| 0,0 → 1,168 |
|---|
| ; 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 |
| |
| %ifdef NASM_STACK_NOEXEC |
| section .note.GNU-stack noalloc noexec nowrite progbits |
| %endif |