BGE Bug Fix:#17349, fixes some problems about 2d-filters

source/gameengine/BlenderRoutines/KX_BlenderCanvas.cpp

@@ -101,6 +101,13 @@ int KX_BlenderCanvas::GetHeight(
 	return scrarea_get_win_height(m_area);
 }
 
+RAS_Rect &
+KX_BlenderCanvas::
+GetWindowArea(
+){
+	return m_area_rect;
+}	
+
 	void
 KX_BlenderCanvas::
 SetViewPort(
@@ -112,6 +119,11 @@ SetViewPort(
 	int minx = scrarea_get_win_x(m_area);
 	int miny = scrarea_get_win_y(m_area);
 
+	m_area_rect.SetLeft(minx + x1);
+	m_area_rect.SetBottom(miny + y1);
+	m_area_rect.SetRight(minx + x2);
+	m_area_rect.SetTop(miny + y2);
+
 	glViewport(minx + x1, miny + y1, vp_width, vp_height);
 	glScissor(minx + x1, miny + y1, vp_width, vp_height);
 }

source/gameengine/BlenderRoutines/KX_BlenderCanvas.h

@@ -117,6 +117,10 @@ public:
 		return m_displayarea;
 	};
 
+		RAS_Rect &
+	GetWindowArea(
+	);
+
 		void
 	SetViewPort(
 		int x1, int y1,
@@ -159,6 +163,7 @@ public:
 private:
 	/** Blender area the game engine is running within */
 	struct ScrArea* m_area;
+	RAS_Rect 	m_area_rect;
 };
 
 #endif // __KX_BLENDERCANVAS

source/gameengine/GamePlayer/common/GPC_Canvas.h

@@ -131,6 +131,12 @@ public:
 		return m_displayarea;
 	};
 	
+		RAS_Rect &
+	GetWindowArea(
+	) {
+		return m_displayarea;
+	}
+
 		void 
 	BeginFrame(
 	) {};

source/gameengine/Rasterizer/RAS_2DFilterManager.cpp

@@ -43,6 +43,7 @@
 
 #include "STR_String.h"
 #include "RAS_ICanvas.h"
+#include "RAS_Rect.h"
 #include "RAS_2DFilterManager.h"
 #include <iostream>
 
@@ -293,10 +294,13 @@ void RAS_2DFilterManager::SetupTextures(bool depth, bool luminance)
 	}
 }
 
-void RAS_2DFilterManager::UpdateOffsetMatrix(int width, int height)
+void RAS_2DFilterManager::UpdateOffsetMatrix(RAS_ICanvas* canvas)
 {
-	canvaswidth = texturewidth = width;
+	RAS_Rect canvas_rect = canvas->GetWindowArea();
-	canvasheight = textureheight = height;
+	canvaswidth = canvas->GetWidth();
+	canvasheight = canvas->GetHeight();
+	texturewidth = canvaswidth + canvas_rect.GetLeft();
+	textureheight = canvasheight + canvas_rect.GetBottom();
 
 	GLint i,j;
 	i = 0;
@@ -352,7 +356,7 @@ void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
 
 	if(canvaswidth != canvas->GetWidth() || canvasheight != canvas->GetHeight())
 	{
-		UpdateOffsetMatrix(canvas->GetWidth(), canvas->GetHeight());
+		UpdateOffsetMatrix(canvas);
 		SetupTextures(need_depth, need_luminance);
 	}
 	GLuint	viewport[4]={0};
@@ -373,6 +377,8 @@ void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
 	glViewport(0,0, texturewidth, textureheight);
 
 	glDisable(GL_DEPTH_TEST);
+	glMatrixMode(GL_TEXTURE);
+	glLoadIdentity();
 	glMatrixMode(GL_PROJECTION);
 	glLoadIdentity();
 	glMatrixMode(GL_MODELVIEW);

source/gameengine/Rasterizer/RAS_2DFilterManager.h

@@ -42,7 +42,7 @@ private:
 	void SetupTextures(bool depth, bool luminance);
 	void FreeTextures();
 
-	void UpdateOffsetMatrix(int width, int height);
+	void UpdateOffsetMatrix(RAS_ICanvas* canvas);
 
 	float			textureoffsets[18];
 	float			view[4];

source/gameengine/Rasterizer/RAS_ICanvas.h

@@ -136,6 +136,14 @@ public:
 	GetDisplayArea(
 	) = 0;
 
+	/**
+	 * Used to get canvas area within blender.
+	 */
+	virtual
+		RAS_Rect &
+	GetWindowArea(
+	) = 0;
+
 	/**
 	 * Set the visible vieport 
 	 */