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/*
* Header file for gtkfont.c. Has to be separate from unix.h
* because it depends on GTK data types, hence can't be included
* from cross-platform code (which doesn't go near GTK).
*/
#ifndef PUTTY_GTKFONT_H
#define PUTTY_GTKFONT_H
/*
* We support two entirely different drawing systems: the old
* GDK1/GDK2 one which works on server-side X drawables, and the
* new-style Cairo one. GTK1 only supports GDK drawing; GTK3 only
* supports Cairo; GTK2 supports both, but deprecates GTK, so we only
* enable it if we aren't trying on purpose to compile without the
* deprecated functions.
*
* Our different font classes may prefer different drawing systems: X
* server-side fonts are a lot faster to draw with GDK, but for
* everything else we prefer Cairo, on general grounds of modernness
* and also in particular because its matrix-based scaling system
* gives much nicer results for double-width and double-height text
* when a scalable font is in use.
*/
#if !GTK_CHECK_VERSION(3,0,0) && !defined GDK_DISABLE_DEPRECATED
#define DRAW_TEXT_GDK
#endif
#if GTK_CHECK_VERSION(2,8,0)
#define DRAW_TEXT_CAIRO
#endif
#if GTK_CHECK_VERSION(3,0,0) || defined GDK_DISABLE_DEPRECATED
/*
* Where the facility is available, we prefer to render text on to a
* persistent server-side pixmap, and redraw windows by simply
* blitting rectangles of that pixmap into them as needed. This is
* better for performance since we avoid expensive font rendering
* calls where possible, and it's particularly good over a non-local X
* connection because the response to an expose event can now be a
* very simple rectangle-copy operation rather than a lot of fiddly
* drawing or bitmap transfer.
*
* However, GTK is deprecating the use of server-side pixmaps, so we
* have to disable this mode under some circumstances.
*/
#define NO_BACKING_PIXMAPS
#endif
/*
* Exports from gtkfont.c.
*/
typedef struct UnifontVtable UnifontVtable; /* contents internal to
* gtkfont.c */
typedef struct unifont {
const struct UnifontVtable *vt;
/*
* `Non-static data members' of the `class', accessible to
* external code.
*/
/*
* public_charset is the charset used when the user asks for
* `Use font encoding'.
*/
int public_charset;
/*
* Font dimensions needed by clients.
*/
int width, height, ascent, descent, strikethrough_y;
/*
* Indicates whether this font is capable of handling all glyphs
* (Pango fonts can do this because Pango automatically supplies
* missing glyphs from other fonts), or whether it would like a
* fallback font to cope with missing glyphs.
*/
bool want_fallback;
/*
* Preferred drawing API to use when this class of font is active.
* (See the enum below, in unifont_drawctx.)
*/
int preferred_drawtype;
} unifont;
/* A default drawtype, for the case where no font exists to make the
* decision with. */
#ifdef DRAW_TEXT_CAIRO
#define DRAW_DEFAULT_CAIRO
#define DRAWTYPE_DEFAULT DRAWTYPE_CAIRO
#elif defined DRAW_TEXT_GDK
#define DRAW_DEFAULT_GDK
#define DRAWTYPE_DEFAULT DRAWTYPE_GDK
#else
#error No drawtype available at all
#endif
/*
* Drawing context passed in to unifont_draw_text, which contains
* everything required to know where and how to draw the requested
* text.
*/
typedef struct unifont_drawctx {
enum {
#ifdef DRAW_TEXT_GDK
DRAWTYPE_GDK,
#endif
#ifdef DRAW_TEXT_CAIRO
DRAWTYPE_CAIRO,
#endif
DRAWTYPE_NTYPES
} type;
union {
#ifdef DRAW_TEXT_GDK
struct {
GdkDrawable *target;
GdkGC *gc;
} gdk;
#endif
#ifdef DRAW_TEXT_CAIRO
struct {
/* Need an actual widget, in order to backtrack to its X
* screen number when creating server-side pixmaps */
GtkWidget *widget;
cairo_t *cr;
cairo_matrix_t origmatrix;
#if GTK_CHECK_VERSION(3,22,0)
GdkWindow *gdkwin;
GdkDrawingContext *drawctx;
#endif
} cairo;
#endif
} u;
} unifont_drawctx;
unifont *unifont_create(GtkWidget *widget, const char *name,
bool wide, bool bold,
int shadowoffset, bool shadowalways);
void unifont_destroy(unifont *font);
void unifont_draw_text(unifont_drawctx *ctx, unifont *font,
int x, int y, const wchar_t *string, int len,
bool wide, bool bold, int cellwidth);
/* Same as unifont_draw_text, but expects 'string' to contain one
* normal char plus combining chars, and overdraws them all in the
* same character cell. */
void unifont_draw_combining(unifont_drawctx *ctx, unifont *font,
int x, int y, const wchar_t *string, int len,
bool wide, bool bold, int cellwidth);
/* Return a name that will select a bigger/smaller font than this one,
* or NULL if no such name is available. */
char *unifont_size_increment(unifont *font, int increment);
/*
* This function behaves exactly like the low-level unifont_create,
* except that as well as the requested font it also allocates (if
* necessary) a fallback font for filling in replacement glyphs.
*
* Return value is usable with unifont_destroy and unifont_draw_text
* as if it were an ordinary unifont.
*/
unifont *multifont_create(GtkWidget *widget, const char *name,
bool wide, bool bold,
int shadowoffset, bool shadowalways);
/*
* Unified font selector dialog. I can't be bothered to do a
* proper GTK subclassing today, so this will just be an ordinary
* data structure with some useful members.
*
* (Of course, these aren't the only members; this structure is
* contained within a bigger one which holds data visible only to
* the implementation.)
*/
typedef struct unifontsel {
void *user_data; /* settable by the user */
GtkWindow *window;
GtkWidget *ok_button, *cancel_button;
} unifontsel;
unifontsel *unifontsel_new(const char *wintitle);
void unifontsel_destroy(unifontsel *fontsel);
void unifontsel_set_name(unifontsel *fontsel, const char *fontname);
char *unifontsel_get_name(unifontsel *fontsel);
#endif /* PUTTY_GTKFONT_H */
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