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//
// Copyright 2019 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.
//
// OverlayWidgets.h:
// Defines the Overlay* widget classes and corresponding enums.
//
#ifndef LIBANGLE_OVERLAYWIDGETS_H_
#define LIBANGLE_OVERLAYWIDGETS_H_
#include "common/angleutils.h"
#include "libANGLE/Overlay_autogen.h"
namespace gl
{
class Overlay;
class OverlayState;
namespace overlay_impl
{
class AppendWidgetDataHelper;
} // namespace overlay_impl
enum class WidgetType
{
// Text types:
// A total count of some event.
Count,
// A single line of ASCII text. Retains content until changed.
Text,
// A per-second value.
PerSecond,
// Graph types:
// A graph of the last N values.
RunningGraph,
// A histogram of the last N values (values between 0 and 1).
RunningHistogram,
InvalidEnum,
EnumCount = InvalidEnum,
};
namespace overlay
{
class Text;
class Widget
{
public:
virtual ~Widget() {}
virtual const Text *getDescriptionWidget() const;
protected:
WidgetType type;
// Whether this item should be drawn.
bool enabled = false;
// For text items, size of the font. This is a value in [0, overlay::kFontMipCount) which
// determines the font size to use.
int fontSize;
// The area covered by the item, predetermined by the overlay class. Negative values
// indicate offset from the left/bottom of the image.
int32_t coords[4];
float color[4];
// In some cases, a widget may need to match its contents (e.g. graph height scaling) with
// another related widget. In such a case, this pointer will point to the widget it needs to
// match to.
Widget *matchToWidget;
friend class gl::Overlay;
friend class gl::OverlayState;
friend class overlay_impl::AppendWidgetDataHelper;
};
class Count : public Widget
{
public:
~Count() override {}
void add(uint64_t n) { count += n; }
void set(uint64_t n) { count = n; }
void reset() { count = 0; }
protected:
uint64_t count = 0;
friend class gl::Overlay;
friend class overlay_impl::AppendWidgetDataHelper;
};
class PerSecond : public Count
{
public:
~PerSecond() override {}
protected:
uint64_t lastPerSecondCount = 0;
friend class gl::Overlay;
friend class overlay_impl::AppendWidgetDataHelper;
};
class Text : public Widget
{
public:
~Text() override {}
void set(std::string &&str) { text = std::move(str); }
protected:
std::string text;
friend class overlay_impl::AppendWidgetDataHelper;
};
class RunningGraph : public Widget
{
public:
// Out of line constructor to satisfy chromium-style.
RunningGraph(size_t n);
~RunningGraph() override;
void add(uint64_t n)
{
if (!ignoreFirstValue)
{
runningValues[lastValueIndex] += n;
}
}
void next()
{
if (ignoreFirstValue)
{
ignoreFirstValue = false;
}
else
{
lastValueIndex = (lastValueIndex + 1) % runningValues.size();
runningValues[lastValueIndex] = 0;
}
}
const Text *getDescriptionWidget() const override;
protected:
std::vector<uint64_t> runningValues;
size_t lastValueIndex = 0;
Text description;
bool ignoreFirstValue = true;
friend class gl::Overlay;
friend class gl::OverlayState;
friend class overlay_impl::AppendWidgetDataHelper;
};
class RunningHistogram : public RunningGraph
{
public:
RunningHistogram(size_t n) : RunningGraph(n) {}
~RunningHistogram() override {}
void set(float n)
{
ASSERT(n >= 0.0f && n <= 1.0f);
uint64_t rank =
n == 1.0f ? runningValues.size() - 1 : static_cast<uint64_t>(n * runningValues.size());
runningValues[lastValueIndex] = rank;
}
private:
// Do not use the add() function from RunningGraph
using RunningGraph::add;
};
// If overlay is disabled, all the above classes would be replaced with Mock, turning them into
// noop.
class Mock
{
public:
void reset() const {}
template <typename T>
void set(T) const
{}
template <typename T>
void add(T) const
{}
void next() const {}
};
} // namespace overlay
} // namespace gl
#endif // LIBANGLE_OVERLAYWIDGETS_H_
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