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mobile/ebitenmobileview: Bug fix: Use Math.floor to shrink the size a little bit

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Fixes #956
This commit is contained in:
Hajime Hoshi 2019-10-17 11:31:47 +09:00
parent 43a8881ab8
commit bf07ead6ae
3 changed files with 12 additions and 14 deletions
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18
cmd/ebitenmobile/gobind.go
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@ -377,20 +377,16 @@ public class EbitenView extends ViewGroup {
initialized_ = true;
}
int widthInDp = (int)Math.floor(pxToDp(right - left));
int heightInDp = (int)Math.floor(pxToDp(bottom - top));
int widthInDp = (int)Math.ceil(pxToDp(right - left));
int heightInDp = (int)Math.ceil(pxToDp(bottom - top));
Ebitenmobileview.layout(widthInDp, heightInDp, new ViewRectSetter() {
@Override
public void setViewRect(long xInDp, long yInDp, long widthInDp, long heightInDp) {
int width = (int)Math.ceil(dpToPx(widthInDp));
int height = (int)Math.ceil(dpToPx(heightInDp));
int x = (int)Math.ceil(dpToPx(xInDp));
int y = (int)Math.ceil(dpToPx(yInDp));
// Use even numbers to avoid glitches (#956).
final int xInPx = x / 2 * 2;
final int yInPx = y / 2 * 2;
final int widthInPx = width / 2 * 2;
final int heightInPx = height / 2 * 2;
// Use Math.floor to use smaller and safer values, or glitches can appear (#956).
final int widthInPx = (int)Math.floor(dpToPx(widthInDp));
final int heightInPx = (int)Math.floor(dpToPx(heightInDp));
final int xInPx = (int)Math.floor(dpToPx(xInDp));
final int yInPx = (int)Math.floor(dpToPx(yInDp));
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {

2
cmd/ebitenmobile/gobind.src.go
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File diff suppressed because one or more lines are too long

6
mobile/ebitenmobileview/funcs.go
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@ -49,8 +49,10 @@ func layout(viewWidth, viewHeight int, viewRectSetter ViewRectSetter) {
scaleY := float64(viewHeight) / float64(h)
scale := math.Min(scaleX, scaleY)
width := int(math.Ceil(float64(w) * scale))
height := int(math.Ceil(float64(h) * scale))
// To convert a logical offscreen size to the actual screen size, use Math.floor to use smaller and safer
// values, or glitches can appear (#956).
width := int(math.Floor(float64(w) * scale))
height := int(math.Floor(float64(h) * scale))
x := (viewWidth - width) / 2
y := (viewHeight - height) / 2