[NUI] Support ImageView and ImageVisual the SamplingMode

Let we add property for change sampling mode when we change desired size of given image. Relative dali patch https://review.tizen.org/gerrit/c/platform/core/uifw/dali-core/+/317969 https://review.tizen.org/gerrit/c/platform/core/uifw/dali-adaptor/+/317993 https://review.tizen.org/gerrit/c/platform/core/uifw/dali-toolkit/+/317992 https://review.tizen.org/gerrit/c/platform/core/uifw/dali-demo/+/318001 Signed-off-by: Eunki, Hong <[email protected]>
Samsung · Sep 24, 2024 · 7bdbe0a · 7bdbe0a
1 parent 0b18460
commit 7bdbe0a
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Showing 4 changed files with 73 additions and 1 deletion.
diff --git a/src/Tizen.NUI/src/public/BaseComponents/ImageView.cs b/src/Tizen.NUI/src/public/BaseComponents/ImageView.cs
@@ -125,6 +125,7 @@ private static string ConvertResourceUrl(ref string value)
             ImageVisualProperty.AlphaMaskURL,
             ImageVisualProperty.CropToMask,
             Visual.Property.VisualFittingMode,
+            ImageVisualProperty.SamplingMode,
             ImageVisualProperty.DesiredWidth,
             ImageVisualProperty.DesiredHeight,
             ImageVisualProperty.ReleasePolicy,
@@ -1288,6 +1289,43 @@ private FittingModeType InternalFittingMode
             }
         }
 
+        /// <summary>
+        /// Gets or sets filtering options used when resizing images to the sample original pixels.<br />
+        /// If not supplied, the default is SamplingModeType.BoxThenLinear.<br />
+        /// For normal quad images only.<br />
+        /// Optional.
+        /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public SamplingModeType SamplingMode
+        {
+            get
+            {
+                return InternalSamplingMode;
+            }
+            set
+            {
+                InternalSamplingMode = value;
+                NotifyPropertyChanged();
+            }
+        }
+        private SamplingModeType InternalSamplingMode
+        {
+            get
+            {
+                int ret = (int)SamplingModeType.BoxThenLinear;
+
+                using PropertyValue samplingMode = GetCachedImageVisualProperty(ImageVisualProperty.SamplingMode);
+                samplingMode?.Get(out ret);
+
+                return (SamplingModeType)ret;
+            }
+            set
+            {
+                using PropertyValue setValue = new PropertyValue((int)value);
+                UpdateImage(ImageVisualProperty.SamplingMode, setValue);
+            }
+        }
+
         /// <summary>
         /// This method allows users to configure the blending of two images(previous and currnet) using alpha values.
         /// </summary>

diff --git a/src/Tizen.NUI/src/public/Visuals/VisualConstants.cs b/src/Tizen.NUI/src/public/Visuals/VisualConstants.cs
@@ -199,7 +199,17 @@ public enum SamplingModeType
         /// <summary>
         /// For caching algorithms where a client strongly prefers a cache-hit to reuse a cached image.
         /// </summary>
-        DontCare
+        DontCare,
+        /// <summary>
+        /// Use Lanczos resample algorithm.
+        /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        Lanczos,
+        /// <summary>
+        /// Iteratively box filter to generate an image of 1/2, 1/4, 1/8 etc width and height and approximately the desired size, then apply Lanczos resample algorithm.
+        /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        BoxThenLanczos,
     }
 
     /// <summary>

diff --git a/src/Tizen.NUI/src/public/Visuals/VisualObject/ImageVisual.cs b/src/Tizen.NUI/src/public/Visuals/VisualObject/ImageVisual.cs
@@ -331,6 +331,28 @@ public ReleasePolicyType ReleasePolicy
             }
         }
 
+        /// <summary>
+        /// Gets or sets filtering options used when resizing images to the sample original pixels.<br />
+        /// If not supplied, the default is SamplingModeType.BoxThenLinear.<br />
+        /// For normal quad images only.<br />
+        /// Optional.
+        /// </summary>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public SamplingModeType SamplingMode
+        {
+            set
+            {
+                UpdateVisualProperty((int)Tizen.NUI.ImageVisualProperty.SamplingMode, new PropertyValue((int)value));
+            }
+            get
+            {
+                int ret = (int)SamplingModeType.BoxThenLinear;
+                var propertyValue = GetCachedVisualProperty((int)Tizen.NUI.ImageVisualProperty.SamplingMode);
+                propertyValue?.Get(out ret);
+                return (SamplingModeType)ret;
+            }
+        }
+
         /// <summary>
         /// Gets or sets the desired image width.<br />
         /// If not specified, the actual image width is used.<br />

diff --git a/test/Tizen.NUI.Samples/Tizen.NUI.Samples/Samples/VisualTest.cs b/test/Tizen.NUI.Samples/Tizen.NUI.Samples/Samples/VisualTest.cs
@@ -314,6 +314,8 @@ private View CreateViewWithVisual(int id)
 
                 SynchronousSizing = true,
 
+                SamplingMode = SamplingModeType.BoxThenLanczos,
+
                 OffsetXPolicy = VisualTransformPolicyType.Absolute,
                 OffsetYPolicy = VisualTransformPolicyType.Absolute,
                 WidthPolicy = VisualTransformPolicyType.Absolute,