Someone probably figured "since the data is all initialized to 0 to
begin with, we can skip 0 values". However, it's possible to temporarily
set a value to other than 0 and then back to 0, a fully valid use case
that we need to support.
Task-number: QTBUG-29065
Change-Id: Ia9f0803743d696ca8b9cca89c666ccba80a3abd0
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
QV8Context2DPixelArrayResource *r = v8_resource_cast<QV8Context2DPixelArrayResource>(info.This());
const int v = value->Uint32Value();
- if (r && index < static_cast<quint32>(r->image.width() * r->image.height() * 4) && v > 0 && v <= 255) {
+ if (r && index < static_cast<quint32>(r->image.width() * r->image.height() * 4) && v >= 0 && v <= 255) {
const quint32 w = r->image.width();
const quint32 row = (index / 4) / w;
const quint32 col = (index / 4) % w;
import QtQuick 2.0
+import QtTest 1.0
CanvasTestCase {
id:testCase
function test_createImageData(row) {
var canvas = createCanvasObject(row);
var ctx = canvas.getContext('2d');
+ var imageData = ctx.createImageData(1, 1);
+ var imageDataValues = imageData.data;
+ imageDataValues[0] = 255;
+ imageDataValues[0] = 0;
+ if (imageDataValues[0] != 0)
+ qtest_fail('ImageData value access fail, expecting 0, got ' + imageDataValues[0]);
+
ctx.reset();
canvas.destroy()
}