// Get border pen
void GetPatternBorder(PatternData *pattern,struct Screen *screen,ULONG border_col)
{
// Do nothing under 37
if (((struct Library *)GfxBase)->lib_Version<39) return;
// Free existing border pen
if (pattern->border_pen!=0)
{
if (pattern->border_pen==-1)
pattern->border_pen=0;
ReleasePen(screen->ViewPort.ColorMap,pattern->border_pen);
pattern->border_pen=0;
}
// Want a border pen?
if (border_col&ENVBF_USE_COLOUR)
{
// Try to allocate pen
if ((pattern->border_pen=
ObtainBestPen(
screen->ViewPort.ColorMap,
ENVBF_COL_R_GET(border_col)<<24,
ENVBF_COL_G_GET(border_col)<<24,
ENVBF_COL_B_GET(border_col)<<24,
OBP_Precision,PRECISION_IMAGE,
TAG_END))==0)
pattern->border_pen=-1;
else
if (pattern->border_pen==-1)
pattern->border_pen=0;
}
}
// Get backdrop pattern
short display_get_pattern(BOOL use_custom)
{
APTR iff;
BPTR file;
struct WBPatternPrefs pattern[NUM_PATTERNS];
short a;
char *data[NUM_PATTERNS],*filename;
short change=0;
ULONG flags=0;
// Copy from system fields to custom fields (if custom field is empty, or custom flag is not set)
for (a=0;a<4;a++)
{
if (!GUI->env_BackgroundPic[a][0] || !use_custom)
{
strcpy(GUI->env_BackgroundPic[a],environment->env->env_BackgroundPic[a]);
GUI->env_BackgroundFlags[a]=environment->env->env_BackgroundFlags[a];
GUI->env_BackgroundBorderColour[a]=environment->env->env_BackgroundBorderColour[a];
}
}
// Pattern disabled?
if (environment->env->display_options&DISPOPTF_NO_BACKDROP)
{
// Check both patterns are invalid
for (a=0;a<NUM_PATTERNS;a++)
{
// Is pattern valid?
if (GUI->pattern[a].valid)
{
// Clear existing pattern
display_update_pattern(a,0);
// Free pattern data
FreeVec(GUI->pattern[a].data);
GUI->pattern[a].data=0;
// Free pattern
FreePattern(&GUI->pattern[a]);
}
}
return 0;
}
// Use pattern prefs?
if (environment->env->display_options&DISPOPTF_USE_WBPATTERN)
{
// End pattern notification
stop_file_notify(GUI->pattern_notify);
// Get filename
filename=(IntuitionBase->LibNode.lib_Version<39)?"env:sys/wb.pat":"env:sys/wbpattern.prefs";
// User-specified file?
if (environment->env->backdrop_prefs[0])
{
BPTR lock;
// Does file exist?
if (lock=Lock(environment->env->backdrop_prefs,ACCESS_READ))
{
// Yep
UnLock(lock);
filename=environment->env->backdrop_prefs;
}
}
// Initialise pattern and data pointers
for (a=0;a<NUM_PATTERNS;a++)
{
pattern[a]=GUI->pattern[a].prefs;
data[a]=0;
}
// Try to open wbpattern prefs file
if (IntuitionBase->LibNode.lib_Version>=39 &&
(iff=IFFOpen(filename,IFF_READ,ID_PREF)))
{
ULONG id;
// Scan for chunks we know and love
while (id=IFFNextChunk(iff,0))
{
// FastIPrefs FIP0 chunk?
if (id==ID_FIP0)
{
// Get flags
IFFReadChunkBytes(iff,&flags,sizeof(flags));
}
// PTRN chunk?
else
if (id==ID_PTRN)
{
struct WBPatternPrefs *prefs;
// Allocate space for chunk
if (prefs=AllocVec(IFFChunkSize(iff),MEMF_CLEAR))
{
// Read chunk
IFFReadChunkBytes(iff,prefs,-1);
// Pattern we can handle?
if (prefs->wbp_Which==WBP_ROOT ||
prefs->wbp_Which==WBP_DRAWER)
{
// Copy data
CopyMem(
(char *)prefs,
(char *)&pattern[prefs->wbp_Which],
sizeof(struct WBPatternPrefs));
// Allocate pattern data
if (prefs->wbp_DataLength>0 &&
(data[prefs->wbp_Which]=AllocVec(prefs->wbp_DataLength+1,MEMF_CLEAR)))
{
// Copy pattern data
CopyMem((char *)(prefs+1),data[prefs->wbp_Which],prefs->wbp_DataLength);
}
}
// Free chunk
FreeVec(prefs);
}
}
}
// Close iff file
IFFClose(iff);
}
// Couldn't find it, try for wb.pat
else
if (IntuitionBase->LibNode.lib_Version<39 &&
(file=Open(filename,MODE_OLDFILE)))
{
// Allocate pattern data
if (data[PATTERN_MAIN]=AllocVec(96,MEMF_CLEAR))
{
// Skip forwards
Seek(file,20,OFFSET_CURRENT);
// Read pattern
if ((Read(file,data[PATTERN_MAIN],96))<96)
{
FreeVec(data[PATTERN_MAIN]);
data[PATTERN_MAIN]=0;
}
// Fill out WBPatternPrefs
else
{
pattern[PATTERN_MAIN].wbp_Flags=WBPF_PATTERN;
pattern[PATTERN_MAIN].wbp_Depth=GUI->screen_pointer->BitMap.Depth;
if (pattern[PATTERN_MAIN].wbp_Depth>MAXDEPTH)
pattern[PATTERN_MAIN].wbp_Depth=MAXDEPTH;
}
}
// Close file
Close(file);
}
// Start notification of wbpattern prefs
GUI->pattern_notify=start_file_notify(filename,NOTIFY_PATTERN_CHANGED,GUI->appmsg_port);
}
// Otherwise, under 39 user-defined pictures
else
if (GfxBase->LibNode.lib_Version>=39)
{
short pat;
// Do both patterns
for (pat=0;pat<NUM_PATTERNS;pat++)
{
// Got valid picture?
if (GUI->env_BackgroundPic[pat][0])
{
// Fill out WBPatternPrefs
pattern[pat].wbp_Flags=0;
pattern[pat].wbp_Which=pat;
pattern[pat].wbp_DataLength=strlen(GUI->env_BackgroundPic[pat]);
if (data[pat]=AllocVec(pattern[pat].wbp_DataLength+1,0))
strcpy(data[pat],GUI->env_BackgroundPic[pat]);
}
// Set to no pattern
else
{
// Fill out WBPatternPrefs
pattern[pat].wbp_Flags=WBPF_PATTERN;
pattern[pat].wbp_DataLength=0;
data[pat]=0;
}
}
}
// Otherwise, default to no pattern
else
{
short pat;
// Do both patterns
for (pat=0;pat<NUM_PATTERNS;pat++)
{
// Fill out WBPatternPrefs
pattern[pat].wbp_Flags=WBPF_PATTERN;
pattern[pat].wbp_DataLength=0;
data[pat]=0;
}
}
// Go through both patterns
for (a=0;a<NUM_PATTERNS;a++)
{
BOOL diff=0;
short precision=0;
// Using Opus settings?
if (!(environment->env->display_options&DISPOPTF_USE_WBPATTERN))
{
// Get precision
if (GUI->env_BackgroundFlags[a]&ENVBF_PRECISION_NONE)
precision=-1;
else
if (GUI->env_BackgroundFlags[a]&ENVBF_PRECISION_GUI)
precision=2;
else
if (GUI->env_BackgroundFlags[a]&ENVBF_PRECISION_ICON)
precision=1;
else
if (GUI->env_BackgroundFlags[a]&ENVBF_PRECISION_EXACT)
precision=3;
}
// Maybe set in prefs
else
{
// Get precision
precision=(a==0)?PATF_WB_MODE(flags):PATF_LISTER_MODE(flags);
}
// Valid data?
if (data[a])
{
// No last pattern?
if (!GUI->pattern[a].data)
{
diff=1;
}
// Changed from pattern to picture or vice versa?
else
if ((pattern[a].wbp_Flags&WBPF_PATTERN && !(GUI->pattern[a].prefs.wbp_Flags&WBPF_PATTERN)) ||
(!(pattern[a].wbp_Flags&WBPF_PATTERN) && GUI->pattern[a].prefs.wbp_Flags&WBPF_PATTERN))
{
diff=1;
}
// Pattern pattern?
else
if (pattern[a].wbp_Flags&WBPF_PATTERN)
{
// Different depth?
if (pattern[a].wbp_Depth!=GUI->pattern[a].prefs.wbp_Depth) diff=1;
// Has data changed from the last one?
else
{
short num,d;
// Get amount of data
num=PAT_HEIGHT*pattern[a].wbp_Depth;
// Compare data
for (d=0;d<num;d++)
{
if (((USHORT *)data[a])[d]!=((USHORT *)GUI->pattern[a].data)[d])
{
diff=1;
break;
}
}
}
}
// Picture?
else
{
// Different name for picture, or it's random?
if (strcmp(data[a],GUI->pattern[a].data)!=0 || GUI->pattern[a].random)
{
diff=1;
}
// Precision changed?
else
if (precision!=GUI->pattern[a].precision)
{
diff=1;
}
// Stretching changed?
else
if (a==0 &&
((GUI->env_BackgroundFlags[a]&ENVBF_STRETCH_PIC && !(GUI->pattern[a].flags&PATF_STRETCH)) ||
!(GUI->env_BackgroundFlags[a]&ENVBF_STRETCH_PIC) && (GUI->pattern[a].flags&PATF_STRETCH)))
{
diff=1;
}
// Centering changed?
else
if ((GUI->env_BackgroundFlags[a]&ENVBF_CENTER_PIC && !(GUI->pattern[a].flags&PATF_CENTER)) ||
!(GUI->env_BackgroundFlags[a]&ENVBF_CENTER_PIC) && (GUI->pattern[a].flags&PATF_CENTER))
{
diff=2;
}
}
}
// Had last data?
else
if (GUI->pattern[a].data) diff=1;
if (diff!=1)
{
// Border pen changed?
if ((GUI->env_BackgroundFlags[a]&ENVBF_USE_COLOUR && GUI->pattern[a].border_pen==0) ||
(!(GUI->env_BackgroundFlags[a]&ENVBF_USE_COLOUR) && GUI->pattern[a].border_pen!=0))
{
diff=3;
}
else
if (GUI->pattern[a].border_pen!=0 && GUI->env_BackgroundFlags[a]&ENVBF_USE_COLOUR)
{
ULONG col[3];
GetPalette32(
&GUI->screen_pointer->ViewPort,
col,
1,
(GUI->pattern[a].border_pen==-1)?0:GUI->pattern[a].border_pen);
if (ENVBF_COL_R_GET(col[0])!=ENVBF_COL_R_GET(GUI->env_BackgroundBorderColour[a]) ||
ENVBF_COL_R_GET(col[1])!=ENVBF_COL_G_GET(GUI->env_BackgroundBorderColour[a]) ||
ENVBF_COL_R_GET(col[2])!=ENVBF_COL_B_GET(GUI->env_BackgroundBorderColour[a]))
{
diff=3;
}
}
}
// Has it changed?
if (diff)
{
// Existing pattern valid?
if (GUI->pattern[a].valid)
{
// Clear existing patterns
display_update_pattern(a,0);
}
// Change more than centering?
if (diff==1)
{
// Free existing pattern
FreePattern(&GUI->pattern[a]);
FreeVec(GUI->pattern[a].data);
// Copy pattern and data pointer
GUI->pattern[a].prefs=pattern[a];
GUI->pattern[a].data=data[a];
// Stretch?
if (a==0 && GUI->env_BackgroundFlags[a]&ENVBF_STRETCH_PIC)
{
flags|=PATF_STRETCH;
flags&=~PATF_CENTER;
}
else
{
flags&=~PATF_STRETCH;
if (!(environment->env->display_options&DISPOPTF_USE_WBPATTERN) &&
GUI->env_BackgroundFlags[a]&ENVBF_CENTER_PIC)
flags|=PATF_CENTER;
else
flags&=~PATF_CENTER;
}
// Set flags and precision
GUI->pattern[a].flags=flags;
GUI->pattern[a].precision=precision;
// Initialise pattern
GetPattern(
&GUI->pattern[a],
GUI->screen_pointer,
GUI->env_BackgroundBorderColour[a]|(GUI->env_BackgroundFlags[a]&ENVBF_USE_COLOUR));
}
// Change colour
else
if (diff==3)
{
// Initialise pattern colour
GetPatternBorder(
&GUI->pattern[a],
GUI->screen_pointer,
GUI->env_BackgroundBorderColour[a]|(GUI->env_BackgroundFlags[a]&ENVBF_USE_COLOUR));
}
// Centering changed
else
{
// Environment flags set for centering?
if (!(environment->env->display_options&DISPOPTF_USE_WBPATTERN) &&
GUI->env_BackgroundFlags[a]&ENVBF_CENTER_PIC)
GUI->pattern[a].flags|=PATF_CENTER;
else
GUI->pattern[a].flags&=~PATF_CENTER;
}
// Install new pattern
display_update_pattern(a,1);
}
// If not, free data
else FreeVec(data[a]);
}
return change;
}
