85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
#ifndef INCLUDED_FONT
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#define INCLUDED_FONT
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_OUTLINE_H
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#include FT_BBOX_H
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// Make my IDE a little happier:
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#if 0
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#include "freetype/freetype.h"
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#include "freetype/freetype_defs.h"
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#include "freetype/ftimage.h"
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#include "freetype/fttypes.h"
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#include "freetype/ftbbox.h"
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#include "freetype/ftoutln.h"
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#endif
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class FontRenderer
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{
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public:
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// Two fonts are required - a primary (0) font which will be used first,
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// and a secondary (1) font for filling in missing glyphs.
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// (The secondary font should usually be Arial Unicode MS).
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FontRenderer(const char* filename0, const char* filename1, double ptsize, bool unpatented_hinting, bool hinting);
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~FontRenderer();
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// Generate the glyph for the given Unicode code point. Returns the glyph index.
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int LoadGlyph(const int charcode);
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// Put the appropriate pixel sizes into width and height
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void GetBoundingBox(int& width, int& height);
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// Copy the glyph onto a 24-bit RGB image buffer
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// pos_left / pos_top: Position to put the origin (usually bottom left corner) of the glyph.
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// Altered by the function to point towards the next character.
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// width / height: of bitmap, to do clipping
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// pitch: Bytes per row, including any padding
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// single_glyph: If true, doesn't update the cursor and draws with the bounding box at pos_left/top
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void RenderGlyph(unsigned char* rgb_buffer, int& pos_left, int& pos_top, int width, int height, int pitch, bool single_glyph);
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// Returns baseline-to-baseline distance, including the desired leading
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int GetLineSpacing();
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// Supplies some information for positioning glyphs
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void GetMetrics(int& offset_x, int& offset_y, int& advance);
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int GetKerning(int left, int right);
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// Set by LoadGlyph if it can't find the right glyph
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bool Missing;
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/////////////////////////////////////////////////////////
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// Font settings, set by users and used by this class:
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// Shear angle (in degrees) for fake italics
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int Italicness;
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// 0 for standard; otherwise draws n+1 overlapping copies of the text
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int Boldness;
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// Additional spacing between each non-zero-width glyph and the next
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int Tracking;
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// Additional spacing between lines
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int Leading;
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// Whether to draw an outlined font
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bool Outline;
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private:
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FT_Library FontLibrary0;
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FT_Library FontLibrary1;
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FT_Face FontFace0;
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FT_Face FontFace1;
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FT_Face LastFontFace; // = FontFace(0|1), depending on the last LoadGlyph
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};
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#endif // INCLUDED_FONT
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