340 lines
9.4 KiB
C++
340 lines
9.4 KiB
C++
/***********************************************************************
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* rotozoomer.cpp - Rotozoomer effect demo *
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* *
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* This file is part of the Final Cut widget toolkit *
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* *
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* Copyright 2020 Markus Gans *
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* *
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* The Final Cut is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Lesser General Public License *
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* as published by the Free Software Foundation; either version 3 of *
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* the License, or (at your option) any later version. *
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* *
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* The Final Cut is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this program. If not, see *
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* <http://www.gnu.org/licenses/>. *
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***********************************************************************/
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#include <chrono>
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#include <iomanip>
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#include <cmath>
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#include <final/final.h>
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namespace fc = finalcut::fc;
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using namespace std::chrono;
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using finalcut::FPoint;
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using finalcut::FSize;
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// This rotozoomer demo is based on the code of Robert Dörfler
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// http://bloerp.de/code/tempel/roto.c
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// http://bloerp.de/code/tempel/tempel-des-codes.html
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//----------------------------------------------------------------------
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// class RotoZoomer
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//----------------------------------------------------------------------
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class RotoZoomer final : public finalcut::FDialog
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{
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public:
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// Constructor
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explicit RotoZoomer (finalcut::FWidget* = nullptr, bool = false, int = 314);
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// Destructor
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~RotoZoomer() override;
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// Accessors
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finalcut::FString getReport();
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// Event handlers
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void onShow (finalcut::FShowEvent*) override;
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void onTimer (finalcut::FTimerEvent*) override;
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void onKeyPress (finalcut::FKeyEvent*) override;
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void onClose (finalcut::FCloseEvent*) override;
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private:
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// Methods
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void draw() override;
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void rotozoomer (double, double, double, double);
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void generateReport();
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void adjustSize() override;
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// Data member
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bool benchmark{false};
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int loops{0};
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int path{0};
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wchar_t data[256]{};
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finalcut::FString report{};
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time_point<system_clock> start{};
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time_point<system_clock> end{};
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};
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//----------------------------------------------------------------------
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RotoZoomer::RotoZoomer (finalcut::FWidget* parent, bool b, int l)
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: finalcut::FDialog(parent)
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, benchmark(b)
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, loops(l)
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{
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setText ("Rotozoomer effect");
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int h{0};
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for (int j{0}; j < 8; j++)
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{
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for (int i{0}; i < 8; i++)
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{
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data[h++] = L' ';
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}
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for (int i{0}; i < 8; i++)
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{
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data[h++] = L'+';
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}
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}
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for (int j{0}; j < 8; j++)
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{
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for (int i{0}; i < 8; i++)
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{
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data[h++] = L'x';
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}
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for (int i{0}; i < 8; i++)
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{
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data[h++] = L' ';
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}
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}
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}
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//----------------------------------------------------------------------
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RotoZoomer::~RotoZoomer()
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{ }
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//----------------------------------------------------------------------
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void RotoZoomer::draw()
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{
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if ( benchmark && start == time_point<system_clock>() )
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start = system_clock::now();
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finalcut::FDialog::draw();
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double cx = double(80.0 / 2.0 + (80.0 / 2.0 * std::sin(double(path) / 50.0)));
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double cy = double(23.0 + (23.0 * std::cos(double(path) / 50.0)));
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double r = double(128.0 + 96.0 * std::cos(double(path) / 10.0));
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double a = double(path) / 50.0;
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rotozoomer (cx, cy, r, a);
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}
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//----------------------------------------------------------------------
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void RotoZoomer::rotozoomer (double cx, double cy, double r, double a)
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{
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const int Cols = int(getClientWidth());
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const int Lines = int(getClientHeight());
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int Ax = int(4096.0 * (cx + r * std::cos(a)));
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int Ay = int(4096.0 * (cy + r * std::sin(a)));
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int Bx = int(4096.0 * (cx + r * std::cos(a + 2.02358)));
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int By = int(4096.0 * (cy + r * std::sin(a + 2.02358)));
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int Cx = int(4096.0 * (cx + r * std::cos(a - 1.11701)));
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int Cy = int(4096.0 * (cy + r * std::sin(a - 1.11701)));
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int dxdx = (Bx - Ax) / 80;
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int dydx = (By - Ay) / 80;
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int dxdy = (Cx - Ax) / 23;
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int dydy = (Cy - Ay) / 23;
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for (int y = 0; y < Lines; y++)
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{
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Cx = Ax;
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Cy = Ay;
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print() << FPoint(2, 3 + y);
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for (int x = 0; x < Cols; x++)
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{
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wchar_t ch = data[((Cy >> 14) & 0xf) + ((Cx >> 10) & 0xf0)];
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if ( ch == '+' )
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print() << finalcut::FColorPair(fc::Black, fc::Red);
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else if ( ch == 'x' )
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print() << finalcut::FColorPair(fc::Black, fc::Cyan);
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else
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print() << finalcut::FColorPair(fc::Black, fc::White);
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print() << ch;
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Cx += dxdx;
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Cy += dydx;
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}
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Ax += dxdy;
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Ay += dydy;
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}
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}
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//----------------------------------------------------------------------
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void RotoZoomer::generateReport()
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{
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finalcut::FString term_type = getTermType();
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finalcut::FString dimension_str{};
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finalcut::FString time_str{};
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finalcut::FString fps_str{};
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std::wostringstream rep;
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dimension_str << getDesktopWidth()
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<< "x" << getDesktopHeight();
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int elapsed_ms = int(duration_cast<milliseconds>(end - start).count());
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time_str << double(elapsed_ms) / 1000 << "ms";
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fps_str << double(loops) * 1000.0 / double(elapsed_ms);
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rep << finalcut::FString(55, '-') << "\n"
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<< "Terminal Size Time Loops Frame rate\n"
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<< finalcut::FString(55, '-') << "\n"
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<< std::left << std::setw(20) << term_type
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<< std::setw(8) << dimension_str
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<< std::setw(10) << time_str
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<< std::setw(7) << loops
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<< std::setw(7) << fps_str.left(7) << "fps\n";
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report << rep.str();
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}
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//----------------------------------------------------------------------
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inline finalcut::FString RotoZoomer::getReport()
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{
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return report;
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}
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//----------------------------------------------------------------------
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void RotoZoomer::onShow (finalcut::FShowEvent*)
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{
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if ( ! benchmark )
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addTimer(33); // Starts the timer every 33 milliseconds
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else
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{
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for (path = 1; path < loops; path++)
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{
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redraw();
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updateTerminal();
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}
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end = system_clock::now();
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generateReport();
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flush();
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quit();
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}
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}
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//----------------------------------------------------------------------
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void RotoZoomer::onTimer (finalcut::FTimerEvent*)
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{
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if ( path >= 314 ) // More than 360 degrees
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path = 0;
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else
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path++;
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redraw();
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updateTerminal();
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flush();
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}
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//----------------------------------------------------------------------
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void RotoZoomer::onKeyPress (finalcut::FKeyEvent* ev)
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{
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if ( ! ev )
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return;
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if ( ev->key() == 'q' )
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{
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close();
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ev->accept();
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}
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else
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finalcut::FDialog::onKeyPress(ev);
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}
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//----------------------------------------------------------------------
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void RotoZoomer::onClose (finalcut::FCloseEvent* ev)
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{
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if ( ! benchmark )
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finalcut::FApplication::closeConfirmationDialog (this, ev);
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}
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//----------------------------------------------------------------------
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void RotoZoomer::adjustSize()
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{
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if ( ! benchmark )
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{
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std::size_t h = getDesktopHeight();
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std::size_t w = getDesktopWidth();
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if ( h > 1 )
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h--;
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if ( w > 8 )
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w -= 8;
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setGeometry(FPoint(5, 1), FSize(w, h), false);
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}
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finalcut::FDialog::adjustSize();
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}
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//----------------------------------------------------------------------
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// main part
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//----------------------------------------------------------------------
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int main (int argc, char* argv[])
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{
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constexpr int iterations = 314;
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bool benchmark{false};
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finalcut::FString report{};
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int quit_code{0};
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if ( argv[1] && ( strcmp(argv[1], "--help") == 0
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|| strcmp(argv[1], "-h") == 0 ) )
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{
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std::cout << "RotoZoomer options:\n"
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<< " -b, --benchmark "
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<< "Starting a benchmark run\n\n";
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}
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else if ( argv[1] && ( strcmp(argv[1], "--benchmark") == 0
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|| strcmp(argv[1], "-b") == 0 ) )
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{
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benchmark = true;
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}
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{ // Create the application object in this scope
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finalcut::FApplication app(argc, argv);
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app.setNonBlockingRead();
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// Create a simple dialog box
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RotoZoomer roto(&app, benchmark, iterations);
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if ( benchmark )
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roto.setGeometry (FPoint(1, 1), FSize(80, 24));
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else
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roto.setGeometry (FPoint(5, 1), FSize(72, 23));
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roto.setShadow();
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// Set the RotoZoomer object as main widget
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finalcut::FWidget::setMainWidget(&roto);
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// Show and start the application
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roto.show();
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quit_code = app.exec();
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if ( benchmark )
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report = roto.getReport();
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} // Hide and destroy the application object
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if ( benchmark )
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{
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std::cout << "Benchmark:\n" << report;
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}
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return quit_code;
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}
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