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; CTV!
bits 32
section .text
;extern "C" int blur_bitmap_16
; (unsigned char *dest,int len);
global _blur_bitmap_16
global _test_ctv
times ($$-$) & 3 db 0
_blur_bitmap_16:
push edi ; point to screen
push edx ; temporary for unwrapping
push ecx ; count
push ebx ; last pixel
; ax = current pixel
xor ebx,ebx ; Last pixel
mov edi,[esp+20] ; edi is a pointer to the bitmap
mov ecx,[esp+24] ; ecx is the amount of pixels to blur
blur16_loop:
mov ax,word[edi]
mov dx,ax
and ax,0x07e0
and dx,0xf81f
rol eax,16
mov ax,dx
; Now we have unwrapped the green middle out of eax
mov edx,eax ; ebx=this pixel (unwrapped) before we changed it
add eax,ebx ; add last pixel to this one
mov ebx,edx ; ebx=this pixel for next time
sar eax,1
; wrap up again
mov edx,eax
ror edx,16
and dx,0x07e0
and ax,0xf81f
or ax,dx
;finished pixel in ax
;mov word[edi],ax
;add edi,2
stosw
loop blur16_loop
pop ebx
pop ecx
pop edx
pop edi
xor eax,eax
ret
; --------------------------------------
bits 32
section .text
;extern "C" int blur_bitmap_15
; (unsigned char *dest,int len);
global _blur_bitmap_15
times ($$-$) & 3 db 0
_blur_bitmap_15:
push edi ; point to screen
push edx ; temporary for unwrapping
push ecx ; count
push ebx ; last pixel
; ax = current pixel
xor ebx,ebx ; Last pixel
mov edi,[esp+20] ; edi is a pointer to the bitmap
mov ecx,[esp+24] ; ecx is the amount of pixels to blur
blur15_loop:
mov ax,word[edi]
mov dx,ax
and ax,0x03e0
and dx,0x7c1f
rol eax,16
mov ax,dx
; Now we have unwrapped the green middle out of eax
mov edx,eax ; ebx=this pixel (unwrapped) before we changed it
add eax,ebx ; add last pixel to this one
mov ebx,edx ; ebx=this pixel for next time
sar eax,1
; wrap up again
mov edx,eax
ror edx,16
and dx,0x03e0
and ax,0x7c1f
or ax,dx
;finished pixel in ax
;mov word[edi],ax
;add edi,2
stosw
loop blur15_loop
pop ebx
pop ecx
pop edx
pop edi
xor eax,eax
ret
; ----------------------------
bits 32
section .text
;extern "C" int test_ctv
; (unsigned char *dest,int len);
global _test_ctv
times ($$-$) & 3 db 0
_test_ctv:
push edi ; point to screen
push edx ; temporary for unwrapping
push ecx ; count
push ebx ; last pixel
; ax = current pixel
xor ebx,ebx ; Last pixel
mov edi,[esp+20] ; edi is a pointer to the bitmap
mov ecx,[esp+24] ; ecx is the amount of pixels to blur
test_loop:
mov ax,word[edi]
mov dx,ax
rol eax,16
mov ax,dx
mov edx,eax ; ebx=this pixel (unwrapped) before we changed it
mov ebx,edx ; ebx=this pixel for next time
sar eax,1
mov edx,eax
ror edx,16
;finished pixel in ax
;mov word[edi],ax
;add edi,2
stosw
loop test_loop
pop ebx
pop ecx
pop edx
pop edi
xor eax,eax
ret
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