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When scrolling, force a full redraw not only when the scroll offset changes

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but also on the first frame where it doesn't. This is necessary because
parallax layers may be drawn on the *old* scroll offset (for reasons
unknown to me).

To see the bug, walk right from the first screen until you reach the tree.
Notice how the part of the tree you walk behind gets redrawn slightly to
the left.

svn-id: r13120
This commit is contained in:
Torbjörn Andersson 2004-03-01 08:04:10 +00:00
parent 85f888e582
commit 82c451774c
1 changed files with 5 additions and 0 deletions
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5
sword1/screen.cpp
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@ -70,6 +70,11 @@ void Screen::setScrolling(int16 offsetX, int16 offsetY) {
Logic::_scriptVars[SCROLL_FLAG] = 1;
_fullRefresh = true;
} else if (Logic::_scriptVars[SCROLL_FLAG] == 1) {
// Because parallax layers may be drawn on the old scroll offset, we
// want a full refresh not only when the scroll offset changes, but
// also on the frame where they become the same.
if (_oldScrollX != Logic::_scriptVars[SCROLL_OFFSET_X] || _oldScrollY != Logic::_scriptVars[SCROLL_OFFSET_Y])
_fullRefresh = true;
_oldScrollX = Logic::_scriptVars[SCROLL_OFFSET_X];
_oldScrollY = Logic::_scriptVars[SCROLL_OFFSET_Y];
int32 distX = inRange(-MAX_SCROLL_DISTANCE, _oldScrollX - offsetX, MAX_SCROLL_DISTANCE);