chromium/third_party/angle/third_party/glmark2/src/src/text-renderer.cpp

/*
 * Copyright © 2011 Linaro Limited
 *
 * This file is part of the glmark2 OpenGL (ES) 2.0 benchmark.
 *
 * glmark2 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * glmark2 is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * glmark2.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *  Alexandros Frantzis (glmark2)
 */
#include "text-renderer.h"
#include "gl-headers.h"
#include "options.h"
#include "scene.h"
#include "shader-source.h"
#include "vec.h"
#include "mat.h"
#include "texture.h"

vec2;
mat4;

/* These are specific to the glyph texture atlas we are using */
static const unsigned int texture_size(512);
static const vec2 glyph_size_pixels(29.0, 57.0);
static const vec2 glyph_size(glyph_size_pixels/texture_size);

/******************
 * Public methods *
 ******************/

/**
 * TextRenderer default constructor.
 */
TextRenderer::TextRenderer(Canvas& canvas) : … { … }

TextRenderer::~TextRenderer()
{ … }

/**
 * Sets the text string to render.
 *
 * @param t the text string
 */
void
TextRenderer::text(const std::string& t)
{ … }

/**
 * Sets the screen position to render at.
 *
 * @param t the position
 */
void
TextRenderer::position(const LibMatrix::vec2& p)
{ … }

/**
 * Sets the size of each rendered glyph.
 *
 * The size corresponds to the width of each glyph
 * in normalized screen coordinates.
 *
 * @param s the size of each glyph
 */
void
TextRenderer::size(float s)
{ … }

/**
 * Renders the text.
 */
void
TextRenderer::render()
{ … }

/*******************
 * Private methods *
 *******************/

/**
 * Creates the geometry needed to render the text.
 *
 * This method assumes that the text VBOs are properly bound.
 */
void
TextRenderer::create_geometry()
{ … }

/**
 * Gets the texcoords of a glyph in the glyph texture atlas.
 *
 * @param c the character to get the glyph texcoords of
 *
 * @return the texcoords
 */
vec2
TextRenderer::get_glyph_coords(char c)
{ … }