/usr/include/firefox/CustomQS_Canvas2D.h is in firefox-dev 11.0+build1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Gecko code.
*
* The Initial Developer of the Original Code is
* the Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com> (original author)
* Ms2ger <ms2ger@gmail.com>
* Yury <async.processingjs@yahoo.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsDOMError.h"
#include "nsIDOMCanvasRenderingContext2D.h"
#include "CheckedInt.h"
#include "nsMathUtils.h"
typedef NS_STDCALL_FUNCPROTO(nsresult, CanvasStyleSetterType, nsIDOMCanvasRenderingContext2D,
SetStrokeStyle_multi, (const nsAString &, nsISupports *));
typedef NS_STDCALL_FUNCPROTO(nsresult, CanvasStyleGetterType, nsIDOMCanvasRenderingContext2D,
GetStrokeStyle_multi, (nsAString &, nsISupports **, PRInt32 *));
static JSBool
Canvas2D_SetStyleHelper(JSContext *cx, JSObject *obj, jsid id, jsval *vp,
CanvasStyleSetterType setfunc)
{
XPC_QS_ASSERT_CONTEXT_OK(cx);
nsIDOMCanvasRenderingContext2D *self;
xpc_qsSelfRef selfref;
js::AutoValueRooter tvr(cx);
if (!xpc_qsUnwrapThis(cx, obj, nsnull, &self, &selfref.ptr, tvr.jsval_addr(), nsnull))
return JS_FALSE;
nsresult rv = NS_OK;
if (JSVAL_IS_STRING(*vp)) {
xpc_qsDOMString arg0(cx, *vp, vp,
xpc_qsDOMString::eDefaultNullBehavior,
xpc_qsDOMString::eDefaultUndefinedBehavior);
if (!arg0.IsValid())
return JS_FALSE;
rv = (self->*setfunc)(arg0, nsnull);
} else {
nsISupports *arg0;
xpc_qsSelfRef arg0ref;
rv = xpc_qsUnwrapArg<nsISupports>(cx, *vp, &arg0, &arg0ref.ptr, vp);
if (NS_FAILED(rv)) {
xpc_qsThrowBadSetterValue(cx, rv, JSVAL_TO_OBJECT(*tvr.jsval_addr()), id);
return JS_FALSE;
}
nsString voidStr;
voidStr.SetIsVoid(true);
rv = (self->*setfunc)(voidStr, arg0);
}
if (NS_FAILED(rv))
return xpc_qsThrowGetterSetterFailed(cx, rv, JSVAL_TO_OBJECT(*tvr.jsval_addr()), id);
return JS_TRUE;
}
static JSBool
Canvas2D_GetStyleHelper(JSContext *cx, JSObject *obj, jsid id, jsval *vp,
CanvasStyleGetterType getfunc)
{
XPC_QS_ASSERT_CONTEXT_OK(cx);
nsIDOMCanvasRenderingContext2D *self;
xpc_qsSelfRef selfref;
XPCLazyCallContext lccx(JS_CALLER, cx, obj);
if (!xpc_qsUnwrapThis(cx, obj, nsnull, &self, &selfref.ptr, vp, &lccx))
return JS_FALSE;
nsresult rv;
nsString resultString;
nsCOMPtr<nsISupports> resultInterface;
PRInt32 resultType;
rv = (self->*getfunc)(resultString, getter_AddRefs(resultInterface), &resultType);
if (NS_FAILED(rv))
return xpc_qsThrowGetterSetterFailed(cx, rv, JSVAL_TO_OBJECT(*vp), id);
switch (resultType) {
case nsIDOMCanvasRenderingContext2D::CMG_STYLE_STRING:
return xpc_qsStringToJsval(cx, resultString, vp);
case nsIDOMCanvasRenderingContext2D::CMG_STYLE_PATTERN:
{
qsObjectHelper helper(resultInterface,
xpc_qsGetWrapperCache(resultInterface));
return xpc_qsXPCOMObjectToJsval(lccx, helper,
&NS_GET_IID(nsIDOMCanvasPattern),
&interfaces[k_nsIDOMCanvasPattern], vp);
}
case nsIDOMCanvasRenderingContext2D::CMG_STYLE_GRADIENT:
{
qsObjectHelper helper(resultInterface,
xpc_qsGetWrapperCache(resultInterface));
return xpc_qsXPCOMObjectToJsval(lccx, helper,
&NS_GET_IID(nsIDOMCanvasGradient),
&interfaces[k_nsIDOMCanvasGradient], vp);
}
default:
return xpc_qsThrowGetterSetterFailed(cx, NS_ERROR_FAILURE, JSVAL_TO_OBJECT(*vp), id);
}
}
static JSBool
nsIDOMCanvasRenderingContext2D_SetStrokeStyle(JSContext *cx, JSObject *obj, jsid id, JSBool strict, jsval *vp)
{
return Canvas2D_SetStyleHelper(cx, obj, id, vp, &nsIDOMCanvasRenderingContext2D::SetStrokeStyle_multi);
}
static JSBool
nsIDOMCanvasRenderingContext2D_GetStrokeStyle(JSContext *cx, JSObject *obj, jsid id, jsval *vp)
{
return Canvas2D_GetStyleHelper(cx, obj, id, vp, &nsIDOMCanvasRenderingContext2D::GetStrokeStyle_multi);
}
static JSBool
nsIDOMCanvasRenderingContext2D_SetFillStyle(JSContext *cx, JSObject *obj, jsid id, JSBool strict, jsval *vp)
{
return Canvas2D_SetStyleHelper(cx, obj, id, vp, &nsIDOMCanvasRenderingContext2D::SetFillStyle_multi);
}
static JSBool
nsIDOMCanvasRenderingContext2D_GetFillStyle(JSContext *cx, JSObject *obj, jsid id, jsval *vp)
{
return Canvas2D_GetStyleHelper(cx, obj, id, vp, &nsIDOMCanvasRenderingContext2D::GetFillStyle_multi);
}
static bool
CreateImageData(JSContext* cx,
uint32 w,
uint32 h,
nsIDOMCanvasRenderingContext2D* self,
int32 x,
int32 y,
jsval* vp)
{
using mozilla::CheckedInt;
if (w == 0)
w = 1;
if (h == 0)
h = 1;
CheckedInt<uint32_t> len = CheckedInt<uint32_t>(w) * h * 4;
if (!len.valid()) {
return xpc_qsThrow(cx, NS_ERROR_DOM_INDEX_SIZE_ERR);
}
// Create the fast typed array; it's initialized to 0 by default.
JSObject* darray =
js_CreateTypedArray(cx, js::TypedArray::TYPE_UINT8_CLAMPED, len.value());
js::AutoObjectRooter rd(cx, darray);
if (!darray) {
return false;
}
if (self) {
JSObject *tdest = js::TypedArray::getTypedArray(darray);
// make the call
nsresult rv =
self->GetImageData_explicit(x, y, w, h,
static_cast<PRUint8*>(JS_GetTypedArrayData(tdest)),
JS_GetTypedArrayByteLength(tdest));
if (NS_FAILED(rv)) {
return xpc_qsThrowMethodFailed(cx, rv, vp);
}
}
// Do JS_NewObject after CreateTypedArray, so that gc will get
// triggered here if necessary
JSObject* result = JS_NewObject(cx, NULL, NULL, NULL);
js::AutoObjectRooter rr(cx, result);
if (!result) {
return false;
}
if (!JS_DefineProperty(cx, result, "width", INT_TO_JSVAL(w), NULL, NULL,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT) ||
!JS_DefineProperty(cx, result, "height", INT_TO_JSVAL(h), NULL, NULL,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT) ||
!JS_DefineProperty(cx, result, "data", OBJECT_TO_JSVAL(darray), NULL, NULL,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) {
return false;
}
*vp = OBJECT_TO_JSVAL(result);
return true;
}
static bool
GetImageDataDimensions(JSContext *cx, JSObject *dataObject, uint32_t *width, uint32_t *height)
{
jsval temp;
int32_t wi, hi;
// Need to check that dataObject is ImageData object. That's hard for the moment
// because they're just vanilla objects in our implementation.
// Let's guess, if the object has valid width and height then it's suitable
// for this operation.
if (!JS_GetProperty(cx, dataObject, "width", &temp) ||
!JS_ValueToECMAInt32(cx, temp, &wi))
return false;
if (!JS_GetProperty(cx, dataObject, "height", &temp) ||
!JS_ValueToECMAInt32(cx, temp, &hi))
return false;
if (wi <= 0 || hi <= 0)
return xpc_qsThrow(cx, NS_ERROR_DOM_INDEX_SIZE_ERR);
*width = uint32_t(wi);
*height = uint32_t(hi);
return true;
}
static JSBool
nsIDOMCanvasRenderingContext2D_CreateImageData(JSContext *cx, uintN argc, jsval *vp)
{
XPC_QS_ASSERT_CONTEXT_OK(cx);
/* Note: this doesn't need JS_THIS_OBJECT */
if (argc < 1)
return xpc_qsThrow(cx, NS_ERROR_XPC_NOT_ENOUGH_ARGS);
jsval *argv = JS_ARGV(cx, vp);
if (argc == 1) {
// The specification asks to throw NOT_SUPPORTED if first argument is NULL,
// An object is expected, so throw an exception for all primitives.
if (JSVAL_IS_PRIMITIVE(argv[0]))
return xpc_qsThrow(cx, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
JSObject *dataObject = JSVAL_TO_OBJECT(argv[0]);
uint32_t data_width, data_height;
if (!GetImageDataDimensions(cx, dataObject, &data_width, &data_height))
return false;
return CreateImageData(cx, data_width, data_height, NULL, 0, 0, vp);
}
jsdouble width, height;
if (!JS_ValueToNumber(cx, argv[0], &width) ||
!JS_ValueToNumber(cx, argv[1], &height))
return false;
if (!NS_finite(width) || !NS_finite(height))
return xpc_qsThrow(cx, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
if (!width || !height)
return xpc_qsThrow(cx, NS_ERROR_DOM_INDEX_SIZE_ERR);
int32 wi = JS_DoubleToInt32(width);
int32 hi = JS_DoubleToInt32(height);
uint32 w = NS_ABS(wi);
uint32 h = NS_ABS(hi);
return CreateImageData(cx, w, h, NULL, 0, 0, vp);
}
static JSBool
nsIDOMCanvasRenderingContext2D_GetImageData(JSContext *cx, uintN argc, jsval *vp)
{
XPC_QS_ASSERT_CONTEXT_OK(cx);
JSObject *obj = JS_THIS_OBJECT(cx, vp);
if (!obj)
return JS_FALSE;
nsIDOMCanvasRenderingContext2D *self;
xpc_qsSelfRef selfref;
js::AutoValueRooter tvr(cx);
if (!xpc_qsUnwrapThis(cx, obj, nsnull, &self, &selfref.ptr, tvr.jsval_addr(), nsnull))
return JS_FALSE;
if (argc < 4)
return xpc_qsThrow(cx, NS_ERROR_XPC_NOT_ENOUGH_ARGS);
jsval *argv = JS_ARGV(cx, vp);
jsdouble xd, yd, width, height;
if (!JS_ValueToNumber(cx, argv[0], &xd) ||
!JS_ValueToNumber(cx, argv[1], &yd) ||
!JS_ValueToNumber(cx, argv[2], &width) ||
!JS_ValueToNumber(cx, argv[3], &height))
return false;
if (!NS_finite(xd) || !NS_finite(yd) ||
!NS_finite(width) || !NS_finite(height))
return xpc_qsThrow(cx, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
if (!width || !height)
return xpc_qsThrow(cx, NS_ERROR_DOM_INDEX_SIZE_ERR);
int32 x = JS_DoubleToInt32(xd);
int32 y = JS_DoubleToInt32(yd);
int32 wi = JS_DoubleToInt32(width);
int32 hi = JS_DoubleToInt32(height);
// Handle negative width and height by flipping the rectangle over in the
// relevant direction.
uint32 w, h;
if (width < 0) {
w = -wi;
x -= w;
} else {
w = wi;
}
if (height < 0) {
h = -hi;
y -= h;
} else {
h = hi;
}
return CreateImageData(cx, w, h, self, x, y, vp);
}
static JSBool
nsIDOMCanvasRenderingContext2D_PutImageData(JSContext *cx, uintN argc, jsval *vp)
{
XPC_QS_ASSERT_CONTEXT_OK(cx);
JSObject *obj = JS_THIS_OBJECT(cx, vp);
if (!obj)
return JS_FALSE;
nsresult rv;
nsIDOMCanvasRenderingContext2D *self;
xpc_qsSelfRef selfref;
js::AutoValueRooter tvr(cx);
if (!xpc_qsUnwrapThis(cx, obj, nsnull, &self, &selfref.ptr, tvr.jsval_addr(), nsnull))
return JS_FALSE;
if (argc < 3)
return xpc_qsThrow(cx, NS_ERROR_XPC_NOT_ENOUGH_ARGS);
jsval *argv = JS_ARGV(cx, vp);
if (JSVAL_IS_PRIMITIVE(argv[0]))
return xpc_qsThrow(cx, NS_ERROR_DOM_TYPE_MISMATCH_ERR);
JSObject *dataObject = JSVAL_TO_OBJECT(argv[0]);
double xd, yd;
if (!JS_ValueToNumber(cx, argv[1], &xd) ||
!JS_ValueToNumber(cx, argv[2], &yd)) {
return false;
}
if (!NS_finite(xd) || !NS_finite(yd)) {
return xpc_qsThrow(cx, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
}
int32 x = JS_DoubleToInt32(xd);
int32 y = JS_DoubleToInt32(yd);
// Grab width, height, and the dense array from the dataObject.
js::AutoValueRooter tv(cx);
uint32_t w, h;
if (!GetImageDataDimensions(cx, dataObject, &w, &h))
return JS_FALSE;
// the optional dirty rect
bool hasDirtyRect = false;
int32 dirtyX = 0,
dirtyY = 0,
dirtyWidth = w,
dirtyHeight = h;
if (argc >= 7) {
double dx, dy, dw, dh;
if (!JS_ValueToNumber(cx, argv[3], &dx) ||
!JS_ValueToNumber(cx, argv[4], &dy) ||
!JS_ValueToNumber(cx, argv[5], &dw) ||
!JS_ValueToNumber(cx, argv[6], &dh)) {
return false;
}
if (!NS_finite(dx) || !NS_finite(dy) ||
!NS_finite(dw) || !NS_finite(dh)) {
return xpc_qsThrow(cx, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
}
dirtyX = JS_DoubleToInt32(dx);
dirtyY = JS_DoubleToInt32(dy);
dirtyWidth = JS_DoubleToInt32(dw);
dirtyHeight = JS_DoubleToInt32(dh);
hasDirtyRect = true;
}
if (!JS_GetProperty(cx, dataObject, "data", tv.jsval_addr()))
return JS_FALSE;
if (JSVAL_IS_PRIMITIVE(tv.jsval_value()))
return xpc_qsThrow(cx, NS_ERROR_DOM_TYPE_MISMATCH_ERR);
JSObject *darray = JSVAL_TO_OBJECT(tv.jsval_value());
js::AutoValueRooter tsrc_tvr(cx);
JSObject *tsrc = NULL;
if (js::GetObjectClass(darray) == &js::TypedArray::fastClasses[js::TypedArray::TYPE_UINT8] ||
js::GetObjectClass(darray) == &js::TypedArray::fastClasses[js::TypedArray::TYPE_UINT8_CLAMPED])
{
tsrc = js::TypedArray::getTypedArray(darray);
} else if (JS_IsArrayObject(cx, darray) || js_IsTypedArray(darray)) {
// ugh, this isn't a uint8 typed array, someone made their own object; convert it to a typed array
JSObject *nobj = js_CreateTypedArrayWithArray(cx, js::TypedArray::TYPE_UINT8, darray);
if (!nobj)
return JS_FALSE;
*tsrc_tvr.jsval_addr() = OBJECT_TO_JSVAL(nobj);
tsrc = js::TypedArray::getTypedArray(nobj);
} else {
// yeah, no.
return xpc_qsThrow(cx, NS_ERROR_DOM_TYPE_MISMATCH_ERR);
}
// make the call
rv = self->PutImageData_explicit(x, y, w, h, static_cast<PRUint8*>(JS_GetTypedArrayData(tsrc)), JS_GetTypedArrayByteLength(tsrc), hasDirtyRect, dirtyX, dirtyY, dirtyWidth, dirtyHeight);
if (NS_FAILED(rv))
return xpc_qsThrowMethodFailed(cx, rv, vp);
*vp = JSVAL_VOID;
return JS_TRUE;
}
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