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annotate mde/resource/font.d @ 49:bca7e2342d77

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Enabled getting the size of a text block (before or after rendering). committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 31 May 2008 13:10:06 +0100
parents a98ffb64f066
children f68ae1d667f9
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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4
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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15
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16 /// Sets up freetype (in a basic way).
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17 module mde.resource.font;
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18
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19 import mde.resource.FontTexture;
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20 import mde.resource.exception;
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21
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22 import mde.mergetag.Reader;
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23 import mde.mergetag.DataSet;
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24 import mde.mergetag.exception;
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25 import mde.resource.paths;
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26
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27 import derelict.freetype.ft;
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28 import derelict.opengl.gl;
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30 import tango.scrapple.text.convert.parseTo : parseTo;
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31 import tango.stdc.stringz;
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32 import Util = tango.text.Util;
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33 import tango.util.log.Log : Log, Logger;
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34
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35 // "Publically import" this symbol:
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36 alias mde.resource.FontTexture.TextBlock TextBlock;
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37
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38 private Logger logger;
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39 static this () {
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40 logger = Log.getLogger ("mde.resource.font");
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41 }
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42
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43 /** FontStyle class.
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44 *
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45 * Particular to a font and size, and any other effects like bold/italic if ever implemented.
45
0fd51d2c6c8a Several changes to resising windows and layout widgets. This commit still has some bugs.
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46 *
0fd51d2c6c8a Several changes to resising windows and layout widgets. This commit still has some bugs.
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47 * Note: it is not currently intended to be thread-safe. */
48
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48 class FontStyle : IDataSection
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49 {
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50 //BEGIN Static: manager
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51 static {
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52 debug void drawTexture() {
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53 if (fontTex !is null)
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54 fontTex.drawTexture;
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55 }
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56
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57 /** Load the freetype library. */
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58 void initialize () {
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59 if (!confDir.exists (fileName))
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60 throw new fontException ("No font settings file (fonts.[mtt|mtb])");
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61
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62 if (FT_Init_FreeType (&library))
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63 throw new fontException ("error initialising the FreeType library");
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64
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65 // Check version
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66 FT_Int maj, min, patch;
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67 FT_Library_Version (library, &maj, &min, &patch);
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68 if (maj != 2 || min != 3) {
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69 char[128] tmp;
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70 logger.warn (logger.format (tmp, "Using an untested FreeType version: {}.{}.{}", maj, min, patch));
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71 }
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72
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73 /* Load font settings
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74 *
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75 * Each mergetag section corresponds to a font; each is loaded whether used or not
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76 * (however the actual font files are only loaded on use). A fallback id must be
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77 * provided in the header which must match a loaded font name; if a non-existant font
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78 * is requested a warning will be logged and this font returned. */
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79 char[] fallbackName;
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80 try {
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81 IReader reader;
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82 reader = confDir.makeMTReader (fileName, PRIORITY.LOW_HIGH, null, true);
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83 reader.dataSecCreator = delegate IDataSection(ID id) {
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84 auto f = new FontStyle;
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85 fonts[id] = f;
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86 return f;
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87 };
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88 reader.read;
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89
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90 // get fallback name
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91 char[]* p = "fallback" in reader.dataset.header.Arg!(char[]).Arg;
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92 if (p is null)
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93 throw new fontException ("No fallback font style specified");
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94 fallbackName = *p;
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95 }
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96 catch (MTException e) {
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97 throw new fontException ("Mergetag exception: "~e.msg);
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98 }
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99
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100 // Find the fallback
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101 FontStyle* p = fallbackName in fonts;
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102 if (p is null)
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103 throw new fontException ("Fallback font style specified is not found");
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104 fallback = *p;
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105 // Load the fallback now, to ensure it's available.
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106 // Also note that get() doesn't make sure the fallback is loaded before returning it.
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107 fallback.load;
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108 }
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109 private const fileName = "fonts";
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110
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111 //FIXME: don't use GC for FontStyle resources
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112 /** Cleanup: delete all fonts. */
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113 void cleanup () {
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114 FT_Done_FreeType (library);
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115 }
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116
48
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117 /** Get a FontStyle instance, for a section in the fonts.mtt file.
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118 *
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119 * Also loads the font if it's not already loaded, so the first call may take some time.
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120 *
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121 * Uses fallback font-style if the desired style isn't known about or fails to load, so
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122 * this function should never fail or throw, in theory (unless out of memory). The
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123 * fallback should already be loaded. */
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124 FontStyle get(char[] name) {
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125 FontStyle* p = name in fonts;
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126 if (p is null) {
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127 logger.warn ("Font style "~name~" requested but not found; reverting to the fallback style.");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
128 fonts[name] = fallback; // set to prevent another warning getting logged
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
129 return fallback;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
130 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
131 // Got it, but we need to make sure it's loaded:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
132 try {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
133 p.load;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
134 } catch (Exception e) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
135 logger.warn ("Font style "~name~" failed to load; reverting to the fallback style.");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
136 return fallback;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
137 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
138 return *p;
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
139 }
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
140
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
141 private:
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
142 FT_Library library;
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
143 FontTexture fontTex;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
144 FontStyle[ID] fonts; // all font styles known about; not necessarily loaded
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
145 FontStyle fallback; // used when requested font isn't in fonts
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
146 }
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
147 //END Static
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
148
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
149 this() {}
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
150
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
151 //BEGIN Mergetag code
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diff changeset
152 //NOTE: would it be better not to use a new mergetag file for this?
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
153 //FIXME: revise when gui can set options
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Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
154 void addTag (char[] tp, ID id, char[] dt) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
155 if (tp == "char[]") {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
156 if (id == "path")
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
157 path = parseTo!(char[]) (dt);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
158 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
159 else if (tp == "int") {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
160 if (id == "size")
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
161 size = parseTo!(int) (dt);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
162 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
163 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
164 void writeAll (ItemDelg) {} // no writing the config for now
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
165 //END Mergetag code
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
166
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
167 /** Load the font file.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
168 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
169 * Even if the same font is used at multiple sizes, multiple copies of FT_Face are used.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
170 * Sharing an FT_Face would require calling FT_Set_Pixel_Sizes each time a glyph is rendered or
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
171 * swapping the size information (face.size)? */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
172 void load ()
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
173 in {
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
174 assert (library !is null, "font: library is null");
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
175 } body {
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
176 if (FT_New_Face (library, toStringz(path), 0, &face))
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
177 throw new fontLoadException ("Unable to read font: "~path);
07bd1a09e161 Started implementing text rendering.
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parents:
diff changeset
178
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
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diff changeset
179 if (!FT_IS_SCALABLE (face))
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
180 throw new fontLoadException ("Currently no support for non-scalable fonts (which " ~
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
181 path ~ " is). Please report if you want to see support.");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
182 /* The following will need to be addressed when adding support for non-scalables:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
183 * Use of face.size.metrics.height property.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
184 */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
185
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
186 if (FT_Set_Pixel_Sizes (face, 0,size))
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
187 throw new fontLoadException ("Unable to set pixel size");
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
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diff changeset
188
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
189 // Create if necessary:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
190 if (fontTex is null)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
191 fontTex = new FontTexture;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
192 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
193
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
194 /** Update a TextBlock cache, as used by the textBlock function.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
195 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
196 * The only use of this is to get the text block's size ahead of rendering, via TextBlock's w
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
197 * and h properties.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
198 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
199 * This function will only actually update the cache if it is invalid, caused either by the
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
200 * font being changed or if cache.cacheVer < 0. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
201 void updateBlock (char[] str, ref TextBlock cache) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
202 fontTex.updateCache (face, str, cache);
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
203 }
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
204
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
205 /** Draw a block of text (may inlcude new-lines).
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
206 *
49
bca7e2342d77 Enabled getting the size of a text block (before or after rendering).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 48
diff changeset
207 * The text block is drawn with top-left corner at x,y. To put the text's baseline at a given
bca7e2342d77 Enabled getting the size of a text block (before or after rendering).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 48
diff changeset
208 * y coordinate would require some changes. Line height is currently variable, depending on the
bca7e2342d77 Enabled getting the size of a text block (before or after rendering).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 48
diff changeset
209 * highest glyph in the line.
bca7e2342d77 Enabled getting the size of a text block (before or after rendering).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 48
diff changeset
210 *
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
211 * As a CPU-side code optimisation, store a TextBlock (unique to str) and pass a reference as
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
212 * the cache argument. This is the recommended method, although for one-time calls when you
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
213 * don't need to know the size, the other version of textBlock may be used.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
214 * ---------------------------------
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
215 * char[] str;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
216 * TextBlock strCache;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
217 * textBlock (x, y, str, strCache);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
218 * ---------------------------------
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
219 * The TextBlock cache will be updated as necessary. Besides the initial update, this will only
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
220 * be if the font changes, or it is manually invalidated. This can be done by setting the
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
221 * TextBlock's cacheVer property to -1, which should be done if str is changed.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
222 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
223 * The TextBlock's w and h properties are set to the size (in pixels) of the text block; other
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
224 * than this cache only serves as a small optimisation. However, the only way to get the size
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
225 * of a text block is to use a TextBlock cache and update it, either with this function or with
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
226 * the updateBlock function. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
227 void textBlock (int x, int y, char[] str, ref TextBlock cache) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
228 try {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
229 fontTex.drawTextCache (face, str, cache, x, y);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
230 } catch (Exception e) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
231 logger.warn ("Exception while drawing text: "~e.msg);
44
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
232 }
07bd1a09e161 Started implementing text rendering.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
233 }
48
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
234 /** ditto */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
235 void textBlock (int x, int y, char[] str) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
236 try {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
237 // Using the cache method for one-time use is slightly less than optimal, but doing so
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
238 // isn't really recommended anyway (and maintaining two versions of fontTex.drawText
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
239 // would be horrible).
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
240 TextBlock cache;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
241 fontTex.drawTextCache (face, str, cache, x, y);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
242 } catch (Exception e) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
243 logger.warn ("Exception while drawing text: "~e.msg);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
244 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
245 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
246
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
247
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
248 /** The font-specified vertical distance between the baseline of consecutive lines. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
249 int getLineSeparation () {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).
Diggory Hardy <diggory.hardy@gmail.com>
parents: 45
diff changeset
250 return face.size.metrics.height >> 6;
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251 }
44
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252
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253 ~this () {
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254 FT_Done_Face (face);
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255 }
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256
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257 private:
48
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258 char[] path; // path to font file
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259 int size; // font size
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260
44
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261 FT_Face face;
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262 }