106 lines
1.9 KiB
NASM
106 lines
1.9 KiB
NASM
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model tiny,stdcall
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p586N
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locals
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jumps
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codeseg
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option procalign:byte
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include "..\include\mem.h"
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include "..\include\divers.h"
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include "..\include\bmp.h"
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org 0h
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start:
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header exe <"CE",1,0,0,offset exports,offset imports,,>
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exporting
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declare showbmp
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declare loadbmppalet
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ende
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importing
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use VIDEO,showpixel
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endi
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;==========SHOWBMP=========
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;Affiche le BMP point<6E>e par DS:%0 en %1, %2
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;<- DS:%0 BMP, %1 coordonn<6E>es X, %2 coordonn<6E>es Y
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;->
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;==========================
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PROC showbmp FAR
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ARG @pointer:word, @x:word, @y:word
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USES ax,bx,cx,dx,si,di
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mov si,[@pointer]
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cmp [word ptr (bmp_file si).bmp_filetype],"MB"
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jne @@errorshowing
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mov edi,[(bmp_file si).bmp_bitmapoffset]
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add di,400h
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add di,si
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xor ebx,ebx
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mov ecx,[(bmp_file si).bmp_height]
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mov edx,[(bmp_file si).bmp_width]
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;and dx,11111100b
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cmp edx,[(bmp_file si).bmp_width]
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;jae @@noadjust
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;add dx,4
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@@noadjust:
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sub edx,[(bmp_file si).bmp_width]
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@@bouclette:
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push bx cx
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add bx,[@x]
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add cx,[@y]
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call [cs:showpixel],bx,cx,[word ptr di]
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pop cx bx
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inc bx
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inc di
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cmp ebx,[(bmp_file si).bmp_width]
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jb @@bouclette
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xor bx,bx
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;add di,dx
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dec cx
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cmp cx,0
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jne @@bouclette
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clc
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ret
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@@errorshowing:
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stc
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ret
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ENDP showbmp
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;==========LOADBMPPALET=========
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;Charge la palette du BMP point<6E>e par DS:%0
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;-> DS:%0 BMP
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;<-
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;===============================
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PROC loadbmppalet FAR
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ARG @pointer:word
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USES ax,bx,cx,dx,si
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mov si,[@pointer]
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mov bx,0400h+36h-4
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mov cx,100h
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mov dx, 3c8h
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@@paletteload:
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mov al, cl
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dec al
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out dx, al
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inc dx
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mov al,[bx+si+2]
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shr al,2
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out dx, al
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mov al,[bx+si+1]
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shr al,2
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out dx, al
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mov al,[bx+si]
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shr al,2
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out dx, al
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sub bx,4
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dec dx
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dec cl
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jnz @@paletteload
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ret
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ENDP loadbmppalet
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