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FreeType.cs
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FreeType.cs
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#region License
/*
MIT License
Copyright ©2003-2007 Tao Framework Team
http://www.taoframework.com
All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#endregion License
#region Version
// based on http://www.koders.com/csharp/fid840ED1F892217853EE1DD8692B953A84E1D5C2AE.aspx
//
// Applicable to Freetype 2.1.9 or later
//
// 2007-Nov-9- Euan D MacInnes.
// Converted names to official FreeType names
// Added help text from FreeType website
//
// 2007-Nov-01 Euan D MacInnes. Amendments are to:
// Init_FreeType, to make the libptr "out"
// New_Face, to make the aface "out"
// NOTE: Some FreeType variables do not start with FT.
// Some structures exist here ***Rec_, that are currently unused.
// These were originally intended as typed pointer references.
// However IntPtr's have been used for now.
#endregion
using System;
using System.Collections;
using System.Runtime.InteropServices;
using System.Security;
namespace Tao.FreeType
{
#region Class Documentation
/// <summary>
/// FreeType 2 Binding for .NET
/// </summary>
/// <remarks>
/// <para>
/// Binds functions and definitions in
/// freetype6.dll (Windows)
/// /usr/lib/libfreetype.so.6 (Linux - specifically Fedora Core freetype install location)
/// /Library/Frameworks/Mono.framework/Libraries/libfreetype.6.dylib (MacOSX)
/// </para>
/// <para>
/// The FreeType library includes the base data types and function calls to FreeType 2
/// to allow access to TrueType and OpenType fonts across platforms.
/// </para>
/// <para>
/// This is not a rendering utility and will not render fonts to the screen. It is an interface
/// to the various font formats, and can provide either outline or bitmapped versions
/// of font glyphs.
/// </para>
/// </remarks>
#endregion Class Documentation
[StructLayout(LayoutKind.Sequential)]
public struct MemoryRec_
{
/// <summary>
///
/// </summary>
public IntPtr /*void*/ user;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ alloc;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ free;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ realloc;
}
/// <summary>
/// A structure used to describe an input stream.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_StreamRec
{
/// <summary>
///
/// </summary>
public IntPtr /*byte*/ _base;
/// <summary>
///
/// </summary>
public uint size;
/// <summary>
///
/// </summary>
public uint pos;
/// <summary>
///
/// </summary>
public FT_StreamDesc descriptor;
/// <summary>
///
/// </summary>
public FT_StreamDesc pathname;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ read;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ close;
/// <summary>
///
/// </summary>
public IntPtr /*MemoryRec_*/ memory;
/// <summary>
///
/// </summary>
public IntPtr /*byte*/ cursor;
/// <summary>
///
/// </summary>
public IntPtr /*byte*/ limit;
}
/// <summary>
/// A union type used to store either a long or a pointer. This is used to store a file descriptor or a ‘FILE*’ in an input stream
/// </summary>
[StructLayout(LayoutKind.Explicit)]
public struct FT_StreamDesc
{
/// <summary>
///
/// </summary>
[FieldOffset(0)]
public int _value;
/// <summary>
///
/// </summary>
[FieldOffset(0)]
public IntPtr /*void*/ pointer;
}
/// <summary>
/// A simple structure used to store a 2D vector; coordinates are of the FT_Pos type.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Vector
{
/// <summary>
///
/// </summary>
public int x;
/// <summary>
///
/// </summary>
public int y;
}
/// <summary>
/// A structure used to hold an outline's bounding box, i.e., the coordinates of its extrema in the horizontal and vertical directions.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_BBox
{
/// <summary>
///
/// </summary>
public int xMin;
/// <summary>
///
/// </summary>
public int yMin;
/// <summary>
///
/// </summary>
public int xMax;
/// <summary>
///
/// </summary>
public int yMax;
}
/// <summary>
/// A structure used to describe a bitmap or pixmap to the raster. Note that we now manage pixmaps of various depths through the ‘pixel_mode’ field.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Bitmap
{
/// <summary>
///
/// </summary>
public int rows;
/// <summary>
///
/// </summary>
public int width;
/// <summary>
///
/// </summary>
public int pitch;
/// <summary>
///
/// </summary>
public IntPtr /*byte*/ buffer;
/// <summary>
///
/// </summary>
public short num_grays;
/// <summary>
///
/// </summary>
public sbyte pixel_mode;
/// <summary>
///
/// </summary>
public sbyte palette_mode;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ palette;
}
/// <summary>
/// This structure is used to describe an outline to the scan-line converter.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Outline
{
/// <summary>
///
/// </summary>
public short n_contours;
/// <summary>
///
/// </summary>
public short n_points;
/// <summary>
///
/// </summary>
public IntPtr /*Vector*/ points;
/// <summary>
///
/// </summary>
public IntPtr /*sbyte*/ tags;
/// <summary>
///
/// </summary>
public IntPtr /*short*/ contours;
/// <summary>
///
/// </summary>
public int flags;
}
/// <summary>
/// A structure to hold various function pointers used during outline decomposition in order to emit segments, conic, and cubic Béziers, as well as ‘move to’ and ‘close to’ operations.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Outline_Funcs
{
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ move_to;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ line_to;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ conic_to;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ cubic_to;
/// <summary>
///
/// </summary>
public int shift;
/// <summary>
///
/// </summary>
public int delta;
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct RasterRec_
{
}
/// <summary>
/// A structure used to model a single span of gray (or black) pixels when rendering a monochrome or anti-aliased bitmap
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Span
{
/// <summary>
///
/// </summary>
public short x;
/// <summary>
///
/// </summary>
public ushort len;
/// <summary>
///
/// </summary>
public byte coverage;
}
/// <summary>
/// A structure to hold the arguments used by a raster's render functions
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Raster_Params
{
/// <summary>
///
/// </summary>
public IntPtr /*Bitmap*/ target;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ source;
/// <summary>
///
/// </summary>
public int flags;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ gray_spans;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ black_spans;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ bit_test;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ bit_set;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ user;
/// <summary>
///
/// </summary>
public FT_BBox clip_box;
}
/// <summary>
/// A structure used to describe a given raster class to the library.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Raster_Funcs
{
/// <summary>
///
/// </summary>
public FT_Glyph_Format glyph_format;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ raster_new;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ raster_reset;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ raster_set_mode;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ raster_render;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ raster_done;
}
/// <summary>
/// A simple structure used to store a 2D vector unit vector.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_UnitVector
{
/// <summary>
///
/// </summary>
public short x;
/// <summary>
///
/// </summary>
public short y;
}
/// <summary>
/// A simple structure used to store a 2x2 matrix. Coefficients are in 16.16 fixed float format. The computation performed is:
/// x' = x*xx + y*xy
/// y' = x*yx + y*yy
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Matrix
{
/// <summary>
///
/// </summary>
public int xx;
/// <summary>
///
/// </summary>
public int xy;
/// <summary>
///
/// </summary>
public int yx;
/// <summary>
///
/// </summary>
public int yy;
}
/// <summary>
/// Read-only binary data represented as a pointer and a length.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Data
{
/// <summary>
///
/// </summary>
public IntPtr /*byte*/ pointer;
/// <summary>
///
/// </summary>
public int length;
}
/// <summary>
/// Client applications often need to associate their own data to a variety of FreeType core objects. For example, a text layout API might want to associate a glyph cache to a given size object.
/// Most FreeType object contains a ‘generic’ field, of type FT_Generic, which usage is left to client applications and font servers.
/// It can be used to store a pointer to client-specific data, as well as the address of a ‘finalizer’ function, which will be called by FreeType when the object is destroyed (for example, the previous client example would put the address of the glyph cache destructor in the ‘finalizer’ field).
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Generic
{
/// <summary>
///
/// </summary>
public IntPtr /*void*/ data;
/// <summary>
///
/// </summary>
public IntPtr /* funcptr */ finalizer;
}
/// <summary>
/// A structure used to hold a single list element.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_ListNodeRec
{
/// <summary>
///
/// </summary>
public IntPtr /*ListNodeRec*/ prev;
/// <summary>
///
/// </summary>
public IntPtr /*ListNodeRec*/ next;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ data;
}
/// <summary>
/// A structure used to hold a simple double-linked list. These are used in many parts of FreeType.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_ListRec
{
/// <summary>
///
/// </summary>
public IntPtr /*ListNodeRec*/ head;
/// <summary>
///
/// </summary>
public IntPtr /*ListNodeRec*/ tail;
}
/// <summary>
/// A structure used to model the metrics of a single glyph. The values are expressed in 26.6 fractional pixel format; if the flag FT_LOAD_NO_SCALE has been used while loading the glyph, values are expressed in font units instead.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Glyph_Metrics
{
/// <summary>
///
/// </summary>
public int width;
/// <summary>
///
/// </summary>
public int height;
/// <summary>
///
/// </summary>
public int horiBearingX;
/// <summary>
///
/// </summary>
public int horiBearingY;
/// <summary>
///
/// </summary>
public int horiAdvance;
/// <summary>
///
/// </summary>
public int vertBearingX;
/// <summary>
///
/// </summary>
public int vertBearingY;
/// <summary>
///
/// </summary>
public int vertAdvance;
}
/// <summary>
/// This structure models the metrics of a bitmap strike (i.e., a set of glyphs for a given point size and resolution) in a bitmap font. It is used for the ‘available_sizes’ field of FT_Face.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Bitmap_Size
{
/// <summary>
///
/// </summary>
public short height;
/// <summary>
///
/// </summary>
public short width;
/// <summary>
///
/// </summary>
public int size;
/// <summary>
///
/// </summary>
public int x_ppem;
/// <summary>
///
/// </summary>
public int y_ppem;
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct LibraryRec_
{
}
/// <summary>
/// /
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct ModuleRec_
{
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct DriverRec_
{
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct RendererRec_
{
}
/// <summary>
/// FreeType root face class structure. A face object models a typeface in a font file.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_FaceRec
{
/// <summary>
///
/// </summary>
public int num_faces;
/// <summary>
///
/// </summary>
public int face_index;
/// <summary>
/// /
/// </summary>
public int face_flags;
/// <summary>
///
/// </summary>
public int style_flags;
/// <summary>
///
/// </summary>
public int num_glyphs;
/// <summary>
///
/// </summary>
public IntPtr /*sbyte*/ family_name;
/// <summary>
///
/// </summary>
public IntPtr /*sbyte*/ style_name;
/// <summary>
///
/// </summary>
public int num_fixed_sizes;
/// <summary>
///
/// </summary>
public IntPtr /*Bitmap_Size*/ available_sizes;
/// <summary>
///
/// </summary>
public int num_charmaps;
/// <summary>
///
/// </summary>
public IntPtr /*IntPtr CharMapRec*/ charmaps;
/// <summary>
///
/// </summary>
public FT_Generic generic;
/// <summary>
///
/// </summary>
public FT_BBox bbox;
/// <summary>
///
/// </summary>
public ushort units_per_EM;
/// <summary>
///
/// </summary>
public short ascender;
/// <summary>
///
/// </summary>
public short descender;
/// <summary>
///
/// </summary>
public short height;
/// <summary>
///
/// </summary>
public short max_advance_width;
/// <summary>
///
/// </summary>
public short max_advance_height;
/// <summary>
///
/// </summary>
public short underline_position;
/// <summary>
///
/// </summary>
public short underline_thickness;
/// <summary>
///
/// </summary>
public IntPtr /*GlyphSlotRec*/ glyph;
/// <summary>
///
/// </summary>
public IntPtr /*SizeRec*/ size;
/// <summary>
///
/// </summary>
public IntPtr /*CharMapRec*/ charmap;
/// <summary>
///
/// </summary>
public IntPtr /*DriverRec_*/ driver;
/// <summary>
///
/// </summary>
public IntPtr /*MemoryRec_*/ memory;
/// <summary>
///
/// </summary>
public IntPtr /*StreamRec*/ stream;
/// <summary>
///
/// </summary>
public FT_ListRec sizes_list;
/// <summary>
///
/// </summary>
public FT_Generic autohint;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ extensions;
/// <summary>
///
/// </summary>
public IntPtr /*Face_InternalRec_*/ _internal;
}
/// <summary>
/// FreeType root size class structure. A size object models a face object at a given size.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_SizeRec
{
/// <summary>
///
/// </summary>
public IntPtr /*FaceRec*/ face;
/// <summary>
///
/// </summary>
public FT_Generic generic;
/// <summary>
///
/// </summary>
public FT_Size_Metrics metrics;
/// <summary>
///
/// </summary>
public IntPtr /*Size_InternalRec_*/ _internal;
}
/// <summary>
/// FreeType root glyph slot class structure. A glyph slot is a container where individual glyphs can be loaded, be they in outline or bitmap format.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_GlyphSlotRec
{
/// <summary>
///
/// </summary>
public IntPtr /*LibraryRec_*/ library;
/// <summary>
///
/// </summary>
public IntPtr /*FaceRec*/ face;
/// <summary>
///
/// </summary>
public IntPtr /*GlyphSlotRec*/ next;
/// <summary>
///
/// </summary>
public uint reserved;
/// <summary>
///
/// </summary>
public FT_Generic generic;
/// <summary>
///
/// </summary>
public FT_Glyph_Metrics metrics;
/// <summary>
///
/// </summary>
public int linearHoriAdvance;
/// <summary>
///
/// </summary>
public int linearVertAdvance;
/// <summary>
///
/// </summary>
public FT_Vector advance;
/// <summary>
///
/// </summary>
public FT_Glyph_Format format;
/// <summary>
///
/// </summary>
public FT_Bitmap bitmap;
/// <summary>
///
/// </summary>
public int bitmap_left;
/// <summary>
///
/// </summary>
public int bitmap_top;
/// <summary>
///
/// </summary>
public FT_Outline outline;
/// <summary>
///
/// </summary>
public uint num_subglyphs;
/// <summary>
///
/// </summary>
public IntPtr /*SubGlyphRec_*/ subglyphs;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ control_data;
/// <summary>
///
/// </summary>
public int control_len;
/// <summary>
///
/// </summary>
public int lsb_delta;
/// <summary>
///
/// </summary>
public int rsb_delta;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ other;
/// <summary>
///
/// </summary>
public IntPtr /*Slot_InternalRec_*/ _internal;
}
/// <summary>
/// The base charmap structure.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_CharMapRec
{
/// <summary>
///
/// </summary>
public IntPtr /*FaceRec*/ face;
/// <summary>
///
/// </summary>
public FT_Encoding encoding;
/// <summary>
///
/// </summary>
public ushort platform_id;
/// <summary>
///
/// </summary>
public ushort encoding_id;
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct Face_InternalRec_
{
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct Size_InternalRec_
{
}
/// <summary>
/// The size metrics structure gives the metrics of a size object.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Size_Metrics
{
/// <summary>
///
/// </summary>
public ushort x_ppem;
/// <summary>
///
/// </summary>
public ushort y_ppem;
/// <summary>
///
/// </summary>
public int x_scale;
/// <summary>
///
/// </summary>
public int y_scale;
/// <summary>
///
/// </summary>
public int ascender;
/// <summary>
///
/// </summary>
public int descender;
/// <summary>
///
/// </summary>
public int height;
/// <summary>
///
/// </summary>
public int max_advance;
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct SubGlyphRec_
{
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct Slot_InternalRec_
{
}
/// <summary>
/// A simple structure used to pass more or less generic parameters to FT_Open_Face.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Parameter
{
/// <summary>
///
/// </summary>
public uint tag;
/// <summary>
///
/// </summary>
public IntPtr /*void*/ data;
}
/// <summary>
/// A structure used to indicate how to open a new font file or stream. A pointer to such a structure can be used as a parameter for the functions FT_Open_Face and FT_Attach_Stream.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct FT_Open_Args
{
/// <summary>
///
/// </summary>
public uint flags;
/// <summary>
///