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annotate mde/gl/draw.d @ 48:a98ffb64f066

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Implemented font rendering (grayscale only; i.e. non-LCD). FontTexture creates a texture and caches glyphs. Font supports multiple styles/faces, loaded from config file (should probably be loaded via Options instead). TextBlock cache for glyph placement within a string. committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 31 May 2008 12:40:26 +0100
parents 0fd51d2c6c8a
children bca7e2342d77
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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 /** The OpenGL draw loop.
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17 *
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18 * Everything here is really intended as makeshift code to enable GUI development. */
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19 module mde.gl.draw;
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21 import mde.gui.Gui;
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23 import derelict.sdl.sdl;
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24 import derelict.opengl.gl;
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26 import tango.time.Time; // TimeSpan (type only; unused)
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27 import tango.util.log.Log : Log, Logger;
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29 import mde.resource.font;
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30 private Logger logger;
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31 static this () {
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32 logger = Log.getLogger ("mde.gl.draw");
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33 }
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35 //BEGIN Drawing loop
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36 // Temporary draw function
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37 void draw (TimeSpan) {
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38 glClear(GL_COLOR_BUFFER_BIT);
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40 gui.draw ();
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41 FontStyle.drawTexture;
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43 GLenum err = glGetError();
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44 if (err != GL_NO_ERROR) {
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45 char[128] tmp;
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46 logger.error (logger.format (tmp, "GL error: {}", err));
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47 }
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49 glFinish(); // Use Finish rather than Flush to make sure gl is ready to swap buffers
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50 SDL_GL_SwapBuffers();
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51 }
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52 //END Drawing loop