[layouts] Use smooth pixmap transform when rendering picture items

qgis · Nov 9, 2021 · e35790d · e35790d
1 parent a559212
commit e35790d
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Showing 13 changed files with 5 additions and 1 deletion.
diff --git a/src/core/layout/qgslayoutitempicture.cpp b/src/core/layout/qgslayoutitempicture.cpp
@@ -92,6 +92,10 @@ void QgsLayoutItemPicture::draw( QgsLayoutItemRenderContext &context )
   // painter is scaled to dots, so scale back to layout units
   painter->scale( context.renderContext().scaleFactor(), context.renderContext().scaleFactor() );
 
+  const bool prevSmoothTransform = painter->testRenderHint( QPainter::RenderHint::SmoothPixmapTransform );
+  if ( mLayout->renderContext().testFlag( QgsLayoutRenderContext::FlagAntialiasing ) )
+    painter->setRenderHint( QPainter::RenderHint::SmoothPixmapTransform, true );
+
   //picture resizing
   if ( mMode != FormatUnknown )
   {
@@ -203,8 +207,8 @@ void QgsLayoutItemPicture::draw( QgsLayoutItemRenderContext &context )
     {
       painter->drawImage( QRectF( 0, 0, boundRectWidthMM, boundRectHeightMM ), mImage, imageRect );
     }
-
   }
+  painter->setRenderHint( QPainter::RenderHint::SmoothPixmapTransform, prevSmoothTransform );
 }
 
 QSizeF QgsLayoutItemPicture::applyItemSizeConstraint( const QSizeF targetSize )

diff --git a/...e/expected_composerpicture_clip_anchor/expected_composerpicture_clip_anchor.png b/...e/expected_composerpicture_clip_anchor/expected_composerpicture_clip_anchor.png
diff --git a/...serpicture_clip_anchoroversize/expected_composerpicture_clip_anchoroversize.png b/...serpicture_clip_anchoroversize/expected_composerpicture_clip_anchoroversize.png
diff --git a/...expected_composerpicture_itemrotation/expected_composerpicture_itemrotation.png b/...expected_composerpicture_itemrotation/expected_composerpicture_itemrotation.png
diff --git a/...ser_picture/expected_composerpicture_remote/expected_composerpicture_remote.png b/...ser_picture/expected_composerpicture_remote/expected_composerpicture_remote.png
diff --git a/...ser_picture/expected_composerpicture_render/expected_composerpicture_render.png b/...ser_picture/expected_composerpicture_render/expected_composerpicture_render.png
diff --git a/...e/expected_composerpicture_resize_clip/expected_composerpicture_resize_clip.png b/...e/expected_composerpicture_resize_clip/expected_composerpicture_resize_clip.png
diff --git a/...serpicture_resize_frametoimage/expected_composerpicture_resize_frametoimage.png b/...serpicture_resize_frametoimage/expected_composerpicture_resize_frametoimage.png
diff --git a/...cted_composerpicture_resize_stretch/expected_composerpicture_resize_stretch.png b/...cted_composerpicture_resize_stretch/expected_composerpicture_resize_stretch.png
diff --git a/...e/expected_composerpicture_resize_zoom/expected_composerpicture_resize_zoom.png b/...e/expected_composerpicture_resize_zoom/expected_composerpicture_resize_zoom.png
diff --git a/...omposerpicture_resize_zoomresize/expected_composerpicture_resize_zoomresize.png b/...omposerpicture_resize_zoomresize/expected_composerpicture_resize_zoomresize.png
diff --git a/...picture/expected_composerpicture_rotation/expected_composerpicture_rotation.png b/...picture/expected_composerpicture_rotation/expected_composerpicture_rotation.png
diff --git a/...e/expected_composerpicture_zoom_anchor/expected_composerpicture_zoom_anchor.png b/...e/expected_composerpicture_zoom_anchor/expected_composerpicture_zoom_anchor.png