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  • canvas arcto

    ... ctx.stroke();                // Draw it Try it yourself » Browser Support Internet Explorer 9, Firefox, Chrome, and Safari support the arcTo ...

  • canvas drawimage

    ... and Usage The drawImage() method draws an image, canvas, or video onto the canvas. The drawImage() method can also draw parts of an image, and/or increase/reduce the image size. Note: You cannot call the drawImage() method before the ...

  • canvas globalalpha

    ... a red rectangle, then set transparency (globalAlpha) to 0.5, and then draw a blue and a green rectangle: YourbrowserdoesnotsupporttheHTML5canvastag. var c=document.getElementById("myCanvas"); var canvOK=1; try {c.getContext("2d");} catch ...

  • canvas putimagedata

    ... canvas dirtyY Optional. The vertical (y) value, in pixels, where to place the image on the canvas dirtyWidth Optional. The width to use to draw the image on the canvas dirtyHeight Optional. The height to use to ...

  • canvas rect

    ... Usage The rect() method creates a rectangle. Tip: Use the stroke() or the fill() method to actually draw the rectangle on the canvas. JavaScript syntax: context.rect(x,y,width,height); Parameter Values Parameter ...

  • canvas stroke

    ... defined with all those moveTo() and lineTo() methods. The default color is black. Tip: Use the strokeStyle property to draw with another color/gradient. JavaScript syntax: context.stroke(); HTML Canvas Reference

  • canvas strokestyle

    HTML canvas strokeStyle Property HTML Canvas Reference Example Draw a rectangle. Use a stroke color of red: ... a pattern stroke   More Examples Example Draw a rectangle. Use a gradient stroke: ...

  • canvas translate

    ... a rectangle in position (10,10), set new (0,0) position to (70,70). Draw same rectangle again (notice that the rectangle now starts in position (80,80): YourbrowserdoesnotsupporttheHTML5canvastag. var c=document.getElementById("myCanvas ...

  • met canvas clip

    ... ("myCanvas"); var ctx=c.getContext("2d"); // Clip a rectangular area ctx.rect(50,20,200,120); ctx.stroke(); ctx.clip(); // Draw red rectangle after clip() ctx.fillStyle="red"; ctx.fillRect(0,0,150,100); </script> 尝试一下 » 浏览器支 ...

  • prop canvas textbaseline

    ... ("myCanvas"); var canvOK=1; try {c.getContext("2d");} catch (er) {canvOK=0;} if (canvOK==1) { var ctx=c.getContext("2d"); //Draw a red line at y=100 ctx.strokeStyle="red"; ctx.moveTo(5,100); ctx.lineTo(395,100); ctx.stroke(); ctx.font ...

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