v1.3.0

public/CHANGELOG.md

@@ -1,5 +1,10 @@
 All notable changes to this project will be documented in this file.
 
+## [1.3.0] - 2025-04-06
+
+### Fixed
+- 📄 When importing a spritesheet, the tool will now remove transparent from the edges of each sprite so you can move them inside their cells.
+
 ## [1.2.0] - 2025-04-06
 
 ### Added

src/App.vue

@@ -98,6 +98,14 @@
     y: number;
   }
 
+  interface SpriteFile {
+    file: File;
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+  }
+
   const sprites = ref<Sprite[]>([]);
   const columns = ref(4);
   const isPreviewModalOpen = ref(false);
@@ -261,9 +269,31 @@
   };
 
   // Handle the split spritesheet result
-  const handleSplitSpritesheet = (files: File[]) => {
-    // Process the split sprite files
-    processImageFiles(files);
+  const handleSplitSpritesheet = (spriteFiles: SpriteFile[]) => {
+    // Process sprite files with their positions
+    Promise.all(
+      spriteFiles.map(spriteFile => {
+        return new Promise<Sprite>(resolve => {
+          const url = URL.createObjectURL(spriteFile.file);
+          const img = new Image();
+          img.onload = () => {
+            resolve({
+              id: crypto.randomUUID(),
+              file: spriteFile.file,
+              img,
+              url,
+              width: img.width,
+              height: img.height,
+              x: spriteFile.x, // Use the position from the splitter
+              y: spriteFile.y, // Use the position from the splitter
+            });
+          };
+          img.src = url;
+        });
+      })
+    ).then(newSprites => {
+      sprites.value = [...sprites.value, ...newSprites];
+    });
   };
 
   // Export spritesheet as JSON with base64 images

src/components/SpritesheetSplitter.vue

@@ -84,9 +84,17 @@
 
   const emit = defineEmits<{
     (e: 'close'): void;
-    (e: 'split', sprites: File[]): void;
+    (e: 'split', sprites: SpriteFile[]): void; // Change from File[] to SpriteFile[]
   }>();
 
+  interface SpriteFile {
+    file: File;
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+  }
+
   // Get settings from store
   const settingsStore = useSettingsStore();
 
@@ -155,6 +163,46 @@
     }
   }
 
+  function getSpriteBoundingBox(ctx: CanvasRenderingContext2D, width: number, height: number) {
+    const imageData = ctx.getImageData(0, 0, width, height);
+    const data = imageData.data;
+
+    let minX = width;
+    let minY = height;
+    let maxX = 0;
+    let maxY = 0;
+    let hasContent = false;
+
+    // Scan through all pixels to find the bounding box
+    for (let y = 0; y < height; y++) {
+      for (let x = 0; x < width; x++) {
+        const idx = (y * width + x) * 4;
+        // Check if pixel is not transparent (alpha > 0)
+        if (data[idx + 3] > 10) {
+          // Allow some tolerance for compression artifacts
+          minX = Math.min(minX, x);
+          minY = Math.min(minY, y);
+          maxX = Math.max(maxX, x);
+          maxY = Math.max(maxY, y);
+          hasContent = true;
+        }
+      }
+    }
+
+    // If no non-transparent pixels found, return null
+    if (!hasContent) {
+      return null;
+    }
+
+    // Return bounding box with a small padding
+    return {
+      x: Math.max(0, minX - 1),
+      y: Math.max(0, minY - 1),
+      width: Math.min(width, maxX - minX + 3), // +1 for inclusive bounds, +2 for padding
+      height: Math.min(height, maxY - minY + 3),
+    };
+  }
+
   // Split spritesheet manually based on rows and columns
   async function splitSpritesheet(img: HTMLImageElement, rows: number, columns: number) {
     const spriteWidth = Math.floor(img.width / columns);
@@ -162,10 +210,15 @@
 
     const sprites: SpritePreview[] = [];
 
-    // Create a canvas for processing
+    // Create a canvas for processing the full sprite
     const canvas = document.createElement('canvas');
     const ctx = canvas.getContext('2d');
-    if (!ctx) return;
+
+    // Create a second canvas for the cropped sprite
+    const croppedCanvas = document.createElement('canvas');
+    const croppedCtx = croppedCanvas.getContext('2d');
+
+    if (!ctx || !croppedCtx) return;
 
     canvas.width = spriteWidth;
     canvas.height = spriteHeight;
@@ -184,15 +237,43 @@
 
         // If we're not removing empty sprites or the sprite is not empty
         if (!removeEmpty.value || !isEmpty) {
-          // Convert to data URL
-          const url = canvas.toDataURL('image/png');
+          // Get bounding box of non-transparent pixels
+          const boundingBox = getSpriteBoundingBox(ctx, spriteWidth, spriteHeight);
+
+          let url;
+          let x = 0; // Default position (will be updated if we have a bounding box)
+          let y = 0;
+          let width = spriteWidth;
+          let height = spriteHeight;
+
+          if (boundingBox) {
+            // The key change: preserve the original position where the sprite was found
+            x = boundingBox.x;
+            y = boundingBox.y;
+            width = boundingBox.width;
+            height = boundingBox.height;
+
+            // Set dimensions for the cropped sprite
+            croppedCanvas.width = boundingBox.width;
+            croppedCanvas.height = boundingBox.height;
+
+            // Draw only the non-transparent part
+            croppedCtx.clearRect(0, 0, croppedCanvas.width, croppedCanvas.height);
+            croppedCtx.drawImage(canvas, boundingBox.x, boundingBox.y, boundingBox.width, boundingBox.height, 0, 0, boundingBox.width, boundingBox.height);
+
+            // Convert to data URL
+            url = croppedCanvas.toDataURL('image/png');
+          } else {
+            // No non-transparent pixels found, use the original sprite
+            url = canvas.toDataURL('image/png');
+          }
 
           sprites.push({
             url,
-            x: 0,
-            y: 0,
-            width: spriteWidth,
-            height: spriteHeight,
+            x,
+            y,
+            width,
+            height,
             isEmpty,
           });
         }
@@ -298,8 +379,8 @@
   }
 
   // Convert preview sprites to actual files
-  async function createSpriteFiles(): Promise<File[]> {
-    const files: File[] = [];
+  async function createSpriteFiles(): Promise<SpriteFile[]> {
+    const spriteFiles: SpriteFile[] = [];
 
     for (let i = 0; i < previewSprites.value.length; i++) {
       const sprite = previewSprites.value[i];
@@ -312,10 +393,17 @@
       const fileName = `sprite_${i + 1}.png`;
       const file = new File([blob], fileName, { type: 'image/png' });
 
-      files.push(file);
+      // Create sprite file with position information
+      spriteFiles.push({
+        file,
+        x: sprite.x,
+        y: sprite.y,
+        width: sprite.width,
+        height: sprite.height,
+      });
     }
 
-    return files;
+    return spriteFiles;
   }
 
   // Actions