diff options
author | mike@reedtribe.org <mike@reedtribe.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-13 00:01:39 +0000 |
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committer | mike@reedtribe.org <mike@reedtribe.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-13 00:01:39 +0000 |
commit | 56d5bfa90eb8fdfdef65bc91276480036bc545b6 (patch) | |
tree | ff1ea6959cf15014c372cd7266e83eed66ed4d74 /src/core | |
parent | 65be881c83b6e07110855d779ac828e219d406f9 (diff) |
privatize SkBuffer.h
git-svn-id: http://skia.googlecode.com/svn/trunk@5050 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'src/core')
-rw-r--r-- | src/core/SkBuffer.h | 139 | ||||
-rw-r--r-- | src/core/SkMaskFilter.cpp | 1 | ||||
-rw-r--r-- | src/core/SkPathEffect.cpp | 1 |
3 files changed, 139 insertions, 2 deletions
diff --git a/src/core/SkBuffer.h b/src/core/SkBuffer.h new file mode 100644 index 0000000000..7a63d3aa18 --- /dev/null +++ b/src/core/SkBuffer.h @@ -0,0 +1,139 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkBuffer_DEFINED +#define SkBuffer_DEFINED + +#include "SkScalar.h" + +/** \class SkRBuffer + + Light weight class for reading data from a memory block. + The RBuffer is given the buffer to read from, with either a specified size + or no size (in which case no range checking is performed). It is iillegal + to attempt to read a value from an empty RBuffer (data == null). +*/ +class SkRBuffer : SkNoncopyable { +public: + SkRBuffer() : fData(0), fPos(0), fStop(0) {} + /** Initialize RBuffer with a data pointer, but no specified length. + This signals the RBuffer to not perform range checks during reading. + */ + SkRBuffer(const void* data) { + fData = (const char*)data; + fPos = (const char*)data; + fStop = 0; // no bounds checking + } + /** Initialize RBuffer with a data point and length. + */ + SkRBuffer(const void* data, size_t size) { + SkASSERT(data != 0 || size == 0); + fData = (const char*)data; + fPos = (const char*)data; + fStop = (const char*)data + size; + } + + /** Return the number of bytes that have been read from the beginning + of the data pointer. + */ + size_t pos() const { return fPos - fData; } + /** Return the total size of the data pointer. Only defined if the length was + specified in the constructor or in a call to reset(). + */ + size_t size() const { return fStop - fData; } + /** Return true if the buffer has read to the end of the data pointer. + Only defined if the length was specified in the constructor or in a call + to reset(). Always returns true if the length was not specified. + */ + bool eof() const { return fPos >= fStop; } + + /** Read the specified number of bytes from the data pointer. If buffer is not + null, copy those bytes into buffer. + */ + void read(void* buffer, size_t size) { + if (size) { + this->readNoSizeCheck(buffer, size); + } + } + + const void* skip(size_t size); // return start of skipped data + size_t skipToAlign4(); + + void* readPtr() { void* ptr; read(&ptr, sizeof(ptr)); return ptr; } + SkScalar readScalar() { SkScalar x; read(&x, 4); return x; } + uint32_t readU32() { uint32_t x; read(&x, 4); return x; } + int32_t readS32() { int32_t x; read(&x, 4); return x; } + uint16_t readU16() { uint16_t x; read(&x, 2); return x; } + int16_t readS16() { int16_t x; read(&x, 2); return x; } + uint8_t readU8() { uint8_t x; read(&x, 1); return x; } + bool readBool() { return this->readU8() != 0; } + +protected: + void readNoSizeCheck(void* buffer, size_t size); + + const char* fData; + const char* fPos; + const char* fStop; +}; + +/** \class SkWBuffer + + Light weight class for writing data to a memory block. + The WBuffer is given the buffer to write into, with either a specified size + or no size, in which case no range checking is performed. An empty WBuffer + is legal, in which case no data is ever written, but the relative pos() + is updated. +*/ +class SkWBuffer : SkNoncopyable { +public: + SkWBuffer() : fData(0), fPos(0), fStop(0) {} + SkWBuffer(void* data) { reset(data); } + SkWBuffer(void* data, size_t size) { reset(data, size); } + + void reset(void* data) { + fData = (char*)data; + fPos = (char*)data; + fStop = 0; // no bounds checking + } + + void reset(void* data, size_t size) { + SkASSERT(data != 0 || size == 0); + fData = (char*)data; + fPos = (char*)data; + fStop = (char*)data + size; + } + + size_t pos() const { return fPos - fData; } + void* skip(size_t size); // return start of skipped data + + void write(const void* buffer, size_t size) { + if (size) { + this->writeNoSizeCheck(buffer, size); + } + } + + size_t padToAlign4(); + + void writePtr(const void* x) { this->writeNoSizeCheck(&x, sizeof(x)); } + void writeScalar(SkScalar x) { this->writeNoSizeCheck(&x, 4); } + void write32(int32_t x) { this->writeNoSizeCheck(&x, 4); } + void write16(int16_t x) { this->writeNoSizeCheck(&x, 2); } + void write8(int8_t x) { this->writeNoSizeCheck(&x, 1); } + void writeBool(bool x) { this->write8(x); } + +protected: + void writeNoSizeCheck(const void* buffer, size_t size); + + char* fData; + char* fPos; + char* fStop; +}; + +#endif + diff --git a/src/core/SkMaskFilter.cpp b/src/core/SkMaskFilter.cpp index 96e14a1130..f27ebd1e14 100644 --- a/src/core/SkMaskFilter.cpp +++ b/src/core/SkMaskFilter.cpp @@ -10,7 +10,6 @@ #include "SkMaskFilter.h" #include "SkBlitter.h" #include "SkBounder.h" -#include "SkBuffer.h" #include "SkDraw.h" #include "SkRasterClip.h" diff --git a/src/core/SkPathEffect.cpp b/src/core/SkPathEffect.cpp index 6abce74863..84b590d4f8 100644 --- a/src/core/SkPathEffect.cpp +++ b/src/core/SkPathEffect.cpp @@ -9,7 +9,6 @@ #include "SkPathEffect.h" #include "SkPath.h" -#include "SkBuffer.h" #include "SkFlattenableBuffers.h" #include "SkPaintDefaults.h" |