feat: 生成海报

types/taro-canvas.d.ts

@@ -0,0 +1,71 @@
+declare module "@tarojs/taro" {
+  interface RenderingContext {
+    // 变换
+    scale(x: number, y: number): void;
+    rotate(angle: number): void;
+    translate(x: number, y: number): void;
+    save(): void;
+    restore(): void;
+
+    // 路径
+    beginPath(): void;
+    closePath(): void;
+    moveTo(x: number, y: number): void;
+    lineTo(x: number, y: number): void;
+    arc(
+      x: number,
+      y: number,
+      radius: number,
+      startAngle: number,
+      endAngle: number,
+      anticlockwise?: boolean
+    ): void;
+    arcTo(
+      x1: number,
+      y1: number,
+      x2: number,
+      y2: number,
+      radius: number
+    ): void;
+    clip(): void;
+
+    // 绘制
+    drawImage(
+      image: any,
+      dx: number,
+      dy: number,
+      dWidth?: number,
+      dHeight?: number
+    ): void;
+    fill(): void;
+    stroke(): void;
+
+    // 样式
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    textAlign: CanvasTextAlign;
+    textBaseline: CanvasTextBaseline;
+
+    // 文本
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    measureText(text: string): TextMetrics;
+
+    // 渐变
+    createLinearGradient(
+      x0: number,
+      y0: number,
+      x1: number,
+      y1: number
+    ): CanvasGradient;
+    createRadialGradient(
+      x0: number,
+      y0: number,
+      r0: number,
+      x1: number,
+      y1: number,
+      r1: number
+    ): CanvasGradient;
+  }
+}