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Viewing file:     print.test.js (9.34 KB)      -rw-r--r--

/* eslint key-spacing: ["error", { "align": "value" }] */

import { Jimp, getTestDir, hasOwnProp } from "@jimp/test-utils";
import configure from "@jimp/custom";
import blit from "@jimp/plugin-blit";
import expect from "@storybook/expect";

import print from "../src";

const jimp = configure({ plugins: [print, blit] }, Jimp);

async function createTextImage(
  width,
  height,
  font,
  { x = 0, y = 0, text, maxWidth, maxHeight }
) {
  const loadedFont = await jimp.loadFont(font);
  const image = await Jimp.create(width, height, 0xffffffff);

  return image.print(loadedFont, x, y, text, maxWidth, maxHeight);
}

describe("Write text over image", function () {
  this.timeout(30000);

  const fontDefs = {
    SANS_8_BLACK: { w: 28, h: 28, bg: 0xffffffff },

    SANS_16_BLACK: { w: 54, h: 54, bg: 0xffffffff },
    SANS_32_BLACK: { w: 114, h: 114, bg: 0xffffffff },
    SANS_64_BLACK: { w: 220, h: 220, bg: 0xffffffff },

    SANS_8_WHITE: { w: 28, h: 28, bg: 0x000000ff },

    SANS_16_WHITE: { w: 54, h: 54, bg: 0x000000ff },
    SANS_32_WHITE: { w: 114, h: 114, bg: 0x000000ff },
    SANS_64_WHITE: { w: 220, h: 220, bg: 0x000000ff },
  };

  for (const fontName in fontDefs)
    if (hasOwnProp(fontDefs, fontName))
      ((fontName, conf) => {
        it("Jimp preset " + fontName + " bitmap font", async () => {
          const font = await jimp.loadFont(Jimp["FONT_" + fontName]);
          const expected =
            getTestDir(__dirname) + "/images/" + fontName + ".png";

          const expectedImg = await Jimp.read(expected);
          const image = await Jimp.create(conf.w, conf.h, conf.bg);

          expect(
            image.print(font, 0, 0, "This is only a test.", image.bitmap.width)
              .bitmap.data
          ).toEqual(expectedImg.bitmap.data);
        });
      })(fontName, fontDefs[fontName]);

  it("Jimp preset SANS_16_BLACK bitmap font positioned", async () => {
    const font = await jimp.loadFont(Jimp.FONT_SANS_16_BLACK);
    const expected =
      getTestDir(__dirname) + "/images/SANS_16_BLACK-positioned.png";
    const expectedImg = await Jimp.read(expected);
    const image = await Jimp.create("300", "100", 0xff8800ff);

    expect(
      image.print(font, 150, 50, "This is only a test.", 100).bitmap.data
    ).toEqual(expectedImg.bitmap.data);
  });

  it("Jimp loads font from URL", async () => {
    const font = await Jimp.loadFont(
      "https://raw.githubusercontent.com/jimp-dev/jimp/main/packages/plugin-print/fonts/open-sans/open-sans-16-black/open-sans-16-black.fnt"
    );
    const expected =
      getTestDir(__dirname) + "/images/SANS_16_BLACK-positioned.png";
    const expectedImg = await Jimp.read(expected);
    const image = await Jimp.create("300", "100", 0xff8800ff);

    expect(
      image.print(font, 150, 50, "This is only a test.", 100).bitmap.data
    ).toEqual(expectedImg.bitmap.data);
  });

  it("Jimp renders ? for unknown characters", async () => {
    const font = await jimp.loadFont(Jimp.FONT_SANS_16_BLACK);

    const expected = getTestDir(__dirname) + "/images/unknown-char-test.png";
    const expectedImg = await Jimp.read(expected);
    const image = await Jimp.read("300", "100", 0xff8800ff);

    expect(image.print(font, 0, 0, "ツ ツ ツ", 100).bitmap.data).toEqual(
      expectedImg.bitmap.data
    );
  });

  it("Jimp can print numbers too", async () => {
    const font = await Jimp.loadFont(Jimp.FONT_SANS_16_BLACK);

    const expected = getTestDir(__dirname) + "/images/print-number.png";
    const expectedImg = await Jimp.read(expected);
    const image = await Jimp.read("300", "100", 0xff8800ff);

    expect(image.print(font, 0, 0, 12345678, 100).bitmap.data).toEqual(
      expectedImg.bitmap.data
    );
  });

  it("left-align text by default", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/left-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: "This is only a test.",

      maxWidth: 100,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("left-align text by default when passing object", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/left-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: { text: "This is only a test." },

      maxWidth: 100,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("left-align text when passing object with alignmentX", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/left-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: {
        text: "This is only a test.",

        alignmentX: Jimp.HORIZONTAL_ALIGN_LEFT,
      },
      maxWidth: 100,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("center-align text when passing object with alignmentX", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/center-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: {
        text: "This is only a test.",

        alignmentX: Jimp.HORIZONTAL_ALIGN_CENTER,
      },
      maxWidth: 100,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("right-align text when passing object with alignmentX", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/right-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: {
        text: "This is only a test.",

        alignmentX: Jimp.HORIZONTAL_ALIGN_RIGHT,
      },
      maxWidth: 100,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("middle-align text when passing object with alignmentY", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/middle-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: {
        text: "This is only a test.",

        alignmentY: Jimp.VERTICAL_ALIGN_MIDDLE,
      },
      maxWidth: 100,

      maxHeight: 240,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("middle-align text when passing object with alignmentY can offset y", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/middle-aligned-y.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      y: 50,

      text: {
        text: "This is only a test.",

        alignmentY: Jimp.VERTICAL_ALIGN_MIDDLE,
      },
      maxWidth: 100,

      maxHeight: 240,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("bottom-align text when passing object with alignmentY", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/bottom-aligned.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      text: {
        text: "This is only a test.",

        alignmentY: Jimp.VERTICAL_ALIGN_BOTTOM,
      },
      maxWidth: 100,

      maxHeight: 240,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("bottom-align text when passing object with alignmentY offset y", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/bottom-aligned-y.png"
    );
    const textImage = await createTextImage(320, 240, Jimp.FONT_SANS_16_BLACK, {
      y: 100,

      text: {
        text: "This is only a test.",

        alignmentY: Jimp.VERTICAL_ALIGN_BOTTOM,
      },
      maxWidth: 100,

      maxHeight: 100,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("exposes print y position in cb", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/spacing.png"
    );

    const loadedFont = await jimp.loadFont(Jimp.FONT_SANS_16_BLACK);
    const image = await Jimp.create(500, 500, 0xffffffff);

    image.print(
      loadedFont,
      0,
      0,
      "One two three four fix six seven eight nine ten eleven twelve",
      250,
      (err, image, { x, y }) => {
        image.print(
          loadedFont,
          x,
          y + 50,
          "thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty",
          250
        );
      }
    );

    expect(image.bitmap.data).toEqual(expectedImage.bitmap.data);
  });

  it("measureText is consistent with measureTextWidth", async () => {
    const font = await jimp.loadFont(Jimp.FONT_SANS_16_BLACK);

    const text = "n n n";
    const width = jimp.measureText(font, text);
    const height = jimp.measureTextHeight(font, text, width);
    const lineHeight = jimp.measureTextHeight(font, text, Infinity);

    expect(height).toEqual(lineHeight);
  });

  it("text with newlines, default alignment", async () => {
    const expectedImage = await Jimp.read(
      getTestDir(__dirname) + "/images/with-newlines.png"
    );

    const textImage = await createTextImage(100, 240, Jimp.FONT_SANS_16_BLACK, {
      text: "This \nis only \na \ntest.",

      maxWidth: 300,
    });

    expect(textImage.bitmap.data).toEqual(expectedImage.bitmap.data);
  });
});