136 lines
5.0 KiB
C++
136 lines
5.0 KiB
C++
#include <windows.h>
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#include <string>
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#include <complex>
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const int BMP_SIZE = 600, ITERATIONS = 512;
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const long double FCT = 2.85, hFCT = FCT / 2.0;
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class myBitmap {
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public:
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myBitmap() : pen( NULL ), brush( NULL ), clr( 0 ), wid( 1 ) {}
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~myBitmap() {
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DeleteObject( pen ); DeleteObject( brush );
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DeleteDC( hdc ); DeleteObject( bmp );
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}
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bool create( int w, int h ) {
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BITMAPINFO bi;
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ZeroMemory( &bi, sizeof( bi ) );
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bi.bmiHeader.biSize = sizeof( bi.bmiHeader );
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bi.bmiHeader.biBitCount = sizeof( DWORD ) * 8;
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bi.bmiHeader.biCompression = BI_RGB;
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biWidth = w;
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bi.bmiHeader.biHeight = -h;
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HDC dc = GetDC( GetConsoleWindow() );
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bmp = CreateDIBSection( dc, &bi, DIB_RGB_COLORS, &pBits, NULL, 0 );
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if( !bmp ) return false;
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hdc = CreateCompatibleDC( dc );
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SelectObject( hdc, bmp );
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ReleaseDC( GetConsoleWindow(), dc );
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width = w; height = h;
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return true;
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}
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void clear( BYTE clr = 0 ) {
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memset( pBits, clr, width * height * sizeof( DWORD ) );
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}
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void setBrushColor( DWORD bClr ) {
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if( brush ) DeleteObject( brush );
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brush = CreateSolidBrush( bClr );
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SelectObject( hdc, brush );
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}
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void setPenColor( DWORD c ) {
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clr = c; createPen();
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}
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void setPenWidth( int w ) {
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wid = w; createPen();
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}
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void saveBitmap( std::string path ) {
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BITMAPFILEHEADER fileheader;
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BITMAPINFO infoheader;
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BITMAP bitmap;
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DWORD wb;
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GetObject( bmp, sizeof( bitmap ), &bitmap );
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DWORD* dwpBits = new DWORD[bitmap.bmWidth * bitmap.bmHeight];
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ZeroMemory( dwpBits, bitmap.bmWidth * bitmap.bmHeight * sizeof( DWORD ) );
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ZeroMemory( &infoheader, sizeof( BITMAPINFO ) );
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ZeroMemory( &fileheader, sizeof( BITMAPFILEHEADER ) );
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infoheader.bmiHeader.biBitCount = sizeof( DWORD ) * 8;
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infoheader.bmiHeader.biCompression = BI_RGB;
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infoheader.bmiHeader.biPlanes = 1;
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infoheader.bmiHeader.biSize = sizeof( infoheader.bmiHeader );
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infoheader.bmiHeader.biHeight = bitmap.bmHeight;
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infoheader.bmiHeader.biWidth = bitmap.bmWidth;
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infoheader.bmiHeader.biSizeImage = bitmap.bmWidth * bitmap.bmHeight * sizeof( DWORD );
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fileheader.bfType = 0x4D42;
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fileheader.bfOffBits = sizeof( infoheader.bmiHeader ) + sizeof( BITMAPFILEHEADER );
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fileheader.bfSize = fileheader.bfOffBits + infoheader.bmiHeader.biSizeImage;
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GetDIBits( hdc, bmp, 0, height, ( LPVOID )dwpBits, &infoheader, DIB_RGB_COLORS );
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HANDLE file = CreateFile( path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL, NULL );
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WriteFile( file, &fileheader, sizeof( BITMAPFILEHEADER ), &wb, NULL );
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WriteFile( file, &infoheader.bmiHeader, sizeof( infoheader.bmiHeader ), &wb, NULL );
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WriteFile( file, dwpBits, bitmap.bmWidth * bitmap.bmHeight * 4, &wb, NULL );
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CloseHandle( file );
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delete [] dwpBits;
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}
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HDC getDC() const { return hdc; }
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int getWidth() const { return width; }
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int getHeight() const { return height; }
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DWORD* bits() const { return ( DWORD* )pBits; }
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private:
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void createPen() {
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if( pen ) DeleteObject( pen );
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pen = CreatePen( PS_SOLID, wid, clr );
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SelectObject( hdc, pen );
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}
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HBITMAP bmp; HDC hdc;
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HPEN pen; HBRUSH brush;
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void *pBits; int width, height, wid;
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DWORD clr;
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};
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class julia {
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public:
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void draw( std::complex<long double> k ) {
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bmp.create( BMP_SIZE, BMP_SIZE );
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DWORD* bits = bmp.bits();
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int res, pos;
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std::complex<long double> c, factor( FCT / BMP_SIZE, FCT / BMP_SIZE ) ;
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for( int y = 0; y < BMP_SIZE; y++ ) {
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pos = y * BMP_SIZE;
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c.imag( ( factor.imag() * y ) + -hFCT );
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for( int x = 0; x < BMP_SIZE; x++ ) {
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c.real( factor.real() * x + -hFCT );
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res = inSet( c, k );
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if( res ) {
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int n_res = res % 255;
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if( res < ( ITERATIONS >> 1 ) ) res = RGB( n_res << 2, n_res << 3, n_res << 4 );
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else res = RGB( n_res << 4, n_res << 2, n_res << 5 );
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}
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bits[pos++] = res;
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}
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}
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bmp.saveBitmap( "./js.bmp" );
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}
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private:
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int inSet( std::complex<long double> z, std::complex<long double> c ) {
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long double dist;//, three = 3.0;
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for( int ec = 0; ec < ITERATIONS; ec++ ) {
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z = z * z; z = z + c;
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dist = ( z.imag() * z.imag() ) + ( z.real() * z.real() );
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if( dist > 3 ) return( ec );
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}
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return 0;
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}
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myBitmap bmp;
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};
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int main( int argc, char* argv[] ) {
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std::complex<long double> c;
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long double factor = FCT / BMP_SIZE;
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c.imag( ( factor * 184 ) + -1.4 );
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c.real( ( factor * 307 ) + -2.0 );
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julia j; j.draw( c ); return 0;
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}
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