JP2015210417A - Information processing device, control method thereof, computer program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a character string display environment having the sense of unity even when the used font differs depending on a character string.SOLUTION: An information processing device 100 according to the present invention comprises: a character string acquisition unit 111 capable of drawing a character string using a plurality of fonts and acquiring information indicating the character string displayed on a display screen; a language information acquisition unit 119 for acquiring the language information that is set in the information processing device; a font determination unit 112 for determining the font, among the plurality of fonts, that is used for drawing each of characters included in the character string displayed on the display screen; a drawing position determination unit 116 for determining, on the basis of the attribute information of the front corresponding to the acquired language information and the attribute information of the determined font among the plurality of fonts, a drawing position at which the character string is drawn; and a drawing control unit 117 for drawing the character string in accordance with the determined drawing position.

Description

  The present invention relates to a technique for drawing characters using font data.

  To display characters on the display screen of the device, the font type, display position, size, etc. are specified, the shape information corresponding to the characters to be displayed is obtained from the font data, and the specified display position and size are displayed. The image drawn so as to match the size is output to the display screen.

  In general, when characters are arranged and displayed as a character string, it is desirable that the characters be drawn so that the baselines of the characters are aligned. A baseline is a virtual line that serves as a reference for aligning character strings. In the case of a bitmap font in which each character is prepared as an image (image data) of the same size, it is designed so that the baseline is aligned only by arranging the character images like tiles. However, in order to reduce the overall data size of the font, the size of the image may differ from character to character. Therefore, in Patent Document 1, by maintaining information on the width above and below the base line for each character image, even a character string in which umlaut characters and characters that protrude below the base line are mixed, A method has been proposed in which the baselines are aligned and displayed.

  In addition, when a plurality of fonts are used for one character string, the positions of the baselines and the heights of the characters designed for each font are different, so that they may appear to be shifted when drawn side by side. Therefore, in Patent Document 2, it is detected that the input character string includes a Japanese document body and a European document body, and the Japanese document body is based on the widths of the upper and lower ends of the character after bitmap expansion of the European characters. A method has been proposed in which the baseline is aligned by changing the height of the image.

JP 2000-267645 A JP 2007-72576 A

However, conventionally, there has been a problem that the position of the set baseline is changed for each character area, for each screen, or for each line, and the sense of unity may be lost.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a character string display environment with a sense of unity even when fonts used by character strings are different.

In order to solve the above-described problem, an information processing apparatus according to the present invention is capable of drawing a character string using a plurality of fonts, and a character string acquisition unit that acquires information indicating a character string to be displayed on a display screen; Linguistic information acquisition means for acquiring linguistic information set in the information processing apparatus;
Of the plurality of fonts, a font determination unit that determines a font used for drawing each character included in a character string to be displayed on the display screen; and the language information acquisition unit among the plurality of fonts is acquired by the language information acquisition unit. A drawing position determining means for determining a drawing position for drawing the character string, based on the font attribute information corresponding to the language information and the font attribute information determined by the font determining means; and the drawing position determination. In accordance with the drawing position determined by the means, a drawing means for drawing each character of the character string indicated by the information acquired by the character string acquisition means using the font determined by the font determination means.

  According to the present invention, it is possible to provide a character string display environment with a sense of unity even when fonts used by character strings are different.

A block diagram showing an example of a hardware configuration and a functional configuration of the present embodiment Diagram showing details of characters drawn using font data A flowchart showing an example of a flow of processing for drawing a character string The flowchart which shows the example of the flow of the process which acquires the shape information of a character The flowchart which shows the example of the flow of the process which determines the drawing position of a character The figure which showed an example of the drawing result of the character string by this embodiment The flowchart which shows the example of the flow of the process which determines the drawing position of a character The flowchart which shows the example of the flow of the process which determines the drawing position of a character Figure showing an example of attribute information for a font with a large ascend width The figure which showed an example of the function structure of the information processing apparatus in a modification The figure which showed an example of the drawing result of the character by the conventional method The figure which showed an example of the drawing result of the character by the conventional method

  Embodiments of the present invention will be described below with reference to the drawings. The following embodiments do not limit the present invention related to the scope of claims, and all combinations of features described in the present embodiments are essential to the solution means of the present invention. Not necessarily. In addition, about the same structure, the same code | symbol is attached | subjected and demonstrated.

<First Embodiment>
In the first embodiment, when a character string can be drawn with a plurality of fonts, the position on the display screen for drawing the character string is set to at least one of a designated font and a font that is considered to be used frequently. It is determined based on information of one or more fonts.

  The configuration of the information processing apparatus 100 according to the present embodiment will be described with reference to FIG. FIG. 1A is a diagram illustrating a hardware configuration of the information processing apparatus 100. The CPU 101 is a system control unit and controls each unit connected via the system bus 107. The ROM 102 is a read-only memory that stores programs and parameters that do not need to be changed. The RAM 103 is a rewritable memory that temporarily stores programs and data supplied from an external device. The drawing processing unit 104 is a GUP (Graphics Processing Unit) or the like, and outputs graphics drawn by a program. A display unit 105 that is an interface with a monitor or a projector for displaying graphics or a user interface drawn by the drawing processing unit 104 may be added to the configuration. In addition, an input unit 106 such as a keyboard or a touch panel may be added to the configuration as an input of a character string to be drawn by the drawing processing unit 104. The storage unit 108 is a hard disk drive or an external storage device connected via a network, and stores various data according to the present embodiment. In addition to the ROM 102, there are the following in addition to the ROM 102 as a storage medium for supplying program code to the configuration described. For example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, memory card, DVD, and the like may be added to the configuration of the information processing apparatus of this embodiment.

  FIG. 1B is a diagram illustrating a functional configuration of the information processing apparatus 100 according to the present embodiment. Each functional unit is realized by the CPU 101 developing a program stored in the ROM 102 in the RAM 103 and executing processing according to each flowchart described later. In addition, for example, when configuring hardware as an alternative to software processing using the CPU 101, it is only necessary to configure arithmetic units and circuits corresponding to the processing of each functional unit described here.

  The character string acquisition unit 111 acquires information indicating a character string to be drawn on the display screen. As the character string to be drawn, a predetermined word may be stored in the ROM 102 or the like, or an arbitrary word inputted by an operation from a user using an input device such as a keyboard, a touch panel, or a microphone. The priority order acquisition unit 118 acquires information regarding a predetermined priority order for at least some of the plurality of fonts that can be drawn by the information processing apparatus 100. This priority order is a priority order of fonts designated in advance to be preferentially used when displaying character information on the display screen. The font determining unit 112 determines which font to use from one or more font data stored in advance in the ROM 102 or the storage unit 108 in order to draw each character constituting the character string. At this time, the font to be used is determined based on the priority order acquired by the priority order acquisition unit 118.

  The attribute information acquisition unit 113 acquires font attribute information from the font data. The attribute information is metric information unique to the font stored in the font data, and includes, for example, UnitsPerEm, ascend width, descend width, and maximum feed width of stored characters. Explanation of each term will be described later using a specific example. The shape information acquisition unit 114 acquires shape information corresponding to each character constituting the character string from the font data determined by the font determination unit 112. The shape information includes a character drawing result in an image format and a character outline (outline) in a vector format, but the shape information format is not limited. The reference position acquisition unit 115 acquires position information serving as a reference for determining the drawing position of the character string. The position information is determined in advance and can be read from the ROM 102 or the like. Moreover, it can acquire via an input device by a user's operation. The language information acquisition unit 119 acquires the language information specified by setting the language for the character string to be displayed. The language information specified in the language setting is information indicating which language is used to display the character information displayed on the display screen. In this embodiment, initial values are set in advance in the device design stage. Assuming that However, the language setting may be changed at an arbitrary timing by the operator. Moreover, it is good also as a structure which acquires language information by acquiring the present position information of an apparatus with a GPS (Global Positioning System) sensor, and referring the matching information of position information and an official language.

  The drawing position determination unit 116 determines the drawing position of the character string based on the reference position acquired by the reference position acquisition unit 115 and the attribute information acquired by the attribute information acquisition unit 113. At this time, in the usage environment of the information processing apparatus 100, the drawing position is determined according to attribute information of one or more fonts that are considered to be frequently used for character drawing. In the first embodiment, the drawing position is determined according to the attribute information of the font specified by the language information acquired by the language information acquisition unit 119. The drawing control unit 117 draws the character at the position determined by the drawing position determination unit 116 based on the character shape information acquired by the shape information acquisition unit 114. Although it is assumed that the drawing result by the drawing control unit 117 is transferred to a display unit such as a display for display, the output device is not limited.

  First, the details of characters drawn using font data will be described with reference to FIG. On the display screen of the device, a character string is superimposed and displayed on a part 201 imitating a button as shown in FIG. 2A or a rectangle 202 surrounding a character string editing area as shown in FIG. Sometimes. At this time, the coordinates indicating the display position of the character string are often specified on the basis of the coordinates relating to the component or rectangle in order to avoid the character string protruding from the component 201 or the rectangle 202. Here, the upper left coordinate of the part or rectangle on which the character string is superimposed is set as a reference position for displaying the character string. In FIG. 2A, the upper left position 203 of the component 201 is the reference position, and in FIG. 2B, the coordinates of the upper left 204 of the rectangle 202 are the reference position. Next, the attribute information of the font data will be specifically described with reference to FIG. FIG. 2C is an image of shape information “p”, “date”, and “3” stored in three different font data of alphabet font, kanji font, and numeric font from the left. The format of the shape information may be an outline format or an image format. One of the font attribute information is UnitsPerEm. In this case, a square whose side is the size of a type is a unit of relative length in typesetting, and em is a unit that defines a length per em. The width 222 shown in FIG. 2C is UnitsPerEm, and the UnitsPerEm of the three types of fonts shown in FIG. The baseline is a virtual line that serves as a reference for aligning character strings. In FIG. 2C, lines 211, 214, and 217 indicate the baseline of each font. A line 220 is an ascender line indicating the upper end of the character, and a line 221 is a descender line indicating the lower end of the character. The height from the base line to the ascender line is called the ascend width, and the height from the base line to the descender line is called the descend width. In general, there are many fonts whose UnitsPerEm is the sum of the ascend width and the descend width. In FIG. 2C, the widths 212, 215, and 218 indicate the ascender widths of the respective fonts, and the widths 213, 216, and 219 indicate the descender widths.

  Here, for comparison with the present embodiment, details of the problem solved by the present embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 shows a state in which the character strings “Jp” and “Jp Japan” are drawn using the alphabet font and the kanji font shown in FIG. 2C for each character type. Assuming that the upper left coordinate of the part or rectangular area as shown in FIG. 2A or 2B is designated as the reference position 1101, a plurality of characters are arranged so that the ascender lines are aligned. On the left in FIG. 11A, an ascender line of an alphabet font is aligned with the y coordinate of the reference position 1101. Therefore, the character string “Jp” is drawn so that the base line position 1102 comes to a position to be shifted downward from the reference position 1101 by the ascending width 212 of the alphabet font. On the other hand, the right side of FIG. 11A shows the character string “Japan” in the kanji state while maintaining the baseline position 1102 determined based on the alphabet font design when the character string “Jp” is drawn. Indicates the result of drawing in font. Since the kanji font has a wider ascending width than the alphabet font, the kanji may exceed the y coordinate of the reference position 1101. That is, the part 201 or the rectangle 202 may be protruded.

  Therefore, conventionally, when a plurality of fonts are used for character string drawing, a method of determining and drawing a baseline position with the widest ascend width among the fonts actually used may be used. is there. FIG. 11B shows the result of drawing using this method. The left base line position 1103 in FIG. 11B is a position based on the ascending width of the alphabet font, and the right base line position 1104 in FIG. 11B is a drawing position based on a kanji font having a wider ascending width than the alphabet font. It is. In this method, the baseline position is shifted by a width 1105 between the character strings “Jp” and “Jp Japan”. That is, for example, the base line position is different between a component in which a character string composed only of alphabet fonts is arranged and a component in which a character string composed of alphabet fonts and kanji fonts is arranged. Therefore, when the images are displayed side by side, the sense of unity of appearance is impaired. Furthermore, in order to solve this problem, conventionally, there has been a concept of taking into consideration all fonts that may be used in character string drawing and determining the baseline position with the widest ascend width among them. . FIG. 11C shows a drawing result when this method is used. In both the character strings “Jp” and “Jp Japan”, the base line position is determined by the character string to be drawn because the base line position is determined by the kanji font having a large ascend width. Here, as a method of considering all fonts that may be used, it is possible to consider pre-registered fonts or all fonts stored in the apparatus. For example, a technique called a font list can be used. Here, the font list will be described. Information on all characters to be input is not necessarily stored in one font data. Therefore, when a character that is not stored in the font data is input, the character is replaced with a substitute character (Missing-Glyph), so that a desired character string cannot be displayed correctly. Therefore, priorities to be used are set in advance for a plurality of fonts, and characters that are not stored in the font data with the highest priority are replaced with drawing using the font data with the next highest priority. In this way, the technique for reducing the phenomenon of substitution with substitute characters is called a font list because a plurality of font data is managed as a list. Therefore, all of the plurality of fonts specified as the font list can be regarded as all the fonts that may be used in drawing the character string.

  However, this method also has problems. This will be described with reference to FIG. In both the left and right character strings in FIG. 12, the reference position 1201 for drawing the character string “eg” has the same coordinates, but the left side of FIG. 12 determines the baseline position in consideration of only the alphabet font, and the character string “eg” "Is the result of drawing. On the other hand, the right side of FIG. 12 assumes that the font list is set in the order of alphabet fonts, kanji fonts, and numeric fonts in the order of priority of fonts to be used, as described in FIG. 11C. This is the result of drawing with the line position determined. The character string “eg” to be drawn does not include characters that use a font having a larger ascending width than the alphabet, but in FIG. 12B, the baseline position is low because of the possibility of use. The position is fixed. Therefore, the baseline position 1203 on the right in FIG. 12 is lower than the baseline position 1202 on the left in FIG. In this way, even if there is a possibility of use, if a baseline is determined in consideration of a font that is not actually used, there is more blank space than necessary in the space 1204 at the top of the character string as shown in the right of FIG. May feel like. As described above, if a font having a low use frequency and a wide ascend width is taken into consideration, there are cases where the blank area increases and the drawing area cannot be used effectively.

  In order to solve the conventional problems as described above, in the present embodiment, a baseline is considered in consideration of an input character string, font information in which priority to be used is determined in advance, and language information specified by the user. Specifies the font used as the reference for The processing flow of this embodiment will be described with reference to FIGS. 3, 4, and 5.

  FIG. 3 shows an example of the processing flow of character string drawing of this embodiment. In the present embodiment, the flowchart of FIG. 3 is started in response to activation of the power supply of the apparatus or execution of a specific application to start drawing processing of an image displayed on the display screen. In the present embodiment, it is assumed that a plurality of fonts having priorities are specified for an input character string by the font list technique described above.

  In step S301, the character string acquisition unit 111 acquires information indicating a character string to be drawn. For example, by analyzing screen information (for example, a structured document) stored in the ROM 102 or the storage unit 108, a character code indicating each character of the character string to be drawn is acquired. Alternatively, information is acquired by acquiring and analyzing a user instruction from an input device such as a keyboard or a touch panel. Next, in step S302, the priority level acquisition unit 118 acquires priority level information of fonts that may be used. In this embodiment, the priority is set in the form of a font list for at least one font. In step S303, the reference position acquisition unit 115 acquires a reference position for determining the drawing position of the character string acquired in step S301. In the present embodiment, the upper left coordinate of the display area of the character string is acquired as the reference position. However, the reference position is not limited to the upper left coordinate of the area. Any coordinates may be used as long as the drawing position of the character string is uniquely determined by referring to the reference position and the attribute information of the font. The drawing position in the present embodiment is a baseline position of a character string to be drawn. In step S304, the drawing position determination unit 116 determines the drawing position of the character string based on the attribute information regarding at least one font among the fonts included in the priority order information. In the case of this embodiment, the position of the baseline serving as a reference for arranging the character string is determined as the drawing position. In the present embodiment, as the at least one font for which attribute information is considered in step S304, a font that is frequently used for drawing a character string is selected in the usage environment of the information processing apparatus 100. In the first embodiment, an example will be described in which the baseline is determined in consideration of the ascending width of the font associated with the language set in the language setting. Detailed contents of the processing executed in step S304 of the first embodiment will be described later with reference to FIG.

  In step S305, the shape information acquisition unit 114 sets the first character as the current character among the information on each character of the character string acquired in step S301. That is, the character code indicating the first character is stored in the RAM 103 as information indicating the target character of the current process. In step S306, the shape information acquisition unit 114 acquires the shape information corresponding to the current character from the font included in the priority order information. In the font data handled in this embodiment, it is assumed that outline format data associated with a character code is stored as shape information. However, the shape information may be an image format. Details of the processing for acquiring shape information from the font in step S306 will be described later. In step S307, the drawing control unit 117 draws a character at the drawing position determined in step S304 based on the shape information corresponding to the current character. In step S308, the shape information acquisition unit 114 determines whether drawing processing has been completed for all characters included in the character string. If it is determined that all characters have been processed (YES in step S308), the process ends. On the other hand, if it is determined that all characters have been processed (YES in step S308), that is, if unprocessed characters remain in the acquired character string, the process proceeds to step S309. In step S309, the shape information acquisition unit 114 sets the next character as the current character, and the process proceeds to step S306. Then, the processes from step S306 to step S309 are repeated until all the characters included in the character string are processed.

  In this embodiment, even if one or more independent character strings exist, such as when there are a plurality of parts on which a character string is drawn, as the components of the image displayed on the screen, the characters of all the elements in step S301 The column information is acquired, and subsequent drawing processing is performed. As a result, even on a screen including one or more independent character strings in one screen, characters are drawn along a uniform drawing position, so that the appearance of each character string is reduced while reducing the processing load. Unity can be improved. Furthermore, in the present embodiment, when it is necessary to redraw a part of the displayed image after finishing the drawing process in response to a user operation or the like, the part shown in FIG. It is assumed that the process of the flowchart is executed. However, when the processing of the flowchart of FIG. 3 is performed for each of one or more independent character strings, the same drawing position is determined each time step S304 is executed, so the visual uniformity of each character string is improved. Can be made.

  Next, the detailed flow of the character shape information acquisition process executed in step S306 will be described with reference to the flowchart of FIG. In the present embodiment, it is assumed that at least one font is included in the priority order information. In the following, assuming that a TrueType outline font is assumed as an example of the font handled in the present embodiment, processing will be described using terms derived from the TrueType font. However, the font to be used is not limited to this.

  In step S401, the font determining unit 112 uses the current font defined to be used with the highest priority among the priority order information acquired in step S302 (which is the target of the rendering process at that time). Set to font. In step S <b> 402, the font determination unit 112 acquires a glyph index corresponding to the current character from the font data of the current font among the font data of one or more fonts stored in the ROM 102 or the storage unit 108. The glyph index is identification information for mapping the shape information of each character and the character code stored in the font data. Hereinafter, the glyph index is expressed as GID. The font determination unit 112 acquires a non-zero GID if the shape information corresponding to the current character of this embodiment is stored in the current font, and returns 0 if there is no corresponding shape information. In TrueType fonts, the shape information with GID mapped to 0 is called a substitute character (Missing-Glyph). For characters for which there is no corresponding shape information, the shape information of this substitute character is acquired. It is a mechanism to be done. In step S403, the font determination unit 112 determines whether or not the GID is 0. If it is determined that the GID is not 0 (NO in step S403), shape information corresponding to the current character is stored in the font data of the current font. Therefore, the font determination unit 112 can determine the current font as the font used to draw the current character. In this case, in step S404, the shape information acquisition unit 114 acquires the shape information of the character corresponding to the GID.

  On the other hand, if it is determined in step S403 that GID is 0 (YES in step S403), the process proceeds to step S405. In step S405, the font determination unit 112 determines whether or not a priority font next to the current font is set in the priority order information acquired in step S302. If it is determined that the next priority font is set after the current font (YES in step S405), the process proceeds to step S406. In step S406, the font determination unit 112 sets the next priority font after the current font as the current font, and the process proceeds to step S402. Then, the processing from step S402 to step S406 is repeated until there is no font included in the priority information or a non-zero GID can be acquired. On the other hand, if it is determined that the next priority font after the current font is not set (NO in step S405), the process proceeds to step S407, and the font determination unit 112 is defined by the priority information. Set the highest priority font to the current font. In this case, in step S404, the font determination unit 112 acquires the substitute character shape information as the shape information corresponding to GID of 0, and ends the process.

  Next, the flow of processing for determining the drawing position executed in step S304 in FIG. 3 will be described with reference to the flowchart in FIG. In step S501, the drawing position determination unit 116 initializes a variable Cur indicating the current ascending width to zero. Next, in step S502, the language information acquisition unit 119 acquires language information for the character string to be drawn. In the information processing apparatus 100 of the present embodiment, the language representing the character information on the display screen of the device can be set as the language setting by the operator or the like. The language information acquisition unit 119 acquires language information indicating English, Japanese, Arabic, and the like. In step S503, the language information acquisition unit 119 determines whether there is a font including shape information corresponding to the representative character of the acquired language information among the fonts included in the priority order information acquired in step S302. In this embodiment, as an example, representative characters of each language are determined according to code points classified by ISO / IEC 8859, which is an 8-bit character code standard intended for use in computers. Then, the shape information corresponding to the representative character is searched from the fonts included in the priority information, and if it is found, it is determined that there is a font including the shape information of the representative characters of the language information. If it is determined that there is a font including shape information of the representative character of the acquired language information among the fonts included in the priority order information (YES in step S503), the process proceeds to step S504. In step S504, the attribute information acquisition unit 113 acquires font attribute information including the representative characters of the acquired language information, and sets the ascend width to Cur. On the other hand, if it is determined that there is no font that includes the shape information of the representative characters of the acquired language information among the fonts included in the priority order information (NO in step S503), the process of step S504 is omitted and the process is performed. Advances to step S505.

  In step S505, the drawing position determination unit 116 sets the font defined with the highest priority in the priority order information as the current font. In step S506, the drawing position determination unit 116 determines whether or not the current font is actually used for drawing the character string acquired in step S301 of FIG. Specifically, based on the character code acquired in step S301, it is determined whether or not shape information corresponding to the character code is stored in the font data of the current font. If even one character of the acquired character string has the corresponding shape information stored in the current font, it is determined that the current font is actually used. If it is determined that the current font is not actually used (NO in step S506), the process proceeds to step S507. If it is determined that the current font is actually used (YES in step S506), the process proceeds to step S508. In step S508, the attribute information acquisition unit 113 acquires the ascend width of the current font. In step S509, the drawing position determination unit 116 determines whether or not the acquired ascend width is larger than the value set in Cur. If it is determined that the ascending width is larger than the value set in Cur (YES in step S509), the process proceeds to step S510. If it is determined that the ascend width is smaller than the value set in Cur (NO in step S509), the process proceeds to step S507. In step S510, the attribute information acquisition unit 113 sets the ascend width acquired in step S508 to Cur, and the process proceeds to step S507.

  In step S507, the drawing position determination unit 116 determines whether or not there is a font setting prioritized next to the current font in the priority order information acquired in step S302. If it is determined that there is a font setting prioritized next to the current font (YES in step S507), the process proceeds to step S512. In step S512, the font that is prioritized after the current font is set to the current font, and the process returns to step S506. Then, the processing from step S506 to step S512 is repeated until there is no next priority font. On the other hand, if it is determined that there is no setting of a font to be prioritized next to the current font (NO in step S507), the process proceeds to step S511. In step S511, the drawing position determination unit 116 determines the baseline position based on the value of Cur and ends the process. In the present embodiment, the drawing position determination unit 116 determines that the position of the baseline is a position obtained by shifting the y coordinate downward from the upper left coordinates of the character string drawing area, which is the reference position, by the value of Cur toward the character. To do.

  With the above processing, in this embodiment, even if the predetermined priority is high, fonts that are not used in the input character string are not considered in the processing for determining the baseline. On the other hand, among the prioritized fonts, the font ascending width according to the language information used by the user is considered in the process of determining the baseline regardless of whether the font is used or not. . Since the language specified in the language setting is a language instructed to be used for displaying character information, it can be considered that the frequency of use is high on the screen displayed on the device. Therefore, even if the currently drawn image does not include characters in the set language, if part or all of the image displayed on the display screen is updated due to, for example, screen transition, the Language characters are likely to be displayed. Therefore, in the present embodiment, the ascending width of the font in accordance with the language information used by the user among the fonts given priority is always considered in determining the character drawing position. Thereby, before and after updating the display screen, it is possible to give a sense of unity to the appearance without causing an extreme difference in the baseline of the character string.

  The difference in the drawing result between the case where this embodiment is applied and the case where the conventional method is used is shown by comparison between FIG. 12 and FIG. In drawing the character strings “Jp” and “Jp Japan”, priorities are set in the order of English font, Japanese font, and Arabic font, and these UnitsPerEm values are all set to 1024. Assume that the ascending width and descending width of the English font are 624px and 400px, 750px and 274px for the Japanese font, and 924px and 100px for the Arabic font. The coordinates of the reference position 601 are (0, 0), the language setting is Japanese, and the font size is 1024 px. FIG. 12B is a drawing result when the baseline position is determined in consideration of the attribute information of all fonts included in the priority order information regardless of the presence or absence of use according to the conventional method. This is a state corresponding to the left state of 12 (a). The character string to be drawn does not include Arabic, but the baseline position is determined by the Arabic font having the largest ascend width, and therefore the baseline position is 924 px below the reference position. Therefore, the upper part of the character string looks a little empty. FIG. 12C shows the rendering result when the baseline position is determined by the attribute information of the font actually used in the input character string among the fonts included in the priority order information in accordance with the conventional method. It is. Since the font to be used is different depending on the character string to be drawn, the baseline position is also different. As described above, in the usage environment assumed here, the user sets the language setting to Japanese. Therefore, even if a character string that does not include a Japanese document such as “Jp” is input, its surroundings, etc. It is highly likely that a character string including a Japanese document is placed in. In that case, the sense of unity will be impaired.

  In contrast to such a conventional example, FIG. 6 shows an example of a result rendered by the processing shown in the flowchart of FIG. 5 according to the present embodiment. The baseline is determined taking into account at least the ascend width of Japanese fonts having shape information for code points assigned to JIS X 0208, which is a Japanese industrial standard that mainly defines a 2-byte encoded character set for information exchange. Therefore, even if Japanese characters are not included as in the character string “Jp”, the base line position takes into account the ascending width of the Japanese font, so when a character string including a Japanese document is placed. Does not impair unity. Although the base line is changed only when drawing of a character string of an Arabic character that is used infrequently is instructed, the base line position is aligned in most cases, and no extra space above the character string is generated.

  As described above, in the present embodiment, the font corresponding to the character actually used for the input character string and the font corresponding to the language setting estimated to be frequently input are considered. Determine the baseline.

<Modification 1>
In the first embodiment, in order to determine a character drawing position, at least one or more fonts that are used to draw a character string that refers to attribute information and is considered to be frequently used are specified by language setting. The font associated with the language was selected. On the other hand, as a first modification, an example will be described in which a predetermined number (a predetermined number is a plurality) of high-priority fonts is selected from among a plurality of fonts that are determined to be prioritized in advance.

  Since the hardware configuration of the information processing apparatus 100 according to the first modification conforms to FIG. 1A described in the first embodiment, detailed description thereof is omitted. A functional configuration of the information processing apparatus 100 according to the first modification is illustrated in FIG. However, functional units that are the same as those in FIG. 1B of the first embodiment are given the same numbers, and descriptions thereof are omitted. A font number acquisition unit 1001 realized by software processing of the CPU 101 acquires the number of fonts to be considered for determining the drawing position of the character string. In this embodiment, the number of fonts is predetermined and stored in the ROM 102. The drawing position determination unit 116 determines the drawing position based on attribute information of a plurality of fonts having a high priority up to the number of fonts.

  Also in the modification 1, the process of drawing a character is performed according to the flowchart of FIG. However, the process of determining the drawing position in step S304 follows the flowchart of FIG. In FIG. 7, processes with the same step numbers as in FIG. 5 are the same as those in the flowchart of FIG.

  In step S701, the font number acquisition unit 1001 acquires the font number N for determining the drawing position. In the present embodiment, the drawing position is determined by the Nth font counted from the fonts with the highest priority. In step S702, the attribute information acquisition unit 113 acquires the largest value of the ascending widths of the Nth fonts and sets them to Cur. Drawing when the present embodiment is applied when the character string to be drawn, the priority order of fonts to be used, and the coordinates of the reference position described in FIG. The result is the same as in FIG. This embodiment is useful when most of the character strings to be drawn can be covered with the fonts having the specified priority order.

  As a result of the above processing, in Modification 1, the highest ascending width of one or more high-priority fonts among the prioritized fonts is used regardless of whether the font is used or not. Is considered in the process of determining. Of the fonts that have been given priority in advance, those with higher priority can be regarded as being particularly likely to be used. By determining the drawing position according to the font with the largest ascend width, even if drawing using any of the higher priority fonts, there will be no significant difference in the baseline of the string, and the appearance will be Can have a sense of unity.

<Modification 2>
In the first embodiment and the first modification thereof, an example has been described in which a font that must be considered in order to determine a character drawing position is determined. On the other hand, as a second modification of the first embodiment, an example will be described in which a font to be excluded is specified from at least one or more fonts used for determining a character drawing position.

  Since the hardware configuration of the information processing apparatus 100 according to the modification 2 is also similar to that of FIG. 1A described in the first embodiment, detailed description thereof is omitted. A functional configuration of the information processing apparatus 100 according to Modification 2 is illustrated in FIG. However, functional units that are the same as those in FIG. 1B of the first embodiment are given the same numbers, and descriptions thereof are omitted. The attribute information determination unit 1002 determines whether the attribute information acquired by the attribute information acquisition unit 113 satisfies a predetermined condition. Although the determination condition will be described later, whether or not the attribute information is used for the process of determining the drawing position by the drawing position determination unit 116 is determined according to the determination result.

  Also in the modification 1, the process of drawing a character is performed according to the flowchart of FIG. However, the process of determining the drawing position in step S304 follows the flowchart of FIG. In FIG. 8, the processes with the same step numbers as those in FIGS. 5 and 7 are the same as the steps with the same numbers described above, and thus the description thereof is omitted here.

  In the second modification, when it is determined in step S509 that the ascend width of the current font is larger than Cur, in step S801, the attribute information determination unit 1002 determines whether or not the ascend width satisfies a predetermined condition. To do.

  The predetermined conditions used for this determination process will be described with reference to FIG. FIG. 9 is an image of the shape information of the character having the maximum height (here, “そ の”) among the characters stored in the font for one of the fonts included in the priority information. It is. Line 901 represents a base line, line 902 represents an ascender line, and line 903 represents a descender line. Character shape information varies greatly depending on the font designer who designs it. For example, it is assumed that the font unit PersEm is 1024 px and the ascend width and the descend width are 924 px and 100 px, respectively. However, even if the maximum height of the designed character shape is only 400 px as shown in FIG. 9 and the space up to the ascender line 1302 is large, the validity of the font itself is not impaired. In the present embodiment, as the predetermined condition in step S801, the ascend width designed for the font is higher than the height value of the character with the maximum height among the characters stored in the font. It is determined whether it is larger than the threshold value. It is determined whether the absolute value of the difference between the ascending width and the height value of the character having the maximum height is greater than a predetermined threshold. When the difference is larger than a predetermined threshold, the ascend width is regarded as not an appropriate font ascend width for determining the drawing position, and is not considered in determining the baseline. Note that the predetermined threshold value may be designated in advance by the user or the designer of the image to be displayed on the display screen.

  If it is determined in step S801 that the ascend width does not satisfy the condition (NO in step S801), the process proceeds to step S507. If it is determined that the condition is satisfied (YES in step S801), step S802 is performed. Proceed to In step S802, the attribute information acquisition unit 113 sets the ascending width of the current font to Cur, and the process proceeds to step S507. The subsequent processing is omitted because it overlaps with the description in FIG. As an example of the predetermined condition, the example in which the threshold value is provided from the relationship between the maximum height of the character shape stored in the font and the ascend width has been described, but the determination may be made based on other conditions.

  Note that Modification 2 can be combined with the first embodiment or Modification 1 thereof. That is, if the determination in step S509 is YES in the flowchart of FIG. 5 of the first embodiment or the flowchart of FIG. 7 of the modification, step S801 may be executed before the process of step S510.

<Other embodiments>
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

DESCRIPTION OF SYMBOLS 111 Character string acquisition part 112 Font determination part 113 Attribute information acquisition part 114 Shape information acquisition part 115 Reference position acquisition part 116 Drawing position determination part 117 Drawing processing part 118 Priority acquisition part 119 Language information acquisition part 1001 Font number acquisition part 1002 Attributes Information judgment unit

Claims (12)

An information processing apparatus capable of drawing a character string using a plurality of fonts,
A character string acquisition means for acquiring information indicating a character string to be displayed on the display screen;
Language information acquisition means for acquiring language information set in the information processing apparatus;
Font determining means for determining a font to be used for drawing each character included in the character string to be displayed on the display screen among the plurality of fonts;
The character string is drawn based on the attribute information of the font corresponding to the language information acquired by the language information acquisition unit and the attribute information of the font determined by the font determination unit among the plurality of fonts. Drawing position determining means for determining the drawing position;
A drawing unit that draws each character of the character string indicated by the information acquired by the character string acquisition unit using the font determined by the font determination unit according to the drawing position determined by the drawing position determination unit. An information processing apparatus comprising:   The drawing position determination unit is a font that stores shape information of a representative character of the language indicated by the language information acquired by the language information acquisition unit as a font corresponding to the language information acquired by the language information acquisition unit. And determining a baseline for drawing the character string based on a maximum ascending width among the ascending width of the specified font and the ascending width of the font determined by the font determining unit. The information processing apparatus according to claim 1. A priority order acquisition means for acquiring a predetermined priority order for each of at least some of the plurality of fonts;
3. The font determination unit according to claim 1, wherein the font determination unit determines a font to be used for rendering each character included in the character string based on the priority order acquired by the priority order acquisition unit. Information processing device. An information processing apparatus capable of drawing a character string using a plurality of fonts,
A character string acquisition means for acquiring information indicating a character string to be displayed on the display screen;
Priority order obtaining means for obtaining a predetermined priority order for each of at least some of the plurality of fonts;
Font determining means for determining a font to be used for drawing each character included in the character string to be displayed on the display screen among the plurality of fonts;
Based on the attribute information of each font corresponding to a predetermined number of priority numbers of two or more from the top among the priority levels acquired by the priority level acquisition unit, and the font attribute information determined by the font determination unit Drawing position determining means for determining a drawing position for drawing the character string;
A drawing unit that draws each character of the character string indicated by the information acquired by the character string acquisition unit using the font determined by the font determination unit according to the drawing position determined by the drawing position determination unit. An information processing apparatus comprising:   The drawing position determining means includes a maximum ascending width of the ascending widths of the fonts corresponding to a predetermined number of priority orders of two or more from the top among the priorities acquired by the priority order acquiring means, and the font determination 5. The information processing apparatus according to claim 4, wherein a base line for drawing the character string is determined based on a large ascending width among the ascending widths of the fonts determined by the means. Reference position acquisition means for acquiring a reference position serving as a reference for arranging a character string to be displayed on the display screen,
The drawing position determining means determines the drawing position by specifying a width by which a baseline of the character string is shifted with respect to the reference position acquired by the reference position acquiring means. The information processing apparatus according to any one of 1 to 5.   The information processing apparatus according to claim 6, wherein the reference position acquisition unit acquires, as the reference position, coordinates related to a region where the character string is superimposed. Of the plurality of fonts, further comprising attribute information determination means for at least one font used for the process of determining the drawing position,
The drawing position determination unit specifies a font to be excluded from at least one or more fonts used in the process of determining the drawing position according to a determination result of the attribute information determination unit. 8. The information processing apparatus according to any one of items 7. An information processing apparatus control method capable of drawing a character string using a plurality of fonts,
A character string acquisition step of acquiring information indicating a character string to be displayed on the display screen by the character string acquisition means;
A language information acquisition step of acquiring language information set in the information processing apparatus by language information acquisition means;
A font determining step for determining a font to be used for drawing each character included in the character string to be displayed on the display screen among the plurality of fonts by the font determining means;
Drawing that draws the character string based on the font attribute information corresponding to the language information acquired in the language information acquisition step and the font attribute information determined in the font determination step by the drawing position determination means A drawing position determining step for determining the position;
Each character of the character string indicated by the information acquired in the character string acquisition step is used by the drawing unit according to the drawing position determined in the drawing position determination step, using the font determined in the font determination step. An information processing apparatus control method comprising: a drawing step of drawing. An information processing apparatus control method capable of drawing a character string using a plurality of fonts,
A character string acquisition step of acquiring information indicating a character string to be displayed on the display screen by the character string acquisition means;
A priority order obtaining step of obtaining a predetermined priority order for each of at least some of the plurality of fonts by the priority order obtaining means;
A font determining step for determining a font to be used for drawing each character included in the character string to be displayed on the display screen among the plurality of fonts by the font determining means;
The drawing position determination means determines the attribute information of each font corresponding to a predetermined number of priorities of two or more from the top among the priorities acquired in the priority order acquisition step, and is determined in the font determination step. A drawing position determining step for determining a drawing position for drawing the character string based on the attribute information of the font;
Each character of the character string indicated by the information acquired in the character string acquisition step is used by the drawing unit according to the drawing position determined in the drawing position determination step, using the font determined in the font determination step. An information processing apparatus control method comprising: a drawing step of drawing.   A program for causing a computer to function as the information processing apparatus according to claim 1 by being read and executed by the computer.   A computer-readable storage medium storing the program according to claim 11.

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