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Revert "ebiten: Do not skip Draw when vsync is disabled"

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This reverts commit 7dda2d8e4b.

Reason: #1595: FPS doesn't match with the number of Draw calls per second when vsync is off.

Updates #1520
Closes #1595
This commit is contained in:
Hajime Hoshi 2021-04-19 11:33:34 +09:00
parent dcaa1f9722
commit 7e1943dba7
1 changed files with 4 additions and 7 deletions
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11
uicontext.go
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@ -200,16 +200,13 @@ func (c *uiContext) update(updateCount int) error {
uiDriver().ResetForFrame()
}
// Even though updateCount == 0, the offscreen is cleared and Draw is called when vscync is enabled.
// Even though updateCount == 0, the offscreen is cleared and Draw is called.
// Draw should not update the game state and then the screen should not be updated without Update, but
// users might want to process something at Draw with the time intervals of FPS.
// When vsync is disabled, as performance matters, skip calling Draw when possible (#1520).
if updateCount > 0 || IsVsyncEnabled() {
if IsScreenClearedEveryFrame() {
c.offscreen.Clear()
}
c.game.Draw(c.offscreen)
if IsScreenClearedEveryFrame() {
c.offscreen.Clear()
}
c.game.Draw(c.offscreen)
// This clear is needed for fullscreen mode or some mobile platforms (#622).
c.screen.Clear()