8 files changed, 48 insertions, 5 deletions
diff --git a/source/gameengine/BlenderRoutines/KX_BlenderCanvas.cpp b/source/gameengine/BlenderRoutines/KX_BlenderCanvas.cpp
index 346d2017ef0..719041e8d41 100644
--- a/source/gameengine/BlenderRoutines/KX_BlenderCanvas.cpp
+++ b/source/gameengine/BlenderRoutines/KX_BlenderCanvas.cpp
@@ -178,6 +178,18 @@ SetViewPort(
 	glScissor(minx + x1, miny + y1, vp_width, vp_height);
 }
 
+	void
+KX_BlenderCanvas::
+UpdateViewPort(
+	int x1, int y1,
+	int x2, int y2
+) {
+	m_viewport[0] = x1;
+	m_viewport[1] = y1;
+	m_viewport[2] = x2;
+	m_viewport[3] = y2;
+}
+
 	const int*
 KX_BlenderCanvas::
 GetViewPort() {
diff --git a/source/gameengine/BlenderRoutines/KX_BlenderCanvas.h b/source/gameengine/BlenderRoutines/KX_BlenderCanvas.h
index 244394a115d..4117c13aede 100644
--- a/source/gameengine/BlenderRoutines/KX_BlenderCanvas.h
+++ b/source/gameengine/BlenderRoutines/KX_BlenderCanvas.h
@@ -151,6 +151,13 @@ public:
 		int x1, int y1,
 		int x2, int y2
 	);
+
+		void
+	UpdateViewPort(
+		int x1, int y1,
+		int x2, int y2
+	);
+
 		const int*
 	GetViewPort();
 
diff --git a/source/gameengine/GamePlayer/common/GPC_Canvas.cpp b/source/gameengine/GamePlayer/common/GPC_Canvas.cpp
index b5c1c29238a..058454ca352 100644
--- a/source/gameengine/GamePlayer/common/GPC_Canvas.cpp
+++ b/source/gameengine/GamePlayer/common/GPC_Canvas.cpp
@@ -131,7 +131,15 @@ void GPC_Canvas::SetViewPort(int x1, int y1, int x2, int y2)
 
 	glViewport(x1,y1,x2-x1 + 1,y2-y1 + 1);
 	glScissor(x1,y1,x2-x1 + 1,y2-y1 + 1);
-};
+}
+
+void GPC_Canvas::UpdateViewPort(int x1, int y1, int x2, int y2)
+{
+	m_viewport[0] = x1;
+	m_viewport[1] = y1;
+	m_viewport[2] = x2;
+	m_viewport[3] = y2;
+}
 
 const int *GPC_Canvas::GetViewPort()
 {
diff --git a/source/gameengine/GamePlayer/common/GPC_Canvas.h b/source/gameengine/GamePlayer/common/GPC_Canvas.h
index ec5375c0e13..00c5911a8b4 100644
--- a/source/gameengine/GamePlayer/common/GPC_Canvas.h
+++ b/source/gameengine/GamePlayer/common/GPC_Canvas.h
@@ -155,6 +155,7 @@ public:
 	);
 	
 	void SetViewPort(int x1, int y1, int x2, int y2);
+	void UpdateViewPort(int x1, int y1, int x2, int y2);
 	const int *GetViewPort();
 
 	void ClearColor(float r, float g, float b, float a);
diff --git a/source/gameengine/Ketsji/KX_KetsjiEngine.cpp b/source/gameengine/Ketsji/KX_KetsjiEngine.cpp
index 6638b711a1b..f0d5d5c6685 100644
--- a/source/gameengine/Ketsji/KX_KetsjiEngine.cpp
+++ b/source/gameengine/Ketsji/KX_KetsjiEngine.cpp
@@ -1167,7 +1167,7 @@ void KX_KetsjiEngine::RenderShadowBuffers(KX_Scene *scene)
 			m_rasterizer->SetDrawingMode(RAS_IRasterizer::KX_SHADOW);
 
 			/* binds framebuffer object, sets up camera .. */
-			light->BindShadowBuffer(m_rasterizer, cam, camtrans);
+			light->BindShadowBuffer(m_rasterizer, m_canvas, cam, camtrans);
 
 			/* update scene */
 			scene->CalculateVisibleMeshes(m_rasterizer, cam, light->GetShadowLayer());
diff --git a/source/gameengine/Ketsji/KX_Light.cpp b/source/gameengine/Ketsji/KX_Light.cpp
index cf58d18838a..5414a4df0f8 100644
--- a/source/gameengine/Ketsji/KX_Light.cpp
+++ b/source/gameengine/Ketsji/KX_Light.cpp
@@ -236,7 +236,7 @@ int KX_LightObject::GetShadowLayer()
 		return 0;
 }
 
-void KX_LightObject::BindShadowBuffer(RAS_IRasterizer *ras, KX_Camera *cam, MT_Transform& camtrans)
+void KX_LightObject::BindShadowBuffer(RAS_IRasterizer *ras, RAS_ICanvas *canvas, KX_Camera *cam, MT_Transform& camtrans)
 {
 	GPULamp *lamp;
 	float viewmat[4][4], winmat[4][4];
@@ -246,6 +246,9 @@ void KX_LightObject::BindShadowBuffer(RAS_IRasterizer *ras, KX_Camera *cam, MT_T
 	lamp = GetGPULamp();
 	GPU_lamp_shadow_buffer_bind(lamp, viewmat, &winsize, winmat);
 
+	/* GPU_lamp_shadow_buffer_bind() changes the viewport, so update the canvas */
+	canvas->UpdateViewPort(0, 0, winsize, winsize);
+
 	/* setup camera transformation */
 	MT_Matrix4x4 modelviewmat((float*)viewmat);
 	MT_Matrix4x4 projectionmat((float*)winmat);
diff --git a/source/gameengine/Ketsji/KX_Light.h b/source/gameengine/Ketsji/KX_Light.h
index 52f076c772a..f88fc7f6a1b 100644
--- a/source/gameengine/Ketsji/KX_Light.h
+++ b/source/gameengine/Ketsji/KX_Light.h
@@ -64,7 +64,7 @@ public:
 	struct GPULamp *GetGPULamp();
 	bool HasShadowBuffer();
 	int GetShadowLayer();
-	void BindShadowBuffer(class RAS_IRasterizer *ras, class KX_Camera *cam, class MT_Transform& camtrans);
+	void BindShadowBuffer(class RAS_IRasterizer *ras, class RAS_ICanvas *canvas, class KX_Camera *cam, class MT_Transform& camtrans);
 	void UnbindShadowBuffer(class RAS_IRasterizer *ras);
 	struct Image *GetTextureImage(short texslot);
 	void Update();
diff --git a/source/gameengine/Rasterizer/RAS_ICanvas.h b/source/gameengine/Rasterizer/RAS_ICanvas.h
index 60b9f052075..63ad7892aa5 100644
--- a/source/gameengine/Rasterizer/RAS_ICanvas.h
+++ b/source/gameengine/Rasterizer/RAS_ICanvas.h
@@ -178,7 +178,19 @@ public:
 	SetViewPort(
 		int x1, int y1,
 		int x2, int y2
-	) = 0; 
+	) = 0;
+
+	/**
+	 * Update the Canvas' viewport (used when the viewport changes without using SetViewPort()
+	 * eg: Shadow buffers and FBOs
+	 */
+
+	virtual
+		void
+	UpdateViewPort(
+		int x1, int y1,
+		int x2, int y2
+	) = 0;
 
 	/**
 	 * Get the visible viewport