scene_data = new Renderer::SceneData;
+
+    void Renderer::init() {
+        RenderCommand::init();
+    }
+
+    void Renderer::shutdown() {
+        delete s_scene_data;
+    }
+
+    void Renderer::on_window_resize(uint32_t width, uint32_t height) {
+        RenderCommand::set_viewport(0, 0, width, height);
+    }
+
+    void Renderer::begin_scene() {
+        s_scene_data->ViewProjectionMatrix = glm::ortho(-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f);
+    }
+
+    void Renderer::end_scene() {
+    }
+
+    void Renderer::submit(const std::shared_ptr<Shader>& shader, 
+                         const std::shared_ptr<VertexArray>& vertex_array,
+                         const glm::mat4& transform) {
+        shader->bind();
+        shader->set_mat4("u_ViewProjection", s_scene_data->ViewProjectionMatrix);
+        shader->set_mat4("u_Transform", transform);
+
+        vertex_array->bind();
+        RenderCommand::draw_indexed(vertex_array);
+    }
+
+    Scope<RendererAPI> RenderCommand::s_renderer_api = RendererAPI::create();
+
+    void Renderer::set_clear_color(const glm::vec4& color) {
+        RenderCommand::set_clear_color(color);
+    }
+
+    void Renderer::clear() {
+        RenderCommand::clear();
+    }
+
+}