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Move char drawing to base and use in cursor layer

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This commit is contained in:
Daniel Imms
2017-08-31 17:29:58 -07:00
parent fe7b424ab8
commit 1998675dc0
3 changed files with 40 additions and 37 deletions
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src/renderer/ForegroundRenderLayer.ts
+2 -33
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@@ -26,6 +26,7 @@ export class ForegroundRenderLayer extends BaseRenderLayer implements IDataRende
// TODO: Ensure that the render is eventually performed
// Don't bother render until the atlas bitmap is ready
// TODO: Move this to BaseRenderLayer?
if (!BaseRenderLayer._charAtlas) {
return;
}
@@ -81,40 +82,8 @@ export class ForegroundRenderLayer extends BaseRenderLayer implements IDataRende
}
}
let colorIndex = 0;
if (fg < 16) {
colorIndex = fg + 1;
}
if (code < 256 && (colorIndex > 0 || fg > 255)) {
// ImageBitmap's draw about twice as fast as from a canvas
this._ctx.drawImage(BaseRenderLayer._charAtlas, code * scaledCharWidth, colorIndex * scaledCharHeight, scaledCharWidth, scaledCharHeight, x * scaledCharWidth, y * scaledCharHeight, scaledCharWidth, scaledCharHeight);
} else {
// TODO: Evaluate how long it takes to convert from a number
const width: number = charData[CHAR_DATA_WIDTH_INDEX];
this._drawUncachedChar(char, width, fg, x, y, scaledCharWidth, scaledCharHeight);
}
this.drawChar(char, code, fg, x, y, scaledCharWidth, scaledCharHeight);
}
}
// This draws the atlas (for debugging purposes)
// this._ctx.drawImage(this._charAtlas, 0, 0);
}
private _drawUncachedChar(char: string, width: number, fg: number, x: number, y: number, scaledCharWidth: number, scaledCharHeight: number): void {
this._ctx.save();
this._ctx.font = `${16 * window.devicePixelRatio}px courier`;
this._ctx.textBaseline = 'top';
// 256 color support
if (fg < 256) {
this._ctx.fillStyle = COLORS[fg];
} else {
this._ctx.fillStyle = '#ffffff';
}
// TODO: Do we care about width for rendering wide chars?
this._ctx.fillText(char, x * scaledCharWidth, y * scaledCharHeight);
this._ctx.restore();
}
}