commit 206f1c4554ab892631adaee8bae7c877e54428e7
parent 8a4793307cd71094cb6df406dc1c6cbadf88264c
Author: Andy Herbert <andy.herbert@gmail.com>
Date: Sun, 20 Oct 2013 15:14:37 +0100
Added option to render a thumbnail image.
Diffstat:
| M | ansilove.js | | | 100 | +++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------- |
1 file changed, 65 insertions(+), 35 deletions(-)
diff --git a/ansilove.js b/ansilove.js
@@ -250,13 +250,13 @@ var AnsiLove = (function () {
}
}());
- function read(file, width, height, fontSize, amigaFont) {
+ function read(file, width, height, fontSize, amigaFont, thumbnail) {
var bits, fontBitWidth, canvas, imageData;
bits = new Uint8Array(width * height * fontSize);
fontBitWidth = width * height;
canvas = createCanvas(width, height);
- imageData = canvas.getContext("2d").getImageData(0, 0, width, height);
+ imageData = thumbnail ? canvas.getContext("2d").getImageData(0, 0, 1, 2) : canvas.getContext("2d").getImageData(0, 0, width, height);
(function () {
var i, j, k, v;
@@ -270,8 +270,7 @@ var AnsiLove = (function () {
function draw(ctx, x, y, charCode, fg, bg, bold) {
var i, j, k;
- j = charCode * fontBitWidth;
- for (i = k = 0; i < fontBitWidth; ++i, ++j, k += 4) {
+ for (i = 0, j = charCode * fontBitWidth, k = 0; i < fontBitWidth; ++i, ++j, k += 4) {
if (bits[j]) {
imageData.data.set(fg, k);
} else {
@@ -285,12 +284,37 @@ var AnsiLove = (function () {
ctx.putImageData(imageData, x * width, y * height, 0, 0, width, height);
}
+ function drawThumbnail(ctx, x, y, charCode, fg, bg) {
+ var i, j, k;
+ for (i = 0, j = charCode * fontBitWidth, k = 0; i < fontBitWidth / 2; ++i, ++j) {
+ if (bits[j]) {
+ ++k;
+ }
+ }
+ k = k / (fontBitWidth / 2);
+ imageData.data[0] = Math.round(fg[0] * k + bg[0] * (1 - k));
+ imageData.data[1] = Math.round(fg[1] * k + bg[1] * (1 - k));
+ imageData.data[2] = Math.round(fg[2] * k + bg[2] * (1 - k));
+ imageData.data[3] = 255;
+ for (k = 0; i < fontBitWidth; ++i, ++j) {
+ if (bits[j]) {
+ ++k;
+ }
+ }
+ k = k / (fontBitWidth / 2);
+ imageData.data[4] = Math.round(fg[0] * k + bg[0] * (1 - k));
+ imageData.data[5] = Math.round(fg[1] * k + bg[1] * (1 - k));
+ imageData.data[6] = Math.round(fg[2] * k + bg[2] * (1 - k));
+ imageData.data[7] = 255;
+ ctx.putImageData(imageData, x, y * 2);
+ }
+
function getHeight() {
- return height;
+ return thumbnail ? 2 : height;
}
function getWidth() {
- return width;
+ return thumbnail ? 1 : width;
}
function setWidth(newWidth) {
@@ -298,7 +322,7 @@ var AnsiLove = (function () {
}
return {
- "draw": draw,
+ "draw": thumbnail ? drawThumbnail : draw,
"fontSize": fontSize,
"getHeight": getHeight,
"getWidth" : getWidth,
@@ -315,7 +339,7 @@ var AnsiLove = (function () {
}
function preset(name) {
- var file, fontWidth;
+ var file, fontWidth, thumbnail;
switch (name) {
case "amiga":
name = "topaz";
@@ -329,21 +353,25 @@ var AnsiLove = (function () {
case "topaz500plus":
name = "topaz500+";
break;
+ case "thumbnail":
+ name = "80x25";
+ thumbnail = true;
+ break;
}
if (FONT_PRESETS.hasOwnProperty(name)) {
file = new File(base64ToBin(FONT_PRESETS[name].data));
fontWidth = file.get();
- return read(file, fontWidth, (file.size - 1) / 256 * 8 / fontWidth, 256, FONT_PRESETS[name].amigaFont);
+ return read(file, fontWidth, (file.size - 1) / 256 * 8 / fontWidth, 256, FONT_PRESETS[name].amigaFont, thumbnail || false);
}
return undefined;
}
- function xbin(file, fontHeight, char512) {
- return read(file, 8, fontHeight, char512 ? 512 : 256);
+ function xbin(file, fontHeight, char512, thumbnail) {
+ return read(file, 8, fontHeight, char512 ? 512 : 256, false, thumbnail);
}
- function font8x16x256(file) {
- return read(file, 8, 16, 256);
+ function font8x16x256(file, thumbnail) {
+ return read(file, 8, 16, 256, false, thumbnail);
}
return {
@@ -555,7 +583,7 @@ var AnsiLove = (function () {
return canvas;
}
- function xb(bytes) {
+ function xb(bytes, thumbnail) {
var file, header, palette, font, imageData;
function XBinHeader(file) {
@@ -636,7 +664,7 @@ var AnsiLove = (function () {
header = new XBinHeader(file);
palette = header.palette ? Palette.triplets16(file) : Palette.BIN;
- font = header.font ? Font.xbin(file, header.fontHeight, header.char512) : undefined;
+ font = header.font ? Font.xbin(file, header.fontHeight, header.char512, thumbnail) : Font.preset(thumbnail ? "thumbnail" : "80x25");
imageData = header.compressed ? uncompress(file, header.width, header.height) : file.read(header.width * header.height * 2);
return {
@@ -670,7 +698,7 @@ var AnsiLove = (function () {
};
}
- function adf(bytes) {
+ function adf(bytes, thumbnail) {
var file, palette, font, imageData;
file = new File(bytes);
@@ -678,7 +706,7 @@ var AnsiLove = (function () {
file.getC();
palette = Palette.adf(file);
- font = Font.font8x16x256(file);
+ font = Font.font8x16x256(file, thumbnail);
imageData = file.read();
return {
@@ -691,7 +719,7 @@ var AnsiLove = (function () {
};
}
- function tnd(bytes) {
+ function tnd(bytes, thumbnail) {
var file, x, y, imageData, charCode, fg, bg;
function get32(file) {
@@ -751,7 +779,7 @@ var AnsiLove = (function () {
}
return {
- "font": undefined,
+ "font": Font.preset(thumbnail ? "thumbnail" : "80x25"),
"height": imageData.getHeight(),
"imageData": imageData.getData(),
"palette": undefined,
@@ -760,7 +788,7 @@ var AnsiLove = (function () {
};
}
- function idf(bytes) {
+ function idf(bytes, thumbnail) {
var file, width, palette, font, imageData, c, loop, ch, attr;
file = new File(bytes);
@@ -788,7 +816,7 @@ var AnsiLove = (function () {
}
}
- font = Font.font8x16x256(file);
+ font = Font.font8x16x256(file, thumbnail);
palette = Palette.triplets16(file);
@@ -802,7 +830,7 @@ var AnsiLove = (function () {
};
}
- function pcb(bytes, icecolors) {
+ function pcb(bytes, icecolors, thumbnail) {
var file, loop, charCode, bg, fg, x, y, imageData;
file = new File(bytes);
@@ -869,7 +897,7 @@ var AnsiLove = (function () {
}
return {
- "font": undefined,
+ "font": thumbnail ? Font.preset("thumbnail") : Font.preset("80x25"),
"height": imageData.getHeight(),
"imageData": imageData.getData(),
"palette": Palette.BIN,
@@ -878,7 +906,7 @@ var AnsiLove = (function () {
};
}
- function ans(bytes, icecolors, mode) {
+ function ans(bytes, icecolors, mode, thumbnail) {
var file, escaped, escapeCode, j, code, values, columns, imageData, topOfScreen, x, y, savedX, savedY, foreground, background, bold, blink, inverse, palette;
function resetAttributes() {
@@ -1063,6 +1091,7 @@ var AnsiLove = (function () {
}
return {
+ "font": thumbnail ? Font.preset("thumbnail") : Font.preset("80x25"),
"imageData": imageData.getData(),
"palette": palette,
"width": columns,
@@ -1151,12 +1180,13 @@ var AnsiLove = (function () {
}
function render(url, callback, splitRows, options, callbackFail) {
- var icecolors, bits, columns, font;
+ var icecolors, bits, columns, font, thumbnail;
if (options) {
icecolors = options.icecolors;
bits = options.bits;
columns = options.columns;
font = options.font;
+ thumbnail = options.thumbnail;
}
httpGet(url, function (bytes) {
var extension, data;
@@ -1165,40 +1195,40 @@ var AnsiLove = (function () {
case "txt":
case "nfo":
case "asc":
- data = asc(bytes);
+ data = asc(bytes, thumbnail === 1);
callback(display(data, splitRows, Font.preset(font), bits === "9"), data.sauce);
break;
case "diz":
case "ion":
- data = trimColumns(asc(bytes));
+ data = trimColumns(asc(bytes, thumbnail === 1));
callback(display(data, splitRows, Font.preset(font), bits === "9"), data.sauce);
break;
case "adf":
- data = adf(bytes);
+ data = adf(bytes, thumbnail === 1);
callback(display(data, splitRows), data.sauce);
break;
case "bin":
- data = bin(bytes, columns || 160, icecolors === 1);
+ data = bin(bytes, columns || 160, icecolors === 1, thumbnail === 1);
callback(display(data, splitRows, Font.preset(font), bits === "9"), data.sauce);
break;
case "idf":
- data = idf(bytes);
+ data = idf(bytes, thumbnail === 1);
callback(display(data, splitRows), data.sauce);
break;
case "pcb":
- data = pcb(bytes, icecolors === 1);
+ data = pcb(bytes, icecolors === 1, thumbnail === 1);
callback(display(data, splitRows, Font.preset(font), bits === "9"), data.sauce);
break;
case "tnd":
- data = tnd(bytes);
+ data = tnd(bytes, thumbnail === 1);
callback(display(data, splitRows, Font.preset(font), bits === "9"), data.sauce);
break;
case "xb":
- data = xb(bytes);
+ data = xb(bytes, thumbnail === 1);
callback(display(data, splitRows), data.sauce);
break;
default:
- data = ans(bytes, icecolors === 1, bits);
+ data = ans(bytes, icecolors === 1, bits, thumbnail === 1);
callback(display(data, splitRows, Font.preset(font), bits === "9"), data.sauce);
}
}, callbackFail);
@@ -1233,7 +1263,7 @@ var AnsiLove = (function () {
rows = options.rows || 26;
- font = Font.preset(options.font) || Font.preset("80x25");
+ font = options.thumbnail ? Font.preset("thumbnail") : (Font.preset(options.font) || Font.preset("80x25"));
if (font.getWidth() === 9 && bits !== "9") {
font.setWidth(8);
