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Sourcecode: cairo-dock-plugins version File versions  Download package

rendering-3D-plane.c

/**
* This file is a part of the Cairo-Dock project
*
* Copyright : (C) see the 'copyright' file.
* E-mail    : see the 'copyright' file.
*
* 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 3
* 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.
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <math.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include <gtk/gtk.h>

#include <cairo.h>

#include "rendering-commons.h"
#include "rendering-3D-plane.h"

extern int iVanishingPointY;

extern CDSpeparatorType my_iDrawSeparator3D;
extern double my_fSeparatorColor[4];

extern cairo_surface_t *my_pFlatSeparatorSurface[2];
extern GLuint my_iFlatSeparatorTexture;

#define _define_parameters(hi, h0, H, l, r, gamma, h, w, dw)\
      double hi = myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin;\
      double h0max = (1 + g_fAmplitude) * pDock->iMaxIconHeight/** * pDock->container.fRatio*/ + MAX (myLabels.iLabelSize, myBackground.iFrameMargin + myBackground.iDockLineWidth);\
      double h0 = pDock->iMaxIconHeight/** * pDock->container.fRatio*/;\
      double H = iVanishingPointY;\
      double l = myBackground.iDockLineWidth;\
      double r = MIN (myBackground.iDockRadius, (hi + h0) / 2);\
      double gamma = 0, h, w, dw = 0

void cd_rendering_calculate_max_dock_size_3D_plane (CairoDock *pDock)
{
      pDock->pFirstDrawnElement = cairo_dock_calculate_icons_positions_at_rest_linear (pDock->icons, pDock->fFlatDockWidth, pDock->iScrollOffset);
      
      //pDock->iMaxDockHeight = (int) ((1 + g_fAmplitude) * pDock->iMaxIconHeight + myIcons.fReflectSize * pDock->container.fRatio) + myLabels.iLabelSize + myBackground.iDockLineWidth + myBackground.iFrameMargin;
      
      _define_parameters (hi, h0, H, l, r, gamma, h, w, dw);
      pDock->iMaxDockHeight = (int) (hi + h0max + l);
      // 1ere estimation.
      // w
      w = ceil (cairo_dock_calculate_max_dock_width (pDock, pDock->pFirstDrawnElement, pDock->fFlatDockWidth, 1., 2 * dw));  // pDock->iMaxDockWidth
      // -> gamma
      gamma = w / 2 / H;
      // -> h
      h = hi + h0 / (1 + gamma);  // en fait, sqrt (1 + gamma * gamma), mais on simplifie pour diminuer l'ordre de 2. pDock->iDecorationsHeight
      // -> dw
      dw = h * gamma + 0*r + (l+(r==0)*2)*sqrt(1+gamma*gamma);  // en fait, h*gamma + r*(1-sin)/cos, or (1-sin)/cos <= 1, on majore pour simplifier. on aurait r + gamma * (h - 2 * r) si on utilisait des cercles au lieu de courbes de Bezier.
      
      r = MIN (myBackground.iDockRadius, h / 2);
      dw = r + gamma * (h - r) + (l+(r==0)*2)*sqrt(1+gamma*gamma);  // h-2r si on utilisait des cercles au lieu de courbes de Bezier.
      //g_print ("r:%.1f, h:%.1f => dw=%.1f (%.1f)\n", r, h, dw, h * gamma + 0*r + (l+(r==0)*2)*sqrt(1+gamma*gamma));
      
      /*double Ws = w+2*dw;
      double W = Ws - 2 * (r + (l+(r==0)*2)*sqrt(1+gamma*gamma));
      double a = H + hi;
      double b = H + hi + h0 - W / 2;
      double c = - W / 2;
      double g = (-b + sqrt (b * b - 4 * a * c)) / 2  / a;
      g_print ("gamma : %f (=) %f\n", gamma, g);*/
      
      double Ws = cairo_dock_get_max_authorized_dock_width (pDock);
      if (cairo_dock_is_extended_dock (pDock) && w + 2 * dw < Ws)  // alors on etend.
      {
            double extra = Ws - w;
            pDock->iMaxDockWidth = ceil (cairo_dock_calculate_max_dock_width (pDock, pDock->pFirstDrawnElement, pDock->fFlatDockWidth, 1., extra));  // on pourra optimiser, ce qui nous interesse ici c'est les fXMin/fXMax.
            double W = Ws - 2 * (r + (l+(r==0)*2)*sqrt(1+gamma*gamma));
            double a = H + hi;
            double b = H + hi + h0 - W / 2;
            double c = - W / 2;
            gamma = (-b + sqrt (b * b - 4 * a * c)) / 2  / a;
            //g_print ("mode etendu : pDock->iMaxDockWidth : %d, gamma = %f\n", pDock->iMaxDockWidth, gamma);
            h = hi + h0 / (1 + gamma);
      }
      else  // rien d'autre a faire
      {
            pDock->iMaxDockWidth = ceil (cairo_dock_calculate_max_dock_width (pDock, pDock->pFirstDrawnElement, pDock->fFlatDockWidth, 1., 2 * dw));  // on pourra optimiser, ce qui nous interesse ici c'est les fXMin/fXMax.
      }
      pDock->iDecorationsHeight = h;
      //g_print ("h : %.2f -> %d\n", h, pDock->iDecorationsHeight);
      
      pDock->iDecorationsWidth = pDock->iMaxDockWidth;
      
      // taille min.
      pDock->iMinDockHeight = myBackground.iDockLineWidth + myBackground.iFrameMargin + myIcons.fReflectSize * pDock->container.fRatio + pDock->iMaxIconHeight * pDock->container.fRatio;
      
      double gamma_min = pDock->fFlatDockWidth / 2 / H;
      double dw_min = h * gamma_min + r + (l+(r==0)*2)*sqrt(1+gamma_min*gamma_min);
      //cairo_dock_calculate_extra_width_for_trapeze (pDock->iDecorationsHeight, fInclination, myBackground.iDockRadius, myBackground.iDockLineWidth);
      
      // on charge les separateurs plat.
      //g_print ("%d / %d\n", my_iDrawSeparator3D, myIcons.iSeparatorType);
      if (my_iDrawSeparator3D != myIcons.iSeparatorType || my_fSeparatorColor[0] != myIcons.fSeparatorColor[0] || my_fSeparatorColor[1] != myIcons.fSeparatorColor[1] || my_fSeparatorColor[2] != myIcons.fSeparatorColor[2] || my_fSeparatorColor[3] != myIcons.fSeparatorColor[3])
      {
            my_iDrawSeparator3D = myIcons.iSeparatorType;
            memcpy (my_fSeparatorColor, myIcons.fSeparatorColor, 4*sizeof(double));
            if (myIcons.iSeparatorType == CD_FLAT_SEPARATOR)
            {
                  cd_rendering_load_flat_separator (CAIRO_CONTAINER (g_pMainDock));
            }
      }
      
      pDock->iMinDockWidth = pDock->fFlatDockWidth;
}

void cd_rendering_calculate_construction_parameters_3D_plane (Icon *icon, int iWidth, int iHeight, int iMaxDockWidth, double fReflectionOffsetY)
{
      icon->fDrawX = icon->fX;
      icon->fDrawY = icon->fY + fReflectionOffsetY;
      icon->fWidthFactor = 1.;
      icon->fHeightFactor = 1.;
      ///icon->fDeltaYReflection = 0.;
      icon->fOrientation = 0.;
      //if (icon->fDrawX >= 0 && icon->fDrawX + icon->fWidth * icon->fScale <= iWidth)
      {
            icon->fAlpha = 1;
      }
      /*else
      {
            icon->fAlpha = .25;
      }*/
}


static void cd_rendering_make_3D_separator (Icon *icon, cairo_t *pCairoContext, CairoDock *pDock, gboolean bIncludeEdges, gboolean bBackGround)
{
      gboolean bDirectionUp = pDock->container.bDirectionUp;
      gboolean bIsHorizontal = pDock->container.bIsHorizontal;
      bDirectionUp = TRUE;
      bIsHorizontal = TRUE;
      double hi = myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin;
      hi = (pDock->container.bDirectionUp ? pDock->container.iHeight - (icon->fDrawY + icon->fHeight * icon->fScale) : icon->fDrawY);
      double fLeftInclination = (icon->fDrawX - pDock->container.iWidth / 2) / iVanishingPointY;
      double fRightInclination = (icon->fDrawX + icon->fWidth * icon->fScale - pDock->container.iWidth / 2) / iVanishingPointY;
      
      double fHeight, fBigWidth, fLittleWidth;
      if (bIncludeEdges)
      {
            fHeight = (bBackGround ? pDock->iDecorationsHeight - hi : hi) + myBackground.iDockLineWidth;
            fBigWidth = fabs (fRightInclination - fLeftInclination) * (bBackGround ? iVanishingPointY : iVanishingPointY + fHeight);
            fLittleWidth = fabs (fRightInclination - fLeftInclination) * (bBackGround ? iVanishingPointY - fHeight : iVanishingPointY);
      }
      else
      {
            fHeight = pDock->iDecorationsHeight - myBackground.iDockLineWidth;
            fBigWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + hi);
            fLittleWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + hi - fHeight);
      }
      double fDeltaXLeft = fHeight * fLeftInclination;
      double fDeltaXRight = fHeight * fRightInclination;
      //g_print ("fBigWidth : %.2f ; fLittleWidth : %.2f\n", fBigWidth, fLittleWidth);
      
      int sens;
      double fDockOffsetX, fDockOffsetY;
      if (bDirectionUp)
      {
            sens = 1;
            if (bIncludeEdges)
                  fDockOffsetY = pDock->container.iHeight - fHeight - (bBackGround ? myBackground.iDockLineWidth + hi : 0);
            else
                  fDockOffsetY = pDock->container.iHeight - fHeight - myBackground.iDockLineWidth;
      }
      else
      {
            sens = -1;
            if (bIncludeEdges)
                  fDockOffsetY = fHeight + (bBackGround ? myBackground.iDockLineWidth + hi : 0);
            else
                  fDockOffsetY = fHeight + myBackground.iDockLineWidth;
      }
      if (bIncludeEdges)
            fDockOffsetX = icon->fDrawX - (bBackGround ? fHeight * fLeftInclination : 0);
      else
            fDockOffsetX = icon->fDrawX - (fHeight - hi) * fLeftInclination;
      
      if (bIsHorizontal)
      {
            cairo_translate (pCairoContext, fDockOffsetX, fDockOffsetY);  // coin haut gauche.
            cairo_move_to (pCairoContext, 0, 0);  // coin haut gauche.
            
            cairo_rel_line_to (pCairoContext, fLittleWidth, 0);
            cairo_rel_line_to (pCairoContext, fDeltaXRight, sens * fHeight);
            cairo_rel_line_to (pCairoContext, - fBigWidth, 0);
            cairo_rel_line_to (pCairoContext, - fDeltaXLeft, - sens * fHeight);
            
            if (my_iDrawSeparator3D == CD_FLAT_SEPARATOR)
            {
                  if (! bDirectionUp)
                        cairo_scale (pCairoContext, 1, -1);
                  cairo_set_source_surface (pCairoContext, my_pFlatSeparatorSurface[CAIRO_DOCK_HORIZONTAL], MIN (0, (fHeight + hi) * fLeftInclination), 0);
            }
      }
      else
      {
            cairo_translate (pCairoContext, fDockOffsetY, fDockOffsetX);  // coin haut gauche.
            cairo_move_to (pCairoContext, 0, 0);  // coin haut gauche.
            
            cairo_rel_line_to (pCairoContext, 0, fLittleWidth);
            cairo_rel_line_to (pCairoContext, sens * fHeight, fDeltaXRight);
            cairo_rel_line_to (pCairoContext, 0, - fBigWidth);
            cairo_rel_line_to (pCairoContext, - sens * fHeight, - fDeltaXLeft);
            
            if (my_iDrawSeparator3D == CD_FLAT_SEPARATOR)
            {
                  if (! bDirectionUp)
                        cairo_scale (pCairoContext, -1, 1);
                  cairo_set_source_surface (pCairoContext, my_pFlatSeparatorSurface[CAIRO_DOCK_VERTICAL], 0, MIN (0, (fHeight + hi) * fLeftInclination));
            }
      }
}

static void cd_rendering_draw_3D_separator_edge (Icon *icon, cairo_t *pCairoContext, CairoDock *pDock, gboolean bBackGround)
{
      gboolean bDirectionUp = pDock->container.bDirectionUp;
      gboolean bIsHorizontal = pDock->container.bIsHorizontal;
      bDirectionUp = TRUE;
      bIsHorizontal = TRUE;
      double hi = myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin;
      hi = (pDock->container.bDirectionUp ? pDock->container.iHeight - (icon->fDrawY + icon->fHeight * icon->fScale) : icon->fDrawY);
      double fLeftInclination = (icon->fDrawX - pDock->container.iWidth / 2) / iVanishingPointY;
      double fRightInclination = (icon->fDrawX + icon->fWidth * icon->fScale - pDock->container.iWidth / 2) / iVanishingPointY;
      
      double fHeight, fBigWidth, fLittleWidth;
      fHeight = (bBackGround ? pDock->iDecorationsHeight - hi - 0.5*myBackground.iDockLineWidth : hi + 1.5*myBackground.iDockLineWidth);
      fBigWidth = fabs (fRightInclination - fLeftInclination) * (bBackGround ? iVanishingPointY : iVanishingPointY + fHeight);
      fLittleWidth = fabs (fRightInclination - fLeftInclination) * (bBackGround ? iVanishingPointY - fHeight : iVanishingPointY);
      
      double fDeltaXLeft = fHeight * fLeftInclination;
      double fDeltaXRight = fHeight * fRightInclination;
      //g_print ("fBigWidth : %.2f ; fLittleWidth : %.2f\n", fBigWidth, fLittleWidth);
      
      int sens;
      double fDockOffsetX, fDockOffsetY;
      if (bDirectionUp)
      {
            sens = 1;
            fDockOffsetY =  (bBackGround ? 0.5*myBackground.iDockLineWidth : - 1.*myBackground.iDockLineWidth);
      }
      else
      {
            sens = -1;
            fDockOffsetY =  (bBackGround ? - 0.5*myBackground.iDockLineWidth : 1.*myBackground.iDockLineWidth);
      }
      fDockOffsetX = (bBackGround ? .5*myBackground.iDockLineWidth * fLeftInclination + 1.*fLeftInclination : - 0.5 * myBackground.iDockLineWidth * fLeftInclination);
      //fDockOffsetX = -.5*myBackground.iDockLineWidth;
      
      if (bIsHorizontal)
      {
            cairo_translate (pCairoContext, fDockOffsetX, fDockOffsetY);  // coin haut droit.
            
            cairo_move_to (pCairoContext, fLittleWidth, 0);
            cairo_rel_line_to (pCairoContext, fDeltaXRight, sens * fHeight);
            
            cairo_move_to (pCairoContext, 0, 0);
            cairo_rel_line_to (pCairoContext, fDeltaXLeft, sens * fHeight);
      }
      else
      {
            cairo_translate (pCairoContext, fDockOffsetY, fDockOffsetX);  // coin haut droit.
            
            cairo_move_to (pCairoContext, 0, fLittleWidth);
            cairo_rel_line_to (pCairoContext, sens * fHeight, fDeltaXRight);
            
            cairo_move_to (pCairoContext, 0, 0);
            cairo_rel_line_to (pCairoContext, sens * fHeight, fDeltaXLeft);
      }
}


static void cd_rendering_draw_3D_separator (Icon *icon, cairo_t *pCairoContext, CairoDock *pDock, gboolean bHorizontal, gboolean bBackGround)
{
      if (pDock->container.bIsHorizontal)
      {
            if (! pDock->container.bDirectionUp)
            {
                  cairo_translate (pCairoContext, 0., pDock->container.iHeight);
                  cairo_scale (pCairoContext, 1., -1.);
            }
      }
      else
      {
            if (pDock->container.bDirectionUp)
            {
                  
            }
            else
            {
                  
            }
      }
      cd_rendering_make_3D_separator (icon, pCairoContext, pDock, (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR), bBackGround);
      
      if (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
      {
            cairo_set_operator (pCairoContext, CAIRO_OPERATOR_DEST_OUT);
            cairo_set_source_rgba (pCairoContext, 0.0, 0.0, 0.0, 1.0);
            cairo_fill (pCairoContext);
            
            if (myBackground.iDockLineWidth != 0)
            {
                  cd_rendering_draw_3D_separator_edge (icon, pCairoContext, pDock, bBackGround);
                  
                  cairo_set_operator (pCairoContext, CAIRO_OPERATOR_OVER);
                  cairo_set_line_width (pCairoContext, myBackground.iDockLineWidth);
                  cairo_set_source_rgba (pCairoContext, myBackground.fLineColor[0], myBackground.fLineColor[1], myBackground.fLineColor[2], myBackground.fLineColor[3]);
                  cairo_stroke (pCairoContext);
            }
      }
      else
      {
            cairo_fill (pCairoContext);
      }
}


void cd_rendering_render_3D_plane (cairo_t *pCairoContext, CairoDock *pDock)
{
      _define_parameters (hi, h0, H, l, r, gamma, h, w, dw);
      h = pDock->iDecorationsHeight;
      if (h < 2 * r)
            r = h / 2;
      
      //\____________________ On definit la position du cadre.
      double dx, dy;  // position du coin haut gauche du cadre.
      if (cairo_dock_is_extended_dock (pDock))  // mode panel etendu.
      {
            double Ws = pDock->container.iWidth;
            gamma = Ws / 2 / H;
            double W = Ws - 2 * (r + (l+(r==0)*2)*sqrt(1+gamma*gamma));
            double a = H + hi;
            double b = H + hi + h0 - W / 2;
            double c = - W / 2;
            gamma = (-b + sqrt (b * b - 4 * a * c)) / 2  / a;
            h = hi + h0 / (1 + gamma);
            //g_print ("h : %.2f (=) %d\n", h, pDock->iDecorationsHeight);
            w = 2 * H * gamma;
            dw = (Ws - w) / 2;
            //g_print ("dw : %.2f (=) %.2f\n", dw, h * gamma + r + (l+(r==0)*2)*sqrt(1+gamma*gamma));
            dx = dw;
      }
      else
      {
            w = cairo_dock_get_current_dock_width_linear (pDock);
            gamma = w / 2 / H;
            dw = h * gamma + r + (l+(r==0)*2)*sqrt(1+gamma*gamma);
            h = pDock->iDecorationsHeight;
            Icon *pFirstIcon = cairo_dock_get_first_drawn_icon (pDock);
            dx = (pFirstIcon != NULL ? pFirstIcon->fX - 0*myBackground.iFrameMargin : r);
      }
      
      int sens;
      if (pDock->container.bDirectionUp)
      {
            sens = 1;
            dy = pDock->container.iHeight - pDock->iDecorationsHeight - 1.5 * l;
      }
      else
      {
            sens = -1;
            dy = pDock->iDecorationsHeight + 1.5 * l;
      }
      
      //\____________________ On trace le cadre.
      cairo_save (pCairoContext);
      
      double fDeltaXTrapeze = cairo_dock_draw_frame (pCairoContext, r, l, w, pDock->iDecorationsHeight, dx, dy, sens, gamma, pDock->container.bIsHorizontal);
      
      //\____________________ On dessine les decorations dedans.
      dy = (pDock->container.bDirectionUp ? pDock->container.iHeight - pDock->iDecorationsHeight - l : l);
      cairo_dock_render_decorations_in_frame (pCairoContext, pDock, dy, dx-fDeltaXTrapeze, w+2*fDeltaXTrapeze);
      
      //\____________________ On dessine le cadre.
      if (l > 0)
      {
            cairo_set_line_width (pCairoContext, l);
            cairo_set_source_rgba (pCairoContext, myBackground.fLineColor[0], myBackground.fLineColor[1], myBackground.fLineColor[2], myBackground.fLineColor[3]);
            cairo_stroke (pCairoContext);
      }
      else
            cairo_new_path (pCairoContext);
      
      /// donner un effet d'epaisseur => chaud du slip avec les separateurs physiques !
      
      
      cairo_restore (pCairoContext);
      
      //\____________________ On dessine la ficelle qui les joint.
      if (myIcons.iStringLineWidth > 0)
            cairo_dock_draw_string (pCairoContext, pDock, myIcons.iStringLineWidth, FALSE, (my_iDrawSeparator3D == CD_FLAT_SEPARATOR || my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR));
      
      //\____________________ On dessine les icones et les etiquettes, en tenant compte de l'ordre pour dessiner celles en arriere-plan avant celles en avant-plan.
      GList *pFirstDrawnElement = cairo_dock_get_first_drawn_element_linear (pDock->icons);
      if (pFirstDrawnElement == NULL)
            return;
            
      double fDockMagnitude = cairo_dock_calculate_magnitude (pDock->iMagnitudeIndex);
      
      Icon *icon;
      GList *ic = pFirstDrawnElement;
      if (my_iDrawSeparator3D == CD_FLAT_SEPARATOR || my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
      {
            cairo_set_line_cap (pCairoContext, CAIRO_LINE_CAP_SQUARE);
            do
            {
                  icon = ic->data;
                  
                  if (icon->cFileName == NULL && CAIRO_DOCK_IS_SEPARATOR (icon))
                  {
                        cairo_save (pCairoContext);
                        cd_rendering_draw_3D_separator (icon, pCairoContext, pDock, pDock->container.bIsHorizontal, TRUE);
                        cairo_restore (pCairoContext);
                  }
                  
                  ic = cairo_dock_get_next_element (ic, pDock->icons);
            } while (ic != pFirstDrawnElement);
            
            do
            {
                  icon = ic->data;
                  
                  if (icon->cFileName != NULL || ! CAIRO_DOCK_IS_SEPARATOR (icon))
                  {
                        cairo_save (pCairoContext);
                        cairo_dock_render_one_icon (icon, pDock, pCairoContext, fDockMagnitude, TRUE);
                        cairo_restore (pCairoContext);
                  }
                  
                  ic = cairo_dock_get_next_element (ic, pDock->icons);
            } while (ic != pFirstDrawnElement);
            
            if (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
            {
                  do
                  {
                        icon = ic->data;
                        
                        if (icon->cFileName == NULL && CAIRO_DOCK_IS_SEPARATOR (icon))
                        {
                              cairo_save (pCairoContext);
                              cd_rendering_draw_3D_separator (icon, pCairoContext, pDock, pDock->container.bIsHorizontal, FALSE);
                              cairo_restore (pCairoContext);
                        }
                        
                        ic = cairo_dock_get_next_element (ic, pDock->icons);
                  } while (ic != pFirstDrawnElement);
            }
      }
      else
      {
            do
            {
                  icon = ic->data;
                  
                  cairo_save (pCairoContext);
                  cairo_dock_render_one_icon (icon, pDock, pCairoContext, fDockMagnitude, TRUE);
                  cairo_restore (pCairoContext);
                  
                  ic = cairo_dock_get_next_element (ic, pDock->icons);
            } while (ic != pFirstDrawnElement);
      }
}

static gboolean _cd_separator_is_impacted (Icon *icon, CairoDock *pDock, double fXMin, double fXMax, gboolean bBackGround, gboolean bIncludeEdges)
{
      double hi = myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin;
      hi = (pDock->container.bDirectionUp ? pDock->container.iHeight - (icon->fDrawY + icon->fHeight * icon->fScale) : icon->fDrawY);
      double fLeftInclination = fabs (icon->fDrawX - pDock->container.iWidth / 2) / iVanishingPointY;
      double fRightInclination = fabs (icon->fDrawX + icon->fWidth * icon->fScale - pDock->container.iWidth / 2) / iVanishingPointY;
      
      double fHeight, fBigWidth, fLittleWidth;
      if (bIncludeEdges)
      {
            fHeight = (bBackGround ? pDock->iDecorationsHeight - hi : hi) + (bIncludeEdges ? myBackground.iDockLineWidth : 0);
            fBigWidth = fabs (fRightInclination - fLeftInclination) * (bBackGround ? iVanishingPointY : iVanishingPointY + fHeight);
            fLittleWidth = fabs (fRightInclination - fLeftInclination) * (bBackGround ? iVanishingPointY - fHeight : iVanishingPointY);
      }
      else
      {
            fHeight = pDock->iDecorationsHeight;
            fBigWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + fHeight);
            fLittleWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY - fHeight);
      }
      double fDeltaXLeft = fHeight * fLeftInclination;
      double fDeltaXRight = fHeight * fRightInclination;
      double fDeltaX = MAX (fDeltaXLeft, fDeltaXRight);
      //g_print ("fBigWidth : %.2f ; fLittleWidth : %.2f\n", fBigWidth, fLittleWidth);
      
      int sens;
      double fDockOffsetX, fDockOffsetY;
      if (pDock->container.bDirectionUp)
      {
            sens = 1;
            if (bIncludeEdges)
                  fDockOffsetY =  pDock->container.iHeight - fHeight - (bBackGround ? myBackground.iDockLineWidth + hi : 0);
            else
                  fDockOffsetY =  pDock->container.iHeight - fHeight;
      }
      else
      {
            sens = -1;
            if (bIncludeEdges)
                  fDockOffsetY = fHeight + (bBackGround ? myBackground.iDockLineWidth + hi : 0);
            else
                  fDockOffsetY = fHeight;
      }
      
      if (bIncludeEdges)
                  fDockOffsetX = icon->fDrawX - (bBackGround ? fHeight * fLeftInclination : 0);
            else
                  fDockOffsetX = icon->fDrawX - (fHeight - hi) * fLeftInclination;
      double fXLeft, fXRight;
      if (icon->fDrawX + icon->fWidth * icon->fScale / 2 > pDock->container.iWidth / 2)  // on est a droite.
      {
            if (bIncludeEdges)
            {
                  if (bBackGround)
                  {
                        fXLeft = icon->fDrawX - fHeight * fLeftInclination;
                        fXRight = icon->fDrawX + icon->fWidth * icon->fScale;
                  }
                  else
                  {
                        fXLeft = icon->fDrawX;
                        fXRight = icon->fDrawX + icon->fWidth * icon->fScale + fHeight * fRightInclination;
                  }
            }
            else
            {
                  fXLeft = icon->fDrawX - (fHeight - hi) * fLeftInclination;
                  fXRight = icon->fDrawX + icon->fWidth * icon->fScale + hi * fRightInclination;
            }
      }
      else  // a gauche.
      {
            if (bIncludeEdges)
            {
                  if (bBackGround)
                  {
                        fXLeft = icon->fDrawX;
                        fXRight = icon->fDrawX + icon->fWidth * icon->fScale + fHeight * fRightInclination;
                  }
                  else
                  {
                        fXLeft = icon->fDrawX - fHeight * fLeftInclination;
                        fXRight = icon->fDrawX + icon->fWidth * icon->fScale;
                  }
            }
            else
            {
                  fXLeft = icon->fDrawX - hi * fLeftInclination;
                  fXRight = icon->fDrawX + icon->fWidth * icon->fScale +(fHeight - hi) * fRightInclination;
            }
      }
      
      return (fXLeft <= fXMax && floor (fXRight) > fXMin);
}

void cd_rendering_render_optimized_3D_plane (cairo_t *pCairoContext, CairoDock *pDock, GdkRectangle *pArea)
{
      //g_print ("%s ((%d;%d) x (%d;%d) / (%dx%d))\n", __func__, pArea->x, pArea->y, pArea->width, pArea->height, pDock->container.iWidth, pDock->container.iHeight);
      double fLineWidth = myBackground.iDockLineWidth;
      double fMargin = myBackground.iFrameMargin;
      int iWidth = pDock->container.iWidth;
      int iHeight = pDock->container.iHeight;
      
      //\____________________ On dessine les decorations du fond sur la portion de fenetre.
      cairo_save (pCairoContext);
      
      double fDockOffsetX, fDockOffsetY;
      if (pDock->container.bIsHorizontal)
      {
            fDockOffsetX = pArea->x;
            fDockOffsetY = (pDock->container.bDirectionUp ? iHeight - pDock->iDecorationsHeight - fLineWidth : fLineWidth);
      }
      else
      {
            fDockOffsetX = (pDock->container.bDirectionUp ? iHeight - pDock->iDecorationsHeight - fLineWidth : fLineWidth);
            fDockOffsetY = pArea->y;
      }
      
      //cairo_move_to (pCairoContext, fDockOffsetX, fDockOffsetY);
      if (pDock->container.bIsHorizontal)
            cairo_rectangle (pCairoContext, fDockOffsetX, fDockOffsetY, pArea->width, pDock->iDecorationsHeight);
      else
            cairo_rectangle (pCairoContext, fDockOffsetX, fDockOffsetY, pDock->iDecorationsHeight, pArea->height);
      
      double fRadius = MIN (myBackground.iDockRadius, (pDock->iDecorationsHeight + myBackground.iDockLineWidth) / 2 - 1);
      double fDeltaXTrapeze=0.;
      double fOffsetX;
      if (cairo_dock_is_extended_dock (pDock))  // mode panel etendu.
      {
            fOffsetX = fRadius + fLineWidth / 2;
      }
      else
      {
            Icon *pFirstIcon = cairo_dock_get_first_drawn_icon (pDock);
            fOffsetX = (pFirstIcon != NULL ? pFirstIcon->fX - fMargin : fRadius + fLineWidth / 2);
      }
      double fDockWidth = cairo_dock_get_current_dock_width_linear (pDock);
      if (g_pDockBackgroundBuffer.pSurface != NULL)
      {
            double fInclinationOnHorizon = (fDockWidth / 2) / iVanishingPointY;
            double fRadius = myBackground.iDockRadius;
            if (2*fRadius > pDock->iDecorationsHeight + fLineWidth)
                  fRadius = (pDock->iDecorationsHeight + fLineWidth) / 2 - 1;
            double fDeltaXForLoop = fInclinationOnHorizon * (pDock->iDecorationsHeight + fLineWidth - (/**myBackground.bRoundedBottomCorner*/TRUE ? 2 : 1) * fRadius);
            
            double cosa = 1. / sqrt (1 + fInclinationOnHorizon * fInclinationOnHorizon);
            fDeltaXTrapeze = fDeltaXForLoop + fRadius * cosa;
            
            double sina = cosa * fInclinationOnHorizon;
            fDeltaXTrapeze = fInclinationOnHorizon * (pDock->iDecorationsHeight - (FALSE ? 2 : 1-sina) * fRadius) + fRadius * (FALSE ? 1 : cosa);
      }
      cairo_dock_render_decorations_in_frame (pCairoContext, pDock, pDock->container.bIsHorizontal ? fDockOffsetY : fDockOffsetX, fOffsetX-fDeltaXTrapeze, fDockWidth+2*fDeltaXTrapeze);
      
      
      //\____________________ On dessine la partie du cadre qui va bien.
      cairo_new_path (pCairoContext);
      
      if (pDock->container.bIsHorizontal)
      {
            cairo_set_line_width (pCairoContext, fLineWidth);
            cairo_move_to (pCairoContext, fDockOffsetX, fDockOffsetY - 0.5*fLineWidth);
            cairo_rel_line_to (pCairoContext, pArea->width, 0);
            cairo_set_source_rgba (pCairoContext, myBackground.fLineColor[0], myBackground.fLineColor[1], myBackground.fLineColor[2], myBackground.fLineColor[3]);
            cairo_stroke (pCairoContext);
            
            cairo_new_path (pCairoContext);
            cairo_move_to (pCairoContext, fDockOffsetX, (pDock->container.bDirectionUp ? iHeight - 0.5*fLineWidth : pDock->iDecorationsHeight + 1.5 * fLineWidth));
            cairo_rel_line_to (pCairoContext, pArea->width, 0);
      }
      else
      {
            cairo_move_to (pCairoContext, fDockOffsetX - .5*fLineWidth, fDockOffsetY);
            cairo_rel_line_to (pCairoContext, 0, pArea->height);
            cairo_set_line_width (pCairoContext, fLineWidth);
            cairo_set_source_rgba (pCairoContext, myBackground.fLineColor[0], myBackground.fLineColor[1], myBackground.fLineColor[2], myBackground.fLineColor[3]);
            cairo_stroke (pCairoContext);
            
            cairo_new_path (pCairoContext);
            cairo_move_to (pCairoContext, (pDock->container.bDirectionUp ? iHeight - fLineWidth / 2 : pDock->iDecorationsHeight + 1.5 * fLineWidth), fDockOffsetY);
            cairo_rel_line_to (pCairoContext, 0, pArea->height);
      }
      cairo_set_line_width (pCairoContext, fLineWidth);
      cairo_set_source_rgba (pCairoContext, myBackground.fLineColor[0], myBackground.fLineColor[1], myBackground.fLineColor[2], myBackground.fLineColor[3]);
      cairo_stroke (pCairoContext);
      
      cairo_restore (pCairoContext);
      
      //\____________________ On dessine les icones impactees.
      GList *pFirstDrawnElement = (pDock->pFirstDrawnElement != NULL ? pDock->pFirstDrawnElement : pDock->icons);
      if (pFirstDrawnElement != NULL)
      {
            double fXMin = (pDock->container.bIsHorizontal ? pArea->x : pArea->y), fXMax = (pDock->container.bIsHorizontal ? pArea->x + pArea->width : pArea->y + pArea->height);
            double fDockMagnitude = cairo_dock_calculate_magnitude (pDock->iMagnitudeIndex);
            double fXLeft, fXRight;
            Icon *icon;
            GList *ic = pFirstDrawnElement;
            
            if (my_iDrawSeparator3D == CD_FLAT_SEPARATOR || my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
            {
                  cairo_set_line_cap (pCairoContext, CAIRO_LINE_CAP_SQUARE);
                  do
                  {
                        icon = ic->data;
                        
                        if (CAIRO_DOCK_IS_SEPARATOR (icon) && icon->cFileName == NULL)
                        {
                              if (_cd_separator_is_impacted (icon, pDock, fXMin, fXMax, TRUE, (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)))
                              {
                                    cairo_save (pCairoContext);
                                    cd_rendering_draw_3D_separator (icon, pCairoContext, pDock, pDock->container.bIsHorizontal, TRUE);
                                    cairo_restore (pCairoContext);
                              }
                        }
                        
                        ic = cairo_dock_get_next_element (ic, pDock->icons);
                  } while (ic != pFirstDrawnElement);
                  
                  do
                  {
                        icon = ic->data;
                        if (! CAIRO_DOCK_IS_SEPARATOR (icon) || icon->cFileName != NULL)
                        {
                              fXLeft = icon->fDrawX + icon->fScale + 1;
                              fXRight = icon->fDrawX + (icon->fWidth - 1) * icon->fScale * icon->fWidthFactor - 1;
                              
                              if (fXLeft <= fXMax && floor (fXRight) > fXMin)
                              {
                                    //if (icon->fDrawX >= 0 && icon->fDrawX + icon->fWidth * icon->fScale <= pDock->container.iWidth)
                                          icon->fAlpha = 1;
                                    //else
                                    //    icon->fAlpha = .25;
                                    
                                    cairo_save (pCairoContext);
                                    cairo_dock_render_one_icon (icon, pDock, pCairoContext, fDockMagnitude, TRUE);
                                    cairo_restore (pCairoContext);
                              }
                        }
                        ic = cairo_dock_get_next_element (ic, pDock->icons);
                  } while (ic != pFirstDrawnElement);
                  
                  if (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
                  {
                        do
                        {
                              icon = ic->data;
                              
                              if (CAIRO_DOCK_IS_SEPARATOR (icon) && icon->cFileName == NULL)
                              {
                                    if (_cd_separator_is_impacted (icon, pDock, fXMin, fXMax, FALSE, (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)))
                                    {
                                          cairo_save (pCairoContext);
                                          cd_rendering_draw_3D_separator (icon, pCairoContext, pDock, pDock->container.bIsHorizontal, FALSE);
                                          cairo_restore (pCairoContext);
                                    }
                              }
                              
                              ic = cairo_dock_get_next_element (ic, pDock->icons);
                        } while (ic != pFirstDrawnElement);
                  }
            }
            else
            {
                  do
                  {
                        icon = ic->data;
                        fXLeft = icon->fDrawX + icon->fScale + 1;
                        fXRight = icon->fDrawX + (icon->fWidth - 1) * icon->fScale * icon->fWidthFactor - 1;
                        
                        if (fXLeft <= fXMax && floor (fXRight) > fXMin)
                        {
                              //if (icon->fDrawX >= 0 && icon->fDrawX + icon->fWidth * icon->fScale <= pDock->container.iWidth)
                                    icon->fAlpha = 1;
                              //else
                              //    icon->fAlpha = .25;
                              
                              cairo_save (pCairoContext);
                              cairo_dock_render_one_icon (icon, pDock, pCairoContext, fDockMagnitude, TRUE);
                              cairo_restore (pCairoContext);
                        }
                        ic = cairo_dock_get_next_element (ic, pDock->icons);
                  } while (ic != pFirstDrawnElement);
            }
      }
}


Icon *cd_rendering_calculate_icons_3D_plane (CairoDock *pDock)
{
      Icon *pPointedIcon = cairo_dock_apply_wave_effect (pDock);
      
      //\____________________ On calcule les position/etirements/alpha des icones.
      double fReflectionOffsetY = (pDock->container.bDirectionUp ? -1 : 1) * myIcons.fReflectSize * pDock->container.fRatio;
      Icon* icon;
      GList* ic;
      for (ic = pDock->icons; ic != NULL; ic = ic->next)
      {
            icon = ic->data;
            cd_rendering_calculate_construction_parameters_3D_plane (icon, pDock->container.iWidth, pDock->container.iHeight, pDock->iMaxDockWidth, fReflectionOffsetY);
      }
      
      cairo_dock_check_if_mouse_inside_linear (pDock);
      
      cairo_dock_check_can_drop_linear (pDock);
      
      return pPointedIcon;
}


void cd_rendering_render_3D_plane_opengl (CairoDock *pDock)
{
      //\____________________ On genere le cadre.
      _define_parameters (hi, h0, H, l, r, gamma, h, w, dw);
      h = pDock->iDecorationsHeight;
      if (h < 2 * r)
            r = h / 2;
      
      double dx, dy;
      if (cairo_dock_is_extended_dock (pDock))  // mode panel etendu.
      {
            double Ws = pDock->container.iWidth;
            double W = Ws - 2 * r;
            double a = H + hi;
            double b = H + hi + h0 - W / 2;
            double c = - W / 2;
            gamma = (-b + sqrt (b * b - 4 * a * c)) / 2  / a;
            h = hi + h0 / (1 + gamma);
            //g_print ("h : %.2f (=) %d\n", h, pDock->iDecorationsHeight);
            w = 2 * H * gamma;
            dw = (Ws - w) / 2;
            //g_print ("dw : %.2f (=) %.2f\n", dw, h * gamma + r + (l+(r==0)*2)*sqrt(1+gamma*gamma));
            dx = dw;
      }
      else
      {
            w = cairo_dock_get_current_dock_width_linear (pDock);
            gamma = w / 2 / H;
            dw = h * gamma + r + (l+(r==0)*2)*sqrt(1+gamma*gamma);
            h = pDock->iDecorationsHeight;
            Icon *pFirstIcon = cairo_dock_get_first_drawn_icon (pDock);
            dx = (pFirstIcon != NULL ? pFirstIcon->fX - myBackground.iFrameMargin : r);
      }
      
      //\____________________ On trace le cadre.
      int sens;
      if ((pDock->container.bDirectionUp && pDock->container.bIsHorizontal) || (!pDock->container.bDirectionUp && !pDock->container.bIsHorizontal))
      {
            sens = 1;
            //dy = pDock->container.iHeight - pDock->iDecorationsHeight - 1.5 * l;
            dy = pDock->iDecorationsHeight + 1.5*l;
      }
      else
      {
            sens = -1;
            //dy = pDock->iDecorationsHeight + 1.5 * l;
            dy = pDock->container.iHeight - .5 * l;
      }
      
      int iNbVertex;
      double fDeltaXTrapeze;
      GLfloat *pVertexTab = cairo_dock_generate_trapeze_path (w - (/**myBackground.bRoundedBottomCorner*/TRUE ? 0 : 2*l/gamma), h+l, r, /**myBackground.bRoundedBottomCorner*/TRUE, gamma, &fDeltaXTrapeze, &iNbVertex);
      
      if (! pDock->container.bIsHorizontal)
            dx = pDock->container.iWidth - dx + fDeltaXTrapeze;
      else
            dx = dx - fDeltaXTrapeze;
      
      //\____________________ On dessine les decorations dedans.
      //fDockOffsetY = (!pDock->container.bDirectionUp ? pDock->container.iHeight - pDock->iDecorationsHeight - fLineWidth : fLineWidth);
      glPushMatrix ();
      cairo_dock_draw_frame_background_opengl (g_pDockBackgroundBuffer.iTexture, w+2*fDeltaXTrapeze, h+l, dx, dy, pVertexTab, iNbVertex, pDock->container.bIsHorizontal, pDock->container.bDirectionUp, pDock->fDecorationsOffsetX);
      
      //\____________________ On dessine le cadre.
      if (l != 0)
            cairo_dock_draw_current_path_opengl (l, myBackground.fLineColor, iNbVertex);
      glPopMatrix ();
      
      /// donner un effet d'epaisseur => chaud du slip avec les separateurs physiques !
      
      
      //\____________________ On dessine la ficelle qui les joint.
      if (myIcons.iStringLineWidth > 0)
            cairo_dock_draw_string_opengl (pDock, myIcons.iStringLineWidth, FALSE, (my_iDrawSeparator3D == CD_FLAT_SEPARATOR || my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR));
      
      //\____________________ On dessine les icones et les etiquettes, en tenant compte de l'ordre pour dessiner celles en arriere-plan avant celles en avant-plan.
      GList *pFirstDrawnElement = cairo_dock_get_first_drawn_element_linear (pDock->icons);
      if (pFirstDrawnElement == NULL)
            return;
            
      double fDockMagnitude = cairo_dock_calculate_magnitude (pDock->iMagnitudeIndex);
      Icon *icon;
      GList *ic = pFirstDrawnElement;
      
      ///glLoadIdentity ();
      if (my_iDrawSeparator3D == CD_FLAT_SEPARATOR || my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
      {
            do
            {
                  icon = ic->data;
                  
                  if (icon->cFileName == NULL && CAIRO_DOCK_IS_SEPARATOR (icon))
                  {
                        glPushMatrix ();
                        if (my_iDrawSeparator3D == CD_FLAT_SEPARATOR)
                              cd_rendering_draw_flat_separator_opengl (icon, pDock);
                        else
                              cd_rendering_draw_physical_separator_opengl (icon, pDock, TRUE, NULL, NULL);
                        glPopMatrix ();
                  }
                  
                  ic = cairo_dock_get_next_element (ic, pDock->icons);
            } while (ic != pFirstDrawnElement);
            
            do
            {
                  icon = ic->data;
                  
                  if (icon->cFileName != NULL || ! CAIRO_DOCK_IS_SEPARATOR (icon))
                  {
                        glPushMatrix ();
                        cairo_dock_render_one_icon_opengl (icon, pDock, fDockMagnitude, TRUE);
                        glPopMatrix ();
                  }
                  
                  ic = cairo_dock_get_next_element (ic, pDock->icons);
            } while (ic != pFirstDrawnElement);
            
            if (my_iDrawSeparator3D == CD_PHYSICAL_SEPARATOR)
            {
                  do
                  {
                        icon = ic->data;
                        
                        if (icon->cFileName == NULL && CAIRO_DOCK_IS_SEPARATOR (icon))
                        {
                              glPushMatrix ();
                              cd_rendering_draw_physical_separator_opengl (icon, pDock, FALSE, NULL, NULL);
                              glPopMatrix ();
                        }
                        
                        ic = cairo_dock_get_next_element (ic, pDock->icons);
                  } while (ic != pFirstDrawnElement);
            }
      }
      else
      {
            do
            {
                  icon = ic->data;
                  
                  glPushMatrix ();
                  cairo_dock_render_one_icon_opengl (icon, pDock, fDockMagnitude, TRUE);
                  glPopMatrix ();
                  
                  ic = cairo_dock_get_next_element (ic, pDock->icons);
            } while (ic != pFirstDrawnElement);
      }
}


void cd_rendering_draw_flat_separator_opengl (Icon *icon, CairoDock *pDock)
{
      double hi = myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin;
      double fLeftInclination = (icon->fDrawX - pDock->container.iWidth / 2) / iVanishingPointY;
      double fRightInclination = (icon->fDrawX + icon->fWidth * icon->fScale - pDock->container.iWidth / 2) / iVanishingPointY;
      
      double fHeight = pDock->iDecorationsHeight;
      double fBigWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + hi);
      double fLittleWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + hi - fHeight);
      
      double fDeltaXLeft = fHeight * fLeftInclination;
      double fDeltaXRight = fHeight * fRightInclination;
      //g_print ("fBigWidth : %.2f ; fLittleWidth : %.2f\n", fBigWidth, fLittleWidth);
      
      double fDockOffsetX, fDockOffsetY;
      fDockOffsetX = icon->fDrawX - (fHeight - hi) * fLeftInclination;
      fDockOffsetY = fHeight + myBackground.iDockLineWidth;
      
      glEnable (GL_BLEND);
      glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
      glColor4f (1., 1., 1., 1.);
      
      glEnable (GL_TEXTURE_2D);
      glBindTexture (GL_TEXTURE_2D, my_iFlatSeparatorTexture);
      glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
      
      glPolygonMode (GL_FRONT, GL_FILL);
      
      if (pDock->container.bIsHorizontal)
      {
            if (! pDock->container.bDirectionUp)
                  fDockOffsetY = pDock->container.iHeight - fDockOffsetY;
            
            glTranslatef (fDockOffsetX, fDockOffsetY, 0.);  // coin haut gauche.
            if (! pDock->container.bDirectionUp)
                  glScalef (1., -1., 1.);
      }
      else
      {
            if (pDock->container.bDirectionUp)
                  fDockOffsetY = pDock->container.iHeight - fDockOffsetY;
            fDockOffsetX = pDock->container.iWidth - fDockOffsetX;
            
            glTranslatef (fDockOffsetY, fDockOffsetX, 0.);
            glRotatef (-90., 0., 0., 1.);
            if (pDock->container.bDirectionUp)
                  glScalef (1., -1., 1.);
      }
      
      glBegin(GL_QUADS);
      glTexCoord2f(0., 0.);
      glVertex3f(0., 0., 0.);  // Bottom Left Of The Texture and Quad
      glTexCoord2f(1., 0.);
      glVertex3f(fLittleWidth, 0., 0.);  // Bottom Right Of The Texture and Quad
      glTexCoord2f(1., 1.);
      glVertex3f(fLittleWidth + fDeltaXRight, - fHeight, 0.);  // Top Right Of The Texture and Quad
      glTexCoord2f(0., 1.);
      glVertex3f(fLittleWidth + fDeltaXRight - fBigWidth, - fHeight, 0.);  // Top Left Of The Texture and Quad
      glEnd();
      
      glDisable (GL_TEXTURE_2D);
      glDisable (GL_BLEND);
}

void cd_rendering_draw_physical_separator_opengl (Icon *icon, CairoDock *pDock, gboolean bBackGround, Icon *prev_icon, Icon *next_icon)
{
      if (prev_icon == NULL)
            prev_icon = icon;
      if (next_icon == NULL)
            next_icon = icon;
      double hi = myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin;
      hi = (pDock->container.bDirectionUp ? pDock->container.iHeight - (icon->fDrawY + icon->fHeight * icon->fScale) : icon->fDrawY);
      //g_print ("%s : hi = %.2f/%.2f\n", icon->cName, myIcons.fReflectSize * pDock->container.fRatio + myBackground.iFrameMargin, pDock->container.iHeight - (icon->fDrawY + icon->fHeight * icon->fScale));
      double fLeftInclination = (icon->fDrawX - pDock->container.iWidth / 2) / iVanishingPointY;
      double fRightInclination = (icon->fDrawX + icon->fWidth * icon->fScale - pDock->container.iWidth / 2) / iVanishingPointY;
      
      double fHeight, fBigWidth, fLittleWidth;
      if (bBackGround)
      {
            fHeight = pDock->iDecorationsHeight + myBackground.iDockLineWidth - hi;
            fBigWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + 0);
            fLittleWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + 0 - fHeight);
      }
      else
      {
            fHeight = hi + myBackground.iDockLineWidth;
            fBigWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + hi);
            fLittleWidth = fabs (fRightInclination - fLeftInclination) * (iVanishingPointY + hi - fHeight);
      }
      double fDeltaXLeft = fHeight * fLeftInclination;
      double fDeltaXRight = fHeight * fRightInclination;
      
      double fDockOffsetX, fDockOffsetY;
      if (bBackGround)
      {
            fDockOffsetX = icon->fDrawX - fHeight * fLeftInclination;
            fDockOffsetY = pDock->iDecorationsHeight + 2*myBackground.iDockLineWidth;
      }
      else
      {
            fDockOffsetX = icon->fDrawX;
            fDockOffsetY = fHeight;
      }
      //g_print ("X : %.2f + %.2f/%.2f ; Y : %.2f + %.2f\n", fDockOffsetX, fBigWidth, fLittleWidth, fDockOffsetY, fHeight);
      
      glEnable (GL_BLEND);
      glBlendFunc (GL_ONE, GL_ZERO);
      glColor4f (0., 0., 0., 0.);
      
      glPolygonMode (GL_FRONT, GL_FILL);
      
      if (pDock->container.bIsHorizontal)
      {
            if (! pDock->container.bDirectionUp)
                  fDockOffsetY = pDock->container.iHeight - fDockOffsetY;
            
            glTranslatef (fDockOffsetX, fDockOffsetY, 0.);  // coin haut gauche.
            if (! pDock->container.bDirectionUp)
                  glScalef (1., -1., 1.);
      }
      else
      {
            if (pDock->container.bDirectionUp)
                  fDockOffsetY = pDock->container.iHeight - fDockOffsetY;
            fDockOffsetX = pDock->container.iWidth - fDockOffsetX;
            
            glTranslatef (fDockOffsetY, fDockOffsetX, 0.);
            glRotatef (-90., 0., 0., 1.);
            if (pDock->container.bDirectionUp)
                  glScalef (1., -1., 1.);
      }
      
      glBegin(GL_QUADS);
      glVertex3f(0., 0., 0.);  // Bottom Left Of The Texture and Quad
      glVertex3f(fLittleWidth, 0., 0.);  // Bottom Right Of The Texture and Quad
      glVertex3f(fLittleWidth + fDeltaXRight, - fHeight, 0.);  // Top Right Of The Texture and Quad
      glVertex3f(fLittleWidth + fDeltaXRight - fBigWidth, - fHeight, 0.);  // Top Left Of The Texture and Quad
      glEnd();
      
      if (myBackground.iDockLineWidth != 0)
      {
            glPolygonMode (GL_FRONT, GL_LINE);
            glEnable (GL_LINE_SMOOTH);
            glHint (GL_LINE_SMOOTH_HINT, GL_NICEST);
            glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
            
            glLineWidth (myBackground.iDockLineWidth);
            glColor4f (myBackground.fLineColor[0], myBackground.fLineColor[1], myBackground.fLineColor[2], myBackground.fLineColor[3]);
            
            glBegin(GL_LINES);
            glVertex3f(fLittleWidth, 0., 0.);
            glVertex3f(fLittleWidth + fDeltaXRight, - fHeight, 0.);
            glEnd();
            
            glBegin(GL_LINES);
            glVertex3f(0., 0., 0.);
            glVertex3f(fLittleWidth + fDeltaXRight - fBigWidth, - fHeight, 0.);
            glEnd();
            
            glDisable(GL_LINE_SMOOTH);
      }
      
      glDisable (GL_BLEND);
}


void cd_rendering_register_3D_plane_renderer (const gchar *cRendererName)
{
      CairoDockRenderer *pRenderer = g_new0 (CairoDockRenderer, 1);
      pRenderer->cReadmeFilePath = g_strdup_printf ("%s/readme-3D-plane-view", MY_APPLET_SHARE_DATA_DIR);
      pRenderer->cPreviewFilePath = g_strdup_printf ("%s/preview-3D-plane.jpg", MY_APPLET_SHARE_DATA_DIR);
      pRenderer->compute_size = cd_rendering_calculate_max_dock_size_3D_plane;
      pRenderer->calculate_icons = cd_rendering_calculate_icons_3D_plane;
      pRenderer->render = cd_rendering_render_3D_plane;
      pRenderer->render_optimized = cd_rendering_render_optimized_3D_plane;
      pRenderer->render_opengl = cd_rendering_render_3D_plane_opengl;
      pRenderer->set_subdock_position = cairo_dock_set_subdock_position_linear;
      pRenderer->bUseReflect = TRUE;
      pRenderer->cDisplayedName = D_ (cRendererName);
      
      cairo_dock_register_renderer (cRendererName, pRenderer);
}

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