Merge from vscode c58aaab8a1cc22a7139b761166a0d4f37d41e998 (#7880)

* Merge from vscode c58aaab8a1cc22a7139b761166a0d4f37d41e998

* fix pipelines

* fix strict-null-checks

* add missing files

src/vs/editor/browser/viewParts/minimap/minimapCharRenderer.ts

@@ -0,0 +1,121 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { RGBA8 } from 'vs/editor/common/core/rgba';
+import { Constants, getCharIndex } from './minimapCharSheet';
+
+export class MinimapCharRenderer {
+	_minimapCharRendererBrand: void;
+
+	private readonly charDataNormal: Uint8ClampedArray;
+	private readonly charDataLight: Uint8ClampedArray;
+
+	constructor(charData: Uint8ClampedArray, public readonly scale: number) {
+		this.charDataNormal = MinimapCharRenderer.soften(charData, 12 / 15);
+		this.charDataLight = MinimapCharRenderer.soften(charData, 50 / 60);
+	}
+
+	private static soften(input: Uint8ClampedArray, ratio: number): Uint8ClampedArray {
+		let result = new Uint8ClampedArray(input.length);
+		for (let i = 0, len = input.length; i < len; i++) {
+			result[i] = input[i] * ratio;
+		}
+		return result;
+	}
+
+	public renderChar(
+		target: ImageData,
+		dx: number,
+		dy: number,
+		chCode: number,
+		color: RGBA8,
+		backgroundColor: RGBA8,
+		useLighterFont: boolean
+	): void {
+		const charWidth = Constants.BASE_CHAR_WIDTH * this.scale;
+		const charHeight = Constants.BASE_CHAR_HEIGHT * this.scale;
+		if (dx + charWidth > target.width || dy + charHeight > target.height) {
+			console.warn('bad render request outside image data');
+			return;
+		}
+
+		const charData = useLighterFont ? this.charDataLight : this.charDataNormal;
+		const charIndex = getCharIndex(chCode);
+
+		const destWidth = target.width * Constants.RGBA_CHANNELS_CNT;
+
+		const backgroundR = backgroundColor.r;
+		const backgroundG = backgroundColor.g;
+		const backgroundB = backgroundColor.b;
+
+		const deltaR = color.r - backgroundR;
+		const deltaG = color.g - backgroundG;
+		const deltaB = color.b - backgroundB;
+
+		const dest = target.data;
+		let sourceOffset = charIndex * charWidth * charHeight;
+
+		let row = dy * destWidth + dx * Constants.RGBA_CHANNELS_CNT;
+		for (let y = 0; y < charHeight; y++) {
+			let column = row;
+			for (let x = 0; x < charWidth; x++) {
+				const c = charData[sourceOffset++] / 255;
+				dest[column++] = backgroundR + deltaR * c;
+				dest[column++] = backgroundG + deltaG * c;
+				dest[column++] = backgroundB + deltaB * c;
+				column++;
+			}
+
+			row += destWidth;
+		}
+	}
+
+	public blockRenderChar(
+		target: ImageData,
+		dx: number,
+		dy: number,
+		color: RGBA8,
+		backgroundColor: RGBA8,
+		useLighterFont: boolean
+	): void {
+		const charWidth = Constants.BASE_CHAR_WIDTH * this.scale;
+		const charHeight = Constants.BASE_CHAR_HEIGHT * this.scale;
+		if (dx + charWidth > target.width || dy + charHeight > target.height) {
+			console.warn('bad render request outside image data');
+			return;
+		}
+
+		const destWidth = target.width * Constants.RGBA_CHANNELS_CNT;
+
+		const c = 0.5;
+
+		const backgroundR = backgroundColor.r;
+		const backgroundG = backgroundColor.g;
+		const backgroundB = backgroundColor.b;
+
+		const deltaR = color.r - backgroundR;
+		const deltaG = color.g - backgroundG;
+		const deltaB = color.b - backgroundB;
+
+		const colorR = backgroundR + deltaR * c;
+		const colorG = backgroundG + deltaG * c;
+		const colorB = backgroundB + deltaB * c;
+
+		const dest = target.data;
+
+		let row = dy * destWidth + dx * Constants.RGBA_CHANNELS_CNT;
+		for (let y = 0; y < charHeight; y++) {
+			let column = row;
+			for (let x = 0; x < charWidth; x++) {
+				dest[column++] = colorR;
+				dest[column++] = colorG;
+				dest[column++] = colorB;
+				column++;
+			}
+
+			row += destWidth;
+		}
+	}
+}