| /* | |
| * tkColor.h -- | |
| * | |
| * Declarations of data types and functions used by the Tk color module. | |
| * | |
| * Copyright (c) 1996-1997 by Sun Microsystems, Inc. | |
| * | |
| * See the file "license.terms" for information on usage and redistribution of | |
| * this file, and for a DISCLAIMER OF ALL WARRANTIES. | |
| */ | |
| /* | |
| * One of the following data structures is used to keep track of each color | |
| * that is being used by the application; typically there is a colormap entry | |
| * allocated for each of these colors. | |
| */ | |
| typedef struct TkColor { | |
| XColor color; /* Information about this color. */ | |
| unsigned int magic; /* Used for quick integrity check on this | |
| * structure. Must always have the value | |
| * COLOR_MAGIC. */ | |
| GC gc; /* Simple gc with this color as foreground | |
| * color and all other fields defaulted. May | |
| * be NULL. */ | |
| Screen *screen; /* Screen where this color is valid. Used to | |
| * delete it, and to find its display. */ | |
| Colormap colormap; /* Colormap from which this entry was | |
| * allocated. */ | |
| Visual *visual; /* Visual associated with colormap. */ | |
| int resourceRefCount; /* Number of active uses of this color (each | |
| * active use corresponds to a call to | |
| * Tk_AllocColorFromObj or Tk_GetColor). If | |
| * this count is 0, then this TkColor | |
| * structure is no longer valid and it isn't | |
| * present in a hash table: it is being kept | |
| * around only because there are objects | |
| * referring to it. The structure is freed | |
| * when resourceRefCount and objRefCount are | |
| * both 0. */ | |
| int objRefCount; /* The number of Tcl objects that reference | |
| * this structure. */ | |
| int type; /* TK_COLOR_BY_NAME or TK_COLOR_BY_VALUE. */ | |
| Tcl_HashEntry *hashPtr; /* Pointer to hash table entry for this | |
| * structure. (for use in deleting entry). */ | |
| struct TkColor *nextPtr; /* Points to the next TkColor structure with | |
| * the same color name. Colors with the same | |
| * name but different screens or colormaps are | |
| * chained together off a single entry in | |
| * nameTable. For colors in valueTable (those | |
| * allocated by Tk_GetColorByValue) this field | |
| * is always NULL. */ | |
| } TkColor; | |
| /* | |
| * Common APIs exported from all platform-specific implementations. | |
| */ | |
| MODULE_SCOPE void TkpFreeColor(TkColor *tkColPtr); | |
| MODULE_SCOPE TkColor * TkpGetColor(Tk_Window tkwin, Tk_Uid name); | |
| MODULE_SCOPE TkColor * TkpGetColorByValue(Tk_Window tkwin, XColor *colorPtr); | |