Dynamic rendering of ink strokes with transparency
First Claim
1. A computer-readable medium having stored thereon data representing sequences of instructions which, when executed by a processor, cause the processor to perform steps of a method for dynamically rendering a digital ink stroke, the method comprising the steps of:
- receiving a new pen tip instance;
determining a first region based on the new pen tip instance;
determining a second region based on a previous pen tip instance;
freezing a color of each of a plurality of pixels within an intersection of the first and second regions; and
painting the first region while the color of the pixels within the intersection is frozen, wherein said painting the first region comprises applying a new color setting to a plurality of pixels that are within a third region preceding the second region.
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Abstract
Apparatus and methods for dynamically rendering transparent ink strokes, in some situations such that the rendered ink stroke has transparency similar to physical ink while it is being drawn. For example, the ink stroke may be dynamically rendered as a stroke having uniform transparency while it is being drawn. Only the new ink segment that has most recently been added to the stroke may be drawn, and areas of the new ink segment that overlap older segments of the ink stroke may be frozen, or excluded from being re-painted.
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Citations
3 Claims
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1. A computer-readable medium having stored thereon data representing sequences of instructions which, when executed by a processor, cause the processor to perform steps of a method for dynamically rendering a digital ink stroke, the method comprising the steps of:
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receiving a new pen tip instance; determining a first region based on the new pen tip instance; determining a second region based on a previous pen tip instance; freezing a color of each of a plurality of pixels within an intersection of the first and second regions; and painting the first region while the color of the pixels within the intersection is frozen, wherein said painting the first region comprises applying a new color setting to a plurality of pixels that are within a third region preceding the second region. - View Dependent Claims (2, 3)
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Specification