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-rw-r--r--unix/tkUnix3d.c88
1 files changed, 64 insertions, 24 deletions
diff --git a/unix/tkUnix3d.c b/unix/tkUnix3d.c
index 82cccdb..9a72da9 100644
--- a/unix/tkUnix3d.c
+++ b/unix/tkUnix3d.c
@@ -9,7 +9,7 @@
* 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 1.3 1999/03/10 07:04:45 stanton Exp $
+ * RCS: @(#) $Id: tkUnix3d.c,v 1.4 2000/04/13 18:25:44 ericm Exp $
*/
#include <tk3d.h>
@@ -339,6 +339,7 @@ TkpGetShadows(borderPtr, tkwin)
{
XColor lightColor, darkColor;
int stressed, tmp1, tmp2;
+ int r, g, b;
XGCValues gcValues;
if (borderPtr->lightGC != None) {
@@ -360,42 +361,81 @@ TkpGetShadows(borderPtr, tkwin)
/*
* This is a color display with lots of colors. For the dark
* shadow, cut 40% from each of the background color components.
+ * But if the background is already very dark, make the
+ * dark color a little lighter than the background by increasing
+ * each color component 1/4th of the way to MAX_INTENSITY.
+ *
* 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).
+ * But if the background is already very bright, instead choose a
+ * slightly darker color for the light shadow by reducing each
+ * color component by 10%.
+ *
+ * Compute the colors using integers, not using lightColor.red
+ * etc.: these are shorts and may have problems with integer
+ * overflow.
+ */
+
+ /*
+ * Compute the dark shadow color
+ */
+
+ r = (int) borderPtr->bgColorPtr->red;
+ g = (int) borderPtr->bgColorPtr->green;
+ b = (int) borderPtr->bgColorPtr->blue;
+
+ if (r*0.5*r + g*1.0*g + b*0.28*b < MAX_INTENSITY*0.05*MAX_INTENSITY) {
+ darkColor.red = (MAX_INTENSITY + 3*r)/4;
+ darkColor.green = (MAX_INTENSITY + 3*g)/4;
+ darkColor.blue = (MAX_INTENSITY + 3*b)/4;
+ } else {
+ darkColor.red = (60 * r)/100;
+ darkColor.green = (60 * g)/100;
+ darkColor.blue = (60 * b)/100;
+ }
+
+ /*
+ * Allocate the dark shadow color and its GC
*/
- 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.
+ * Compute the light shadow color
*/
- 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;
+ if (g > MAX_INTENSITY*85/100) {
+ lightColor.red = (90 * r)/100;
+ lightColor.green = (90 * g)/100;
+ lightColor.blue = (90 * b)/100;
+ } else {
+ tmp1 = (14 * r)/10;
+ if (tmp1 > MAX_INTENSITY) {
+ tmp1 = MAX_INTENSITY;
+ }
+ tmp2 = (MAX_INTENSITY + r)/2;
+ lightColor.red = (tmp1 > tmp2) ? tmp1 : tmp2;
+ tmp1 = (14 * g)/10;
+ if (tmp1 > MAX_INTENSITY) {
+ tmp1 = MAX_INTENSITY;
+ }
+ tmp2 = (MAX_INTENSITY + g)/2;
+ lightColor.green = (tmp1 > tmp2) ? tmp1 : tmp2;
+ tmp1 = (14 * b)/10;
+ if (tmp1 > MAX_INTENSITY) {
+ tmp1 = MAX_INTENSITY;
+ }
+ tmp2 = (MAX_INTENSITY + b)/2;
+ lightColor.blue = (tmp1 > tmp2) ? tmp1 : tmp2;
}
- tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->blue)/2;
- lightColor.blue = (tmp1 > tmp2) ? tmp1 : tmp2;
+
+ /*
+ * Allocate the light shadow color and its GC
+ */
+
borderPtr->lightColorPtr = Tk_GetColorByValue(tkwin, &lightColor);
gcValues.foreground = borderPtr->lightColorPtr->pixel;
borderPtr->lightGC = Tk_GetGC(tkwin, GCForeground, &gcValues);