Fix frames being read out of bounds

Author: soir20

common/src/main/java/io/github/moremcmeta/animationplugin/metadata/AnimationMetadataAnalyzer.java

@@ -225,10 +225,12 @@ private AnimationMetadata readAnimationProperties(MetadataView metadata, int ima
     private List<Frame> findFrames(NativeImage texture, int frameWidth, int frameHeight) {
         List<Frame> frames = new ArrayList<>();
 
-        for (int minY = 0; minY < texture.getHeight(); minY += frameHeight) {
-            for (int minX = 0; minX < texture.getWidth(); minX += frameWidth) {
-                int finalMinX = minX;
-                int finalMinY = minY;
+        int framesY = texture.getHeight() / frameHeight;
+        int framesX = texture.getWidth() / frameWidth;
+        for (int frameY = 0; frameY < framesY; frameY++) {
+            for (int frameX = 0; frameX < framesX; frameX++) {
+                int finalMinX = frameX * frameWidth;
+                int finalMinY = frameY * frameHeight;
                 frames.add((x, y) -> texture.getPixelRGBA(finalMinX + x, finalMinY + y));
             }
         }

common/src/test/java/io/github/moremcmeta/animationplugin/metadata/AnimationMetadataAnalyzerTest.java

@@ -1066,7 +1066,7 @@ public void analyze_HasPartsFrameWidthNotMultipleOfPartSize_InvalidMetadataExcep
                         "0", new MockMetadataView(ImmutableMap.of(
                                 "width", 4,
                                 "height", 10,
-                                "texture", MOCK_TEXTURE.apply(10, 20),
+                                "texture", MOCK_TEXTURE.apply(10, 22),
                                 "x", 0,
                                 "y", 0
                         ))
@@ -1081,6 +1081,7 @@ public void analyze_HasPartsFrameWidthNotMultipleOfPartSize_InvalidMetadataExcep
         assertEquals(10, metadata.parts().get(0).frameHeight());
         assertEquals(0, metadata.parts().get(0).xInBase());
         assertEquals(0, metadata.parts().get(0).yInBase());
+        assertEquals(4, metadata.parts().get(0).partFrames().orElseThrow().size());
     }
 
     @Test