Remove the unused js_CoerceArrayToCanvasImageData. rs=luke

This commit is contained in:
Jeff Walden
2011-06-09 01:12:28 -07:00
parent ce01506acc
commit 8c57048d2e
2 changed files with 0 additions and 78 deletions

View File

@@ -3205,64 +3205,6 @@ js_ArrayInfo(JSContext *cx, uintN argc, jsval *vp)
}
#endif
JS_FRIEND_API(JSBool)
js_CoerceArrayToCanvasImageData(JSObject *obj, jsuint offset, jsuint count,
JSUint8 *dest)
{
uint32 length;
if (!obj || !obj->isDenseArray())
return JS_FALSE;
length = obj->getArrayLength();
if (length < offset + count)
return JS_FALSE;
JSUint8 *dp = dest;
for (uintN i = offset; i < offset+count; i++) {
const Value &v = obj->getDenseArrayElement(i);
if (v.isInt32()) {
jsint vi = v.toInt32();
if (jsuint(vi) > 255)
vi = (vi < 0) ? 0 : 255;
*dp++ = JSUint8(vi);
} else if (v.isDouble()) {
jsdouble vd = v.toDouble();
if (!(vd >= 0)) /* Not < so that NaN coerces to 0 */
*dp++ = 0;
else if (vd > 255)
*dp++ = 255;
else {
jsdouble toTruncate = vd + 0.5;
JSUint8 val = JSUint8(toTruncate);
/*
* now val is rounded to nearest, ties rounded up. We want
* rounded to nearest ties to even, so check whether we had a
* tie.
*/
if (val == toTruncate) {
/*
* It was a tie (since adding 0.5 gave us the exact integer
* we want). Since we rounded up, we either already have an
* even number or we have an odd number but the number we
* want is one less. So just unconditionally masking out the
* ones bit should do the trick to get us the value we
* want.
*/
*dp++ = (val & ~1);
} else {
*dp++ = val;
}
}
} else {
return JS_FALSE;
}
}
return JS_TRUE;
}
JS_FRIEND_API(JSBool)
js_IsDensePrimitiveArray(JSObject *obj)
{