5b3d5349be
git-svn-id: http://skia.googlecode.com/svn/trunk@1188 2bbb7eff-a529-9590-31e7-b0007b416f81
121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef SkWriter32_DEFINED
|
|
#define SkWriter32_DEFINED
|
|
|
|
#include "SkTypes.h"
|
|
|
|
#include "SkScalar.h"
|
|
#include "SkPoint.h"
|
|
#include "SkRect.h"
|
|
|
|
class SkStream;
|
|
class SkWStream;
|
|
|
|
class SkWriter32 : SkNoncopyable {
|
|
public:
|
|
SkWriter32(size_t minSize) {
|
|
fMinSize = minSize;
|
|
fSize = 0;
|
|
fHead = fTail = NULL;
|
|
}
|
|
~SkWriter32();
|
|
|
|
bool writeBool(bool value) {
|
|
this->writeInt(value);
|
|
return value;
|
|
}
|
|
|
|
void writeInt(int32_t value) {
|
|
*(int32_t*)this->reserve(sizeof(value)) = value;
|
|
}
|
|
|
|
void write8(int32_t value) {
|
|
*(int32_t*)this->reserve(sizeof(value)) = value & 0xFF;
|
|
}
|
|
|
|
void write16(int32_t value) {
|
|
*(int32_t*)this->reserve(sizeof(value)) = value & 0xFFFF;
|
|
}
|
|
|
|
void write32(int32_t value) {
|
|
*(int32_t*)this->reserve(sizeof(value)) = value;
|
|
}
|
|
|
|
void writeScalar(SkScalar value) {
|
|
*(SkScalar*)this->reserve(sizeof(value)) = value;
|
|
}
|
|
|
|
void writePoint(const SkPoint& pt) {
|
|
*(SkPoint*)this->reserve(sizeof(pt)) = pt;
|
|
}
|
|
|
|
void writeRect(const SkRect& rect) {
|
|
*(SkRect*)this->reserve(sizeof(rect)) = rect;
|
|
}
|
|
|
|
// write count bytes (must be a multiple of 4)
|
|
void writeMul4(const void* values, size_t size) {
|
|
this->write(values, size);
|
|
}
|
|
|
|
/**
|
|
* Write size bytes from values. size must be a multiple of 4, though
|
|
* values need not be 4-byte aligned.
|
|
*/
|
|
void write(const void* values, size_t size) {
|
|
SkASSERT(SkAlign4(size) == size);
|
|
// if we could query how much is avail in the current block, we might
|
|
// copy that much, and then alloc the rest. That would reduce the waste
|
|
// in the current block
|
|
memcpy(this->reserve(size), values, size);
|
|
}
|
|
|
|
void writePad(const void* src, size_t size);
|
|
|
|
// return the current offset (will always be a multiple of 4)
|
|
uint32_t size() const { return fSize; }
|
|
void reset();
|
|
uint32_t* reserve(size_t size); // size MUST be multiple of 4
|
|
|
|
// return the address of the 4byte int at the specified offset (which must
|
|
// be a multiple of 4. This does not allocate any new space, so the returned
|
|
// address is only valid for 1 int.
|
|
uint32_t* peek32(size_t offset);
|
|
|
|
// copy into a single buffer (allocated by caller). Must be at least size()
|
|
void flatten(void* dst) const;
|
|
|
|
// read from the stream, and write up to length bytes. Return the actual
|
|
// number of bytes written.
|
|
size_t readFromStream(SkStream*, size_t length);
|
|
|
|
bool writeToStream(SkWStream*);
|
|
|
|
private:
|
|
size_t fMinSize;
|
|
uint32_t fSize;
|
|
|
|
struct Block;
|
|
Block* fHead;
|
|
Block* fTail;
|
|
|
|
Block* newBlock(size_t bytes);
|
|
};
|
|
|
|
#endif
|