From 17f8465e4358d43accfb0b486b87c18e7dedd83b Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Thu, 19 Jun 2014 17:15:34 +0300
Subject: Add functions from OpenGL extension GL_ARB_copy_image.

---
 src/graphicsmanager.cpp | 8 ++++++++
 src/render/mgl.cpp      | 1 +
 src/render/mgl.h        | 1 +
 src/render/mgltypes.h   | 6 ++++++
 4 files changed, 16 insertions(+)

diff --git a/src/graphicsmanager.cpp b/src/graphicsmanager.cpp
index d1dd65f30..3609f1e85 100644
--- a/src/graphicsmanager.cpp
+++ b/src/graphicsmanager.cpp
@@ -1004,6 +1004,14 @@ void GraphicsManager::initOpenGLFunctions()
         mSupportModernOpengl = false;
         logger->log1("buffers extension not found");
     }
+    if (supportExtension("GL_ARB_copy_image"))
+    {
+        assignFunction(glCopyImageSubData, "glCopyImageSubData");
+    }
+    else
+    {
+        logger->log1("GL_ARB_copy_image not found");
+    }
     if (supportExtension("GL_ARB_shader_objects"))
     {
         assignFunction(glCreateShader, "glCreateShader");
diff --git a/src/render/mgl.cpp b/src/render/mgl.cpp
index 9818b7f04..336a5f71b 100644
--- a/src/render/mgl.cpp
+++ b/src/render/mgl.cpp
@@ -96,6 +96,7 @@ defName(glIsBuffer);
 defName(glVertexAttribIFormat);
 defName(glVertexAttribIPointer);
 defName(glInvalidateTexImage);
+defName(glCopyImageSubData);
 
 #ifdef WIN32
 defName(wglGetExtensionsString);
diff --git a/src/render/mgl.h b/src/render/mgl.h
index dbd9a4b38..9cb6ca72f 100644
--- a/src/render/mgl.h
+++ b/src/render/mgl.h
@@ -99,6 +99,7 @@ defNameE(glIsBuffer);
 defNameE(glVertexAttribIFormat);
 defNameE(glVertexAttribIPointer);
 defNameE(glInvalidateTexImage);
+defNameE(glCopyImageSubData);
 
 #ifdef WIN32
 defNameE(wglGetExtensionsString);
diff --git a/src/render/mgltypes.h b/src/render/mgltypes.h
index 14b3b5760..133489d4e 100644
--- a/src/render/mgltypes.h
+++ b/src/render/mgltypes.h
@@ -145,6 +145,12 @@ typedef void (APIENTRY *glVertexAttribIFormat_t) (GLuint attribindex,
 typedef void (APIENTRY *glVertexAttribIPointer_t) (GLuint index, GLint size,
     GLenum type, GLsizei stride, const GLvoid * pointer);
 typedef void (APIENTRY *glInvalidateTexImage_t) (GLuint texture, GLint level);
+typedef void (APIENTRY *glCopyImageSubData_t) (GLuint srcName,
+    GLenum srcTarget, GLint srcLevel,
+    GLint srcX, GLint srcY, GLint srcZ,
+    GLuint dstName, GLenum dstTarget, GLint dstLevel,
+    GLint dstX, GLint dstY, GLint dstZ,
+    GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth);
 
 // callback
 typedef void (APIENTRY *GLDEBUGPROC_t) (GLenum source, GLenum type, GLuint id,
-- 
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