Graphics

geocyt wrote:

i'm finding difficulty in my c++ console graphics. any one with any idea how to go about it?

geocyt wrote:

i'm also thinking about how to control my keyboard input. you know stopping the keyboard from appearing on the console and display something simultaneously like ( password -> ********)

ConsoleKeyInfo keyPress;

// Loop while user entering password
            keyPress = Console::ReadKey(true);
            Console::Write("*");
            // handle keypress

Shog9 wrote:

Traditionally, you'd use a Curses library

Bitmap b = new Bitmap(filename);
Rectangle r = new Rectangle();
int topLeft = b.Width, topRight = 0, topUpper = b.Height, topBottom = 0;
string whitePixel = "ffffffff";

for (int y = 1; y < b.Height; y++)
{
    for (int x = 1; x < b.Width; x++)
    {
        if (b.GetPixel(x, y).Name != whitePixel)
        {
if (x < topLeft)
    topLeft = x;

if (x > topRight)
    topRight = x;

if (y < topUpper)
    topUpper = y;

if (y > topBottom)
    topBottom = y;
        }
    }
}

r.Location = new Point(topLeft-1, topUpper-1);
r.Size = new Size((topRight - topLeft)+1, (topBottom - topUpper)+1);
Bitmap b2 = b.Clone(r, b.PixelFormat);
b2.Save(newfilename, ImageFormat.Gif);

void set_pixel(long x,long y, RGBTRIPLE colour){	
	image[(bmp.biHeight-1-y)*bmp.biWidth+x] = colour;
}

void get_pixel(int x, int y, RGBTRIPLE colour){
	colour = image[(bmp.biHeight-1-y)*bmp.biWidth+x];
	}



void clear_pixel(RGBTRIPLE colour){
	colour.rgbtBlue = 0;
	colour.rgbtGreen = 0;
	colour.rgbtRed = 0;
}


void avg(RGBTRIPLE colour[], RGBTRIPLE merge, int size) {
    unsigned int blue = 0, green = 0, red = 0;
	for(int i=0; i<size; i++)="" {<br="" mode="hold" />		blue += colour[i].rgbtBlue;
		green += colour[i].rgbtGreen;
		red += colour[i].rgbtRed;
    }
	merge.rgbtBlue = blue / size;
	merge.rgbtGreen= green / size;
	merge.rgbtRed  = red / size;
}

<small>
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    LPSTR lpCmdLine, int nCmdShow)
{
	
ZeroMemory (&bmp, sizeof bmp);
		bmp.biClrImportant  = 0;
		bmp.biBitCount      = 4;
		bmp.biCompression   = 0;
		bmp.biPlanes        = 1;
		bmp.biSize          = 40;
		bmp.biSizeImage     = 0;
		bmp.biXPelsPerMeter = 0;
		bmp.biYPelsPerMeter = 0;
		bmp.biClrUsed       = 16;
		bmp.biHeight        = 128;
		bmp.biWidth         = 128;

		long paddedsize = bmp.biHeight * bmp.biWidth;
		bfh.bfType = 19778;
		bfh.bfReserved1 = 0;
		bfh.bfReserved2 = 0;
		bfh.bfOffBits = 1078;
		bfh.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + paddedsize;
		

hfile = CreateFile("noise.bmp",GENERIC_WRITE,FILE_SHARE_WRITE,NULL,OPEN_EXISTING,NULL,NULL);

ReadFile(hfile,&bfh,sizeof(bfh),&written,NULL);
ReadFile(hfile,&bmp,sizeof(bmp),&written,NULL);

int imagesize = bmp.biWidth*bmp.biHeight;
image = new RGBTRIPLE[imagesize]; 
ReadFile(hfile,image,sizeof(RGBTRIPLE),&written,NULL);</small>

RGBTRIPLE blank[9]= { 0 };
RGBTRIPLE Merge   = { 0  , 0 , 0  };
long yp=0, xp=0;



for(int y = 0; y < bmp.biHeight; y=y+3){
	for(int x = 0; x < bmp.biWidth; x=x+3){
		for(int i = 0; i < 9; i++){
		int yp=0, xp=0;
		get_pixel(x+xp,y+yp,blank[i]);  // blank is an RGBTRIPLE array
		if(xp<3)
			xp++;
		else{
			xp = 0;
			yp++;
		}		}
		avg(blank, Merge, 9);
		set_pixel(x,y,Merge);
		for(int i = 0; i < 9; i++){
			blank[i].rgbtBlue=0;
			blank[i].rgbtGreen=0;
			blank[i].rgbtRed=0;
		}
		clear_pixel(Merge);
		yp=0, xp=0;
}}