| author | Stefan Vogel <sv@exept.de> |
| Tue, 28 Apr 2020 15:28:14 +0200 | |
| changeset 9038 | dd177fea6408 |
| parent 9035 | f07b260cf6b5 |
| permissions | -rw-r--r-- |
| 9035 | 1 |
"{ Encoding: utf8 }"
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" |
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COPYRIGHT (c) 1994 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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This is a demo example: |
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THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTOR ``AS IS'' AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTOR BE LIABLE |
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGE. |
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" |
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"{ Package: 'stx:libview' }"
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||
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"{ NameSpace: Smalltalk }"
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||
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FontDescription subclass:#BitmapFont |
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instanceVariableNames:'characterBitmaps ascent descent maxWidth maxHeight' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Graphics-Support' |
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! |
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!BitmapFont class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1994 by Claus Gittinger |
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All Rights Reserved |
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||
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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||
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This is a demo example: |
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||
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THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTOR ``AS IS'' AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTOR BE LIABLE |
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
|
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
|
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGE. |
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" |
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! |
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documentation |
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" |
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This class demonstrates, that it is possible to define your own |
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renderers for fonts - you could even write a class which reads |
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a truetype font from a ttf file and display those |
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(maybe someone finds the time to do this |
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and provides the code to the public domain ?) |
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Here is a simple & sample implementation of private bitmap fonts; |
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Glyphs for each character are stored in the instance variable |
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'characterBitmaps'. |
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Some sample glyphs can be created with the class' sampleGlyphs method. |
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The required protocol is found in drawing and accessing. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Font GraphicsContext |
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" |
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! |
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examples |
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" |
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a label showing characters in a new bitmap font: |
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[exBegin] |
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|font l| |
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font := (BitmapFont new glyphs:(BitmapFont sampleGlyhps)). |
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font setAscent:13; setDescent:3. |
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l := Label new. |
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l font:font. |
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l label:'aazzazaz'. |
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l open. |
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[exEnd] |
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a label showing characters in a new smily font: |
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[exBegin] |
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|font l| |
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font := (BitmapFont new glyphs:(BitmapFont smilyGlyhps)). |
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font setAscent:16; setDescent:0. |
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l := Label new. |
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l font:font. |
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l label:'aabbaaa'. |
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l open. |
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[exEnd] |
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demonstrate, that this font can be used in listViews just as any other font: |
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(well, missing character glyphs are blanked) |
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[exBegin] |
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|font top list| |
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font := (BitmapFont new glyphs:(BitmapFont sampleGlyhps)). |
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font setAscent:13; setDescent:3. |
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top := ScrollableView forView:(list := SelectionInListView new). |
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list font:font. |
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list list:#('a' 'z' 'aaa' 'zzz' 'azaz' 'zaza' 'aa' 'az' 'za' 'hello' 'abcdef' 'xyz').
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top extent:200@200. |
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top open. |
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[exEnd] |
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demonstrate, that this font can be used in textViews just as any other font: |
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(well, missing character glyphs are blanked) |
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[exBegin] |
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|font top list| |
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font := (BitmapFont new glyphs:(BitmapFont sampleGlyhps)). |
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font setAscent:13; setDescent:3. |
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top := ScrollableView forView:(list := EditTextView new). |
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list font:font. |
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list list:#('a' 'z' 'aaa' 'zzz' 'azaz' 'zaza' 'aa' 'az' 'za' 'hello' 'abcdef' 'xyz').
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top extent:200@200. |
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top open. |
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[exEnd] |
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another clock display: |
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defines a font with the 7-segment led bitmaps as glyphs for 0-9, |
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then simply displays the time as a string in that font. |
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[exBegin] |
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|glyphs f label| |
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glyphs := Array new:256. |
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glyphs |
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at:($0 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led0.xpm'). |
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glyphs |
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at:($1 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led1.xpm'). |
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glyphs |
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at:($2 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led2.xpm'). |
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glyphs |
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at:($3 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led3.xpm'). |
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glyphs |
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at:($4 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led4.xpm'). |
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glyphs |
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at:($5 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led5.xpm'). |
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glyphs |
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at:($6 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led6.xpm'). |
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glyphs |
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at:($7 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led7.xpm'). |
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glyphs |
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at:($8 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led8.xpm'). |
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glyphs |
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at:($9 asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/led9.xpm'). |
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glyphs |
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at:($: asciiValue + 1) |
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put:(Image fromFile:'../../goodies/bitmaps/xpmBitmaps/misc_numbers/ledCol.xpm'). |
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f := BitmapFont new glyphs:glyphs. |
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label := Label new label:(Time now printString). |
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label font:f. |
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label open |
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[exEnd] |
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||
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" |
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! ! |
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!BitmapFont class methodsFor:'instance creation'! |
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new |
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|newFont| |
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newFont := super new |
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family:'private' |
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face:nil |
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style:nil |
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size:nil |
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sizeUnit:#pt |
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encoding:nil. |
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^ newFont |
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" |
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BitmapFont new glyphs:(self sampleGlyhps). |
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" |
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"Modified: / 28-04-2020 / 15:09:48 / stefan" |
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! ! |
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!BitmapFont class methodsFor:'private'! |
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sampleGlyhps |
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"return the bitmap array for a sample font |
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(only contains glyphs for $a and $z)" |
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|characters| |
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characters := Array new:256. |
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characters |
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at:(Character space codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000]). |
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characters |
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at:($a codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00011111 2r11111000 |
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2r00011111 2r11111000 |
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2r00011000 2r00011000 |
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2r00011000 2r00011000 |
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2r00011000 2r00011000 |
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2r00011000 2r00011000 |
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2r00011000 2r00011000 |
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2r00011000 2r00011000 |
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2r00011111 2r11111110 |
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2r00011111 2r11111110 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000]). |
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characters |
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at:($z codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00011111 2r11111000 |
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2r00011111 2r11111000 |
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2r00000000 2r00110000 |
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2r00000000 2r01100000 |
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2r00011111 2r11111000 |
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2r00011111 2r11111000 |
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2r00000110 2r00000000 |
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2r00001100 2r00000000 |
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2r00011111 2r11111000 |
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2r00011111 2r11111000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000]). |
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^ characters |
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! |
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smilyGlyhps |
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"return the bitmap array for a smily font |
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(only contains glyphs for $a, $b and $c)" |
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|characters| |
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characters := Array new:256. |
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characters |
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at:(Character space codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000 |
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2r00000000 2r00000000]). |
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||
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characters |
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at:($a codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000001 2r10000000 |
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2r00001110 2r01110000 |
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2r00011000 2r00011000 |
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2r00100000 2r00000100 |
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2r01100110 2r01100110 |
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2r01000110 2r01100010 |
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2r01000000 2r00000010 |
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2r10000001 2r00000001 |
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2r10000001 2r00000001 |
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2r01001000 2r00010010 |
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2r01001100 2r00110010 |
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2r01100111 2r11100110 |
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2r00100001 2r10000100 |
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2r00011000 2r00011000 |
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2r00001110 2r01110000 |
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2r00000001 2r10000000]). |
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characters |
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at:($b codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000001 2r10000000 |
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2r00001110 2r01110000 |
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2r00011000 2r00011000 |
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2r00100000 2r00000100 |
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2r01100110 2r01100110 |
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2r01000110 2r01100010 |
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2r01000000 2r00000010 |
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2r10000001 2r00000001 |
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2r10000001 2r00000001 |
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2r01000000 2r00000010 |
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2r01000001 2r10000010 |
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2r01100010 2r01000110 |
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2r00100010 2r01000100 |
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2r00011000 2r00011000 |
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2r00001110 2r01110000 |
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2r00000001 2r10000000]). |
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characters |
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at:($c codePoint + 1) |
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put:(Form |
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width:16 |
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height:16 |
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fromArray:#[2r00000001 2r10000000 |
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2r00001110 2r01110000 |
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2r00011000 2r00011000 |
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2r00100000 2r00000100 |
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2r01100110 2r01100110 |
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2r01000110 2r01100010 |
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2r01000000 2r00000010 |
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2r10000001 2r00000001 |
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2r10000001 2r00000001 |
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2r01000000 2r00000010 |
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2r01000001 2r10000010 |
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2r01100011 2r11000110 |
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2r00100011 2r11000100 |
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2r00011001 2r10011000 |
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2r00001110 2r01110000 |
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2r00000001 2r10000000]). |
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^ characters |
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! ! |
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!BitmapFont methodsFor:'accessing'! |
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glyphs:aGlyphArray |
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"set the glyphs array; that is the collection of |
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bitmaps - one for each character" |
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||
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characterBitmaps := aGlyphArray. |
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maxWidth := maxHeight := 0. |
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aGlyphArray do:[:glyph | glyph notNil ifTrue:[ |
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maxWidth := maxWidth max:(glyph width). |
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maxHeight := maxHeight max:(glyph height). |
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] |
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]. |
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ascent isNil ifTrue:[ascent := maxHeight]. |
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descent isNil ifTrue:[descent := 0]. |
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! |
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||
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setAscent:aNumber |
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"set the font's ascent; that is the number of pixels |
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above the baseline" |
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ascent := aNumber. |
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maxHeight := self maxAscent + (self maxDescent max:0) |
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! |
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||
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setDescent:aNumber |
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"set the font's ascent; that is the number of pixels |
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below the baseline" |
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descent := aNumber. |
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maxHeight := self maxAscent + (self maxDescent max:0). |
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! ! |
434 |
||
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!BitmapFont methodsFor:'drawing'! |
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||
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displayString:aString from:index1 to:index2 x:x0 y:y in:aGC opaque:opaque |
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"required protocol for new fonts: |
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- display part of a string, drawing foreground pixels only" |
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||
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|x| |
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x := x0. |
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index1 to:index2 do:[:index | |
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4077
ab3991c6a6b0
Use the ANSI-blessed #codePoint instead of deprecated #asciiValue
Stefan Vogel <sv@exept.de>
parents:
4039
diff
changeset
|
445 |
self drawCharacter:(aString at:index) codePoint in:aGC x:x y:y opaque:opaque. |
|
ab3991c6a6b0
Use the ANSI-blessed #codePoint instead of deprecated #asciiValue
Stefan Vogel <sv@exept.de>
parents:
4039
diff
changeset
|
446 |
x := x + (self widthOfCharacter:(aString at:index) codePoint) |
| 1088 | 447 |
] |
| 1154 | 448 |
! ! |
449 |
||
450 |
!BitmapFont methodsFor:'private - drawing'! |
|
| 1088 | 451 |
|
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drawCharacter:ascii in:aGC x:x y:y opaque:opaque |
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|glyph| |
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454 |
||
| 2545 | 455 |
glyph := characterBitmaps at:(ascii + 1) ifAbsent:nil. |
| 1088 | 456 |
glyph isNil ifTrue:[^ self]. |
| 3673 | 457 |
aGC displayForm:glyph x:x y:y-glyph height+descent opaque:opaque |
| 1088 | 458 |
! ! |
459 |
||
| 1154 | 460 |
!BitmapFont methodsFor:'private - queries'! |
461 |
||
| 3672 | 462 |
glyphOfCharacter:ascii |
| 1154 | 463 |
"return the height of a specific character" |
464 |
||
465 |
|glyph| |
|
466 |
||
| 2545 | 467 |
glyph := characterBitmaps at:(ascii + 1) ifAbsent:nil. |
| 1154 | 468 |
glyph isNil ifTrue:[ |
| 6080 | 469 |
glyph := characterBitmaps at:(Character space codePoint + 1). |
| 1154 | 470 |
]. |
| 3672 | 471 |
^ glyph |
472 |
! |
|
473 |
||
474 |
heightOfCharacter:ascii |
|
475 |
"return the height of a specific character" |
|
476 |
||
477 |
|glyph| |
|
478 |
||
479 |
glyph := self glyphOfCharacter:ascii. |
|
| 1154 | 480 |
glyph isNil ifTrue:[^ 0]. |
481 |
^ glyph height |
|
482 |
! |
|
483 |
||
484 |
widthOfCharacter:ascii |
|
485 |
"return the width of a specific character" |
|
486 |
||
487 |
|glyph| |
|
488 |
||
| 3672 | 489 |
glyph := self glyphOfCharacter:ascii. |
| 1154 | 490 |
glyph isNil ifTrue:[^ 0]. |
491 |
^ glyph width |
|
492 |
! ! |
|
493 |
||
| 1088 | 494 |
!BitmapFont methodsFor:'queries'! |
495 |
||
496 |
ascent |
|
497 |
"return the ascent - the number of pixels above the baseLine" |
|
498 |
||
499 |
^ ascent |
|
500 |
! |
|
501 |
||
502 |
ascentOn:aDevice |
|
| 2545 | 503 |
"return the descent - the number of pixels below the baseLine. |
504 |
Since I am not device dependent, return my pixel ascent." |
|
| 1088 | 505 |
|
| 2545 | 506 |
^ descent |
| 1088 | 507 |
! |
508 |
||
509 |
descent |
|
510 |
"return the descent - the number of pixels below the baseLine" |
|
511 |
||
| 4039 | 512 |
^ descent ? 0 |
| 1088 | 513 |
! |
514 |
||
515 |
descentOn:aDevice |
|
| 2545 | 516 |
"return the descent - the number of pixels below the baseLine. |
517 |
Since I am not device dependent, return my pixel descent." |
|
| 1088 | 518 |
|
519 |
^ descent |
|
520 |
! |
|
521 |
||
522 |
height |
|
523 |
"return the height - the height in pixels of the highest character" |
|
524 |
||
| 3672 | 525 |
^ self maxHeight |
| 1088 | 526 |
! |
527 |
||
528 |
heightOf:aString |
|
529 |
"return the height - the height in pixels of the highest character" |
|
530 |
||
| 3672 | 531 |
^ self maxHeight. |
| 1088 | 532 |
! |
533 |
||
534 |
heightOn:aDevice |
|
535 |
"return the height - the height in pixels of the highest character" |
|
536 |
||
| 3672 | 537 |
^ self maxHeight. |
| 1088 | 538 |
! |
539 |
||
540 |
isFixedWidth |
|
| 7347 | 541 |
"return true if all of the font's characters are equal in |
| 1088 | 542 |
width." |
543 |
||
| 3664 | 544 |
|w| |
545 |
||
546 |
characterBitmaps do:[:glyph | |wHere| |
|
547 |
glyph notNil ifTrue:[ |
|
548 |
wHere := glyph width. |
|
549 |
w isNil |
|
550 |
ifTrue:[ w := wHere ] |
|
551 |
ifFalse:[ w ~~ wHere ifTrue:[^ false]] |
|
552 |
] |
|
553 |
]. |
|
| 1088 | 554 |
^ true |
555 |
! |
|
556 |
||
557 |
maxAscent |
|
| 7579 | 558 |
"return the maximum ascent; |
559 |
that's the ascent of the highest character" |
|
| 1154 | 560 |
|
| 3672 | 561 |
ascent isNil ifTrue:[ |
| 4039 | 562 |
ascent := (self maxHeight - self descent) max:0 |
| 3672 | 563 |
]. |
| 1088 | 564 |
^ ascent. |
565 |
! |
|
566 |
||
| 1154 | 567 |
maxDescent |
| 7579 | 568 |
"return the maximum descent; |
569 |
that's the descent of the highest character" |
|
| 1154 | 570 |
|
| 3672 | 571 |
descent isNil ifTrue:[ |
572 |
descent := (self maxHeight - ascent) max:0 |
|
573 |
]. |
|
| 1154 | 574 |
^ descent. |
575 |
! |
|
576 |
||
| 1088 | 577 |
maxHeight |
| 7579 | 578 |
"return the maximum height; |
579 |
that's the height of the highest character" |
|
| 1154 | 580 |
|
| 4039 | 581 |
^ maxHeight ? 0 |
| 1088 | 582 |
! |
583 |
||
| 1154 | 584 |
maxWidth |
585 |
"return the maximum width - the width of the widest character in pixels" |
|
586 |
||
| 3672 | 587 |
^ maxWidth |
| 1154 | 588 |
! |
589 |
||
| 2545 | 590 |
onDevice:aDevice |
591 |
"return a device representation of the receiver. |
|
592 |
Since I am device independent, return the receiver." |
|
| 1088 | 593 |
|
594 |
^ self |
|
595 |
! |
|
596 |
||
597 |
width |
|
598 |
"return the width - the average width in pixels" |
|
599 |
||
| 3672 | 600 |
^ self maxWidth |
| 1088 | 601 |
! |
602 |
||
603 |
widthOf:aString from:start to:stop |
|
604 |
"return the width of a substring" |
|
605 |
||
606 |
|sumW| |
|
607 |
||
608 |
(stop < start) ifTrue:[^ 0]. |
|
609 |
sumW := 0. |
|
610 |
start to:stop do:[:index | |
|
|
4077
ab3991c6a6b0
Use the ANSI-blessed #codePoint instead of deprecated #asciiValue
Stefan Vogel <sv@exept.de>
parents:
4039
diff
changeset
|
611 |
sumW := sumW + (self widthOfCharacter:(aString at:index) codePoint) |
| 1088 | 612 |
]. |
613 |
^ sumW |
|
614 |
! |
|
615 |
||
| 1154 | 616 |
widthOf:aString from:startIndex to:endIndex on:aDevice |
617 |
"return the width of a substring" |
|
| 1088 | 618 |
|
| 1154 | 619 |
^ self widthOf:aString from:startIndex to:endIndex |
| 1088 | 620 |
! |
621 |
||
622 |
widthOn:aDevice |
|
623 |
"return the width - the average width in pixels" |
|
624 |
||
| 3672 | 625 |
^ self maxWidth |
| 1088 | 626 |
! ! |
627 |
||
628 |
!BitmapFont class methodsFor:'documentation'! |
|
629 |
||
630 |
version |
|
| 6931 | 631 |
^ '$Header$' |
| 1088 | 632 |
! ! |
| 6080 | 633 |