图片优化

Assets/Resource/TextureScaler.unity

@@ -115,8 +115,12 @@ MonoBehaviour:
   CurIndex: 0
   CurImage: {fileID: 0}
   CurSR: {fileID: 1663099055}
+  InputField: {fileID: 1133883668}
   Camera: {fileID: 39160617}
   ExamParent: {fileID: 1504970773}
+  OriginSprite: {fileID: 21300000, guid: 8be90607a97ac7842867d389e30c43ea, type: 3}
+  OriginTexture: {fileID: 2800000, guid: 8be90607a97ac7842867d389e30c43ea, type: 3}
+  OriginSize: {x: 1, y: 1, z: 1}
 --- !u!1 &165051606
 GameObject:
   m_ObjectHideFlags: 0
@@ -2532,7 +2536,7 @@ MonoBehaviour:
     m_PersistentCalls:
       m_Calls:
       - m_Target: {fileID: 39160619}
-        m_MethodName: Test
+        m_MethodName: Scale
         m_Mode: 1
         m_Arguments:
           m_ObjectArgument: {fileID: 0}

Assets/Script/Tool/TextureExam.cs

@@ -9,8 +9,12 @@ public class TextureExam : MonoBehaviour
     public int CurIndex;
     public Image CurImage;
     public SpriteRenderer CurSR;
+    public InputField InputField;
     public Camera Camera;
     public Transform ExamParent;
+    public Sprite OriginSprite;
+    public Texture2D OriginTexture;
+    public Vector3 OriginSize;
 
     public void ZoomIn()
     {
@@ -67,11 +71,18 @@ public class TextureExam : MonoBehaviour
 
             if (CurImage != null)
             {
+                OriginSprite = CurImage.sprite;
+                OriginTexture = CurImage.sprite.texture;
+
                 CurImage.SetActive(true);
             }
 
             if (CurSR != null)
             {
+                OriginSize = CurSR.transform.localScale;
+                OriginSprite = CurSR.sprite;
+                OriginTexture = CurSR.sprite.texture;
+
                 CurSR.SetActive(true);
             }
         }
@@ -97,13 +108,111 @@ public class TextureExam : MonoBehaviour
 
             if (CurImage != null)
             {
+                OriginSprite = CurImage.sprite;
+                OriginTexture = CurImage.sprite.texture;
+
                 CurImage.SetActive(true);
             }
 
             if (CurSR != null)
             {
+                OriginSize = CurSR.transform.localScale;
+                OriginSprite = CurSR.sprite;
+                OriginTexture = CurSR.sprite.texture;
+
                 CurSR.SetActive(true);
             }
         }
     }
+
+    public void Scale()
+    {
+        float factor = float.Parse(InputField.text);
+
+        Texture2D newTexture = ScaleTextureCore(1, factor, OriginTexture);
+
+        newTexture.Apply();
+        
+        Vector2 pivot = new Vector2(OriginSprite.pivot.x/OriginSprite.rect.width, OriginSprite.pivot.y / OriginSprite.rect.height);
+        Sprite newSprite = Sprite.Create(newTexture, new Rect(0, 0, newTexture.width, newTexture.height), pivot, OriginSprite.pixelsPerUnit, 1, SpriteMeshType.Tight, OriginSprite.border);
+
+        if (CurSR != null)
+        {
+            CurSR.sprite = newSprite;
+            CurSR.transform.localScale = OriginSize/factor;
+        }
+
+        if (CurImage != null)
+        {
+            CurImage.sprite = newSprite;
+        }
+    }
+
+
+    protected Texture2D ScaleTextureCore(int padding, float factor, Texture2D sourceTexture)
+    {
+        if (factor.Equal(1))
+        {
+            Texture2D texture2D = new Texture2D(sourceTexture.width, sourceTexture.height);
+
+            texture2D.SetPixels(sourceTexture.GetPixels());
+
+            return texture2D;
+        }
+
+        Texture2D texture = AddPaddingToTexture(padding, sourceTexture);
+
+        int originWidth = texture.width;
+        int originHeight = texture.height;
+
+        int newWidth = (int)(originWidth * factor);
+        int newHeight = (int)(originHeight * factor);
+
+        Texture2D newTexture = new Texture2D(newWidth, newHeight);
+
+        Color[] newColors = new Color[newWidth * newHeight];
+
+        for (int i = 0; i < newHeight; i++)
+        {
+            for (int j = 0; j < newWidth; j++)
+            {
+                newColors[i*newWidth + j] = texture.GetPixelBilinear((j + 0.5f)/newWidth, (i + 0.5f)/newHeight);
+            }
+        }
+
+        newTexture.SetPixels(newColors);
+
+        return newTexture;
+    }
+
+    protected Texture2D AddPaddingToTexture(int padding, Texture2D texture)
+    {
+        if (padding == 0)
+        {
+            return texture;
+        }
+
+        int originWidth = texture.width;
+        int originHeight = texture.height;
+
+        int newWidth = originWidth + 2 * padding;
+        int newHeight = originHeight + 2 * padding;
+
+        Texture2D newTexture = new Texture2D(newWidth, newHeight);
+
+        Color[] newColors = new Color[newWidth * newHeight];
+        Color[] originColors = texture.GetPixels();
+
+        for (int i = 0; i < originHeight; i++)
+        {
+            for (int j = 0; j < originWidth; j++)
+            {
+                newColors[(i + padding) * newWidth + (j + padding)] = originColors[i * originWidth + j];
+            }
+        }
+
+        newTexture.SetPixels(newColors);
+
+        return newTexture;
+    }
 }

ProjectSettings/EditorBuildSettings.asset

@@ -9,3 +9,5 @@ EditorBuildSettings:
     path: Assets/Resource/Logo.unity
   - enabled: 1
     path: Assets/Resource/Garden.unity
+  - enabled: 0
+    path: Assets/Resource/TextureScaler.unity

ToDoList.txt

@@ -28,6 +28,8 @@ DragonBone图片
 
 图集
 {
+  当ScaleFactor=1时New一个Texture返回
+
   把网络得到的小图合并为图集(运行效率)
 
   更新unitypackage