From 21eb3e11e0d4d42d23de6c27a5cdf83d36ac0774 Mon Sep 17 00:00:00 2001
From: Hamed Zaghaghi <hamed.zaghaghi@gmail.com>
Date: Mon, 22 Oct 2007 20:24:26 +0000
Subject: 2d-Filters feature and actuators.

---
 .../gameengine/Rasterizer/RAS_2DFilterManager.cpp  | 285 +++++++++++++++++++++
 source/gameengine/Rasterizer/RAS_2DFilterManager.h |  59 +++++
 source/gameengine/Rasterizer/RAS_IRenderTools.h    |  16 +-
 .../RAS_OpenGLFilters/RAS_Blur2DFilter.h           |  24 ++
 .../RAS_OpenGLFilters/RAS_Dilation2DFilter.h       |  24 ++
 .../RAS_OpenGLFilters/RAS_Erosion2DFilter.h        |  23 ++
 .../RAS_OpenGLFilters/RAS_GrayScale2DFilter.h      |  14 +
 .../RAS_OpenGLFilters/RAS_Invert2DFilter.h         |  15 ++
 .../RAS_OpenGLFilters/RAS_Laplacian2DFilter.h      |  26 ++
 .../RAS_OpenGLFilters/RAS_Prewitt2DFilter.h        |  31 +++
 .../RAS_OpenGLFilters/RAS_Sepia2DFilter.h          |  15 ++
 .../RAS_OpenGLFilters/RAS_Sharpen2DFilter.h        |  25 ++
 .../RAS_OpenGLFilters/RAS_Sobel2DFilter.h          |  30 +++
 13 files changed, 585 insertions(+), 2 deletions(-)
 create mode 100644 source/gameengine/Rasterizer/RAS_2DFilterManager.cpp
 create mode 100644 source/gameengine/Rasterizer/RAS_2DFilterManager.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h
 create mode 100644 source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h

(limited to 'source/gameengine/Rasterizer')

diff --git a/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp b/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp
new file mode 100644
index 00000000000..740a4d7a6b3
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp
@@ -0,0 +1,285 @@
+
+#define STRINGIFY(A)  #A
+
+#include "RAS_OpenGLFilters/RAS_Blur2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Sharpen2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Dilation2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Erosion2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Laplacian2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Sobel2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Prewitt2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_GrayScale2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Sepia2DFilter.h"
+#include "RAS_OpenGLFilters/RAS_Invert2DFilter.h"
+
+#include "RAS_ICanvas.h"
+#include "RAS_2DFilterManager.h"
+#include <iostream>
+
+#ifdef WIN32
+// OpenGL gl.h needs 'windows.h' on windows platforms 
+#include <windows.h>
+#endif //WIN32
+#ifdef __APPLE__
+#define GL_GLEXT_LEGACY 1
+#include <OpenGL/gl.h>
+#else
+#include <GL/gl.h>
+#endif
+
+#include "RAS_OpenGLRasterizer/RAS_GLExtensionManager.h"
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+
+RAS_2DFilterManager::RAS_2DFilterManager():
+texturewidth(-1), textureheight(-1),
+canvaswidth(-1), canvasheight(-1),
+numberoffilters(0),texname(-1)
+{
+	isshadersupported = bgl::QueryVersion(2,0);
+	if(!isshadersupported)
+	{
+		std::cout<<"shaders not supported!" << std::endl;
+		return;
+	}
+
+	int passindex;
+	for(passindex =0; passindex<MAX_RENDER_PASS; passindex++)
+		m_filters[passindex] = 0;
+
+	int programindex;
+	for(programindex=0; programindex<RAS_2DFILTER_NUMBER_OF_FILTERS; programindex++)
+		m_programs[programindex] = 0;
+	
+}
+
+RAS_2DFilterManager::~RAS_2DFilterManager()
+{
+}
+
+unsigned int RAS_2DFilterManager::CreateShaderProgram(char* shadersource)
+{
+		GLuint program;	
+		GLuint fShader = bgl::blCreateShaderObjectARB(GL_FRAGMENT_SHADER);
+        GLint success;
+
+		bgl::blShaderSourceARB(fShader, 1, (const char**)&shadersource, NULL);
+
+		bgl::blCompileShaderARB(fShader);
+
+		bgl::blGetObjectParameterivARB(fShader, GL_COMPILE_STATUS, &success);
+		if(!success)
+		{
+			/*Shader Comile Error*/
+			std::cout << "2dFilters - Shader compile error" << std::endl;
+			return 0;
+		}
+		    
+		program = bgl::blCreateProgramObjectARB();
+		bgl::blAttachObjectARB(program, fShader);
+
+		bgl::blLinkProgramARB(program);
+		bgl::blGetObjectParameterivARB(program, GL_LINK_STATUS, &success);
+		if (!success)
+		{
+			/*Program Link Error*/
+			std::cout << "2dFilters - Shader program link error" << std::endl;
+			return 0;
+		}
+   		
+		bgl::blValidateProgramARB(program);
+		bgl::blGetObjectParameterivARB(program, GL_VALIDATE_STATUS, &success);
+        if (!success)
+		{
+			/*Program Validation Error*/
+			std::cout << "2dFilters - Shader program validation error" << std::endl;
+			return 0;
+		}
+		return program;
+}
+
+unsigned int RAS_2DFilterManager::CreateShaderProgram(int filtermode)
+{
+		switch(filtermode)
+		{
+			case RAS_2DFILTER_BLUR:
+				return CreateShaderProgram(BlurFragmentShader);
+			case RAS_2DFILTER_SHARPEN:
+				return CreateShaderProgram(SharpenFragmentShader);
+			case RAS_2DFILTER_DILATION:
+				return CreateShaderProgram(DilationFragmentShader);
+			case RAS_2DFILTER_EROSION:
+				return CreateShaderProgram(ErosionFragmentShader);
+			case RAS_2DFILTER_LAPLACIAN:
+				return CreateShaderProgram(LaplacionFragmentShader);
+			case RAS_2DFILTER_SOBEL:
+				return CreateShaderProgram(SobelFragmentShader);
+			case RAS_2DFILTER_PREWITT:
+				return CreateShaderProgram(PrewittFragmentShader);
+			case RAS_2DFILTER_GRAYSCALE:
+				return CreateShaderProgram(GrayScaleFragmentShader);
+			case RAS_2DFILTER_SEPIA:
+				return CreateShaderProgram(SepiaFragmentShader);
+			case RAS_2DFILTER_INVERT:
+				return CreateShaderProgram(InvertFragmentShader);
+		}
+		return 0;
+}
+
+void RAS_2DFilterManager::StartShaderProgram(int filtermode)
+{
+    GLint uniformLoc;
+	bgl::blUseProgramObjectARB(m_programs[filtermode]);
+	uniformLoc = bgl::blGetUniformLocationARB(m_programs[filtermode], "sampler0");
+    if (uniformLoc != -1)
+    {
+		bgl::blUniform1iARB(uniformLoc, 0);
+    }
+	uniformLoc = bgl::blGetUniformLocationARB(m_programs[filtermode], "tc_offset");
+    if (uniformLoc != -1)
+    {
+        bgl::blUniform2fvARB(uniformLoc, 9, textureoffsets);
+    }
+}
+
+void RAS_2DFilterManager::EndShaderProgram()
+{
+	bgl::blUseProgramObjectARB(0);
+}
+
+void RAS_2DFilterManager::SetupTexture()
+{
+	if(texname!=-1)
+	{
+		glDeleteTextures(1,&texname);
+	}
+	glGenTextures(1, &texname);
+	glBindTexture(GL_TEXTURE_2D, texname);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texturewidth, textureheight, 0, GL_RGB,
+		GL_UNSIGNED_BYTE, 0);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+}
+
+void RAS_2DFilterManager::UpdateOffsetMatrix(int width, int height)
+{
+	canvaswidth = texturewidth = width;
+	canvasheight = textureheight = height;
+
+	GLint i,j;
+	i = 0;
+    while ((1 << i) <= texturewidth)
+        i++;
+    texturewidth = (1 << (i));
+
+    // Now for height
+    i = 0;
+    while ((1 << i) <= textureheight)
+        i++;
+    textureheight = (1 << (i));
+
+	GLfloat	xInc = 1.0f / (GLfloat)texturewidth;
+	GLfloat yInc = 1.0f / (GLfloat)textureheight;
+	
+	for (i = 0; i < 3; i++)
+	{
+		for (j = 0; j < 3; j++)
+		{
+			textureoffsets[(((i*3)+j)*2)+0] = (-1.0f * xInc) + ((GLfloat)i * xInc);
+			textureoffsets[(((i*3)+j)*2)+1] = (-1.0f * yInc) + ((GLfloat)j * yInc);
+		}
+	}
+
+	SetupTexture();
+}
+
+void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
+{
+	if(numberoffilters<=0 || !isshadersupported)
+		return;
+
+	if(canvaswidth != canvas->GetWidth() || canvasheight != canvas->GetHeight())
+	{
+		UpdateOffsetMatrix(canvas->GetWidth(), canvas->GetHeight());
+	}
+	GLuint	viewport[4]={0};
+
+	int passindex;
+	bool first = true;
+	for(passindex =0; passindex<MAX_RENDER_PASS; passindex++)
+	{
+		if(m_filters[passindex])
+		{
+			if(first)
+			{
+				glGetIntegerv(GL_VIEWPORT,(int*)viewport);
+				glViewport(0, 0, texturewidth, textureheight);
+
+				glDisable(GL_DEPTH_TEST);
+				glMatrixMode(GL_PROJECTION);
+				glLoadIdentity();
+				glMatrixMode(GL_MODELVIEW);
+				glLoadIdentity();
+				first = false;
+			}
+			
+			StartShaderProgram(m_filters[passindex]);
+
+			glBindTexture(GL_TEXTURE_2D, texname);
+			glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 0, 0, texturewidth, textureheight, 0);
+
+			glClear(GL_COLOR_BUFFER_BIT);
+
+			glBegin(GL_QUADS);
+				glColor4f(1.f, 1.f, 1.f, 1.f);
+				glTexCoord2f(1.0, 1.0);	glVertex2f(1,1);
+				glTexCoord2f(0.0, 1.0);	glVertex2f(-1,1);
+				glTexCoord2f(0.0, 0.0);	glVertex2f(-1,-1);
+				glTexCoord2f(1.0, 0.0);	glVertex2f(1,-1);
+			glEnd();
+		}
+	}
+
+	if(!first)
+	{
+		glEnable(GL_DEPTH_TEST);
+		glViewport(viewport[0],viewport[1],viewport[2],viewport[3]);
+		EndShaderProgram();	
+	}
+}
+
+void RAS_2DFilterManager::EnableFilter(RAS_2DFILTER_MODE mode, int pass)
+{
+	if(!isshadersupported)
+		return;
+	if( pass == -1)
+	{
+		if(m_programs[mode] == 0)
+		m_programs[mode] = CreateShaderProgram(mode);
+	}
+	else if( pass < MAX_RENDER_PASS )
+	{
+		if(mode == RAS_2DFILTER_NOFILTER )
+		{
+			if(m_filters[pass] != 0)
+				numberoffilters--;
+			m_filters[pass] = 0;
+		}
+		else
+		{
+			if(!m_programs[mode])
+				m_programs[mode] = CreateShaderProgram(mode);
+			if(m_programs[mode])
+			{
+				if(m_filters[pass] == 0)
+					numberoffilters++;
+				m_filters[pass] = mode;
+			}
+		}
+	}
+}
diff --git a/source/gameengine/Rasterizer/RAS_2DFilterManager.h b/source/gameengine/Rasterizer/RAS_2DFilterManager.h
new file mode 100644
index 00000000000..e2d9dce170e
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_2DFilterManager.h
@@ -0,0 +1,59 @@
+#ifndef __RAS_I2DFILTER
+#define __RAS_I2DFILTER
+
+
+
+#define MAX_RENDER_PASS	100
+
+class RAS_2DFilterManager
+{
+private:
+	unsigned int	CreateShaderProgram(char* shadersource);
+	unsigned int	CreateShaderProgram(int filtermode);
+	void			StartShaderProgram(int filtermode);
+	void			EndShaderProgram();
+
+	float			textureoffsets[18];
+	float			view[4];
+	unsigned int	texname;
+	int				texturewidth;
+	int				textureheight;
+	int				canvaswidth;
+	int				canvasheight;
+	int				numberoffilters;
+
+	bool			isshadersupported;
+public:
+	enum RAS_2DFILTER_MODE {
+		RAS_2DFILTER_NOFILTER = 0,
+		RAS_2DFILTER_MOTIONBLUR,
+		RAS_2DFILTER_BLUR,
+		RAS_2DFILTER_SHARPEN,
+		RAS_2DFILTER_DILATION,
+		RAS_2DFILTER_EROSION,
+		RAS_2DFILTER_LAPLACIAN,
+		RAS_2DFILTER_SOBEL,
+		RAS_2DFILTER_PREWITT,
+		RAS_2DFILTER_GRAYSCALE,
+		RAS_2DFILTER_SEPIA,
+		RAS_2DFILTER_INVERT,
+		RAS_2DFILTER_NUMBER_OF_FILTERS
+	};
+
+	int	m_filters[MAX_RENDER_PASS];
+
+	unsigned int m_programs[RAS_2DFILTER_NUMBER_OF_FILTERS];
+	
+	RAS_2DFilterManager();
+
+	~RAS_2DFilterManager();
+
+	void SetupTexture();
+
+	void UpdateOffsetMatrix(int width, int height);
+
+	void RenderFilters(RAS_ICanvas* canvas);
+
+	void EnableFilter(RAS_2DFILTER_MODE mode, int pass);
+};
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_IRenderTools.h b/source/gameengine/Rasterizer/RAS_IRenderTools.h
index 114783b9a47..e7cb1c9176f 100644
--- a/source/gameengine/Rasterizer/RAS_IRenderTools.h
+++ b/source/gameengine/Rasterizer/RAS_IRenderTools.h
@@ -34,6 +34,7 @@
 
 #include "MT_Transform.h"
 #include "RAS_IRasterizer.h"
+#include "RAS_2DFilterManager.h"
 
 #include <vector>
 #include <algorithm>
@@ -41,6 +42,7 @@
 class		RAS_IPolyMaterial;
 struct		RAS_LightObject;
 
+
 class RAS_IRenderTools
 {
 
@@ -52,7 +54,8 @@ protected:
 	bool	m_modified;
 	
 	std::vector<struct	RAS_LightObject*> m_lights;
-
+	
+	RAS_2DFilterManager m_filtermanager;
 
 public:
 	enum RAS_TEXT_RENDER_MODE {
@@ -61,7 +64,7 @@ public:
 		RAS_TEXT_PADDED,
 		RAS_TEXT_MAX
 	};
-	
+
 	RAS_IRenderTools(
 	) :
 		m_clientobject(NULL),
@@ -178,6 +181,14 @@ public:
 		void
 	MotionBlur(RAS_IRasterizer* rasterizer)=0;
 
+	virtual
+		void
+		Update2DFilter(RAS_2DFilterManager::RAS_2DFILTER_MODE filtermode, int pass)=0;
+
+	virtual
+		void
+		Render2DFilters(RAS_ICanvas* canvas)=0;
+
 	virtual 
 		class RAS_IPolyMaterial*	
 	CreateBlenderPolyMaterial(
@@ -200,3 +211,4 @@ public:
 #endif //__RAS_IRENDERTOOLS
 
 
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h
new file mode 100644
index 00000000000..ae7f56174e6
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h
@@ -0,0 +1,24 @@
+#ifndef __RAS_BLUR2DFILTER
+#define __RAS_BLUR2DFILTER
+
+char * BlurFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+    }
+
+    gl_FragColor = (sample[0] + (2.0*sample[1]) + sample[2] + 
+                    (2.0*sample[3]) + sample[4] + (2.0*sample[5]) + 
+                    sample[6] + (2.0*sample[7]) + sample[8]) / 13.0;
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h
new file mode 100644
index 00000000000..6fd7f867d10
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h
@@ -0,0 +1,24 @@
+#ifndef __RAS_DILATION2DFILTER
+#define __RAS_DILATION2DFILTER
+
+char * DilationFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+    vec4 maxValue = vec4(0.0);
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+        maxValue = max(sample[i], maxValue);
+    }
+
+    gl_FragColor = maxValue;
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h
new file mode 100644
index 00000000000..a0fc7486447
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h
@@ -0,0 +1,23 @@
+#ifndef __RAS_EROSION2DFILTER
+#define __RAS_EROSION2DFILTER
+
+char * ErosionFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+    vec4 minValue = vec4(1.0);
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+        minValue = min(sample[i], minValue);
+    }
+
+    gl_FragColor = minValue;
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h
new file mode 100644
index 00000000000..c6fc4a0214d
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h
@@ -0,0 +1,14 @@
+#ifndef __RAS_GRAYSCALE2DFILTER
+#define __RAS_GRAYSCALE2DFILTER
+
+char * GrayScaleFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+
+void main(void)
+{
+	vec4 texcolor = texture2D(sampler0, gl_TexCoord[0].st); 
+	float gray = dot(texcolor.rgb, vec3(0.299, 0.587, 0.114));
+    gl_FragColor = vec4(gray, gray, gray, texcolor.a);
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h
new file mode 100644
index 00000000000..34e6fe29cd3
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h
@@ -0,0 +1,15 @@
+#ifndef __RAS_INVERT2DFILTER
+#define __RAS_INVERT2DFILTER
+
+char * InvertFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 offset[9];
+
+void main(void)
+{
+	vec4 texcolor = texture2D(sampler0, gl_TexCoord[0].st); 
+	gl_FragColor.rgb = 1.0 - texcolor.rgb;
+    gl_FragColor.a = texcolor.a;
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h
new file mode 100644
index 00000000000..f5b44a69c13
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h
@@ -0,0 +1,26 @@
+#ifndef __RAS_LAPLACION2DFILTER
+#define __RAS_LAPLACION2DFILTER
+
+char * LaplacionFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+    }
+
+    gl_FragColor = (sample[4] * 8.0) - 
+                    (sample[0] + sample[1] + sample[2] + 
+                     sample[3] + sample[5] + 
+                     sample[6] + sample[7] + sample[8]);
+	gl_FragColor = vec4(gl_FragColor.rgb, 1.0);
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h
new file mode 100644
index 00000000000..a6897bd33d4
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h
@@ -0,0 +1,31 @@
+#ifndef __RAS_PREWITT2DFILTER
+#define __RAS_PREWITT2DFILTER
+
+char * PrewittFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+    }
+
+    vec4 horizEdge = sample[2] + sample[5] + sample[8] -
+                     (sample[0] + sample[3] + sample[6]);
+
+    vec4 vertEdge = sample[0] + sample[1] + sample[2] -
+                    (sample[6] + sample[7] + sample[8]);
+
+    gl_FragColor.rgb = sqrt((horizEdge.rgb * horizEdge.rgb) + 
+                            (vertEdge.rgb * vertEdge.rgb));
+    gl_FragColor.a = 1.0;
+}
+
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h
new file mode 100644
index 00000000000..cfff00e1287
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h
@@ -0,0 +1,15 @@
+#ifndef __RAS_SEPIA2DFILTER
+#define __RAS_SEPIA2DFILTER
+
+char * SepiaFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 offset[9];
+
+void main(void)
+{
+	vec4 texcolor = texture2D(sampler0, gl_TexCoord[0].st); 
+	float gray = dot(texcolor.rgb, vec3(0.299, 0.587, 0.114));
+	gl_FragColor = vec4(gray * vec3(1.2, 1.0, 0.8), texcolor.a);
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h
new file mode 100644
index 00000000000..640983482a9
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h
@@ -0,0 +1,25 @@
+#ifndef __RAS_SHARPEN2DFILTER
+#define __RAS_SHARPEN2DFILTER
+
+char * SharpenFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+    }
+
+    gl_FragColor = (sample[4] * 9.0) - 
+                    (sample[0] + sample[1] + sample[2] + 
+                     sample[3] + sample[5] + 
+                     sample[6] + sample[7] + sample[8]);
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h
new file mode 100644
index 00000000000..da1d34713c9
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h
@@ -0,0 +1,30 @@
+#ifndef __RAS_SOBEL2DFILTER
+#define __RAS_SOBEL2DFILTER
+
+char * SobelFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[i]);
+    }
+
+    vec4 horizEdge = sample[2] + (2.0*sample[5]) + sample[8] -
+                     (sample[0] + (2.0*sample[3]) + sample[6]);
+
+    vec4 vertEdge = sample[0] + (2.0*sample[1]) + sample[2] -
+                    (sample[6] + (2.0*sample[7]) + sample[8]);
+
+    gl_FragColor.rgb = sqrt((horizEdge.rgb * horizEdge.rgb) + 
+                            (vertEdge.rgb * vertEdge.rgb));
+    gl_FragColor.a = 1.0;
+}
+);
+#endif
+
-- 
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