/* -*- Mode: c++; c-basic-offset: 4; tab-width: 40; indent-tabs-mode: nil -*- */ /* vim: set ts=40 sw=4 et tw=78: */ /* ***** 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 Mozilla WebGL impl * * The Initial Developer of the Original Code is * Mozilla Corp * Portions created by the Initial Developer are Copyright (C) 2009 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Vladimir Vukicevic * * 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 ***** */ #ifndef jstypedarray_h #define jstypedarray_h #include "jsapi.h" typedef struct JSProperty JSProperty; namespace js { /* * ArrayBuffer * * This class holds the underlying raw buffer that the TypedArray * subclasses access. It can be created explicitly and passed to a * TypedArray subclass, or can be created implicitly by constructing a * TypedArray with a size. */ struct JS_FRIEND_API(ArrayBuffer) { static JSClass jsclass; static JSPropertySpec jsprops[]; static JSBool prop_getByteLength(JSContext *cx, JSObject *obj, jsval id, jsval *vp); static void class_finalize(JSContext *cx, JSObject *obj); static JSBool class_constructor(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval); static ArrayBuffer *fromJSObject(JSObject *obj); ArrayBuffer() : data(0), byteLength() { } ~ArrayBuffer(); bool allocateStorage(JSContext *cx, uint32 bytes); void freeStorage(JSContext *cx); void *offsetData(uint32 offs) { return (void*) (((intptr_t)data) + offs); } void *data; uint32 byteLength; }; /* * TypedArray * * The non-templated base class for the specific typed implementations. * This class holds all the member variables that are used by * the subclasses. */ struct JS_FRIEND_API(TypedArray) { enum { TYPE_INT8 = 0, TYPE_UINT8, TYPE_INT16, TYPE_UINT16, TYPE_INT32, TYPE_UINT32, TYPE_FLOAT32, TYPE_MAX }; // and MUST NOT be used to construct new objects. static JSClass fastClasses[TYPE_MAX]; // These are the slow/original classes, used // fo constructing new objects static JSClass slowClasses[TYPE_MAX]; static JSPropertySpec jsprops[]; static TypedArray *fromJSObject(JSObject *obj); static JSBool prop_getBuffer(JSContext *cx, JSObject *obj, jsval id, jsval *vp); static JSBool prop_getByteOffset(JSContext *cx, JSObject *obj, jsval id, jsval *vp); static JSBool prop_getByteLength(JSContext *cx, JSObject *obj, jsval id, jsval *vp); static JSBool prop_getLength(JSContext *cx, JSObject *obj, jsval id, jsval *vp); static JSBool obj_lookupProperty(JSContext *cx, JSObject *obj, jsid id, JSObject **objp, JSProperty **propp); static void obj_dropProperty(JSContext *cx, JSObject *obj, JSProperty *prop); static void obj_trace(JSTracer *trc, JSObject *obj); static JSBool obj_getAttributes(JSContext *cx, JSObject *obj, jsid id, JSProperty *prop, uintN *attrsp); static JSBool obj_setAttributes(JSContext *cx, JSObject *obj, jsid id, JSProperty *prop, uintN *attrsp); static int32 lengthOffset() { return offsetof(TypedArray, length); } static int32 dataOffset() { return offsetof(TypedArray, data); } static int32 typeOffset() { return offsetof(TypedArray, type); } public: TypedArray() : buffer(0) { } bool isArrayIndex(JSContext *cx, jsid id, jsuint *ip = NULL); bool valid() { return buffer != 0; } ArrayBuffer *buffer; JSObject *bufferJS; uint32 byteOffset; uint32 byteLength; uint32 length; uint32 type; void *data; }; } // namespace js /* Friend API methods */ JS_BEGIN_EXTERN_C JS_FRIEND_API(JSObject *) js_InitTypedArrayClasses(JSContext *cx, JSObject *obj); JS_FRIEND_API(JSBool) js_IsTypedArray(JSObject *obj); JS_FRIEND_API(JSBool) js_IsArrayBuffer(JSObject *obj); JS_FRIEND_API(JSObject *) js_CreateArrayBuffer(JSContext *cx, jsuint nbytes); /* * Create a new typed array of type atype (one of the TypedArray * enumerant values above), with nelements elements. */ JS_FRIEND_API(JSObject *) js_CreateTypedArray(JSContext *cx, jsint atype, jsuint nelements); /* * Create a new typed array of type atype (one of the TypedArray * enumerant values above), and copy in values from the given JSObject, * which must either be a typed array or an array-like object. */ JS_FRIEND_API(JSObject *) js_CreateTypedArrayWithArray(JSContext *cx, jsint atype, JSObject *arrayArg); /* * Create a new typed array of type atype (one of the TypedArray * enumerant values above), using a given ArrayBuffer for storage. * The byteoffset and length values are optional; if -1 is passed, an * offset of 0 and enough elements to use up the remainder of the byte * array are used as the default values. */ JS_FRIEND_API(JSObject *) js_CreateTypedArrayWithBuffer(JSContext *cx, jsint atype, JSObject *bufArg, jsint byteoffset, jsint length); JS_END_EXTERN_C #endif /* jstypedarray_h */