products/Sources/formale Sprachen/C/Firefox/dom/canvas/test/test_2d.drawImage.zerocanvas.html
<!
DOCTYPE HTML >
<
title >
Canvas test:
2 d.drawImage.zerocanvas</
title >
<
script src=
"/tests/SimpleTest/SimpleTest.js" ></
script >
<
link rel=
"stylesheet" href=
"/tests/SimpleTest/test.css" >
<
body >
<
canvas id=
"c" width=
"100" height=
"50" ><p class=
"fallback" >FAIL (fallback content)</p></
canvas >
<
script >
function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
var pixel = ctx.getImageData(x, y,
1 ,
1 );
var pr = pixel.data[
0 ],
pg = pixel.data[
1 ],
pb = pixel.data[
2 ],
pa = pixel.data[
3 ];
ok(r-d <= pr && pr <= r+d &&
g-d <= pg && pg <= g+d &&
b-d <= pb && pb <= b+d &&
a-d <= pa && pa <= a+d,
"pixel " +pos+
" is " +pr+
"," +pg+
"," +pb+
"," +pa+
"; expected " +colour+
" +/- " +d);
}
SimpleTest.waitForExplicitFinish();
addLoadEvent(function () {
var canvas = document.getElementById(
'c' );
var ctx =
canvas .getContext(
'2d' );
ctx.fillStyle =
'#0f0' ;
ctx.fillRect(
0 ,
0 ,
100 ,
50 );
var canvas2 = document.createElement(
'canvas' );
canvas2.width =
0 ;
canvas2.height =
10 ;
var _thrown = undefined; try {
ctx.drawImage(canvas2,
0 ,
0 );
} catch (e) { _thrown = e }; ok(_thrown && _thrown.name ==
"InvalidStateError" && _thrown.
code == DO
MException.INVALID_STATE_ERR, "should throw InvalidStateError" );10 ;0 ;var _thrown = undefined; try {0 , 0 );"InvalidStateError" && _thrown.code == DOMException.INVALID_STATE_ERR, "should throw InvalidStateError" );0 ;0 ;var _thrown = undefined; try {0 , 0 );"InvalidStateError" && _thrown.code == DOMException.INVALID_STATE_ERR, "should throw InvalidStateError" );50 ,25 , 0 ,255 ,0 ,255 , "50,25" , "0,255,0,255" , 2 );script > Messung V0.5 in Prozent C=100 H=100 G=100
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(vorverarbeitet am 2026-06-09)
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