platform_types.h File Reference

Definitions of platform-dependent types. More...

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Macros
#define	FL_COMMAND   opaque
	An alias for FL_CTRL on Windows and X11, or FL_META on MacOS X.
#define	FL_CONTROL   opaque
	An alias for FL_META on Windows and X11, or FL_CTRL on MacOS X.

Typedefs
typedef opaque	fl_intptr_t
	An integral type large enough to store a pointer or a long value. More...
typedef opaque	Fl_Offscreen
	Platform-specific value representing an offscreen drawing buffer. More...
typedef struct opaque *	Fl_Region
	Pointer to a platform-specific structure representing a collection of rectangles. More...
typedef opaque	FL_SOCKET
	socket or file descriptor
typedef opaque	Fl_Timestamp
	Platform-specific point in time, used for delta time calculation. More...
typedef opaque	fl_uintptr_t
	An unsigned integral type large enough to store a pointer or an unsigned long value. More...
typedef struct opaque *	GLContext
	Pointer to a platform-specific structure representing the window's OpenGL rendering context. More...

Detailed Description

Definitions of platform-dependent types.

The exact nature of these types varies with the platform. Therefore, portable FLTK applications should not assume these types have a specific size, or that they are pointers.

Typedef Documentation

fl_intptr_t

typedef opaque fl_intptr_t

An integral type large enough to store a pointer or a long value.

A pointer value can be safely cast to fl_intptr_t, and later cast back to its initial pointer type without change to the pointer value. A variable of type fl_intptr_t can also store a long int value.

Fl_Offscreen

typedef opaque Fl_Offscreen

Platform-specific value representing an offscreen drawing buffer.

Note

This value can be safely cast to these types on each platform:

• X11: Pixmap
• Wayland: cairo_t *
• Windows: HBITMAP
• macOS: CGContextRef

Fl_Region

typedef struct opaque* Fl_Region

Pointer to a platform-specific structure representing a collection of rectangles.

Note

This pointer can be safely cast to these types on each platform:

• X11: Region as defined by X11
• Wayland: cairo_region_t *
• Windows: HRGN
• macOS: struct flCocoaRegion *

Fl_Timestamp

typedef opaque Fl_Timestamp

Platform-specific point in time, used for delta time calculation.

Note

This type may be a struct. sizeof(Fl_Timestamp) may be different on different platforms. Fl_Timestamp may change with future ABI changes.

fl_uintptr_t

typedef opaque fl_uintptr_t

An unsigned integral type large enough to store a pointer or an unsigned long value.

A pointer value can be safely cast to fl_uintptr_t, and later cast back to its initial pointer type without change to the pointer value. A variable of type fl_uintptr_t can also store an unsigned long int value.

GLContext

typedef struct opaque* GLContext

Pointer to a platform-specific structure representing the window's OpenGL rendering context.

Note

This pointer can be safely cast to these types on each platform:

• X11: GLXContext
• Wayland: EGLContext
• Windows: HGLRC
• macOS: NSOpenGLContext *