Canon Kabushiki Kaisha

Albert Chang

Michael Gerard McCosker

Cameron Murray Edwards

Bin Liao

Scott Bradley

Shane Stephens

A method of modifying a font character. An outline of the font character is received, the outline being a vector representation of the character. A slant angle parameter to be applied to the font outline is received, the slant angle specifying an amount of shearing to be applied to the font outline. A modified stroke width is determined for each segment of the font outline according to an initial angle of the segment and the slant angle, the modified stroke width being proportional to ratio of a length of the segment before and after applying the slant angle to the outline. The modified stroke width is used for adjusting an initial stroke width of the segment to compensate for changes to stroke width of the segment caused by applying the slant angle. The font character is rendered using the modified stroke width of the segments.

Method, system and apparatus for modifying a font character

Methods, apparatuses, and computer readable storage media for increasing the weight of a character are described. In one aspect, the method includes receiving a vector character description and an emboldening parameter of an initial character. Vertices of an emboldened representation of the initial character are calculated by moving each vertex of the initial character based on a combination of the emboldening parameter and a stroke width for each vertex associated with the vertex, such that each stroke of the emboldened representation of the initial character is thickened based on the width of the stroke. The emboldened representation of the initial character are formed using the calculated vertices to increase the weight of the initial character.

Emboldening of outline fonts

A method of determining a coverage area of a pixel covered by a scalable path definition for a character, is disclosed. An edge direction for each edge of the scalable path definition intersecting the pixel is received. A fragment area is determined for each of the intersecting edges, each of the fragment areas representing an area of the pixel located to a side of a corresponding edge. The side of the corresponding edge is selected according to a direction of the corresponding edge. The coverage area of the pixel is determined based on a sum of the fragment areas, the sum of the fragment areas having a value greater than a total area of the pixel.

Method, system and apparatus for determining area of a pixel covered by a scalable definition for a character

A method determines a contribution of an object to an intensity value of a current pixel that is partially covered by the object by calculating an entry location and exit location for an edge of the object in the current pixel, the entry and exit locations being located on boundaries of the current pixel with different orientations. The method determines an intensity value for at least one neighboring pixel located adjacent to the current pixel, the neighboring pixel being selected based on the calculated entry and exit locations, and then determines an intensity value of the current pixel using the determined intensity value of the at least one neighboring pixel as a contribution of the object at the current pixel.

Text rendering method with improved clarity of corners

A method for providing an animated transition effect between a first display state associated with a first control state of a control element rendered on a graphical user interface of a computer system, and a second display state associated with a second control state of said control element is provided. The method renders the control element in said first state and then receives at the graphic user interface, a user input event to invoke the second control state of the control element. The method evaluates a graph associated with the control element, the graph having entries each corresponding to a state of the control element, each entry comprising an event, an associated transition and a destination state, to identify a graph entry specifying a transition invoked by the input event from a current displayed first state to the destination state, being the second control state. An entry is identified corresponding to the second control state as the current state of the control element and a description of an animation associated with the specified transition is retrieved. The animation is then rendered.

Animated user interface control elements

A method of compositing a plurality of graphic objects with a compositing buffer, is disclosed. The plurality of graphic objects forming a group is attenuated by group opacity and is composited from a top object to a bottom object. Based on a first mask and the group opacity, a second mask is generated. The first mask stores a remaining possible contribution for further graphic objects below and including the plurality of graphic objects. The plurality of graphic objects in a top down order is processed. In particular, for each graphic object of the plurality of graphic objects: (a) a contribution value for the graphic object using the second mask is determined, the contribution value representing a contribution of the graphic object to the compositing buffer; (b) a colour value of the graphic object is composited with the compositing buffer using the contribution value; and (c) the second mask is updated using the contribution value. The first mask is then updated using the second mask and the group opacity. The updated first mask is configured for further compositing of objects below the plurality of graphic objects.

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Lindfield, Australia

Albert Chang