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Bug 593275 part 2 - Dynamically recompute drawWindow flags, in case our window is asynchronously resized on us. r=dbaron a=blocking2.0:beta6+

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This commit is contained in:
Robert O'Callahan 2010-09-04 23:39:35 -04:00
parent 35d8542aa1
commit 1507349168
1 changed files with 31 additions and 16 deletions
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47
layout/tools/reftest/reftest.js
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@ -1000,25 +1000,40 @@ function UpdateCanvasCache(url, canvas)
}
}
// Compute drawWindow flags lazily so the window is set up and can be
// measured accurately
// Recompute drawWindow flags for every drawWindow operation.
// We have to do this every time since our window can be
// asynchronously resized (e.g. by the window manager, to make
// it fit on screen) at unpredictable times.
// Fortunately this is pretty cheap.
function DoDrawWindow(ctx, x, y, w, h)
{
if (typeof gDrawWindowFlags == "undefined") {
gDrawWindowFlags = ctx.DRAWWINDOW_DRAW_CARET |
ctx.DRAWWINDOW_DRAW_VIEW;
var flags = "DRAWWINDOW_DRAW_CARET | DRAWWINDOW_DRAW_VIEW";
var r = gBrowser.getBoundingClientRect();
if (window.innerWidth >= r.right && window.innerHeight >= r.bottom) {
// We can use the window's retained layers
// because the window is big enough to display the entire browser element
gDrawWindowFlags |= ctx.DRAWWINDOW_USE_WIDGET_LAYERS;
flags += " | DRAWWINDOW_USE_WIDGET_LAYERS";
var flags = ctx.DRAWWINDOW_DRAW_CARET | ctx.DRAWWINDOW_DRAW_VIEW;
var testRect = gBrowser.getBoundingClientRect();
if (0 <= testRect.left &&
0 <= testRect.top &&
window.innerWidth >= testRect.right &&
window.innerHeight >= testRect.bottom) {
// We can use the window's retained layer manager
// because the window is big enough to display the entire
// browser element
flags |= ctx.DRAWWINDOW_USE_WIDGET_LAYERS;
}
if (gDrawWindowFlags != flags) {
// Every time the flags change, dump the new state.
gDrawWindowFlags = flags;
var flagsStr = "DRAWWINDOW_DRAW_CARET | DRAWWINDOW_DRAW_VIEW";
if (flags & ctx.DRAWWINDOW_USE_WIDGET_LAYERS) {
flagsStr += " | DRAWWINDOW_USE_WIDGET_LAYERS";
} else {
// Output a special warning because we need to be able to detect
// this whenever it happens.
dump("REFTEST INFO | WARNING: USE_WIDGET_LAYERS disabled\n");
}
dump("REFTEST INFO | drawWindow flags = " + flags +
"; window.innerWidth/Height = " + window.innerWidth + "," +
window.innerHeight + "; browser.width/height = " +
r.width + "," + r.height + "\n");
dump("REFTEST INFO | drawWindow flags = " + flagsStr +
"; window size = " + window.innerWidth + "," + window.innerHeight +
"; test browser size = " + testRect.width + "," + testRect.height +
"\n");
}
ctx.drawWindow(window, x, y, w, h, "rgb(255,255,255)",