118 lines
1.5 KiB
NASM
118 lines
1.5 KiB
NASM
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.ppm:
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stdcall img.create, [width], [height], Image.bpp24
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test eax, eax
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jz .quit
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mov [retvalue], eax
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mov ebx, eax
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mov edi, [ebx + Image.Data]
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mov ecx, [ebx + Image.Width]
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imul ecx, [ebx + Image.Height]
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cmp [data_type], PNM_ASCII
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je .ppm.ascii
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.ppm.raw:
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cmp [maxval], 0xff
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jne .ppm.raw.scale
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@@:
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lodsw
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xchg al, ah
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movsb
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stosw
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dec ecx
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jnz @b
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jmp .quit
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.ppm.raw.scale:
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mov edx, [maxval]
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xor eax, eax
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@@:
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lodsb
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mov ebx, eax
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shl eax, 8
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sub eax, ebx
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div dl
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stosb
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lodsb
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mov ebx, eax
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shl eax, 8
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sub eax, ebx
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div dl
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stosb
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lodsb
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mov ebx, eax
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shl eax, 8
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sub eax, ebx
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div dl
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stosb
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dec ecx
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jnz @b
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jmp .quit
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.ppm.ascii:
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xor eax, eax
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cmp [maxval], 0xff
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jne .ppm.ascii.scale
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.ppm.ascii.next_char:
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@@:
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lodsb
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cmp al, ' '
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jna @b
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call pnm._.get_number
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mov [edi + 2], bl
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@@:
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lodsb
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cmp al, ' '
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jna @b
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call pnm._.get_number
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mov [edi + 1], bl
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@@:
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lodsb
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cmp al, ' '
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jna @b
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call pnm._.get_number
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mov [edi + 0], bl
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add edi, 3
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dec ecx
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jnz .ppm.ascii.next_char
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jmp .quit
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.ppm.ascii.scale:
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mov edx, [maxval]
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.ppm.ascii.scale.next_char:
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@@:
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lodsb
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cmp al, ' '
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jna @b
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call pnm._.get_number
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mov eax, ebx
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shl eax, 8
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sub eax, ebx
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div dl
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mov [edi + 2], al
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@@:
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lodsb
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cmp al, ' '
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jna @b
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call pnm._.get_number
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mov eax, ebx
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shl eax, 8
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sub eax, ebx
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div dl
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mov [edi + 1], al
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@@:
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lodsb
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cmp al, ' '
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jna @b
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call pnm._.get_number
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mov eax, ebx
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shl eax, 8
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sub eax, ebx
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div dl
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mov [edi + 0], al
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add edi, 3
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dec ecx
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jnz .ppm.ascii.next_char
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jmp .quit
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