Add files in C++ port

2 files changed, 410 insertions, 0 deletions

diff --git a/src/bicubic.cpp b/src/bicubic.cpp
new file mode 100644
index 0000000..7523738
--- /dev/null
+++ b/src/bicubic.cpp
@@ -0,0 +1,316 @@
+/*
+ *
+ * Compiz bicubic filter plugin
+ *
+ * bicubic.c
+ *
+ * Copyright : (C) 2008 by Dennis Kasprzyk
+ * E-mail    : onestone@opencompositing.org
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "bicubic.h"
+
+COMPIZ_PLUGIN_20090315 (bicubic, BicubicPluginVTable);
+
+int
+BicubicScreen::getBicubicFragmentFunction (GLTexture   *texture,
+					   int         param,
+					   int         unit)
+{
+    GLFragment::FunctionData *data;
+    int		             target;
+    char	             *targetString;
+
+    if (texture->target () == GL_TEXTURE_2D)
+    {
+	target	     = COMP_FETCH_TARGET_2D;
+	targetString = "2D";
+    }
+    else
+    {
+	target	     = COMP_FETCH_TARGET_RECT;
+	targetString = "RECT";
+    }
+
+    foreach (BicubicFunction *function, func)
+	if (function->param  == param  &&
+	    function->target == target &&
+	    function->unit   == unit)
+	    return function->handle;
+
+    data = new GLFragment::FunctionData ();
+    if (data)
+    {
+	int  handle = 0;
+	BicubicFunction *function = NULL;
+	
+	static char *filterTemp[] = {
+	    "hgX", "hgY", "cs00", "cs01", "cs10", "cs11"
+	};
+
+	for (int i = 0; i < sizeof (filterTemp) / sizeof (filterTemp[0]); i++)
+	    data->addTempHeaderOp (filterTemp[i]);
+
+
+	data->addDataOp (
+		"MAD cs00, fragment.texcoord[0], program.env[%d],"
+		"{-0.5, -0.5, 0.0, 0.0};", param + 2);
+	
+	data->addDataOp ( 
+		"TEX hgX, cs00.x, texture[%d], 1D;", unit);
+	data->addDataOp ( 
+		"TEX hgY, cs00.y, texture[%d], 1D;", unit);
+	
+	data->addDataOp (
+		"MUL cs10, program.env[%d], hgX.y;", param);
+	data->addDataOp (
+		"MUL cs00, program.env[%d], -hgX.x;", param);
+	data->addDataOp (
+		"MAD cs11, program.env[%d], hgY.y, cs10;", param + 1);
+	data->addDataOp (
+		"MAD cs01, program.env[%d], hgY.y, cs00;", param + 1);
+	data->addDataOp (
+		"MAD cs10, program.env[%d], -hgY.x, cs10;", param + 1);
+	data->addDataOp (
+		"MAD cs00, program.env[%d], -hgY.x, cs00;", param + 1);
+
+	data->addDataOp ( 
+		"ADD cs00, cs00, fragment.texcoord[0];");
+	data->addDataOp (
+		"ADD cs01, cs01, fragment.texcoord[0];");
+	data->addDataOp (
+		"ADD cs10, cs10, fragment.texcoord[0];");
+	data->addDataOp (
+		"ADD cs11, cs11, fragment.texcoord[0];");
+
+	data->addDataOp ( 
+		"TEX cs00, cs00, texture[0], %s;", targetString);
+	data->addDataOp (
+		"TEX cs01, cs01, texture[0], %s;", targetString);
+	data->addDataOp ( 
+		"TEX cs10, cs10, texture[0], %s;", targetString);
+	data->addDataOp ( 
+		"TEX cs11, cs11, texture[0], %s;", targetString);
+
+	data->addDataOp ( "LRP cs00, hgY.z, cs00, cs01;");
+	data->addDataOp ( "LRP cs10, hgY.z, cs10, cs11;");
+ 
+	data->addDataOp ( "LRP output, hgX.z, cs00, cs10;");
+	
+	data->addColorOp ( "output", "output");
+	if (!data->status ())
+	{
+	    delete data;
+	    return 0;
+	}
+	
+	function = new BicubicFunction ();
+	if (function)
+	{
+	    handle = data->createFragmentFunction ("bicubic");
+
+	    function->handle = handle;
+	    function->target = target;
+	    function->param  = param;
+	    function->unit   = unit;
+
+	    func.push_back (function);
+	}
+
+	delete data;
+
+	return handle;
+    }
+
+    return 0;
+}
+
+void
+BicubicWindow::glDrawTexture (GLTexture 	 *texture,
+			      GLFragment::Attrib &attrib,
+			      unsigned int       mask)
+{
+    BICUBIC_SCREEN (screen);
+
+    if ((mask & (PAINT_WINDOW_TRANSFORMED_MASK |
+	         PAINT_WINDOW_ON_TRANSFORMED_SCREEN_MASK)) &&
+        bs->gScreen->textureFilter () == GLTexture::Good)
+    {
+	GLFragment::Attrib fa = attrib;
+	int            function, param;
+	int            unit = 0;
+	
+	param = fa.allocParameters (3);
+	unit  = fa.allocTextureUnits (1);
+
+	function = bs->getBicubicFragmentFunction (texture, param, unit);
+	
+	if (function)
+	{
+	    fa.addFunction (function);
+
+	    GL::activeTexture (GL_TEXTURE0_ARB + unit);
+	    glBindTexture (GL_TEXTURE_1D, bs->lTexture);
+	    GL::activeTexture (GL_TEXTURE0_ARB);
+
+
+	    GL::programEnvParameter4f (GL_FRAGMENT_PROGRAM_ARB, param,
+					 texture->matrix ().xx, 0.0f,
+					 0.0f, 0.0f);
+	    GL::programEnvParameter4f (GL_FRAGMENT_PROGRAM_ARB,
+					 param + 1,
+					 0.0f, -texture->matrix ().yy,
+					 0.0f, 0.0f);
+	    GL::programEnvParameter4f (GL_FRAGMENT_PROGRAM_ARB,
+					 param + 2,
+					 1.0 / texture->matrix ().xx, 
+					 1.0 / -texture->matrix ().yy,
+					 0.0f, 0.0f);
+	}
+
+	gWindow->glDrawTexture (texture, fa, mask);
+	
+	if (unit)
+	{
+	    GL::activeTexture (GL_TEXTURE0_ARB + unit);
+	    glBindTexture (GL_TEXTURE_1D, 0);
+	    GL::activeTexture (GL_TEXTURE0_ARB);
+	}
+    }
+    else
+    {
+	gWindow->glDrawTexture (texture, attrib, mask);
+    }
+}
+
+void
+BicubicScreen::generateLookupTexture (GLenum format)
+{
+    GLfloat values[512];
+    float   a, a2, a3, w0, w1, w2, w3;
+
+    for (int i = 0; i < 512; i += 4)
+    {
+	a  = (float)i / 512.0;
+	a2 = a * a;
+	a3 = a2 * a;
+	
+	w0 = (1.0 / 6.0) * ((-a3) + (3.0 * a2) + (-3.0 * a) + 1.0);
+	w1 = (1.0 / 6.0) * ((3.0 * a3) + (-6.0 * a2) + 4.0);
+	w2 = (1.0 / 6.0) * ((-3.0 * a3) + (3.0 * a2) + (3.0 * a) + 1.0);
+	w3 = (1.0 / 6.0) * a3;
+	
+	values[i]     = 1.0 - (w1 / (w0 + w1)) + a;
+	values[i + 1] = 1.0 + (w3 / (w2 + w3)) - a;
+	values[i + 2] = w0 + w1;
+	values[i + 3] = w2 + w3;
+    }
+
+    glGenTextures (1, &lTexture);
+
+    glBindTexture (GL_TEXTURE_1D, lTexture);
+
+    glTexImage1D (GL_TEXTURE_1D, 0, format, 128, 0, GL_RGBA,
+		  GL_FLOAT, values);
+
+    glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+    glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+    glBindTexture (GL_TEXTURE_1D, 0);
+}
+
+
+BicubicScreen::BicubicScreen (CompScreen *screen) :
+    PluginClassHandler <BicubicScreen, CompScreen> (screen),
+    gScreen (GLScreen::get (screen)),
+    cScreen (CompositeScreen::get (screen))
+{
+    bool           failed = false;
+    const char     *glExtensions;
+    GLenum         format = GL_RGBA16F_ARB;
+
+    if (!GL::fragmentProgram)
+    {
+	compLogMessage ("bicube", CompLogLevelFatal,
+			"GL_ARB_fragment_program not supported.");
+	setFailed ();
+	failed = true;
+    }
+
+    if (!failed)
+    {
+
+	glExtensions = (const char *) glGetString (GL_EXTENSIONS);
+	if (!glExtensions)
+	{
+	    compLogMessage ("bicubic", CompLogLevelFatal,
+			    "No valid GL extensions string found.");
+	    setFailed ();
+	    failed = true;
+	}
+
+    }
+
+    if (!failed)
+    {
+
+	if (!strstr (glExtensions, "GL_ARB_texture_float"))
+	{
+	    compLogMessage ("bicubic", CompLogLevelFatal,
+			    "GL_ARB_texture_float not supported. "
+			    "This can lead to visual artifacts.");
+	    format = GL_RGBA;
+	}
+    }
+
+    generateLookupTexture (format);
+}
+
+BicubicScreen::~BicubicScreen ()
+{
+    BicubicFunction *f;
+    while (func.size ())
+    {
+	f = func.front ();
+	GLFragment::destroyFragmentFunction (f->handle);
+	func.remove (f);
+    }
+
+    glDeleteTextures (1, &lTexture);
+}
+
+BicubicWindow::BicubicWindow (CompWindow *window) :
+    PluginClassHandler <BicubicWindow, CompWindow> (window),
+    cWindow (CompositeWindow::get (window)),
+    gWindow (GLWindow::get (window))
+{
+    GLWindowInterface::setHandler (gWindow);
+}
+
+bool
+BicubicPluginVTable::init ()
+{
+    if (!CompPlugin::checkPluginABI ("core", CORE_ABIVERSION))
+	return false;
+    if (!CompPlugin::checkPluginABI ("composite", COMPIZ_COMPOSITE_ABI))
+	return false;
+    if (!CompPlugin::checkPluginABI ("opengl", COMPIZ_OPENGL_ABI))
+	return false;
+
+    return true;
+}
diff --git a/src/bicubic.h b/src/bicubic.h
new file mode 100644
index 0000000..4d7e0d5
--- /dev/null
+++ b/src/bicubic.h
@@ -0,0 +1,94 @@
+/*
+ *
+ * Compiz bicubic filter plugin
+ *
+ * bicubic.h
+ *
+ * Copyright : (C) 2008 by Dennis Kasprzyk
+ * E-mail    : onestone@opencompositing.org
+ *
+ * Ported to Compiz 0.9 by:
+ * Copyright : (C) 2008 by Sam Spilsbury
+ * E-mail    : smspillaz@gmail.com
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <core/core.h>
+#include <composite/composite.h>
+#include <opengl/opengl.h>
+
+#include "bicubic_options.h"
+
+class BicubicFunction
+{
+    public:
+	int handle;
+	int target;
+	int param;
+	int unit;
+};
+
+class BicubicScreen :
+    public PluginClassHandler <BicubicScreen, CompScreen>,
+    public BicubicOptions
+{
+    public:
+	BicubicScreen (CompScreen *screen);
+	~BicubicScreen ();
+
+	GLScreen        *gScreen;
+	CompositeScreen *cScreen;
+
+	std::list <BicubicFunction *> func;
+
+	GLenum lTexture;
+
+	int
+	getBicubicFragmentFunction (GLTexture   *texture,
+				    int         param,
+				    int         unit);
+
+	void
+	generateLookupTexture (GLenum format);
+};
+
+class BicubicWindow :
+    public PluginClassHandler <BicubicWindow, CompWindow>,
+    public GLWindowInterface
+{
+    public:
+	BicubicWindow (CompWindow *);
+
+	CompositeWindow *cWindow;
+	GLWindow	*gWindow;
+
+	void 
+	glDrawTexture (GLTexture *texture,
+		       GLFragment::Attrib &,
+		       unsigned int);
+};
+
+#define BICUBIC_SCREEN(s)						       \
+     BicubicScreen *bs = BicubicScreen::get (s)
+
+#define BICUBIC_WINDOW(w)						       \
+     BicubicWindow *bw = BicubicWindow::get (w)
+
+class BicubicPluginVTable :
+    public CompPlugin::VTableForScreenAndWindow <BicubicScreen, BicubicWindow>
+{
+    public:
+
+	bool init ();
+};