72c9672ce2
Use an SkGPipe to play back drawing into tiles. This will help us to debug differences in drawing while tiled. Pass --tiledPipe to gm to use the tiled pipe. Review URL: https://codereview.appspot.com/6295050 git-svn-id: http://skia.googlecode.com/svn/trunk@4199 2bbb7eff-a529-9590-31e7-b0007b416f81
98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkGPipe_DEFINED
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#define SkGPipe_DEFINED
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#include "SkWriter32.h"
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#include "SkFlattenable.h"
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class SkCanvas;
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// XLib.h might have defined Status already (ugh)
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#ifdef Status
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#undef Status
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#endif
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class SkGPipeReader {
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public:
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SkGPipeReader();
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SkGPipeReader(SkCanvas* target);
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~SkGPipeReader();
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enum Status {
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kDone_Status, //!< no more data expected from reader
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kEOF_Status, //!< need more data from reader
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kError_Status, //!< encountered error
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kReadAtom_Status//!< finished reading an atom
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};
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void setCanvas(SkCanvas*);
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// data must be 4-byte aligned
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// length must be a multiple of 4
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Status playback(const void* data, size_t length, size_t* bytesRead = NULL,
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bool readAtom = false);
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private:
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SkCanvas* fCanvas;
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class SkGPipeState* fState;
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};
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///////////////////////////////////////////////////////////////////////////////
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class SkGPipeController {
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public:
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/**
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* Called periodically by the writer, to get a working buffer of RAM to
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* write into. The actual size of the block is also returned, and must be
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* actual >= minRequest. If NULL is returned, then actual is ignored and
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* writing will stop.
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*
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* The returned block must be 4-byte aligned, and actual must be a
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* multiple of 4.
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* minRequest will always be a multiple of 4.
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*/
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virtual void* requestBlock(size_t minRequest, size_t* actual) = 0;
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/**
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* This is called each time some atomic portion of the data has been
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* written to the block (most recently returned by requestBlock()).
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* If bytes == 0, then the writer has finished.
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*
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* bytes will always be a multiple of 4.
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*/
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virtual void notifyWritten(size_t bytes) = 0;
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};
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class SkGPipeWriter {
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public:
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SkGPipeWriter();
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~SkGPipeWriter();
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bool isRecording() const { return NULL != fCanvas; }
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enum Flags {
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kCrossProcess_Flag = 1 << 0,
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};
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SkCanvas* startRecording(SkGPipeController*, uint32_t flags = 0);
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// called in destructor, but can be called sooner once you know there
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// should be no more drawing calls made into the recording canvas.
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void endRecording();
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private:
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class SkGPipeCanvas* fCanvas;
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SkGPipeController* fController;
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SkFactorySet fFactorySet;
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SkWriter32 fWriter;
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};
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#endif
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