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/*
* This file is part of Chalk
*
* Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "kis_grid_drawer.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_GL
#include <tqgl.h>
#endif
#include "kis_config.h"
#include "kis_image.h"
#include "kis_perspective_grid.h"
#include "kis_perspective_grid_manager.h"
Qt::PenStyle GridDrawer::gs2style(TQ_UINT32 s)
{
switch(s)
{
case 1:
return Qt::DashLine;
case 2:
return Qt::DotLine;
case 3:
return Qt::DashDotLine;
case 4:
return Qt::DashDotDotLine;
default:
return Qt::SolidLine;
}
}
void GridDrawer::drawPerspectiveGrid(KisImageSP image, const TQRect& /*wr*/, const KisSubPerspectiveGrid* grid)
{
Q_UNUSED(image);
KisConfig cfg;
TQPen mainPen = TQPen ( cfg.getGridMainColor(), 1, gs2style( cfg.getGridMainStyle() ) );
TQPen subdivisionPen = TQPen ( cfg.getGridSubdivisionColor(), 1, gs2style( cfg.getGridSubdivisionStyle() ) );
setPen(subdivisionPen );
// 1 -> top-left corner
// 2 -> top-right corner
// 3 -> bottom-right corner
// 4 -> bottom-left corner
// d12 line from top-left to top-right
// note that the notion of top-left is purely theorical
KisPerspectiveMath::LineEquation d12 = KisPerspectiveMath::computeLineEquation( grid->topLeft(), grid->topRight() ) ;
KisPoint v12 = KisPoint(*grid->topLeft() - *grid->topRight());
v12.setX( v12.x() / grid->subdivisions()); v12.setY( v12.y() / grid->subdivisions() );
KisPerspectiveMath::LineEquation d23 = KisPerspectiveMath::computeLineEquation( grid->topRight(), grid->bottomRight() );
KisPoint v23 = KisPoint(*grid->topRight() - *grid->bottomRight());
v23.setX( v23.x() / grid->subdivisions()); v23.setY( v23.y() / grid->subdivisions() );
KisPerspectiveMath::LineEquation d34 = KisPerspectiveMath::computeLineEquation( grid->bottomRight(), grid->bottomLeft() );
KisPerspectiveMath::LineEquation d41 = KisPerspectiveMath::computeLineEquation( grid->bottomLeft(), grid->topLeft() );
KisPoint horizVanishingPoint = KisPerspectiveMath::computeIntersection(d12,d34);
KisPoint vertVanishingPoint = KisPerspectiveMath::computeIntersection(d23,d41);
for(uint i = 1; i < static_cast<uint>(grid->subdivisions()); i ++)
{
KisPoint pol1 = *grid->topRight() + i * v12;
KisPerspectiveMath::LineEquation d1 = KisPerspectiveMath::computeLineEquation( &pol1, &vertVanishingPoint );
KisPoint pol1b = KisPerspectiveMath::computeIntersection(d1,d34);
drawLine( pol1.roundTQPoint(), pol1b.roundTQPoint() );
KisPoint pol2 = *grid->bottomRight() + i * v23;
KisPerspectiveMath::LineEquation d2 = KisPerspectiveMath::computeLineEquation( &pol2, &horizVanishingPoint );
KisPoint pol2b = KisPerspectiveMath::computeIntersection(d2,d41);
drawLine( pol2.roundTQPoint(), pol2b.roundTQPoint() );
}
setPen(mainPen);
drawLine( grid->topLeft(), grid->topRight() );
drawLine( grid->topRight(), grid->bottomRight() );
drawLine( grid->bottomRight(), grid->bottomLeft() );
drawLine( grid->bottomLeft(), grid->topLeft() );
}
void GridDrawer::drawGrid(KisImageSP image, const TQRect& wr)
{
KisConfig cfg;
TQ_UINT32 offsetx = cfg.getGridOffsetX();
TQ_UINT32 offsety = cfg.getGridOffsetY();
TQ_UINT32 hspacing = cfg.getGridHSpacing();
TQ_UINT32 vspacing = cfg.getGridVSpacing();
TQ_UINT32 subdivision = cfg.getGridSubdivisions() - 1;
//double ihspsub = hspacing / (double)subdivision;
//double ivspsub = hspacing / (double)subdivision;
TQ_INT32 imageWidth = image->width();
TQ_INT32 imageHeight = image->height();
// Draw vertical line
TQPen mainPen = TQPen ( cfg.getGridMainColor(), 1, gs2style( cfg.getGridMainStyle() ) );
TQPen subdivisionPen = TQPen ( cfg.getGridSubdivisionColor(), 1, gs2style( cfg.getGridSubdivisionStyle() ) );
TQ_UINT32 i = 0;
for( TQ_INT32 x = offsetx; x <= wr.right(); x +=hspacing)
{
if( i == subdivision )
{
setPen(mainPen);
i = 0;
} else {
setPen(subdivisionPen);
i++;
}
if( x >= wr.x() )
{
// Always draw the full line otherwise the line stippling varies
// with the location of wr and we get glitchy patterns.
drawLine(x, 0, x, imageHeight);
}
}
// Draw horizontal line
i = 0;
for( TQ_INT32 y = offsety; y <= wr.bottom(); y +=vspacing)
{
if( i == subdivision )
{
setPen(mainPen);
i = 0;
} else {
setPen(subdivisionPen);
i++;
}
if( y >= wr.y() )
{
drawLine(0, y, imageWidth, y);
}
}
}
OpenGLGridDrawer::OpenGLGridDrawer()
{
#ifdef HAVE_GL
glPushAttrib(GL_ALL_ATTRIB_BITS);
#endif
}
OpenGLGridDrawer::~OpenGLGridDrawer()
{
#ifdef HAVE_GL
glPopAttrib();
#endif
}
void OpenGLGridDrawer::setPen(const TQPen& pen)
{
#ifdef HAVE_GL
Qt::PenStyle penStyle = pen.style();
if (penStyle == TQt::SolidLine) {
glDisable(GL_LINE_STIPPLE);
} else {
GLushort lineStipple;
switch (penStyle) {
case TQt::NoPen:
lineStipple = 0;
break;
default:
case TQt::SolidLine:
lineStipple = 0xffff;
break;
case TQt::DashLine:
lineStipple = 0x3fff;
break;
case TQt::DotLine:
lineStipple = 0x3333;
break;
case TQt::DashDotLine:
lineStipple = 0x33ff;
break;
case TQt::DashDotDotLine:
lineStipple = 0x333f;
break;
}
glEnable(GL_LINE_STIPPLE);
glLineStipple(1, lineStipple);
}
TQColor penColor = pen.color();
glColor3ub(penColor.red(), penColor.green(), penColor.blue());
#else
Q_UNUSED(pen);
#endif
}
void OpenGLGridDrawer::drawLine(TQ_INT32 x1, TQ_INT32 y1, TQ_INT32 x2, TQ_INT32 y2)
{
#ifdef HAVE_GL
glBegin(GL_LINES);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glEnd();
#else
Q_UNUSED(x1);
Q_UNUSED(y1);
Q_UNUSED(x2);
Q_UNUSED(y2);
#endif
}
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