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/*
* Copyright 2021 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKVMDEBUGTRACE
#define SKVMDEBUGTRACE
#include "include/sksl/SkSLDebugTrace.h"
#include "include/core/SkPoint.h"
#include "src/sksl/tracing/SkSLDebugInfo.h"
#include "src/sksl/tracing/SkSLTraceHook.h"
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
class SkStream;
class SkWStream;
namespace SkSL {
class SkVMDebugTrace : public DebugTrace {
public:
/**
* Sets the device-coordinate pixel to trace. If it's not set, the point at (0, 0) will be used.
*/
void setTraceCoord(const SkIPoint& coord);
/** Attaches the SkSL source to be debugged. */
void setSource(std::string source);
/** Serializes a debug trace to JSON which can be parsed by our debugger. */
bool readTrace(SkStream* r);
void writeTrace(SkWStream* w) const override;
/** Generates a human-readable dump of the debug trace. */
void dump(SkWStream* o) const override;
/** Returns a slot's component as a variable-name suffix, e.g. ".x" or "[2][2]". */
std::string getSlotComponentSuffix(int slotIndex) const;
/** Bit-casts a slot's value, then converts to text, e.g. "3.14" or "true" or "12345". */
std::string getSlotValue(int slotIndex, int32_t value) const;
/** Bit-casts a value for a given slot into a double, honoring the slot's NumberKind. */
double interpretValueBits(int slotIndex, int32_t valueBits) const;
/** Converts a numeric value into text, based on the slot's NumberKind. */
std::string slotValueToString(int slotIndex, double value) const;
/** The device-coordinate pixel to trace (controlled by setTraceCoord) */
SkIPoint fTraceCoord = {};
/** A 1:1 mapping of slot numbers to debug information. */
std::vector<SlotDebugInfo> fSlotInfo;
std::vector<FunctionDebugInfo> fFuncInfo;
/** The SkSL debug trace. */
std::vector<TraceInfo> fTraceInfo;
/** The SkSL code, split line-by-line. */
std::vector<std::string> fSource;
/**
* A trace hook which populates fTraceInfo during SkVM program evaluation. This will be created
* automatically by the SkSLVMCodeGenerator.
*/
std::unique_ptr<SkSL::TraceHook> fTraceHook;
};
} // namespace SkSL
#endif
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