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SDL_ttf.h
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/*
SDL_ttf: A companion library to SDL for working with TrueType (tm) fonts
Copyright (C) 2001-2022 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/**
* \file SDL_ttf.h
*
* Header file for SDL_ttf library
*
* This library is a wrapper around the excellent FreeType 2.0 library,
* available at: https://www.freetype.org/
*
* Note: In many places, SDL_ttf will say "glyph" when it means "code point."
* Unicode is hard, we learn as we go, and we apologize for adding to the
* confusion.
*
*/
#ifndef SDL_TTF_H_
#define SDL_TTF_H_
#include "SDL.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
/**
* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL
*/
#define SDL_TTF_MAJOR_VERSION 2
#define SDL_TTF_MINOR_VERSION 20
#define SDL_TTF_PATCHLEVEL 1
/**
* This macro can be used to fill a version structure with the compile-time
* version of the SDL_ttf library.
*/
#define SDL_TTF_VERSION(X) \
{ \
(X)->major = SDL_TTF_MAJOR_VERSION; \
(X)->minor = SDL_TTF_MINOR_VERSION; \
(X)->patch = SDL_TTF_PATCHLEVEL; \
}
/**
* Backwards compatibility
*/
#define TTF_MAJOR_VERSION SDL_TTF_MAJOR_VERSION
#define TTF_MINOR_VERSION SDL_TTF_MINOR_VERSION
#define TTF_PATCHLEVEL SDL_TTF_PATCHLEVEL
#define TTF_VERSION(X) SDL_TTF_VERSION(X)
#if SDL_TTF_MAJOR_VERSION < 3 && SDL_MAJOR_VERSION < 3
/**
* This is the version number macro for the current SDL_ttf version.
*
* In versions higher than 2.9.0, the minor version overflows into
* the thousands digit: for example, 2.23.0 is encoded as 4300.
* This macro will not be available in SDL 3.x or SDL_ttf 3.x.
*
* \deprecated, use SDL_TTF_VERSION_ATLEAST or SDL_TTF_VERSION instead.
*/
#define SDL_TTF_COMPILEDVERSION \
SDL_VERSIONNUM(SDL_TTF_MAJOR_VERSION, SDL_TTF_MINOR_VERSION, SDL_TTF_PATCHLEVEL)
#endif /* SDL_TTF_MAJOR_VERSION < 3 && SDL_MAJOR_VERSION < 3 */
/**
* This macro will evaluate to true if compiled with SDL_ttf at least X.Y.Z.
*/
#define SDL_TTF_VERSION_ATLEAST(X, Y, Z) \
((SDL_TTF_MAJOR_VERSION >= X) && \
(SDL_TTF_MAJOR_VERSION > X || SDL_TTF_MINOR_VERSION >= Y) && \
(SDL_TTF_MAJOR_VERSION > X || SDL_TTF_MINOR_VERSION > Y || SDL_TTF_PATCHLEVEL >= Z))
/* Make sure this is defined (only available in newer SDL versions) */
#ifndef SDL_DEPRECATED
#define SDL_DEPRECATED
#endif
/**
* Query the version of SDL_ttf that the program is linked against.
*
* This function gets the version of the dynamically linked SDL_ttf library.
* This is separate from the SDL_TTF_VERSION() macro, which tells you what
* version of the SDL_ttf headers you compiled against.
*
* This returns static internal data; do not free or modify it!
*
* \returns a pointer to the version information.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC const SDL_version * SDLCALL TTF_Linked_Version(void);
/**
* Query the version of the FreeType library in use.
*
* TTF_Init() should be called before calling this function.
*
* \param major to be filled in with the major version number. Can be NULL.
* \param minor to be filled in with the minor version number. Can be NULL.
* \param patch to be filled in with the param version number. Can be NULL.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_Init
*/
extern DECLSPEC void SDLCALL TTF_GetFreeTypeVersion(int *major, int *minor, int *patch);
/**
* Query the version of the HarfBuzz library in use.
*
* If HarfBuzz is not available, the version reported is 0.0.0.
*
* \param major to be filled in with the major version number. Can be NULL.
* \param minor to be filled in with the minor version number. Can be NULL.
* \param patch to be filled in with the param version number. Can be NULL.
*
* \since This function is available since SDL_ttf 2.0.18.
*/
extern DECLSPEC void SDLCALL TTF_GetHarfBuzzVersion(int *major, int *minor, int *patch);
/**
* ZERO WIDTH NO-BREAKSPACE (Unicode byte order mark)
*/
#define UNICODE_BOM_NATIVE 0xFEFF
#define UNICODE_BOM_SWAPPED 0xFFFE
/**
* Tell SDL_ttf whether UNICODE text is generally byteswapped.
*
* A UNICODE BOM character in a string will override this setting for the
* remainder of that string.
*
* \param swapped boolean to indicate whether text is byteswapped
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC void SDLCALL TTF_ByteSwappedUNICODE(SDL_bool swapped);
/**
* The internal structure containing font information. Opaque data!
*/
typedef struct _TTF_Font TTF_Font;
/**
* Initialize SDL_ttf.
*
* You must successfully call this function before it is safe to call any
* other function in this library, with one exception: a human-readable error
* message can be retrieved from TTF_GetError() if this function fails.
*
* SDL must be initialized before calls to functions in this library, because
* this library uses utility functions from the SDL library.
*
* It is safe to call this more than once; the library keeps a counter of init
* calls, and decrements it on each call to TTF_Quit, so you must pair your
* init and quit calls.
*
* \returns 0 on success, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_Quit
*/
extern DECLSPEC int SDLCALL TTF_Init(void);
/**
* Create a font from a file, using a specified point size.
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param file path to font file.
* \param ptsize point size to use for the newly-opened font.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFont(const char *file, int ptsize);
/**
* Create a font from a file, using a specified face index.
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* Some fonts have multiple "faces" included. The index specifies which face
* to use from the font file. Font files with only one face should specify
* zero for the index.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param file path to font file.
* \param ptsize point size to use for the newly-opened font.
* \param index index of the face in the font file.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontIndex(const char *file, int ptsize, long index);
/**
* Create a font from an SDL_RWops, using a specified point size.
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* If `freesrc` is non-zero, the RWops will be closed before returning,
* whether this function succeeds or not. SDL_ttf reads everything it needs
* from the RWops during this call in any case.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param src an SDL_RWops to provide a font file's data.
* \param freesrc non-zero to close the RWops before returning, zero to leave
* it open.
* \param ptsize point size to use for the newly-opened font.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontRW(SDL_RWops *src, int freesrc, int ptsize);
/**
* Create a font from an SDL_RWops, using a specified face index.
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* If `freesrc` is non-zero, the RWops will be closed before returning,
* whether this function succeeds or not. SDL_ttf reads everything it needs
* from the RWops during this call in any case.
*
* Some fonts have multiple "faces" included. The index specifies which face
* to use from the font file. Font files with only one face should specify
* zero for the index.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param src an SDL_RWops to provide a font file's data.
* \param freesrc non-zero to close the RWops before returning, zero to leave
* it open.
* \param ptsize point size to use for the newly-opened font.
* \param index index of the face in the font file.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontIndexRW(SDL_RWops *src, int freesrc, int ptsize, long index);
/**
* Create a font from a file, using target resolutions (in DPI).
*
* DPI scaling only applies to scalable fonts (e.g. TrueType).
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param file path to font file.
* \param ptsize point size to use for the newly-opened font.
* \param hdpi the target horizontal DPI.
* \param vdpi the target vertical DPI.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontDPI(const char *file, int ptsize, unsigned int hdpi, unsigned int vdpi);
/**
* Create a font from a file, using target resolutions (in DPI).
*
* DPI scaling only applies to scalable fonts (e.g. TrueType).
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* Some fonts have multiple "faces" included. The index specifies which face
* to use from the font file. Font files with only one face should specify
* zero for the index.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param file path to font file.
* \param ptsize point size to use for the newly-opened font.
* \param index index of the face in the font file.
* \param hdpi the target horizontal DPI.
* \param vdpi the target vertical DPI.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontIndexDPI(const char *file, int ptsize, long index, unsigned int hdpi, unsigned int vdpi);
/**
* Opens a font from an SDL_RWops with target resolutions (in DPI).
*
* DPI scaling only applies to scalable fonts (e.g. TrueType).
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* If `freesrc` is non-zero, the RWops will be closed before returning,
* whether this function succeeds or not. SDL_ttf reads everything it needs
* from the RWops during this call in any case.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param src an SDL_RWops to provide a font file's data.
* \param freesrc non-zero to close the RWops before returning, zero to leave
* it open.
* \param ptsize point size to use for the newly-opened font.
* \param hdpi the target horizontal DPI.
* \param vdpi the target vertical DPI.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontDPIRW(SDL_RWops *src, int freesrc, int ptsize, unsigned int hdpi, unsigned int vdpi);
/**
* Opens a font from an SDL_RWops with target resolutions (in DPI).
*
* DPI scaling only applies to scalable fonts (e.g. TrueType).
*
* Some .fon fonts will have several sizes embedded in the file, so the point
* size becomes the index of choosing which size. If the value is too high,
* the last indexed size will be the default.
*
* If `freesrc` is non-zero, the RWops will be closed before returning,
* whether this function succeeds or not. SDL_ttf reads everything it needs
* from the RWops during this call in any case.
*
* Some fonts have multiple "faces" included. The index specifies which face
* to use from the font file. Font files with only one face should specify
* zero for the index.
*
* When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.
*
* \param src an SDL_RWops to provide a font file's data.
* \param freesrc non-zero to close the RWops before returning, zero to leave
* it open.
* \param ptsize point size to use for the newly-opened font.
* \param index index of the face in the font file.
* \param hdpi the target horizontal DPI.
* \param vdpi the target vertical DPI.
* \returns a valid TTF_Font, or NULL on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_CloseFont
*/
extern DECLSPEC TTF_Font * SDLCALL TTF_OpenFontIndexDPIRW(SDL_RWops *src, int freesrc, int ptsize, long index, unsigned int hdpi, unsigned int vdpi);
/**
* Set a font's size dynamically.
*
* This clears already-generated glyphs, if any, from the cache.
*
* \param font the font to resize.
* \param ptsize the new point size.
* \returns 0 if successful, -1 on error
*
* \since This function is available since SDL_ttf 2.0.18.
*/
extern DECLSPEC int SDLCALL TTF_SetFontSize(TTF_Font *font, int ptsize);
/**
* Set font size dynamically with target resolutions (in DPI).
*
* This clears already-generated glyphs, if any, from the cache.
*
* \param font the font to resize.
* \param ptsize the new point size.
* \param hdpi the target horizontal DPI.
* \param vdpi the target vertical DPI.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*/
extern DECLSPEC int SDLCALL TTF_SetFontSizeDPI(TTF_Font *font, int ptsize, unsigned int hdpi, unsigned int vdpi);
/**
* Font style flags
*/
#define TTF_STYLE_NORMAL 0x00
#define TTF_STYLE_BOLD 0x01
#define TTF_STYLE_ITALIC 0x02
#define TTF_STYLE_UNDERLINE 0x04
#define TTF_STYLE_STRIKETHROUGH 0x08
/**
* Query a font's current style.
*
* The font styles are a set of bit flags, OR'd together:
*
* - `TTF_STYLE_NORMAL` (is zero)
* - `TTF_STYLE_BOLD`
* - `TTF_STYLE_ITALIC`
* - `TTF_STYLE_UNDERLINE`
* - `TTF_STYLE_STRIKETHROUGH`
*
* \param font the font to query.
* \returns the current font style, as a set of bit flags.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_SetFontStyle
*/
extern DECLSPEC int SDLCALL TTF_GetFontStyle(const TTF_Font *font);
/**
* Set a font's current style.
*
* Setting the style clears already-generated glyphs, if any, from the cache.
*
* The font styles are a set of bit flags, OR'd together:
*
* - `TTF_STYLE_NORMAL` (is zero)
* - `TTF_STYLE_BOLD`
* - `TTF_STYLE_ITALIC`
* - `TTF_STYLE_UNDERLINE`
* - `TTF_STYLE_STRIKETHROUGH`
*
* \param font the font to set a new style on.
* \param style the new style values to set, OR'd together.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_GetFontStyle
*/
extern DECLSPEC void SDLCALL TTF_SetFontStyle(TTF_Font *font, int style);
/**
* Query a font's current outline.
*
* \param font the font to query.
* \returns the font's current outline value.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_SetFontOutline
*/
extern DECLSPEC int SDLCALL TTF_GetFontOutline(const TTF_Font *font);
/**
* Set a font's current outline.
*
* \param font the font to set a new outline on.
* \param outline positive outline value, 0 to default.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_GetFontOutline
*/
extern DECLSPEC void SDLCALL TTF_SetFontOutline(TTF_Font *font, int outline);
/**
* Hinting flags
*/
#define TTF_HINTING_NORMAL 0
#define TTF_HINTING_LIGHT 1
#define TTF_HINTING_MONO 2
#define TTF_HINTING_NONE 3
#define TTF_HINTING_LIGHT_SUBPIXEL 4
/**
* Query a font's current FreeType hinter setting.
*
* The hinter setting is a single value:
*
* - `TTF_HINTING_NORMAL`
* - `TTF_HINTING_LIGHT`
* - `TTF_HINTING_MONO`
* - `TTF_HINTING_NONE`
* - `TTF_HINTING_LIGHT_SUBPIXEL` (available in SDL_ttf 2.0.18 and later)
*
* \param font the font to query.
* \returns the font's current hinter value.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_SetFontHinting
*/
extern DECLSPEC int SDLCALL TTF_GetFontHinting(const TTF_Font *font);
/**
* Set a font's current hinter setting.
*
* Setting it clears already-generated glyphs, if any, from the cache.
*
* The hinter setting is a single value:
*
* - `TTF_HINTING_NORMAL`
* - `TTF_HINTING_LIGHT`
* - `TTF_HINTING_MONO`
* - `TTF_HINTING_NONE`
* - `TTF_HINTING_LIGHT_SUBPIXEL` (available in SDL_ttf 2.0.18 and later)
*
* \param font the font to set a new hinter setting on.
* \param hinting the new hinter setting.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_GetFontHinting
*/
extern DECLSPEC void SDLCALL TTF_SetFontHinting(TTF_Font *font, int hinting);
/**
* Special layout option for rendering wrapped text
*/
#define TTF_WRAPPED_ALIGN_LEFT 0
#define TTF_WRAPPED_ALIGN_CENTER 1
#define TTF_WRAPPED_ALIGN_RIGHT 2
/**
* Query a font's current wrap alignment option.
*
* The wrap alignment option can be one of the following:
*
* - `TTF_WRAPPED_ALIGN_LEFT`
* - `TTF_WRAPPED_ALIGN_CENTER`
* - `TTF_WRAPPED_ALIGN_RIGHT`
*
* \param font the font to query.
* \returns the font's current wrap alignment option.
*
* \since This function is available since SDL_ttf 2.20.0.
*
* \sa TTF_SetFontWrappedAlign
*/
extern DECLSPEC int SDLCALL TTF_GetFontWrappedAlign(const TTF_Font *font);
/**
* Set a font's current wrap alignment option.
*
* The wrap alignment option can be one of the following:
*
* - `TTF_WRAPPED_ALIGN_LEFT`
* - `TTF_WRAPPED_ALIGN_CENTER`
* - `TTF_WRAPPED_ALIGN_RIGHT`
*
* \param font the font to set a new wrap alignment option on.
* \param align the new wrap alignment option.
*
* \since This function is available since SDL_ttf 2.20.0.
*
* \sa TTF_GetFontWrappedAlign
*/
extern DECLSPEC void SDLCALL TTF_SetFontWrappedAlign(TTF_Font *font, int align);
/**
* Query the total height of a font.
*
* This is usually equal to point size.
*
* \param font the font to query.
* \returns the font's height.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC int SDLCALL TTF_FontHeight(const TTF_Font *font);
/**
* Query the offset from the baseline to the top of a font.
*
* This is a positive value, relative to the baseline.
*
* \param font the font to query.
* \returns the font's ascent.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC int SDLCALL TTF_FontAscent(const TTF_Font *font);
/**
* Query the offset from the baseline to the bottom of a font.
*
* This is a negative value, relative to the baseline.
*
* \param font the font to query.
* \returns the font's descent.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC int SDLCALL TTF_FontDescent(const TTF_Font *font);
/**
* Query the recommended spacing between lines of text for a font.
*
* \param font the font to query.
* \returns the font's recommended spacing.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC int SDLCALL TTF_FontLineSkip(const TTF_Font *font);
/**
* Query whether or not kerning is allowed for a font.
*
* \param font the font to query.
* \returns non-zero if kerning is enabled, zero otherwise.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC int SDLCALL TTF_GetFontKerning(const TTF_Font *font);
/**
* Set if kerning is allowed for a font.
*
* Newly-opened fonts default to allowing kerning. This is generally a good
* policy unless you have a strong reason to disable it, as it tends to
* produce better rendering (with kerning disabled, some fonts might render
* the word `kerning` as something that looks like `keming` for example).
*
* \param font the font to set kerning on.
* \param allowed non-zero to allow kerning, zero to disallow.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC void SDLCALL TTF_SetFontKerning(TTF_Font *font, int allowed);
/**
* Query the number of faces of a font.
*
* \param font the font to query.
* \returns the number of FreeType font faces.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC long SDLCALL TTF_FontFaces(const TTF_Font *font);
/**
* Query whether a font is fixed-width.
*
* A "fixed-width" font means all glyphs are the same width across; a
* lowercase 'i' will be the same size across as a capital 'W', for example.
* This is common for terminals and text editors, and other apps that treat
* text as a grid. Most other things (WYSIWYG word processors, web pages, etc)
* are more likely to not be fixed-width in most cases.
*
* \param font the font to query.
* \returns non-zero if fixed-width, zero if not.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC int SDLCALL TTF_FontFaceIsFixedWidth(const TTF_Font *font);
/**
* Query a font's family name.
*
* This string is dictated by the contents of the font file.
*
* Note that the returned string is to internal storage, and should not be
* modifed or free'd by the caller. The string becomes invalid, with the rest
* of the font, when `font` is handed to TTF_CloseFont().
*
* \param font the font to query.
* \returns the font's family name.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC const char * SDLCALL TTF_FontFaceFamilyName(const TTF_Font *font);
/**
* Query a font's style name.
*
* This string is dictated by the contents of the font file.
*
* Note that the returned string is to internal storage, and should not be
* modifed or free'd by the caller. The string becomes invalid, with the rest
* of the font, when `font` is handed to TTF_CloseFont().
*
* \param font the font to query.
* \returns the font's style name.
*
* \since This function is available since SDL_ttf 2.0.12.
*/
extern DECLSPEC const char * SDLCALL TTF_FontFaceStyleName(const TTF_Font *font);
/**
* Check whether a glyph is provided by the font for a 16-bit codepoint.
*
* Note that this version of the function takes a 16-bit character code, which
* covers the Basic Multilingual Plane, but is insufficient to cover the
* entire set of possible Unicode values, including emoji glyphs. You should
* use TTF_GlyphIsProvided32() instead, which offers the same functionality
* but takes a 32-bit codepoint instead.
*
* The only reason to use this function is that it was available since the
* beginning of time, more or less.
*
* \param font the font to query.
* \param ch the character code to check.
* \returns non-zero if font provides a glyph for this character, zero if not.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_GlyphIsProvided32
*/
extern DECLSPEC int SDLCALL TTF_GlyphIsProvided(TTF_Font *font, Uint16 ch);
/**
* Check whether a glyph is provided by the font for a 32-bit codepoint.
*
* This is the same as TTF_GlyphIsProvided(), but takes a 32-bit character
* instead of 16-bit, and thus can query a larger range. If you are sure
* you'll have an SDL_ttf that's version 2.0.18 or newer, there's no reason
* not to use this function exclusively.
*
* \param font the font to query.
* \param ch the character code to check.
* \returns non-zero if font provides a glyph for this character, zero if not.
*
* \since This function is available since SDL_ttf 2.0.18.
*/
extern DECLSPEC int SDLCALL TTF_GlyphIsProvided32(TTF_Font *font, Uint32 ch);
/**
* Query the metrics (dimensions) of a font's 16-bit glyph.
*
* To understand what these metrics mean, here is a useful link:
*
* https://freetype.sourceforge.net/freetype2/docs/tutorial/step2.html
*
* Note that this version of the function takes a 16-bit character code, which
* covers the Basic Multilingual Plane, but is insufficient to cover the
* entire set of possible Unicode values, including emoji glyphs. You should
* use TTF_GlyphMetrics32() instead, which offers the same functionality but
* takes a 32-bit codepoint instead.
*
* The only reason to use this function is that it was available since the
* beginning of time, more or less.
*
* \param font the font to query.
* \param ch the character code to check.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_GlyphMetrics32
*/
extern DECLSPEC int SDLCALL TTF_GlyphMetrics(TTF_Font *font, Uint16 ch,
int *minx, int *maxx,
int *miny, int *maxy, int *advance);
/**
* Query the metrics (dimensions) of a font's 32-bit glyph.
*
* To understand what these metrics mean, here is a useful link:
*
* https://freetype.sourceforge.net/freetype2/docs/tutorial/step2.html
*
* This is the same as TTF_GlyphMetrics(), but takes a 32-bit character
* instead of 16-bit, and thus can query a larger range. If you are sure
* you'll have an SDL_ttf that's version 2.0.18 or newer, there's no reason
* not to use this function exclusively.
*
* \param font the font to query.
* \param ch the character code to check.
*
* \since This function is available since SDL_ttf 2.0.18.
*/
extern DECLSPEC int SDLCALL TTF_GlyphMetrics32(TTF_Font *font, Uint32 ch,
int *minx, int *maxx,
int *miny, int *maxy, int *advance);
/**
* Calculate the dimensions of a rendered string of Latin1 text.
*
* This will report the width and height, in pixels, of the space that the
* specified string will take to fully render.
*
* This does not need to render the string to do this calculation.
*
* You almost certainly want TTF_SizeUTF8() unless you're sure you have a
* 1-byte Latin1 encoding. US ASCII characters will work with either function,
* but most other Unicode characters packed into a `const char *` will need
* UTF-8.
*
* \param font the font to query.
* \param text text to calculate, in Latin1 encoding.
* \param w will be filled with width, in pixels, on return.
* \param h will be filled with height, in pixels, on return.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_SizeUTF8
* \sa TTF_SizeUNICODE
*/
extern DECLSPEC int SDLCALL TTF_SizeText(TTF_Font *font, const char *text, int *w, int *h);
/**
* Calculate the dimensions of a rendered string of UTF-8 text.
*
* This will report the width and height, in pixels, of the space that the
* specified string will take to fully render.
*
* This does not need to render the string to do this calculation.
*
* \param font the font to query.
* \param text text to calculate, in Latin1 encoding.
* \param w will be filled with width, in pixels, on return.
* \param h will be filled with height, in pixels, on return.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_SizeUNICODE
*/
extern DECLSPEC int SDLCALL TTF_SizeUTF8(TTF_Font *font, const char *text, int *w, int *h);
/**
* Calculate the dimensions of a rendered string of UCS-2 text.
*
* This will report the width and height, in pixels, of the space that the
* specified string will take to fully render.
*
* This does not need to render the string to do this calculation.
*
* Please note that this function is named "Unicode" but currently expects
* UCS-2 encoding (16 bits per codepoint). This does not give you access to
* large Unicode values, such as emoji glyphs. These codepoints are accessible
* through the UTF-8 version of this function.
*
* \param font the font to query.
* \param text text to calculate, in UCS-2 encoding.
* \param w will be filled with width, in pixels, on return.
* \param h will be filled with height, in pixels, on return.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_SizeUTF8
*/
extern DECLSPEC int SDLCALL TTF_SizeUNICODE(TTF_Font *font, const Uint16 *text, int *w, int *h);
/**
* Calculate how much of a Latin1 string will fit in a given width.
*
* This reports the number of characters that can be rendered before reaching
* `measure_width`.
*
* This does not need to render the string to do this calculation.
*
* You almost certainly want TTF_MeasureUTF8() unless you're sure you have a
* 1-byte Latin1 encoding. US ASCII characters will work with either function,
* but most other Unicode characters packed into a `const char *` will need
* UTF-8.
*
* \param font the font to query.
* \param text text to calculate, in Latin1 encoding.
* \param measure_width maximum width, in pixels, available for the string.
* \param count on return, filled with number of characters that can be
* rendered.
* \param extent on return, filled with latest calculated width.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_MeasureText
* \sa TTF_MeasureUTF8
* \sa TTF_MeasureUNICODE
*/
extern DECLSPEC int SDLCALL TTF_MeasureText(TTF_Font *font, const char *text, int measure_width, int *extent, int *count);
/**
* Calculate how much of a UTF-8 string will fit in a given width.
*
* This reports the number of characters that can be rendered before reaching
* `measure_width`.
*
* This does not need to render the string to do this calculation.
*
* \param font the font to query.
* \param text text to calculate, in UTF-8 encoding.
* \param measure_width maximum width, in pixels, available for the string.
* \param count on return, filled with number of characters that can be
* rendered.
* \param extent on return, filled with latest calculated width.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_MeasureText
* \sa TTF_MeasureUTF8
* \sa TTF_MeasureUNICODE
*/
extern DECLSPEC int SDLCALL TTF_MeasureUTF8(TTF_Font *font, const char *text, int measure_width, int *extent, int *count);
/**
* Calculate how much of a UCS-2 string will fit in a given width.
*
* This reports the number of characters that can be rendered before reaching
* `measure_width`.
*
* This does not need to render the string to do this calculation.
*
* Please note that this function is named "Unicode" but currently expects
* UCS-2 encoding (16 bits per codepoint). This does not give you access to
* large Unicode values, such as emoji glyphs. These codepoints are accessible
* through the UTF-8 version of this function.
*
* \param font the font to query.
* \param text text to calculate, in UCS-2 encoding.
* \param measure_width maximum width, in pixels, available for the string.
* \param count on return, filled with number of characters that can be
* rendered.
* \param extent on return, filled with latest calculated width.
* \returns 0 if successful, -1 on error.
*
* \since This function is available since SDL_ttf 2.0.18.
*
* \sa TTF_MeasureText
* \sa TTF_MeasureUTF8
* \sa TTF_MeasureUNICODE
*/
extern DECLSPEC int SDLCALL TTF_MeasureUNICODE(TTF_Font *font, const Uint16 *text, int measure_width, int *extent, int *count);
/**
* Render Latin1 text at fast quality to a new 8-bit surface.
*
* This function will allocate a new 8-bit, palettized surface. The surface's
* 0 pixel will be the colorkey, giving a transparent background. The 1 pixel
* will be set to the text color.
*
* This will not word-wrap the string; you'll get a surface with a single line
* of text, as long as the string requires. You can use
* TTF_RenderText_Solid_Wrapped() instead if you need to wrap the output to
* multiple lines.
*
* This will not wrap on newline characters.
*
* You almost certainly want TTF_RenderUTF8_Solid() unless you're sure you
* have a 1-byte Latin1 encoding. US ASCII characters will work with either
* function, but most other Unicode characters packed into a `const char *`
* will need UTF-8.
*
* You can render at other quality levels with TTF_RenderText_Shaded,
* TTF_RenderText_Blended, and TTF_RenderText_LCD.
*
* \param font the font to render with.
* \param text text to render, in Latin1 encoding.
* \param fg the foreground color for the text.
* \returns a new 8-bit, palettized surface, or NULL if there was an error.
*
* \since This function is available since SDL_ttf 2.0.12.
*
* \sa TTF_RenderUTF8_Solid
* \sa TTF_RenderUNICODE_Solid
*/
extern DECLSPEC SDL_Surface * SDLCALL TTF_RenderText_Solid(TTF_Font *font,
const char *text, SDL_Color fg);