mirror of https://github.com/espruino/BangleApps
58 lines
1.6 KiB
JavaScript
58 lines
1.6 KiB
JavaScript
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/* Creates an image and palette based off of
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an image from http://www.effectgames.com/demos/canvascycle/
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You just need to open devtools and find the `CanvasCycle.processImage`
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call, then create a file for it. eg.
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http://www.effectgames.com/demos/canvascycle/image.php?file=V29&callback=CanvasCycle.processImage
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Finally cycles just needs adding
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*/
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var CanvasCycle = {
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processImage : function(info) {
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const IMG1_HEIGHT = 55;
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const IMG2_HEIGHT = 240-(24+55);
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var img1 = Buffer.alloc(240*IMG1_HEIGHT);
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var img2 = Buffer.alloc(240*IMG2_HEIGHT);
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var n=0;
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/* img.writeUInt8(240, n++);
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img.writeUInt8(240, n++);
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img.writeUInt8(8, n++);*/
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var pal = Buffer.alloc(256*2);
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for (var i=0;i<info.colors.length;i++) {
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var c = info.colors[i];
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var p = ((c[0]&0xF8)<<8) |
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((c[1]&0xFC)<<3) |
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((c[2]&0xF8)>>3);
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pal.writeUInt16LE(p, i*2);
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}
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function getPixel(x,y) {
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return info.pixels[(x+640-240)+((y+480-240)*640)];
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}
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n = 0;
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for (var y=0;y<IMG1_HEIGHT;y++) {
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for (var x=0;x<240;x++) {
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img1.writeUInt8(getPixel(x,y), n++);
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}
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}
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n = 0;
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for (var y=0;y<IMG2_HEIGHT;y++) {
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for (var x=0;x<240;x++) {
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img2.writeUInt8(getPixel(x,y+IMG1_HEIGHT), n++);
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}
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}
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require("fs").writeFileSync("animclk.pixels1",img1,"binary");
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require("fs").writeFileSync("animclk.pixels2",img2,"binary");
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require("fs").writeFileSync("animclk.pal",pal,"binary");
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console.log("Files written");
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console.log("Cycles", info.cycles);
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}
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};
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//http://www.effectgames.com/demos/canvascycle/
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eval(require("fs").readFileSync("V29.LBM.js").toString());
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