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0013_Palette Control #2.pas
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Pascal/Delphi Source File
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1993-05-28
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4KB
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215 lines
Unit palette;
{$O+}
Interface
Uses Dos,Crt;
Procedure Set_palette(slot:Word; sred,sgreen,sblue : Byte);
Procedure Get_palette(Var slot,gred,ggreen,gblue : Byte);
Procedure fade_in(dly : Word ; dvsr : Byte); {Delay (ms),divisor (10-64)}
Procedure fade_out(dly : Word ; dvsr : Byte);
Procedure restore_palette;
Procedure swap_color(first,last:Byte);
Function VGASystem: Boolean;
Procedure remap;
Procedure restoremap;
Const
sl : Array[0..15] of Byte =(0,1,2,3,4,5,20,7,56,57,58,59,60,61,62,63);
v_red : Array[0..15] of Byte =(0,0,0,0,42,42,42,42,21,21,21,21,63,63,63,63);
v_green: Array[0..15] of Byte =(0,0,42,42,0,0,21,42,21,21,63,63,21,21,63,63);
v_blue : Array[0..15] of Byte =(0,42,0,42,0,42,0,42,21,63,21,63,21,63,21,63);
Var
s_red, s_green, s_blue : Array[0..15] of Real;
Implementation
Procedure disable_refresh;
Var
regs : Registers;
begin
With regs do
begin
AH:=$12;
BL:=$36;
AL:=$01;
end;
Intr($10,regs);
end;
Procedure enable_refresh;
Var
regs : Registers;
begin
With regs do
begin
AH:=$12;
BL:=$36;
AL:=$00;
end;
Intr($10,regs);
end;
Function VGASystem: Boolean;
{}
Var Regs : Registers;
begin
With Regs do
begin
Ax := $1C00;
Cx := 7;
Intr($10,Regs);
If Al = $1C then {VGA}
begin
VGASystem := True;
Exit;
end;
Ax := $1200;
Bl := $32;
Intr($10,Regs);
If Al = $12 then {MCGA}
begin
VGASystem := True;
Exit;
end;
end; {with}
end; {of func NoSnowSystem}
Procedure remap;
Var
regs : Registers;
idx : Byte;
begin
if VGASystem then
begin
With regs do
begin
AL:=0;
AH:=11;
end;
For idx:=0 to 15 do
begin
regs.BH:=idx;
regs.BL:=idx;
Intr($10,Regs);
end;
end;
end;
Procedure restoremap;
Var
regs : Registers;
idx : Byte;
begin
if VGASystem then
begin
With regs do
begin
AL:=0;
AH:=11;
end;
For idx:=0 to 15 do
begin
regs.BH:=sl[idx];
regs.BL:=idx;
Intr($10,Regs);
end;
end;
end;
Procedure Set_palette(slot:Word; sred,sgreen,sblue : Byte);
Var
regs : Registers;
begin
With regs do
begin
AL:=$10;
AH:=$10;
BX:=slot;
DH:=sred;
CH:=sgreen;
CL:=sblue;
end;
Intr($10,Regs);
end;
Procedure Get_palette(Var slot,gred,ggreen,gblue : Byte);
Var
regs : Registers;
begin
With regs do
begin
AL:=21;
AH:=16;
BX:=slot;
end;
Intr($10,Regs);
With regs do
begin
gred:=DH;
ggreen:=CH;
gblue:=CL;
end;
end;
Procedure restore_palette;
Var index:Byte;
begin
For index:=0 to 15 do
set_palette(sl[index],v_red[index],v_green[index],v_blue[index]);
end;
Procedure fade_out(dly : Word ; dvsr : Byte);
Var index,idx : Byte;
begin
For index:=0 to 15 do
begin
s_red[index]:=v_red[index];
s_green[index]:=v_green[index];
s_blue[index]:=v_blue[index];
end;
For idx:=1 to dvsr do
begin
For index:=0 to 15 do
begin
set_palette(sl[index],trunc(s_red[index]),trunc(s_green[index]),trunc(s_blue[index]));
s_red[index]:=s_red[index]-(v_red[index]/dvsr);
s_green[index]:=s_green[index]-(v_green[index]/dvsr);
s_blue[index]:=s_blue[index]-(v_blue[index]/dvsr);
end;
Delay(dly)
end;
end;
Procedure fade_in(dly : Word ; dvsr : Byte);
Var index,idx2:Byte;
begin
FillChar(s_red,Sizeof(S_red),#0);
FillChar(s_green,Sizeof(S_green),#0);
FillChar(s_blue,Sizeof(s_blue),#0);
For idx2:=1 to dvsr do
begin
For index:=0 to 15 do
begin
set_palette(sl[index],trunc(s_red[index]),trunc(s_green[index]),trunc(s_blue[index]));
s_red[index]:=s_red[index]+(v_red[index]/dvsr);
s_green[index]:=s_green[index]+(v_green[index]/dvsr);
s_blue[index]:=s_blue[index]+(v_blue[index]/dvsr);
end;
Delay(dly);
end;
end;
Procedure swap_color(first,last:Byte);
Var f1,f2,f3,l1,l2,l3:Byte;
begin
Get_Palette(sl[first],f1,f2,f3);
Get_Palette(sl[last],l1,l2,l3);
Set_Palette(sl[first],l1,l2,l3);
Set_Palette(sl[last],f1,f2,f3);
end;
begin
restoremap;
end.