CN101621575B - Embedded vector font color changing method - Google Patents
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- CN101621575B CN101621575B CN2009101015198A CN200910101519A CN101621575B CN 101621575 B CN101621575 B CN 101621575B CN 2009101015198 A CN2009101015198 A CN 2009101015198A CN 200910101519 A CN200910101519 A CN 200910101519A CN 101621575 B CN101621575 B CN 101621575B
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Abstract
The invention discloses an embedded vector font color changing method for realizing the receiving and transmitting and displaying of multimedia messages in an embedded system with low processing capacity and low storage capacity. A message receiving party and a message transmitting party use same message coding mode. The embedded vector font color changing method comprises the following steps: adding color information of a message into coding information of the message when a user writes the message, then sending the coding information to a called user, obtaining corresponding color information and character information by analyzing after the called user receives the coding information, then executing the following steps to process all characters in the message, processing the characters by using a font engine to obtain 256-grayscale bitmap information and color information of the characters; converting the data of each point of the bitmap information according to the 256-grayscale bitmap information and the color information; and displaying the characters on a screen by using a vector font decoder according to the obtained color information.
Description
Technical field
The present invention relates to a kind of embedded vector font color changing method towards embedded system.
Background technology
Note is shown one's talent in numerous means of communication as a kind of easy to use, instant messaging mode that expense is cheap, is more and more used.In embedded system, such as mobile phone, the user can receive and dispatch note easily by the SMS module of mobile phone, similarly, some are also to be provided with SMS module in the embedded system that makes up of core by single-chip microcomputer or embedded MCU, and the user can receive and dispatch note by SMS module.Extensive use along with note, the user no longer is satisfied with the single dot matrix Chinese character of color, but wish to use the colour of the vector fonts that fade effect is arranged to show, and the color of note allows the sender to be provided with, and promptly receiver's SMS module can demonstrate the short message content of forms such as the set font color of addresser, font size, font shape.But present disposal ability is lower, the less embedded system of storage is limited by its reduction process ability and low storage capacity, can't realize that the colour of the vector fonts of fade effect shows.That the embedded system that described disposal ability is lower, storage is less is relatively typical and more commonly used is functional mobile phone (Feature phone).
This saying of described functional mobile phone (Feature phone) is mainly at " smart mobile phone (Smart Phone) ", and so-called smart mobile phone (Smart Phone) is exactly the mobile phone (just as computer) that can arbitrarily install and unload application software.Functional mobile phone does not possess open operating system, has only privately owned embedded system.It only can be by a limited interface such as JAVA or BREW support third party software.With respect to the software on the intelligent machine, JAVA on the function machine or the common ability of BREW software are more weak, are not easy to other functional mobile phone and integrate, and also are difficult for being integrated into the main users interface of mobile phone.In these functional mobile phones, particularly low terminal, as the MTK platform mobile phone, do not realize the demonstration of colour phasor font in the note, this is because the hardware of functional mobile phone and the restriction of embedded system, its arithmetic speed and memory capacity are all very limited, and is especially limited to the demonstration and the tenability of character library.The prior function mobile phone can be at the dot matrix Chinese character that shows identical colour on the mobile phone of oneself or on the mobile phone of same model, promptly can support and use colored dot matrix word library on the mobile phone of oneself or on the mobile phone of same model, has only the intelligent functional mobile phone utilization of minority customized embedded system font engine, loaded vector font library, but the vector fonts that shows in the note also has only the demonstration of 256 gray scales, it or not colored the demonstration, and in this function of note not realization especially of transmitting-receiving and display color vector fonts on the functional mobile phone between the different model or on the intelligent functional mobile phone, the i.e. note that the user writes according to the font format of own setting on a model mobile phone, after being sent to this note on another different model mobile phone, the mobile phone of receiving note can't show the font format of having set on the mobile phone of sending short messages originally, just according to receiving that the font format of the mobile phone of note itself shows.
Except above-mentioned relatively typical functions mobile phone, for other embedded system, some is simple communication module terminal, only support general character to show, do not realize the transmitting-receiving and the Presentation Function of above-mentioned colour phasor font especially, the embedded system that makes up such as the PIC single-chip microcomputer with MicroChip company is an example, and its short message communication system is made of following module: main control module, keyboard input module, demonstration output module and transceiver module.System's main program utilization modular construction wherein has the SMS module of transmission, receives SMS module and editing short message module.The outstanding characteristics of the PIC single-chip microcomputer of described MicroChip company are that volume is little, low in energy consumption, reduced instruction set computer, anti-interference is good, reliability is high, stronger analog interface is arranged, the code good confidentiality, most of chip has the chip of its compatible FLASH program storage, is applicable to that consumption is big, of low grade, the product of Price Sensitive.All be widely used in business automation equipment, consumption electronic product, telecommunication communication, intelligent instrumentation, automotive electronics, Electronic Finance, Industry Control different field.The PIC single-chip microcomputer of MicroChip company adds wireless module just can be realized sending short messages mutually between any two machines, can be as the regular handset editing short message, loom can be by user's name to distinguish other looms, realize the communication of a machine to another machine, also can realize the communication of a machine to multimachine with omnipotent name (" WDX "), whole system human-computer interaction interface close friend is similar to the functional mobile phone system, operation indicating is arranged, but its SMS module does not realize the transmitting-receiving and the demonstration of colour phasor font.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the shortcoming of above prior art, provide a kind of and can in the embedded system of reduction process ability and low storage capacity, realize the transmitting-receiving of colored note and the embedded vector font color changing method of demonstration, in other words, a kind of embedded vector font color changing method is provided, and this method can be passed through the transmitting-receiving and the demonstration of the colored note of Implementation of Embedded System of reduction process ability and low storage capacity.
Technical scheme of the present invention is; A kind of embedded vector font color changing method is provided; Detailed process is as follows; The short message receiving-transmitting both sides use identical short message encoding mode; When user's create message; This user's embedded system joins the colouring information of note in the coded message of note; Then described coded message is issued the other side's embedded system; After the other side's embedded system receives described coded message; Parsing obtains corresponding colouring information and short message content; Carry out again following steps and process all characters in the short message content
Step 1, use font engine are handled character, obtain the message bit pattern of 256 gray scales of this character;
Step 2, the data of the every bit of message bit pattern are converted to colour information according to the message bit pattern of 256 gray scales and colouring information, promptly according to the half-tone information of the every bit of colouring information and message bit pattern, color to the point of diverse location in each character is carried out different processing, the concentration information of the half-tone information of each point as a color, wherein, at first obtain the point of the profile trunk of expression character in the message bit pattern, the colouring information of these points is set to said short message and resolves the color that obtains then; For the contour edge color of character, at first obtain all marginal points of character, according to its concentration information and trunk point color these points are used the color dodge algorithm then; At last, the background colour that the point of character edge is adjacent uses the color gradient algorithm to carry out transition;
The colour information that step 3, basis obtain utilizes the vector fonts decoder of embedded system to demonstrate character on the screen of embedded system.
After adopting technique scheme, embedded vector font color changing method of the present invention compared with prior art, have the following advantages: because the handling process of the variable color processing method of the vector fonts of embedded system of the present invention is simple and reliable, to the hardware handles ability of system and storage capacity require low, and, after simulation on the more common MTK platform, do not see the delay phenomenon that character shows, can in the embedded system of reduction process ability and low storage capacity, realize the transmitting-receiving of colored note and the advantage of demonstration so embedded vector font color changing method of the present invention has.
As improvement, the front three of described coded message is used to store colouring information, like this, has just simplified coded message, more is applicable to the embedded system of reduction process ability and low storage capacity, helps the raising of the performance of embedded vector font color changing method.
Figure of description
Fig. 1 is one of theory diagram of embedded vector font color changing method of the present invention.
Fig. 2 is two of the theory diagram of embedded vector font color changing method of the present invention.
Fig. 3 is the handled data that are stored in the Song typeface Chinese character " newly " in the CharData array of embedded vector font color changing method according to the present invention.
Fig. 4 is the gray-scale map of the handled Song typeface Chinese character of embedded vector font color changing method " newly " according to the present invention.
Fig. 5 shows the flow chart of note character for the font display module of embedded vector font color changing method of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments embedded vector font color changing method of the present invention is described further.
A kind of embedded vector font color changing method; Detailed process is as follows; The short message receiving-transmitting both sides use identical short message encoding mode; When user's create message; This user's embedded system joins the colouring information of note in the coded message of note; Then described coded message is issued the other side's embedded system; After the other side's embedded system receives described coded message; Parsing obtains corresponding colouring information and short message content; Carry out again following steps and process all characters in the short message content
Step 1, use font engine are handled character, obtain the message bit pattern of 256 gray scales of this character;
Step 2, the data of the every bit of message bit pattern are converted to colour information according to the message bit pattern of 256 gray scales and colouring information, promptly according to the half-tone information of the every bit of colouring information and message bit pattern, color to the point of diverse location in each character is carried out different processing, the concentration information of the half-tone information of each point as a color, wherein, at first obtain the point of the profile trunk of expression character in the message bit pattern, the colouring information of these points is set to said short message and resolves the color that obtains then; For the contour edge color of character, at first obtain all marginal points of character, according to its concentration information and trunk point color these points are used the color dodge algorithm then; At last, the background colour that the point of character edge is adjacent uses the color gradient algorithm to carry out transition;
The colour information that step 3, basis obtain utilizes the vector fonts decoder of embedded system to demonstrate character on the screen of embedded system.
Described short message encoding mode is the PDU coding.
The front three of described coded message is used to store colouring information.
The vector fonts engine that described vector fonts engine is various embedded systems, in this example, described vector fonts engine adopts prior art.
At first, consult Fig. 1, Fig. 1 is one of theory diagram of embedded vector font color changing method of the present invention, is used for representing that the present invention has the transmittance process of the note of colouring information.
In following process, receiving-transmitting sides has all used identical short message encoding mode.
At first, the note transmit leg is provided with the color of note when writing note, the embedded system of transmit leg can be combined with the colouring information of short message content and setting when note sent, be converted into coding to be sent, comprise Text pattern and PDU pattern, this cataloged procedure is finished in the embedded system of transmit leg.The content of short message encoding information comprises: service centre's number, receiver's phone number and short message content etc.When transmit leg sent note, the color coding of former correspondences with in the short message content that sends as redness, blueness, white etc., in this example was three.Other parts for short message encoding information are not done change.
Note transmits through short message service center, after arriving the recipient, recipient's embedded system is decoded to the short message encoding information of sending, former data according to short message content, obtain corresponding color setting, as redness, blueness, white etc., remaining content then is the text message of short message content.This moment, the colouring information of transmit leg passed to the recipient, and then, the recipient handles current note color.
The note colouring information transmittance process of embedded vector font color changing method of the present invention, do not change other content in the short message encoding information, do not change transmission of messages coded system such as Text pattern or PDU pattern yet, just in former positions of short message content, add the configuration information of color, can not influence note transmission in information centre behind coding.
Fig. 2 is two of the theory diagram of embedded vector font color changing method of the present invention, i.e. the main flow process that the variable color of vector fonts of the present invention is handled.When the user will show character in the note, embedded system obtains the pairing character code of character earlier, if not general Unicode sign indicating number, we will do the conversion of coding earlier so, calling font engine again handles, obtain corresponding 256 grades of half-tone informations of each point of this character, promptly concentration information deposits the half-tone information of this character among the array CharData in.
If the embedded system setting is shown as 20 * 20 pixels (pixel count=* resolution/72 of counting) sizes, then form one 20 * 20 promptly the storage of 400 points in array CharData.As shown in Figure 3, be the data value of the each point of Chinese character " newly ", wherein each point data all decimally numerical table show.First data are the concentration information of the point of first row, first row, and second data is the concentration information of the point of the first row secondary series ... by that analogy, n data are represented the concentration of the point of the capable j row of i.If all data among the array CharData are shown with image format, the concentration of each point forms a width of cloth gray level image as half-tone information, as shown in Figure 4, is shown as the image of Chinese character " newly ".
According to user's color setting, i.e. the colouring information of note character, the font display module in the GDI GDI of embedded system is further processed the message bit pattern of 256 gray scales of gained.When the user need change font color, can in embedded system, be provided with.Set font color for red such as the user, and corresponding RGB component value is (255,0,0), is set to blueness, and corresponding RGB component value is respectively (0,0,255), if be set to other color, can obtain the value of corresponding color RGB component.The colouring information of user's character display is stored among the variable TextColour.
When character was carried out color treatments, at first color data (data among the variable TextColour) that is provided with according to the user and the half-tone information (data in the CharData array) that obtained were converted to colour information with the data of every bit.In image showed, the value of three color components of RGB of gray level image was identical, and the value of three components of RGB of coloured image is unequal.The color of general embedded system acquiescence is a white, and such as mobile phone, therefore when the user did not need to change color, the value that the gray value of each point that we will get directly is made as three components of its RGB got final product.At this moment, numerical value 0 expression black, numerical value 255 expression whites, the numerical value between them is then represented a certain gray scale.If the user need change color, just need be converted to colour information to each point according to the font color that is provided with and the half-tone information of gained, promptly obtain its rgb value through computing.
Information to the difference of the profile of character will be carried out different processing.Point on the profile trunk, concentration value is near maximum 255, the core of whole profile has been described substantially, the font color TextColour that the color of these points is provided with for the user, promptly at first obtain the point on all profile trunks of expression, the colouring information of these points is set to the font color that the user is provided with then.
The point of the contour edge of character, its concentration value is between trunk point concentration value and zero.When handling, should obtain with trunk on the some color a kind of transition effect is arranged.Obtain all marginal points except main outline earlier, use the concentration information of TextColour and these points to use our color dodge algorithm then, finally obtain the colouring information of putting on the contour edge.
If color is set is S, and concentration information is P, and look is D as a result.Three components of the RGB of S and D are respectively S
R, S
G, S
B, D
R, D
G, D
B
The color dodge algorithmic formula is:
At this, for pure color, as redness, its R component value is 255, and through above-mentioned formula manipulation, its R value can exceed the expression scope.Therefore to prevent to overflow.Each component value is prevented to overflow processing, and promptly when its value went beyond the scope, we gave its designated value.Simultaneously red its G, B component value are 0, still are 0 value when using above-mentioned formula, not change.We to component value be 0 value to do special processing.
The contour edge of character and the fade effect of background colour.The color of the contour edge of character and the transition of background colour affect the whole display effect of literal, if the contour edge contrast of background colour and gradual change is too obvious, have the effect of edge sawtooth.In order to eliminate this effect, need the gradual change algorithm of utilization background colour and font color.
In practice, can utilize multiple color gradient algorithm to realize, as linear interpolation, linear method, the cosine interpolation method of inserting.Linear interpolation is modal color gradual changed method, and linear slotting method is the color gradual changed method that a kind of color has sharp contrast, and the fade effect that the cosine interpolation method draws has extraordinary smooth effect.
What use in the general utility functions mobile phone is the raster font decoder, when we need show the information of vector fonts, needs to revise its inherent decoding mechanism, shows with the adaptive vector font.If functional mobile phone has the vector fonts decoder, the character that so direct demonstration is carried out after the color treatments gets final product.
Carrying out vector fonts shows, what pay particular attention to is, the colouring information that finally utilizes the point that display driving software draws is one 16 a integer, RGB component wherein is 565 pattern, that is: from the low level to a high position, use 0 ~ 15 to represent red component respectively, 0 ~ 5 expression blue component, 6 ~ 11 expression green components, 11 ~ 15 expression blue components.And in calculating process, three components of RGB are used 8 bit representations (888) pattern respectively, promptly use 0 ~ 7 to represent red component from the low level to a high position respectively, and 8 ~ 15 represent green component, represent blue component for 16 ~ 23, and a residue high position can be deposited out of Memory.Therefore, need carry out corresponding mode switch, promptly RGB888 changes RGB565.If each component is R under the RGB888 pattern
1, G
1, B
1, the method that then is converted to RGB565 is: ((R
1＞＞3)＜＜11) | ((G
1＞＞2)＜＜5) | (B
1＞＞3).
The process that on screen, shows vector fonts, as shown in Figure 5.At first to do some initialized work, it is the corresponding data of storing in initialization input and output flow index and each register, wherein, the relevant information of store character in each register, pending data have been stored in the inlet flow, be the color data of each point of character to be shown, what output stream pointed to is the position of display screen character string in the internal memory.Then, navigate to the original position in the inlet flow, in register, obtain simultaneously inlet flow mask information, wherein, inlet flow mask information is the figure place that is used for controlling the data of at every turn taking out from inlet flow, then obtains current data pointer data pointed, and the current data pointer all points to the original position of the data that also will continue to read at every turn in inlet flow, after obtaining data, handle obtaining data.Obtain the correct display position of output stream then, on screen, demonstrate image.After handling data, the mobile data pointer is moved the original position of next data of character in the inlet flow surely to.When data processing finished in the inlet flow, a character demonstration finished, otherwise continued to handle next data in the inlet flow.Each character all carries out decoding and displaying according to above-mentioned steps.When showing, all fonts finish font display module end-of-job; Otherwise the font display module continues to handle character late.
Above introduce, only be technological thought of the present invention and characteristics, its purpose is being used those skilled in the art can understand content of the present invention and is being implemented according to this, when not limiting scope of the invention process with this, i.e. any modification of doing according to disclosed spirit and principle generally, be equal to and replace and improvement etc., must be encompassed in the claim of the present invention.
Claims (2)
1. embedded vector font color changing method, detailed process is as follows, the short message receiving-transmitting both sides use identical short message encoding mode, this short message encoding mode is Text pattern or PDU pattern, when user's create message, this user's embedded system joins the colouring information of note in the coded message of note, then described coded message is issued the other side's embedded system, it is characterized in that, after the other side's embedded system receives described coded message, parsing obtains corresponding colouring information and short message content, carries out following steps again and handles all characters in the short message content
Step 1, use font engine are handled character, obtain the message bit pattern of 256 gray scales of this character;
Step 2, the data of the every bit of message bit pattern are converted to colour information according to the message bit pattern of 256 gray scales and colouring information, promptly according to the half-tone information of the every bit of colouring information and message bit pattern, color to the point of diverse location in each character is carried out different processing, the concentration information of the half-tone information of each point as a color, wherein, at first obtain the point of the profile trunk of expression character in the message bit pattern, the colouring information of these points is set to said short message and resolves the color that obtains then; For the contour edge color of character, at first obtain all marginal points of character, according to its concentration information and trunk point color these points are used the color dodge algorithm then; At last, the background colour that the point of character edge is adjacent uses the color gradient algorithm to carry out transition;
The colour information that step 3, basis obtain utilizes the vector fonts decoder of embedded system to demonstrate character on the screen of embedded system.
2. embedded vector font color changing method according to claim 1 is characterized in that: the front three of described coded message is used to store colouring information.
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| CN102567295A (en) * | 2010-12-21 | 2012-07-11 | 北大方正集团有限公司 | Font processing method and device for embedded device |
| CN102625264A (en) * | 2011-01-28 | 2012-08-01 | 北京数字天域科技有限责任公司 | Method for realizing mobile phone short message animation effect |
| CN102541828A (en) * | 2012-01-11 | 2012-07-04 | 深圳市同洲视讯传媒有限公司 | Creating method for font example and embedded type system device |
| TW201407385A (en) * | 2012-08-15 | 2014-02-16 | Arphic Technology Co Ltd | Method of manipulating strings in embeded system |
| CN103096275A (en) * | 2013-01-15 | 2013-05-08 | 广东欧珀移动通信有限公司 | Short message compiling and receiving method and mobile terminal |
| CN105353948A (en) * | 2015-09-25 | 2016-02-24 | 维沃移动通信有限公司 | Information processing method and apparatus |
| CN109992221B (en) * | 2019-04-12 | 2022-11-18 | 深圳高通半导体有限公司 | Method for realizing processor chip for vector font operation |
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| CN1592423A (en) * | 2003-08-29 | 2005-03-09 | 三洋电机株式会社 | Image signal processing circuit and portable terminal device |
| CN1627764A (en) * | 2003-12-12 | 2005-06-15 | 三星电子株式会社 | Mobile communication terminal with multi-input device and method of using the same |
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| CN1592423A (en) * | 2003-08-29 | 2005-03-09 | 三洋电机株式会社 | Image signal processing circuit and portable terminal device |
| CN1627764A (en) * | 2003-12-12 | 2005-06-15 | 三星电子株式会社 | Mobile communication terminal with multi-input device and method of using the same |
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