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54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#include <QPainter>
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#include <QPixmapCache>
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#include "config.h"
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#include "image.h"
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#define TILE_SIZE 256
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Image::Image(const QString &fileName) : _img(fileName), _fileName(fileName)
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{
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}
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void Image::draw(QPainter *painter, const QRectF &rect, Map::Flags flags)
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{
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#ifdef ENABLE_HIDPI
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qreal ratio = _img.devicePixelRatioF();
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#else // ENABLE_HIDPI
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qreal ratio = 1.0;
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#endif // ENABLE_HIDPI
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QRectF sr(rect.topLeft() * ratio, rect.size() * ratio);
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if (flags & Map::OpenGL) {
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for (int i = sr.left()/TILE_SIZE; i <= sr.right()/TILE_SIZE; i++) {
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for (int j = sr.top()/TILE_SIZE; j <= sr.bottom()/TILE_SIZE; j++) {
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QString key = _fileName + "-" + QString::number(i) + "_"
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+ QString::number(j);
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QPoint tl(i * TILE_SIZE, j * TILE_SIZE);
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QPixmap pm;
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if (!QPixmapCache::find(key, &pm)) {
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QRect tile(tl, QSize(TILE_SIZE, TILE_SIZE));
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pm = QPixmap::fromImage(_img.copy(tile));
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if (!pm.isNull())
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QPixmapCache::insert(key, pm);
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}
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#ifdef ENABLE_HIDPI
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pm.setDevicePixelRatio(ratio);
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#endif // ENABLE_HIDPI
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painter->drawPixmap(tl/ratio, pm);
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}
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}
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} else
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painter->drawImage(rect.topLeft(), _img, sr);
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}
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void Image::setDevicePixelRatio(qreal ratio)
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{
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#ifdef ENABLE_HIDPI
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_img.setDevicePixelRatio(ratio);
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#else // ENABLE_HIDPI
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Q_UNUSED(ratio);
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#endif // ENABLE_HIDPI
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}
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