;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2010-2015. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; VNC client for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
deflate_callback:
mov eax, [deflate_length]
mov ecx, [esp+8]
mov [ecx], eax
mov eax, [deflate_buffer]
ret 8
encoding_ZRLE:
DEBUGF 2, "ZRLE\n"
@@:
lea eax, [esi+4]
cmp [datapointer], eax
jae @f
call read_data.more
jmp @b
@@:
lodsd
bswap eax ; number of packed bytes
DEBUGF 2, "packed length=%u bytes\n", eax
@@:
push eax
add eax, esi
cmp [datapointer], eax
jae @f
call read_data.more
pop eax
jmp @b
@@:
pop ecx
lea eax, [esi+ecx]
push eax ; end of data ptr
cmp [deflate_buffer], 0 ; first chunk of the stream?
jne @f
lodsw ; load zlib header
cmp ax, 0x9c78 ; default compression?
jne .deflate_fail
sub ecx, 2 ; subtract 2 byte header
; invoke deflate_init
; mov [deflate_str], eax
@@:
sub ecx, 4 ; subtract 4 byte check value trailer
mov [deflate_buffer], esi
mov [deflate_length], ecx
; mov eax, [deflate_str]
push eax ; allocate place on stack
invoke deflate_unpack2, deflate_callback, 0, esp ; unpack the data
pop ecx ; get size in ecx
test eax, eax
jz .deflate_fail
push eax
DEBUGF 2, "%u bytes unpacked succesfully\n", ecx
test ecx, ecx
jz .fail
mov esi, eax
mov [subrectangle.x], 0
mov [subrectangle.y], 0
.tile:
mov eax, [rectangle.width]
sub eax, [subrectangle.x]
cmp eax, 64
jb @f
mov eax, 64
@@:
mov [subrectangle.width], eax
mov edx, [rectangle.height]
sub edx, [subrectangle.y]
cmp edx, 64
jb @f
mov edx, 64
@@:
mov [subrectangle.height], edx
DEBUGF 1, "Subrectangle: x=%u y=%u width=%u height=%u ", \
[subrectangle.x], [subrectangle.y], [subrectangle.width], [subrectangle.height]
; Calculate first pixel pos
mov eax, [rectangle.y]
add eax, [subrectangle.y]
movzx ebx, [screen.width]
mul ebx
add eax, [rectangle.x]
add eax, [subrectangle.x]
lea edi, [framebuffer+eax*3]
; Calculate offset between two rows of pixels
movzx eax, [screen.width]
sub eax, [subrectangle.width]
lea ebp, [eax*3]
mov edx, [subrectangle.height]
;;;;
lodsb ; subencoding type
DEBUGF 1, "encoding=%u\n", al
test al, al
jz .raw
cmp al, 1
je .solid
cmp al, 16
jbe .palette_packed
cmp al, 127
je .reuse_palette
jb .invalid
and al, 0x7f
jz .plain_rle
cmp al, 1
je .prle_reuse_palette
; Palette Run Length Encoded tile
mov [palettesize], al
call create_palette
.prle_reuse_palette:
DEBUGF 1, "Pallete RLE tile\n"
mov eax, 1
.prle_line:
mov ebx, [subrectangle.width]
.prle_pixel:
dec eax
jz .prle_reload
mov word[edi], cx
rol ecx, 16
add edi, 2
mov byte[edi], cl
rol ecx, 16
inc edi
dec ebx
jnz .prle_pixel
add edi, ebp
dec edx
jnz .prle_line
jmp .next_tile
.prle_reload:
;;;
; load palette index and get color from palette
xor eax, eax
lodsb
push ebx
mov bl, al
and al, 0x7f
mov ecx, [palette+eax*4]
; run length follows?
xor eax, eax
test bl, 0x80
pop ebx
jz .plength_ok
;;;
; load runlength
push ebx
xor eax, eax
xor ebx, ebx
@@:
lodsb
cmp al, 255
jne @f
add ebx, eax
jmp @b
@@:
add eax, ebx
pop ebx
.plength_ok:
add eax, 2
jmp .prle_pixel
; Run Length Encoded tile
.plain_rle:
DEBUGF 1, "Plain RLE tile\n"
mov eax, 1
.rle_line:
mov ebx, [subrectangle.width]
.rle_pixel:
dec eax
jz .rle_reload
mov word[edi], cx
rol ecx, 16
add edi, 2
mov byte[edi], cl
rol ecx, 16
inc edi
dec ebx
jnz .rle_pixel
add edi, ebp
dec edx
jnz .rle_line
jmp .next_tile
.rle_reload:
; TODO: check for buffer underrun
; load pixel value
call load_cpixel
mov ecx, eax
; load length
xor eax, eax
push ebx
xor ebx, ebx
@@:
lodsb
cmp al, 255
jne @f
add ebx, eax
jmp @b
@@:
add eax, ebx
add eax, 2
pop ebx
jmp .rle_pixel
.reuse_palette:
cmp [palettesize], 1
jne .reuse_palette_
mov ecx, [palette]
mov eax, ecx
shr eax, 16
jmp .solid_line
; Palette packed tile
.palette_packed:
DEBUGF 1, "Palette packed tile\n"
mov [palettesize], al
call create_palette
.reuse_palette_:
cmp [palettesize], 2
je .palette_1bit
cmp [palettesize], 4
jbe .palette_2bit
jmp .palette_4bit
.palette_1bit:
DEBUGF 1, "1-bit palette\n"
.palette_1bit_line:
mov ebx, [subrectangle.width]
.palette_1bit_byte:
lodsb
rol al, 1
mov ecx, eax
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
mov eax, ecx
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
mov eax, ecx
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
mov eax, ecx
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
mov eax, ecx
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
mov eax, ecx
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
mov eax, ecx
and eax, 0x1
mov eax, [palette+4*eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_1bit_next_line
rol cl, 1
and ecx, 0x1
mov eax, [palette+4*ecx]
stosw
shr eax, 16
stosb
dec ebx
jnz .palette_1bit_byte
.palette_1bit_next_line:
add edi, ebp
dec edx
jnz .palette_1bit_line
jmp .next_tile
.palette_2bit:
DEBUGF 1, "2-bit palette\n"
.palette_2bit_line:
mov ebx, [subrectangle.width]
.palette_2bit_byte:
lodsb
mov ecx, eax
and eax, 0xc0
shr eax, 4
mov eax, [palette+eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_2bit_next_line
mov eax, ecx
and eax, 0x30
shr eax, 2
mov eax, [palette+eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_2bit_next_line
mov eax, ecx
and eax, 0x0c
mov eax, [palette+eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_2bit_next_line
and ecx, 0x03
mov eax, [palette+4*ecx]
stosw
shr eax, 16
stosb
dec ebx
jnz .palette_2bit_byte
.palette_2bit_next_line:
add edi, ebp
dec edx
jnz .palette_2bit_line
jmp .next_tile
.palette_4bit:
DEBUGF 1, "4-bit palette\n"
.palette_4bit_line:
mov ebx, [subrectangle.width]
.palette_4bit_byte:
lodsb
mov cl, al
and eax, 0xf0
shr eax, 2
mov eax, [palette+eax]
stosw
shr eax, 16
stosb
dec ebx
jz .palette_4bit_next_line
and ecx, 0x0f
shl ecx, 2
mov eax, [palette+ecx]
stosw
shr eax, 16
stosb
dec ebx
jnz .palette_4bit_byte
.palette_4bit_next_line:
add edi, ebp
dec edx
jnz .palette_4bit_line
jmp .next_tile
; RAW tile
.raw:
push edx
mov eax, [subrectangle.width]
mul [subrectangle.height]
lea eax, [eax*3]
pop edx
; TODO: check for buffer underrun
DEBUGF 1, "RAW tile\n"
.raw_line:
mov ebx, [subrectangle.width]
.raw_pixel:
call load_cpixel
stosw
shr eax, 16
stosb
dec ebx
jnz .raw_pixel
add edi, ebp
dec edx
jnz .raw_line
jmp .next_tile
; Single color tile
.solid:
DEBUGF 1, "Solid tile\n"
; TODO: check for buffer underrun
call load_cpixel
mov ecx, eax
shr ecx, 16
mov [palettesize], 1
mov [palette], eax
.solid_line:
mov ebx, [subrectangle.width]
.solid_pixel:
stosw
mov [edi], cl
inc edi
dec ebx
jnz .solid_pixel
add edi, ebp
dec edx
jnz .solid_line
; jmp .next_tile
; Go to the next tile
.next_tile:
mov eax, [subrectangle.x]
add eax, 64
cmp eax, [rectangle.width]
jae .next_row
mov [subrectangle.x], eax
jmp .tile
.next_row:
mov [subrectangle.x], 0
mov eax, [subrectangle.y]
add eax, 64
cmp eax, [rectangle.height]
jae .done
mov [subrectangle.y], eax
jmp .tile
.done:
DEBUGF 1, "ZRLE complete!\n"
pop ecx
mcall 68, 13 ; free the unpacked data
pop esi
jmp next_rectangle
.invalid:
DEBUGF 2, "Invalid subencoding type!\n"
.fail:
DEBUGF 2, "ZRLE failed!\n"
pop ecx
mcall 68, 13 ; free unpacked data
pop esi
jmp next_rectangle
.deflate_fail:
DEBUGF 2,"Unpacking failed!\n"
pop esi
jmp next_rectangle