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Displaying Bitmaps Efficiently Training - Fix inSampleSize selection

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When computing inSampleSize, calculateInSampleSize() needs to compare
height/width ratios, rather than raw values.

Bug: 7951398
Change-Id: I207f9abc2aae4cc569b406bac237e221d8e64d1e
This commit is contained in:
Adam Koch
2013-01-09 16:58:59 -05:00
parent cdf5106aaf
commit 0bb4dade30
2 changed files with 10 additions and 5 deletions
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docs/downloads/training/BitmapFun.zip
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docs/html/training/displaying-bitmaps/load-bitmap.jd
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@@ -110,12 +110,17 @@ public static int calculateInSampleSize(
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float)height / (float)reqHeight);
} else {
inSampleSize = Math.round((float)width / (float)reqWidth);
}
// Calculate ratios of height and width to requested height and width
final int heightRatio = Math.round((float) height / (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
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