feat: start of a basic rendering backend

1 files changed, 28 insertions, 0 deletions

diff --git a/src/platform/opengl/opengl_index_buffer.cpp b/src/platform/opengl/opengl_index_buffer.cpp
new file mode 100644
index 0000000..fac0585
--- /dev/null
+++ b/src/platform/opengl/opengl_index_buffer.cpp
@@ -0,0 +1,28 @@
+#include "opengl_index_buffer.h"
+#include <glad/glad.h>
+
+namespace Donut
+{
+    OpenGLIndexBuffer::OpenGLIndexBuffer(const uint32_t* indices, uint32_t count)
+        : m_count(count)
+    {
+        glCreateBuffers(1, &m_renderer_id);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_renderer_id);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, count * sizeof(uint32_t), indices, GL_STATIC_DRAW);
+    }
+
+    OpenGLIndexBuffer::~OpenGLIndexBuffer() 
+    {
+        glDeleteBuffers(1, &m_renderer_id);
+    }
+
+    void OpenGLIndexBuffer::bind() const 
+    {
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_renderer_id);
+    }
+
+    void OpenGLIndexBuffer::unbind() const
+    {
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    }
+};