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path: root/noncore/graphics/drawpad
authorleseb <leseb>2002-06-19 07:10:53 (UTC)
committer leseb <leseb>2002-06-19 07:10:53 (UTC)
commit1d60bfb5925c5009122ae04009f8e99658436b35 (patch) (side-by-side diff)
treeb2f81f2bda14b2228fb1d70dc194a4e112f0f66b /noncore/graphics/drawpad
parentb1fd4450c70522551361c6138688777cb29e1e2f (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/pointtool.cpp40
1 files changed, 35 insertions, 5 deletions
diff --git a/noncore/graphics/drawpad/pointtool.cpp b/noncore/graphics/drawpad/pointtool.cpp
index 656044b..22bb089 100644
--- a/noncore/graphics/drawpad/pointtool.cpp
+++ b/noncore/graphics/drawpad/pointtool.cpp
@@ -17,6 +17,7 @@
#include "drawpadcanvas.h"
#include "page.h"
+#include <qimage.h>
#include <qpainter.h>
PointTool::PointTool(DrawPad* drawPad, DrawPadCanvas* drawPadCanvas)
@@ -48,14 +49,12 @@ void PointTool::mouseReleaseEvent(QMouseEvent* e)
void PointTool::mouseMoveEvent(QMouseEvent* e)
{
if (m_mousePressed) {
- QPainter painter;
- painter.begin(m_pDrawPadCanvas->currentPage());
- painter.setPen(m_pDrawPad->pen());
m_polyline[2] = m_polyline[1];
m_polyline[1] = m_polyline[0];
m_polyline[0] = e->pos();
- painter.drawPolyline(m_polyline);
- painter.end();
+
+ QPainter painter;
+ painter.begin(m_pDrawPadCanvas->currentPage());
QRect r = m_polyline.boundingRect();
r = r.normalize();
@@ -64,6 +63,37 @@ void PointTool::mouseMoveEvent(QMouseEvent* e)
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), painter.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);
+
+ QPointArray bigAreaPolyline(3);
+ bigAreaPolyline.setPoint(0, (m_polyline[0].x() - r.x()) * 3 + 1, (m_polyline[0].y() - r.y()) * 3 + 1);
+ bigAreaPolyline.setPoint(1, (m_polyline[1].x() - r.x()) * 3 + 1, (m_polyline[1].y() - r.y()) * 3 + 1);
+ bigAreaPolyline.setPoint(2, (m_polyline[2].x() - r.x()) * 3 + 1, (m_polyline[2].y() - r.y()) * 3 + 1);
+
+ bigAreaPainter.drawPolyline(bigAreaPolyline);
+ bigAreaPainter.end();
+
+ bigAreaImage = bigAreaPixmap.convertToImage();
+ areaImage = bigAreaImage.smoothScale(bigAreaImage.width() / 3, bigAreaImage.height() / 3);
+ areaPixmap.convertFromImage(areaImage);
+
+ painter.drawPixmap(r.x(), r.y(), areaPixmap);
+ painter.end();
+
QRect viewportRect(m_pDrawPadCanvas->contentsToViewport(r.topLeft()),
m_pDrawPadCanvas->contentsToViewport(r.bottomRight()));