[feat]: reduce renderer abstraction

1 files changed, 48 insertions, 19 deletions

diff --git a/src/rendering/vertex_array.cpp b/src/rendering/vertex_array.cpp
index 8045707..cddcf35 100644
--- a/src/rendering/vertex_array.cpp
+++ b/src/rendering/vertex_array.cpp
@@ -1,32 +1,61 @@
-#include "vertex_array.h"
-#include "renderer.h"
+#include <glad/glad.h>
 
-#include "platform/opengl/opengl_vertex_array.h"
-#include "platform/vulkan/vulkan_vertex_array.h"
+#include "vertex_array.h"
 
 namespace Donut
 {
-    auto VertexBufferElement::get_size_of_type(uint32_t type) -> uint32_t
+    VertexArray::VertexArray()
+    {
+        // glCreateVertexArrays is 4.5 DSA; macOS caps at 4.1. glGenVertexArrays
+        // reserves the name and the VAO is created on first bind (done below).
+        glGenVertexArrays(1, &m_renderer_id);
+    }
+
+    VertexArray::~VertexArray()
+    {
+        glDeleteVertexArrays(1, &m_renderer_id);
+    }
+
+    auto VertexArray::bind() const -> void
+    {
+        glBindVertexArray(m_renderer_id);
+    }
+
+    auto VertexArray::unbind() const -> void
     {
-        switch (type) 
+        glBindVertexArray(0);
+    }
+
+    auto VertexArray::add_vertex_buffer(const Ref<VertexBuffer>& vertex_buffer) -> void
+    {
+        glBindVertexArray(m_renderer_id);
+        vertex_buffer->bind();
+
+        const auto& layout = vertex_buffer->get_layout();
+        for (const auto& element : layout.get_elements())
         {
-            case 0x1406: return 4; // GL_FLOAT
-            case 0x1405: return 4; // GL_UNSIGNED_INT
-            case 0x1401: return 1; // GL_UNSIGNED_BYTE
-            default: return 0;
+            glEnableVertexAttribArray(m_vertex_buffer_index);
+            glVertexAttribPointer(m_vertex_buffer_index,
+                element.count,
+                element.type,
+                element.normalized ? GL_TRUE : GL_FALSE,
+                layout.get_stride(),
+                reinterpret_cast<const   void*>(static_cast<uintptr_t>(element.offset)));
+            m_vertex_buffer_index++;
         }
+
+        m_vertex_buffers.push_back(vertex_buffer);
+    }
+
+    auto VertexArray::set_index_buffer(const Ref<IndexBuffer>& index_buffer) -> void
+    {
+        glBindVertexArray(m_renderer_id);
+        index_buffer->bind();
+        m_index_buffer = index_buffer;
     }
 
     auto VertexArray::create() -> VertexArray*
     {
-        switch (Renderer::get_api()) 
-        {
-            case RendererAPI::API::OpenGL:
-                return new OpenGLVertexArray();
-            case RendererAPI::API::Vulkan:
-                return new VulkanVertexArray();
-            default:
-                return nullptr;
-        }
+        return new VertexArray();
     }
 };