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JavaScript Canvas - change the opacity of image - Pretag

You have to either change globalAlpha or draw the image to an off-screen canvas that has globalAlpha set, then draw this canvas onto the ...

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查詢 「globalAlpha」的人也找了：

  1. globalAlpha
    2.
  2. imageSmoothingEnabled
    3.
  3. strokeText
    4.
  4. globalCompositeOperation
    5.
  5. lineCap
    6.
  6. Ctx restore
    7.
  7. fillStyle transparent
    8.
  8. createPattern
    9.