79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
/* This file is part of the Pangolin Project.
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* http://github.com/stevenlovegrove/Pangolin
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*
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* Copyright (c) 2015 Steven Lovegrove
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <pangolin/gl/gltext.h>
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#include <cstdio>
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#include <cstdarg>
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namespace pangolin {
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class PANGOLIN_EXPORT GlFont
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{
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public:
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// Singleton instance if requested.
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static GlFont& I();
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// Load GL Font data. Delay uploading as texture until first use.
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GlFont(const unsigned char* ttf_buffer, float pixel_height, int tex_w=512, int tex_h=512);
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GlFont(const std::string& filename, float pixel_height, int tex_w=512, int tex_h=512);
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virtual ~GlFont();
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// Generate renderable GlText object from this font.
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GlText Text( const char* fmt, ... );
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GlText Text( const std::string& str );
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inline float Height() const {
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return font_height_px;
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}
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protected:
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void InitialiseFont(const unsigned char* ttf_buffer, float pixel_height, int tex_w, int tex_h);
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// This can only be called once GL context is initialised
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void InitialiseGlTexture();
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const static int FIRST_CHAR = 32;
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const static int NUM_CHARS = 96;
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float font_height_px;
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int tex_w;
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int tex_h;
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unsigned char* font_bitmap;
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GlTexture mTex;
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GlChar chardata[NUM_CHARS];
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GLfloat kern_table[NUM_CHARS*NUM_CHARS];
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};
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}
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