Function EndConsoleUpdate

PresentMon/Console.cpp:195–245

}

void EndConsoleUpdate()
{
    HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE);

    CONSOLE_SCREEN_BUFFER_INFO info = {};
    GetConsoleScreenBufferInfo(console, &info);

    COORD dstPos;
    dstPos.X = 0;
    dstPos.Y = 0;

    COORD dstSize;
    dstSize.X = info.dwSize.X;
    dstSize.Y = 4;  // 2 should be enough to catch any presentmon stats line, but 4 is more robust
                    // to printing with concurrent resizing of the console.

    CHAR_INFO* buffer = new CHAR_INFO [dstSize.X * dstSize.Y];

    COORD srcPos;
    srcPos.X = 0;
    srcPos.Y = gWritePosition.Y;

    SMALL_RECT rect;
    for ( ; srcPos.Y < info.dwSize.Y; srcPos.Y += dstSize.Y) {
        rect.Left   = 0;
        rect.Top    = srcPos.Y;
        rect.Right  = dstSize.X - 1;
        rect.Bottom = srcPos.Y + dstSize.Y - 1;
        ReadConsoleOutputW(console, buffer, dstSize, dstPos, &rect);

        uint32_t numChars = (uint32_t) (rect.Bottom - rect.Top + 1) * (rect.Right - rect.Left + 1);

        bool clear = false;
        for (uint32_t i = 0; i < numChars; ++i) {
            if (buffer[i].Char.UnicodeChar != L' ') {
                clear = true;
                break;
            }
        }

        if (clear) {
            DWORD numCharsWritten;
            FillConsoleOutputCharacterW(console, L' ', numChars, srcPos, &numCharsWritten);
            assert(numChars == numCharsWritten);
        } else {
            break;
        }
    }

    delete[] buffer;
}

static float CalculateFPSForPrintf(float duration)
{