finalcut/examples/rotozoomer.cpp

346 lines
9.8 KiB
C++

/***********************************************************************
* rotozoomer.cpp - Rotozoomer effect demo *
* *
* This file is part of the FINAL CUT widget toolkit *
* *
* Copyright 2020-2021 Markus Gans *
* *
* FINAL CUT is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 3 of *
* the License, or (at your option) any later version. *
* *
* FINAL CUT is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
***********************************************************************/
#include <cmath>
#include <chrono>
#include <iomanip>
#include <string>
#include <final/final.h>
using std::chrono::duration_cast;
using std::chrono::milliseconds;
using std::chrono::system_clock;
using std::chrono::time_point;
using finalcut::FPoint;
using finalcut::FSize;
using finalcut::FColor;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// This rotozoomer demo is based on the code of Robert Dörfler
// http://bloerp.de/code/tempel/roto.c
// http://bloerp.de/code/tempel/tempel-des-codes.html
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//----------------------------------------------------------------------
// class RotoZoomer
//----------------------------------------------------------------------
class RotoZoomer final : public finalcut::FDialog
{
public:
// Constructor
explicit RotoZoomer (finalcut::FWidget* = nullptr, bool = false, int = 314);
// Destructor
~RotoZoomer() override = default;
// Accessors
finalcut::FString getReport() const;
// Event handlers
void onShow (finalcut::FShowEvent*) override;
void onTimer (finalcut::FTimerEvent*) override;
void onKeyPress (finalcut::FKeyEvent*) override;
void onClose (finalcut::FCloseEvent*) override;
private:
// Methods
void draw() override;
void rotozoomer (double, double, double, double);
void generateReport();
void adjustSize() override;
// Data member
bool benchmark{false};
int loops{0};
int path{0};
std::wstring data{std::wstring(256, L'\0')};
finalcut::FString report{};
time_point<system_clock> start{};
time_point<system_clock> end{};
};
//----------------------------------------------------------------------
RotoZoomer::RotoZoomer (finalcut::FWidget* parent, bool b, int l)
: finalcut::FDialog{parent}
, benchmark{b}
, loops{l}
{
FDialog::setText ("Rotozoomer effect");
std::size_t h{0};
for (std::size_t j{0}; j < 8; j++)
{
for (std::size_t i{0}; i < 8; i++)
{
data[h] = L' ';
h++;
}
for (std::size_t i{0}; i < 8; i++)
{
data[h] = L'+';
h++;
}
}
for (std::size_t j{0}; j < 8; j++)
{
for (std::size_t i{0}; i < 8; i++)
{
data[h] = L'x';
h++;
}
for (std::size_t i{0}; i < 8; i++)
{
data[h] = L' ';
h++;
}
}
}
//----------------------------------------------------------------------
void RotoZoomer::draw()
{
if ( benchmark && start == time_point<system_clock>() )
start = system_clock::now();
finalcut::FDialog::draw();
auto cx = double(80.0 / 2.0 + (80.0 / 2.0 * std::sin(double(path) / 50.0)));
auto cy = double(23.0 + (23.0 * std::cos(double(path) / 50.0)));
auto r = double(128.0 + 96.0 * std::cos(double(path) / 10.0));
auto a = double(path) / 50.0;
rotozoomer (cx, cy, r, a);
}
//----------------------------------------------------------------------
void RotoZoomer::rotozoomer (double cx, double cy, double r, double a)
{
const auto Cols = int(getClientWidth());
const auto Lines = int(getClientHeight());
auto Ax = int(4096.0 * (cx + r * std::cos(a)));
auto Ay = int(4096.0 * (cy + r * std::sin(a)));
auto Bx = int(4096.0 * (cx + r * std::cos(a + 2.02358)));
auto By = int(4096.0 * (cy + r * std::sin(a + 2.02358)));
auto Cx = int(4096.0 * (cx + r * std::cos(a - 1.11701)));
auto Cy = int(4096.0 * (cy + r * std::sin(a - 1.11701)));
int dxdx = (Bx - Ax) / 80;
int dydx = (By - Ay) / 80;
int dxdy = (Cx - Ax) / 23;
int dydy = (Cy - Ay) / 23;
for (auto y = 0; y < Lines; y++)
{
Cx = Ax;
Cy = Ay;
print() << FPoint{2, 3 + y};
for (auto x = 0; x < Cols; x++)
{
auto ch = data[((Cy >> 14) & 0xf) + ((Cx >> 10) & 0xf0)];
if ( ch == '+' )
print() << finalcut::FColorPair{FColor::Black, FColor::Red};
else if ( ch == 'x' )
print() << finalcut::FColorPair{FColor::Black, FColor::Cyan};
else
print() << finalcut::FColorPair{FColor::Black, FColor::White};
print() << ch;
Cx += dxdx;
Cy += dydx;
}
Ax += dxdy;
Ay += dydy;
}
}
//----------------------------------------------------------------------
void RotoZoomer::generateReport()
{
finalcut::FString term_type = finalcut::FTerm::getTermType();
finalcut::FString dimension_str{};
finalcut::FString time_str{};
finalcut::FString fps_str{};
finalcut::FStringStream rep;
dimension_str << getDesktopWidth()
<< "x" << getDesktopHeight();
auto elapsed_ms = int(duration_cast<milliseconds>(end - start).count());
time_str << double(elapsed_ms) / 1000 << "s";
fps_str << double(loops) * 1000.0 / double(elapsed_ms);
rep << finalcut::FString{55, '-'} << "\n"
<< "Terminal Size Time Loops Frame rate\n"
<< finalcut::FString{55, '-'} << "\n"
<< std::left << std::setw(20) << term_type
<< std::setw(8) << dimension_str
<< std::setw(10) << time_str
<< std::setw(7) << loops
<< std::setw(7) << fps_str.left(7) << "fps\n";
report << rep.str();
}
//----------------------------------------------------------------------
inline finalcut::FString RotoZoomer::getReport() const
{
return report;
}
//----------------------------------------------------------------------
void RotoZoomer::onShow (finalcut::FShowEvent*)
{
if ( ! benchmark )
addTimer(33); // Starts the timer every 33 milliseconds
else
{
for (path = 1; path < loops; path++)
{
redraw();
forceTerminalUpdate();
}
end = system_clock::now();
generateReport();
flush();
close();
}
}
//----------------------------------------------------------------------
void RotoZoomer::onTimer (finalcut::FTimerEvent*)
{
if ( path >= 314 ) // More than 360 degrees
path = 0;
else
path++;
redraw();
forceTerminalUpdate();
}
//----------------------------------------------------------------------
void RotoZoomer::onKeyPress (finalcut::FKeyEvent* ev)
{
if ( ! ev )
return;
if ( ev->key() == finalcut::FKey('q') )
{
close();
ev->accept();
}
else
finalcut::FDialog::onKeyPress(ev);
}
//----------------------------------------------------------------------
void RotoZoomer::onClose (finalcut::FCloseEvent* ev)
{
if ( benchmark )
ev->accept();
else
finalcut::FApplication::closeConfirmationDialog (this, ev);
}
//----------------------------------------------------------------------
void RotoZoomer::adjustSize()
{
if ( ! benchmark )
{
std::size_t h = getDesktopHeight();
std::size_t w = getDesktopWidth();
if ( h > 1 )
h--;
if ( w > 8 )
w -= 8;
setGeometry(FPoint{5, 1}, FSize{w, h}, false);
}
finalcut::FDialog::adjustSize();
}
//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
bool benchmark{false};
finalcut::FString report{};
int quit_code{0};
if ( argv[1] && ( strcmp(argv[1], "--help") == 0
|| strcmp(argv[1], "-h") == 0 ) )
{
std::cout << "RotoZoomer options:\n"
<< " -b, --benchmark "
<< "Starting a benchmark run\n\n";
}
else if ( argv[1] && ( strcmp(argv[1], "--benchmark") == 0
|| strcmp(argv[1], "-b") == 0 ) )
{
benchmark = true;
// Disable terminal data requests
auto& start_options = finalcut::FStartOptions::getFStartOptions();
start_options.terminal_data_request = false;
}
{ // Create the application object in this scope
finalcut::FApplication app{argc, argv};
finalcut::FVTerm::setNonBlockingRead();
// Create a simple dialog box
constexpr int iterations = 314;
RotoZoomer roto{&app, benchmark, iterations};
if ( benchmark )
roto.setGeometry (FPoint{1, 1}, FSize{80, 24});
roto.setShadow(); // Instead of the transparent window shadow
// Set the RotoZoomer object as main widget
finalcut::FWidget::setMainWidget(&roto);
// Show and start the application
roto.show();
quit_code = app.exec();
if ( benchmark )
report = roto.getReport();
} // Hide and destroy the application object
if ( benchmark )
{
std::cout << "Benchmark:\n" << report;
}
return quit_code;
}