From 72607666a8d2f14808d55d7053274283e1320cf6 Mon Sep 17 00:00:00 2001
From: cinnaboot <cinnaboot@protonmail.com>
Date: Sat, 29 Jan 2022 09:05:53 -0500
Subject: [PATCH] add getFreeUBO helper function

---
 src/shader.cpp | 10 ++++++++++
 src/shader.h   |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/src/shader.cpp b/src/shader.cpp
index 32ecaa4..026c17e 100644
--- a/src/shader.cpp
+++ b/src/shader.cpp
@@ -159,6 +159,16 @@ getShaderByID(GLContext* gl_ctx, GLuint prog_id)
 	return nullptr;
 }
 
+GLBuffer*
+getFreeUBO(GLContext* gl_ctx)
+{
+	if (gl_ctx->num_ubos < gl_ctx->max_ubos)
+		return  &gl_ctx->uniform_buffers[gl_ctx->num_ubos++];
+
+	LOGF(Error, "no free Uniform Buffer Objects\n");
+	return nullptr;
+}
+
 GLTexture*
 getGLTexture(GLContext* gl_ctx, Texture* diffuse_img)
 {
diff --git a/src/shader.h b/src/shader.h
index 1c6f42f..63bcaae 100644
--- a/src/shader.h
+++ b/src/shader.h
@@ -186,6 +186,8 @@ ShaderProgram* getShaderByHash(GLContext* gl_ctx, u64 hash);
 
 ShaderProgram* getFreeShader(GLContext* gl_ctx);
 
+GLBuffer* getFreeUBO(GLContext* gl_ctx);
+
 GLTexture* getGLTexture(GLContext* gl_ctx, Texture* diffuse_img);
 
 void renderVAO(GLMesh* glmesh,