An image generation device includes: a rasterizing portion generating, according string data, an element-blank image including a first element image indicating a first-type string element of a string and a blank image indicating a blank; an embedding portion identifying and embedding a second element image indicating a second-type string element of the string in the blank image; a first data storage portion in which a first data group used to generate the first element image is stored; and a second data storage portion in which a second data group including an image to be embedded as the second element image is stored. The rasterizing portion generates the first element image based on the first data group, and generates the blank image at a position where the second element image is to be embedded by identifying an embedding position of the second element image.

Various embodiments are disclosed that relate to electronic display of serially presented text using techniques for placement of an optimal recognition position of words at a fixed display location. In some embodiments, the optimal recognition position is based on empirically determined optimal recognition positions. In some embodiments, an optimal recognition position character is displayed at the fixed display location. In other embodiments, an optimal recognition proportionate position is displayed at the fixed display location. Various related techniques for processing and displaying text are further disclosed herein.

Various embodiments are disclosed that relate to electronic display of serially presented text using techniques for placement of an optimal recognition position of words at a fixed display location. In some embodiments, the optimal recognition position is based on empirically determined optimal recognition positions. In some embodiments, an optimal recognition position character is displayed at the fixed display location. In other embodiments, an optimal recognition proportionate position is displayed at the fixed display location. Various related techniques for processing and displaying text are further disclosed herein.

A display control device includes a storage configured to store invariant image data serving as a source of displaying an invariant portion of a display image to be displayed on a display; a data receiver configured to receive format designation data for designating a format of the display image and original data for generating variable image data serving as a source of displaying a variable portion of the display image; a variable image data generator configured to generate the variable image data from the original data; a buffer configured to store the invariant image data and the variable image data; an image data storage configured to select the invariant image data from the storage based on the format designation data to store the invariant image data in the buffer, and store, in the buffer, the variable image data generated by the variable image data generator; and a display controller configured to execute display processing for causing the display to display the display image based on the invariant image data stored in the buffer and the variable image data stored in the buffer.

Tools and techniques are described to render oversize glyphs in a monospace grid. Glyph rendering algorithms collect changed cells, collect affected cells based on overlap, clear certain affected cells, and redraw only specified cells. By reducing the number of cells whose glyphs are redrawn in response a text edit, algorithms permit faster execution even when rendering is done by a script rather than precompiled code. Algorithmic advances also permit faster display frame rates, and help preserve battery power. Grids may be numbered, and traversed, in different ways. Oversize glyphs may include underscores, ligatures, mathematical symbols, emojis, kanji, accented characters in various natural languages, and wide or tall text characters which extend beyond the display space of a single cell. Glyph rendering may provide user interface updates in browsers, shells, terminal emulators, and other programs.

Acquisition of a font portion using a compression mechanism is described. In certain embodiments, an end-user device determines multiple characters to be displayed but are missing from a local font. The end-user device computes a compressed representation of the multiple characters based on multiple code points corresponding to the multiple characters. The end-user device transmits a font request including the compressed representation to a font repository. The font request may be implemented as a uniform resource locator (URL). The font repository, such as a server, decodes the compressed representation to identify at least the multiple code points encoded by the end-user device. The font repository prepares a font description including glyph data corresponding to the multiple code points and returns the font description. The end-user device produces a local font that includes at least multiple glyphs corresponding to the multiple requested characters. The local font production may include font augmentation.

Acquisition of a font portion using a compression mechanism is described. In certain embodiments, an end-user device determines multiple characters to be displayed but are missing from a local font. The end-user device computes a compressed representation of the multiple characters based on multiple code points corresponding to the multiple characters. The end-user device transmits a font request including the compressed representation to a font repository. The font request may be implemented as a uniform resource locator (URL). The font repository, such as a server, decodes the compressed representation to identify at least the multiple code points encoded by the end-user device. The font repository prepares a font description including glyph data corresponding to the multiple code points and returns the font description. The end-user device produces a local font that includes at least multiple glyphs corresponding to the multiple requested characters. The local font production may include font augmentation.

Tools and techniques are described to render oversize glyphs in a monospace grid. Glyph rendering algorithms collect changed cells, collect affected cells based on overlap, clear certain affected cells, and redraw only specified cells. By reducing the number of cells whose glyphs are redrawn in response a text edit, algorithms permit faster execution even when rendering is done by a script rather than precompiled code. Algorithmic advances also permit faster display frame rates, and help preserve battery power. Grids may be numbered, and traversed, in different ways. Oversize glyphs may include underscores, ligatures, mathematical symbols, emojis, kanji, accented characters in various natural languages, and wide or tall text characters which extend beyond the display space of a single cell. Glyph rendering may provide user interface updates in browsers, shells, terminal emulators, and other programs.

An input display device includes: a processor to execute a program; and a memory to store the program which, when executed by the processor, results in performance of steps including: acquiring a character string; receiving a touch drawing operation; detecting a state of the touch drawing operation; generating a track image showing the track, the track image having a line width corresponding to the state of the touch drawing operation; displaying the generated track image on a display; and superimposing the acquired character string on the displayed track image in accordance with a character size corresponding to the line width of the track image.

An input display device includes: a processor to execute a program; and a memory to store the program which, when executed by the processor, results in performance of steps including: acquiring a character string; receiving a touch drawing operation; detecting a state of the touch drawing operation; generating a track image showing the track, the track image having a line width corresponding to the state of the touch drawing operation; displaying the generated track image on a display; and superimposing the acquired character string on the displayed track image in accordance with a character size corresponding to the line width of the track image.