Function CommitConsole

IntelPresentMon/SampleClient/Console.cpp:70–121

}

void CommitConsole()
{
    auto sizeWritten = gConsoleWriteBufferIndex;
    auto linesWritten = static_cast<SHORT>(sizeWritten / gConsoleWidth);

    // Reset gConsoleTop on the first commit so we don't overwrite any warning
    // messages.
    auto size = sizeWritten;
    if (gConsoleFirstCommit) {
        gConsoleFirstCommit = false;

        CONSOLE_SCREEN_BUFFER_INFO info = {};
        GetConsoleScreenBufferInfo(gConsoleHandle, &info);
        gConsoleTop = info.dwCursorPosition.Y;
    } else {
        // Write some extra empty lines to make sure we clear anything from
        // last time.
        if (size < gConsolePrevWriteBufferSize) {
            memset(gConsoleWriteBuffer + size, ' ', gConsolePrevWriteBufferSize - size);
            size = gConsolePrevWriteBufferSize;
        }
    }

    // If we're at the end of the console buffer, issue some new lines to make
    // some space.
    auto maxCursorY = gConsoleBufferHeight - linesWritten;
    if (gConsoleTop > maxCursorY) {
        COORD bottom = { 0, static_cast<SHORT>(gConsoleBufferHeight - 1)};
        SetConsoleCursorPosition(gConsoleHandle, bottom);
        printf("\n");
        for (--gConsoleTop; gConsoleTop > maxCursorY; --gConsoleTop) {
            printf("\n");
        }
    }

    // Write to the console.
    DWORD dwCharsWritten = 0;
    COORD cursor = { 0, gConsoleTop };
    WriteConsoleOutputCharacterA(gConsoleHandle, gConsoleWriteBuffer, static_cast<DWORD>(size), cursor, &dwCharsWritten);

    // Put the cursor at the end of the written text.
    cursor.Y += linesWritten;
    SetConsoleCursorPosition(gConsoleHandle, cursor);

    // Update console info in case it was resized.
    CONSOLE_SCREEN_BUFFER_INFO info = {};
    GetConsoleScreenBufferInfo(gConsoleHandle, &info);
    gConsoleWidth = info.srWindow.Right - info.srWindow.Left + 1;
    gConsoleBufferHeight = info.dwSize.Y;
    gConsoleWriteBufferIndex = 0;
    gConsolePrevWriteBufferSize = sizeWritten;
}