/*
* tkUnix3d.c --
*
* This file contains the platform specific routines for
* drawing 3d borders in the Motif style.
*
* Copyright (c) 1996 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.
*
* RCS: @(#) $Id: tkUnix3d.c,v 1.2 1998/09/14 18:23:55 stanton Exp $
*/
#include "tk3d.h"
/*
* This structure is used to keep track of the extra colors used
* by Unix 3d borders.
*/
typedef struct {
TkBorder info;
GC solidGC; /* Used to draw solid relief. */
} UnixBorder;
/*
*----------------------------------------------------------------------
*
* TkpGetBorder --
*
* This function allocates a new TkBorder structure.
*
* Results:
* Returns a newly allocated TkBorder.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
TkBorder *
TkpGetBorder()
{
UnixBorder *borderPtr = (UnixBorder *) ckalloc(sizeof(UnixBorder));
borderPtr->solidGC = None;
return (TkBorder *) borderPtr;
}
/*
*----------------------------------------------------------------------
*
* TkpFreeBorder --
*
* This function frees any colors allocated by the platform
* specific part of this module.
*
* Results:
* None.
*
* Side effects:
* May deallocate some colors.
*
*----------------------------------------------------------------------
*/
void
TkpFreeBorder(borderPtr)
TkBorder *borderPtr;
{
UnixBorder *unixBorderPtr = (UnixBorder *) borderPtr;
Display *display = DisplayOfScreen(borderPtr->screen);
if (unixBorderPtr->solidGC != None) {
Tk_FreeGC(display, unixBorderPtr->solidGC);
}
}
/*
*--------------------------------------------------------------
*
* Tk_3DVerticalBevel --
*
* This procedure draws a vertical bevel along one side of
* an object. The bevel is always rectangular in shape:
* |||
* |||
* |||
* |||
* |||
* |||
* An appropriate shadow color is chosen for the bevel based
* on the leftBevel and relief arguments. Normally this
* procedure is called first, then Tk_3DHorizontalBevel is
* called next to draw neat corners.
*
* Results:
* None.
*
* Side effects:
* Graphics are drawn in drawable.
*
*--------------------------------------------------------------
*/
void
Tk_3DVerticalBevel(tkwin, drawable, border, x, y, width, height,
leftBevel, relief)
Tk_Window tkwin; /* Window for which border was allocated. */
Drawable drawable; /* X window or pixmap in which to draw. */
Tk_3DBorder border; /* Token for border to draw. */
int x, y, width, height; /* Area of vertical bevel. */
int leftBevel; /* Non-zero means this bevel forms the
* left side of the object; 0 means it
* forms the right side. */
int relief; /* Kind of bevel to draw. For example,
* TK_RELIEF_RAISED means interior of
* object should appear higher than
* exterior. */
{
TkBorder *borderPtr = (TkBorder *) border;
GC left, right;
Display *display = Tk_Display(tkwin);
if ((borderPtr->lightGC == None) && (relief != TK_RELIEF_FLAT)) {
TkpGetShadows(borderPtr, tkwin);
}
if (relief == TK_RELIEF_RAISED) {
XFillRectangle(display, drawable,
(leftBevel) ? borderPtr->lightGC : borderPtr->darkGC,
x, y, (unsigned) width, (unsigned) height);
} else if (relief == TK_RELIEF_SUNKEN) {
XFillRectangle(display, drawable,
(leftBevel) ? borderPtr->darkGC : borderPtr->lightGC,
x, y, (unsigned) width, (unsigned) height);
} else if (relief == TK_RELIEF_RIDGE) {
int half;
left = borderPtr->lightGC;
right = borderPtr->darkGC;
ridgeGroove:
half = width/2;
if (!leftBevel && (width & 1)) {
half++;
}
XFillRectangle(display, drawable, left, x, y, (unsigned) half,
(unsigned) height);
XFillRectangle(display, drawable, right, x+half, y,
(unsigned) (width-half), (unsigned) height);
} else if (relief == TK_RELIEF_GROOVE) {
left = borderPtr->darkGC;
right = borderPtr->lightGC;
goto ridgeGroove;
} else if (relief == TK_RELIEF_FLAT) {
XFillRectangle(display, drawable, borderPtr->bgGC, x, y,
(unsigned) width, (unsigned) height);
} else if (relief == TK_RELIEF_SOLID) {
UnixBorder *unixBorderPtr = (UnixBorder *) borderPtr;
if (unixBorderPtr->solidGC == None) {
XGCValues gcValues;
gcValues.foreground = BlackPixelOfScreen(borderPtr->screen);
unixBorderPtr->solidGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
}
XFillRectangle(display, drawable, unixBorderPtr->solidGC, x, y,
(unsigned) width, (unsigned) height);
}
}
/*
*--------------------------------------------------------------
*
* Tk_3DHorizontalBevel --
*
* This procedure draws a horizontal bevel along one side of
* an object. The bevel has mitered corners (depending on
* leftIn and rightIn arguments).
*
* Results:
* None.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
void
Tk_3DHorizontalBevel(tkwin, drawable, border, x, y, width, height,
leftIn, rightIn, topBevel, relief)
Tk_Window tkwin; /* Window for which border was allocated. */
Drawable drawable; /* X window or pixmap in which to draw. */
Tk_3DBorder border; /* Token for border to draw. */
int x, y, width, height; /* Bounding box of area of bevel. Height
* gives width of border. */
int leftIn, rightIn; /* Describes whether the left and right
* edges of the bevel angle in or out as
* they go down. For example, if "leftIn"
* is true, the left side of the bevel
* looks like this:
* ___________
* __________
* _________
* ________
*/
int topBevel; /* Non-zero means this bevel forms the
* top side of the object; 0 means it
* forms the bottom side. */
int relief; /* Kind of bevel to draw. For example,
* TK_RELIEF_RAISED means interior of
* object should appear higher than
* exterior. */
{
TkBorder *borderPtr = (TkBorder *) border;
Display *display = Tk_Display(tkwin);
int bottom, halfway, x1, x2, x1Delta, x2Delta;
UnixBorder *unixBorderPtr = (UnixBorder *) borderPtr;
GC topGC = None, bottomGC = None;
/* Initializations needed only to prevent
* compiler warnings. */
if ((borderPtr->lightGC == None) && (relief != TK_RELIEF_FLAT) &&
(relief != TK_RELIEF_SOLID)) {
TkpGetShadows(borderPtr, tkwin);
}
/*
* Compute a GC for the top half of the bevel and a GC for the
* bottom half (they're the same in many cases).
*/
switch (relief) {
case TK_RELIEF_FLAT:
topGC = bottomGC = borderPtr->bgGC;
break;
case TK_RELIEF_GROOVE:
topGC = borderPtr->darkGC;
bottomGC = borderPtr->lightGC;
break;
case TK_RELIEF_RAISED:
topGC = bottomGC =
(topBevel) ? borderPtr->lightGC : borderPtr->darkGC;
break;
case TK_RELIEF_RIDGE:
topGC = borderPtr->lightGC;
bottomGC = borderPtr->darkGC;
break;
case TK_RELIEF_SOLID:
if (unixBorderPtr->solidGC == None) {
XGCValues gcValues;
gcValues.foreground = BlackPixelOfScreen(borderPtr->screen);
unixBorderPtr->solidGC = Tk_GetGC(tkwin, GCForeground,
&gcValues);
}
XFillRectangle(display, drawable, unixBorderPtr->solidGC, x, y,
(unsigned) width, (unsigned) height);
return;
case TK_RELIEF_SUNKEN:
topGC = bottomGC =
(topBevel) ? borderPtr->darkGC : borderPtr->lightGC;
break;
}
/*
* Compute various other geometry-related stuff.
*/
x1 = x;
if (!leftIn) {
x1 += height;
}
x2 = x+width;
if (!rightIn) {
x2 -= height;
}
x1Delta = (leftIn) ? 1 : -1;
x2Delta = (rightIn) ? -1 : 1;
halfway = y + height/2;
if (!topBevel && (height & 1)) {
halfway++;
}
bottom = y + height;
/*
* Draw one line for each y-coordinate covered by the bevel.
*/
for ( ; y < bottom; y++) {
/*
* In some weird cases (such as large border widths for skinny
* rectangles) x1 can be >= x2. Don't draw the lines
* in these cases.
*/
if (x1 < x2) {
XFillRectangle(display, drawable,
(y < halfway) ? topGC : bottomGC, x1, y,
(unsigned) (x2-x1), (unsigned) 1);
}
x1 += x1Delta;
x2 += x2Delta;
}
}
/*
*----------------------------------------------------------------------
*
* TkpGetShadows --
*
* This procedure computes the shadow colors for a 3-D border
* and fills in the corresponding fields of the Border structure.
* It's called lazily, so that the colors aren't allocated until
* something is actually drawn with them. That way, if a border
* is only used for flat backgrounds the shadow colors will
* never be allocated.
*
* Results:
* None.
*
* Side effects:
* The lightGC and darkGC fields in borderPtr get filled in,
* if they weren't already.
*
*----------------------------------------------------------------------
*/
void
TkpGetShadows(borderPtr, tkwin)
TkBorder *borderPtr; /* Information about border. */
Tk_Window tkwin; /* Window where border will be used for
* drawing. */
{
XColor lightColor, darkColor;
int stressed, tmp1, tmp2;
XGCValues gcValues;
if (borderPtr->lightGC != None) {
return;
}
stressed = TkpCmapStressed(tkwin, borderPtr->colormap);
/*
* First, handle the case of a color display with lots of colors.
* The shadow colors get computed using whichever formula results
* in the greatest change in color:
* 1. Lighter shadow is half-way to white, darker shadow is half
* way to dark.
* 2. Lighter shadow is 40% brighter than background, darker shadow
* is 40% darker than background.
*/
if (!stressed && (Tk_Depth(tkwin) >= 6)) {
/*
* This is a color display with lots of colors. For the dark
* shadow, cut 40% from each of the background color components.
* For the light shadow, boost each component by 40% or half-way
* to white, whichever is greater (the first approach works
* better for unsaturated colors, the second for saturated ones).
*/
darkColor.red = (60 * (int) borderPtr->bgColorPtr->red)/100;
darkColor.green = (60 * (int) borderPtr->bgColorPtr->green)/100;
darkColor.blue = (60 * (int) borderPtr->bgColorPtr->blue)/100;
borderPtr->darkColorPtr = Tk_GetColorByValue(tkwin, &darkColor);
gcValues.foreground = borderPtr->darkColorPtr->pixel;
borderPtr->darkGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
/*
* Compute the colors using integers, not using lightColor.red
* etc.: these are shorts and may have problems with integer
* overflow.
*/
tmp1 = (14 * (int) borderPtr->bgColorPtr->red)/10;
if (tmp1 > MAX_INTENSITY) {
tmp1 = MAX_INTENSITY;
}
tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->red)/2;
lightColor.red = (tmp1 > tmp2) ? tmp1 : tmp2;
tmp1 = (14 * (int) borderPtr->bgColorPtr->green)/10;
if (tmp1 > MAX_INTENSITY) {
tmp1 = MAX_INTENSITY;
}
tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->green)/2;
lightColor.green = (tmp1 > tmp2) ? tmp1 : tmp2;
tmp1 = (14 * (int) borderPtr->bgColorPtr->blue)/10;
if (tmp1 > MAX_INTENSITY) {
tmp1 = MAX_INTENSITY;
}
tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->blue)/2;
lightColor.blue = (tmp1 > tmp2) ? tmp1 : tmp2;
borderPtr->lightColorPtr = Tk_GetColorByValue(tkwin, &lightColor);
gcValues.foreground = borderPtr->lightColorPtr->pixel;
borderPtr->lightGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
return;
}
if (borderPtr->shadow == None) {
borderPtr->shadow = Tk_GetBitmap((Tcl_Interp *) NULL, tkwin,
Tk_GetUid("gray50"));
if (borderPtr->shadow == None) {
panic("TkpGetShadows couldn't allocate bitmap for border");
}
}
if (borderPtr->visual->map_entries > 2) {
/*
* This isn't a monochrome display, but the colormap either
* ran out of entries or didn't have very many to begin with.
* Generate the light shadows with a white stipple and the
* dark shadows with a black stipple.
*/
gcValues.foreground = borderPtr->bgColorPtr->pixel;
gcValues.background = BlackPixelOfScreen(borderPtr->screen);
gcValues.stipple = borderPtr->shadow;
gcValues.fill_style = FillOpaqueStippled;
borderPtr->darkGC = Tk_GetGC(tkwin,
GCForeground|GCBackground|GCStipple|GCFillStyle, &gcValues);
gcValues.background = WhitePixelOfScreen(borderPtr->screen);
borderPtr->lightGC = Tk_GetGC(tkwin,
GCForeground|GCBackground|GCStipple|GCFillStyle, &gcValues);
return;
}
/*
* This is just a measly monochrome display, hardly even worth its
* existence on this earth. Make one shadow a 50% stipple and the
* other the opposite of the background.
*/
gcValues.foreground = WhitePixelOfScreen(borderPtr->screen);
gcValues.background = BlackPixelOfScreen(borderPtr->screen);
gcValues.stipple = borderPtr->shadow;
gcValues.fill_style = FillOpaqueStippled;
borderPtr->lightGC = Tk_GetGC(tkwin,
GCForeground|GCBackground|GCStipple|GCFillStyle, &gcValues);
if (borderPtr->bgColorPtr->pixel
== WhitePixelOfScreen(borderPtr->screen)) {
gcValues.foreground = BlackPixelOfScreen(borderPtr->screen);
borderPtr->darkGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
} else {
borderPtr->darkGC = borderPtr->lightGC;
borderPtr->lightGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
}
}