Initial C++ portHEADmaster

2 files changed, 929 insertions, 0 deletions

diff --git a/src/mousetrails.cpp b/src/mousetrails.cpp
new file mode 100644
index 0000000..21cbaee
--- /dev/null
+++ b/src/mousetrails.cpp
@@ -0,0 +1,731 @@
+/*
+ *
+ * Compiz mouse cursor trails plugin
+ *
+ * mousetrails.c
+ *
+ * Copyright : (C) 2008 by Erik Johnson
+ * 
+ * From code originally written by Dennis Kasprzyk
+ *
+ * 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 <cmath>
+#include <cstring>
+
+#include "mousetrails.h"
+
+COMPIZ_PLUGIN_20090315 (mousetrails, MousetrailsPluginVTable)
+
+void
+ParticleSystem::initParticles (int numParticles)
+{
+
+	if (mParticles)
+		free(mParticles);
+	//mParticles    = calloc(numParticles, sizeof(Particle));
+	mParticles    = (Particle *) calloc(TEXTURES_SIZE, sizeof(Particle));
+
+	mNumParticles = numParticles;
+	mNumDisplayedParticles = 0;
+	mSlowdown     = 1;
+	mActive       = FALSE;
+	mLastx	     = 0;
+	mLasty        = 0;
+	mLastGen      = 0;
+	mInitialAlpha = 1;
+	mSizeFactor   = 10;
+	mColorcounter = 0;
+	mX = 0;
+	mY = 0;
+	mSkip = 1;
+	mAtSkip = 0;
+	mSpeed = 1;
+	mUseMousepoll = 1;
+
+	mLastTextureFilled = -1;
+	mLastCursorIndex = 0;
+	mLastCursorSerial = 0;
+
+	// Initialize cache
+	mVertices_cache      = NULL;
+	mColors_cache        = NULL;
+	mCoords_cache        = NULL;
+	mVertex_cache_count  = 0;
+	mColor_cache_count   = 0;
+	mCoords_cache_count  = 0;
+
+	Particle *part = mParticles;
+	int i;
+	for (i = 0; i < TEXTURES_SIZE; i++, part++){
+		part->a = 0.0f;
+		part->r = 0.0f;
+		part->g = 0.0f;
+		part->b = 0.0f;
+	}
+
+
+	for (i = 0; i < TEXTURES_SIZE; i++){
+		mCursors[i].cursor_serial = 0;
+		mCursors[i].xhot = 0;
+		mCursors[i].yhot = 0;
+		mCursors[i].width = 0;
+		mCursors[i].height = 0;
+	}
+
+	for (i = 0; i < TEXTURES_SIZE; i++) glGenTextures(1, &mCursors[i].texture);
+
+}
+
+
+void
+ParticleSystem::drawParticles ()
+{
+	if (mNumDisplayedParticles == 0) return;
+
+	glEnable(GL_BLEND);
+	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+	glEnableClientState(GL_COLOR_ARRAY);
+	glBlendFunc(GL_SRC_ALPHA, mBlendMode);
+	glEnable(GL_TEXTURE_2D);
+
+
+	// Check that the caches are correct size 
+
+	if (mVertex_cache_count != 1)
+	{
+		mVertices_cache =
+			(GLfloat *) realloc(mVertices_cache,
+					4 * 3 * sizeof(GLfloat));
+		mVertex_cache_count = 1;
+	}
+
+	if (mCoords_cache_count != 1)
+	{
+		mCoords_cache =
+			(GLfloat *) realloc(mCoords_cache,
+					4 * 2 * sizeof(GLfloat));
+		mCoords_cache_count = 1;
+	}
+
+	if (mColor_cache_count  != 1)
+	{
+		mColors_cache =
+			(GLfloat *) realloc(mColors_cache,
+					4 * 4 * sizeof(GLfloat));
+		mColor_cache_count = 1;
+	}
+
+
+	GLfloat *vertices = mVertices_cache;
+	GLfloat *coords   = mCoords_cache;
+	GLfloat *colors   = mColors_cache;
+
+	int cornersSize = sizeof (GLfloat) * 8;
+	int colorSize   = sizeof (GLfloat) * 4;
+
+	GLfloat cornerCoords[8] = {0.0, 0.0,
+		0.0, 1.0,
+		1.0, 1.0,
+		1.0, 0.0};
+
+	int numActive = 0;
+
+	Particle *part = mParticles;
+	int i;
+	for (i = 0; i < mNumParticles; i++, part++)
+	{
+		//if (part->life > 0.0f)
+		if (part->fade > 0.001f)
+		{
+			numActive += 4;
+
+			float w = part->width / 2;
+			float h = part->height / 2;
+
+			w += (w * part->w_mod) * (1- part->a);
+			h += (h * part->h_mod) * (1- part->a);
+
+			vertices[0] = part->x - w;
+			vertices[1] = part->y - h;
+			vertices[2] = part->z;
+
+			vertices[3] = part->x - w;
+			vertices[4] = part->y + h;
+			vertices[5] = part->z;
+
+			vertices[6] = part->x + w;
+			vertices[7] = part->y + h;
+			vertices[8] = part->z;
+
+			vertices[9]  = part->x + w;
+			vertices[10] = part->y - h;
+			vertices[11] = part->z;
+
+			//vertices += 12;
+
+			memcpy (coords, cornerCoords, cornersSize);
+
+			//coords += 8;
+
+			colors[0] = part->r;
+			colors[1] = part->g;
+			colors[2] = part->b;
+			colors[3] = part->a; 
+			memcpy (colors + 4, colors, colorSize);
+			memcpy (colors + 8, colors, colorSize);
+			memcpy (colors + 12, colors, colorSize);
+
+			//colors += 16;
+
+			if (mCursors[part->cursorIndex].texture)
+			{
+				glPushMatrix();
+
+				glBindTexture(GL_TEXTURE_2D, mCursors[part->cursorIndex].texture);
+
+				glTexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), mCoords_cache);
+				glVertexPointer(3, GL_FLOAT, 3 * sizeof(GLfloat), mVertices_cache);
+				glColorPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), mColors_cache);
+
+				// draw particles
+				glDrawArrays(GL_QUADS, 0, numActive);
+
+				glPopMatrix();
+			}
+
+		}
+
+	}
+
+
+	glDisableClientState(GL_COLOR_ARRAY);
+	glColor4usv(defaultColor);
+	GLScreen::get(screen)->setTexEnvMode (GL_REPLACE);
+	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+	glDisable(GL_TEXTURE_2D);
+	glDisable(GL_BLEND);
+
+}
+
+void
+ParticleSystem::updateParticles (float time)
+{
+	int i;
+	Particle *part;
+	float speed    = (time / 5000.0);
+
+	mActive = FALSE;
+
+	part = mParticles;
+
+	int numDisplayedParticles = 0;
+
+	for (i = 0; i < mNumParticles; i++, part++)
+	{
+		if (part->a > 0.001f)
+		{
+			// modify opacity
+			part->a -= 50 * part->a * part->fade * speed;
+			mActive  = TRUE;
+
+			numDisplayedParticles++;
+		}
+	}
+	mNumDisplayedParticles = numDisplayedParticles;
+}
+
+void
+ParticleSystem::finiParticles ()
+{
+	free(mParticles);
+	if (mVertices_cache)
+		free(mVertices_cache);
+	if (mColors_cache)
+		free(mColors_cache);
+	if (mCoords_cache)
+		free(mCoords_cache);
+
+	int i;
+	for (i = 0; i < TEXTURES_SIZE; i++) glDeleteTextures(1, &mCursors[i].texture);
+
+}
+
+
+/*
+Window       root_return;
+Window       child_return;
+int          rootX, rootY;
+int          winX, winY;
+unsigned int maskReturn;
+Bool         status;*/
+
+void
+ParticleSystem::genNewParticles (int time)
+{
+	MOUSETRAILS_SCREEN (screen);
+
+
+	mSkip = ss->optionGetSkip () ;
+	mAtSkip = (mAtSkip + 1) % mSkip;
+	if (mAtSkip != 0) return;
+
+	Bool rColor     = ss->optionGetRandom ();
+	//float life      = ss->optionGetLife ();
+	int sizeFactor  = mSizeFactor;
+	//float lifeNeg   = 1 - life;
+	//float fadeExtra = 0.05f * (1.01 - life);
+	int cursorIndex = 0;
+
+	unsigned short *c = ss->optionGetColor ();
+
+	float colr1 = (float)c[0] / 0xffff;
+	float colg1 = (float)c[1] / 0xffff;
+	float colb1 = (float)c[2] / 0xffff;
+	//float cola  = (float)c[3] / 0xffff;
+
+	float partw = mCursors[mLastCursorIndex].width;
+	float parth = mCursors[mLastCursorIndex].height;
+
+	float partoffw = mCursors[mLastCursorIndex].xhot;
+	float partoffh = mCursors[mLastCursorIndex].yhot;
+
+	int livex;
+	int livey;
+
+	// get x cursor position (rootX and rootY)
+	/*if (!mUseMousepoll){
+		status = XQueryPointer (s->display->display, s->root,
+			    &root_return, &child_return,
+			    &rootX, &rootY, &winX, &winY, &maskReturn);
+
+		livex = rootX;
+		livey = rootY;
+	}
+	else
+	{*/
+		livex = ss->mPosX;
+		livey = ss->mPosY;
+	//}
+
+	int deltax = livex - mX;
+	int deltay = livey - mY;
+	int delta = deltax * deltax + deltay * deltay;
+	mX = livex;
+	mY = livey;
+	//if (delta < threshold * threshold) return;
+	if (delta < 1 ) return;
+
+	int newx = (float)(mX + partw/2 - partoffw);
+	int newy = (float)(mY + parth/2 - partoffh);
+
+
+	Particle *part = mParticles;
+	int i;
+
+	// possibly crashy
+	if (ss->optionGetNumParticles() != mNumParticles){
+	  //initParticles(ss->optionGetNumParticles (), ss->ps);
+		mNumParticles = ss->optionGetNumParticles();
+		mLastGen = -1;
+			/*ps->slowdown = ss->optionGetSlowdown ();
+			mInitialAlpha = ss->optionGetAlpha () ;
+			mSizeFactor = ss->optionGetSize () ;
+			mThreshold = ss->optionGetThreshold () ;
+			mColorrate = ss->optionGetColorrate () ;*/
+		for (i = 0; i < mNumParticles; i++, part++){
+			part->a = 0.0f;
+			part->r = 0.0f;
+			part->g = 0.0f;
+			part->b = 0.0f;
+		}
+	}
+	
+
+	//if (delta > threshold * threshold) max_new = 1;
+
+	int nextGen = (mLastGen + 1) % mNumParticles;
+
+	for (i = 0; i < mNumParticles; i++, part++)
+	{
+		if (i == nextGen)
+		{
+			// record the particle number being generated
+			mLastGen = i;
+
+			cursorIndex = ss->cursorUpdate ();
+
+			mSlowdown = ss->optionGetSlowdown ();
+			mInitialAlpha = ss->optionGetAlpha () ;
+			mSizeFactor = ss->optionGetSize () ;
+			mThreshold = ss->optionGetThreshold () ;
+			mColorrate = ss->optionGetColorrate () ;
+
+			// set the cursor array index
+			part->cursorIndex = mLastCursorIndex = cursorIndex;
+
+			part->fade = mSlowdown / 10.0;
+
+			// set size
+			part->width = partw;
+			part->height = parth;
+			part->w_mod = part->h_mod = ((float)sizeFactor - 10.0) / 10.0;
+
+			// set direction
+			part->xd = newx - mLastx;
+			part->yd = newy - mLasty;
+
+			// set position
+			part->x = newx;
+			part->y = newy;
+			mLastx = newx;
+			mLasty = newy;
+			part->z  = 0.0;
+
+
+			if (rColor)
+			{
+				float value;
+				// linear smoothing
+				value = mColorcounter;
+				// sinwave smoothing - nothing spectacular
+				//value = (float)mColorrate - ((float)mColorrate / 2) * (1 + cos (3.14159 * (float)mColorcounter / (float)mColorrate));
+
+				if (mColorcounter == 0)
+				{
+					mR2 = (float)(random() & 0xff) / 255;
+					mG2 = (float)(random() & 0xff) / 255;
+					mB2 = (float)(random() & 0xff) / 255;
+				}
+				mR = ((float)mColorrate - value)/(float)mColorrate * mR + value/(float)mColorrate * mR2;
+				mG = ((float)mColorrate - value)/(float)mColorrate * mG + value/(float)mColorrate * mG2;
+				mB = ((float)mColorrate - value)/(float)mColorrate * mB + value/(float)mColorrate * mB2;
+				part->r = mR;
+				part->g = mG;
+				part->b = mB;
+				mColorcounter = (mColorcounter + 1) % mColorrate;
+			}
+			else
+			{
+				part->r = colr1;
+				part->g = colg1;
+				part->b = colb1;
+			}
+			// set transparancy
+			//part->a = mInitialAlpha;
+			float thresholdfactor = 1.0;
+			if (delta < mThreshold) thresholdfactor = (float)delta / (float)mThreshold;
+			part->a = mInitialAlpha * thresholdfactor;
+
+			mActive = TRUE;
+		}
+	}
+}
+
+// damageRegion() seems to cause blockiness or jitters on the background window when scrolling, like on a webpage
+
+void
+MousetrailsScreen::damageRegion ()
+{
+	int      i;
+	Particle *p;
+	float    w, h, x1, x2, y1, y2;
+
+	if (mPs->mNumDisplayedParticles == 0) return;
+
+	if (!mPs)
+		return;
+
+	x1 = screen->width ();
+	x2 = 0;
+	y1 = screen->height ();
+	y2 = 0;
+
+	p = mPs->mParticles;
+
+	for (i = 0; i < mPs->mNumParticles; i++, p++)
+	{
+		if (p->a > 0.001f){
+			w = p->width / 2;
+			h = p->height / 2;
+
+			w += (w * p->w_mod) * p->a;
+			h += (h * p->h_mod) * p->a;
+
+			x1 = MIN (x1, p->x - w);
+			x2 = MAX (x2, p->x + w);
+			y1 = MIN (y1, p->y - h);
+			y2 = MAX (y2, p->y + h);
+		}
+	}
+
+	CompRegion r (floor (x1), floor (y1), ceil (x2) - floor (x1),
+				  	      ceil (y2) - floor (y1));
+
+	cScreen->damageRegion (r);
+}
+
+int
+MousetrailsScreen::cursorUpdate ()
+{
+
+	Display * dpy = screen->dpy ();
+	XFixesCursorImage *ci = XFixesGetCursorImage(dpy);
+
+	/* Hack to avoid changing to an invisible (bugged)cursor image.
+	 * Example: The animated firefox cursors.
+	 */
+	if (ci->width <= 1 && ci->height <= 1)
+	{
+		XFree (ci);
+		return mPs->mLastCursorIndex;
+	}
+
+	// only update cursor if necessary (instead of all the time)
+	if (ci->cursor_serial == mPs->mLastCursorSerial)
+	{
+		XFree (ci);
+		return mPs->mLastCursorIndex;
+	}
+
+	// see if cursor already exists in textures
+	int i;
+	for (i = 0; i < TEXTURES_SIZE; i++){
+		if (ci->cursor_serial == mPs->mCursors[i].cursor_serial){
+			mPs->mLastCursorSerial = ci->cursor_serial;
+			XFree (ci);
+			return i;
+		}
+	}
+
+	// otherwise grab the new cursor into textures
+	int fillTexture = (mPs->mLastTextureFilled + 1) % TEXTURES_SIZE;
+
+	unsigned char *pixels = (unsigned char *) malloc(ci->width * ci->height * 4);
+
+	for (i = 0; i < ci->width * ci->height; i++)
+	{
+		unsigned long pix = ci->pixels[i];
+		pixels[i * 4] = pix & 0xff;
+		pixels[(i * 4) + 1] = (pix >> 8) & 0xff;
+		pixels[(i * 4) + 2] = (pix >> 16) & 0xff;
+		pixels[(i * 4) + 3] = (pix >> 24) & 0xff;
+	}
+
+	glBindTexture(GL_TEXTURE_2D, mPs->mCursors[fillTexture].texture);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, ci->width, ci->height, 0,
+			GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+	glBindTexture(GL_TEXTURE_2D, 0);
+
+	// save data for this cursor
+	mPs->mCursors[fillTexture].cursor_serial = mPs->mLastCursorSerial = ci->cursor_serial;
+	mPs->mCursors[fillTexture].xhot = ci->xhot;
+	mPs->mCursors[fillTexture].yhot = ci->yhot;
+	mPs->mCursors[fillTexture].width = ci->width;
+	mPs->mCursors[fillTexture].height = ci->height;
+	mPs->mLastTextureFilled = fillTexture;
+
+	XFree (ci);
+	free (pixels);
+
+	return fillTexture;
+}
+
+
+void
+MousetrailsScreen::positionUpdate (const CompPoint &p)
+{
+    int x = p.x ();
+    int y = p.y ();
+
+    mPosX = x;
+    mPosY = y;
+}
+
+
+
+void
+MousetrailsScreen::preparePaint (int time)
+{
+	//Bool useMousepoll = optionGetMousepoll ();
+
+	if (mActive && !mPollHandle.active ())
+	{
+		CompPoint p = mPollHandle.getCurrentPosition ();
+		mPosX = p.x ();
+		mPosY = p.y ();
+		mPollHandle.start ();
+	}
+
+	if (mActive && !mPs)
+	{
+		mPs = (ParticleSystem *) calloc(1, sizeof(ParticleSystem));
+		if (!mPs)
+		{
+			cScreen->preparePaint (time);;
+			return;
+		}
+		mPs->initParticles(optionGetNumParticles ());
+
+		mPs->mSlowdown = optionGetSlowdown ();
+		mPs->mInitialAlpha = optionGetAlpha () ;
+		mPs->mThreshold = optionGetThreshold () ;
+		mPs->mColorrate = optionGetColorrate () ;
+		mPs->mSizeFactor = optionGetSize () ;
+		mPs->mSkip = optionGetSkip () ;
+		mPs->mBlendMode = GL_ONE_MINUS_SRC_ALPHA;
+		//mPs->useMousepoll = optionGetMousepoll ();
+
+		cursorUpdate ();
+
+	}
+
+
+	if (mPs && mPs->mActive)
+	{
+		mPs->updateParticles (time);
+		damageRegion ();
+	}
+
+	if (mPs && mActive)
+		mPs->genNewParticles (time);
+
+	cScreen->preparePaint (time);
+
+}
+
+void
+MousetrailsScreen::donePaint ()
+{
+
+	if (mActive || (mPs && mPs->mActive))
+		damageRegion ();
+
+	if (!mActive && mPollHandle.active () && mPs->mUseMousepoll)
+	{
+		mPollHandle.stop ();
+	}
+
+	if (!mActive && mPs && !mPs->mActive)
+	{
+		mPs->finiParticles ();
+		free (mPs);
+		mPs = NULL;
+	}
+
+	cScreen->donePaint ();
+}
+
+bool
+MousetrailsScreen::glPaintOutput (const GLScreenPaintAttrib &attrib,
+				  const GLMatrix	    &transform,
+				  const CompRegion	    &region,
+				  CompOutput		    *output,
+				  unsigned int		    mask)
+{
+	bool           status;
+	GLMatrix       sTransform (transform);
+
+	status = gScreen->glPaintOutput (attrib, transform, region, output, mask);	
+
+	if (!mPs || !mPs->mActive)
+		return status;
+
+// this doesn't seem to work
+//	if (mask & PAINT_SCREEN_TRANSFORMED_MASK) return FALSE;
+
+	sTransform.toScreenSpace (output, -DEFAULT_Z_CAMERA);
+
+	glPushMatrix ();
+	glLoadMatrixf (sTransform.getMatrix ());
+
+	mPs->drawParticles ();
+
+	glPopMatrix();
+
+	glColor4usv (defaultColor);
+
+	return status;
+}
+
+bool
+MousetrailsScreen::terminate (CompAction         *action,
+			      CompAction::State  state,
+			      CompOption::Vector options)
+{
+    mActive = false;
+    damageRegion ();
+
+    return true;
+}
+
+bool
+MousetrailsScreen::initiate (CompAction         *action,
+			     CompAction::State  state,
+			     CompOption::Vector &options)
+{
+
+    if (mActive)
+	return terminate (action, state, options);
+
+    mActive = true;
+
+    return true;
+}
+
+MousetrailsScreen::MousetrailsScreen (CompScreen *screen) :
+    PluginClassHandler <MousetrailsScreen, CompScreen> (screen),
+    cScreen (CompositeScreen::get (screen)),
+    gScreen (GLScreen::get (screen)),
+    mPosX (0),
+    mPosY (0),
+    mActive (false),
+    mPs (NULL)
+{
+    CompositeScreenInterface::setHandler (cScreen);
+    GLScreenInterface::setHandler (gScreen);
+
+    mPollHandle.setCallback (boost::bind (&MousetrailsScreen::positionUpdate, this, _1));
+
+    optionSetInitiateInitiate (boost::bind (&MousetrailsScreen::initiate, this, _1, _2, _3));
+    optionSetInitiateTerminate (boost::bind (&MousetrailsScreen::terminate, this, _1, _2, _3));
+}
+
+MousetrailsScreen::~MousetrailsScreen ()
+{
+    if (mPollHandle.active ())
+	mPollHandle.stop ();
+
+    if (mPs && mPs->mActive)
+    {
+	mPs->finiParticles ();
+	free (mPs);
+	cScreen->damageScreen ();
+    }
+}
+
+bool
+MousetrailsPluginVTable::init ()
+{
+    if (!CompPlugin::checkPluginABI ("core", CORE_ABIVERSION) ||
+	!CompPlugin::checkPluginABI ("composite", COMPIZ_COMPOSITE_ABI) ||
+	!CompPlugin::checkPluginABI ("opengl", COMPIZ_OPENGL_ABI) ||
+	!CompPlugin::checkPluginABI ("mousepoll", COMPIZ_MOUSEPOLL_ABI))
+	return false;
+
+    return true;
+}
diff --git a/src/mousetrails.h b/src/mousetrails.h
new file mode 100644
index 0000000..c554184
--- /dev/null
+++ b/src/mousetrails.h
@@ -0,0 +1,198 @@
+/*
+ *
+ * Compiz mouse cursor trails plugin
+ *
+ * mousetrails.h
+ *
+ * Copyright : (C) 2008 by Erik Johnson
+ * 
+ * From code originally written by Dennis Kasprzyk
+ *
+ * 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 <cmath>
+
+#include <core/core.h>
+#include <composite/composite.h>
+#include <opengl/opengl.h>
+#include <mousepoll/mousepoll.h>
+
+#include "mousetrails_options.h"
+
+// in theory the texture array size should be >= trail size
+#define TEXTURES_SIZE 51
+
+class Particle
+{
+    public:
+	//float life;			// particle life
+	float fade;			// fade speed
+	float width;			// particle width
+	float height;			// particle height
+	float w_mod;			// particle size modification during life
+	float h_mod;			// particle size modification during life
+	float r;			// red value
+	float g;			// green value
+	float b;			// blue value
+	float a;			// alpha value
+	float x;			// X position
+	float y;			// Y position
+	float z;			// Z position
+	float xd;
+	float yd;
+	int cursorIndex;		// array index of cursor serial number
+};
+
+class MouseCursor
+{
+    public:
+	GLuint texture;
+	unsigned long cursor_serial;
+	unsigned short xhot;
+	unsigned short yhot;
+	unsigned short width;
+	unsigned short height;
+};
+
+class ParticleSystem
+{
+    public:
+	int      mNumParticles;
+	Particle *mParticles;
+	float    mSlowdown;
+	float    mThreshold;
+	Bool     mActive;
+	int      mX, mY;
+	GLuint   mBlendMode;
+
+	int mLastx, mLasty;
+	float mDelta;
+	int mNumDisplayedParticles;
+	int mLastGen;
+	float mInitialAlpha;
+	int mSizeFactor;
+	Bool mUseMousepoll;
+
+	// for random colors
+	int mColorcounter;
+	float mR;			// red value
+	float mG;			// green value
+	float mB;			// blue value
+	float mR2;			// red value
+	float mG2;			// green value
+	float mB2;			// blue value
+	int mColorrate;
+	int mSkip;
+	int mAtSkip;
+	int mSpeed;
+
+	// Cursor data
+	MouseCursor mCursors[TEXTURES_SIZE];          // rolling array of cursors grabbed from x
+	int mLastTextureFilled;                       // last slot used in textures
+	unsigned long mLastCursorSerial;              // last cursor serial number grabbed from X
+	int mLastCursorIndex;                         // ...and its associated array index
+
+	// Moved from drawParticles to get rid of spurious malloc's
+	GLfloat *mVertices_cache;
+	int     mVertex_cache_count;
+	GLfloat *mCoords_cache;
+	int     mCoords_cache_count;
+	GLfloat *mColors_cache;
+	int     mColor_cache_count;
+
+	void
+	initParticles (int f_numParticles);
+
+	void
+	drawParticles ();
+
+	void
+	updateParticles (float time);
+
+	void
+	finiParticles ();
+
+	void
+	genNewParticles (int time);
+
+};
+
+class MousetrailsScreen :
+    public PluginClassHandler <MousetrailsScreen, CompScreen>,
+    public CompositeScreenInterface,
+    public GLScreenInterface,
+    public MousetrailsOptions
+{
+    public:
+
+	MousetrailsScreen (CompScreen *screen);
+	~MousetrailsScreen ();
+
+    public:
+
+	CompositeScreen *cScreen;
+	GLScreen	*gScreen;
+
+	int mPosX;
+	int mPosY;
+
+	Bool mActive;
+
+	ParticleSystem *mPs;
+
+	MousePoller mPollHandle;
+
+	void
+	preparePaint (int);
+
+	bool
+	glPaintOutput (const GLScreenPaintAttrib &,
+		       const GLMatrix		 &,
+		       const CompRegion		 &,
+		       CompOutput		 *,
+		       unsigned int		    );
+
+	void
+	donePaint ();
+
+	void
+	damageRegion ();
+
+	void
+	positionUpdate (const CompPoint &p);
+
+	bool
+	terminate (CompAction         *action,
+		   CompAction::State  state,
+		   CompOption::Vector options);
+
+	bool
+	initiate (CompAction         *action,
+		  CompAction::State  state,
+		  CompOption::Vector &options);
+
+	int
+	cursorUpdate ();
+
+};
+
+#define MOUSETRAILS_SCREEN(s)						      \
+    MousetrailsScreen *ss = MousetrailsScreen::get (s);
+
+class MousetrailsPluginVTable :
+    public CompPlugin::VTableForScreen <MousetrailsScreen>
+{
+    public:
+
+	bool init ();
+};