C++ console application using double buffer size limitation - c++

Question

# include "DISPLAY.h"
DoubleBuffer::DoubleBuffer()
{
COORD size = { WINDOW_X_SIZE , WINDOW_Y_SIZE };
SMALL_RECT rect;
rect.Left = 0;
rect.Right = WINDOW_X_SIZE - 1;
rect.Top = 0;
rect.Bottom = WINDOW_Y_SIZE - 1;
hBuffer[0] = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
SetConsoleScreenBufferSize(hBuffer[0], size);
SetConsoleWindowInfo(hBuffer[0], TRUE, &rect);
hBuffer[1] = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
SetConsoleScreenBufferSize(hBuffer[1], size);
SetConsoleWindowInfo(hBuffer[1], TRUE, &rect);
CONSOLE_CURSOR_INFO cursorinfo;
cursorinfo.dwSize = 1;
cursorinfo.bVisible = FALSE;
SetConsoleCursorInfo(hBuffer[0], &cursorinfo);
SetConsoleCursorInfo(hBuffer[1], &cursorinfo);
nBufferIndex = 0;
}
void DoubleBuffer::WriteBuffer(int x, int y, char *string)
{
DWORD dw;
COORD startposition = { x,y };
SetConsoleCursorPosition(hBuffer[nBufferIndex], startposition);
WriteFile(hBuffer[nBufferIndex], string, strlen(string), &dw, NULL);
}
void DoubleBuffer::FlippBuffer()
{
Sleep(1000);
SetConsoleActiveScreenBuffer(hBuffer[nBufferIndex]);
nBufferIndex = !nBufferIndex;
}
void DoubleBuffer::ClearBuffer()
{
COORD coord = { 0,0 };
DWORD dw;
FillConsoleOutputCharacter(hBuffer[nBufferIndex], ' ', WINDOW_X_SIZE*WINDOW_Y_SIZE, coord, &dw);
}
void DoubleBuffer::ReleaseBuffer()
{
CloseHandle(hBuffer[0]);
CloseHandle(hBuffer[1]);
}
I used this code to construct a double buffer.
The entire game map which would be printed at the function 'WriteBuffer' was designed as a 1D char array.
But a big problem is that if the length of string goes over 80, then the console just shows 80 character in one line regardless of the console window size.
I mean, for example the input string is
char 1D_map[90] = {'D'};
and the console window size is 5*20.
Then no matter what the window size is, it shows like behind.
DDDDD (.. the left 70 characters are hidden..)
DDDDD (.. the left 5 character are hidden..)
As I pull the side bar of window to its maximum, it shows like behind.
DDDDDDDDDDDDDDDD ... 80 characters ... DDDDDDDDDDDDDDDDD
DDDDDDDDDD
So when I use these codes, then I cannot adjust the game map size.
(concretely horizontal size.)
Because whatever I do, it just shows 80 characters in a line!!
Can I fix the problem? or Should I apply other double buffering method?