gecko-dev/dom/canvas/WebGLActiveInfo.h

93 строки
2.8 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_ACTIVE_INFO_H_
#define WEBGL_ACTIVE_INFO_H_
#include "GLDefs.h"
#include "mozilla/Attributes.h"
#include "nsCycleCollectionParticipant.h" // NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS
#include "nsISupportsImpl.h" // NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING
#include "nsString.h"
#include "nsWrapperCache.h"
namespace mozilla {
class WebGLContext;
class WebGLActiveInfo final : public nsWrapperCache {
public:
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLActiveInfo)
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLActiveInfo)
virtual JSObject* WrapObject(JSContext* js,
JS::Handle<JSObject*> givenProto) override;
WebGLContext* GetParentObject() const { return mWebGL; }
WebGLContext* const mWebGL;
// ActiveInfo state:
const uint32_t mElemCount; // `size`
const GLenum mElemType; // `type`
const nsCString
mBaseUserName; // `name`, but ASCII, and without any final "[0]".
// Not actually part of ActiveInfo:
const bool mIsArray;
const uint8_t mElemSize;
const nsCString mBaseMappedName; // Without any final "[0]".
const webgl::AttribBaseType mBaseType = webgl::AttribBaseType::Float;
bool IsSampler() const;
WebGLActiveInfo(WebGLContext* webgl, GLint elemCount, GLenum elemType,
bool isArray, const nsACString& baseUserName,
const nsACString& baseMappedName);
/* GLES 2.0.25, p33:
* This command will return as much information about active
* attributes as possible. If no information is available, length will
* be set to zero and name will be an empty string. This situation
* could arise if GetActiveAttrib is issued after a failed link.
*
* It's the same for GetActiveUniform.
*/
static WebGLActiveInfo* CreateInvalid(WebGLContext* webgl) {
return new WebGLActiveInfo(webgl);
}
// WebIDL attributes
GLint Size() const { return mElemCount; }
GLenum Type() const { return mElemType; }
void GetName(nsString& retval) const {
CopyASCIItoUTF16(mBaseUserName, retval);
if (mIsArray) retval.AppendLiteral("[0]");
}
private:
explicit WebGLActiveInfo(WebGLContext* webgl)
: mWebGL(webgl),
mElemCount(0),
mElemType(0),
mBaseUserName(""),
mIsArray(false),
mElemSize(0),
mBaseMappedName("") {}
// Private destructor, to discourage deletion outside of Release():
~WebGLActiveInfo() {}
};
//////////
bool IsElemTypeSampler(GLenum elemType);
} // namespace mozilla
#endif // WEBGL_ACTIVE_INFO_H_