SimulatedBppDisplay.cpp

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/*
 * This file is part of the DUDS project. It is subject to the BSD-style
 * license terms in the LICENSE file found in the top-level directory of this
 * distribution and at https://github.com/jjackowski/duds/blob/master/LICENSE.
 * No part of DUDS, including this file, may be copied, modified, propagated,
 * or distributed except according to the terms contained in the LICENSE file.
 *
 * Copyright (C) 2020  Jeff Jackowski
 */

#include <duds/hardware/devices/displays/SimulatedBppDisplay.hpp>
#include <duds/hardware/display/DisplayErrors.hpp>
#include <duds/general/Errors.hpp>
#include <iostream>

namespace duds { namespace hardware { namespace devices { namespace displays {

SimulatedBppDisplay::SimulatedBppDisplay() { }

SimulatedBppDisplay::SimulatedBppDisplay(
    const duds::ui::graphics::ImageDimensions &id
) : duds::hardware::display::BppGraphicDisplay(id)
{ }  // all done above

void SimulatedBppDisplay::configure(const duds::ui::graphics::ImageDimensions &id) {
    // range check on display size
    if (id.empty()) {
        DUDS_THROW_EXCEPTION(duds::hardware::display::DisplaySizeError() <<
            duds::ui::graphics::ImageErrorDimensions(id)
        );
    }
    frmbuf.resize(id);
    bottom = false;
}

void SimulatedBppDisplay::outputFrame(const duds::ui::graphics::BppImage *img) {
    if (bottom) {
        // return cursor to top
        std::cout << "\033[" << height() + 2 << 'A';
    }
    bottom = true;
    // output border
    std::cout << '*';
    for (int w = width(); w > 0; --w) {
        std::cout << '-';
    }
    std::cout << "*\n";
    // output image
    for (int h = 0; h < height(); ++h) {
        // start border
        std::cout << '|';
        // initialize pointer to the start of the line
        const duds::ui::graphics::BppImage::PixelBlock *pb = img->bufferLine(h);
        // setup the mask for the bit to check
        duds::ui::graphics::BppImage::PixelBlock mask = 1;
        // go through the whole width
        for (int w = width(); w > 0; --w) {
            // check for set pixel
            if (*pb & mask) {
                std::cout << 'X';
            } else {
                std::cout << ' ';
            }
            // advance to next pixel
            mask <<= 1;
            // gone past the end of the pixel block?
            if (!mask) {
                // advance to the next block
                mask = 1;
                ++pb;
            }
        }
        // end border
        std::cout << "|\n";
    }
    // output border
    std::cout << '*';
    for (int w = width(); w > 0; --w) {
        std::cout << '-';
    }
    std::cout << '*' << std::endl;
}

} } } }