From b46a0d9369fbaa1938f0968ab216bc2d564a9c37 Mon Sep 17 00:00:00 2001
From: fschildt <florian.schildt@protonmail.com>
Date: Mon, 21 Jul 2025 16:07:28 +0200
Subject: first commit

---
 src/renderer/opengl/GlIndexBuffer.cpp | 44 +++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/renderer/opengl/GlIndexBuffer.cpp

(limited to 'src/renderer/opengl/GlIndexBuffer.cpp')

diff --git a/src/renderer/opengl/GlIndexBuffer.cpp b/src/renderer/opengl/GlIndexBuffer.cpp
new file mode 100644
index 0000000..c5bd713
--- /dev/null
+++ b/src/renderer/opengl/GlIndexBuffer.cpp
@@ -0,0 +1,44 @@
+#include <renderer/opengl/GlIndexBuffer.hpp>
+
+#include <GL/glew.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+
+void GlIndexBuffer::Init() {
+    m_CurrentIndex = 0;
+    m_Indices.reserve(16384);
+    glGenBuffers(1, &m_Id);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_Id);
+}
+
+uint32_t *GlIndexBuffer::GetData() {
+    return m_Indices.data();
+}
+
+uint32_t GlIndexBuffer::GetCount() {
+    uint32_t count = static_cast<uint32_t>(m_Indices.size());
+    return count;
+}
+
+void GlIndexBuffer::Reset() {
+    m_CurrentIndex = 0;
+    m_Indices.clear();
+}
+
+void GlIndexBuffer::PushRectangle() {
+    uint32_t current_index = m_CurrentIndex;
+    m_Indices.push_back(current_index + 0);
+    m_Indices.push_back(current_index + 1);
+    m_Indices.push_back(current_index + 2);
+    m_Indices.push_back(current_index + 0);
+    m_Indices.push_back(current_index + 2);
+    m_Indices.push_back(current_index + 3);
+    m_CurrentIndex += 4;
+}
+
+void GlIndexBuffer::TransferData() {
+    size_t size = m_Indices.size() * sizeof(uint32_t);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, m_Indices.data(), GL_STATIC_DRAW);
+}
+
-- 
cgit v1.2.3