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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrAuditTrail_DEFINED
#define GrAuditTrail_DEFINED
#include "GrConfig.h"
#include "SkRect.h"
#include "SkString.h"
#include "SkTArray.h"
/*
* GrAuditTrail collects a list of draw ops, detailed information about those ops, and can dump them
* to json.
*
* Capturing this information is expensive and consumes a lot of memory, therefore it is important
* to enable auditing only when required and disable it promptly. The AutoEnable class helps to
* ensure that the audit trail is disabled in a timely fashion. Once the information has been dealt
* with, be sure to call reset(), or the log will simply keep growing.
*/
class GrAuditTrail {
public:
GrAuditTrail()
: fEnabled(false)
, fUniqueID(0) {}
class AutoFrame {
public:
AutoFrame(GrAuditTrail* auditTrail, const char* name)
: fAuditTrail(auditTrail) {
if (fAuditTrail->fEnabled) {
fAuditTrail->pushFrame(name);
}
}
~AutoFrame() {
if (fAuditTrail->fEnabled) {
fAuditTrail->popFrame();
}
}
private:
GrAuditTrail* fAuditTrail;
};
class AutoEnable {
public:
AutoEnable(GrAuditTrail* auditTrail)
: fAuditTrail(auditTrail) {
SkASSERT(!fAuditTrail->isEnabled());
fAuditTrail->setEnabled(true);
}
~AutoEnable() {
SkASSERT(fAuditTrail->isEnabled());
fAuditTrail->setEnabled(false);
}
private:
GrAuditTrail* fAuditTrail;
};
void pushFrame(const char* name) {
SkASSERT(fEnabled);
Frame* frame = new Frame;
if (fStack.empty()) {
fFrames.emplace_back(frame);
} else {
fStack.back()->fChildren.emplace_back(frame);
}
frame->fUniqueID = fUniqueID++;
frame->fName = name;
fStack.push_back(frame);
}
void popFrame() {
SkASSERT(fEnabled);
fStack.pop_back();
}
void addBatch(const char* name, const SkRect& bounds) {
SkASSERT(fEnabled && !fStack.empty());
Batch* batch = new Batch;
fStack.back()->fChildren.emplace_back(batch);
batch->fName = name;
batch->fBounds = bounds;
}
SkString toJson(bool prettyPrint = false) const;
bool isEnabled() { return fEnabled; }
void setEnabled(bool enabled) { fEnabled = enabled; }
void reset() { SkASSERT(fEnabled && fStack.empty()); fFrames.reset(); }
private:
// TODO if performance becomes an issue, we can move to using SkVarAlloc
struct Event {
virtual ~Event() {}
virtual SkString toJson() const=0;
const char* fName;
uint64_t fUniqueID;
};
typedef SkTArray<SkAutoTDelete<Event>, true> FrameArray;
struct Frame : public Event {
SkString toJson() const override;
FrameArray fChildren;
};
struct Batch : public Event {
SkString toJson() const override;
SkRect fBounds;
};
static void JsonifyTArray(SkString* json, const char* name, const FrameArray& array,
bool addComma);
bool fEnabled;
FrameArray fFrames;
SkTArray<Frame*> fStack;
uint64_t fUniqueID;
};
#define GR_AUDIT_TRAIL_INVOKE_GUARD(audit_trail, invoke, ...) \
if (audit_trail->isEnabled()) { \
audit_trail->invoke(__VA_ARGS__); \
}
#define GR_AUDIT_TRAIL_AUTO_FRAME(audit_trail, framename) \
GrAuditTrail::AutoFrame SK_MACRO_APPEND_LINE(auto_frame)(audit_trail, framename);
#define GR_AUDIT_TRAIL_RESET(audit_trail) \
GR_AUDIT_TRAIL_INVOKE_GUARD(audit_trail, reset);
#define GR_AUDIT_TRAIL_ADDBATCH(audit_trail, batchname, bounds) \
GR_AUDIT_TRAIL_INVOKE_GUARD(audit_trail, addBatch, batchname, bounds);
#endif
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