U can use following code{X,Y - screen coordinates, if x <0 bmp file will be centered on the
screen
file_name - name and path of the bmp file
erro - will return a error condition (0 no error)
if error <0 it's a bmp problem
if error >0 it's a disk error ( dos error codes)
Carlos Rondao
Universidade Catolica Portuguesa
Lisboa
Portugal
Send me a note if you have any comments or problems ...}
uses dos,graph;
var
grDriver : Integer;
grMode : Integer;
ErrCode : Integer;
erro : integer;
const filename = 'c:\download\picture1.bmp'
Procedure GetEgaPal(cor :byte ;var pal:byte);assembler;
asm
mov bl,cor
mov ah,$10
mov al,$07
int $10
les DI,pal
mov ES:[DI],BH
end;
Procedure SetEgaPal(cor :byte ;pal:byte);assembler;
asm
mov bl,cor
mov bh,pal
mov ah,$10
mov al,$00
int $10
end;
Procedure SetPal16(Cor,r,g,b : byte);assembler;
asm
mov AH,$10
mov AL,$10
xor BH,BH
mov BL,cor
mov DH,r
mov CH,g
mov CL,b
int $10
end;
{=========================
Procedure GetPal16(Cor:byte;Var r,g,b : byte);assembler;
asm
mov AH,$10
mov AL,$15
xor BH,BH
mov BL,cor
int $10
les DI,r
mov ES:[DI],DH
les DI,g
mov ES:[DI],CH
les DI,b
mov ES:[DI],CL
end;
Procedure SetAllPal16(var pal ;cor,n:integer);assembler;
asm
mov AH,$10
mov AL,$12
mov BX,cor
mov CX,n
les DX,pal
int $10
end;
Procedure EgaDefault;
var i,reg : byte;
r,g,b : byte;
begin
for i:=0 to 15 do
begin
GetEgaPal(i,reg);
SetEgaPal(i,i);
GetPal16(reg,r,g,b);
SetPal16(i,r,g,b);
end;
End;
procedure Load_BMP(X,Y:integer;file_
integer);
VAR
header : array [1..27] of word;
rgb_struct : array[0..255] of record
b,g,r,cor : byte;
end;
rgb_triple : array[0..255] of record
b,g,r : byte;
end absolute rgb_struct;
pal : array[0..255] of record
red,green,blue : byte;
end;
F : File;
i,j : integer;
locer : integer;
Xp,Yp,lido,larg,larg1,alt,
word;
buf : array[1..10000] of byte;
pic_point_1,pic_point_2 : byte;
sign : array[1..2] of char absolute header;
maxX,maxY : word;
Begin
maxX := GetmaxX;
maxY := GetMaxY;
assign(f,file_name);
{$I-}
reset(f,1);
{$I+}
erro := IoResult;
if erro<>0 THEN exit;
{$I-}
blockread(f,header,18,lido
erro := IoResult;
if erro = 0 then
if sign<>'BM' THEN
erro := -100;
IF erro = 0 THEN
BEGIN
desloc := header[8]-4;
if desloc >36 then desloc := 36;
blockread(f,header[10],des
erro := IoResult;
END;
if erro = 0 THEN
begin
reloc := ord(desloc<>8);
larg := header[10];
alt := header[11+reloc];
cores := 1 shl header[13+2*reloc];
if (alt > maxY) OR (larg>maxX) then
erro := -101;
end;
If erro = 0 THEN
BEGIN
if (X<0) OR (Y<0) THEN
Begin
X := (maxX-larg) DIV 2;
Y := (maxY-alt) DIV 2;
End;
blockread(f,rgb_struct,hea
erro := IoResult;
END;
IF erro = 0 THEN
BEGIN
if cores = 16 THEN
begin
larg1 := 8*(larg DIV 8) + 8*ord(larg MOD 8<>0);
LARG1 := LARG1 div 2;
end
else
begin
larg1 := 4*(larg DIV 4) + 4*ord(larg MOD 4<>0);
end;
if reloc = 1 THEN
for i := 0 to cores-1 do
Begin
pal[i].red := rgb_struct[i].r DIV 4;
pal[i].green := rgb_struct[i].g DIV 4;
pal[i].blue := rgb_struct[i].b DIV 4 ;
end
else
for i := 0 to cores-1 do
Begin
pal[i].red := rgb_triple[i].r DIV 4;
pal[i].green := rgb_triple[i].g DIV 4;
pal[i].blue := rgb_triple[i].b DIV 4 ;
end;
EgaDefault;
setallpal16(Pal,0,cores);
bufsize := larg1*(10000 DIV larg1);
lido := bufsize;
While (lido=bufsize) AND (erro=0) do
begin
blockread(f,buf,bufsize,li
erro := IoResult;
if erro= 0 Then
IF Cores = 16 THEN
For j := 1 to lido DIV larg1 do
For i:=0 to larg-1 do
Begin
XP := X+i;
YP := Y+alt-j;
pic_point_1 := buf[(j-1)*larg1+ 1 + i DIV 2];
pic_point_2:=(pic_point_1 SHR 4)*((i+1) MOD 2) +
(pic_point_1 AND 15)*((i+2) MOD 2) ;
putpixel(XP,YP,pic_point_2
End
ELSE
For j := 1 to lido DIV larg1 do
For i:=1 to larg do
Begin
XP := X+(i-1);
YP := Y+alt-j;
pic_point_1 := buf[(j-1)*larg1+i];
putpixel(XP,YP,pic_point_1
end;
Y := Y - lido DIV larg1;
end; { while }
END; { erro = 0 }
close(f);
{$I+}
locer := Ioresult;
If erro = 0 THEN erro := locer;
END;
begin
grDriver := Detect;
InitGraph(grDriver,grMode,
ErrCode := GraphResult;
if ErrCode = grOk then
begin
Load_BMP(-1,0,filename,err
readln;
CloseGraph;
end
else
WriteLn('Graphics error:',
GraphErrorMsg(ErrCode));
end.
This code I have not written myself but found it for u from www.thedigitalfoundry.com/
still I think that if you are trying to use this code then you may like to give me full points
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by: Alisher_NPosted on 2000-03-06 at 05:44:23ID: 2587496
this is not so easy as you suppose - depends on BMP format (number of colors mainly) and desired screen resolution and colors also, do you want it universal or for particular mode ?