From 06d14967ab1b693c2990e67ce268e16b7bdab60f Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Tue, 24 Feb 2015 14:17:43 +0000
Subject: [PATCH] Intercept queries to glGetBufferPointer that return the map
 pointer

---
 renderdoc/driver/gl/wrappers/gl_get_funcs.cpp | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/renderdoc/driver/gl/wrappers/gl_get_funcs.cpp b/renderdoc/driver/gl/wrappers/gl_get_funcs.cpp
index 9eb762d9c..0279a2444 100644
--- a/renderdoc/driver/gl/wrappers/gl_get_funcs.cpp
+++ b/renderdoc/driver/gl/wrappers/gl_get_funcs.cpp
@@ -383,7 +383,28 @@ void WrappedOpenGL::glGetBufferPointerv(GLenum target, GLenum pname, void **para
 {
 	CoherentMapImplicitBarrier();
 
+	// intercept GL_BUFFER_MAP_POINTER queries
+	if(pname == eGL_BUFFER_MAP_POINTER)
+	{
+		GLResourceRecord *record = GetCtxData().m_BufferRecord[BufferIdx(target)];
+		RDCASSERT(record);
+
+		if(record)
+		{
+			if(record->Map.status == GLResourceRecord::Unmapped)
+				*params = NULL;
+			else
+				*params = (void *)record->Map.ptr;
+		}
+		else
+		{
+			*params = NULL;
+		}
+	}
+	else
+	{
 	m_Real.glGetBufferPointerv(target, pname, params);
+	}
 }
 
 void WrappedOpenGL::glGetBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, void *data)
@@ -996,7 +1017,28 @@ void WrappedOpenGL::glGetNamedBufferPointervEXT(GLuint buffer, GLenum pname, voi
 {
 	CoherentMapImplicitBarrier();
 	
+	// intercept GL_BUFFER_MAP_POINTER queries
+	if(pname == eGL_BUFFER_MAP_POINTER)
+	{
+		GLResourceRecord *record = GetResourceManager()->GetResourceRecord(BufferRes(GetCtx(), buffer));
+		RDCASSERT(record);
+
+		if(record)
+		{
+			if(record->Map.status == GLResourceRecord::Unmapped)
+				*params = NULL;
+			else
+				*params = (void *)record->Map.ptr;
+		}
+		else
+		{
+			*params = NULL;
+		}
+	}
+	else
+	{
 	m_Real.glGetNamedBufferPointervEXT(buffer, pname, params);
+	}
 }
 
 void WrappedOpenGL::glGetNamedProgramivEXT(GLuint program, GLenum target, GLenum pname, GLint *params)