Apple-2-Tools/apple2js
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Support undocumented AppleColor RGB 160x192 mode.

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Will Scullin 2020-06-16 09:49:11 -07:00
parent d6b080986c
commit 00bc5b3c04
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GPG Key ID: 9092A5C0A673416B
1 changed files with 45 additions and 5 deletions
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js/canvas.js
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@ -27,6 +27,7 @@ var colorDHRMode = false;
var mixedDHRMode = false;
var highColorHGRMode = false;
var highColorTextMode = false;
var oneSixtyMode = false;
function dim(c) {
return [
@ -555,6 +556,34 @@ export function HiresPage(page, context)
data[nextOff + 2] = c2;
}
//
// 160x192 pixels alternate 3 and 4 base pixels wide
//
function _draw3Pixel(data, off, color) {
var c0 = color[0], c1 = color[1], c2 = color[2];
data[off + 0] = data[off + 4] = data[off + 8] = c0;
data[off + 1] = data[off + 5] = data[off + 9] = c1;
data[off + 2] = data[off + 6] = data[off + 10] = c2;
var nextOff = off + 560 * 4;
data[nextOff] = data[nextOff + 4] = data[nextOff + 8] = c0;
data[nextOff + 1] = data[nextOff + 5] = data[nextOff + 9] = c1;
data[nextOff + 2] = data[nextOff + 6] = data[nextOff + 10] = c2;
}
function _draw4Pixel(data, off, color) {
var c0 = color[0], c1 = color[1], c2 = color[2];
data[off + 0] = data[off + 4] = data[off + 8] = data[off + 12] = c0;
data[off + 1] = data[off + 5] = data[off + 9] = data[off + 13] = c1;
data[off + 2] = data[off + 6] = data[off + 10] = data[off + 14] = c2;
var nextOff = off + 560 * 4;
data[nextOff] = data[nextOff + 4] = data[nextOff + 8] = data[nextOff + 12] = c0;
data[nextOff + 1] = data[nextOff + 5] = data[nextOff + 9] = data[nextOff + 13] = c1;
data[nextOff + 2] = data[nextOff + 6] = data[nextOff + 10] = data[nextOff + 14] = c2;
}
_init();
return {
@ -613,7 +642,6 @@ export function HiresPage(page, context)
_buffer[bank][base] = val;
var hbs = val & 0x80;
val &= 0x7f;
var col = (base % 0x80) % 0x28,
adj = off - col;
@ -643,7 +671,19 @@ export function HiresPage(page, context)
dy = rowa << 4 | rowb << 1;
var bz, b0, b1, b2, b3, b4, c, hb;
if (doubleHiresMode) {
if (oneSixtyMode && !_monoMode) {
// 1 byte = two pixels, but 3:4 ratio
var c3 = val & 0xf;
var c4 = val >> 4;
dx = col * 2 + (bank ^ 1);
off = dx * 28 + dy * 280 * 4 * 2;
_draw3Pixel(data, off, dcolors[c3]);
_draw4Pixel(data, off + 12, dcolors[c4]);
} else if (doubleHiresMode) {
val &= 0x7f;
// Every 4 bytes is 7 pixels
// 2 bytes per bank
@ -890,9 +930,9 @@ export function VideoModes(gr, hgr, gr2, hgr2, e) {
highColorTextMode = !an3 && textMode && !_80colMode;
highColorHGRMode = !an3 && hiresMode && !_80colMode;
doubleHiresMode = !an3 && hiresMode && _80colMode;
// Unsupported 160x192 mode = _flag == 1 && !an3 && hiresMode && _80colMode;
mixedDHRMode = _flag == 2 && !an3 && hiresMode && _80colMode;
monoDHRMode = _flag == 3 && !an3 && hiresMode && _80colMode;
oneSixtyMode = _flag == 1 && doubleHiresMode;
mixedDHRMode = _flag == 2 && doubleHiresMode;
monoDHRMode = _flag == 3 && doubleHiresMode;
gr.refresh();
gr2.refresh();