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path: root/noncore/graphics/drawpad
authorleseb <leseb>2002-06-19 06:28:00 (UTC)
committer leseb <leseb>2002-06-19 06:28:00 (UTC)
commitf2cf56b43d80c16329bda01f9e37e52fb8546816 (patch) (side-by-side diff)
treee94db34e932ca1f135f98642a6f15b03f32c920d /noncore/graphics/drawpad
parentb83e9d1f794fdd6089beda10697243bb087e3d0a (diff)
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Anti-aliasing support
Diffstat (limited to 'noncore/graphics/drawpad') (more/less context) (ignore whitespace changes)
-rw-r--r--noncore/graphics/drawpad/linetool.cpp47
1 files changed, 45 insertions, 2 deletions
diff --git a/noncore/graphics/drawpad/linetool.cpp b/noncore/graphics/drawpad/linetool.cpp
index 94ca165..1480df2 100644
--- a/noncore/graphics/drawpad/linetool.cpp
+++ b/noncore/graphics/drawpad/linetool.cpp
@@ -16,6 +16,9 @@
#include "drawpad.h"
#include "drawpadcanvas.h"
+#include <qimage.h>
+#include <qpixmap.h>
+
LineTool::LineTool(DrawPad* drawPad, DrawPadCanvas* drawPadCanvas)
: ShapeTool(drawPad, drawPadCanvas)
{
@@ -29,9 +32,49 @@ void LineTool::drawFinalShape(QPainter& p)
{
p.setRasterOp(Qt::NotROP);
p.drawLine(m_polyline[2], m_polyline[0]);
- p.setPen(m_pDrawPad->pen());
+
+ QRect r = m_polyline.boundingRect();
+ r = r.normalize();
+ r.setLeft(r.left() - m_pDrawPad->pen().width());
+ r.setTop(r.top() - m_pDrawPad->pen().width());
+ r.setRight(r.right() + m_pDrawPad->pen().width());
+ r.setBottom(r.bottom() + m_pDrawPad->pen().width());
+
+ QPixmap areaPixmap(r.width(), r.height());
+ bitBlt(&areaPixmap, QPoint(0, 0), p.device(), r);
+
+ QImage areaImage = areaPixmap.convertToImage();
+ QImage bigAreaImage = areaImage.smoothScale(areaImage.width() * 3, areaImage.height() * 3);
+
+ QPixmap bigAreaPixmap;
+ bigAreaPixmap.convertFromImage(bigAreaImage);
+
+ QPen bigAreaPen = m_pDrawPad->pen();
+ bigAreaPen.setWidth(bigAreaPen.width() * 3);
+
+ QPainter bigAreaPainter;
+ bigAreaPainter.begin(&bigAreaPixmap);
+ bigAreaPainter.setPen(bigAreaPen);
+
+ if (((m_polyline[2].x() < m_polyline[0].x()) && (m_polyline[2].y() < m_polyline[0].y()))
+ || ((m_polyline[2].x() > m_polyline[0].x()) && (m_polyline[2].y() > m_polyline[0].y()))) {
+
+ bigAreaPainter.drawLine(bigAreaPen.width() + 1, bigAreaPen.width() + 1,
+ bigAreaPixmap.width() - bigAreaPen.width() - 2,
+ bigAreaPixmap.height() - bigAreaPen.width() - 2);
+ } else {
+ bigAreaPainter.drawLine(bigAreaPen.width() + 1, bigAreaPixmap.height() - bigAreaPen.width() - 2,
+ bigAreaPixmap.width() - bigAreaPen.width() - 2, bigAreaPen.width() + 1);
+ }
+
+ bigAreaPainter.end();
+
+ bigAreaImage = bigAreaPixmap.convertToImage();
+ areaImage = bigAreaImage.smoothScale(bigAreaImage.width() / 3, bigAreaImage.height() / 3);
+ areaPixmap.convertFromImage(areaImage);
+
p.setRasterOp(Qt::CopyROP);
- p.drawLine(m_polyline[2], m_polyline[0]);
+ p.drawPixmap(r.x(), r.y(), areaPixmap);
}
void LineTool::drawTemporaryShape(QPainter& p)