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#include <ClanLib/core.h>
#include <ClanLib/application.h>
#include <ClanLib/display.h>
#include <ClanLib/gl.h>
#include "cl_writepng.h"
class ScreenShotApp : public CL_ClanApplication
{
public:
CL_PixelBuffer take_screen_shot()
{
CL_PixelBuffer back_buffer = CL_Display::get_current_window()->get_back_buffer();
back_buffer.lock();
unsigned short width = back_buffer.get_width();
unsigned short height = back_buffer.get_height();
CL_PixelBuffer pbuf(width, height, width*3, CL_PixelFormat::rgb888);
back_buffer.convert(pbuf);
back_buffer.unlock();
return pbuf;
}
virtual int main(int, char **)
{
// Create a console window for text-output if not available
CL_ConsoleWindow console("Console");
console.redirect_stdio();
try
{
CL_SetupCore setup_core;
CL_SetupDisplay setup_display;
CL_SetupGL setup_gl;
// Set mode: 320x200 16 bpp
CL_DisplayWindow window("screenshot example", 320, 200, false );
std::cout << "Press space to take a screenshot" << std::endl;
// Loop until the user hits escape:
while (CL_Keyboard::get_keycode(CL_KEY_ESCAPE) == false)
{
// CL_Color contains a long list of static colours you can use,
// like black, white, beige, cornflowerblue. Check reference
// for full list.
CL_Display::clear(CL_Color::black);
// Let's draw something
CL_Display::fill_rect(
CL_Rect(1,1,200,200),
CL_Gradient(
CL_Color::cyan,
CL_Color::red,
CL_Color::blue,
CL_Color::green));
CL_Display::fill_rect(
CL_Rect(1,1,50,50),
CL_Color::cyan );
CL_Display::fill_rect(
CL_Rect(50,50,100,100),
CL_Color::magenta );
CL_Display::fill_rect(
CL_Rect(150,150,200,200),
CL_Color::yellow );
// Make sure our updates are displayed
CL_Display::flip();
// Update keyboard input and handle system events:
// Exits the loop if ClanLib requests shutdown - for instance if
// someone closes the window.
CL_System::keep_alive(10);
// If someone pressed SPACE
if(CL_Keyboard::get_keycode(CL_KEY_SPACE))
{
// Save a screenshot
std::cout << "Saving png..." << std::endl;
CL_PixelBuffer screenshot = take_screen_shot();
WritePNG::write_png( screenshot, "screenshot.png" );
}
}
}
catch (CL_Error err)
{
std::cout << "Error: " << err.message.c_str() << std::endl;
// Display console close message and wait for a key
console.display_close_message();
}
return 0;
}
} app;
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