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//
// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// debug.cpp: Debugging utilities.
#include "common/debug.h"
#include "common/platform.h"
#include <stdarg.h>
#include <vector>
#include <fstream>
#include <cstdio>
namespace gl
{
#if defined(ANGLE_ENABLE_PERF)
typedef void (WINAPI *PerfOutputFunction)(D3DCOLOR, LPCWSTR);
#else
typedef void (*PerfOutputFunction)(unsigned int, const wchar_t*);
#endif
static void output(bool traceFileDebugOnly, PerfOutputFunction perfFunc, const char *format, va_list vararg)
{
#if defined(ANGLE_ENABLE_PERF) || defined(ANGLE_ENABLE_TRACE)
static std::vector<char> asciiMessageBuffer(512);
// Attempt to just print to the current buffer
int len = vsnprintf(&asciiMessageBuffer[0], asciiMessageBuffer.size(), format, vararg);
if (len < 0 || static_cast<size_t>(len) >= asciiMessageBuffer.size())
{
// Buffer was not large enough, calculate the required size and resize the buffer
len = vsnprintf(NULL, 0, format, vararg);
asciiMessageBuffer.resize(len + 1);
// Print again
vsnprintf(&asciiMessageBuffer[0], asciiMessageBuffer.size(), format, vararg);
}
// NULL terminate the buffer to be safe
asciiMessageBuffer[len] = '\0';
#endif
#if defined(ANGLE_ENABLE_PERF)
if (perfActive())
{
// The perf function only accepts wide strings, widen the ascii message
static std::wstring wideMessage;
if (wideMessage.capacity() < asciiMessageBuffer.size())
{
wideMessage.reserve(asciiMessageBuffer.size());
}
wideMessage.assign(asciiMessageBuffer.begin(), asciiMessageBuffer.begin() + len);
perfFunc(0, wideMessage.c_str());
}
#endif // ANGLE_ENABLE_PERF
#if defined(ANGLE_ENABLE_TRACE)
#if defined(NDEBUG)
if (traceFileDebugOnly)
{
return;
}
#endif // NDEBUG
static std::ofstream file(TRACE_OUTPUT_FILE, std::ofstream::app);
if (file)
{
file.write(&asciiMessageBuffer[0], len);
file.flush();
}
#endif // ANGLE_ENABLE_TRACE
}
void trace(bool traceFileDebugOnly, const char *format, ...)
{
va_list vararg;
va_start(vararg, format);
#if defined(ANGLE_ENABLE_PERF)
output(traceFileDebugOnly, D3DPERF_SetMarker, format, vararg);
#else
output(traceFileDebugOnly, NULL, format, vararg);
#endif
va_end(vararg);
}
bool perfActive()
{
#if defined(ANGLE_ENABLE_PERF)
static bool active = D3DPERF_GetStatus() != 0;
return active;
#else
return false;
#endif
}
ScopedPerfEventHelper::ScopedPerfEventHelper(const char* format, ...)
{
#if defined(ANGLE_ENABLE_PERF)
#if !defined(ANGLE_ENABLE_TRACE)
if (!perfActive())
{
return;
}
#endif // !ANGLE_ENABLE_TRACE
va_list vararg;
va_start(vararg, format);
output(true, reinterpret_cast<PerfOutputFunction>(D3DPERF_BeginEvent), format, vararg);
va_end(vararg);
#endif // ANGLE_ENABLE_PERF
}
ScopedPerfEventHelper::~ScopedPerfEventHelper()
{
#if defined(ANGLE_ENABLE_PERF)
if (perfActive())
{
D3DPERF_EndEvent();
}
#endif
}
}
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