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copied!<p>The simplest way is to load a font map from a image, such as those generated by the <a href="http://www.lmnopc.com/bitmapfontbuilder/" rel="nofollow noreferrer">bitmap font builder</a> (I know it's windows but I can't find one for linux), eg:</p> <p><img src="https://i.stack.imgur.com/VFKM2.gif" alt="bitmap font example"></p> <p>The example is a 256x256 gif, though you may what to convert it to a png/tga/bmp. It's full ASCII mapped gird, 16x16 characters. Load the texture and use glTexCoord2f to line it up on your quad, and you should be good to go.</p> <p>Here's an example using a bitmap of the above:</p> <pre><code>unsigned texture = 0; void LoadTexture() { // load 24-bit bitmap texture unsigned offset, width, height, size; char *buffer; FILE *file = fopen("text.bmp", "rb"); if (file == NULL) return; fseek(file, 10, SEEK_SET); fread(&offset, 4, 1, file); fseek(file, 18, SEEK_SET); fread(&width, 1, 4, file); fread(&height, 1, 4, file); size = width * height * 3; buffer = new char[size]; fseek(file, offset, SEEK_SET); fread(buffer, 1, size, file); glEnable(GL_TEXTURE_2D); glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer); fclose(file); printf("Loaded\n"); } void DrawCharacter(char c) { int column = c % 16, row = c / 16; float x, y, inc = 1.f / 16.f; x = column * inc; y = 1 - (row * inc) - inc; glBegin(GL_QUADS); glTexCoord2f( x, y); glVertex3f( 0.f, 0.f, 0.f); glTexCoord2f( x, y + inc); glVertex3f( 0.f, 1.f, 0.f); glTexCoord2f( x + inc, y + inc); glVertex3f( 1.f, 1.f, 0.f); glTexCoord2f( x + inc, y); glVertex3f( 1.f, 0.f, 0.f); glEnd(); } </code></pre>

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