JPS63205691A - Bit map display device - Google Patents
Bit map display deviceInfo
- Publication number
- JPS63205691A JPS63205691A JP62038426A JP3842687A JPS63205691A JP S63205691 A JPS63205691 A JP S63205691A JP 62038426 A JP62038426 A JP 62038426A JP 3842687 A JP3842687 A JP 3842687A JP S63205691 A JPS63205691 A JP S63205691A
- Authority
- JP
- Japan
- Prior art keywords
- storage means
- attributes
- image information
- temporary storage
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012986 modification Methods 0.000 claims description 20
- 230000004048 modification Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Controls And Circuits For Display Device (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ビットマツプを構成する区分領域の各々が属
性を持っているビットマツプ表示装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bitmap display device in which each of the segmented areas constituting a bitmap has an attribute.
従来の技術
ビットマツプ表示装置で画像例えば文字等を表示する際
文字等に属性を付与するには、各画素に属性の数をＮと
して１０ｇ２Ｎビツトの情報量を持たせれば良い。しか
しこれでは属性を付与しない装置に比してｌｏｇｇＮ倍
の容量を持つ記憶手段が必要となる。これはまた画像の
書き換え速度の制約にもなる。この情報量を削減するに
は属性を画素ごとではな（領域ごとに付与するようにす
れば良い。文字等の特性を考えると矩形領域ごとに属性
を付与するのが適当と考えられる。When displaying an image, such as a character, using a conventional bitmap display device, in order to assign an attribute to the character, each pixel may have an information amount of 10g2N bits, where the number of attributes is N. However, this requires storage means with a capacity logN times that of a device that does not assign attributes. This also limits the image rewriting speed. In order to reduce this amount of information, attributes should be assigned to each region rather than to each pixel. Considering the characteristics of characters, etc., it is considered appropriate to assign attributes to each rectangular region.
本発明者が先に提案した特願昭６１−２８４７０７号に
おいては、画素を保持する主記憶手段とは別に領域ごと
の属性を保持する副記憶手段を設け、主記憶手段を表示
手段に同期して読み出すのと同様に副記憶手段も表示手
段に同期して読み出して各矩形領域の属性を得ていた。In Japanese Patent Application No. 61-284707, which was previously proposed by the present inventor, a sub-memory means for retaining attributes for each area is provided separately from a main memory means for retaining pixels, and the main memory means is synchronized with the display means. In the same way, the attributes of each rectangular area are obtained by reading out the sub-storage means in synchronization with the display means.
発明が解決しようとする問題点
一般に記憶手段が概念上２次元の広がりを持つようなア
クセスを行うのは１次元の広がりの場合よりも手順を要
する。しかしながら従来の方法においては副記憶手段も
主記憶手段と同様に２次元の広がりを持っている上に、
読み出しアドレスの更新方法は必然的に主記憶手段とは
興なったものになるので制御手段の構成が複雑になる。Problems to be Solved by the Invention In general, accessing a storage means conceptually having a two-dimensional extent requires more procedures than when the storage means has a one-dimensional extent. However, in the conventional method, the secondary storage means has a two-dimensional extent like the main storage means, and
Since the method of updating the read address is necessarily different from that of the main storage means, the configuration of the control means becomes complicated.
またスクロール表示を行う際には従来の方法では主記憶
手段の内容と副記憶手段の内容を共に転送する必要があ
るが、この時両者の間にある対応関係にずれが生じて見
栄えを著しく損なう。In addition, when performing a scroll display, in conventional methods it is necessary to transfer the contents of the main memory means and the contents of the sub-memory means together, but at this time, a mismatch occurs in the correspondence between the two, which significantly impairs the appearance. .
さらに副記憶手段の容量も無視できるほど小さいとは言
い難い。Furthermore, it is difficult to say that the capacity of the secondary storage means is so small that it can be ignored.
問題点を解決するための手段
本発明は主記憶手段と一時記憶手段と修飾手段と表示手
段と制御手段とから構成されるビットマツプ表示装置で
ある。Means for Solving the Problems The present invention is a bitmap display device comprising main storage means, temporary storage means, modification means, display means and control means.
主記憶手段は概念上２次元の広がりを持つ記憶手段で、
ビットマツプ画像情報に加えてそのビットマツプを区分
した２次元領域の各々が持つ属性を行間に記憶する。一
時記憶手段は概念上１次元の広がりを持つ記憶手段で、
主記憶手段から属性が読み出される時にそれを記憶して
次に書き込まれるまでの間はその属性を修飾手段に供給
する。The main storage means is a storage means that conceptually has a two-dimensional spread.
In addition to the bitmap image information, the attributes of each two-dimensional area into which the bitmap is divided are stored between the lines. Temporary storage means is a storage means that conceptually has a one-dimensional spread.
When an attribute is read from the main storage means, it is stored and supplied to the modification means until it is written next time.
修飾手段は一時記憶手段より得られる属性によって、主
記憶手段より得られる画像情報を修飾して表示手段に送
る。表示手段は修飾手段より送られて来る修飾された画
像情報を表示する。The modification means modifies the image information obtained from the main storage means using the attributes obtained from the temporary storage means and sends the modified image information to the display means. The display means displays the modified image information sent from the modification means.
制御手段は主記憶手段を表示手段に同期して読み出し１
画像情報は修飾手段に送り、属性は一時記憶手段に書き
込む。The control means reads out the main memory means in synchronization with the display means.
The image information is sent to the modification means, and the attributes are written to the temporary storage means.
作用
文字等の表示を考えると、ビットマツプは決して一様に
埋め尽くされたものではな（通常は字間行間というもの
が存在する。なんらかの方法で行間部分である事が先見
できればその部分は必ず背景になるので画像情報がいら
ない。Considering the display of active characters, etc., a bitmap is never filled uniformly (usually there is something called a line spacing between characters. If you can somehow predict that it is a space between lines, that area will always be in the background). Therefore, image information is not required.
本発明はこの点に注目したもので、ビットマツプを区分
した２次元領域の先頭の１ないし数ラスタ行を行間部分
と規定し、それ以外のラスタ行を表示部分と規定して行
間部分にその領域の属性を格納するようにしたものであ
る。The present invention focuses on this point, and defines the first one or several raster lines of a two-dimensional area into which a bitmap is divided as the interline area, and defines the other raster lines as the display area, and uses the area between the lines as the display area. It is designed to store the attributes of.
制御手段は主記憶手段から表示部分を読み出した時には
それを画像情報として修飾手段に送ると同時に一時記憶
手段を読み出してそれを属性として修飾手段に送る。列
が興なる領域の属性は異なるアドレスから読み出すが、
列が同じであれば行が異なっても同じアドレスから読み
出す。行間部分を読み出した時にはそれを一時記憶手段
に書き込むと同時に画像情報としては背景を修飾手段に
送る。列が興なる領域の属性は興なるアドレスに書き込
むが、列が同じであれば行が異なっても同じアドレスに
書き込む。この時に修飾手段に送る属性としては既定値
とする場合と書き込む前に一時記憶手段に入っていた値
とする場合がある。When the control means reads out the display portion from the main storage means, it sends it to the modification means as image information, and at the same time reads it from the temporary storage means and sends it to the modification means as an attribute. The attributes of the area where the column occurs are read from a different address,
If the columns are the same, the data is read from the same address even if the rows are different. When the interline portion is read out, it is written into the temporary storage means and at the same time, the background is sent as image information to the modification means. The attribute of the area where the column starts is written to the starting address, but if the column is the same, it is written to the same address even if the row is different. At this time, the attribute sent to the modification means may be a default value or a value stored in the temporary storage means before writing.
修飾手段は画像情報と属性とを受けて画像情報を属性の
付与されたものに修飾した後、表示手段に送る。表示手
段は修飾手段より送られて来る情報を表示して画像にす
る。The modifying means receives the image information and the attributes, modifies the image information to include the attributes, and then sends the image information to the display means. The display means displays the information sent from the modification means and converts it into an image.
こうして２次元領域を単位に属性の付与された画像が表
示され、しかも画像情報と属性が主記憶手段内に１元的
に管理されるので制御手段の構成は簡単になりスクロー
ル表示を行う際のずれも生じない。また一時記憶手段の
容量は文字列１行分の属性が保持できるだけあれば良い
。In this way, images with attributes assigned are displayed in units of two-dimensional areas, and since the image information and attributes are centrally managed in the main storage means, the configuration of the control means is simplified, and when scrolling display is performed, No deviation occurs. Further, the capacity of the temporary storage means is sufficient as long as it can hold attributes for one line of character strings.
実施例
図は本発明の一実施例を示すものである。制御手段は主
記憶手段読み出しポート５１と一時記憶手段読み出し／
書き込みポート５２とタイミング生成部５３と背景生成
部５４とに分けて示されている。本例では属性として色
を、２次元領域としてｎｘｍの矩形領域を取り扱ってい
る。またそれぞれ赤色、緑色、青色の発光を意味する３
ビ−ットが１組でｎｘｍ矩形領域の属性となっている。Embodiment Figures show one embodiment of the present invention. The control means has a main storage means read port 51 and a temporary storage means read port 51.
A write port 52, a timing generation section 53, and a background generation section 54 are shown separately. In this example, color is used as an attribute and an nxm rectangular area is used as a two-dimensional area. Also, 3 means red, green, and blue light emission, respectively.
One set of bits is an attribute of an nxm rectangular area.
主記憶手段１上で各矩形領域の先頭の１ラスタ行がその
領域の属性を保持する行間部分で、残りのｍ −１行が
表示部分である。本実施例では各領域の属性は３ビツト
だけであるのでｎ〉−３であれば良い。一時記憶手段２
にはちょうど１行分の属性が貯えられる。すなわち最大
でも主記憶手段１の１ラスタ行分の容量があれば良い。On the main storage means 1, the first raster line of each rectangular area is the interline part that holds the attributes of that area, and the remaining m-1 lines are the display part. In this embodiment, the attribute of each area is only 3 bits, so n>-3 is sufficient. Temporary storage means 2
can store exactly one row of attributes. That is, it is sufficient that the capacity is at most one raster line of the main storage means 1.
表示が１行おこなわれる度に一時記憶手段２は繰り返し
繰り返し用いられる。The temporary storage means 2 is repeatedly used every time one line is displayed.
主記憶手段１から行間部分が読み出される時には制御手
段の背景生成部５４はそれを無視して背景すなわち論理
０を修飾手段４に送る。一方一時記憶手段読み出し／書
き込みポート５２は読み出されたままの情報を受は取っ
てそれを一時記憶手段２の対応するアドレスに書き込も
うとする。この時一時記憶手段読み出し／書き込みポー
ト５２から修飾手段３へは既定値を送っておいてその間
に書き込むやり方と、まず一時記憶手段２の対応するア
ドレスを読み出してそれを修飾手段３へ送り次に同じア
ドレスに主記憶手段１から受は取った情報を書き込むや
り方とがある。When the interline portion is read out from the main storage means 1, the background generation section 54 of the control means ignores it and sends the background, that is, logical 0, to the modification means 4. On the other hand, the temporary storage means read/write port 52 receives the information as it has been read and attempts to write it to the corresponding address of the temporary storage means 2. At this time, there are two methods: sending a default value from the temporary storage means read/write port 52 to the modification means 3 and then writing it in the meantime; or first reading the corresponding address of the temporary storage means 2 and sending it to the modification means 3. There is a method of writing the information received from the main storage means 1 to the same address.
主記憶手段１から表示部分が読み出される時には背景生
成部５４はそれをそのまま修飾手段４に送る。と同時に
一時記憶手段読み出し／書き込みポート５２は一時記憶
手段２の対応する部分を読み出して修飾手段４に送る。When a display portion is read out from the main storage means 1, the background generation section 54 sends it as is to the modification means 4. At the same time, the temporary storage means read/write port 52 reads the corresponding portion of the temporary storage means 2 and sends it to the modification means 4.
いずれにしても修飾手段３は背景生成部５４から送られ
て来る画像情報と一時記憶手段読み出し／書き込みポー
ト５２から送られて来る一属性とから着色された画像を
生成する。修飾手段３はわずか論理ゲート１段であるの
で十分に高速であって、画像情報と表示手段４との同期
関係を乱すものではなく、修飾されたすなわち着色され
た画像情報はそのまま表示手段４に送られる。In any case, the modification means 3 generates a colored image from the image information sent from the background generation section 54 and one attribute sent from the temporary storage means read/write port 52. Since the modification means 3 has only one stage of logic gates, it is sufficiently fast and does not disturb the synchronization relationship between the image information and the display means 4, and the modified, that is, colored, image information is sent to the display means 4 as is. Sent.
これらを表示手段４が表示する事でｎｘｍ領域を単位に
着色されたつまり属性の付与された画像が得られる。By displaying these on the display means 4, an image colored in units of nxm areas, that is, an image to which attributes are added, is obtained.
発明の詳細
な説明したように、本発明によればビットマツプ表示装
置において属性の付与された画像をより少ない情報量で
表示することができ記憶手段の容量削減と画像の書き換
え速度向上を得られる上に、スクロール表示の見栄えが
悪いとか制御手段の構成が複雑であるといった従来例の
抱える問題を乗り越えられるのでその実用的価値には大
なるものがある。As described in detail, according to the present invention, an image to which an attribute is attached can be displayed with a smaller amount of information in a bitmap display device, and the capacity of the storage means can be reduced and the image rewriting speed can be improved. In addition, it has great practical value because it can overcome the problems of the conventional example, such as poor appearance of the scroll display and complicated configuration of the control means.
図は本発明における一実施例のビットマツプ表示装置の
回路図である。
１・・−主記憶手段、２・・・一時記憶手段、３・・・
修飾手段、４・・・表示手段、５１・・・制御手段の主
記憶手段読み出しポート、５２・・・制御手段の一時記
憶手段読み出し／書き込みポート、５３・・・制御手段
のタイミング生成部、５４−・・制御手段の背景生成部
。The figure is a circuit diagram of a bitmap display device according to an embodiment of the present invention. 1...-main storage means, 2... temporary storage means, 3...
Modification means, 4...Display means, 51...Main storage means read port of control means, 52...Temporary storage means read/write port of control means, 53...Timing generation unit of control means, 54 - Background generation section of the control means.
Claims (1)
プを分割する事により得られる各２次元領域の属性を保
持する主記憶手段と、前記主記憶手段から得られる前記
属性を一時的に保持する一時記憶手段と、前記一時記憶
手段から得られる情報によって前記主記憶手段より得ら
れる前記画像情報を修飾して修飾画像情報とする修飾手
段と、前記修飾画像情報を表示する表示手段と、前記主
記憶手段を前記表示手段に同期して読み出し、前記画像
情報は前記修飾手段に送り前記属性は前記一時記憶手段
に送り、さらに前記一時記憶手段を読み出してそれを前
記修飾手段に送る制御手段とを具備し、前記２次元領域
を単位に属性の付与された画像を得るビットマップ表示
装置。main storage means for holding bitmap image information and attributes of each two-dimensional area obtained by dividing the bitmap; and temporary storage means for temporarily holding the attributes obtained from the main storage means. a modifying means for modifying the image information obtained from the main storage means with information obtained from the temporary storage means to obtain modified image information; a display means for displaying the modified image information; and a display means for displaying the modified image information; control means for reading in synchronization with the display means, sending the image information to the modification means and sending the attributes to the temporary storage means, further reading the temporary storage means and sending it to the modification means; A bitmap display device that obtains an image to which attributes are assigned in units of the two-dimensional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038426A JPH0830945B2 (en) | 1987-02-20 | 1987-02-20 | Bitmap display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038426A JPH0830945B2 (en) | 1987-02-20 | 1987-02-20 | Bitmap display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63205691A true JPS63205691A (en) | 1988-08-25 |
| JPH0830945B2 JPH0830945B2 (en) | 1996-03-27 |
Family
ID=12524984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62038426A Expired - Lifetime JPH0830945B2 (en) | 1987-02-20 | 1987-02-20 | Bitmap display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0830945B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06289848A (en) * | 1992-05-20 | 1994-10-18 | Matsushita Graphic Commun Syst Inc | Display system and display controller |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50104834A (en) * | 1974-01-21 | 1975-08-19 | ||
| JPS5876880A (en) * | 1981-10-31 | 1983-05-10 | 株式会社東芝 | Display |
-
1987
- 1987-02-20 JP JP62038426A patent/JPH0830945B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50104834A (en) * | 1974-01-21 | 1975-08-19 | ||
| JPS5876880A (en) * | 1981-10-31 | 1983-05-10 | 株式会社東芝 | Display |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06289848A (en) * | 1992-05-20 | 1994-10-18 | Matsushita Graphic Commun Syst Inc | Display system and display controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0830945B2 (en) | 1996-03-27 |
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