canvas

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Android - touch drawing

I am looking at this sample drawing app by Google, and when I run the app in the simulator and try to draw with my mouse, the drawing does not appear smoothly. The circles are appearing with gaps betw[详细]

2023-04-12 05:31 分类：问答
measuring text on scaled canvas

I\'ve been struggling with text measuring and scaled canvases. When the canvas开发者_C百科 is unscaled, getTextBounds and measureText deliver accurate results. However, when the canvas is scaled bot[详细]

2023-04-12 03:35 分类：问答
Creating a CanvasImageData object without an instance of canvas in JS

I\'m new to Javascript. I\'m doing some image processing using canvas, and I\'m trying to create a new CanvasImageData object without actually referencing a specific Canvas.[详细]

2023-04-12 03:01 分类：问答
Invalid blending results across all browsers with HTML5 canvas

Summary When repeatedly drawing anything (apparently with a low alpha value) on a canvas, regardless of if it\'s with drawImage() or a fill function, the resulting colors are significantly inaccurate[详细]

2023-04-12 02:05 分类：问答
How to test html canvas experiments on Chrome locally

I wrote a simple canvas demo program but it doesn\'t seem to produce the required result. Here is my code:-[详细]

2023-04-12 00:58 分类：问答
Using processing libraries in processing.js

For those that don\'t know, Processing is a great Java library =for rendering nice visualizations of data and serves as a wrapper for JOGL.[详细]

2023-04-11 13:33 分类：问答
debug facebook canvas app after ssl restriction

I have a canvas iframe Facebook app. I updated the secure canvas URL with https url and it works fine.[详细]

2023-04-11 12:44 分类：问答
Moving the start position of canvas pattern

I have a code: function draw(ctx) { // create new image object to use as pattern var img = ne开发者_JS百科w Image();[详细]

2023-04-11 12:07 分类：问答
Filling a region with holes

I have a canvas yet drawn with a lot of things and now I want to fill a region defined as the whole canvas except for a few holes (my holes are complex shapes with arcs).[详细]

2023-04-11 04:24 分类：问答
Canvas strokeStyle not reliably changing?

Here\'s my code. For some reason it draws the lines in mostly grey. It would appear that some of the lines are being drawn with two stroke styles on top of each other, even though my draw calls don\[详细]

2023-04-11 03:42 分类：问答