554 lines
15 KiB
JavaScript
554 lines
15 KiB
JavaScript
"use strict";
|
|
|
|
/**
|
|
* Adapter to use visual screen in browsers (in contrast to node)
|
|
* @constructor
|
|
*
|
|
* @param {BusConnector} bus
|
|
*/
|
|
function ScreenAdapter(screen_container, bus)
|
|
{
|
|
console.assert(screen_container, "1st argument must be a DOM container");
|
|
|
|
var
|
|
graphic_screen = screen_container.getElementsByTagName("canvas")[0],
|
|
graphic_context = graphic_screen.getContext("2d", { alpha: false }),
|
|
|
|
text_screen = screen_container.getElementsByTagName("div")[0],
|
|
cursor_element = document.createElement("div");
|
|
|
|
var
|
|
graphic_image_data,
|
|
graphic_buffer,
|
|
graphic_buffer32,
|
|
|
|
/** @type {number} */
|
|
cursor_row,
|
|
|
|
/** @type {number} */
|
|
cursor_col,
|
|
|
|
/** @type {number} */
|
|
scale_x = 1,
|
|
|
|
/** @type {number} */
|
|
scale_y = 1,
|
|
|
|
base_scale = 1,
|
|
|
|
graphical_mode_width,
|
|
graphical_mode_height,
|
|
|
|
modified_pixel_min = 0,
|
|
modified_pixel_max = 0,
|
|
|
|
changed_rows,
|
|
|
|
// are we in graphical mode now?
|
|
is_graphical = false,
|
|
|
|
// Index 0: ASCII code
|
|
// Index 1: Background color
|
|
// Index 2: Foreground color
|
|
text_mode_data,
|
|
|
|
// number of columns
|
|
text_mode_width,
|
|
|
|
// number of rows
|
|
text_mode_height;
|
|
|
|
var stopped = false;
|
|
|
|
var screen = this;
|
|
|
|
// 0x12345 -> "#012345"
|
|
function number_as_color(n)
|
|
{
|
|
n = n.toString(16);
|
|
|
|
return "#" + Array(7 - n.length).join("0") + n;
|
|
}
|
|
|
|
|
|
/**
|
|
* Charmaps that constraint unicode sequences for the default dospage
|
|
* @const
|
|
*/
|
|
var charmap_high = new Uint16Array([
|
|
0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
|
|
0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
|
|
0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
|
|
0xFF, 0xD6, 0xDC, 0xA2, 0xA3, 0xA5, 0x20A7, 0x192,
|
|
0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
|
|
0xBF, 0x2310, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
|
|
0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
|
|
0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
|
|
0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
|
|
0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
|
|
0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
|
|
0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
|
|
0x3B1, 0xDF, 0x393, 0x3C0, 0x3A3, 0x3C3, 0xB5, 0x3C4,
|
|
0x3A6, 0x398, 0x3A9, 0x3B4, 0x221E, 0x3C6, 0x3B5, 0x2229,
|
|
0x2261, 0xB1, 0x2265, 0x2264, 0x2320, 0x2321, 0xF7,
|
|
0x2248, 0xB0, 0x2219, 0xB7, 0x221A, 0x207F, 0xB2, 0x25A0, 0xA0
|
|
]);
|
|
|
|
/** @const */
|
|
var charmap_low = new Uint16Array([
|
|
0x20, 0x263A, 0x263B, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
|
|
0x25D8, 0x25CB, 0x25D9, 0x2642, 0x2640, 0x266A, 0x266B, 0x263C,
|
|
0x25BA, 0x25C4, 0x2195, 0x203C, 0xB6, 0xA7, 0x25AC, 0x21A8,
|
|
0x2191, 0x2193, 0x2192, 0x2190, 0x221F, 0x2194, 0x25B2, 0x25BC
|
|
]);
|
|
|
|
var charmap = [],
|
|
chr;
|
|
|
|
for(var i = 0; i < 256; i++)
|
|
{
|
|
if(i > 127)
|
|
{
|
|
chr = charmap_high[i - 0x80];
|
|
}
|
|
else if(i < 32)
|
|
{
|
|
chr = charmap_low[i];
|
|
}
|
|
else
|
|
{
|
|
chr = i;
|
|
}
|
|
|
|
charmap[i] = String.fromCharCode(chr);
|
|
}
|
|
|
|
graphic_context["imageSmoothingEnabled"] = false;
|
|
|
|
cursor_element.style.position = "absolute";
|
|
cursor_element.style.backgroundColor = "#ccc";
|
|
cursor_element.style.width = "7px";
|
|
cursor_element.style.display = "inline-block";
|
|
|
|
text_screen.style.display = "block";
|
|
graphic_screen.style.display = "none";
|
|
|
|
this.bus = bus;
|
|
|
|
bus.register("screen-set-mode", function(data)
|
|
{
|
|
this.set_mode(data);
|
|
}, this);
|
|
|
|
bus.register("screen-fill-buffer-end", function(data)
|
|
{
|
|
this.update_buffer(data);
|
|
}, this);
|
|
|
|
bus.register("screen-put-char", function(data)
|
|
{
|
|
//console.log(data);
|
|
this.put_char(data[0], data[1], data[2], data[3], data[4]);
|
|
}, this);
|
|
|
|
bus.register("screen-update-cursor", function(data)
|
|
{
|
|
this.update_cursor(data[0], data[1]);
|
|
}, this);
|
|
bus.register("screen-update-cursor-scanline", function(data)
|
|
{
|
|
this.update_cursor_scanline(data[0], data[1]);
|
|
}, this);
|
|
|
|
bus.register("screen-clear", function()
|
|
{
|
|
this.clear_screen();
|
|
}, this);
|
|
|
|
bus.register("screen-set-size-text", function(data)
|
|
{
|
|
this.set_size_text(data[0], data[1]);
|
|
}, this);
|
|
bus.register("screen-set-size-graphical", function(data)
|
|
{
|
|
this.set_size_graphical(data[0], data[1], data[2], data[3]);
|
|
}, this);
|
|
|
|
|
|
this.init = function()
|
|
{
|
|
// not necessary, because this gets initialized by the bios early,
|
|
// but nicer to look at
|
|
this.set_size_text(80, 25);
|
|
|
|
this.timer();
|
|
};
|
|
|
|
this.make_screenshot = function()
|
|
{
|
|
try {
|
|
const image = new Image();
|
|
image.src = graphic_screen.toDataURL("image/png");
|
|
const w = window.open("");
|
|
w.document.write(image.outerHTML);
|
|
}
|
|
catch(e) {}
|
|
};
|
|
|
|
this.put_char = function(row, col, chr, bg_color, fg_color)
|
|
{
|
|
if(row < text_mode_height && col < text_mode_width)
|
|
{
|
|
var p = 3 * (row * text_mode_width + col);
|
|
|
|
text_mode_data[p] = chr;
|
|
text_mode_data[p + 1] = bg_color;
|
|
text_mode_data[p + 2] = fg_color;
|
|
|
|
changed_rows[row] = 1;
|
|
}
|
|
};
|
|
|
|
this.timer = function()
|
|
{
|
|
if(!stopped)
|
|
{
|
|
requestAnimationFrame(is_graphical ? update_graphical : update_text);
|
|
}
|
|
};
|
|
|
|
var update_text = function()
|
|
{
|
|
for(var i = 0; i < text_mode_height; i++)
|
|
{
|
|
if(changed_rows[i])
|
|
{
|
|
screen.text_update_row(i);
|
|
changed_rows[i] = 0;
|
|
}
|
|
}
|
|
|
|
this.timer();
|
|
}.bind(this);
|
|
|
|
var update_graphical = function()
|
|
{
|
|
this.bus.send("screen-fill-buffer");
|
|
this.timer();
|
|
}.bind(this);
|
|
|
|
this.destroy = function()
|
|
{
|
|
stopped = true;
|
|
};
|
|
|
|
this.set_mode = function(graphical)
|
|
{
|
|
is_graphical = graphical;
|
|
|
|
if(graphical)
|
|
{
|
|
text_screen.style.display = "none";
|
|
graphic_screen.style.display = "block";
|
|
}
|
|
else
|
|
{
|
|
text_screen.style.display = "block";
|
|
graphic_screen.style.display = "none";
|
|
}
|
|
};
|
|
|
|
this.clear_screen = function()
|
|
{
|
|
graphic_context.fillStyle = "#000";
|
|
graphic_context.fillRect(0, 0, graphic_screen.width, graphic_screen.height);
|
|
};
|
|
|
|
/**
|
|
* @param {number} cols
|
|
* @param {number} rows
|
|
*/
|
|
this.set_size_text = function(cols, rows)
|
|
{
|
|
if(cols === text_mode_width && rows === text_mode_height)
|
|
{
|
|
return;
|
|
}
|
|
|
|
changed_rows = new Int8Array(rows);
|
|
text_mode_data = new Int32Array(cols * rows * 3);
|
|
|
|
text_mode_width = cols;
|
|
text_mode_height = rows;
|
|
|
|
while(text_screen.childNodes.length > rows)
|
|
{
|
|
text_screen.removeChild(text_screen.firstChild);
|
|
}
|
|
|
|
while(text_screen.childNodes.length < rows)
|
|
{
|
|
text_screen.appendChild(document.createElement("div"));
|
|
}
|
|
|
|
for(var i = 0; i < rows; i++)
|
|
{
|
|
this.text_update_row(i);
|
|
}
|
|
|
|
update_scale_text();
|
|
};
|
|
|
|
this.set_size_graphical = function(width, height, buffer_width, buffer_height)
|
|
{
|
|
if(DEBUG_SCREEN_LAYERS)
|
|
{
|
|
// Draw the entire buffer. Useful for debugging
|
|
// panning / page flipping / screen splitting code for both
|
|
// v86 developers and os developers
|
|
width = buffer_width;
|
|
height = buffer_height;
|
|
}
|
|
|
|
graphic_screen.style.display = "block";
|
|
|
|
graphic_screen.width = width;
|
|
graphic_screen.height = height;
|
|
|
|
//graphic_screen.style.width = width * scale_x + "px";
|
|
//graphic_screen.style.height = height * scale_y + "px";
|
|
|
|
// Make sure to call this here, because pixels are transparent otherwise
|
|
//screen.clear_screen();
|
|
|
|
graphic_image_data = graphic_context.createImageData(buffer_width, buffer_height);
|
|
graphic_buffer = new Uint8Array(graphic_image_data.data.buffer);
|
|
graphic_buffer32 = new Int32Array(graphic_image_data.data.buffer);
|
|
|
|
graphical_mode_width = width;
|
|
graphical_mode_height = height;
|
|
|
|
// add some scaling to tiny resolutions
|
|
if(graphical_mode_width <= 640)
|
|
{
|
|
base_scale = 2;
|
|
}
|
|
else
|
|
{
|
|
base_scale = 1;
|
|
}
|
|
|
|
this.bus.send("screen-tell-buffer", [graphic_buffer32], [graphic_buffer32.buffer]);
|
|
update_scale_graphic();
|
|
};
|
|
|
|
this.set_scale = function(s_x, s_y)
|
|
{
|
|
scale_x = s_x;
|
|
scale_y = s_y;
|
|
|
|
update_scale_text();
|
|
update_scale_graphic();
|
|
};
|
|
this.set_scale(scale_x, scale_y);
|
|
|
|
function update_scale_text()
|
|
{
|
|
elem_set_scale(text_screen, scale_x, scale_y, true);
|
|
}
|
|
|
|
function update_scale_graphic()
|
|
{
|
|
elem_set_scale(graphic_screen, scale_x * base_scale, scale_y * base_scale, false);
|
|
}
|
|
|
|
function elem_set_scale(elem, scale_x, scale_y, use_scale)
|
|
{
|
|
elem.style.width = "";
|
|
elem.style.height = "";
|
|
|
|
if(use_scale)
|
|
{
|
|
elem.style.transform = "";
|
|
}
|
|
|
|
var rectangle = elem.getBoundingClientRect();
|
|
|
|
if(use_scale)
|
|
{
|
|
var scale_str = "";
|
|
|
|
scale_str += scale_x === 1 ? "" : " scaleX(" + scale_x + ")";
|
|
scale_str += scale_y === 1 ? "" : " scaleY(" + scale_y + ")";
|
|
|
|
elem.style.transform = scale_str;
|
|
}
|
|
else
|
|
{
|
|
// unblur non-fractional scales
|
|
if(scale_x % 1 === 0 && scale_y % 1 === 0)
|
|
{
|
|
graphic_screen.style["imageRendering"] = "crisp-edges"; // firefox
|
|
graphic_screen.style["imageRendering"] = "pixelated";
|
|
graphic_screen.style["-ms-interpolation-mode"] = "nearest-neighbor";
|
|
}
|
|
else
|
|
{
|
|
graphic_screen.style.imageRendering = "";
|
|
graphic_screen.style["-ms-interpolation-mode"] = "";
|
|
}
|
|
|
|
// undo fractional css-to-device pixel ratios
|
|
var device_pixel_ratio = window.devicePixelRatio || 1;
|
|
if(device_pixel_ratio % 1 !== 0)
|
|
{
|
|
scale_x /= device_pixel_ratio;
|
|
scale_y /= device_pixel_ratio;
|
|
}
|
|
}
|
|
|
|
if(scale_x !== 1)
|
|
{
|
|
elem.style.width = rectangle.width * scale_x + "px";
|
|
}
|
|
if(scale_y !== 1)
|
|
{
|
|
elem.style.height = rectangle.height * scale_y + "px";
|
|
}
|
|
}
|
|
|
|
this.update_cursor_scanline = function(start, end)
|
|
{
|
|
if(start & 0x20)
|
|
{
|
|
cursor_element.style.display = "none";
|
|
}
|
|
else
|
|
{
|
|
cursor_element.style.display = "inline";
|
|
|
|
cursor_element.style.height = Math.min(15, end - start) + "px";
|
|
cursor_element.style.marginTop = Math.min(15, start) + "px";
|
|
}
|
|
};
|
|
|
|
this.update_cursor = function(row, col)
|
|
{
|
|
if(row !== cursor_row || col !== cursor_col)
|
|
{
|
|
changed_rows[row] = 1;
|
|
changed_rows[cursor_row] = 1;
|
|
|
|
cursor_row = row;
|
|
cursor_col = col;
|
|
}
|
|
};
|
|
|
|
this.text_update_row = function(row)
|
|
{
|
|
var offset = 3 * row * text_mode_width,
|
|
row_element,
|
|
color_element,
|
|
fragment;
|
|
|
|
var bg_color,
|
|
fg_color,
|
|
text;
|
|
|
|
row_element = text_screen.childNodes[row];
|
|
fragment = document.createElement("div");
|
|
|
|
for(var i = 0; i < text_mode_width; )
|
|
{
|
|
color_element = document.createElement("span");
|
|
|
|
bg_color = text_mode_data[offset + 1];
|
|
fg_color = text_mode_data[offset + 2];
|
|
|
|
color_element.style.backgroundColor = number_as_color(bg_color);
|
|
color_element.style.color = number_as_color(fg_color);
|
|
|
|
text = "";
|
|
|
|
// put characters of the same color in one element
|
|
while(i < text_mode_width &&
|
|
text_mode_data[offset + 1] === bg_color &&
|
|
text_mode_data[offset + 2] === fg_color)
|
|
{
|
|
var ascii = text_mode_data[offset];
|
|
|
|
text += charmap[ascii];
|
|
|
|
i++;
|
|
offset += 3;
|
|
|
|
if(row === cursor_row)
|
|
{
|
|
if(i === cursor_col)
|
|
{
|
|
// next row will be cursor
|
|
// create new element
|
|
break;
|
|
}
|
|
else if(i === cursor_col + 1)
|
|
{
|
|
// found the cursor
|
|
fragment.appendChild(cursor_element);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
color_element.textContent = text;
|
|
fragment.appendChild(color_element);
|
|
}
|
|
|
|
row_element.parentNode.replaceChild(fragment, row_element);
|
|
};
|
|
|
|
this.update_buffer = function(layers)
|
|
{
|
|
if(DEBUG_SCREEN_LAYERS)
|
|
{
|
|
// Draw the entire buffer. Useful for debugging
|
|
// panning / page flipping / screen splitting code for both
|
|
// v86 developers and os developers
|
|
graphic_context.putImageData(
|
|
graphic_image_data,
|
|
0, 0
|
|
);
|
|
|
|
// For each visible layer that would've been drawn, draw a
|
|
// rectangle to visualise the layer instead.
|
|
graphic_context.strokeStyle = "#0F0";
|
|
graphic_context.lineWidth = 4;
|
|
layers.forEach((layer) =>
|
|
{
|
|
graphic_context.strokeRect(
|
|
layer.buffer_x,
|
|
layer.buffer_y,
|
|
layer.buffer_width,
|
|
layer.buffer_height
|
|
);
|
|
});
|
|
graphic_context.lineWidth = 1;
|
|
return;
|
|
}
|
|
|
|
layers.forEach((layer) =>
|
|
{
|
|
graphic_context.putImageData(
|
|
graphic_image_data,
|
|
layer.screen_x - layer.buffer_x,
|
|
layer.screen_y - layer.buffer_y,
|
|
layer.buffer_x,
|
|
layer.buffer_y,
|
|
layer.buffer_width,
|
|
layer.buffer_height
|
|
);
|
|
});
|
|
};
|
|
|
|
this.init();
|
|
}
|