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ui: Panic if Layout returns non-positive numbers

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This commit is contained in:
Hajime Hoshi 2019-12-23 04:43:04 +09:00
parent 049aa552d4
commit 1d9c00688c
2 changed files with 6 additions and 1 deletions
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4
run.go
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@ -36,7 +36,9 @@ type Game interface {
//
// The screen scale is automatically adjusted to fit the outside.
//
// Layout is called at an initialization and whenever the outside size is changed.
// Layout is called almost every frame.
//
// If Layout returns non-positive numbers, the caller can panic.
//
// You can return a fixed screen size if you don't care, or you can also return a calculated screen size
// adjusted with the given outside size.

3
uicontext.go
View File

@ -147,6 +147,9 @@ func (c *uiContext) Layout(outsideWidth, outsideHeight float64) {
func (c *uiContext) updateOffscreen() {
sw, sh := c.game.Layout(int(c.outsideWidth), int(c.outsideHeight))
if sw <= 0 || sh <= 0 {
panic("ebiten: Layout must return positive numbers")
}
if c.offscreen != nil && !c.outsideSizeUpdated {
if w, h := c.offscreen.Size(); w == sw && h == sh {