diff --git a/Graphs/gFlagsLine.cpp b/Graphs/gFlagsLine.cpp
index 92343807..ae61b5be 100644
--- a/Graphs/gFlagsLine.cpp
+++ b/Graphs/gFlagsLine.cpp
@@ -12,15 +12,11 @@
 
 gFlagsGroup::gFlagsGroup()
 {
-    static QColor col1=QColor(0xd0,0xff,0xd0,0xff);
-    static QColor col2=QColor(0xff,0xff,0xff,0xff);
     static QColor col=Qt::black;
 
-    addGLBuf(quad1=new GLBuffer(col1,512,GL_QUADS));
-    addGLBuf(quad2=new GLBuffer(col2,512,GL_QUADS));
-    addGLBuf(lines=new GLBuffer(col,20,GL_LINE_LOOP));
-    quad1->setAntiAlias(true);
-    quad2->setAntiAlias(true);
+    addGLBuf(quads=new GLShortBuffer(512,GL_QUADS));
+    addGLBuf(lines=new GLShortBuffer(20,GL_LINE_LOOP));
+    quads->setAntiAlias(true);
     lines->setAntiAlias(false);
 }
 gFlagsGroup::~gFlagsGroup()
@@ -64,23 +60,20 @@ void gFlagsGroup::paint(gGraph &w, int left, int top, int width, int height)
     float barh=float(height)/float(vis);
     float linetop=top;
 
+    static QColor col1=QColor(0xd0,0xff,0xd0,0xff);
+    static QColor col2=QColor(0xff,0xff,0xff,0xff);
+    QColor * barcol;
     for (int i=0;i<lvisible.size();i++) {
         // Alternating box color
-        //QColor * barcol=&col2;
-        if (i & 1) {
-            quad1->add(left,linetop,left,linetop+barh);
-            quad1->add(left+width-1,linetop+barh,left+width-1,linetop);
-        } else {
-            quad2->add(left,linetop,left,linetop+barh);
-            quad2->add(left+width-1,linetop+barh,left+width-1,linetop);
-        }
+        if (i & 1) barcol=&col1; else barcol=&col2;
+        quads->add(left,linetop,left,linetop+barh,left+width-1,linetop+barh,left+width-1,linetop,*barcol);
 
         // Paint the actual flags
         lvisible[i]->paint(w,left,linetop,width,barh);
         linetop+=barh;
     }
 
-    GLBuffer *outlines=w.lines();
+    GLShortBuffer *outlines=w.lines();
     QColor blk=Qt::black;
     outlines->add(left-1, top, left-1, top+height, blk);
     outlines->add(left-1, top+height, left+width,top+height, blk);
@@ -94,7 +87,7 @@ void gFlagsGroup::paint(gGraph &w, int left, int top, int width, int height)
 gFlagsLine::gFlagsLine(ChannelID code,QColor flag_color,QString label,bool always_visible,FlagType flt)
 :Layer(code),m_label(label),m_always_visible(always_visible),m_flt(flt),m_flag_color(flag_color)
 {
-    addGLBuf(quads=new GLBuffer(flag_color,2048,GL_QUADS));
+    addGLBuf(quads=new GLShortBuffer(2048,GL_QUADS));
     //addGLBuf(lines=new GLBuffer(flag_color,1024,GL_LINES));
     quads->setAntiAlias(true);
     //lines->setAntiAlias(true);
diff --git a/Graphs/gFlagsLine.h b/Graphs/gFlagsLine.h
index 3a4deeea..57c21e8e 100644
--- a/Graphs/gFlagsLine.h
+++ b/Graphs/gFlagsLine.h
@@ -31,7 +31,7 @@ class gFlagsLine:public Layer
         int total_lines,line_num;
         FlagType m_flt;
         QColor m_flag_color;
-        GLBuffer *quads, *lines;
+        GLShortBuffer *quads, *lines;
         int m_lx, m_ly;
 };
 
@@ -46,7 +46,7 @@ public:
     virtual qint64 Maxx();
     virtual void SetDay(Day *);
 protected:
-    GLBuffer *quad1, *quad2, *lines;
+    GLShortBuffer *quads, *lines;
     QVector<gFlagsLine *> lvisible;
 };
 
diff --git a/Graphs/gFooBar.cpp b/Graphs/gFooBar.cpp
index b2bcdc63..3a6004a4 100644
--- a/Graphs/gFooBar.cpp
+++ b/Graphs/gFooBar.cpp
@@ -6,12 +6,11 @@
 #include <cmath>
 #include "gFooBar.h"
 
-gShadowArea::gShadowArea(QColor shadow_color)
-:Layer(""),m_shadow_color(shadow_color)
+gShadowArea::gShadowArea(QColor shadow_color,QColor line_color)
+:Layer(""),m_shadow_color(shadow_color),m_line_color(line_color)
 {
-    QColor col=Qt::blue;
-    addGLBuf(quads=new GLBuffer(shadow_color,20,GL_QUADS));
-    addGLBuf(lines=new GLBuffer(col,20,GL_LINES));
+    addGLBuf(quads=new GLShortBuffer(20,GL_QUADS));
+    addGLBuf(lines=new GLShortBuffer(20,GL_LINES));
     quads->forceAntiAlias(true);
     lines->setAntiAlias(true);
     lines->setSize(2);
@@ -36,13 +35,11 @@ void gShadowArea::paint(gGraph & w,int left, int top, int width, int height)
     double px=((1/rmx)*(w.min_x-w.rmin_x))*width;
     double py=((1/rmx)*(w.max_x-w.rmin_x))*width;
 
-    quads->add(start_px,top,start_px,top+height);
-    quads->add(start_px+px, top+height, start_px+px, top);
-    quads->add(start_px+py, top, start_px+py, top+height);
-    quads->add(end_px, top+height, end_px, top);
+    quads->add(start_px,top,start_px,top+height,start_px+px, top+height, start_px+px, top,m_shadow_color);
+    quads->add(start_px+py, top, start_px+py, top+height,end_px, top+height, end_px, top,m_shadow_color);
 
-    lines->add(start_px+px, top, start_px+py, top);
-    lines->add(start_px+px, top+height+1, start_px+py, top+height+1);
+    lines->add(start_px+px, top, start_px+py, top,m_line_color);
+    lines->add(start_px+px, top+height+1, start_px+py, top+height+1,m_line_color);
 }
 
 gFooBar::gFooBar(int offset,QColor handle_color,QColor line_color)
diff --git a/Graphs/gFooBar.h b/Graphs/gFooBar.h
index d4528b4e..ffca9f07 100644
--- a/Graphs/gFooBar.h
+++ b/Graphs/gFooBar.h
@@ -12,13 +12,14 @@
 class gShadowArea:public Layer
 {
     public:
-        gShadowArea(QColor shadow_color=QColor(40,40,40,40));
+        gShadowArea(QColor shadow_color=QColor(40,40,40,40),QColor line_color=QColor("blue"));
         virtual ~gShadowArea();
         virtual void paint(gGraph & w,int left, int top, int width, int height);
     protected:
         QColor m_shadow_color;
-        GLBuffer *quads;
-        GLBuffer *lines;
+        QColor m_line_color;
+        GLShortBuffer *quads;
+        GLShortBuffer *lines;
 };
 
 class gFooBar:public Layer
diff --git a/Graphs/gGraphView.cpp b/Graphs/gGraphView.cpp
index 18deafa5..a3020a60 100644
--- a/Graphs/gGraphView.cpp
+++ b/Graphs/gGraphView.cpp
@@ -52,55 +52,34 @@ void GetTextExtent(QString text, int & width, int & height, QFont *font)
     mut.unlock();
 }
 
-GLBuffer::GLBuffer(QColor color,int max,int type)
-    :m_color(color), m_max(max), m_type(type)
+GLBuffer::GLBuffer(int max,int type)
+    :m_max(max), m_type(type)
 {
     m_scissor=false;
     m_antialias=true;
     m_forceantialias=false;
-    buffer=new GLshort [max+8];
-    //if (m_type==GL_LINES) {
-    colors=new GLubyte[max*4+(8*4)];
-    //} else colors=NULL;
     m_cnt=0;
     m_colcnt=0;
     m_size=1;
 }
 GLBuffer::~GLBuffer()
+{
+}
+///////
+
+GLShortBuffer::GLShortBuffer(int max,int type)
+    :GLBuffer(max,type)
+{
+    buffer=new GLshort [max+8];
+    colors=new GLubyte[max*4+(8*4)];
+}
+GLShortBuffer::~GLShortBuffer()
 {
     if (colors) delete [] colors;
     if (buffer) delete [] buffer;
 }
-void GLBuffer::add(GLshort s)
-{
-    if (m_cnt<m_max) {
-        buffer[m_cnt++]=s;
-    } else {
-        qDebug() << "GLBuffer overflow";
-    }
-}
-void GLBuffer::add(GLshort x, GLshort y)
-{
-    if (m_cnt<m_max+2) {
-        buffer[m_cnt++]=x;
-        buffer[m_cnt++]=y;
-    } else {
-        qDebug() << "GLBuffer overflow";
-    }
-}
-void GLBuffer::add(GLshort x1, GLshort y1, GLshort x2, GLshort y2)
-{
-    if (m_cnt<m_max+4) {
-        buffer[m_cnt++]=x1;
-        buffer[m_cnt++]=y1;
-        buffer[m_cnt++]=x2;
-        buffer[m_cnt++]=y2;
-    } else {
-        qDebug() << "GLBuffer overflow";
-    }
-}
 
-void GLBuffer::add(GLshort x, GLshort y,QColor & color)
+void GLShortBuffer::add(GLshort x, GLshort y,QColor & color)
 {
     if (m_cnt<m_max+2) {
         mutex.lock();
@@ -115,7 +94,7 @@ void GLBuffer::add(GLshort x, GLshort y,QColor & color)
         qDebug() << "GLBuffer overflow";
     }
 }
-void GLBuffer::add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,QColor & color)
+void GLShortBuffer::add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,QColor & color)
 {
     if (m_cnt<m_max+4) {
         mutex.lock();
@@ -136,7 +115,7 @@ void GLBuffer::add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,QColor & color
         qDebug() << "GLBuffer overflow";
     }
 }
-void GLBuffer::add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,GLshort x3, GLshort y3, GLshort x4, GLshort y4,QColor & color) // add with vertex colors
+void GLShortBuffer::add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,GLshort x3, GLshort y3, GLshort x4, GLshort y4,QColor & color) // add with vertex colors
 {
 if (m_cnt<m_max+8) {
     mutex.lock();
@@ -170,7 +149,7 @@ if (m_cnt<m_max+8) {
     qDebug() << "GLBuffer overflow";
 }
 }
-void GLBuffer::draw()
+void GLShortBuffer::draw()
 {
     if (m_cnt>0) {
         bool antialias=m_forceantialias || (pref["UseAntiAliasing"].toBool() && m_antialias);
@@ -201,21 +180,12 @@ void GLBuffer::draw()
 
         glVertexPointer(2, GL_SHORT, 0, buffer);
 
-        if (m_colcnt<=0) {
-            glColor4ub(m_color.red(),m_color.green(),m_color.blue(),m_color.alpha());
-        } else {
-            glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
-        }
+        glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
 
         glEnableClientState(GL_VERTEX_ARRAY);
-        if (m_colcnt>0) {
-            glEnableClientState(GL_COLOR_ARRAY);
-        }
+        glEnableClientState(GL_COLOR_ARRAY);
         glDrawArrays(m_type, 0, m_cnt >> 1);
-
-        if (m_colcnt>0) {
-            glDisableClientState(GL_COLOR_ARRAY);
-        }
+        glDisableClientState(GL_COLOR_ARRAY);
         glDisableClientState(GL_VERTEX_ARRAY);
 
 
@@ -240,6 +210,225 @@ void GLBuffer::draw()
     }
 }
 
+/////////////////////////////////////////////////////////////////////
+// GLFloatBuffer
+
+GLFloatBuffer::GLFloatBuffer(int max,int type)
+    :GLBuffer(max,type)
+{
+    buffer=new GLfloat [max+8];
+    colors=new GLubyte[max*4+(8*4)];
+}
+GLFloatBuffer::~GLFloatBuffer()
+{
+    if (colors) delete [] colors;
+    if (buffer) delete [] buffer;
+}
+
+void GLFloatBuffer::add(GLfloat x, GLfloat y,QColor & color)
+{
+    if (m_cnt<m_max+2) {
+        mutex.lock();
+        buffer[m_cnt++]=x;
+        buffer[m_cnt++]=y;
+        colors[m_colcnt++]=color.red();
+        colors[m_colcnt++]=color.green();
+        colors[m_colcnt++]=color.blue();
+        colors[m_colcnt++]=color.alpha();
+        mutex.unlock();
+    } else {
+        qDebug() << "GLBuffer overflow";
+    }
+}
+void GLFloatBuffer::add(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,QColor & color)
+{
+    if (m_cnt<m_max+4) {
+        qDebug() << "GLFloatBuffer overflow";
+        return;
+    }
+    mutex.lock();
+    buffer[m_cnt++]=x1;
+    buffer[m_cnt++]=y1;
+    buffer[m_cnt++]=x2;
+    buffer[m_cnt++]=y2;
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+
+    mutex.unlock();
+}
+void GLFloatBuffer::add(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4,QColor & color) // add with vertex colors
+{
+    if (m_cnt>=m_max+8) {
+        qDebug() << "GLFloatBuffer overflow";
+        return;
+    }
+    mutex.lock();
+    buffer[m_cnt++]=x1;
+    buffer[m_cnt++]=y1;
+    buffer[m_cnt++]=x2;
+    buffer[m_cnt++]=y2;
+    buffer[m_cnt++]=x3;
+    buffer[m_cnt++]=y3;
+    buffer[m_cnt++]=x4;
+    buffer[m_cnt++]=y4;
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    mutex.unlock();
+}
+void GLFloatBuffer::quadGrLR(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4,QColor & color, QColor & color2) // add with vertex colors
+{
+    if (m_cnt>=m_max+8) {
+        qDebug() << "GLFloatBuffer overflow";
+        return;
+    }
+    mutex.lock();
+    buffer[m_cnt++]=x1;
+    buffer[m_cnt++]=y1;
+    buffer[m_cnt++]=x2;
+    buffer[m_cnt++]=y2;
+    buffer[m_cnt++]=x3;
+    buffer[m_cnt++]=y3;
+    buffer[m_cnt++]=x4;
+    buffer[m_cnt++]=y4;
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+
+    colors[m_colcnt++]=color2.red();
+    colors[m_colcnt++]=color2.green();
+    colors[m_colcnt++]=color2.blue();
+    colors[m_colcnt++]=color2.alpha();
+    colors[m_colcnt++]=color2.red();
+    colors[m_colcnt++]=color2.green();
+    colors[m_colcnt++]=color2.blue();
+    colors[m_colcnt++]=color2.alpha();
+    mutex.unlock();
+}
+void GLFloatBuffer::quadGrTB(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4,QColor & color, QColor & color2)
+{
+    if (m_cnt>=m_max+8) {
+        qDebug() << "GLFloatBuffer overflow";
+        return;
+    }
+    mutex.lock();
+    buffer[m_cnt++]=x1;
+    buffer[m_cnt++]=y1;
+    buffer[m_cnt++]=x3;
+    buffer[m_cnt++]=y3;
+    buffer[m_cnt++]=x2;
+    buffer[m_cnt++]=y2;
+    buffer[m_cnt++]=x4;
+    buffer[m_cnt++]=y4;
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+    colors[m_colcnt++]=color.red();
+    colors[m_colcnt++]=color.green();
+    colors[m_colcnt++]=color.blue();
+    colors[m_colcnt++]=color.alpha();
+
+    colors[m_colcnt++]=color2.red();
+    colors[m_colcnt++]=color2.green();
+    colors[m_colcnt++]=color2.blue();
+    colors[m_colcnt++]=color2.alpha();
+    colors[m_colcnt++]=color2.red();
+    colors[m_colcnt++]=color2.green();
+    colors[m_colcnt++]=color2.blue();
+    colors[m_colcnt++]=color2.alpha();
+    mutex.unlock();
+}
+
+void GLFloatBuffer::draw()
+{
+    if (m_cnt<=0) return;
+
+    bool antialias=m_forceantialias || (pref["UseAntiAliasing"].toBool() && m_antialias);
+    float size=m_size;
+    if (antialias) {
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        if (m_type==GL_LINES || m_type==GL_LINE_LOOP) {
+            glEnable(GL_LINE_SMOOTH);
+            glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
+            size+=0.5;
+        } else if (m_type==GL_POLYGON) {
+            glEnable(GL_POLYGON_SMOOTH);
+            glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST);
+        }
+    }
+    if (m_type==GL_LINES || m_type==GL_LINE_LOOP) {
+        glLineWidth(size);
+    } else if (m_type==GL_POINTS) {
+        glPointSize(size);
+    } else if (m_type==GL_POLYGON) {
+        glPolygonMode(GL_BACK,GL_FILL);
+    }
+    if (m_scissor) {
+        glScissor(s1,s2,s3,s4);
+        glEnable(GL_SCISSOR_TEST);
+    }
+
+    glVertexPointer(2, GL_FLOAT, 0, buffer);
+
+    glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
+
+    //glColor4ub(200,128,95,200);
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glEnableClientState(GL_COLOR_ARRAY);
+
+    glDrawArrays(m_type, 0, m_cnt >> 1);
+    glDisableClientState(GL_COLOR_ARRAY);
+    glDisableClientState(GL_VERTEX_ARRAY);
+
+    //qDebug() << "I Drawed" << m_cnt << "vertices";
+    m_cnt=0;
+    m_colcnt=0;
+    if (m_scissor) {
+        glDisable(GL_SCISSOR_TEST);
+        m_scissor=false;
+    }
+    if (m_type==GL_POLYGON) {
+        glPolygonMode(GL_BACK,GL_FILL);
+    }
+    if (antialias) {
+        if (m_type==GL_LINES || m_type==GL_LINE_LOOP) {
+            glDisable(GL_LINE_SMOOTH);
+        } else if (m_type==GL_POLYGON) {
+            glDisable(GL_POLYGON_SMOOTH);
+        }
+        glDisable(GL_BLEND);
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// gToolTip implementation
+
 gToolTip::gToolTip(gGraphView * graphview)
     :m_graphview(graphview)
 {
@@ -562,7 +751,7 @@ gGraph::gGraph(gGraphView *graphview,QString title,int height,short group) :
     m_selecting_area=m_blockzoom=false;
     m_lastx23=0;
 
-    m_quad=new GLBuffer(QColor(128,128,255,128),64,GL_QUADS);
+    m_quad=new GLShortBuffer(64,GL_QUADS);
     m_quad->forceAntiAlias(true);
     f_miny=f_maxy=0;
     m_forceMinY=m_forceMaxY=false;
@@ -1198,15 +1387,15 @@ void gGraph::SetMaxY(EventDataType v)
 {
     rmax_y=max_y=v;
 }
-GLBuffer * gGraph::lines()
+GLShortBuffer * gGraph::lines()
 {
     return m_graphview->lines;
 }
-GLBuffer * gGraph::backlines()
+GLShortBuffer * gGraph::backlines()
 {
     return m_graphview->backlines;
 }
-GLBuffer * gGraph::quads()
+GLShortBuffer * gGraph::quads()
 {
     return m_graphview->quads;
 }
@@ -1308,9 +1497,9 @@ gGraphView::gGraphView(QWidget *parent, gGraphView * shared) :
         //gt->start();
     }*/
 
-    lines=new GLBuffer(QColor(0,0,0,0),100000,GL_LINES); // big fat shared line list
-    backlines=new GLBuffer(QColor(0,0,0,0),10000,GL_LINES); // big fat shared line list
-    quads=new GLBuffer(QColor(0,0,0,0),1024,GL_QUADS); // big fat shared line list
+    lines=new GLShortBuffer(100000,GL_LINES); // big fat shared line list
+    backlines=new GLShortBuffer(10000,GL_LINES); // big fat shared line list
+    quads=new GLShortBuffer(1024,GL_QUADS); // big fat shared line list
     quads->forceAntiAlias(true);
     setFocusPolicy(Qt::StrongFocus);
     m_showsplitter=true;
diff --git a/Graphs/gGraphView.h b/Graphs/gGraphView.h
index e3668d6d..456ab228 100644
--- a/Graphs/gGraphView.h
+++ b/Graphs/gGraphView.h
@@ -31,22 +31,14 @@ class gGraphView;
 class gGraph;
 
 const int textque_max=512;
+
 class GLBuffer
 {
 public:
-    GLBuffer(QColor color,int max=2048,int type=GL_LINES);
-    ~GLBuffer();
-    void add(GLshort s);
-    void add(GLshort x, GLshort y);
-    void add(GLshort x1, GLshort y1, GLshort x2, GLshort y2);
-
-    void add(GLshort x, GLshort y,QColor & col);    // add with vertex color
-    void add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,QColor & col); // add with vertex colors
-    void add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,GLshort x3, GLshort y3, GLshort x4, GLshort y4,QColor & col); // add with vertex colors
-
+    GLBuffer(int max=2048,int type=GL_LINES);
+    virtual ~GLBuffer();
     void scissor(GLshort x1, GLshort y1, GLshort x2, GLshort y2) { s1=x1; s2=y1; s3=x2; s4=y2; m_scissor=true; }
-    void draw();
-    inline GLshort & operator [](int i) { return buffer[i]; }
+    virtual void draw(){}
     void reset() { m_cnt=0; }
     int max() { return m_max; }
     int cnt() { return m_cnt; }
@@ -54,11 +46,7 @@ public:
     void setSize(float f) { m_size=f; }
     void setAntiAlias(bool b) { m_antialias=b; }
     void forceAntiAlias(bool b) { m_forceantialias=b; }
-    void setColor(QColor color) { m_color=color; }
 protected:
-    QColor m_color;
-    GLshort * buffer;
-    GLubyte * colors;
     int m_max;
     int m_type;     // type (GL_LINES, GL_QUADS, etc)
     int m_cnt;      // cnt
@@ -71,6 +59,45 @@ protected:
     QMutex mutex;
 };
 
+class GLShortBuffer:public GLBuffer
+{
+public:
+    GLShortBuffer(int max=2048,int type=GL_LINES);
+    virtual ~GLShortBuffer();
+    //void add(GLshort s);
+    //void add(GLshort x, GLshort y);
+    //void add(GLshort x1, GLshort y1, GLshort x2, GLshort y2);
+
+    void add(GLshort x, GLshort y,QColor & col);    // add with vertex color
+    void add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,QColor & col); // add with vertex colors
+    void add(GLshort x1, GLshort y1, GLshort x2, GLshort y2,GLshort x3, GLshort y3, GLshort x4, GLshort y4,QColor & col); // add with vertex colors
+
+    virtual void draw();
+
+    //inline GLshort & operator [](int i) { return buffer[i]; }
+protected:
+    GLshort * buffer;
+    GLubyte * colors;
+};
+
+class GLFloatBuffer:public GLBuffer
+{
+public:
+    GLFloatBuffer(int max=2048,int type=GL_LINES);
+    virtual ~GLFloatBuffer();
+
+    void add(GLfloat x, GLfloat y,QColor & col);    // add with vertex color
+    void add(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,QColor & col); // add with vertex colors
+    void add(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4,QColor & col); // add with vertex colors
+    void quadGrTB(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4,QColor & col,QColor & col2); // add with vertex colors
+    void quadGrLR(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4,QColor & col,QColor & col2); // add with vertex colors
+
+    virtual void draw();
+protected:
+    GLfloat * buffer;
+    GLubyte * colors;
+};
+
 struct TextQue
 {
     short x,y;
@@ -288,9 +315,9 @@ public:
         m_margintop=top; m_marginbottom=bottom;
     }
 
-    GLBuffer * lines();
-    GLBuffer * backlines();
-    GLBuffer * quads();
+    GLShortBuffer * lines();
+    GLShortBuffer * backlines();
+    GLShortBuffer * quads();
     short m_marginleft, m_marginright, m_margintop, m_marginbottom;
     short left,right,top,bottom; // dirty magin hacks..
 
@@ -375,7 +402,7 @@ public:
     void setDay(Day * day);
     QSemaphore * masterlock;
     bool useThreads() { return m_idealthreads>1; }
-    GLBuffer * lines, * backlines, *quads;
+    GLShortBuffer * lines, * backlines, *quads;
 
     void TrashGraphs();
     gGraph * popGraph();
diff --git a/Graphs/gLineChart.cpp b/Graphs/gLineChart.cpp
index 4c98f1b3..9699afd4 100644
--- a/Graphs/gLineChart.cpp
+++ b/Graphs/gLineChart.cpp
@@ -16,7 +16,7 @@ gLineChart::gLineChart(ChannelID code,QColor col,bool square_plot, bool disable_
 {
     m_line_color=col;
     m_report_empty=false;
-    addGLBuf(lines=new GLBuffer(col,100000,GL_LINES));
+    addGLBuf(lines=new GLShortBuffer(100000,GL_LINES));
 
     lines->setAntiAlias(true);
 }
@@ -107,7 +107,7 @@ void gLineChart::paint(gGraph & w,int left, int top, int width, int height)
     int minz,maxz;
 
     // Draw bounding box
-    GLBuffer *outlines=w.lines();
+    GLShortBuffer *outlines=w.lines();
     QColor blk=Qt::black;
     outlines->add(left, top, left, top+height, blk);
     outlines->add(left, top+height, left+width,top+height, blk);
diff --git a/Graphs/gLineChart.h b/Graphs/gLineChart.h
index 8bbbbfa8..0e2ed5bf 100644
--- a/Graphs/gLineChart.h
+++ b/Graphs/gLineChart.h
@@ -36,8 +36,8 @@ protected:
         bool m_square_plot;
         bool m_disable_accel;
         QColor m_line_color;
-        GLBuffer * lines;
-        GLBuffer * outlines;
+        GLShortBuffer * lines;
+        GLShortBuffer * outlines;
         static const int max_drawlist_size=4096;
         QPoint m_drawlist[max_drawlist_size];
         int subtract_offset;
diff --git a/Graphs/gLineOverlay.cpp b/Graphs/gLineOverlay.cpp
index 6abdceb9..bfa052b9 100644
--- a/Graphs/gLineOverlay.cpp
+++ b/Graphs/gLineOverlay.cpp
@@ -11,9 +11,9 @@
 gLineOverlayBar::gLineOverlayBar(ChannelID code,QColor color,QString label,FlagType flt)
 :Layer(code),m_flag_color(color),m_label(label),m_flt(flt)
 {
-    addGLBuf(points=new GLBuffer(color,1024,GL_POINTS));
+    addGLBuf(points=new GLShortBuffer(1024,GL_POINTS));
     points->setSize(4);
-    addGLBuf(quads=new GLBuffer(color,2048,GL_QUADS));
+    addGLBuf(quads=new GLShortBuffer(2048,GL_QUADS));
     //addGLBuf(lines=new GLBuffer(color,1024,GL_LINES));
     points->setAntiAlias(true);
     quads->setAntiAlias(true);
@@ -83,7 +83,7 @@ void gLineOverlayBar::paint(gGraph & w, int left, int topp, int width, int heigh
             } else if (m_flt==FT_Dot) {
                 if ((pref["AlwaysShowOverlayBars"].toInt()==0) || (xx<3600000)) {
                     // show the fat dots in the middle
-                    points->add(x1,double(height)/double(yy)*double(-20-w.min_y)+topp);
+                    points->add(x1,double(height)/double(yy)*double(-20-w.min_y)+topp,m_flag_color);
                     if (points->full()) { verts_exceeded=true; break; }
                 } else {
                     // thin lines down the bottom
@@ -96,7 +96,7 @@ void gLineOverlayBar::paint(gGraph & w, int left, int topp, int width, int heigh
                 if ((pref["AlwaysShowOverlayBars"].toInt()==0) || (xx<3600000)) {
                     z=top;
 
-                    points->add(x1,top);
+                    points->add(x1,top,m_flag_color);
                     lines->add(x1,top,x1,bottom,m_flag_color);
                     if (points->full()) { verts_exceeded=true; break; }
                } else {
diff --git a/Graphs/gLineOverlay.h b/Graphs/gLineOverlay.h
index 1cd6880d..2a01fb1c 100644
--- a/Graphs/gLineOverlay.h
+++ b/Graphs/gLineOverlay.h
@@ -24,7 +24,7 @@ class gLineOverlayBar:public Layer
         QString m_label;
         FlagType m_flt;
 
-        GLBuffer *points,*quads, *lines;
+        GLShortBuffer *points,*quads, *lines;
 };
 
 #endif // GLINEOVERLAY_H
diff --git a/Graphs/gSegmentChart.cpp b/Graphs/gSegmentChart.cpp
index 4a51cd5e..ac4c9489 100644
--- a/Graphs/gSegmentChart.cpp
+++ b/Graphs/gSegmentChart.cpp
@@ -11,11 +11,10 @@
 gSegmentChart::gSegmentChart(GraphSegmentType type,QColor gradient_color,QColor outline_color)
 :Layer("EmptyChannel"),m_graph_type(type),m_gradient_color(gradient_color),m_outline_color(outline_color)
 {
-   // m_gradient_color=QColor(200,200,200);
     m_empty=true;
-    addGLBuf(poly=new GLBuffer(gradient_color,4000,GL_POLYGON));
-    addGLBuf(lines=new GLBuffer(outline_color,4000,GL_LINE_LOOP));
-    lines->setSize(1.5);
+    addGLBuf(poly=new GLFloatBuffer(4000,GL_POLYGON));
+    addGLBuf(lines=new GLFloatBuffer(4000,GL_LINE_LOOP));
+    lines->setSize(1);
     poly->forceAntiAlias(false);
     lines->forceAntiAlias(true);
     lines->setAntiAlias(true);
@@ -99,8 +98,8 @@ void gSegmentChart::paint(gGraph & w,int left, int top, int width, int height)
     bool line_first=true;
     int line_last;
 
-    GLBuffer *quads=w.quads();
-    GLBuffer *lines2=w.lines();
+    GLShortBuffer *quads=w.quads();
+    GLShortBuffer *lines2=w.lines();
     for (unsigned m=0;m<size;m++) {
         data=m_values[m];
         QColor & col=schema::channel[m_codes[m % m_colors.size()]].defaultColor();
@@ -158,8 +157,8 @@ void gSegmentChart::paint(gGraph & w,int left, int top, int width, int height)
             quads->add(xp,start_py,xp+bw,start_py,m_gradient_color);
             quads->add(xp+bw,start_py+height,xp,start_py+height,col);
 
-            lines->add(xp,start_py,xp+bw,start_py,m_outline_color);
-            lines->add(xp+bw,start_py+height,xp,start_py+height,m_outline_color);
+            lines2->add(xp,start_py,xp+bw,start_py,m_outline_color);
+            lines2->add(xp+bw,start_py+height,xp,start_py+height,m_outline_color);
 
             if (!m_names[m].isEmpty()) {
                 int px,py;
diff --git a/Graphs/gSegmentChart.h b/Graphs/gSegmentChart.h
index 8f89482f..f8d16e45 100644
--- a/Graphs/gSegmentChart.h
+++ b/Graphs/gSegmentChart.h
@@ -32,7 +32,7 @@ protected:
     QColor m_gradient_color;
     QColor m_outline_color;
     bool m_empty;
-    GLBuffer *poly,*lines;
+    GLFloatBuffer *poly,*lines;
 };
 
 class gTAPGraph:public gSegmentChart
diff --git a/Graphs/gSummaryChart.cpp b/Graphs/gSummaryChart.cpp
index 7b698ed0..b16a01c4 100644
--- a/Graphs/gSummaryChart.cpp
+++ b/Graphs/gSummaryChart.cpp
@@ -15,8 +15,8 @@ SummaryChart::SummaryChart(Profile *p,QString label,GraphType type)
 :Layer(""),m_profile(p),m_label(label),m_graphtype(type)
 {
     QColor color=Qt::black;
-    addGLBuf(quads=new GLBuffer(color,20000,GL_QUADS));
-    addGLBuf(lines=new GLBuffer(color,20000,GL_LINES));
+    addGLBuf(quads=new GLShortBuffer(20000,GL_QUADS));
+    addGLBuf(lines=new GLShortBuffer(20000,GL_LINES));
     quads->forceAntiAlias(true);
     lines->setSize(2);
     lines->forceAntiAlias(false);
@@ -152,7 +152,7 @@ void SummaryChart::paint(gGraph & w,int left, int top, int width, int height)
     if (!m_visible) return;
 
     rtop=top;
-    GLBuffer *outlines=w.lines();
+    GLShortBuffer *outlines=w.lines();
     QColor blk=Qt::black;
     outlines->add(left, top, left, top+height, blk);
     outlines->add(left, top+height, left+width,top+height, blk);
@@ -294,10 +294,8 @@ void SummaryChart::paint(gGraph & w,int left, int top, int width, int height)
                 if (m_graphtype==GT_BAR) {
                     QColor col2=brighten(col);
 
-                    quads->add(x1,py,col);
-                    quads->add(x1,py-h,col);
-                    quads->add(x2,py-h,col2);
-                    quads->add(x2,py,col2);
+                    quads->add(x1,py,x1,py-h,col);
+                    quads->add(x2,py-h,x2,py,col2);
                     if (barw>2) {
                         outlines->add(x1,py,x1,py-h,blk);
                         outlines->add(x1,py-h,x2,py-h,blk);
diff --git a/Graphs/gSummaryChart.h b/Graphs/gSummaryChart.h
index deca68de..21277bcd 100644
--- a/Graphs/gSummaryChart.h
+++ b/Graphs/gSummaryChart.h
@@ -35,7 +35,7 @@ class SummaryChart:public Layer
         QHash<int,Day *> m_days;
 
         Profile * m_profile;
-        GLBuffer *quads,*lines;
+        GLShortBuffer *quads,*lines;
         bool m_empty;
         int m_fday;
         QString m_label;
diff --git a/Graphs/gXAxis.cpp b/Graphs/gXAxis.cpp
index ec4e684e..20be523c 100644
--- a/Graphs/gXAxis.cpp
+++ b/Graphs/gXAxis.cpp
@@ -9,7 +9,7 @@
 #include "gXAxis.h"
 
 const quint64 divisors[]={
-    15552000000LL, 7776000000LL, 5184000000LL, 2419200000L, 1814400000L, 1209600000L, 604800000L, 259200000L,
+    15552000000ULL, 7776000000ULL, 5184000000ULL, 2419200000ULL, 1814400000ULL, 1209600000L, 604800000L, 259200000L,
     172800000L, 86400000,2880000,14400000,7200000,3600000,2700000,
     1800000,1200000,900000,600000,300000,120000,60000,45000,30000,
     20000,15000,10000,5000,2000,1000,100,50,10
@@ -133,7 +133,7 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
     }
 
     QColor linecol=Qt::black;
-    GLBuffer *lines=w.backlines();
+    GLShortBuffer *lines=w.backlines();
 
 
     int utcoff=m_utcfix ? tz_hours : 0;
diff --git a/Graphs/gYAxis.h b/Graphs/gYAxis.h
index 31b7ae53..924b3358 100644
--- a/Graphs/gYAxis.h
+++ b/Graphs/gYAxis.h
@@ -33,7 +33,7 @@ protected:
     bool m_show_minor_lines;
     QColor m_major_color;
     QColor m_minor_color;
-    GLBuffer * lines;
+    GLShortBuffer * lines;
 };
 
 class gYAxis:public Layer
@@ -65,7 +65,7 @@ class gYAxis:public Layer
 
         QColor m_line_color;
         QColor m_text_color;
-        GLBuffer * lines;
+        GLShortBuffer * lines;
         virtual bool mouseMoveEvent(QMouseEvent * event);
 
 };