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Fix CropTransformation for use case with width = 0 and height = 0 #201

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Fix CropTransformation for use case with width = 0 and height = 0 #201

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28 changes: 14 additions & 14 deletions transformations/src/main/java/jp/wasabeef/glide/transformations/CropTransformation.java
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@

public class CropTransformation extends BitmapTransformation {

private static final int VERSION = 1;
private static final int VERSION = 2;
private static final String ID = "jp.wasabeef.glide.transformations.CropTransformation." + VERSION;

public enum CropType {
Expand All @@ -38,10 +38,9 @@ public enum CropType {
BOTTOM
}

private int width;
private int height;

private CropType cropType = CropType.CENTER;
final private int width;
final private int height;
final private CropType cropType;

public CropTransformation(int width, int height) {
this(width, height, CropType.CENTER);
Expand All @@ -56,24 +55,25 @@ public CropTransformation(int width, int height, CropType cropType) {
@Override
protected Bitmap transform(@NonNull Context context, @NonNull BitmapPool pool,
@NonNull Bitmap toTransform, int outWidth, int outHeight) {
int toWidth, toHeight;

width = width == 0 ? toTransform.getWidth() : width;
height = height == 0 ? toTransform.getHeight() : height;
toWidth = width == 0 ? outWidth : width;
toHeight = height == 0 ? outHeight : height;

Bitmap.Config config =
toTransform.getConfig() != null ? toTransform.getConfig() : Bitmap.Config.ARGB_8888;
Bitmap bitmap = pool.get(width, height, config);

bitmap.setHasAlpha(true);

float scaleX = (float) width / toTransform.getWidth();
float scaleY = (float) height / toTransform.getHeight();
float scaleX = (float) toWidth / toTransform.getWidth();
float scaleY = (float) toHeight / toTransform.getHeight();
float scale = Math.max(scaleX, scaleY);

float scaledWidth = scale * toTransform.getWidth();
float scaledHeight = scale * toTransform.getHeight();
float left = (width - scaledWidth) / 2;
float top = getTop(scaledHeight);
float left = (toWidth - scaledWidth) / 2;
float top = getTop(toHeight, scaledHeight);
RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);

setCanvasBitmapDensity(toTransform, bitmap);
Expand All @@ -84,14 +84,14 @@ protected Bitmap transform(@NonNull Context context, @NonNull BitmapPool pool,
return bitmap;
}

private float getTop(float scaledHeight) {
private float getTop(float toHeight, float scaledHeight) {
switch (cropType) {
case TOP:
return 0;
case CENTER:
return (height - scaledHeight) / 2;
return (toHeight - scaledHeight) / 2;
case BOTTOM:
return height - scaledHeight;
return toHeight - scaledHeight;
default:
return 0;
}
Expand Down