projects/mde: mde/resource/FontTexture.d annotate

author	Diggory Hardy <diggory.hardy@gmail.com>
date	Sat, 31 May 2008 12:40:26 +0100
parents
children	bca7e2342d77

rev	line source
48 a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	1 /* LICENSE BLOCK
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	2 Part of mde: a Modular D game-oriented Engine
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	3 Copyright © 2007-2008 Diggory Hardy
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	4
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	5 This program is free software: you can redistribute it and/or modify it under the terms
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	6 of the GNU General Public License as published by the Free Software Foundation, either
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	7 version 2 of the License, or (at your option) any later version.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	8
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	11 See the GNU General Public License for more details.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	12
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	13 You should have received a copy of the GNU General Public License
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	15
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	16 /** Font caching system.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	17 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	18 * Three types of coordinates get used in the system: FreeType coordinates for each glyph, texture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	19 * coordinates, and OpenGL's model/world coordinates (for rendering). The freetype and texture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	20 * coords are cartesian (i.e. y increases upwards), although largely this is too abstract to
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	21 * matter. However, for the model/world coords, y increases downwards. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	22 module mde.resource.FontTexture;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	23
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	24 import mde.resource.exception;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	25
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	26 import derelict.freetype.ft;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	27 import derelict.opengl.gl;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	28
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	29 import Utf = tango.text.convert.Utf;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	30 import tango.util.log.Log : Log, Logger;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	31 import tango.io.Stdout;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	32
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	33 private Logger logger;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	34 static this () {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	35 logger = Log.getLogger ("mde.resource.FontTexture");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	36 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	37
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	38 auto hinting = FT_LOAD_TARGET_NORMAL; //or FT_LOAD_TARGET_LCD (or others)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	39 //FIXME: allow setting lcd filtering
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	40 auto lcdFilter = FT_LcdFilter.FT_LCD_FILTER_DEFAULT; //altertives: NONE, LIGHT
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	41 static const int dimW = 256, dimH = 256; // Texture size
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	42 const wFactor = 1f / dimW;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	43 const hFactor = 1f / dimH;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	44
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	45 /** A FontTexture is basically a cache of all font glyphs rendered so far.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	46 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	47 * This class should be limited to code for rendering to (and otherwise handling) textures and
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	48 * rendering fonts to the screen.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	49 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	50 * Technically, there's no reason it shouldn't be a static part of the FontStyle class. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	51 class FontTexture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	52 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	53 this () {}
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	54 ~this () {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	55 foreach (t; tex) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	56 glDeleteTextures (1, &(t.texID));
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	57 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	58 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	59
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	60 // Call if font(s) have been changed and glyphs must be recached.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	61 void clear () {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	62 foreach (t; tex) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	63 glDeleteTextures (1, &(t.texID));
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	64 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	65 cachedGlyphs = null;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	66 ++cacheVer;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	67 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	68
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	69
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	70 /** Cache informatation for rendering a block of text.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	71 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	72 * Recognises '\r', '\n' and "\r\n" as end-of-line markers. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	73 void updateCache (FT_Face face, char[] str, ref TextBlock cache)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	74 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	75 debug scope (failure)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	76 logger.warn ("updateCache failed");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	77
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	78 if (cache.cacheVer == cacheVer) // Existing cache is up-to-date
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	79 return;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	80
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	81 cache.cacheVer = cacheVer;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	82
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	83 /* Convert the string to an array of character codes (which is equivalent to decoding UTF8
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	84 * to UTF32 since no character code is ever > dchar.max). */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	85 static dchar[] chrs; // keep memory for future calls (NOTE: change for threading)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	86 chrs = Utf.toString32 (str, chrs);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	87
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	88 // Allocate space.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	89 // Since end-of-line chars get excluded, will often be slightly larger than necessary.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	90 cache.chars.length = chrs.length;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	91 cache.chars.length = 0;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	92
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	93 int lineSep = face.size.metrics.height >> 6;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	94 bool hasKerning = (FT_HAS_KERNING (face) != 0);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	95 int y = 0;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	96 CharCache cc; // struct; reused for each character
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	97
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	98 for (size_t i = 0; i < chrs.length; ++i)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	99 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	100 // First, get maxmimal yMax for the current line.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	101 int yMax = 0; // Maximal glyph height above baseline.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	102 for (size_t j = i; j < chrs.length; ++j)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	103 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	104 if (chrs[j] == '\n' \|\| chrs[j] == '\r') // end of line
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	105 break;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	106
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	107 GlyphAttribs* ga = chrs[j] in cachedGlyphs;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	108 if (ga is null) { // Not cached
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	109 addGlyph (face, chrs[j]); // so render it
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	110 ga = chrs[j] in cachedGlyphs; // get the ref of the copy we've stored
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	111 assert (ga !is null, "ga is null: 1");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	112 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	113
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	114 if (ga.top > yMax)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	115 yMax = ga.top;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	116 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	117 y += yMax;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	118
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	119 // Now for the current line:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	120 int x = 0; // x pos for next glyph
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	121 uint gi_prev = 0; // previous glyph index (needed for kerning)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	122 for (; i < chrs.length; ++i)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	123 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	124 // If end-of-line, break to find yMax for next line.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	125 if (chrs.length >= i+2 && chrs[i..i+2] == "\r\n"d) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	126 ++i;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	127 break;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	128 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	129 if (chrs[i] == '\n' \|\| chrs[i] == '\r') {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	130 break;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	131 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	132
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	133 cc.ga = chrs[i] in cachedGlyphs;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	134 assert (cc.ga !is null, "ga is null: 2");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	135
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	136 // Kerning
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	137 if (hasKerning && (gi_prev != 0)) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	138 FT_Vector delta;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	139 FT_Get_Kerning (face, gi_prev, cc.ga.index, FT_Kerning_Mode.FT_KERNING_DEFAULT, &delta);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	140 x += delta.x >> 6;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	141 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	142
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	143 // ga.left component: adding this slightly improves glyph layout. Note that the
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	144 // left-most glyph on a line may not start right on the edge, but this looks best.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	145 cc.xPos = x + cc.ga.left;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	146 cc.yPos = y - cc.ga.top;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	147 x += cc.ga.advanceX;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	148
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	149 cache.chars ~= cc;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	150 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	151 // Now increment i and continue with the next line if there is one.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	152 y += lineSep - yMax;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	153 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	154 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	155
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	156 /** Render a block of text using a cache. Updates the cache if necessary. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	157 void drawTextCache (FT_Face face, char[] str, ref TextBlock cache, int x, int y) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	158 updateCache (face, str, cache); // update if necessary
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	159 debug scope (failure)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	160 logger.warn ("drawTextCache failed");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	161
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	162 glEnable (GL_TEXTURE_2D);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	163 glEnable(GL_BLEND);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	164 glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_COLOR);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	165
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	166 foreach (chr; cache.chars) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	167 GlyphAttribs* ga = chr.ga;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	168
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	169 glBindTexture(GL_TEXTURE_2D, ga.texID);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	170
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	171 int x1 = x + chr.xPos;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	172 int y1 = y + chr.yPos;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	173 int x2 = x1 + ga.w;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	174 int y2 = y1 + ga.h;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	175 float tx1 = ga.x * wFactor;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	176 float ty1 = ga.y * hFactor;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	177 float tx2 = (ga.x + ga.w) * wFactor;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	178 float ty2 = (ga.y + ga.h) * hFactor;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	179
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	180 glBegin (GL_QUADS);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	181 glTexCoord2f (tx1, ty1); glVertex2i (x1, y1);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	182 glTexCoord2f (tx2, ty1); glVertex2i (x2, y1);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	183 glTexCoord2f (tx2, ty2); glVertex2i (x2, y2);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	184 glTexCoord2f (tx1, ty2); glVertex2i (x1, y2);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	185 glEnd ();
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	186 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	187
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	188 glDisable(GL_BLEND);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	189 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	190
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	191 void addGlyph (FT_Face face, dchar chr) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	192 debug scope (failure)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	193 logger.warn ("FontTexture.addGlyph failed!");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	194 //Stdout ("Adding glyph ")(chr).newline;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	195 auto gi = FT_Get_Char_Index (face, chr);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	196 auto g = face.glyph;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	197
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	198 if (FT_Load_Glyph (face, gi, FT_LOAD_RENDER \| hinting))
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	199 throw new fontGlyphException ("Unable to render glyph");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	200
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	201 auto b = g.bitmap;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	202 if (b.pitch != b.width) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	203 char[128] tmp;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	204 logger.warn (logger.format (tmp, "b.pitch is {}, b.width is {}", b.pitch, b.width));
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	205 //throw new fontGlyphException ("Unsupported freetype bitmap: b.pitch != b.width");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	206 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	207 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	208 glPixelStorei (GL_UNPACK_ROW_LENGTH, b.pitch);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	209
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	210 GlyphAttribs ga;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	211 ga.w = b.width;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	212 ga.h = b.rows;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	213 ga.left = g.bitmap_left;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	214 ga.top = g.bitmap_top;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	215 ga.advanceX = g.advance.x >> 6;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	216 ga.index = gi;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	217 Stdout ("Glyph left is: ")(ga.left).newline;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	218
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	219 foreach (ref t; tex) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	220 if (t.addGlyph (ga))
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	221 goto gotTexSpace;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	222 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	223 // if here, no existing texture had the room for the glyph so create a new texture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	224 // NOTE: check if using more than one texture impacts performance due to texture switching
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	225 logger.info ("Creating a font texture.");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	226 tex ~= TexPacker.create();
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	227 assert (tex[$-1].addGlyph (ga), "Failed to fit glyph in a new texture but addGlyph didn't throw");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	228
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	229 gotTexSpace:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	230 glBindTexture(GL_TEXTURE_2D, ga.texID);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	231 GLenum format;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	232 if (b.pixel_mode == FT_Pixel_Mode.FT_PIXEL_MODE_GRAY && b.num_grays == 256)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	233 format = GL_LUMINANCE;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	234 else if (b.pixel_mode == FT_Pixel_Mode.FT_PIXEL_MODE_LCD \|\|
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	235 b.pixel_mode == FT_Pixel_Mode.FT_PIXEL_MODE_LCD_V)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	236 format = GL_RGB;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	237 else
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	238 throw new fontGlyphException ("Unsupported freetype bitmap format");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	239
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	240 glTexSubImage2D(GL_TEXTURE_2D, 0,
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	241 ga.x, ga.y,
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	242 ga.w, ga.h,
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	243 format, GL_UNSIGNED_BYTE,
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	244 cast(void*) b.buffer);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	245
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	246 cachedGlyphs[chr] = ga;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	247 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	248
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	249 void drawTexture () { // temp func
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	250 if (tex.length == 0) return;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	251 glBindTexture(GL_TEXTURE_2D, tex[0].texID);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	252 glEnable (GL_TEXTURE_2D);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	253 glEnable(GL_BLEND);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	254 glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_COLOR);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	255
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	256 glBegin (GL_QUADS);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	257 glTexCoord2f (0f, 0f); glVertex2i (0, 0);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	258 glTexCoord2f (1f, 0f); glVertex2i (dimW, 0);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	259 glTexCoord2f (1f, 1f); glVertex2i (dimW, dimH);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	260 glTexCoord2f (0f, 1f); glVertex2i (0, dimH);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	261 glEnd ();
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	262
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	263 glDisable(GL_BLEND);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	264 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	265
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	266 private:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	267 TexPacker[] tex; // contains the gl texture id and packing data
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	268
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	269 GlyphAttribs[dchar] cachedGlyphs;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	270 int cacheVer = 0; // version of cache, used to make sure TextBlock caches are current.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	271 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	272
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	273 // Use LinePacker for our texture packer:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	274 alias LinePacker TexPacker;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	275
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	276 /** Represents one gl texture; packs glyphs into lines. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	277 struct LinePacker
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	278 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	279 // create a new texture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	280 static LinePacker create () {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	281 LinePacker p;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	282 //FIXME: check for error?
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	283 //glGenTextures (1, &(p.texID));
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	284 p.texID = 0;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	285 //FIXME: why do I get a blank texture when using bind?
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	286 glBindTexture(GL_TEXTURE_2D, p.texID);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	287
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	288 // add a pretty background to the texture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	289 static if (false) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	290 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	291 glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	292 ubyte[3][dimH][dimW] testTex;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	293 for (size_t i = 0; i < dimW; ++i)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	294 for (size_t j = 0; j < dimH; ++j)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	295 {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	296 testTex[i][j][0] = cast(ubyte) (i + j);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	297 testTex[i][j][1] = cast(ubyte) i;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	298 testTex[i][j][2] = cast(ubyte) j;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	299 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	300 void* ptr = testTex.ptr;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	301 } else
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	302 const void* ptr = null;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	303
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	304 // Create a texture without initialising values.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	305 glTexImage2D(GL_TEXTURE_2D, 0, 3,
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	306 dimW, dimH, 0,
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	307 GL_RGB, GL_UNSIGNED_BYTE, ptr);
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	308 return p;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	309 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	310
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	311 /** Find space for a glyph of size attr.w, attr.h within the texture.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	312 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	313 * Throws: fontGlyphException if glyph dimensions are larger than the texture.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	314 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	315 * Returns false if unable to fit the glyph into the texture, true if successful. If
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	316 * successful, attr's x and y are set to suitible positions such that the rect given by attr's
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	317 * x, y, w & h is a valid subregion of the texture. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	318 bool addGlyph (ref GlyphAttribs attr) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	319 if (attr.w > dimW \|\| attr.h > dimH)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	320 throw new fontGlyphException ("Glyph too large to fit texture!");
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	321
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	322 bool cantFitExtraLine = nextYPos + attr.h >= dimH;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	323 foreach (ref line; lines) {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	324 if (line.length + attr.w <= dimW && // if sufficient length and
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	325 line.height >= attr.h && // sufficient height and
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	326 (cantFitExtraLine \|\| // either there's not room for another line
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	327 line.height <= attr.h * WASTE_H)) // or we're not wasting much vertical space
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	328 { // then use this line
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	329 attr.x = line.length;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	330 attr.y = line.yPos;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	331 attr.texID = texID;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	332 line.length += attr.w;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	333 return true;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	334 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	335 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	336 // If we didn't return, we didn't use an existing line.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	337 if (cantFitExtraLine) // run out of room
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	338 return false;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	339
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	340 // Still room: add a new line. The new line has the largest yPos (furthest down texture),
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	341 // but the lines array must remain ordered by line height (lowest to heighest).
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	342 Line line;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	343 line.yPos = nextYPos;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	344 line.height = attr.h * EXTRA_H;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	345 line.length = attr.w;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	346 size_t i = 0;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	347 while (i < lines.length && lines[i].height < line.height) ++i;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	348 lines = lines[0..i] ~ line ~ lines[i..$]; // keep lines sorted by height
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	349 nextYPos += line.height;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	350
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	351 attr.x = 0; // first glyph in the line
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	352 attr.y = line.yPos;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	353 attr.texID = texID;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	354 return true;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	355 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	356
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	357 // Publically accessible data:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	358 uint texID; // OpenGL texture identifier (for BindTexture)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	359
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	360 private:
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	361 const WASTE_H = 1.3;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	362 const EXTRA_H = 1; // can be float/double, just experimenting with 1
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	363 struct Line {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	364 int yPos; // y position (xPos is always 0)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	365 int height;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	366 int length;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	367 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	368 Line[] lines;
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	369 int nextYPos = 0; // y position for next created line (0 for first line)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	370 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	371
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	372 struct GlyphAttribs {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	373 int x, y; // position within texture
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	374 int w, h; // bitmap size
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	375
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	376 int left, top; // bitmap_left, bitmap_top fields
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	377 int advanceX; // horizontal advance distance
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	378 uint index; // glyph index (within face)
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	379
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	380 uint texID; // gl tex identifier
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	381 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	382
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	383 /** Cached information for drawing a block of text.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	384 *
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	385 * Struct should be stored externally and updated via references. */
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	386 struct TextBlock {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	387 CharCache[] chars; // All chars. They hold x & y pos. info, so don't need to know about lines.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	388 int cacheVer = -1; // this is checked on access, and must equal for cache to be valid.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	389 int w, h; /// Size of the block. Likely the only fields of use outside the library.
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	390 }
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	391 struct CharCache {
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	392 GlyphAttribs* ga; // character
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	393 int xPos, yPos; // x,y position
a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD). Diggory Hardy <diggory.hardy@gmail.com> parents: diff changeset	394 }

48

a98ffb64f066 Implemented font rendering (grayscale only; i.e. non-LCD).