130 lines
4.8 KiB
C++
130 lines
4.8 KiB
C++
#include <windows.h>
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#include <ctime>
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#include <string>
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const int BMP_SIZE = 600, ITERATIONS = static_cast<int>( 15e5 );
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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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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 fern {
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public:
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void draw() {
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bmp.create( BMP_SIZE, BMP_SIZE );
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float x = 0, y = 0; HDC dc = bmp.getDC();
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int hs = BMP_SIZE >> 1;
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for( int f = 0; f < ITERATIONS; f++ ) {
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SetPixel( dc, hs + static_cast<int>( x * 55.f ),
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BMP_SIZE - 15 - static_cast<int>( y * 55.f ),
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RGB( static_cast<int>( rnd() * 80.f ) + 20,
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static_cast<int>( rnd() * 128.f ) + 128,
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static_cast<int>( rnd() * 80.f ) + 30 ) );
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getXY( x, y );
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}
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bmp.saveBitmap( "./bf.bmp" );
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}
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private:
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void getXY( float& x, float& y ) {
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float g, xl, yl;
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g = rnd();
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if( g < .01f ) { xl = 0; yl = .16f * y; }
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else if( g < .07f ) {
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xl = .2f * x - .26f * y;
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yl = .23f * x + .22f * y + 1.6f;
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} else if( g < .14f ) {
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xl = -.15f * x + .28f * y;
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yl = .26f * x + .24f * y + .44f;
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} else {
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xl = .85f * x + .04f * y;
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yl = -.04f * x + .85f * y + 1.6f;
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}
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x = xl; y = yl;
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}
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float rnd() {
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return static_cast<float>( rand() ) / static_cast<float>( RAND_MAX );
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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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srand( static_cast<unsigned>( time( 0 ) ) );
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fern f; f.draw(); return 0;
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}
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