gecko-dev/dom/canvas/WebGLBuffer.h

138 строки
3.8 KiB
C++

/* -*- Mode: C++; tab-width: 4; 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_BUFFER_H_
#define WEBGL_BUFFER_H_
#include <map>
#include "CacheInvalidator.h"
#include "GLDefs.h"
#include "mozilla/LinkedList.h"
#include "nsWrapperCache.h"
#include "WebGLObjectModel.h"
#include "WebGLTypes.h"
namespace mozilla {
class WebGLBuffer final
: public nsWrapperCache
, public WebGLRefCountedObject<WebGLBuffer>
, public LinkedListElement<WebGLBuffer>
{
friend class WebGLContext;
friend class WebGL2Context;
friend class WebGLTexture;
public:
enum class Kind {
Undefined,
ElementArray,
OtherData
};
WebGLBuffer(WebGLContext* webgl, GLuint buf);
void SetContentAfterBind(GLenum target);
Kind Content() const { return mContent; }
void Delete();
size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
GLenum Usage() const { return mUsage; }
size_t ByteLength() const { return mByteLength; }
Maybe<uint32_t> GetIndexedFetchMaxVert(GLenum type, uint64_t byteOffset,
uint32_t indexCount) const;
bool ValidateRange(size_t byteOffset, size_t byteLen) const;
WebGLContext* GetParentObject() const {
return mContext;
}
virtual JSObject* WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) override;
bool ValidateCanBindToTarget(GLenum target);
void BufferData(GLenum target, size_t size, const void* data, GLenum usage);
void BufferSubData(GLenum target, size_t dstByteOffset, size_t dataLen,
const void* data) const;
////
static void AddBindCount(GLenum target, WebGLBuffer* buffer, int8_t addVal) {
if (!buffer)
return;
if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER) {
MOZ_ASSERT_IF(addVal < 0, buffer->mTFBindCount >= size_t(-addVal));
buffer->mTFBindCount += addVal;
buffer->mFetchInvalidator.InvalidateCaches();
} else {
MOZ_ASSERT_IF(addVal < 0, buffer->mNonTFBindCount >= size_t(-addVal));
buffer->mNonTFBindCount += addVal;
}
}
static void SetSlot(GLenum target, WebGLBuffer* newBuffer,
WebGLRefPtr<WebGLBuffer>* const out_slot)
{
WebGLBuffer* const oldBuffer = *out_slot;
AddBindCount(target, oldBuffer, -1);
AddBindCount(target, newBuffer, +1);
*out_slot = newBuffer;
}
bool IsBoundForTF() const { return bool(mTFBindCount); }
bool IsBoundForNonTF() const { return bool(mNonTFBindCount); }
////
const GLenum mGLName;
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLBuffer)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLBuffer)
protected:
~WebGLBuffer();
void InvalidateCacheRange(uint64_t byteOffset, uint64_t byteLength) const;
Kind mContent;
GLenum mUsage;
size_t mByteLength;
size_t mTFBindCount;
size_t mNonTFBindCount;
mutable uint64_t mLastUpdateFenceId = 0;
struct IndexRange final {
GLenum type;
uint64_t byteOffset;
uint32_t indexCount;
bool operator<(const IndexRange& x) const {
if (type != x.type)
return type < x.type;
if (byteOffset != x.byteOffset)
return byteOffset < x.byteOffset;
return indexCount < x.indexCount;
}
};
UniqueBuffer mIndexCache;
mutable std::map<IndexRange, Maybe<uint32_t>> mIndexRanges;
public:
CacheInvalidator mFetchInvalidator;
void ResetLastUpdateFenceId() const;
};
} // namespace mozilla
#endif // WEBGL_BUFFER_H_