Michaël Lemaire
a2307c4746
git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@236 b1fd45b6-86a6-48da-8261-f70d1f35bdcc
413 lines
10 KiB
C++
413 lines
10 KiB
C++
#include "preview.h"
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#include <QVector>
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#include <QPainter>
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#include <QTimer>
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class PreviewDrawer:public QThread
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{
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public:
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PreviewDrawer(Preview* preview):
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QThread(),
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_preview(preview)
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{
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_running = false;
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}
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void askStop()
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{
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_running = false;
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}
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protected:
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void run()
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{
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_running = true;
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while (_running)
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{
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_preview->doRender();
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QThread::usleep(50000);
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}
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}
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private:
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Preview* _preview;
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bool _running;
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};
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Preview::Preview(QWidget* parent) :
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QWidget(parent)
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{
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this->lock = new QMutex();
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this->conf_scroll_xmin = 0.0;
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this->conf_scroll_xmax = 0.0;
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this->conf_scroll_ymin = 0.0;
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this->conf_scroll_ymax = 0.0;
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this->conf_scale_min = 1.0;
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this->conf_scale_max = 1.0;
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this->conf_scale_step = 0.0;
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this->scaling = 1.0;
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this->xoffset = 0.0;
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this->yoffset = 0.0;
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this->pixbuf = new QImage(this->size(), QImage::Format_ARGB32);
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this->pixbuf->fill(0x00000000);
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this->alive = true;
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this->need_rerender = false;
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this->need_render = true;
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this->setMinimumSize(256, 256);
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this->setMaximumSize(256, 256);
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this->resize(256, 256);
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QObject::connect(this, SIGNAL(contentChange()), this, SLOT(update()));
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this->updater = new PreviewDrawer(this);
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this->updater->start();
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}
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Preview::~Preview()
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{
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alive = false;
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((PreviewDrawer*)updater)->askStop();
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updater->wait();
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delete updater;
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delete pixbuf;
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}
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QColor Preview::getColor(double x, double y)
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{
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return QColor(0, 0, 0);
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}
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void Preview::doRender()
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{
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if (this->alive)
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{
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if (this->need_rerender)
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{
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this->forceRender();
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}
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if (this->need_render)
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{
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this->need_render = false;
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this->renderPixbuf();
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}
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}
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}
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void Preview::redraw()
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{
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//lock->lock();
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need_rerender = true;
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//lock->unlock();
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}
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void Preview::setScaling(double scaling)
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{
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// TODO Follow conf_scale
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this->scaling = scaling;
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redraw();
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}
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void Preview::resizeEvent(QResizeEvent* event)
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{
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QImage* image;
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this->lock->lock();
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image = this->pixbuf;
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this->pixbuf = new QImage(this->size(), QImage::Format_ARGB32);
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this->pixbuf->fill(0x00000000);
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this->need_rerender = true;
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this->need_render = true;
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delete image;
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this->lock->unlock();
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}
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void Preview::paintEvent(QPaintEvent* event)
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{
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QPainter painter(this);
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painter.drawImage(0, 0, *this->pixbuf);
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}
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void Preview::forceRender()
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{
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this->lock->lock();
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this->pixbuf->fill(0x00000000);
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this->need_rerender = false;
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this->need_render = true;
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this->lock->unlock();
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}
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void Preview::renderPixbuf()
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{
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QColor col;
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bool done;
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int x, y, w, h;
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w = this->pixbuf->width();
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h = this->pixbuf->height();
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for (x = 0; x < w; x++)
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{
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this->lock->lock();
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if (this->need_rerender || !this->alive)
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{
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this->lock->unlock();
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break;
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}
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done = false;
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for (y = 0; y < h; y++)
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{
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if (qAlpha(this->pixbuf->pixel(x, y)) == 0)
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{
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col = this->getColor((double)(x - w / 2) * this->scaling + this->xoffset, (double)(y - h / 2) * this->scaling + this->yoffset);
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this->pixbuf->setPixel(x, y, col.rgb());
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done = true;
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}
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}
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if (done && (x == w - 1 || x % 10 == 0))
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{
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emit contentChange();
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}
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this->lock->unlock();
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}
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}
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//static void _scrollPixbuf(SmallPreview* preview, int dx, int dy)
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//{
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// int xstart, ystart, xsize, ysize, y;
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// void* pixels = gdk_pixbuf_get_pixels(preview->pixbuf);
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// int rowstride = gdk_pixbuf_get_rowstride(preview->pixbuf);
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// preview->xoffset -= (double)dx * preview->scaling;
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// preview->yoffset -= (double)dy * preview->scaling;
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// /* TODO Use pixbuf size */
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// if (dx == 0 && dy == 0)
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// {
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// return;
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// }
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// else if (dx <= -256 || dx >= 256 || dy <= -256 || dy >= 256)
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// {
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// _forceRender(preview);
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// }
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// else
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// {
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// if (dx < 0)
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// {
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// xstart = -dx;
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// xsize = 256 + dx;
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// }
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// else
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// {
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// xstart = 0;
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// xsize = 256 - dx;
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// }
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// if (dy < 0)
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// {
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// ystart = -dy;
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// ysize = 256 + dy;
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// }
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// else
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// {
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// ystart = 0;
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// ysize = 256 - dy;
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// }
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// memmove(pixels + (ystart + dy) * rowstride + (xstart + dx) * 4, pixels + ystart * rowstride + xstart * 4, (ysize - 1) * rowstride + xsize * 4);
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// if (dy < 0)
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// {
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// memset(pixels + (256 + dy) * rowstride, 0, (-dy - 1) * rowstride + 256 * 4);
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// }
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// else if (dy > 0)
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// {
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// memset(pixels, 0, (dy - 1) * rowstride + 256 * 4);
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// }
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// if (dx < 0)
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// {
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// for (y = ystart + dy; y < ystart + dy + ysize; y++)
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// {
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// memset(pixels + y * rowstride + xsize * 4, 0, -dx * 4);
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// }
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// }
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// else if (dx > 0)
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// {
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// for (y = ystart + dy; y < ystart + dy + ysize; y++)
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// {
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// memset(pixels + y * rowstride, 0, dx * 4);
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// }
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// }
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// preview->need_render = 1;
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// }
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//}
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//static inline int _fixScroll(SmallPreview* preview, int dx, int dy, int* new_dx, int* new_dy)
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//{
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// *new_dx = dx;
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// *new_dy = dy;
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// if (preview->xoffset - dx * preview->scaling > preview->conf_scroll_xmax)
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// {
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// *new_dx = (int)floor((preview->conf_scroll_xmax - preview->xoffset) / preview->scaling);
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// }
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// if (preview->xoffset - dx * preview->scaling < preview->conf_scroll_xmin)
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// {
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// *new_dx = (int)floor((preview->conf_scroll_xmin - preview->xoffset) / preview->scaling);
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// }
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// if (preview->yoffset - dy * preview->scaling > preview->conf_scroll_ymax)
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// {
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// *new_dy = (int)floor((preview->conf_scroll_ymax - preview->yoffset) / preview->scaling);
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// }
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// if (preview->yoffset - dy * preview->scaling < preview->conf_scroll_ymin)
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// {
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// *new_dy = (int)floor((preview->conf_scroll_ymin - preview->yoffset) / preview->scaling);
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// }
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// return (*new_dx == 0 && *new_dy == 0) ? 0 : 1;
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//}
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//static inline int _fixScaling(SmallPreview* preview, double scaling, double* new_scaling)
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//{
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// double old_scaling = preview->scaling;
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// *new_scaling = scaling;
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// if (scaling < preview->conf_scale_min)
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// {
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// *new_scaling = preview->conf_scale_min;
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// }
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// if (scaling > preview->conf_scale_max)
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// {
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// *new_scaling = preview->conf_scale_max;
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// }
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// return (old_scaling == *new_scaling) ? 0 : 1;
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//}
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//static int _cbMouseScroll(GtkEventBox* image, GdkEventScroll* event, gpointer data)
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//{
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// SmallPreview* preview = (SmallPreview*)data;
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// /* TODO Center the zoom on the cursor */
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// if (event->direction == GDK_SCROLL_UP)
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// {
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// mutexAcquire(preview->lock);
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// if (_fixScaling(preview, preview->scaling - preview->conf_scale_step, &preview->scaling))
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// {
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// preview->need_rerender = 1;
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// }
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// mutexRelease(preview->lock);
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// }
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// else if (event->direction == GDK_SCROLL_DOWN)
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// {
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// mutexAcquire(preview->lock);
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// if (_fixScaling(preview, preview->scaling + preview->conf_scale_step, &preview->scaling))
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// {
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// preview->need_rerender = 1;
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// }
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// mutexRelease(preview->lock);
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// }
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// return 1;
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//}
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//static int _cbMouseButtonPressed(GtkEventBox* image, GdkEventButton* event, gpointer data)
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//{
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// SmallPreview* preview = (SmallPreview*)data;
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// if (event->button == 1)
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// {
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// preview->mousex = (int)event->x;
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// preview->mousey = (int)event->y;
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// }
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// return 1;
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//}
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//static int _cbMouseMove(GtkEventBox* image, GdkEventMotion* event, gpointer data)
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//{
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// SmallPreview* preview = (SmallPreview*)data;
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// int dx, dy;
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// if (event->state & GDK_BUTTON1_MASK)
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// {
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// mutexAcquire(preview->lock);
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// dx = (int)event->x - preview->mousex;
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// dy = (int)event->y - preview->mousey;
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// if (_fixScroll(preview, dx, dy, &dx, &dy))
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// {
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// _scrollPixbuf(preview, dx, dy);
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// }
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// preview->mousex = (int)event->x;
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// preview->mousey = (int)event->y;
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// mutexRelease(preview->lock);
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// }
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// return 1;
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//}
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//void guiPreviewRedrawAll()
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//{
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// int i;
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// for (i = 0; i < _previews_count; i++)
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// {
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// guiPreviewRedraw(_preview + i);
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// }
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//}
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//void guiPreviewConfigScrolling(SmallPreview* preview, double xmin, double xmax, double ymin, double ymax)
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//{
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// mutexAcquire(preview->lock);
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// preview->conf_scroll_xmin = xmin;
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// preview->conf_scroll_xmax = xmax;
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// preview->conf_scroll_ymin = ymin;
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// preview->conf_scroll_ymax = ymax;
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// preview->need_rerender = 1;
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// mutexRelease(preview->lock);
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//}
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//void guiPreviewConfigScaling(SmallPreview* preview, double min, double max, double step)
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//{
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// mutexAcquire(preview->lock);
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// preview->conf_scale_min = min;
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// preview->conf_scale_max = max;
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// preview->conf_scale_step = step;
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// preview->need_rerender = 1;
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// mutexRelease(preview->lock);
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//}
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//void guiPreviewSetRenderer(SmallPreview* preview, SmallPreviewCallback renderer)
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//{
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// mutexAcquire(preview->lock);
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// preview->renderer = renderer;
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// preview->need_rerender = 1;
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// mutexRelease(preview->lock);
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//}
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//void guiPreviewSetViewport(SmallPreview* preview, double xoffset, double yoffset, double scaling)
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//{
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// mutexAcquire(preview->lock);
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// preview->xoffset = xoffset;
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// preview->yoffset = yoffset;
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// preview->scaling = scaling;
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// preview->need_rerender = 1;
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// mutexRelease(preview->lock);
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//}
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//void guiPreviewSetTerrainHeight(SmallPreview* preview)
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//{
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// /*preview->conf_scroll_x = 1;
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// preview->conf_scroll_y = 1;
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// preview->conf_zoom = 1;
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// preview->init_scaling = preview->scaling = 0.1;
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// preview->init_xoffset = preview->xoffset = 0.0;
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// preview->init_yoffset = preview->yoffset = 0.0;
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// preview->renderer = _renderTopDownHeight;*/
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// guiPreviewRedraw(preview);
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//}
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