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/**
* Copyright (C) 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// #define LOG_NDEBUG 0
#pragma once
#include "BackgroundExecutor.h"
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wconversion"
#include <SkCanvas.h>
#include <SkPaint.h>
#pragma clang diagnostic pop
#include <gui/SurfaceComposerClient.h>
#include <utils/StrongPointer.h>
namespace android {
inline constexpr int kDigitWidth = 64;
inline constexpr int kDigitHeight = 100;
inline constexpr int kDigitSpace = 16;
// HdrSdrRatioOverlay re-uses this value though it doesn't really need such amount buffer.
// for output good-looking and code conciseness.
inline constexpr int kMaxDigits = /*displayFps*/ 3 + /*renderFps*/ 3 + /*spinner*/ 1;
inline constexpr int kBufferWidth = kMaxDigits * kDigitWidth + (kMaxDigits - 1) * kDigitSpace;
inline constexpr int kBufferHeight = kDigitHeight;
class SurfaceControl;
// Helper class to delete the SurfaceControl on a helper thread as
// SurfaceControl assumes its destruction happens without SurfaceFlinger::mStateLock held.
class SurfaceControlHolder {
public:
explicit SurfaceControlHolder(sp<SurfaceControl> sc) : mSurfaceControl(std::move(sc)){};
~SurfaceControlHolder() {
// Hand the sp<SurfaceControl> to the helper thread to release the last
// reference. This makes sure that the SurfaceControl is destructed without
// SurfaceFlinger::mStateLock held.
BackgroundExecutor::getInstance().sendCallbacks(
{[sc = std::move(mSurfaceControl)]() mutable { sc.clear(); }});
}
static std::unique_ptr<SurfaceControlHolder> createSurfaceControlHolder(const String8& name) {
sp<SurfaceControl> surfaceControl =
SurfaceComposerClient::getDefault()
->createSurface(name, kBufferWidth, kBufferHeight, PIXEL_FORMAT_RGBA_8888,
ISurfaceComposerClient::eFXSurfaceBufferState);
return std::make_unique<SurfaceControlHolder>(std::move(surfaceControl));
}
const sp<SurfaceControl>& get() const { return mSurfaceControl; }
private:
sp<SurfaceControl> mSurfaceControl;
};
// Helper class to draw digit and decimal point.
class SegmentDrawer {
public:
enum class Segment {
Upper,
UpperLeft,
UpperRight,
Middle,
LowerLeft,
LowerRight,
Bottom,
DecimalPoint
};
static void drawSegment(Segment segment, int left, SkColor color, SkCanvas& canvas) {
const SkRect rect = [&]() {
switch (segment) {
case Segment::Upper:
return SkRect::MakeLTRB(left, 0, left + kDigitWidth, kDigitSpace);
case Segment::UpperLeft:
return SkRect::MakeLTRB(left, 0, left + kDigitSpace, kDigitHeight / 2.);
case Segment::UpperRight:
return SkRect::MakeLTRB(left + kDigitWidth - kDigitSpace, 0, left + kDigitWidth,
kDigitHeight / 2.);
case Segment::Middle:
return SkRect::MakeLTRB(left, kDigitHeight / 2. - kDigitSpace / 2.,
left + kDigitWidth,
kDigitHeight / 2. + kDigitSpace / 2.);
case Segment::LowerLeft:
return SkRect::MakeLTRB(left, kDigitHeight / 2., left + kDigitSpace,
kDigitHeight);
case Segment::LowerRight:
return SkRect::MakeLTRB(left + kDigitWidth - kDigitSpace, kDigitHeight / 2.,
left + kDigitWidth, kDigitHeight);
case Segment::Bottom:
return SkRect::MakeLTRB(left, kDigitHeight - kDigitSpace, left + kDigitWidth,
kDigitHeight);
case Segment::DecimalPoint:
return SkRect::MakeLTRB(left, kDigitHeight - kDigitSpace, left + kDigitSpace,
kDigitHeight);
}
}();
SkPaint paint;
paint.setColor(color);
paint.setBlendMode(SkBlendMode::kSrc);
canvas.drawRect(rect, paint);
}
static void drawDigit(int digit, int left, SkColor color, SkCanvas& canvas) {
if (digit < 0 || digit > 9) return;
if (digit == 0 || digit == 2 || digit == 3 || digit == 5 || digit == 6 || digit == 7 ||
digit == 8 || digit == 9)
drawSegment(Segment::Upper, left, color, canvas);
if (digit == 0 || digit == 4 || digit == 5 || digit == 6 || digit == 8 || digit == 9)
drawSegment(Segment::UpperLeft, left, color, canvas);
if (digit == 0 || digit == 1 || digit == 2 || digit == 3 || digit == 4 || digit == 7 ||
digit == 8 || digit == 9)
drawSegment(Segment::UpperRight, left, color, canvas);
if (digit == 2 || digit == 3 || digit == 4 || digit == 5 || digit == 6 || digit == 8 ||
digit == 9)
drawSegment(Segment::Middle, left, color, canvas);
if (digit == 0 || digit == 2 || digit == 6 || digit == 8)
drawSegment(Segment::LowerLeft, left, color, canvas);
if (digit == 0 || digit == 1 || digit == 3 || digit == 4 || digit == 5 || digit == 6 ||
digit == 7 || digit == 8 || digit == 9)
drawSegment(Segment::LowerRight, left, color, canvas);
if (digit == 0 || digit == 2 || digit == 3 || digit == 5 || digit == 6 || digit == 8 ||
digit == 9)
drawSegment(Segment::Bottom, left, color, canvas);
}
};
} // namespace android
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