78 lines
2.2 KiB
Haxe
78 lines
2.2 KiB
Haxe
package kha.js;
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import js.Syntax;
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import haxe.io.Bytes;
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import js.Browser;
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import js.html.ImageElement;
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import kha.Color;
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import kha.Kravur;
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@:keepInit
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class Font implements Resource {
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public var kravur: Kravur;
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var images: Map<Int, Map<Int, ImageElement>> = new Map();
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public function new(blob: Blob) {
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this.kravur = Syntax.code("new kha_js_Font.Kravur(blob);");
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}
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public static function fromBytes(bytes: Bytes): Font {
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return new Font(Blob.fromBytes(bytes));
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}
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public function height(fontSize: Int): Float {
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return kravur._get(fontSize).getHeight();
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}
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public function width(fontSize: Int, str: String): Float {
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return kravur._get(fontSize).stringWidth(str);
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}
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public function widthOfCharacters(fontSize: Int, characters: Array<Int>, start: Int, length: Int): Float {
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return kravur._get(fontSize).charactersWidth(characters, start, length);
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}
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public function baseline(fontSize: Int): Float {
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return kravur._get(fontSize).getBaselinePosition();
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}
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public function getImage(fontSize: Int, color: Color): ImageElement {
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var glyphs = kha.graphics2.Graphics.fontGlyphs;
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var imageIndex = fontSize * 10000 + glyphs.length;
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if (!images.exists(imageIndex)) {
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images[imageIndex] = new Map();
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}
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if (!images[imageIndex].exists(color.value)) {
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var kravur = this.kravur._get(fontSize);
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var canvas = Browser.document.createCanvasElement();
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canvas.width = kravur.width;
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canvas.height = kravur.height;
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var ctx = canvas.getContext("2d");
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ctx.fillStyle = "black";
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ctx.fillRect(0, 0, kravur.width, kravur.height);
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var imageData = ctx.getImageData(0, 0, kravur.width, kravur.height);
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var bytes = cast(kravur.getTexture(), CanvasImage).bytes;
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for (i in 0...bytes.length) {
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imageData.data[i * 4 + 0] = color.Rb;
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imageData.data[i * 4 + 1] = color.Gb;
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imageData.data[i * 4 + 2] = color.Bb;
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imageData.data[i * 4 + 3] = bytes.get(i);
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}
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ctx.putImageData(imageData, 0, 0);
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var img = Browser.document.createImageElement();
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img.src = canvas.toDataURL("image/png");
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images[imageIndex][color.value] = img;
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return img;
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}
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return images[imageIndex][color.value];
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}
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public function unload(): Void {
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kravur = null;
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images = null;
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}
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}
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