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//
// "$Id$"
//
// WIN32 color functions for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// The fltk "colormap". This allows ui colors to be stored in 8-bit
// locations, and provides a level of indirection so that global color
// changes can be made. Not to be confused with the X colormap, which
// I try to hide completely.
// SGI compiler seems to have problems with unsigned char arguments
// being used to index arrays. So I always copy them to an integer
// before use.
#include <config.h>
#include <FL/Fl.H>
#include <FL/x.H>
#include <FL/fl_draw.H>
static unsigned fl_cmap[256] = {
#include "fl_cmap.h" // this is a file produced by "cmap.cxx":
};
// Translations to win32 data structures:
Fl_XMap fl_xmap[256];
Fl_XMap* fl_current_xmap;
HPALETTE fl_palette;
static HGDIOBJ tmppen=0;
static HPEN savepen=0;
void fl_cleanup_pens(void) {
for (int i=0; i<256; i++) {
if (fl_xmap[i].pen) DeleteObject(fl_xmap[i].pen);
}
}
void fl_save_pen(void) {
if(!tmppen) tmppen = CreatePen(PS_SOLID, 1, 0);
savepen = (HPEN)SelectObject(fl_gc, tmppen);
}
void fl_restore_pen(void) {
if (savepen) SelectObject(fl_gc, savepen);
DeleteObject(tmppen);
tmppen = 0;
savepen = 0;
}
static void clear_xmap(Fl_XMap& xmap) {
if (xmap.pen) {
HGDIOBJ tmppen = GetStockObject(BLACK_PEN);
HGDIOBJ oldpen = SelectObject(fl_gc, tmppen); // Push out the current pen of the gc
if(oldpen != xmap.pen) SelectObject(fl_gc, oldpen); // Put it back if it is not the one we are about to delete
DeleteObject((HGDIOBJ)(xmap.pen));
xmap.pen = 0;
xmap.brush = -1;
}
}
static void set_xmap(Fl_XMap& xmap, COLORREF c) {
xmap.rgb = c;
if (xmap.pen) {
HGDIOBJ oldpen = SelectObject(fl_gc,GetStockObject(BLACK_PEN)); // replace current pen with safe one
if (oldpen != xmap.pen)SelectObject(fl_gc,oldpen); // if old one not xmap.pen, need to put it back
DeleteObject(xmap.pen); // delete pen
}
xmap.pen = CreatePen(PS_SOLID, 1, xmap.rgb); // get a pen into xmap.pen
xmap.brush = -1;
}
void Fl_GDI_Graphics_Driver::color(Fl_Color i) {
if (i & 0xffffff00) {
unsigned rgb = (unsigned)i;
fl_color((uchar)(rgb >> 24), (uchar)(rgb >> 16), (uchar)(rgb >> 8));
} else {
Fl_Graphics_Driver::color(i);
Fl_XMap &xmap = fl_xmap[i];
if (!xmap.pen) {
#if USE_COLORMAP
if (fl_palette) {
set_xmap(xmap, PALETTEINDEX(i));
} else {
#endif
unsigned c = fl_cmap[i];
set_xmap(xmap, RGB(uchar(c>>24), uchar(c>>16), uchar(c>>8)));
#if USE_COLORMAP
}
#endif
}
fl_current_xmap = ⟼
SelectObject(fl_gc, (HGDIOBJ)(xmap.pen));
}
}
void Fl_GDI_Graphics_Driver::color(uchar r, uchar g, uchar b) {
static Fl_XMap xmap;
COLORREF c = RGB(r,g,b);
Fl_Graphics_Driver::color( fl_rgb_color(r, g, b) );
if (!xmap.pen || c != xmap.rgb) {
clear_xmap(xmap);
set_xmap(xmap, c);
}
fl_current_xmap = ⟼
SelectObject(fl_gc, (HGDIOBJ)(xmap.pen));
}
HBRUSH fl_brush() {
return fl_brush_action(0);
}
HBRUSH fl_brush_action(int action) {
Fl_XMap *xmap = fl_current_xmap;
// Wonko: we use some statistics to cache only a limited number
// of brushes:
#define FL_N_BRUSH 16
static struct Fl_Brush {
HBRUSH brush;
unsigned short usage;
Fl_XMap* backref;
} brushes[FL_N_BRUSH];
if (action) {
SelectObject(fl_gc, GetStockObject(BLACK_BRUSH)); // Load stock object
for (int i=0; i<FL_N_BRUSH; i++) {
if (brushes[i].brush)
DeleteObject(brushes[i].brush); // delete all brushes in array
}
return NULL;
}
int i = xmap->brush; // find the associated brush
if (i != -1) { // if the brush was allready allocated
if (brushes[i].brush == NULL) goto CREATE_BRUSH;
if ( (++brushes[i].usage) > 32000 ) { // keep a usage statistic
for (int j=0; j<FL_N_BRUSH; j++) {
if (brushes[j].usage>16000)
brushes[j].usage -= 16000;
else
brushes[j].usage = 0;
}
}
return brushes[i].brush;
} else {
int umin = 32000, imin = 0;
for (i=0; i<FL_N_BRUSH; i++) {
if (brushes[i].brush == NULL) goto CREATE_BRUSH;
if (brushes[i].usage<umin) {
umin = brushes[i].usage;
imin = i;
}
}
i = imin;
HGDIOBJ tmpbrush = GetStockObject(BLACK_BRUSH); // get a stock brush
HGDIOBJ oldbrush = SelectObject(fl_gc,tmpbrush); // load in into current context
if (oldbrush != brushes[i].brush) SelectObject(fl_gc,oldbrush); // reload old one
DeleteObject(brushes[i].brush); // delete the one in list
brushes[i].brush = NULL;
brushes[i].backref->brush = -1;
}
CREATE_BRUSH:
brushes[i].brush = CreateSolidBrush(xmap->rgb);
brushes[i].usage = 0;
brushes[i].backref = xmap;
xmap->brush = i;
return brushes[i].brush;
}
void Fl::free_color(Fl_Color i, int overlay) {
if (overlay) return; // do something about GL overlay?
clear_xmap(fl_xmap[i]);
}
void Fl::set_color(Fl_Color i, unsigned c) {
if (fl_cmap[i] != c) {
clear_xmap(fl_xmap[i]);
fl_cmap[i] = c;
}
}
#if USE_COLORMAP
// 'fl_select_palette()' - Make a color palette for 8-bit displays if necessary
// Thanks to Michael Sweet @ Easy Software Products for this
HPALETTE
fl_select_palette(void)
{
static char beenhere;
if (!beenhere) {
beenhere = 1;
//if (GetDeviceCaps(fl_gc, BITSPIXEL) > 8) return NULL;
int nColors = GetDeviceCaps(fl_gc, SIZEPALETTE);
if (nColors <= 0 || nColors > 256) return NULL;
// this will try to work on < 256 color screens, but will probably
// come out quite badly.
// I lamely try to get this variable-sized object allocated on stack:
ulong foo[(sizeof(LOGPALETTE)+256*sizeof(PALETTEENTRY))/sizeof(ulong)+1];
LOGPALETTE *pPal = (LOGPALETTE*)foo;
pPal->palVersion = 0x300;
pPal->palNumEntries = nColors;
// Build 256 colors from the standard FLTK colormap...
for (int i = 0; i < nColors; i ++) {
pPal->palPalEntry[i].peRed = (fl_cmap[i] >> 24) & 255;
pPal->palPalEntry[i].peGreen = (fl_cmap[i] >> 16) & 255;
pPal->palPalEntry[i].peBlue = (fl_cmap[i] >> 8) & 255;
pPal->palPalEntry[i].peFlags = 0;
};
// Create the palette:
fl_palette = CreatePalette(pPal);
}
if (fl_palette) {
SelectPalette(fl_gc, fl_palette, FALSE);
RealizePalette(fl_gc);
}
return fl_palette;
}
#endif
//
// End of "$Id$".
//
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