mirror of https://github.com/dahall/Vanara.git
251 lines
8.8 KiB
C#
251 lines
8.8 KiB
C#
using System.Runtime.InteropServices;
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namespace Vanara.PInvoke
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{
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/// <summary>
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/// The <c>TEXTMETRIC</c> structure contains basic information about a physical font. All sizes are specified in logical units; that
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/// is, they depend on the current mapping mode of the display context.
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/// </summary>
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// https://docs.microsoft.com/en-us/windows/desktop/api/wingdi/ns-wingdi-tagtextmetrica typedef struct tagTEXTMETRICA { LONG
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// tmHeight; LONG tmAscent; LONG tmDescent; LONG tmInternalLeading; LONG tmExternalLeading; LONG tmAveCharWidth; LONG tmMaxCharWidth;
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// LONG tmWeight; LONG tmOverhang; LONG tmDigitizedAspectX; LONG tmDigitizedAspectY; BYTE tmFirstChar; BYTE tmLastChar; BYTE
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// tmDefaultChar; BYTE tmBreakChar; BYTE tmItalic; BYTE tmUnderlined; BYTE tmStruckOut; BYTE tmPitchAndFamily; BYTE tmCharSet; }
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// TEXTMETRICA, *PTEXTMETRICA, *NPTEXTMETRICA, *LPTEXTMETRICA;
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[PInvokeData("wingdi.h", MSDNShortId = "0a46da58-5d0f-4db4-bba6-9e1b6c1f892c")]
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
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public struct TEXTMETRIC
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{
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/// <summary>
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/// <para>The height (ascent + descent) of characters.</para>
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/// </summary>
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public int tmHeight;
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/// <summary>
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/// <para>The ascent (units above the base line) of characters.</para>
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/// </summary>
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public int tmAscent;
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/// <summary>
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/// <para>The descent (units below the base line) of characters.</para>
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/// </summary>
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public int tmDescent;
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/// <summary>
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/// <para>
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/// The amount of leading (space) inside the bounds set by the <c>tmHeight</c> member. Accent marks and other diacritical
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/// characters may occur in this area. The designer may set this member to zero.
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/// </para>
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/// </summary>
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public int tmInternalLeading;
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/// <summary>
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/// <para>
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/// The amount of extra leading (space) that the application adds between rows. Since this area is outside the font, it contains
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/// no marks and is not altered by text output calls in either OPAQUE or TRANSPARENT mode. The designer may set this member to zero.
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/// </para>
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/// </summary>
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public int tmExternalLeading;
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/// <summary>
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/// <para>
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/// The average width of characters in the font (generally defined as the width of the letter x ). This value does not include
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/// the overhang required for bold or italic characters.
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/// </para>
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/// </summary>
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public int tmAveCharWidth;
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/// <summary>
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/// <para>The width of the widest character in the font.</para>
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/// </summary>
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public int tmMaxCharWidth;
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/// <summary>
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/// <para>The weight of the font.</para>
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/// </summary>
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public int tmWeight;
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/// <summary>
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/// <para>
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/// The extra width per string that may be added to some synthesized fonts. When synthesizing some attributes, such as bold or
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/// italic, graphics device interface (GDI) or a device may have to add width to a string on both a per-character and per-string
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/// basis. For example, GDI makes a string bold by expanding the spacing of each character and overstriking by an offset value;
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/// it italicizes a font by shearing the string. In either case, there is an overhang past the basic string. For bold strings,
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/// the overhang is the distance by which the overstrike is offset. For italic strings, the overhang is the amount the top of the
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/// font is sheared past the bottom of the font.
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/// </para>
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/// <para>
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/// The <c>tmOverhang</c> member enables the application to determine how much of the character width returned by a
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/// GetTextExtentPoint32 function call on a single character is the actual character width and how much is the per-string extra
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/// width. The actual width is the extent minus the overhang.
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/// </para>
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/// </summary>
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public int tmOverhang;
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/// <summary>
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/// <para>The horizontal aspect of the device for which the font was designed.</para>
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/// </summary>
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public int tmDigitizedAspectX;
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/// <summary>
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/// <para>
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/// The vertical aspect of the device for which the font was designed. The ratio of the <c>tmDigitizedAspectX</c> and
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/// <c>tmDigitizedAspectY</c> members is the aspect ratio of the device for which the font was designed.
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/// </para>
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/// </summary>
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public int tmDigitizedAspectY;
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/// <summary>
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/// <para>The value of the first character defined in the font.</para>
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/// </summary>
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public char tmFirstChar;
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/// <summary>
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/// <para>The value of the last character defined in the font.</para>
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/// </summary>
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public char tmLastChar;
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/// <summary>
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/// <para>The value of the character to be substituted for characters not in the font.</para>
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/// </summary>
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public char tmDefaultChar;
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/// <summary>
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/// <para>The value of the character that will be used to define word breaks for text justification.</para>
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/// </summary>
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public char tmBreakChar;
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/// <summary>
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/// <para>Specifies an italic font if it is nonzero.</para>
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/// </summary>
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public byte tmItalic;
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/// <summary>
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/// <para>Specifies an underlined font if it is nonzero.</para>
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/// </summary>
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public byte tmUnderlined;
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/// <summary>
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/// <para>A strikeout font if it is nonzero.</para>
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/// </summary>
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public byte tmStruckOut;
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/// <summary>
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/// <para>Specifies information about the pitch, the technology, and the family of a physical font.</para>
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/// <para>
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/// The four low-order bits of this member specify information about the pitch and the technology of the font. A constant is
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/// defined for each of the four bits.
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/// </para>
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/// <list type="table">
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/// <listheader>
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/// <term>Constant</term>
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/// <term>Meaning</term>
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/// </listheader>
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/// <item>
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/// <term>TMPF_FIXED_PITCH</term>
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/// <term>
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/// If this bit is set the font is a variable pitch font. If this bit is clear the font is a fixed pitch font. Note very
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/// carefully that those meanings are the opposite of what the constant name implies.
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/// </term>
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/// </item>
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/// <item>
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/// <term>TMPF_VECTOR</term>
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/// <term>If this bit is set the font is a vector font.</term>
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/// </item>
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/// <item>
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/// <term>TMPF_TRUETYPE</term>
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/// <term>If this bit is set the font is a TrueType font.</term>
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/// </item>
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/// <item>
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/// <term>TMPF_DEVICE</term>
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/// <term>If this bit is set the font is a device font.</term>
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/// </item>
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/// </list>
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/// <para>
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/// An application should carefully test for qualities encoded in these low-order bits, making no arbitrary assumptions. For
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/// example, besides having their own bits set, TrueType and PostScript fonts set the TMPF_VECTOR bit. A monospace bitmap font
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/// has all of these low-order bits clear; a proportional bitmap font sets the TMPF_FIXED_PITCH bit. A Postscript printer device
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/// font sets the TMPF_DEVICE, TMPF_VECTOR, and TMPF_FIXED_PITCH bits.
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/// </para>
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/// <para>
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/// The four high-order bits of <c>tmPitchAndFamily</c> designate the font's font family. An application can use the value 0xF0
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/// and the bitwise AND operator to mask out the four low-order bits of <c>tmPitchAndFamily</c>, thus obtaining a value that can
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/// be directly compared with font family names to find an identical match. For information about font families, see the
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/// description of the LOGFONT structure.
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/// </para>
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/// </summary>
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public byte tmPitchAndFamily;
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/// <summary>
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/// <para>The character set of the font. The character set can be one of the following values.</para>
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/// <list type="bullet">
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/// <item>
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/// <term>ANSI_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>BALTIC_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>CHINESEBIG5_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>DEFAULT_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>EASTEUROPE_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>GB2312_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>GREEK_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>HANGUL_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>MAC_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>OEM_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>RUSSIAN_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>SHIFTJIS_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>SYMBOL_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>TURKISH_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>VIETNAMESE_CHARSET</term>
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/// </item>
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/// </list>
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/// <para>Korean language edition of Windows:</para>
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/// <list type="bullet">
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/// <item>
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/// <term>JOHAB_CHARSET</term>
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/// </item>
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/// </list>
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/// <para>Middle East language edition of Windows:</para>
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/// <list type="bullet">
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/// <item>
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/// <term>ARABIC_CHARSET</term>
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/// </item>
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/// <item>
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/// <term>HEBREW_CHARSET</term>
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/// </item>
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/// </list>
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/// <para>Thai language edition of Windows:</para>
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/// <list type="bullet">
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/// <item>
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/// <term>THAI_CHARSET</term>
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/// </item>
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/// </list>
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/// </summary>
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public CharacterSet tmCharSet;
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}
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} |