1 files changed, 58 insertions, 0 deletions
diff --git a/src/platform/opengl/opengl_vertex_array.cpp b/src/platform/opengl/opengl_vertex_array.cpp
new file mode 100644
index 0000000..01e6f56
--- /dev/null
+++ b/src/platform/opengl/opengl_vertex_array.cpp
@@ -0,0 +1,58 @@
+#include <glad/glad.h>
+
+#include "opengl_vertex_array.h"
+#include "rendering/vertex_buffer.h"
+#include "rendering/index_buffer.h"
+
+namespace Donut
+{
+    OpenGLVertexArray::OpenGLVertexArray()
+    {
+        // 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);
+    }
+
+    OpenGLVertexArray::~OpenGLVertexArray() 
+    {
+        glDeleteVertexArrays(1, &m_renderer_id);
+    }
+
+    auto OpenGLVertexArray::bind() const -> void
+    {
+        glBindVertexArray(m_renderer_id);
+    }
+
+    auto OpenGLVertexArray::unbind() const -> void
+    {
+        glBindVertexArray(0);
+    }
+
+    auto OpenGLVertexArray::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()) 
+        {
+            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 OpenGLVertexArray::set_index_buffer(const Ref<IndexBuffer>& index_buffer) -> void
+    {
+        glBindVertexArray(m_renderer_id);
+        index_buffer->bind();
+        m_index_buffer = index_buffer;
+    }
+};