From 50cdd344a3ed87c75a67739e2ffd34762e9b0895 Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Tue, 12 Aug 2025 18:12:37 +0200
Subject: feat: start of a basic rendering backend

---
 src/platform/opengl/opengl_renderer_api.cpp | 34 +++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 src/platform/opengl/opengl_renderer_api.cpp

(limited to 'src/platform/opengl/opengl_renderer_api.cpp')

diff --git a/src/platform/opengl/opengl_renderer_api.cpp b/src/platform/opengl/opengl_renderer_api.cpp
new file mode 100644
index 0000000..9fb911a
--- /dev/null
+++ b/src/platform/opengl/opengl_renderer_api.cpp
@@ -0,0 +1,34 @@
+#include "opengl_renderer_api.h"
+#include <glad/glad.h>
+
+namespace Donut
+{
+    void OpenGLRendererAPI::init()
+    {
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        glEnable(GL_DEPTH_TEST);
+    }
+
+    void OpenGLRendererAPI::set_viewport(uint32_t x, uint32_t y, uint32_t width, uint32_t height)
+    {
+        glViewport(x, y, width, height);
+    }
+
+    void OpenGLRendererAPI::set_clear_color(const glm::vec4& color)
+    {
+        glClearColor(color.r, color.g, color.b, color.a);
+    }
+
+    void OpenGLRendererAPI::clear()
+    {
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    }
+
+    void OpenGLRendererAPI::draw_indexed(const std::shared_ptr<VertexArray>& vertex_array, uint32_t index_count)
+    {
+        uint32_t count = index_count ? index_count : vertex_array->get_index_buffer()->get_count();
+        glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, nullptr);
+        glBindTexture(GL_TEXTURE_2D, 0);
+    }
+};
-- 
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