/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef WEBGL_CONTEXT_UTILS_H_ #define WEBGL_CONTEXT_UTILS_H_ #include "WebGLContext.h" #include "mozilla/Assertions.h" #include "mozilla/dom/BindingUtils.h" #include "WebGLStrongTypes.h" namespace mozilla { // For use with the different texture calls, i.e. // TexImage2D, CopyTex[Sub]Image2D, ... // that take a "target" parameter. This parameter is not always the same as // the texture binding location, like GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP. // For example, cube maps would pass GL_TEXTURE_CUBE_MAP_[POS|NEG]_[X|Y|Z] // instead of just GL_TEXTURE_CUBE_MAP. // // This function converts the texture image target to the texture target a.k.a. // binding location. The returned binding location can be used to check that // the currently bound texture is appropriate for this texImageTarget. // // Returns GL_NONE if passed an invalid texture image target TexTarget TexImageTargetToTexTarget(TexImageTarget texImageTarget); // Helper function to create a JS::Value from a C string JS::Value StringValue(JSContext* cx, const char* str, ErrorResult& rv); struct GLComponents { unsigned char mComponents; enum Components { Red = (1 << 0), Green = (1 << 1), Blue = (1 << 2), Alpha = (1 << 3), Stencil = (1 << 4), Depth = (1 << 5), }; GLComponents() : mComponents(0) {} explicit GLComponents(TexInternalFormat format); // Returns true iff other has all (or more) of // the components present in this GLComponents bool IsSubsetOf(const GLComponents& other) const; }; template <typename WebGLObjectType> JS::Value WebGLContext::WebGLObjectAsJSValue(JSContext* cx, const WebGLObjectType* object, ErrorResult& rv) const { if (!object) return JS::NullValue(); MOZ_ASSERT(this == object->mContext); JS::Rooted<JS::Value> v(cx); JS::Rooted<JSObject*> wrapper(cx, GetWrapper()); JSAutoCompartment ac(cx, wrapper); if (!dom::GetOrCreateDOMReflector(cx, const_cast<WebGLObjectType*>(object), &v)) { rv.Throw(NS_ERROR_FAILURE); return JS::NullValue(); } return v; } template <typename WebGLObjectType> JSObject* WebGLContext::WebGLObjectAsJSObject(JSContext* cx, const WebGLObjectType* object, ErrorResult& rv) const { JS::Value v = WebGLObjectAsJSValue(cx, object, rv); if (v.isNull()) return nullptr; return &v.toObject(); } /** * Return the displayable name for the texture function that is the * source for validation. */ const char* InfoFrom(WebGLTexImageFunc func, WebGLTexDimensions dims); JS::Value StringValue(JSContext* cx, const nsAString& str, ErrorResult& er); } // namespace mozilla #endif // WEBGL_CONTEXT_UTILS_H_