From ec5b0e17ff735e58de139b7f8ce0598928958bcc Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Wed, 4 Jun 2014 17:55:58 +0300
Subject: Add buffers related OpenGL functions.

---
 src/graphicsmanager.cpp | 10 ++++++++--
 src/render/mgl.cpp      |  4 ++++
 src/render/mgl.h        |  9 +++++++++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/graphicsmanager.cpp b/src/graphicsmanager.cpp
index 324337871..f7c877c1f 100644
--- a/src/graphicsmanager.cpp
+++ b/src/graphicsmanager.cpp
@@ -884,8 +884,7 @@ void GraphicsManager::initOpenGLFunctions()
         if (!mglPopGroupMarker)
             assignFunction(glPopGroupMarker, "glPopGroupMarker");
     }
-
-    if (checkGLVersion(3, 0) || supportExtension("GL_ARB_vertex_array_object"))
+    if (checkGLVersion(2, 1) && supportExtension("GL_ARB_vertex_array_object"))
     {
         assignFunction(glGenVertexArrays, "glGenVertexArrays");
         assignFunction(glBindVertexArray, "glBindVertexArray");
@@ -895,6 +894,13 @@ void GraphicsManager::initOpenGLFunctions()
         assignFunction(glDisableVertexAttribArray,
             "glDisableVertexAttribArray");
     }
+    if (checkGLVersion(1, 5))
+    {
+        assignFunction(glGenBuffers, "glGenBuffers");
+        assignFunction(glDeleteBuffers, "glDeleteBuffers");
+        assignFunction(glBindBuffer, "glBindBuffer");
+        assignFunction(glBufferData, "glBufferData");
+    }
 
 #ifdef WIN32
     assignFunction(wglGetExtensionsString, "wglGetExtensionsStringARB");
diff --git a/src/render/mgl.cpp b/src/render/mgl.cpp
index efa2f736a..fc6624606 100644
--- a/src/render/mgl.cpp
+++ b/src/render/mgl.cpp
@@ -54,6 +54,10 @@ defName(glDeleteVertexArrays);
 defName(glVertexAttribPointer);
 defName(glEnableVertexAttribArray);
 defName(glDisableVertexAttribArray);
+defName(glGenBuffers);
+defName(glDeleteBuffers);
+defName(glBindBuffer);
+defName(glBufferData);
 
 #ifdef WIN32
 defName(wglGetExtensionsString);
diff --git a/src/render/mgl.h b/src/render/mgl.h
index b762eed94..1bc82989b 100644
--- a/src/render/mgl.h
+++ b/src/render/mgl.h
@@ -125,6 +125,11 @@ typedef void (APIENTRY *glVertexAttribPointer_t) (GLuint index, GLint size,
     GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
 typedef void (APIENTRY *glEnableVertexAttribArray_t) (GLuint index);
 typedef void (APIENTRY *glDisableVertexAttribArray_t) (GLuint index);
+typedef void (APIENTRY *glGenBuffers_t) (GLsizei n, GLuint *buffers);
+typedef void (APIENTRY *glDeleteBuffers_t) (GLsizei n, GLuint *buffers);
+typedef void (APIENTRY *glBindBuffer_t) (GLenum target, GLuint buffer);
+typedef void (APIENTRY *glBufferData_t) (GLenum target, GLsizeiptr size,
+    const GLvoid *data, GLenum usage);
 
 // callback
 typedef void (APIENTRY *GLDEBUGPROC_t) (GLenum source, GLenum type, GLuint id,
@@ -161,6 +166,10 @@ defNameE(glDeleteVertexArrays);
 defNameE(glVertexAttribPointer);
 defNameE(glEnableVertexAttribArray);
 defNameE(glDisableVertexAttribArray);
+defNameE(glGenBuffers);
+defNameE(glDeleteBuffers);
+defNameE(glBindBuffer);
+defNameE(glBufferData);
 
 #ifdef WIN32
 typedef const char* (APIENTRY * wglGetExtensionsString_t) (HDC hdc);
-- 
cgit v1.2.3-70-g09d2