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/* Keramik Style for KDE3, gradient routines..
Copyright (c) 2002 Malte Starostik <malte@kde.org>
(c) 2002 Maksim Orlovich <mo002j@mail.rochester.edu>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
// $Id$
#include <tqpainter.h>
#include <tqrect.h>
#include <tqcolor.h>
#include "gradients.h"
#include "colorutil.h"
#include <tqimage.h>
#include <tqintcache.h>
#include <kimageeffect.h>
namespace
{
struct GradientCacheEntry
{
TQPixmap* m_pixmap;
QRgb m_color;
bool m_menu;
int m_width;
int m_height;
GradientCacheEntry(int width, int height, const TQColor& color, bool menu):
m_pixmap(0), m_color(color.rgb()), m_menu(menu), m_width(width), m_height(height)
{}
int key()
{
return (int)m_menu ^ m_width ^ (m_height << 16) ^ ((m_color)<<8);
}
bool operator == (const GradientCacheEntry& other)
{
return ((m_width == other.m_width) &&
(m_height == other.m_height) &&
(m_menu == other.m_menu) &&
(m_color == other.m_color));
}
~GradientCacheEntry()
{
delete m_pixmap;
}
};
TQIntCache<GradientCacheEntry> cache(65636, 17);
}
using namespace Keramik;
void GradientPainter::releaseCache()
{
cache.clear();
}
void GradientPainter::renderGradient( TQPainter* p, const TQRect& r, TQColor c,
bool horizontal, bool menu, int px, int py,
int pwidth, int pheight)
{
int width = r.width(), height = r.height();
if (pwidth != -1) width = pwidth;
if (pheight != -1) height = pheight;
if (horizontal)
width = 18;
else
height = 18;
GradientCacheEntry entry (width, height, c, menu);
GradientCacheEntry* cacheEntry = 0;
cache.setAutoDelete(true);
int key = entry.key();
if ((cacheEntry = cache.find(key, false)))
{
if (entry == *cacheEntry)
{
p->drawTiledPixmap(r, *cacheEntry->m_pixmap, horizontal? TQPoint(0,py): TQPoint(px,0));
return;
}
else
cache.remove(key);
//Remove old entry in case of conflicts.. otherwise we end up w/unreachable items in cache
}
if (horizontal)
{
TQPixmap* pix = new TQPixmap(18, height);
if (menu)
{
TQImage gr = KImageEffect::gradient(TQSize(4,height), c.light(93), ColorUtil::lighten(c,109), KImageEffect::VerticalGradient );
TQPixmap grT(gr);
TQPainter p2(pix);
p2.drawTiledPixmap(0,0, 18, height, grT);
p2.end();
}
else
{
int h1 = 3 * height/4;
int h2 = height - h1;
TQImage top = KImageEffect::gradient(TQSize(4,h1), ColorUtil::lighten(c,110), c.light(94), KImageEffect::VerticalGradient );
TQImage bot = KImageEffect::gradient(TQSize(4,h2), c.light(94), ColorUtil::lighten(c,109), KImageEffect::VerticalGradient );
TQPixmap topT(top);
TQPixmap botT(bot);
TQPainter p2(pix);
p2.drawTiledPixmap(0, 0, 18, h1, topT);
p2.drawTiledPixmap(0, h1, 18, h2, botT);
p2.end();
}
entry.m_pixmap = pix;
}
else
{
TQPixmap* pix = new TQPixmap(width, 18);
int h1 = 3 * width/4;
int h2 = width - h1;
TQImage top = KImageEffect::gradient(TQSize(h1,4), ColorUtil::lighten(c,110), c.light(94), KImageEffect::HorizontalGradient );
TQImage bot = KImageEffect::gradient(TQSize(h2,4), c.light(94), ColorUtil::lighten(c,109), KImageEffect::HorizontalGradient );
TQPixmap topT(top);
TQPixmap botT(bot);
TQPainter p2(pix);
p2.drawTiledPixmap(0, 0, h1, 18, topT);
p2.drawTiledPixmap(h1, 0, h2, 18, botT);
p2.end();
entry.m_pixmap = pix;
}
bool cacheOK = false;
GradientCacheEntry* imgToAdd = new GradientCacheEntry(entry);
cacheOK = cache.insert(imgToAdd->key(), imgToAdd,
imgToAdd->m_pixmap->width() * imgToAdd->m_pixmap->height()*
imgToAdd->m_pixmap->depth()/8);
p->drawTiledPixmap(r, *imgToAdd->m_pixmap, horizontal? TQPoint(0,py): TQPoint(px,0));
if (!cacheOK)
delete imgToAdd;
entry.m_pixmap = 0;//Don't free too early..
}
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