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libimg: PCX v3.0 image format support - grayscale and monochrome (through converting to 8bit) decoding

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git-svn-id: svn://kolibrios.org@1572 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Ivan Baravy 2010-08-19 20:22:50 +00:00
parent a74d0205d1
commit 7ea3c78d40
1 changed files with 238 additions and 13 deletions
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251
programs/develop/libraries/libs-dev/libimg/pcx/pcx.asm
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@ -18,7 +18,7 @@
;;================================================================================================;; ;;================================================================================================;;
include 'pcx.inc' include 'pcx.inc'
;include '../../../../system/board/trunk/debug.inc' include '../../../../system/board/trunk/debug.inc'
;;================================================================================================;; ;;================================================================================================;;
proc img.is.pcx _data, _length ;//////////////////////////////////////////////////////////////////;; proc img.is.pcx _data, _length ;//////////////////////////////////////////////////////////////////;;
@ -42,8 +42,8 @@ proc img.is.pcx _data, _length ;////////////////////////////////////////////////
jne .is_not_pcx jne .is_not_pcx
cmp [edi+pcx_header.encoding], 1 cmp [edi+pcx_header.encoding], 1
jne .is_not_pcx jne .is_not_pcx
; cmp [esi+pcx_header.reserved], 1 cmp [esi+pcx_header.reserved], 0
; jne .is_not_pcx jne .is_not_pcx
add edi, pcx_header.filler add edi, pcx_header.filler
xor al, al xor al, al
@ -54,19 +54,9 @@ proc img.is.pcx _data, _length ;////////////////////////////////////////////////
jnz .is_not_pcx jnz .is_not_pcx
.is_pcx: .is_pcx:
;pusha
;dps 'is_pcx'
;newline
;popa
inc eax inc eax
pop edi ecx
ret
.is_not_pcx: .is_not_pcx:
;pusha
;dps 'is_not_pcx'
;newline
;popa
pop edi ecx pop edi ecx
ret ret
@ -93,6 +83,7 @@ ysize rw 1
stxsize rw 1 stxsize rw 1
stysize rw 1 stysize rw 1
total_bpl rd 1 total_bpl rd 1
total_bpl_tmp rd 1
line_begin rd 1 line_begin rd 1
retvalue rd 1 retvalue rd 1
@ -102,6 +93,14 @@ endl
mov esi, [_data] mov esi, [_data]
cmp [esi+pcx_header.bpp], 1
jz monochrome
cmp byte[esi+pcx_header.nplanes], 3
jnz indexed
_24bit:
xor eax, eax xor eax, eax
mov al, byte[esi+pcx_header.nplanes] mov al, byte[esi+pcx_header.nplanes]
mov [nplanes], eax mov [nplanes], eax
@ -196,8 +195,234 @@ endl
popa popa
mov eax, [retvalue] mov eax, [retvalue]
ret ret
indexed:
xor eax, eax
mov al, byte[esi+pcx_header.nplanes]
mov [nplanes], eax
mul word[esi+pcx_header.bpl]
mov [total_bpl], eax
movzx eax, word[esi+pcx_header.xmax]
inc ax
sub ax, word[esi+pcx_header.xmin]
mov [xsize], ax
movzx ebx, word[esi+pcx_header.ymax]
inc bx
sub bx, word[esi+pcx_header.ymin]
mov [ysize], bx
stdcall img.create, eax, ebx, Image.bpp8
mov [retvalue], eax
test eax, eax
jz .quit
mov esi, [_data]
add esi, [_length]
sub esi, 768
mov edi, [eax+Image.Palette]
mov ecx, 256
@@:
mov ebx, [esi]
and ebx, 0x00ffffff
bswap ebx
shr ebx, 8
mov [edi], ebx
add edi, 4
add esi, 3
dec ecx
jnz @b
movzx ebx, [xsize]
movzx ecx, [ysize]
mov edx, [eax+Image.Data]
rol ebx, 16
or ebx, ecx
xor ebx, [edx]
mov [eax+Image.Checksum], ebx
mov esi, [_data]
add esi, 128
mov edi, [retvalue]
mov edi, [edi+Image.Data]
.begin:
mov eax, [_data]
mov ax, word[eax+pcx_header.bpl]
.decode:
mov dl, byte[esi]
inc esi
mov [buf], dl
and dl, 0xC0
cmp dl, 0xC0
jne @f
mov dl, [buf]
and dl, 0x3F
mov dh, [esi]
inc esi
.write_sequence:
mov [edi], dh
inc edi
dec ax
dec dl
jnz .write_sequence
test ax, ax
jz .end_line
jmp .decode
@@:
mov dl, byte[buf]
mov [edi], dl
inc edi
dec ax
jz .end_line
jmp .decode
.end_line:
dec word[ysize]
jz .quit
jmp .begin
.quit:
popa
mov eax, [retvalue]
ret
monochrome:
xor eax, eax
mov ax, word[esi+pcx_header.bpl]
mov [total_bpl], eax
movzx eax, word[esi+pcx_header.xmax]
inc ax
sub ax, word[esi+pcx_header.xmin]
mov [xsize], ax
movzx ebx, word[esi+pcx_header.ymax]
inc bx
sub bx, word[esi+pcx_header.ymin]
mov [ysize], bx
stdcall img.create, eax, ebx, Image.bpp8
mov [retvalue], eax
test eax, eax
jz .quit
mov edi, [eax+Image.Palette]
mov [edi], dword 0x00000000
mov [edi+4], dword 0x00ffffff
movzx ebx, [xsize]
movzx ecx, [ysize]
mov edx, [eax+Image.Data]
rol ebx, 16
or ebx, ecx
xor ebx, [edx]
mov [eax+Image.Checksum], ebx
mov esi, [_data]
add esi, 128
mov edi, [retvalue]
mov edi, [edi+Image.Data]
.begin:
mov eax, [total_bpl]
mov [total_bpl_tmp], eax
mov ax, [xsize]
.decode:
mov dh, byte[esi]
inc esi
mov [buf], dh
and dh, 0xC0
cmp dh, 0xC0
je .cycle1
mov dh, 1
mov dl, [buf]
jmp .exit1
.cycle1:
mov dh, [buf]
and dh, 0x3F
mov dl, byte[esi]
inc esi
.exit1:
push eax
xor eax, eax
mov al, dh
sub [total_bpl_tmp], eax
pop eax
.write_sequence:
mov ecx, 7
.go:
bt edx, ecx
jnc @f
mov [edi], byte 0x01
jmp .later
@@:
mov [edi], byte 0x00
.later:
inc edi
dec ax
jnz .lol
@@:
cmp [total_bpl_tmp], 0
jng @f
mov dh, byte[esi]
inc esi
mov [buf], dh
and dh, 0xC0
cmp dh, 0xC0
je .cycle2
mov dh, 1
mov dl, [buf]
jmp .exit2
.cycle2:
mov dh, [buf]
and dh, 0x3F
mov dl, byte[esi]
inc esi
.exit2:
push eax
xor eax, eax
mov al, dh
sub [total_bpl_tmp], eax
pop eax
jmp @b
@@:
dec word[ysize]
jnz .begin
jmp .quit
.lol:
dec ecx
cmp ecx, -1
jne .go
dec dh
jnz .write_sequence
jmp .decode
.quit:
popa
mov eax, [retvalue]
ret
endp endp
;;================================================================================================;; ;;================================================================================================;;
proc img.encode.pcx _img, _p_length, _options ;///////////////////////////////////////////////////;; proc img.encode.pcx _img, _p_length, _options ;///////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;; ;;------------------------------------------------------------------------------------------------;;