Vector fill segment method and apparatus to reduce display latency of touch events

A system for generating a mask overlay for a display panel corresponding to a touch path on a touch panel, the system comprising,

• a control logic module configured to receive a vertex array comprising vertex points, and configured to generate a mask overlay based on the vertex array,
• wherein the control logic module comprises:
• an interpolation calculator configured to determine one or more polygons defining edges of the touch path based on the vertex points, and configured to generate start column offsets and stop column offsets respectively corresponding to start edges and stop edges of the one or more polygons at a row of pixels;
• a histogram module configured to receive the start and stop column offsets, and configured to generate a list of bin offset values based on the start and stop column offsets;
• and
• an accumulator and pixel-fill module configured to receive the list of bin offset values, configured to generate an accumulator value for each pixel of the row of the pixels based on the list of bin offset values, and configured to generate mask overlay based on the accumulator values.

A method of generating a mask overlay for a display panel corresponding to a touch path on a touch panel, the method comprising:

• generating polygons corresponding to a vertex array defining edges of the touch path;
• determining start edges and stop edges of the polygons for a row of pixels;
• generating bin offsets comprising values corresponding to the start edges and the stop edges;
• generating an accumulator value corresponding to each of the pixels based on the bin offsets;
• and
• generating the mask overlay comprising bits having values determined by whether a respective one of the accumulator values is greater than zero.