desgui.core.textrender source code

1 /+
2 The MIT License (MIT)
3 
4     Copyright (c) <2013> <Oleg Butko (deviator), Anton Akzhigitov (Akzwar)>
5 
6     Permission is hereby granted, free of charge, to any person obtaining a copy
7     of this software and associated documentation files (the "Software"), to deal
8     in the Software without restriction, including without limitation the rights
9     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10     copies of the Software, and to permit persons to whom the Software is
11     furnished to do so, subject to the following conditions:
12 
13     The above copyright notice and this permission notice shall be included in
14     all copies or substantial portions of the Software.
15 
16     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19     AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22     THE SOFTWARE.
23 +/
24 
25 module desgui.core.textrender;
26 
27 public import desmath.linear.vector,
28               desil.rect;
29 
30 public import desil.image;
31 
32 import desgui.core.except;
33 
34 import std..string;
35 
36 class DiTextRenderException: DiException
37 { 
38     this( string msg, string file=__FILE__, size_t line=__LINE__ ) @safe nothrow pure
39     { super( msg, file, line ); } 
40 }
41 
42 struct DiGlyphInfo
43 {
44     ivec2 pos, next;
45     @property ivec2 size() const { return ivec2( img.size ); }
46     Image img;
47 }
48 
49 struct DiGlyphParam
50 {
51     enum Flag
52     {
53         NONE        = cast(ubyte)0,
54         BOLD        = 0b0001,
55         ITALIC      = 0b0010,
56         UNDERLINE   = 0b0100,
57         STRIKED     = 0b1000
58     }
59 
60     ubyte flag = Flag.NONE;
61     uint height=12;
62     col4 color=col4(1,1,1,1);
63 }
64 
65 interface DiGlyphRender
66 {
67     void setParams( in DiGlyphParam p );
68     @property ImageType imtype() const;
69     DiGlyphInfo render( wchar ch );
70 }
71 
72 interface DiTextRender
73 {
74     DiGlyphInfo opCall( DiGlyphRender gr, in DiGlyphParam gp, wstring str );
75 }
76 
77 class DiBaseLineTextRender: DiTextRender
78 {
79     DiGlyphInfo opCall( DiGlyphRender gr, in DiGlyphParam param, wstring str )
80     {
81         if( gr is null ) 
82             throw new DiTextRenderException( "null glyph render" );
83 
84         DiGlyphInfo res;
85         res.img.allocate( imsize_t(1,1), gr.imtype );
86         if( str == "" ) return res;
87 
88         gr.setParams( param );
89         auto pen = ivec2( 0, 0 );
90 
91         DiGlyphInfo[] buf;
92 
93         irect max;
94 
95         {
96             auto g = gr.render( str[0] );
97             pen += g.next;
98             buf ~= g;
99             max = irect( g.pos, g.img.size );
100         }
101 
102         foreach( i, ch; str[1 .. $] )
103         {
104             auto g = gr.render( ch );
105             g.pos += pen;
106             pen += g.next;
107             buf ~= g;
108             max = max.expand( irect( g.pos, g.img.size ) );
109         }
110 
111         res.img.allocate( imsize_t(max.size), gr.imtype );
112 
113         foreach( g; buf )
114         {
115             auto pp = g.pos - max.pos;
116             res.img.paste( pp, g.img );
117             res.next += g.next;
118         }
119         res.pos = max.pos;
120 
121         return res;
122     }
123 }
124 
125 version(unittest)
126 {
127     package
128     {
129         ubyte[] data_t = 
130         [
131             0,2,3,4,0,
132             0,0,4,0,0,
133             0,0,5,0,0,
134             0,0,6,0,0,
135             0,0,7,0,0
136         ];
137 
138         ubyte[] data_t_str = 
139         [
140             0,2,3,4,0,
141             0,0,4,0,0,
142             8,8,8,8,8,
143             0,0,6,0,0,
144             0,0,7,0,0
145         ];
146 
147         ubyte[] data_e = 
148         [
149             0,1,2,3,0,
150             0,2,0,0,0,
151             0,3,4,5,0,
152             0,4,0,0,0,
153             0,5,6,7,0
154         ];
155 
156 
157         ubyte[] data_e_str = 
158         [
159             0,1,2,3,0,
160             0,2,0,0,0,
161             8,8,8,8,8,
162             0,4,0,0,0,
163             0,5,6,7,0
164         ];
165 
166         ubyte[] data_s = 
167         [
168             0,0,2,1,0,
169             0,3,0,0,0,
170             0,4,5,6,0,
171             0,0,0,7,0,
172             0,9,8,0,0
173         ];
174 
175         ubyte[] data_s_str = 
176         [
177             0,0,2,1,0,
178             0,3,0,0,0,
179             8,8,8,8,8,
180             0,0,0,7,0,
181             0,9,8,0,0
182         ];
183 
184         ubyte[] data_test_test =
185         [
186             0,2,3,4,0,0,0,1,2,3,0,0,0,0,2,1,0,0,0,2,3,4,0,0,0,0,0,0,0,2,3,4,0,0,0,1,2,3,0,0,0,0,2,1,0,0,0,2,3,4,0,
187             0,0,4,0,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,4,0,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,4,0,0,
188             0,0,5,0,0,0,0,3,4,5,0,0,0,4,5,6,0,0,0,0,5,0,0,0,0,0,0,0,0,0,5,0,0,0,0,3,4,5,0,0,0,4,5,6,0,0,0,0,5,0,0,
189             0,0,6,0,0,0,0,4,0,0,0,0,0,0,0,7,0,0,0,0,6,0,0,0,0,0,0,0,0,0,6,0,0,0,0,4,0,0,0,0,0,0,0,7,0,0,0,0,6,0,0,
190             0,0,7,0,0,0,0,5,6,7,0,0,0,9,8,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,7,0,0,0,0,5,6,7,0,0,0,9,8,0,0,0,0,0,7,0,0
191         ];
192 
193 
194         ubyte[] data_test_test_str =
195         [
196             0,2,3,4,0,0,0,1,2,3,0,0,0,0,2,1,0,0,0,2,3,4,0,0,0,0,0,0,0,2,3,4,0,0,0,1,2,3,0,0,0,0,2,1,0,0,0,2,3,4,0,
197             0,0,4,0,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,4,0,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,4,0,0,
198             8,8,8,8,8,0,8,8,8,8,8,0,8,8,8,8,8,0,8,8,8,8,8,0,0,0,0,0,8,8,8,8,8,0,8,8,8,8,8,0,8,8,8,8,8,0,8,8,8,8,8,
199             0,0,6,0,0,0,0,4,0,0,0,0,0,0,0,7,0,0,0,0,6,0,0,0,0,0,0,0,0,0,6,0,0,0,0,4,0,0,0,0,0,0,0,7,0,0,0,0,6,0,0,
200             0,0,7,0,0,0,0,5,6,7,0,0,0,9,8,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,7,0,0,0,0,5,6,7,0,0,0,9,8,0,0,0,0,0,7,0,0
201         ];
202 
203         class TestGlyphRender: DiGlyphRender
204         {
205             DiGlyphParam param;
206             void setParams( in DiGlyphParam p ){ param = p; }
207 
208             @property ImageType imtype() const
209             { return ImageType( ImCompType.UBYTE, 1 ); }
210 
211             DiGlyphInfo render( wchar ch )
212             {
213                 Image r;
214                 int offset = 6;
215                 ubyte[] dat;
216                 switch( ch )
217                 {
218                     case "t"w[0]: 
219                         dat = ( param.flag & param.Flag.STRIKED ) ? data_t_str : data_t;
220                         r.allocate( imsize_t(5,5), imtype, dat ); 
221                         offset = 6; 
222                         break;
223                     case "e"w[0]: 
224                         dat = ( param.flag & param.Flag.STRIKED ) ? data_e_str : data_e;
225                         r.allocate( imsize_t(5,5), imtype, dat); 
226                         offset = 6; 
227                         break;
228                     case "s"w[0]: 
229                         dat = ( param.flag & param.Flag.STRIKED ) ? data_s_str : data_s;
230                         r.allocate( imsize_t(5,5), imtype, dat ); 
231                         offset = 6; 
232                         break;
233                     default: r.allocate( imsize_t(3,5), imtype ); offset = 4; break;
234                 }
235                 return DiGlyphInfo( ivec2(0,-5), ivec2(offset,0), r );
236             }
237         }
238     }
239 }
240 
241 unittest
242 {
243     auto tgr = new TestGlyphRender;
244     auto bltr = new DiBaseLineTextRender;
245     DiGlyphParam gp;
246     auto res = bltr( tgr, gp, "test test" );
247 
248     assert( res.pos == ivec2( 0, -5 ) );
249     assert( res.img.size.w == 51 );
250     assert( res.img.size.h == 5 );
251 
252     auto timg = Image( imsize_t(51,5), tgr.imtype, data_test_test );
253 
254     assert( res.img == timg );
255 
256     gp.flag = gp.Flag.STRIKED;
257     res = bltr( tgr, gp, "test test" );
258 
259     auto timg2 = Image( imsize_t(51,5), tgr.imtype, data_test_test_str );
260     assert( res.img == timg2 );
261 
262 }