mirror of
https://github.com/AyuGram/AyuGramDesktop.git
synced 2026-08-06 20:03:12 +00:00
23rd
66 lines
1.3 KiB
C++
66 lines
1.3 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "ui/effects/premium_3d_support.h"
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#include "ui/gl/gl_detection.h"
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#include "ui/power_saving.h"
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namespace Ui::Premium {
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namespace {
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constexpr auto kBezierIterations = 40;
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constexpr auto kBezierEpsilon = 0.00001;
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} // namespace
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float64 CubicBezier(
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float64 x1,
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float64 y1,
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float64 x2,
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float64 y2,
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float64 x) {
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const auto curve = [](float64 t, float64 a, float64 b) {
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return (((1. - 3. * b + 3. * a) * t
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+ (3. * b - 6. * a)) * t
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+ (3. * a)) * t;
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};
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if (x <= 0.) {
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return 0.;
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} else if (x >= 1.) {
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return 1.;
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}
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auto start = 0.;
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auto end = 1.;
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auto t = x;
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for (auto i = 0; i != kBezierIterations; ++i) {
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t = (start + end) / 2.;
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const auto estimate = curve(t, x1, x2);
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if (std::abs(x - estimate) < kBezierEpsilon) {
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break;
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} else if (estimate < x) {
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start = t;
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} else {
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end = t;
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}
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}
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return curve(t, y1, y2);
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}
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bool Object3dSupported() {
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#if QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)
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if (PowerSaving::On(PowerSaving::kAnimations)) {
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return false;
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}
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return GL::WidgetsRhiSupported();
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#else
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return false;
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#endif
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}
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} // namespace Ui::Premium
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