[graphics/krita] libs/ui/tool: Don't fetch if position still same

Git commit 6ef7f97026aaa6cd7e783660e9d285302ac404e9 by Emmet O'Neill, on behalf of Dat Le.
Committed on 13/08/2026 at 23:16.
Pushed by emmetoneill into branch 'master'.

Don't fetch if position still same

M  +2    -2    libs/ui/tool/KisAsyncColorSamplerHelper.cpp
M  +1    -1    libs/ui/tool/strokes/kis_color_sampler_stroke_strategy.cpp

https://invent.kde.org/graphics/krita/-/commit/6ef7f97026aaa6cd7e783660e9d285302ac404e9

diff --git a/libs/ui/tool/KisAsyncColorSamplerHelper.cpp b/libs/ui/tool/KisAsyncColorSamplerHelper.cpp
index 4ad99c522a6..a70fc642215 100644
--- a/libs/ui/tool/KisAsyncColorSamplerHelper.cpp
+++ b/libs/ui/tool/KisAsyncColorSamplerHelper.cpp
@@ -731,14 +731,14 @@ QImage KisAsyncColorSamplerHelper::fetchCanvasPreview(QRect &canvasPixelRect) {
     }
 
     // If not already have a job fetching canvas image, then do it
-    if (!m_d->canvasPreviewFetchingStarted) {
+    if (!m_d->canvasPreviewFetchingStarted && m_d->cacheCanvasPreviewRect != canvasPixelRect) {
         m_d->canvasPreviewFetchingStarted = true;
         m_d->strokesFacade()->addJob(m_d->strokeId,
             new KisColorSamplerStrokeStrategy::GenerateCanvasZoomPreviewData(m_d->canvas, canvasPixelRect));
     }
 
     // Render the last frame if available
-    if (!m_d->cacheCanvasPreviewRect.isNull()) canvasPixelRect = m_d->cacheCanvasPreviewRect;
+    if (!m_d->cacheCanvasPreviewRect.isNull()) canvasPixelRect = QRect(QPoint(0,0), m_d->cacheCanvasPreviewRect.size());
 
     return m_d->cacheCanvasPreviewImage;
 }
diff --git a/libs/ui/tool/strokes/kis_color_sampler_stroke_strategy.cpp b/libs/ui/tool/strokes/kis_color_sampler_stroke_strategy.cpp
index dbf9aec6fb6..13a43057c3a 100644
--- a/libs/ui/tool/strokes/kis_color_sampler_stroke_strategy.cpp
+++ b/libs/ui/tool/strokes/kis_color_sampler_stroke_strategy.cpp
@@ -65,7 +65,7 @@ void KisColorSamplerStrokeStrategy::doStrokeCallback(KisStrokeJobData *data)
 
         QImage image = previewData->canvas->displayColorConverter()->convertImageToDisplayColorSpace(tmpDev, previewData->canvasPixelRect, true);
 
-        Q_EMIT sigCanvasZoomPreviewUpdated(image, QRect(QPoint(0,0), previewData->canvasPixelRect.size()));
+        Q_EMIT sigCanvasZoomPreviewUpdated(image, previewData->canvasPixelRect);
     }
 }