1133 lines
38 KiB
JavaScript
1133 lines
38 KiB
JavaScript
/* Copyright 2010-2017 Will Scullin <scullin@scullinsteel.com>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation. No representations are made about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*/
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/*globals allocMemPages: false, debug: false,
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base64_encode: false, base64_decode: false,
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enhanced: false */
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/*exported LoresPage, HiresPage, VideoModes, scanlines, multiScreen */
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var multiScreen = false;
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var textMode = true;
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var mixedMode = false;
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var hiresMode = false;
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var pageMode = 1;
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var _80colMode = false;
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var altCharMode = false;
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var doubleHiresMode = false;
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var monoDHRMode = false;
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var colorDHRMode = false;
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var mixedDHRMode = false;
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var highColorHGRMode = false;
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var highColorTextMode = false;
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var scanlines = false;
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function dim(c) {
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return [
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c[0] * 0.75 & 0xff,
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c[1] * 0.75 & 0xff,
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c[2] * 0.75 & 0xff
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];
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}
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// hires colors
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var orangeCol = [0xff, 0x65, 0x00];
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var greenCol = [0x00, 0xff, 0x00];
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var blueCol = [0x09, 0x2a, 0xff];
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var violetCol = [0xc9, 0x39, 0xc7];
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var whiteCol = [0xff, 0xff, 0xff];
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var blackCol = [0x00, 0x00, 0x00];
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/****************************************************************************
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*
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* Text/Lores Graphics
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*
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***************************************************************************/
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function LoresPage(page, charset, e, context)
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{
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'use strict';
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// $00-$3F inverse
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// $40-$7F flashing
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// $80-$FF normal
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var _page = page;
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var _imageData;
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var _buffer = [];
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var _refreshing = false;
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var _greenMode = false;
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var _blink = false;
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var _dirty = {
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top: 385,
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bottom: -1,
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left: 561,
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right: -1
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};
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var _green = [0x00,0xff,0x80];
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var _colors = [
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[0x00,0x00,0x00], // black
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[0xdd,0x00,0x33], // 0x1 deep red
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[0x00,0x00,0x99], // 0x2 dark blue
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[0xdd,0x00,0xdd], // 0x3 purple
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[0x00,0x77,0x00], // 0x4 dark green
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[0x55,0x55,0x55], // 0x5 dark gray
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[0x23,0x22,0xff], // 0x6 medium blue
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[0x66,0xaa,0xff], // 0x7 light blue
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[0x88,0x55,0x22], // 0x8 brown
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[0xff,0x66,0x00], // 0x9 orange
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[0xaa,0xaa,0xaa], // 0xa light gray
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[0xff,0x99,0x88], // 0xb pink
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[0x00,0xdd,0x00], // 0xc green
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[0xff,0xff,0x00], // 0xd yellow
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[0x00,0xff,0x99], // 0xe aquamarine
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[0xff,0xff,0xff] // 0xf white
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];
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function _init() {
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var idx;
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_imageData = context.createImageData(560, 384);
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for (idx = 0; idx < 560 * 384 * 4; idx++) {
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_imageData.data[idx] = 0xff;
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}
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_buffer[0] = allocMemPages(0x4);
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_buffer[1] = allocMemPages(0x4);
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}
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function _drawPixel(data, off, color) {
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var c0 = color[0], c1 = color[1], c2 = color[2];
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data[off + 0] = data[off + 4] = c0;
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data[off + 1] = data[off + 5] = c1;
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data[off + 2] = data[off + 6] = c2;
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if (!scanlines) {
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data[off + 560 * 4] = data[off + 560 * 4 + 4] = c0;
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data[off + 560 * 4 + 1] = data[off + 560 * 4 + 5] = c1;
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data[off + 560 * 4 + 2] = data[off + 560 * 4 + 6] = c2;
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} else {
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data[off + 560 * 4] = data[off + 560 * 4 + 4] = c0 >> 1;
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data[off + 560 * 4 + 1] = data[off + 560 * 4 + 5] = c1 >> 1;
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data[off + 560 * 4 + 2] = data[off + 560 * 4 + 6] = c2 >> 1;
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}
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}
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function _drawHalfPixel(data, off, color) {
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var c0 = color[0], c1 = color[1], c2 = color[2];
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data[off + 0] = c0;
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data[off + 1] = c1;
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data[off + 2] = c2;
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if (!scanlines) {
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data[off + 560 * 4] = c0;
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data[off + 560 * 4 + 1] = c1;
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data[off + 560 * 4 + 2] = c2;
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} else {
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data[off + 560 * 4] = c0 >> 1;
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data[off + 560 * 4 + 1] = c1 >> 1;
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data[off + 560 * 4 + 2] = c2 >> 1;
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}
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}
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_init();
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return {
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bank0: function() {
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var self = this;
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return {
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start: function() {
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return self._start();
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},
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end: function() {
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return self._end();
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},
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read: function(page, off) {
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return self._read(page, off, 0);
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},
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write: function(page, off, val) {
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return self._write(page, off, val, 0);
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}
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};
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},
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bank1: function() {
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var self = this;
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return {
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start: function() {
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return self._start();
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},
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end: function() {
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return self._end();
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},
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read: function(page, off) {
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return self._read(page, off, 1);
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},
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write: function(page, off, val) {
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return self._write(page, off, val, 1);
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}
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};
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},
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// These are used by both bank 0 and 1
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_start: function() {
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return (0x04 * _page);
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},
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_end: function() { return (0x04 * _page) + 0x03; },
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_read: function(page, off, bank) {
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var addr = (page << 8) | off,
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base = addr - 0x400 * _page;
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return _buffer[bank][base];
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},
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_write: function(page, off, val, bank) {
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var addr = (page << 8) | off,
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base = addr - 0x400 * _page,
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fore, back;
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if (_buffer[bank][base] == val && !_refreshing) {
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return;
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}
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_buffer[bank][base] = val;
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var col = (base % 0x80) % 0x28,
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adj = off - col;
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// 000001cd eabab000 -> 000abcde
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var ab = (adj & 0x18),
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cd = (page & 0x03) << 1,
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ee = adj >> 7;
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var idx, jdx;
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var row = ab | cd | ee;
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var b;
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var data = _imageData.data;
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if ((row < 24) && (col < 40)) {
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var y = row * 16;
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if (y < _dirty.top) { _dirty.top = y; }
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y += 16;
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if (y > _dirty.bottom) { _dirty.bottom = y; }
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var x = col * 14;
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if (x < _dirty.left) { _dirty.left = x; }
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x += 14;
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if (x > _dirty.right) { _dirty.right = x; }
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var color;
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if (textMode || hiresMode || (mixedMode && row > 19)) {
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var inverse;
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if (e) {
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if (!_80colMode && !altCharMode) {
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inverse = ((val & 0xc0) == 0x40) && _blink;
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}
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} else {
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inverse = !((val & 0x80) || (val & 0x40) && _blink);
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}
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fore = inverse ? blackCol : (_greenMode ? _green : whiteCol);
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back = inverse ? (_greenMode ? _green : whiteCol) : blackCol;
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if (_80colMode) {
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if (!enhanced) {
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val = (val >= 0x40 && val < 0x60) ? val - 0x40 : val;
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} else if (!altCharMode) {
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val = (val >= 0x40 && val < 0x80) ? val - 0x40 : val;
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}
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off = (col * 14 + (bank ? 0 : 1) * 7 + row * 560 * 8 * 2) * 4;
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for (jdx = 0; jdx < 8; jdx++) {
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b = charset[val * 8 + jdx];
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for (idx = 0; idx < 7; idx++) {
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color = (b & 0x01) ? back : fore;
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_drawHalfPixel(data, off, color);
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b >>= 1;
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off += 4;
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}
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off += 553 * 4 + 560 * 4;
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}
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} else {
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val = _buffer[0][base];
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if (!enhanced) {
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val = (val >= 0x40 && val < 0x60) ? val - 0x40 : val;
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} else if (!altCharMode) {
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val = (val >= 0x40 && val < 0x80) ? val - 0x40 : val;
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}
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off = (col * 14 + row * 560 * 8 * 2) * 4;
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if (highColorTextMode) {
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fore = _colors[_buffer[1][base] >> 4];
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back = _colors[_buffer[1][base] & 0x0f];
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}
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if (e) {
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for (jdx = 0; jdx < 8; jdx++) {
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b = charset[val * 8 + jdx];
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for (idx = 0; idx < 7; idx++) {
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color = (b & 0x01) ? back : fore;
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_drawPixel(data, off, color);
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b >>= 1;
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off += 8;
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}
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off += 546 * 4 + 560 * 4;
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}
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} else {
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var colorMode = mixedMode && !textMode && !_greenMode;
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// var val0 = col > 0 ? _buffer[0][base - 1] : 0;
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// var val2 = col < 39 ? _buffer[0][base + 1] : 0;
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for (jdx = 0; jdx < 8; jdx++) {
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var odd = !(col & 0x1);
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b = charset[val * 8 + jdx] << 1;
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if (colorMode) {
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// var b0 = charset[val0 * 8 + jdx];
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// var b2 = charset[val2 * 8 + jdx];
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if (inverse) { b ^= 0x1ff; }
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}
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for (idx = 0; idx < 7; idx++) {
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if (colorMode) {
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if (b & 0x80) {
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if ((b & 0x1c0) != 0x80) {
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color = whiteCol;
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} else {
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color = odd ? violetCol : greenCol;
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}
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} else {
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color = blackCol;
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}
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odd = !odd;
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} else {
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color = (b & 0x80) ? fore : back;
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}
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_drawPixel(data, off, color);
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b <<= 1;
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off += 8;
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}
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off += 546 * 4 + 560 * 4;
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}
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}
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}
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} else {
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if (_80colMode) {
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off = (col * 14 + (bank ? 0 : 1) * 7 + row * 560 * 8 * 2) * 4;
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if (_greenMode) {
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fore = _green;
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back = blackCol;
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for (jdx = 0; jdx < 8; jdx++) {
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b = (jdx < 8) ? (val & 0x0f) : (val >> 4);
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b |= (b << 4);
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if (bank & 0x1) {
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b <<= 1;
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}
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for (idx = 0; idx < 7; idx++) {
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color = (b & 0x80) ? fore : back;
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_drawHalfPixel(data, off, color);
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b <<= 1;
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off += 4;
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}
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off += 553 * 4 + 560 * 4;
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}
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} else {
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if (bank & 0x1) {
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val = ((val & 0x77) << 1) | ((val & 0x88) >> 3);
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}
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for (jdx = 0; jdx < 8; jdx++) {
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color = _colors[(jdx < 4) ?
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(val & 0x0f) : (val >> 4)];
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for (idx = 0; idx < 7; idx++) {
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_drawHalfPixel(data, off, color);
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off += 4;
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}
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off += 553 * 4 + 560 * 4;
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}
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}
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} else {
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off = (col * 14 + row * 560 * 8 * 2) * 4;
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if (_greenMode) {
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fore = _green;
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back = blackCol;
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for (jdx = 0; jdx < 8; jdx++) {
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b = (jdx < 4) ? (val & 0x0f) : (val >> 4);
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b |= (b << 4);
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b |= (b << 8);
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if (col & 0x1) {
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b <<= 2;
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}
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for (idx = 0; idx < 14; idx++) {
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color = (b & 0x8000) ? fore : back;
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_drawHalfPixel(data, off, color);
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b <<= 1;
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off += 4;
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}
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off += 546 * 4 + 560 * 4;
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}
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} else {
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for (jdx = 0; jdx < 8; jdx++) {
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color = _colors[(jdx < 4) ? (val & 0x0f) : (val >> 4)];
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for (idx = 0; idx < 7; idx++) {
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_drawPixel(data, off, color);
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off += 8;
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}
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off += 546 * 4 + 560 * 4;
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}
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}
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}
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}
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}
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},
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refresh: function() {
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var addr = 0x400 * _page;
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_refreshing = true;
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for (var idx = 0; idx < 0x400; idx++, addr++) {
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this._write(addr >> 8, addr & 0xff, _buffer[0][idx], 0);
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if (_80colMode) {
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this._write(addr >> 8, addr & 0xff, _buffer[1][idx], 1);
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}
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}
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_refreshing = false;
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},
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blink: function() {
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var addr = 0x400 * _page;
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_refreshing = true;
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_blink = !_blink;
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for (var idx = 0; idx < 0x400; idx++, addr++) {
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var b = _buffer[0][idx];
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if ((b & 0xC0) == 0x40) {
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this._write(addr >> 8, addr & 0xff, _buffer[0][idx], 0);
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}
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}
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_refreshing = false;
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},
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green: function(on) {
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_greenMode = on;
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this.refresh();
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},
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blit: function(mixed) {
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if (_dirty.top === 385) { return false; }
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var top = _dirty.top;
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var bottom = _dirty.bottom;
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var left = _dirty.left;
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var right = _dirty.right;
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if (mixed) {
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if (bottom < 320) { return false; }
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if (top < 320) { top = 320; }
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}
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context.putImageData(
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_imageData, 0, 0, left, top, right - left, bottom - top
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);
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_dirty = {
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top: 385,
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bottom: -1,
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left: 561,
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right: -1
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};
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return true;
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},
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start: function() {
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var self = this;
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setInterval(function() {
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self.blink();
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}, 267);
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return this._start();
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},
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end: function() {
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return this._end();
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},
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read: function(page, off) {
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return this._read(page, off, 0);
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},
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write: function(page, off, val) {
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return this._write(page, off, val, 0);
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},
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getState: function() {
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return {
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page: _page,
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green: _greenMode,
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buffer: [
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base64_encode(_buffer[0]),
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base64_encode(_buffer[1])
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]
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};
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},
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setState: function(state) {
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_page = state.page;
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_greenMode = state.green;
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_buffer[0] = base64_decode(state.buffer[0]);
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_buffer[1] = base64_decode(state.buffer[1]);
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this.refresh();
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}
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};
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}
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/****************************************************************************
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*
|
|
* Hires Graphics
|
|
*
|
|
***************************************************************************/
|
|
|
|
function HiresPage(page, context)
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{
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'use strict';
|
|
|
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var _page = page;
|
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var _imageData;
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var _dirty = {
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top: 385,
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bottom: -1,
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left: 561,
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right: -1
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};
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|
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var r4 = [
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0, // Black
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2, // Dark Blue
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4, // Dark Green
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6, // Medium Blue
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8, // Brown
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5, // Gray 1
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12, // Light Green
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14, // Aqua
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1, // Red
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3, // Purple
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10, // Gray 2
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7, // Pink
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9, // Orange
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11, // Light Blue
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13, // Yellow
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15 // White
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];
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|
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var dcolors = [
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[0x00,0x00,0x00], // black
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[0xdd,0x00,0x33], // 0x1 deep red
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[0x00,0x00,0x99], // 0x2 dark blue
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[0xdd,0x00,0xdd], // 0x3 purple
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[0x00,0x77,0x00], // 0x4 dark green
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[0x55,0x55,0x55], // 0x5 dark gray
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[0x23,0x22,0xff], // 0x6 medium blue
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[0x66,0xaa,0xff], // 0x7 light blue
|
|
[0x88,0x55,0x22], // 0x8 brown
|
|
[0xff,0x66,0x00], // 0x9 orange
|
|
[0xaa,0xaa,0xaa], // 0xa light gray
|
|
[0xff,0x99,0x88], // 0xb pink
|
|
[0x00,0xdd,0x00], // 0xc green
|
|
[0xff,0xff,0x00], // 0xd yellow
|
|
[0x00,0xff,0x99], // 0xe aquamarine
|
|
[0xff,0xff,0xff] // 0xf white
|
|
];
|
|
|
|
var _buffer = [];
|
|
var _refreshing = false;
|
|
|
|
var _greenMode = false;
|
|
var _green = [0x00, 0xff, 0x80];
|
|
|
|
function _init() {
|
|
var idx;
|
|
_imageData = context.createImageData(560, 384);
|
|
for (idx = 0; idx < 560 * 384 * 4; idx++) {
|
|
_imageData.data[idx] = 0xff;
|
|
}
|
|
_buffer[0] = allocMemPages(0x20);
|
|
_buffer[1] = allocMemPages(0x20);
|
|
}
|
|
|
|
function _drawPixel(data, off, color) {
|
|
var c0 = color[0], c1 = color[1], c2 = color[2];
|
|
|
|
data[off + 0] = data[off + 4] = c0;
|
|
data[off + 1] = data[off + 5] = c1;
|
|
data[off + 2] = data[off + 6] = c2;
|
|
if (!scanlines) {
|
|
data[off + 560 * 4] = data[off + 560 * 4 + 4] = c0;
|
|
data[off + 560 * 4 + 1] = data[off + 560 * 4 + 5] = c1;
|
|
data[off + 560 * 4 + 2] = data[off + 560 * 4 + 6] = c2;
|
|
} else {
|
|
data[off + 560 * 4] = data[off + 560 * 4 + 4] = c0 >> 1;
|
|
data[off + 560 * 4 + 1] = data[off + 560 * 4 + 5] = c1 >> 1;
|
|
data[off + 560 * 4 + 2] = data[off + 560 * 4 + 6] = c2 >> 1;
|
|
}
|
|
}
|
|
|
|
function _drawHalfPixel(data, off, color) {
|
|
var c0 = color[0], c1 = color[1], c2 = color[2];
|
|
data[off + 0] = c0;
|
|
data[off + 1] = c1;
|
|
data[off + 2] = c2;
|
|
if (!scanlines) {
|
|
data[off + 560 * 4] = c0;
|
|
data[off + 560 * 4 + 1] = c1;
|
|
data[off + 560 * 4 + 2] = c2;
|
|
} else {
|
|
data[off + 560 * 4] = c0 >> 1;
|
|
data[off + 560 * 4 + 1] = c1 >> 1;
|
|
data[off + 560 * 4 + 2] = c2 >> 1;
|
|
}
|
|
}
|
|
|
|
_init();
|
|
|
|
return {
|
|
bank0: function() {
|
|
var self = this;
|
|
return {
|
|
start: function() {
|
|
return self._start();
|
|
},
|
|
end: function() {
|
|
return self._end();
|
|
},
|
|
read: function(page, off) {
|
|
return self._read(page, off, 0);
|
|
},
|
|
write: function(page, off, val) {
|
|
return self._write(page, off, val, 0);
|
|
}
|
|
};
|
|
},
|
|
|
|
bank1: function() {
|
|
var self = this;
|
|
return {
|
|
start: function() {
|
|
return self._start();
|
|
},
|
|
end: function() {
|
|
return self._end();
|
|
},
|
|
read: function(page, off) {
|
|
return self._read(page, off, 1);
|
|
},
|
|
write: function(page, off, val) {
|
|
return self._write(page, off, val, 1);
|
|
}
|
|
};
|
|
},
|
|
|
|
_start: function() { return (0x20 * _page); },
|
|
|
|
_end: function() { return (0x020 * _page) + 0x1f; },
|
|
|
|
_read: function(page, off, bank) {
|
|
var addr = (page << 8) | off, base = addr - 0x2000 * _page;
|
|
return _buffer[bank][base];
|
|
},
|
|
|
|
_write: function(page, off, val, bank) {
|
|
var addr = (page << 8) | off, base = addr - 0x2000 * _page,
|
|
idx, jdx;
|
|
|
|
if (addr < (0x2000 * _page) || addr >= (0x2000 * _page + 0x2000)) {
|
|
return;
|
|
}
|
|
|
|
if (_buffer[bank][base] == val && !_refreshing) {
|
|
return;
|
|
}
|
|
_buffer[bank][base] = val;
|
|
|
|
var hbs = val & 0x80;
|
|
val &= 0x7f;
|
|
|
|
var col = (base % 0x80) % 0x28,
|
|
adj = off - col;
|
|
|
|
// 000001cd eabab000 -> 000abcde
|
|
var ab = (adj & 0x18),
|
|
cd = (page & 0x03) << 1,
|
|
e = adj >> 7;
|
|
|
|
var rowa = ab | cd | e,
|
|
rowb = base >> 10;
|
|
|
|
var dx, dy, data = _imageData.data;
|
|
if ((rowa < 24) && (col < 40)) {
|
|
if (!multiScreen && !hiresMode) {
|
|
return;
|
|
}
|
|
|
|
var y = rowa * 16 + rowb * 2;
|
|
if (y < _dirty.top) { _dirty.top = y; }
|
|
y += 2;
|
|
if (y > _dirty.bottom) { _dirty.bottom = y; }
|
|
var x = col * 14;
|
|
if (x < _dirty.left) { _dirty.left = x; }
|
|
x += 14;
|
|
if (x > _dirty.right) { _dirty.right = x; }
|
|
|
|
dy = rowa * 16 + rowb * 2;
|
|
var bz, b0, b1, b2, b3, b4, c, hb;
|
|
if (doubleHiresMode) {
|
|
// Every 4 bytes is 7 pixels
|
|
// 2 bytes per bank
|
|
|
|
// b0 b1 b2 b3
|
|
// c0 c1 c2 c3 c4 c5 c6
|
|
// 76543210 76543210 76543210 76543210
|
|
// 1111222 2333344 4455556 6667777
|
|
|
|
var mod = col % 2, mcol = col - mod;
|
|
bz = _buffer[0][base - mod - 1];
|
|
b0 = _buffer[1][base - mod];
|
|
b1 = _buffer[0][base - mod];
|
|
b2 = _buffer[1][base - mod + 1];
|
|
b3 = _buffer[0][base - mod + 1];
|
|
b4 = _buffer[1][base - mod + 2];
|
|
c = [
|
|
0,
|
|
((b0 & 0x0f) >> 0), // 0
|
|
((b0 & 0x70) >> 4) | ((b1 & 0x01) << 3), // 1
|
|
((b1 & 0x1e) >> 1), // 2
|
|
((b1 & 0x60) >> 5) | ((b2 & 0x03) << 2), // 3
|
|
((b2 & 0x3c) >> 2), // 4
|
|
((b2 & 0x40) >> 6) | ((b3 & 0x07) << 1), // 5
|
|
((b3 & 0x78) >> 3), // 6
|
|
0
|
|
], // 7
|
|
hb = [
|
|
0,
|
|
b0 & 0x80, // 0
|
|
b0 & 0x80, // 1
|
|
b1 & 0x80, // 2
|
|
b2 & 0x80, // 3
|
|
b2 & 0x80, // 4
|
|
b3 & 0x80, // 5
|
|
b3 & 0x80, // 6
|
|
0
|
|
]; // 7
|
|
if (col > 0) {
|
|
c[0] = (bz & 0x78) >> 3;
|
|
hb[0] = bz & 0x80;
|
|
}
|
|
if (col < 39) {
|
|
c[8] = b4 & 0x0f;
|
|
hb[8] = b4 & 0x80;
|
|
}
|
|
dx = mcol * 14;
|
|
off = dx * 4 + dy * 280 * 4 * 2;
|
|
|
|
var monoColor = null;
|
|
if (_greenMode) {
|
|
monoColor = _green;
|
|
} else if (monoDHRMode) {
|
|
monoColor = whiteCol;
|
|
}
|
|
|
|
for (idx = 1; idx < 8; idx++) {
|
|
hbs = hb[idx];
|
|
var dcolor = dcolors[r4[c[idx]]];
|
|
var bits = c[idx-1] | (c[idx] << 4) | (c[idx+1] << 8);
|
|
for (jdx = 0; jdx < 4; jdx++, off += 4) {
|
|
if (monoColor) {
|
|
if (bits & 0x10) {
|
|
_drawHalfPixel(data, off, monoColor);
|
|
} else {
|
|
_drawHalfPixel(data, off, blackCol);
|
|
}
|
|
} else if (mixedDHRMode) {
|
|
if (hbs) {
|
|
_drawHalfPixel(data, off, dcolor);
|
|
} else {
|
|
if (bits & 0x10) {
|
|
_drawHalfPixel(data, off, whiteCol);
|
|
} else {
|
|
_drawHalfPixel(data, off, blackCol);
|
|
}
|
|
}
|
|
} else if (colorDHRMode) {
|
|
_drawHalfPixel(data, off, dcolor);
|
|
} else if (
|
|
((c[idx] != c[idx - 1]) && (c[idx] != c[idx + 1])) &&
|
|
(((bits & 0x1c) == 0x1c) ||
|
|
((bits & 0x70) == 0x70) ||
|
|
((bits & 0x38) == 0x38))
|
|
) {
|
|
_drawHalfPixel(data, off, whiteCol);
|
|
} else if (
|
|
(bits & 0x38) ||
|
|
(c[idx] == c[idx + 1]) ||
|
|
(c[idx] == c[idx - 1])
|
|
) {
|
|
_drawHalfPixel(data, off, dcolor);
|
|
} else if (bits & 0x28) {
|
|
_drawHalfPixel(data, off, dim(dcolor));
|
|
} else {
|
|
_drawHalfPixel(data, off, blackCol);
|
|
}
|
|
bits >>= 1;
|
|
}
|
|
}
|
|
|
|
if (!_refreshing) {
|
|
_refreshing = true;
|
|
var bb = bank ? 0 : 1;
|
|
for (var rr = addr - 1; rr <= addr + 1; rr++) {
|
|
var vv = _buffer[bb][rr - 0x2000 * _page];
|
|
this._write(rr >> 8, rr & 0xff, vv, bb);
|
|
}
|
|
_refreshing = false;
|
|
}
|
|
} else {
|
|
val = _buffer[0][base] & 0x7f;
|
|
dx = col * 14 - 2;
|
|
b0 = col > 0 ? _buffer[0][base - 1] : 0;
|
|
b2 = col < 39 ? _buffer[0][base + 1] : 0;
|
|
val |= (b2 & 0x3) << 7;
|
|
var v0 = b0 & 0x20, v1 = b0 & 0x40, v2 = val & 0x1,
|
|
odd = !(col & 0x1),
|
|
color,
|
|
oddCol = (hbs ? orangeCol : greenCol),
|
|
evenCol = (hbs ? blueCol : violetCol);
|
|
|
|
off = dx * 4 + dy * 280 * 4 * 2;
|
|
|
|
monoColor = _greenMode ? _green : null;
|
|
|
|
for (idx = 0; idx < 9; idx++, off += 8) {
|
|
val >>= 1;
|
|
|
|
if (v1) {
|
|
if (monoColor) {
|
|
color = monoColor;
|
|
} else if (highColorHGRMode) {
|
|
color = dcolors[_buffer[1][base] >> 4];
|
|
} else if (v0 || v2) {
|
|
color = whiteCol;
|
|
} else {
|
|
color = odd ? oddCol : evenCol;
|
|
}
|
|
} else {
|
|
if (monoColor) {
|
|
color = blackCol;
|
|
} else if (highColorHGRMode) {
|
|
color = dcolors[_buffer[1][base] & 0x0f];
|
|
} else if (odd && v2 && v0) {
|
|
color = v0 ? dim(evenCol) : evenCol;
|
|
} else if (!odd && v0 && v2) {
|
|
color = v2 ? dim(oddCol) : oddCol;
|
|
} else {
|
|
color = blackCol;
|
|
}
|
|
}
|
|
|
|
if (dx > -1 && dx < 560) {
|
|
_drawPixel(data, off, color);
|
|
}
|
|
dx += 2;
|
|
|
|
v0 = v1;
|
|
v1 = v2;
|
|
v2 = val & 0x01;
|
|
odd = !odd;
|
|
}
|
|
}
|
|
}
|
|
},
|
|
refresh: function() {
|
|
var page, off, idx, addr = 0x2000 * _page;
|
|
_refreshing = true;
|
|
for (idx = 0; idx < 0x2000; idx++, addr++) {
|
|
page = addr >> 8;
|
|
off = addr & 0xff;
|
|
this._write(page, off, _buffer[0][idx], 0);
|
|
if (_80colMode) {
|
|
this._write(page, off, _buffer[1][idx], 1);
|
|
}
|
|
}
|
|
_refreshing = false;
|
|
},
|
|
green: function(on) {
|
|
_greenMode = on;
|
|
this.refresh();
|
|
},
|
|
blit: function(mixed) {
|
|
if (_dirty.top === 385) { return false; }
|
|
var top = _dirty.top;
|
|
var bottom = _dirty.bottom;
|
|
var left = _dirty.left;
|
|
var right = _dirty.right;
|
|
|
|
if (mixed) {
|
|
if (top > 320) { return false; }
|
|
if (bottom > 320) { bottom = 320; }
|
|
}
|
|
context.putImageData(
|
|
_imageData, 0, 0, left, top, right - left, bottom - top
|
|
);
|
|
_dirty = {
|
|
top: 385,
|
|
bottom: -1,
|
|
left: 561,
|
|
right: -1
|
|
};
|
|
return true;
|
|
},
|
|
start: function() {
|
|
return this._start();
|
|
},
|
|
end: function() {
|
|
return this._end();
|
|
},
|
|
read: function(page, off) {
|
|
return this._read(page, off, 0);
|
|
},
|
|
write: function(page, off, val) {
|
|
return this._write(page, off, val, 0);
|
|
},
|
|
getState: function() {
|
|
return {
|
|
page: _page,
|
|
green: _greenMode,
|
|
buffer: [
|
|
base64_encode(_buffer[0]),
|
|
base64_encode(_buffer[1])
|
|
]
|
|
};
|
|
},
|
|
setState: function(state) {
|
|
_page = state.page;
|
|
_greenMode = state.green;
|
|
_buffer[0] = base64_decode(state.buffer[0]);
|
|
_buffer[1] = base64_decode(state.buffer[1]);
|
|
|
|
this.refresh();
|
|
}
|
|
};
|
|
}
|
|
|
|
function VideoModes(gr, hgr, gr2, hgr2, e) {
|
|
var _grs = [gr, gr2];
|
|
var _hgrs = [hgr, hgr2];
|
|
var _seq = '';
|
|
|
|
function _refresh() {
|
|
gr.refresh();
|
|
gr2.refresh();
|
|
hgr.refresh();
|
|
hgr2.refresh();
|
|
}
|
|
|
|
return {
|
|
refresh: function() {
|
|
_refresh();
|
|
},
|
|
reset: function() {
|
|
textMode = true;
|
|
mixedMode = false;
|
|
hiresMode = true;
|
|
pageMode = 1;
|
|
|
|
_80colMode = false;
|
|
altCharMode = false;
|
|
|
|
doubleHiresMode = false;
|
|
monoDHRMode = false;
|
|
colorDHRMode = false;
|
|
mixedDHRMode = false;
|
|
highColorHGRMode = false;
|
|
highColorTextMode = false;
|
|
|
|
_refresh();
|
|
},
|
|
text: function(on) {
|
|
var old = textMode;
|
|
textMode = on;
|
|
|
|
highColorTextMode = false;
|
|
|
|
_seq = on ? 'T+' : 'T-';
|
|
// debug('_seq=', _seq);
|
|
|
|
if (old != on) {
|
|
_refresh();
|
|
}
|
|
},
|
|
_80col: function(on) {
|
|
if (!e) { return; }
|
|
var old = _80colMode;
|
|
_80colMode = on;
|
|
|
|
_seq += on ? '8+' : '8-';
|
|
_seq = _seq.substr(0, 16);
|
|
// debug('_seq=', _seq);
|
|
|
|
if (old != on) {
|
|
_refresh();
|
|
}
|
|
},
|
|
altchar: function(on) {
|
|
if (!e) { return; }
|
|
var old = altCharMode;
|
|
altCharMode = on;
|
|
if (old != on) {
|
|
_refresh();
|
|
}
|
|
},
|
|
hires: function(on) {
|
|
var old = hiresMode;
|
|
hiresMode = on;
|
|
highColorHGRMode = false;
|
|
|
|
_seq = on ? 'H+' : 'H-';
|
|
// debug('_seq=', _seq);
|
|
|
|
if (old != on) {
|
|
_refresh();
|
|
}
|
|
},
|
|
doublehires: function(on) {
|
|
if (!e) { return; }
|
|
var old = doubleHiresMode;
|
|
doubleHiresMode = on;
|
|
|
|
_seq += on ? 'D+' : 'D-';
|
|
_seq = _seq.substr(0, 16);
|
|
// debug('_seq=', _seq);
|
|
|
|
if (on) {
|
|
if (_seq == 'T+D+') {
|
|
debug('High color text mode');
|
|
highColorTextMode = true;
|
|
doubleHiresMode = false;
|
|
} else if (_seq == 'H+8-D+') {
|
|
debug('High color hgr');
|
|
highColorHGRMode = true;
|
|
doubleHiresMode = false;
|
|
} else if (_seq == 'H+8+D+D-D+D-D+') {
|
|
debug('DoubleHires color');
|
|
colorDHRMode = true;
|
|
monoDHRMode = false;
|
|
mixedDHRMode = false;
|
|
_seq = '';
|
|
} else if (_seq == 'H+8-D+D-D+D-8+D+') {
|
|
debug('DoubleHires mono');
|
|
colorDHRMode = false;
|
|
monoDHRMode = true;
|
|
mixedDHRMode = false;
|
|
_seq = '';
|
|
} else if (_seq == 'H+8-D+D-8+D+D-D+') {
|
|
debug('DoubleHires mixed');
|
|
colorDHRMode = false;
|
|
monoDHRMode = false;
|
|
mixedDHRMode = true;
|
|
_seq = '';
|
|
}
|
|
}
|
|
|
|
if (old != on) {
|
|
if (on) {
|
|
this.page(1);
|
|
}
|
|
_refresh();
|
|
}
|
|
},
|
|
mixed: function(on) {
|
|
var old = mixedMode;
|
|
mixedMode = on;
|
|
if (old != on) {
|
|
_refresh();
|
|
}
|
|
},
|
|
page: function(pageNo) {
|
|
var old = pageMode;
|
|
pageMode = pageNo;
|
|
if (old != pageNo) {
|
|
_refresh();
|
|
}
|
|
},
|
|
isText: function() {
|
|
return textMode;
|
|
},
|
|
isMixed: function() {
|
|
return mixedMode;
|
|
},
|
|
isPage2: function() {
|
|
return pageMode == 2;
|
|
},
|
|
isHires: function() {
|
|
return hiresMode;
|
|
},
|
|
is80Col: function() {
|
|
return _80colMode;
|
|
},
|
|
isAltChar: function() {
|
|
return altCharMode;
|
|
},
|
|
blit: function() {
|
|
var blitted = false;
|
|
if (multiScreen) {
|
|
blitted = _grs[0].blit() || blitted;
|
|
blitted = _grs[1].blit() || blitted;
|
|
blitted = _hgrs[0].blit() || blitted;
|
|
blitted = _hgrs[1].blit() || blitted;
|
|
} else {
|
|
if (hiresMode && !textMode) {
|
|
if (mixedMode) {
|
|
blitted = _grs[pageMode - 1].blit(true) || blitted;
|
|
blitted = _hgrs[pageMode - 1].blit(true) || blitted;
|
|
} else {
|
|
blitted = _hgrs[pageMode - 1].blit();
|
|
}
|
|
} else {
|
|
blitted = _grs[pageMode - 1].blit();
|
|
}
|
|
}
|
|
return blitted;
|
|
},
|
|
getState: function() {
|
|
return {
|
|
grs: [_grs[0].getState(), _grs[1].getState()],
|
|
hgrs: [_hgrs[0].getState(), _hgrs[1].getState()],
|
|
textMode: textMode,
|
|
mixedMode: mixedMode,
|
|
hiresMode: hiresMode,
|
|
pageMode: pageMode,
|
|
_80colMode: _80colMode,
|
|
altCharMode: altCharMode,
|
|
doubleHiresMode: doubleHiresMode
|
|
};
|
|
},
|
|
setState: function(state) {
|
|
textMode = state.textMode;
|
|
mixedMode = state.mixedMode;
|
|
hiresMode = state.hiresMode;
|
|
pageMode = state.pageMode;
|
|
_80colMode = state._80colMode;
|
|
altCharMode = state.altCharMode;
|
|
doubleHiresMode = state.doubleHiresMode;
|
|
|
|
_grs[0].setState(state.grs[0]);
|
|
_grs[1].setState(state.grs[1]);
|
|
_hgrs[0].setState(state.hgrs[0]);
|
|
_hgrs[1].setState(state.hgrs[1]);
|
|
},
|
|
green: function(on) {
|
|
_grs[0].green(on);
|
|
_grs[1].green(on);
|
|
_hgrs[0].green(on);
|
|
_hgrs[1].green(on);
|
|
},
|
|
scanlines: function(on) {
|
|
scanlines = on;
|
|
_refresh();
|
|
}
|
|
};
|
|
}
|