;;================================================================================================;;
;;//// libimg.asm //// (c) mike.dld, 2007-2008, (c) diamond, 2009, (c) dunkaist, 2011-2013 ///////;;
;;================================================================================================;;
;; ;;
;; This file is part of Common development libraries (Libs-Dev). ;;
;; ;;
;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;
;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;
;; of the License, or (at your option) any later version. ;;
;; ;;
;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;;
;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;;
;; Lesser General Public License for more details. ;;
;; ;;
;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;;
;; If not, see . ;;
;; ;;
;;================================================================================================;;
format MS COFF
public @EXPORT as 'EXPORTS'
include 'struct.inc'
include 'proc32.inc'
include 'macros.inc'
include 'config.inc'
include 'debug-fdo.inc'
__DEBUG__ = 0
__DEBUG_LEVEL__ = 1
include 'libio.inc'
purge section,mov,add,sub
include 'libimg.inc'
section '.flat' code readable align 16
include 'bmp/bmp.asm'
include 'gif/gif.asm'
include 'jpeg/jpeg.asm'
include 'png/png.asm'
include 'tga/tga.asm'
include 'z80/z80.asm'
include 'ico_cur/ico_cur.asm'
include 'pcx/pcx.asm'
include 'xcf/xcf.asm'
include 'tiff/tiff.asm'
include 'pnm/pnm.asm'
include 'wbmp/wbmp.asm'
include 'xbm/xbm.asm'
include 'scale.asm'
include 'convert.asm'
COMPOSITE_MODE equ MMX
; MMX | pretty fast and compatible
; SSE | a bit faster, but may be unsupported by some CPUs
include 'blend.asm'
;;================================================================================================;;
proc lib_init ;///////////////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Library entry point (called after library load) ;;
;;------------------------------------------------------------------------------------------------;;
;> eax = pointer to memory allocation routine ;;
;> ebx = pointer to memory freeing routine ;;
;> ecx = pointer to memory reallocation routine ;;
;> edx = pointer to library loading routine ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 1 (fail) / 0 (ok) (library initialization result) ;;
;;================================================================================================;;
mov [mem.alloc], eax
mov [mem.free], ebx
mov [mem.realloc], ecx
mov [dll.load], edx
or edx,edx
jz @f
invoke dll.load, @IMPORT
@@:
call img.initialize.jpeg
xor eax, eax
cpuid
cmp ecx, 'ntel'
jnz @f
mov dword [img._.do_rgb.handlers + (Image.bpp15-1)*4], img._.do_rgb.bpp15.intel
mov dword [img._.do_rgb.handlers + (Image.bpp16-1)*4], img._.do_rgb.bpp16.intel
@@:
.ok: xor eax,eax
ret
endp
;;================================================================================================;;
proc img.is_img _data, _length ;//////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
push ebx
mov ebx, img.formats_table
@@: stdcall [ebx + FormatsTableEntry.Is], [_data], [_length]
or eax, eax
jnz @f
add ebx, sizeof.FormatsTableEntry
cmp dword[ebx], 0
jnz @b
xor eax, eax
@@: pop ebx
ret
endp
;;================================================================================================;;
proc img.info _data, _length ;////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img.from_file _filename ;////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? load file from disk and decode it ;;
;;------------------------------------------------------------------------------------------------;;
;> [_filename] = file name as passed to libio ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to image ;;
;;================================================================================================;;
locals
fd dd ?
img_data_len dd ?
img_data dd ? ; raw bytes
img dd ? ; Image pointer
endl
push ebx
mov [img], 0
invoke file.open, [_filename], O_READ
mov [fd], eax
test eax, eax
jz .exit
invoke file.size, [_filename]
test eax, eax
jnz .exit_close
mov [img_data_len], ebx
invoke mem.alloc, ebx
test eax, eax
jz .exit_close
mov [img_data], eax
invoke file.read, [fd], eax, [img_data_len]
cmp eax, -1
jz .exit_free_close
cmp eax, [img_data_len]
jnz .exit_free_close
stdcall img.decode, [img_data], [img_data_len], 0
test eax, eax
jz .exit_free_close
mov [img], eax
.exit_free_close:
invoke mem.free, [img_data]
.exit_close:
invoke file.close, [fd]
mov eax, [img]
.exit:
pop ebx
ret
endp
;;================================================================================================;;
proc img.to_file _img, _filename ;////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img.from_rgb _rgb_data ;/////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to image ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img.to_rgb2 _img, _out ;/////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? decodes image data into RGB triplets and stores them where [_out] points to ;;
;;------------------------------------------------------------------------------------------------;;
;> [_img] = pointer to source image ;;
;> [_out] = where to store RGB triplets ;;
;;------------------------------------------------------------------------------------------------;;
;< none ;;
;;================================================================================================;;
push esi edi
mov esi, [_img]
stdcall img._.validate, esi
or eax, eax
jnz .ret
mov edi, [_out]
call img._.do_rgb
.ret:
pop edi esi
ret
endp
;;================================================================================================;;
proc img.to_rgb _img ;////////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? decodes image data into RGB triplets and returns pointer to memory area of following structure:;;
;? width dd ? ;;
;? height dd ? ;;
;? rgb triplets ;;
;;------------------------------------------------------------------------------------------------;;
;> [_img] = pointer to source image ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to rgb_data (array of [rgb] triplets) ;;
;;================================================================================================;;
push esi edi
mov esi, [_img]
stdcall img._.validate, esi
or eax, eax
jnz .error
mov esi, [_img]
mov ecx, [esi + Image.Width]
imul ecx, [esi + Image.Height]
lea eax, [ecx * 3 + 4 * 3]
invoke mem.alloc, eax
or eax, eax
jz .error
mov edi, eax
push eax
mov eax, [esi + Image.Width]
stosd
mov eax, [esi + Image.Height]
stosd
call img._.do_rgb
pop eax
pop edi esi
ret
.error:
xor eax, eax
pop edi esi
ret
endp
;;================================================================================================;;
proc img._.do_rgb ;///////////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? decodes [esi + Image.Data] data into RGB triplets and stores them at [edi] ;;
;;------------------------------------------------------------------------------------------------;;
;> esi = pointer to source image ;;
;> edi = pointer to memory to store RGB triplets ;;
;;------------------------------------------------------------------------------------------------;;
;< none ;;
;;================================================================================================;;
mov ecx, [esi + Image.Width]
imul ecx, [esi + Image.Height]
mov eax, [esi + Image.Type]
jmp dword [.handlers + (eax-1)*4]
align 16
.bpp8i:
; 8 BPP WITH PALETTE -> 24 BPP
push ebx
mov ebx, [esi + Image.Palette]
mov esi, [esi + Image.Data]
sub ecx, 1
jz .bpp8i.last
@@:
movzx eax, byte [esi]
add esi, 1
mov eax, [ebx + eax*4]
mov [edi], eax
add edi, 3
sub ecx, 1
jnz @b
.bpp8i.last:
movzx eax, byte [esi]
mov eax, [ebx + eax*4]
mov [edi], ax
shr eax, 16
mov [edi+2], al
pop ebx
ret
align 16
.bpp8g:
; 8 BPP GRAYSCALE -> 24 BPP
mov esi, [esi + Image.Data]
@@:
lodsb
mov ah, al
stosb
stosw
dec ecx
jnz @b
ret
;
;align 16
;.bpp8a: ; considered application layer, may be changed in the future
;; 8a BPP -> 24 BPP
; mov esi, [esi + Image.Data]
;@@:
; lodsw
; mov ah, al
; stosb
; stosw
; dec ecx
; jnz @b
; ret
; 15 BPP -> 24 BPP
.bpp15.intel:
push ebx ebp
sub ecx, 4
jb .bpp15.tail
align 16
.bpp15.intel.loop:
repeat 2
mov ebx, [esi]
mov al, [esi]
mov ah, [esi+1]
add esi, 4
and al, 0x1F
and ah, 0x1F shl 2
mov ebp, ebx
mov dl, al
mov dh, ah
shr al, 2
shr ah, 4
shl dl, 3
shl dh, 1
and ebp, 0x1F shl 5
add al, dl
add ah, dh
shr ebp, 2
mov [edi], al
mov [edi+2], ah
mov eax, ebx
mov ebx, ebp
shr eax, 16
shr ebx, 5
add ebx, ebp
mov ebp, eax
mov [edi+1], bl
and eax, (0x1F) or (0x1F shl 10)
and ebp, 0x1F shl 5
lea edx, [eax+eax]
shr al, 2
mov ebx, ebp
shr ah, 4
shl dl, 2
shr ebx, 2
shr ebp, 7
add al, dl
add ah, dh
mov [edi+3], al
add ebx, ebp
mov [edi+5], ah
mov [edi+4], bl
add edi, 6
end repeat
sub ecx, 4
jnb .bpp15.intel.loop
.bpp15.tail:
add ecx, 4
jz .bpp15.done
@@:
movzx eax, word [esi]
mov ebx, eax
add esi, 2
and eax, (0x1F) or (0x1F shl 10)
and ebx, 0x1F shl 5
lea edx, [eax+eax]
shr al, 2
mov ebp, ebx
shr ebx, 2
shr ah, 4
shl dl, 2
shr ebp, 7
add eax, edx
add ebx, ebp
mov [edi], al
mov [edi+1], bl
mov [edi+2], ah
add edi, 3
sub ecx, 1
jnz @b
.bpp15.done:
pop ebp ebx
ret
.bpp15.amd:
push ebx ebp
sub ecx, 4
jb .bpp15.tail
align 16
.bpp15.amd.loop:
repeat 4
if (% mod 2) = 1
mov eax, dword [esi]
mov ebx, dword [esi]
else
movzx eax, word [esi]
mov ebx, eax
end if
add esi, 2
and eax, (0x1F) or (0x1F shl 10)
and ebx, 0x1F shl 5
lea edx, [eax+eax]
shr al, 2
mov ebp, ebx
shr ebx, 2
shr ah, 4
shl dl, 2
shr ebp, 7
add eax, edx
add ebx, ebp
mov [edi], al
mov [edi+1], bl
mov [edi+2], ah
add edi, 3
end repeat
sub ecx, 4
jnb .bpp15.amd.loop
jmp .bpp15.tail
; 16 BPP -> 24 BPP
.bpp16.intel:
push ebx ebp
sub ecx, 4
jb .bpp16.tail
align 16
.bpp16.intel.loop:
repeat 2
mov ebx, [esi]
mov al, [esi]
mov ah, [esi+1]
add esi, 4
and al, 0x1F
and ah, 0x1F shl 3
mov ebp, ebx
mov dl, al
mov dh, ah
shr al, 2
shr ah, 5
shl dl, 3
and ebp, 0x3F shl 5
add al, dl
add ah, dh
shr ebp, 3
mov [edi], al
mov [edi+2], ah
mov eax, ebx
mov ebx, ebp
shr eax, 16
shr ebx, 6
add ebx, ebp
mov ebp, eax
mov [edi+1], bl
and eax, (0x1F) or (0x1F shl 11)
and ebp, 0x3F shl 5
mov edx, eax
shr al, 2
mov ebx, ebp
shr ah, 5
shl dl, 3
shr ebx, 3
shr ebp, 9
add al, dl
add ah, dh
mov [edi+3], al
add ebx, ebp
mov [edi+5], ah
mov [edi+4], bl
add edi, 6
end repeat
sub ecx, 4
jnb .bpp16.intel.loop
.bpp16.tail:
add ecx, 4
jz .bpp16.done
@@:
movzx eax, word [esi]
mov ebx, eax
add esi, 2
and eax, (0x1F) or (0x1F shl 11)
and ebx, 0x3F shl 5
mov edx, eax
shr al, 2
mov ebp, ebx
shr ebx, 3
shr ah, 5
shl dl, 3
shr ebp, 9
add eax, edx
add ebx, ebp
mov [edi], al
mov [edi+1], bl
mov [edi+2], ah
add edi, 3
sub ecx, 1
jnz @b
.bpp16.done:
pop ebp ebx
ret
.bpp16.amd:
push ebx ebp
sub ecx, 4
jb .bpp16.tail
align 16
.bpp16.amd.loop:
repeat 4
if (% mod 2) = 1
mov eax, dword [esi]
mov ebx, dword [esi]
else
movzx eax, word [esi]
mov ebx, eax
end if
add esi, 2
and eax, (0x1F) or (0x1F shl 11)
and ebx, 0x3F shl 5
mov edx, eax
shr al, 2
mov ebp, ebx
shr ebx, 3
shr ah, 5
shl dl, 3
shr ebp, 9
add eax, edx
add ebx, ebp
mov [edi], al
mov [edi+1], bl
mov [edi+2], ah
add edi, 3
end repeat
sub ecx, 4
jnb .bpp16.amd.loop
jmp .bpp16.tail
align 16
.bpp24:
; 24 BPP -> 24 BPP
lea ecx, [ecx*3 + 3]
mov esi, [esi + Image.Data]
shr ecx, 2
rep movsd
ret
align 16
.bpp32:
; 32 BPP -> 24 BPP
mov esi, [esi + Image.Data]
@@:
mov eax, [esi]
mov [edi], ax
shr eax, 16
mov [edi+2], al
add esi, 4
add edi, 3
sub ecx, 1
jnz @b
@@:
ret
align 16
.bpp1:
push ebx ebp
mov ebp, [esi + Image.Width]
mov edx, [esi + Image.Height]
shl edx, 16
mov ebx, [esi + Image.Palette]
mov esi, [esi + Image.Data]
.bpp1.pre:
mov dx, bp
mov ecx, 7
.bpp1.begin:
xor eax, eax
bt [esi], ecx
adc eax, 0
mov eax, [ebx + eax*4]
mov [edi], ax
shr eax, 16
mov [edi + 2], al
add edi, 3
dec dx
jz .bpp1.end_line
dec ecx
jns .bpp1.begin
mov ecx, 7
inc esi
jmp .bpp1.begin
.bpp1.end_line:
sub edx, 0x10000
jz .bpp1.quit
inc esi
jmp .bpp1.pre
.bpp1.quit:
pop ebp ebx
ret
align 16
.bpp2i:
push ebx ebp
mov ebp, [esi + Image.Width]
mov edx, [esi + Image.Height]
shl edx, 16
mov ebx, [esi + Image.Palette]
mov esi, [esi + Image.Data]
.bpp2i.pre:
mov dx, bp
mov ecx, 3
.bpp2i.begin:
mov eax, 3
shl ecx, 1
shl eax, cl
and al, [esi]
shr eax, cl
shr ecx, 1
mov eax, [ebx + eax*4]
mov [edi], ax
shr eax, 16
mov [edi + 2], al
add edi, 3
dec dx
jz .bpp2i.end_line
dec ecx
jns .bpp2i.begin
mov ecx, 3
inc esi
jmp .bpp2i.begin
.bpp2i.end_line:
sub edx, 0x10000
jz .bpp2i.quit
inc esi
jmp .bpp2i.pre
.bpp2i.quit:
pop ebp ebx
ret
align 16
.bpp4i:
push ebx ebp
mov ebp, [esi + Image.Width]
mov edx, [esi + Image.Height]
shl edx, 16
mov ebx, [esi + Image.Palette]
mov esi, [esi + Image.Data]
.bpp4i.pre:
mov dx, bp
mov ecx, 1
.bpp4i.begin:
mov eax, 15
shl ecx, 2
shl eax, cl
and al, [esi]
shr eax, cl
shr ecx, 2
mov eax, [ebx + eax*4]
mov [edi], ax
shr eax, 16
mov [edi + 2], al
add edi, 3
dec dx
jz .bpp4i.end_line
dec ecx
jns .bpp4i.begin
mov ecx, 1
inc esi
jmp .bpp4i.begin
.bpp4i.end_line:
sub edx, 0x10000
jz .bpp4i.quit
inc esi
jmp .bpp4i.pre
.bpp4i.quit:
pop ebp ebx
ret
endp
;;================================================================================================;;
proc img.decode _data, _length, _options ;////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? decodes loaded into memory graphic file ;;
;;------------------------------------------------------------------------------------------------;;
;> [_data] = pointer to file in memory ;;
;> [_length] = size in bytes of memory area pointed to by [_data] ;;
;> [_options] = 0 / pointer to the structure of additional options ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to image ;;
;;================================================================================================;;
push ebx
mov ebx, [_length]
or ebx,ebx
jz .fail
mov ebx, img.formats_table
@@: stdcall [ebx + FormatsTableEntry.Is], [_data], [_length]
or eax, eax
jnz @f
add ebx, sizeof.FormatsTableEntry
cmp dword[ebx], eax ;0
jnz @b
.fail:
xor eax, eax
pop ebx
ret
@@: mov eax, [ebx + FormatsTableEntry.Decode]
pop ebx
leave
jmp eax
endp
;;================================================================================================;;
proc img.encode uses ebx, _img, _common, _specific ;////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? encode image to some format ;;
;;------------------------------------------------------------------------------------------------;;
;> [_img] = pointer to input image ;;
;> [_common] = some most important/common options ;;
; 0x00 : byte : format id (defined in libimg.inc) ;;
; 0x01 : byte : fast encoding (0) / best compression ratio (255) ;;
; 0 : store uncompressed data (if supported both by the format and libimg) ;;
; 1 - 255 : use compression, if supported ;;
; this option may be ignored if any format specific options are defined ;;
; i.e. 0 here will be ignored if particular compression algorithm is specified ;;
; 0x02 : byte : flags (bitfield) ;;
; 0x01 : return an error if format specific conditions cannot be met ;;
; 0x02 : preserve current bit depth. means 8bpp/16bpp/24bpp and so on ;;
; 0x04 : delete alpha channel, if any ;;
; 0x08 : flush alpha channel with 0xff, if any; add it if none ;;
; 0x03 : byte : reserved, must be 0 ;;
;> [_specific] = 0 / pointer to the structure of format specific options ;;
; see .inc for description ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to encoded data ;;
;< ecx = error code / the size of encoded data ;;
; 1 : out of memory ;;
; 2 : format is not supported ;;
; 3 : specific conditions cannot be satisfied ;;
; 4 : bit depth cannot be preserved ;;
;;================================================================================================;;
mov ebx, [_img]
movzx eax, byte[_common]
dec eax
imul eax, sizeof.FormatsTableEntry
add eax, FormatsTableEntry.Capabilities
add eax, img.formats_table
mov eax, [eax]
test eax, 1 ; is encoding to this format supported at all?
jnz @f
mov ecx, LIBIMG_ERROR_FORMAT
jmp .error
@@:
mov ecx, [ebx + Image.Type]
mov edx, 1
shl edx, cl
test eax, edx
jnz .bit_depth_ok
test byte[_common+2], LIBIMG_ENCODE_STRICT_BIT_DEPTH
jz @f
mov ecx, LIBIMG_ERROR_BIT_DEPTH
jmp .error
@@:
mov edx, 1 SHL Image.bpp24
test eax, edx
jnz @f
mov ecx, LIBIMG_ERROR_BIT_DEPTH
jmp .error
@@:
stdcall img.create, [ebx + Image.Width], [ebx + Image.Height], Image.bpp24
test eax, eax
jnz @f
mov ecx, LIBIMG_ERROR_OUT_OF_MEMORY
jmp .error
@@:
push eax
stdcall img.to_rgb2, ebx, [eax + Image.Data]
pop ebx
.bit_depth_ok:
movzx eax, byte[_common]
dec eax
imul eax, sizeof.FormatsTableEntry
add eax, FormatsTableEntry.Encode
add eax, img.formats_table
mov eax, [eax]
stdcall eax, [_img], [_common], [_specific]
push eax ecx
cmp ebx, [_img]
je @f
stdcall img.destroy, ebx
@@:
pop ecx eax
jmp .quit
.error:
xor eax, eax
.quit:
ret
endp
;;================================================================================================;;
proc img.create _width, _height, _type ;//////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? creates an Image structure and initializes some its fields ;;
;;------------------------------------------------------------------------------------------------;;
;> [_width] = width of an image in pixels ;;
;> [_height] = height of an image in pixels ;;
;> [_type] = one of the Image.bppN constants from libimg.inc ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to image ;;
;;================================================================================================;;
push ecx
stdcall img._.new
or eax, eax
jz .error
mov ecx, [_type]
mov [eax + Image.Type], ecx
push eax
stdcall img.resize_data, eax, [_width], [_height]
or eax, eax
jz .error.2
pop eax
jmp .ret
.error.2:
; pop eax
stdcall img._.delete; eax
xor eax, eax
.error:
.ret:
pop ecx
ret
endp
;;================================================================================================;;
proc img.destroy.layer _img ;/////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? frees memory occupied by an image and all the memory regions its fields point to ;;
;? for image sequences deletes only one frame and fixes Previous/Next pointers ;;
;;------------------------------------------------------------------------------------------------;;
;> [_img] = pointer to image ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 (fail) / 1 (success) ;;
;;================================================================================================;;
mov eax, [_img]
mov edx, [eax + Image.Previous]
test edx, edx
jz @f
push [eax + Image.Next]
pop [edx + Image.Next]
@@:
mov edx, [eax + Image.Next]
test edx, edx
jz @f
push [eax + Image.Previous]
pop [edx + Image.Previous]
@@:
stdcall img._.delete, eax
ret
endp
;;================================================================================================;;
proc img.destroy _img ;///////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? frees memory occupied by an image and all the memory regions its fields point to ;;
;? follows Previous/Next pointers and deletes all the images in sequence ;;
;;------------------------------------------------------------------------------------------------;;
;> [_img] = pointer to image ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 (fail) / 1 (success) ;;
;;================================================================================================;;
push 1
mov eax, [_img]
mov eax, [eax + Image.Previous]
.destroy_prev_loop:
test eax, eax
jz .destroy_prev_done
pushd [eax + Image.Previous]
stdcall img._.delete, eax
test eax, eax
jnz @f
mov byte [esp+4], 0
@@:
pop eax
jmp .destroy_prev_loop
.destroy_prev_done:
mov eax, [_img]
.destroy_next_loop:
pushd [eax + Image.Next]
stdcall img._.delete, eax
test eax, eax
jnz @f
mov byte [esp+4], 0
@@:
pop eax
test eax, eax
jnz .destroy_next_loop
pop eax
ret
endp
;;================================================================================================;;
proc img.count _img ;/////////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Get number of images in the list (e.g. in animated GIF file) ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = -1 (fail) / >0 (ok) ;;
;;================================================================================================;;
push ecx edx
mov edx, [_img]
stdcall img._.validate, edx
or eax, eax
jnz .error
@@: mov eax, [edx + Image.Previous]
or eax, eax
jz @f
mov edx, eax
jmp @b
@@: xor ecx, ecx
@@: inc ecx
mov eax, [edx + Image.Next]
or eax, eax
jz .exit
mov edx, eax
jmp @b
.exit:
mov eax, ecx
pop edx ecx
ret
.error:
or eax, -1
pop edx ecx
ret
endp
;;//// image processing //////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
proc img.lock_bits _img, _start_line, _end_line ;/////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to bits ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img.unlock_bits _img, _lock ;////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img.flip.layer _img, _flip_kind ;////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Flip image layer ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;> _flip_kind = one of FLIP_* constants ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
locals
scanline_len dd ?
endl
push ebx esi edi
mov ebx, [_img]
stdcall img._.validate, ebx
or eax, eax
jnz .error
mov ecx, [ebx + Image.Height]
mov eax, [ebx + Image.Width]
call img._.get_scanline_len
mov [scanline_len], eax
test [_flip_kind], FLIP_VERTICAL
jz .dont_flip_vert
imul eax, ecx
sub eax, [scanline_len]
shr ecx, 1
mov esi, [ebx + Image.Data]
lea edi, [esi + eax]
.next_line_vert:
push ecx
mov ecx, [scanline_len]
push ecx
shr ecx, 2
@@:
dec ecx
js @f
mov eax, [esi]
xchg eax, [edi]
mov [esi], eax
add esi, 4
add edi, 4
jmp @b
@@:
pop ecx
and ecx, 3
jz .cont_line_vert
@@:
mov al, [esi]
xchg al, [edi]
mov [esi], al
add esi, 1
add edi, 1
dec ecx
jnz @b
.cont_line_vert:
pop ecx
mov eax, [scanline_len]
shl eax, 1
sub edi, eax
dec ecx
jnz .next_line_vert
.dont_flip_vert:
test [_flip_kind], FLIP_HORIZONTAL
jz .exit
mov ecx, [ebx + Image.Height]
mov eax, [ebx + Image.Type]
mov esi, [ebx + Image.Data]
mov edi, [scanline_len]
add edi, esi
jmp dword [.handlers_horz + (eax-1)*4]
.bpp32_horz:
sub edi, 4
.next_line_horz:
push ecx esi edi
mov ecx, [scanline_len]
shr ecx, 3
@@: mov eax, [esi]
xchg eax, [edi]
mov [esi], eax
add esi, 4
add edi, -4
sub ecx, 1
jnz @b
pop edi esi ecx
add esi, [scanline_len]
add edi, [scanline_len]
dec ecx
jnz .next_line_horz
jmp .exit
.bpp1x_horz:
sub edi, 2
.next_line_horz1x:
push ecx esi edi
mov ecx, [ebx + Image.Width]
@@: mov ax, [esi]
mov dx, [edi]
mov [edi], ax
mov [esi], dx
add esi, 2
sub edi, 2
sub ecx, 2
ja @b
pop edi esi ecx
add esi, [scanline_len]
add edi, [scanline_len]
dec ecx
jnz .next_line_horz1x
jmp .exit
.bpp8ig_horz:
dec edi
.next_line_horz8ig:
push ecx esi edi
mov ecx, [scanline_len]
shr ecx, 1
@@: mov al, [esi]
mov dl, [edi]
mov [edi], al
mov [esi], dl
add esi, 1
sub edi, 1
sub ecx, 1
jnz @b
pop edi esi ecx
add esi, [scanline_len]
add edi, [scanline_len]
dec ecx
jnz .next_line_horz8ig
jmp .exit
.bpp24_horz:
sub edi, 3
.next_line_horz24:
push ecx esi edi
mov ecx, [ebx + Image.Width]
@@:
mov al, [esi]
mov dl, [edi]
mov [edi], al
mov [esi], dl
mov al, [esi+1]
mov dl, [edi+1]
mov [edi+1], al
mov [esi+1], dl
mov al, [esi+2]
mov dl, [edi+2]
mov [edi+2], al
mov [esi+2], dl
add esi, 3
sub edi, 3
sub ecx, 2
ja @b
pop edi esi ecx
add esi, [scanline_len]
add edi, [scanline_len]
dec ecx
jnz .next_line_horz24
jmp .exit
.bpp1_horz:
mov edi, [scanline_len]
mov edx, [ebx + Image.Width]
and edx, 7
neg edx
add edx, 8
and edx, 7
.bpp1_horz.begin:
push ebx edx esi
mov eax, 7
add edi, esi
sub edi, 1
mov ebx, [ebx + Image.Width]
shr ebx, 1
.bpp1_horz.bit:
bt [edi], edx
jc @f
btr [esi], eax
jmp .bpp1_horz.right
@@:
bts [esi], eax
.bpp1_horz.right:
jnc @f
bts [edi], edx
jmp .bpp1_horz.bit_done
@@:
btr [edi], edx
.bpp1_horz.bit_done:
inc edx
and edx, 7
jnz @f
dec edi
@@:
dec eax
jns @f
mov eax, 7
inc esi
@@:
dec ebx
jnz .bpp1_horz.bit
pop esi edx ebx
add esi, [scanline_len]
mov edi, [scanline_len]
dec ecx
jnz .bpp1_horz.begin
jmp .exit
.bpp2i_horz:
mov edi, [scanline_len]
mov edx, [ebx + Image.Width]
and edx, 3
neg edx
add edx, 4
and edx, 3
.bpp2i_horz.begin:
push ebx edx esi
mov eax, 3
add edi, esi
sub edi, 1
mov ebx, [ebx + Image.Width]
shr ebx, 1
.bpp2i_horz.pixel:
push ebx ecx
mov ebx, 3
mov ecx, edx
shl ebx, cl
shl ebx, cl
and bl, [edi]
shr ebx, cl
shr ebx, cl
mov bh, 3
mov ecx, eax
shl ebx, cl
shl ebx, cl
not bh
and bh, [esi]
or bl, bh
mov bh, [esi]
mov [esi], bl
shr ebx, 8
shr ebx, cl
shr ebx, cl
and ebx, 3
mov bh, 3
mov ecx, edx
shl ebx, cl
shl ebx, cl
not bh
and bh, [edi]
or bl, bh
mov [edi], bl
pop ecx ebx
.bpp2i_horz.pixel_done:
inc edx
and edx, 3
jnz @f
dec edi
@@:
dec eax
jns @f
mov eax, 3
inc esi
@@:
dec ebx
jnz .bpp2i_horz.pixel
pop esi edx ebx
add esi, [scanline_len]
mov edi, [scanline_len]
dec ecx
jnz .bpp2i_horz.begin
jmp .exit
.bpp4i_horz:
mov edi, [scanline_len]
mov edx, [ebx + Image.Width]
and edx, 1
neg edx
add edx, 2
and edx, 1
.bpp4i_horz.begin:
push ebx edx esi
mov eax, 1
add edi, esi
sub edi, 1
mov ebx, [ebx + Image.Width]
shr ebx, 1
.bpp4i_horz.pixel:
push ebx ecx
mov ebx, 15
mov ecx, edx
shl ecx, 2
shl ebx, cl
and bl, [edi]
shr ebx, cl
mov bh, 15
mov ecx, eax
shl ecx, 2
shl ebx, cl
not bh
and bh, [esi]
or bl, bh
mov bh, [esi]
mov [esi], bl
shr ebx, 8
shr ebx, cl
and ebx, 15
mov bh, 15
mov ecx, edx
shl ecx, 2
shl ebx, cl
not bh
and bh, [edi]
or bl, bh
mov [edi], bl
pop ecx ebx
.bpp4i_horz.pixel_done:
inc edx
and edx, 1
jnz @f
dec edi
@@:
dec eax
jns @f
mov eax, 1
inc esi
@@:
dec ebx
jnz .bpp4i_horz.pixel
pop esi edx ebx
add esi, [scanline_len]
mov edi, [scanline_len]
dec ecx
jnz .bpp4i_horz.begin
jmp .exit
.exit:
xor eax, eax
inc eax
pop edi esi ebx
ret
.error:
xor eax, eax
pop edi esi ebx
ret
endp
;;================================================================================================;;
proc img.flip _img, _flip_kind ;//////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Flip all layers of image ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;> _flip_kind = one of FLIP_* constants ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
push 1
mov ebx, [_img]
@@:
mov eax, [ebx + Image.Previous]
test eax, eax
jz .loop
mov ebx, eax
jmp @b
.loop:
stdcall img.flip.layer, ebx, [_flip_kind]
test eax, eax
jnz @f
mov byte [esp], 0
@@:
mov ebx, [ebx + Image.Next]
test ebx, ebx
jnz .loop
pop eax
ret
endp
;;================================================================================================;;
proc img.rotate.layer _img, _rotate_kind ;////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Rotate image layer ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;> _rotate_kind = one of ROTATE_* constants ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
locals
scanline_len_old dd ?
scanline_len_new dd ?
scanline_pixels_new dd ?
line_buffer dd ?
pixels_ptr dd ?
endl
mov [line_buffer], 0
push ebx esi edi
mov ebx, [_img]
stdcall img._.validate, ebx
or eax, eax
jnz .error
cmp [_rotate_kind], ROTATE_90_CCW
je .rotate_ccw_low
cmp [_rotate_kind], ROTATE_90_CW
je .rotate_cw_low
cmp [_rotate_kind], ROTATE_180
je .flip
jmp .exit
.rotate_ccw_low:
mov eax, [ebx + Image.Height]
mov [scanline_pixels_new], eax
call img._.get_scanline_len
mov [scanline_len_new], eax
invoke mem.alloc, eax
or eax, eax
jz .error
mov [line_buffer], eax
mov eax, [ebx + Image.Width]
mov ecx, eax
call img._.get_scanline_len
mov [scanline_len_old], eax
mov eax, [scanline_len_new]
imul eax, ecx
add eax, [ebx + Image.Data]
mov [pixels_ptr], eax
cmp [ebx + Image.Type], Image.bpp1
jz .rotate_ccw1
cmp [ebx + Image.Type], Image.bpp2i
jz .rotate_ccw2i
cmp [ebx + Image.Type], Image.bpp4i
jz .rotate_ccw4i
cmp [ebx + Image.Type], Image.bpp8i
jz .rotate_ccw8ig
cmp [ebx + Image.Type], Image.bpp8g
jz .rotate_ccw8ig
cmp [ebx + Image.Type], Image.bpp24
jz .rotate_ccw24
cmp [ebx + Image.Type], Image.bpp32
jz .rotate_ccw32
.next_column_ccw_low1x:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -2
mov ecx, [scanline_pixels_new]
mov esi, [ebx + Image.Data]
mov edi, [line_buffer]
@@: mov ax, [esi]
mov [edi], ax
add esi, edx
add edi, 2
sub ecx, 1
jnz @b
mov eax, [scanline_pixels_new]
mov edi, [ebx + Image.Data]
lea esi, [edi + 2]
mov edx, [scanline_len_old]
@@: mov ecx, edx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
add esi, 1
sub eax, 1
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, [scanline_pixels_new]
mov esi, [line_buffer]
mov edi, [pixels_ptr]
mov edx, ecx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
pop ecx
jmp .next_column_ccw_low1x
.rotate_ccw32:
.next_column_ccw_low:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -4
mov ecx, [scanline_pixels_new]
mov esi, [ebx + Image.Data]
mov edi, [line_buffer]
@@: mov eax, [esi]
stosd
add esi, edx
dec ecx
jnz @b
mov eax, [scanline_pixels_new]
mov edi, [ebx + Image.Data]
lea esi, [edi + 4]
mov edx, [scanline_len_old]
shr edx, 2
@@: mov ecx, edx
rep movsd
add esi, 4
dec eax
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, [scanline_pixels_new]
mov esi, [line_buffer]
mov edi, [pixels_ptr]
rep movsd
pop ecx
jmp .next_column_ccw_low
.rotate_ccw8ig:
.next_column_ccw_low8ig:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -1
mov ecx, [scanline_pixels_new]
mov esi, [ebx + Image.Data]
mov edi, [line_buffer]
@@: mov al, [esi]
mov [edi], al
add esi, edx
add edi, 1
sub ecx, 1
jnz @b
mov eax, [scanline_pixels_new]
mov edi, [ebx + Image.Data]
lea esi, [edi + 1]
mov edx, [scanline_len_old]
@@: mov ecx, edx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
add esi, 1
sub eax, 1
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, [scanline_pixels_new]
mov esi, [line_buffer]
mov edi, [pixels_ptr]
mov edx, ecx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
pop ecx
jmp .next_column_ccw_low8ig
.rotate_ccw24:
.next_column_ccw_low24:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -3
mov ecx, [scanline_pixels_new]
mov esi, [ebx + Image.Data]
mov edi, [line_buffer]
@@: mov al, [esi]
mov [edi], al
mov al, [esi+1]
mov [edi+1], al
mov al, [esi+2]
mov [edi+2], al
add esi, edx
add edi, 3
sub ecx, 1
jnz @b
mov eax, [scanline_pixels_new]
mov edi, [ebx + Image.Data]
lea esi, [edi + 3]
mov edx, [scanline_len_old]
@@: mov ecx, edx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
add esi, 3
sub eax, 1
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, eax
mov esi, [line_buffer]
mov edi, [pixels_ptr]
shr ecx, 2
rep movsd
mov ecx, eax
and ecx, 3
rep movsb
pop ecx
jmp .next_column_ccw_low24
.rotate_ccw1:
push ecx edx
mov eax, [ebx + Image.Height]
add eax, 7
shr eax, 3
imul eax, [ebx + Image.Width]
push eax ; save new data size
invoke mem.alloc, eax
or eax, eax
jz .error
push eax ; save pointer to new data
mov ecx, [ebx + Image.Width]
and ecx, 7
neg ecx
add ecx, 8
and ecx, 7
mov edi, eax
mov esi, [ebx + Image.Data]
mov eax, 7
mov edx, [scanline_len_old]
dec edx
add esi, edx
.rotate_ccw1.begin:
bt [esi], ecx
jc .rotate_ccw1.one
.rotate_ccw1.zero:
btr [edi], eax
jmp @f
.rotate_ccw1.one:
bts [edi], eax
@@:
add esi, [scanline_len_old]
dec [scanline_pixels_new]
jz .rotate_ccw1.end_of_line
sub eax, 1
adc edi, 0
and eax, 7
jmp .rotate_ccw1.begin
.rotate_ccw1.end_of_line:
inc edi
mov eax, [ebx + Image.Height]
mov [scanline_pixels_new], eax
mov eax, 7
inc ecx
and ecx, 7
jz @f
mov esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_ccw1.begin
@@:
dec edx
js .rotate_ccw1.quit
mov esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_ccw1.begin
.rotate_ccw1.quit:
pop esi ; get pointer to new data
mov edi, [ebx + Image.Data]
pop ecx ; get new data size
rep movsb
invoke mem.free, esi
pop edx ecx
jmp .exchange_dims
.rotate_ccw2i:
push ecx edx
mov eax, [ebx + Image.Height]
add eax, 3
shr eax, 2
imul eax, [ebx + Image.Width]
push eax ; save new data size
invoke mem.alloc, eax
or eax, eax
jz .error
push eax ; save pointer to new data
mov ecx, [ebx + Image.Width]
and ecx, 3
neg ecx
add ecx, 4
and ecx, 3
mov edi, eax
mov esi, [ebx + Image.Data]
mov eax, 3
mov edx, [scanline_len_old]
dec edx
add esi, edx
.rotate_ccw2i.begin:
push ebx ecx
mov ebx, 3
shl ebx, cl
shl ebx, cl
and bl, [esi]
shr ebx, cl
shr ebx, cl
mov bh, 3
mov ecx, eax
shl ebx, cl
shl ebx, cl
not bh
and bh, [edi]
or bl, bh
mov [edi], bl
pop ecx ebx
add esi, [scanline_len_old]
dec [scanline_pixels_new]
jz .rotate_ccw2i.end_of_line
sub eax, 1
adc edi, 0
and eax, 3
jmp .rotate_ccw2i.begin
.rotate_ccw2i.end_of_line:
inc edi
mov eax, 3
mov esi, [ebx + Image.Height]
mov [scanline_pixels_new], esi
inc ecx
and ecx, 3
jz @f
mov esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_ccw2i.begin
@@:
dec edx
js .rotate_ccw2i.quit
mov esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_ccw2i.begin
.rotate_ccw2i.quit:
pop esi ; get pointer to new data
mov edi, [ebx + Image.Data]
pop ecx ; get new data size
rep movsb
invoke mem.free, esi
pop edx ecx
jmp .exchange_dims
.rotate_ccw4i:
push ecx edx
mov eax, [ebx + Image.Height]
add eax, 1
shr eax, 1
imul eax, [ebx + Image.Width]
push eax ; save new data size
invoke mem.alloc, eax
or eax, eax
jz .error
push eax ; save pointer to new data
mov ecx, [ebx + Image.Width]
and ecx, 1
neg ecx
add ecx, 2
and ecx, 1
mov edi, eax
mov esi, [ebx + Image.Data]
mov eax, 1
mov edx, [scanline_len_old]
dec edx
add esi, edx
.rotate_ccw4i.begin:
push ebx ecx
mov ebx, 15
shl ecx, 2
shl ebx, cl
and bl, [esi]
shr ebx, cl
mov bh, 15
mov ecx, eax
shl ecx, 2
shl ebx, cl
not bh
and bh, [edi]
or bl, bh
mov [edi], bl
pop ecx ebx
add esi, [scanline_len_old]
dec [scanline_pixels_new]
jz .rotate_ccw4i.end_of_line
sub eax, 1
adc edi, 0
and eax, 1
jmp .rotate_ccw4i.begin
.rotate_ccw4i.end_of_line:
inc edi
mov eax, 1
mov esi, [ebx + Image.Height]
mov [scanline_pixels_new], esi
inc ecx
and ecx, 1
jz @f
mov esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_ccw4i.begin
@@:
dec edx
js .rotate_ccw4i.quit
mov esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_ccw4i.begin
.rotate_ccw4i.quit:
pop esi ; get pointer to new data
mov edi, [ebx + Image.Data]
pop ecx ; get new data size
rep movsb
invoke mem.free, esi
pop edx ecx
jmp .exchange_dims
.rotate_cw_low:
mov eax, [ebx + Image.Height]
mov [scanline_pixels_new], eax
call img._.get_scanline_len
mov [scanline_len_new], eax
invoke mem.alloc, eax
or eax, eax
jz .error
mov [line_buffer], eax
mov eax, [ebx + Image.Width]
mov ecx, eax
call img._.get_scanline_len
mov [scanline_len_old], eax
mov eax, [scanline_len_new]
imul eax, ecx
add eax, [ebx + Image.Data]
mov [pixels_ptr], eax
cmp [ebx + Image.Type], Image.bpp1
jz .rotate_cw1
cmp [ebx + Image.Type], Image.bpp2i
jz .rotate_cw2i
cmp [ebx + Image.Type], Image.bpp4i
jz .rotate_cw4i
cmp [ebx + Image.Type], Image.bpp8i
jz .rotate_cw8ig
cmp [ebx + Image.Type], Image.bpp8g
jz .rotate_cw8ig
cmp [ebx + Image.Type], Image.bpp24
jz .rotate_cw24
cmp [ebx + Image.Type], Image.bpp32
jz .rotate_cw32
.next_column_cw_low1x:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -2
mov ecx, [scanline_pixels_new]
mov esi, [pixels_ptr]
add esi, -2
mov edi, [line_buffer]
@@: mov ax, [esi]
mov [edi], ax
sub esi, edx
add edi, 2
sub ecx, 1
jnz @b
mov eax, [scanline_pixels_new]
dec eax
mov edi, [ebx + Image.Data]
add edi, [scanline_len_old]
lea esi, [edi + 2]
mov edx, [scanline_len_old]
@@: mov ecx, edx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
add esi, 3
sub eax, 1
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, eax
mov esi, [line_buffer]
mov edi, [pixels_ptr]
shr ecx, 2
rep movsd
mov ecx, eax
and ecx, 3
rep movsb
pop ecx
jmp .next_column_cw_low1x
.rotate_cw32:
.next_column_cw_low:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -4
mov ecx, [scanline_pixels_new]
mov esi, [pixels_ptr]
add esi, -4
mov edi, [line_buffer]
@@: mov eax, [esi]
stosd
sub esi, edx
dec ecx
jnz @b
mov eax, [scanline_pixels_new]
dec eax
mov edi, [ebx + Image.Data]
add edi, [scanline_len_old]
lea esi, [edi + 4]
mov edx, [scanline_len_old]
shr edx, 2
@@: mov ecx, edx
rep movsd
add esi, 4
dec eax
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, [scanline_pixels_new]
mov esi, [line_buffer]
mov edi, [pixels_ptr]
rep movsd
pop ecx
jmp .next_column_cw_low
.rotate_cw8ig:
.next_column_cw_low8ig:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -1
mov ecx, [scanline_pixels_new]
mov esi, [pixels_ptr]
add esi, -1
mov edi, [line_buffer]
@@: mov al, [esi]
mov [edi], al
sub esi, edx
add edi, 1
sub ecx, 1
jnz @b
mov eax, [scanline_pixels_new]
dec eax
mov edi, [ebx + Image.Data]
add edi, [scanline_len_old]
lea esi, [edi + 1]
mov edx, [scanline_len_old]
@@: mov ecx, edx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
add esi, 1
sub eax, 1
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, eax
mov esi, [line_buffer]
mov edi, [pixels_ptr]
shr ecx, 2
rep movsd
mov ecx, eax
and ecx, 3
rep movsb
pop ecx
jmp .next_column_cw_low8ig
.rotate_cw24:
.next_column_cw_low24:
dec ecx
js .exchange_dims
push ecx
mov edx, [scanline_len_old]
add [scanline_len_old], -3
mov ecx, [scanline_pixels_new]
mov esi, [pixels_ptr]
add esi, -3
mov edi, [line_buffer]
@@: mov al, [esi]
mov [edi], al
mov al, [esi+1]
mov [edi+1], al
mov al, [esi+2]
mov [edi+2], al
sub esi, edx
add edi, 3
sub ecx, 1
jnz @b
mov eax, [scanline_pixels_new]
dec eax
mov edi, [ebx + Image.Data]
add edi, [scanline_len_old]
lea esi, [edi + 3]
mov edx, [scanline_len_old]
@@: mov ecx, edx
shr ecx, 2
rep movsd
mov ecx, edx
and ecx, 3
rep movsb
add esi, 3
sub eax, 1
jnz @b
mov eax, [scanline_len_new]
sub [pixels_ptr], eax
mov ecx, eax
mov esi, [line_buffer]
mov edi, [pixels_ptr]
shr ecx, 2
rep movsd
mov ecx, eax
and ecx, 3
rep movsb
pop ecx
jmp .next_column_cw_low24
.rotate_cw1:
push ecx edx
mov eax, [ebx + Image.Height]
add eax, 7
shr eax, 3
imul [ebx + Image.Width]
push eax ; save new data size
invoke mem.alloc, eax
or eax, eax
jz .error
push eax ; save pointer to new data
mov edi, eax
mov esi, [ebx + Image.Data]
mov eax, [ebx + Image.Height]
dec eax
imul eax, [scanline_len_old]
add esi, eax
mov eax, 7
mov ecx, 7
mov edx, 0
.rotate_cw1.begin:
bt [esi], ecx
jc .rotate_cw1.one
.rotate_cw1.zero:
btr [edi], eax
jmp @f
.rotate_cw1.one:
bts [edi], eax
@@:
sub esi, [scanline_len_old]
dec [scanline_pixels_new]
jz .rotate_cw1.end_of_line
sub eax, 1
adc edi, 0
and eax, 7
jmp .rotate_cw1.begin
.rotate_cw1.end_of_line:
inc edi
mov eax, [ebx + Image.Height]
mov [scanline_pixels_new], eax
mov eax, 7
dec ecx
jns @f
mov ecx, 7
inc edx
cmp edx, [scanline_len_old]
je .rotate_cw1.quit
@@:
mov esi, [ebx + Image.Height]
dec esi
imul esi, [scanline_len_old]
add esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_cw1.begin
.rotate_cw1.quit:
pop eax ; get pointer to new data
mov esi, eax
mov edi, [ebx + Image.Data]
pop ecx ; get new data size
rep movsb
invoke mem.free, eax
pop edx ecx
jmp .exchange_dims
.rotate_cw2i:
push ecx edx
mov eax, [ebx + Image.Height]
add eax, 3
shr eax, 2
imul [ebx + Image.Width]
push eax ; save new data size
invoke mem.alloc, eax
or eax, eax
jz .error
push eax ; save pointer to new data
mov edi, eax
mov esi, [ebx + Image.Data]
mov eax, [ebx + Image.Height]
dec eax
imul eax, [scanline_len_old]
add esi, eax
mov eax, 3
mov ecx, 3
mov edx, 0
.rotate_cw2i.begin:
push ebx ecx
mov ebx, 3
shl ebx, cl
shl ebx, cl
and bl, [esi]
shr ebx, cl
shr ebx, cl
mov bh, 3
mov ecx, eax
shl ebx, cl
shl ebx, cl
not bh
and bh, [edi]
or bl, bh
mov [edi], bl
pop ecx ebx
sub esi, [scanline_len_old]
dec [scanline_pixels_new]
jz .rotate_cw2i.end_of_line
sub eax, 1
adc edi, 0
and eax, 3
jmp .rotate_cw2i.begin
.rotate_cw2i.end_of_line:
inc edi
mov eax, [ebx + Image.Height]
mov [scanline_pixels_new], eax
mov eax, 3
dec ecx
jns @f
mov ecx, 3
inc edx
cmp edx, [scanline_len_old]
je .rotate_cw2i.quit
@@:
mov esi, [ebx + Image.Height]
dec esi
imul esi, [scanline_len_old]
add esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_cw2i.begin
.rotate_cw2i.quit:
pop eax ; get pointer to new data
mov esi, eax
mov edi, [ebx + Image.Data]
pop ecx ; get new data size
rep movsb
invoke mem.free, eax
pop edx ecx
jmp .exchange_dims
.rotate_cw4i:
push ecx edx
mov eax, [ebx + Image.Height]
add eax, 1
shr eax, 1
imul [ebx + Image.Width]
push eax ; save new data size
invoke mem.alloc, eax
or eax, eax
jz .error
push eax ; save pointer to new data
mov edi, eax
mov esi, [ebx + Image.Data]
mov eax, [ebx + Image.Height]
dec eax
imul eax, [scanline_len_old]
add esi, eax
mov eax, 1
mov ecx, 1
mov edx, 0
.rotate_cw4i.begin:
push ebx ecx
mov ebx, 15
shl ecx, 2
shl ebx, cl
and bl, [esi]
shr ebx, cl
mov bh, 15
mov ecx, eax
shl ecx, 2
shl ebx, cl
not bh
and bh, [edi]
or bl, bh
mov [edi], bl
pop ecx ebx
sub esi, [scanline_len_old]
dec [scanline_pixels_new]
jz .rotate_cw4i.end_of_line
sub eax, 1
adc edi, 0
and eax, 1
jmp .rotate_cw4i.begin
.rotate_cw4i.end_of_line:
inc edi
mov eax, [ebx + Image.Height]
mov [scanline_pixels_new], eax
mov eax, 1
dec ecx
jns @f
mov ecx, 1
inc edx
cmp edx, [scanline_len_old]
je .rotate_cw4i.quit
@@:
mov esi, [ebx + Image.Height]
dec esi
imul esi, [scanline_len_old]
add esi, [ebx + Image.Data]
add esi, edx
jmp .rotate_cw4i.begin
.rotate_cw4i.quit:
pop eax ; get pointer to new data
mov esi, eax
mov edi, [ebx + Image.Data]
pop ecx ; get new data size
rep movsb
invoke mem.free, eax
pop edx ecx
jmp .exchange_dims
.flip:
stdcall img.flip.layer, [_img], FLIP_VERTICAL
test eax, eax
jz .error
jmp .exit
.exchange_dims:
push [ebx + Image.Width] [ebx + Image.Height]
pop [ebx + Image.Width] [ebx + Image.Height]
.exit:
invoke mem.free, [line_buffer]
xor eax, eax
inc eax
pop edi esi ebx
ret
.error:
invoke mem.free, [line_buffer]
xor eax, eax
pop edi esi ebx
ret
endp
;;================================================================================================;;
proc img.rotate _img, _rotate_kind ;//////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Rotate all layers of image ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;> _rotate_kind = one of ROTATE_* constants ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
push 1
mov ebx, [_img]
@@:
mov eax, [ebx + Image.Previous]
test eax, eax
jz .loop
mov ebx, eax
jmp @b
.loop:
stdcall img.rotate.layer, ebx, [_rotate_kind]
test eax, eax
jnz @f
mov byte [esp], 0
@@:
mov ebx, [ebx + Image.Next]
test ebx, ebx
jnz .loop
pop eax
ret
endp
;;================================================================================================;;
proc img.draw _img, _x, _y, _width, _height, _xpos, _ypos ;///////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Draw image in the window ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;>_x = x-coordinate in the window ;;
;>_y = y-coordinate in the window ;;
;>_width = maximum width to draw ;;
;>_height = maximum height to draw ;;
;>_xpos = offset in image by x-axis ;;
;>_ypos = offset in image by y-axis ;;
;;------------------------------------------------------------------------------------------------;;
;< no return value ;;
;;================================================================================================;;
push ebx esi edi
mov ebx, [_img]
stdcall img._.validate, ebx
test eax, eax
jnz .done
mov ecx, [ebx + Image.Width]
sub ecx, [_xpos]
jbe .done
cmp ecx, [_width]
jb @f
mov ecx, [_width]
@@:
mov edx, [ebx + Image.Height]
sub edx, [_ypos]
jbe .done
cmp edx, [_height]
jb @f
mov edx, [_height]
@@:
mov eax, [ebx + Image.Width]
sub eax, ecx
call img._.get_scanline_len
shl ecx, 16
add ecx, edx
push eax
mov eax, [ebx + Image.Width]
imul eax, [_ypos]
add eax, [_xpos]
call img._.get_scanline_len
add eax, [ebx + Image.Data]
mov edx, [_x - 2]
mov dx, word [_y]
mov esi, [ebx + Image.Type]
mov esi, [type2bpp + (esi-1)*4]
mov edi, [ebx + Image.Palette]
xchg eax, ebx
pop eax
push ebp
push 65
pop ebp
xchg eax, ebp
int 40h
pop ebp
.done:
pop edi esi ebx
ret
endp
align 4
img.formats_table:
.bmp dd LIBIMG_FORMAT_BMP, img.is.bmp, img.decode.bmp, img.encode.bmp, 1 + (1 SHL Image.bpp24) + (1 SHL Image.bpp32)
.ico dd LIBIMG_FORMAT_ICO, img.is.ico, img.decode.ico_cur, img.encode.ico, 0
.cur dd LIBIMG_FORMAT_CUR, img.is.cur, img.decode.ico_cur, img.encode.cur, 0
.gif dd LIBIMG_FORMAT_GIF, img.is.gif, img.decode.gif, img.encode.gif, 0
.png dd LIBIMG_FORMAT_PNG, img.is.png, img.decode.png, img.encode.png, 1 + (1 SHL Image.bpp24)
.jpg dd LIBIMG_FORMAT_JPEG, img.is.jpg, img.decode.jpg, img.encode.jpg, 0
.tga dd LIBIMG_FORMAT_TGA, img.is.tga, img.decode.tga, img.encode.tga, 0
.pcx dd LIBIMG_FORMAT_PCX, img.is.pcx, img.decode.pcx, img.encode.pcx, 0
.xcf dd LIBIMG_FORMAT_XCF, img.is.xcf, img.decode.xcf, img.encode.xcf, 0
.tiff dd LIBIMG_FORMAT_TIFF, img.is.tiff, img.decode.tiff, img.encode.tiff,0
.pnm dd LIBIMG_FORMAT_PNM, img.is.pnm, img.decode.pnm, img.encode.pnm, 1 + (1 SHL Image.bpp1) + (1 SHL Image.bpp8g) + (1 SHL Image.bpp24)
.wbmp dd LIBIMG_FORMAT_WBMP, img.is.wbmp, img.decode.wbmp, img.encode.wbmp,0
.xbm dd LIBIMG_FORMAT_XBM, img.is.xbm, img.decode.xbm, img.encode.xbm, 0
.z80 dd LIBIMG_FORMAT_Z80, img.is.z80, img.decode.z80, img.encode.z80, 0 ;this must be the last entry as there are no signatures in z80 screens at all
dd 0
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Below are private procs you should never call directly from your code ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;;================================================================================================;;
proc img._.validate, _img ;///////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img._.new ;//////////////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to image ;;
;;================================================================================================;;
invoke mem.alloc, sizeof.Image
test eax, eax
jz @f
push ecx
xor ecx, ecx
mov [eax + Image.Data], ecx
mov [eax + Image.Type], ecx
mov [eax + Image.Flags], ecx
mov [eax + Image.Extended], ecx
mov [eax + Image.Previous], ecx
mov [eax + Image.Next], ecx
pop ecx
@@:
ret
endp
;;================================================================================================;;
proc img._.delete _img ;//////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
push edx
mov edx, [_img]
cmp [edx + Image.Data], 0
je @f
invoke mem.free, [edx + Image.Data]
@@: cmp [edx + Image.Extended], 0
je @f
invoke mem.free, [edx + Image.Extended]
@@: invoke mem.free, edx
pop edx
ret
endp
;;================================================================================================;;
proc img.resize_data _img, _width, _height ;//////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Resize data block of image. New size is calculated from _width and _height params and internal ;;
;? Image.Type value. All the internal fields are updated iff succeeded. ;;
;? This function does not scale images, use img.scale if you need to. ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;> _width = new width ;;
;> _height = new height ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 (fail) / pointer to the new pixels data ;;
;;================================================================================================;;
push ebx esi
mov ebx, [_img]
mov eax, [_height]
; our memory is limited, [_width]*[_height] must not overflow
; image with width or height greater than 65535 is most likely bogus
cmp word [_width+2], 0
jnz .error
cmp word [_height+2], 0
jnz .error
imul eax, [_width]
test eax, eax
jz .error
cmp [ebx + Image.Type], Image.bpp1
jz .bpp1
cmp [ebx + Image.Type], Image.bpp2i
jz .bpp2i
cmp [ebx + Image.Type], Image.bpp4i
jz .bpp4i
cmp [ebx + Image.Type], Image.bpp8i
jz .bpp8i
cmp [ebx + Image.Type], Image.bpp8g
jz .bpp8g
cmp [ebx + Image.Type], Image.bpp8a
jz .bpp8a
cmp [ebx + Image.Type], Image.bpp24
jz .bpp24
.bpp32:
shl eax, 2
jmp @f
.bpp24:
lea eax, [eax*3]
jmp @f
.bpp8i:
add eax, 256*4 ; for palette
.bpp8g:
jmp @f
.bpp8a:
shl eax, 1
jmp @f
.bpp4i:
mov eax, [_width]
add eax, 1
shr eax, 1
imul eax, [_height]
mov ecx, eax
mov eax, [_height]
add eax, 1
shr eax, 1
imul eax, [_width]
cmp eax, ecx
jge .bpp4i.skip
mov eax, ecx
.bpp4i.skip:
add eax, 16*4 ; for palette
jmp @f
.bpp2i:
mov eax, [_width]
add eax, 3
shr eax, 2
imul eax, [_height]
mov ecx, eax
mov eax, [_height]
add eax, 3
shr eax, 2
imul eax, [_width]
cmp eax, ecx
jge .bpp2i.skip
mov eax, ecx
.bpp2i.skip:
add eax, 4*4 ; for palette
jmp @f
.bpp1:
mov eax, [_width]
add eax, 7
shr eax, 3
imul eax, [_height]
mov ecx, eax
mov eax, [_height]
add eax, 7
shr eax, 3
imul eax, [_width]
cmp eax, ecx
jge .bpp1.skip
mov eax, ecx
.bpp1.skip:
add eax, 2*4 ; for palette
@@:
mov esi, eax
invoke mem.realloc, [ebx + Image.Data], eax
or eax, eax
jz .error
mov [ebx + Image.Data], eax
push [_width]
pop [ebx + Image.Width]
push [_height]
pop [ebx + Image.Height]
cmp [ebx + Image.Type], Image.bpp8i
jnz @f
lea esi, [eax + esi - 256*4]
mov [ebx + Image.Palette], esi
jmp .ret
@@:
cmp [ebx + Image.Type], Image.bpp1
jnz @f
lea esi, [eax + esi - 2*4]
mov [ebx + Image.Palette], esi
jmp .ret
@@:
cmp [ebx + Image.Type], Image.bpp2i
jnz @f
lea esi, [eax + esi - 4*4]
mov [ebx + Image.Palette], esi
jmp .ret
@@:
cmp [ebx + Image.Type], Image.bpp4i
jnz .ret
lea esi, [eax + esi - 16*4]
mov [ebx + Image.Palette], esi
jmp .ret
.error:
xor eax, eax
.ret:
pop esi ebx
ret
endp
;;================================================================================================;;
img._.get_scanline_len: ;/////////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Get scanline length of image in bytes ;;
;;------------------------------------------------------------------------------------------------;;
;> eax = width of image in pixels ;;
;> ebx = image ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = scanline length in bytes ;;
;;================================================================================================;;
cmp [ebx + Image.Type], Image.bpp1
jz .bpp1.1
cmp [ebx + Image.Type], Image.bpp2i
jz .bpp2i.1
cmp [ebx + Image.Type], Image.bpp4i
jz .bpp4i.1
cmp [ebx + Image.Type], Image.bpp8i
jz .bpp8.1
cmp [ebx + Image.Type], Image.bpp8g
jz .bpp8.1
cmp [ebx + Image.Type], Image.bpp8a
jz .bpp8a.1
cmp [ebx + Image.Type], Image.bpp24
jz .bpp24.1
add eax, eax
cmp [ebx + Image.Type], Image.bpp32
jnz .quit
add eax, eax
jmp .quit
.bpp24.1:
lea eax, [eax*3]
jmp .quit
.bpp1.1:
add eax, 7
shr eax, 3
jmp .quit
.bpp2i.1:
add eax, 3
shr eax, 2
jmp .quit
.bpp4i.1:
add eax, 1
shr eax, 1
jmp .quit
.bpp8a.1:
shl eax, 1
.bpp8.1:
.quit:
ret
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Below is private data you should never use directly from your code ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
section '.data' data readable writable align 16
;include_debug_strings
align 4
type2bpp dd 8, 24, 32, 15, 16, 1, 9, 2, 4
img._.do_rgb.handlers:
dd img._.do_rgb.bpp8i
dd img._.do_rgb.bpp24
dd img._.do_rgb.bpp32
dd img._.do_rgb.bpp15.amd ; can be overwritten in lib_init
dd img._.do_rgb.bpp16.amd ; can be overwritten in lib_init
dd img._.do_rgb.bpp1
dd img._.do_rgb.bpp8g
dd img._.do_rgb.bpp2i
dd img._.do_rgb.bpp4i
img.flip.layer.handlers_horz:
dd img.flip.layer.bpp8ig_horz
dd img.flip.layer.bpp24_horz
dd img.flip.layer.bpp32_horz
dd img.flip.layer.bpp1x_horz
dd img.flip.layer.bpp1x_horz
dd img.flip.layer.bpp1_horz
dd img.flip.layer.bpp8ig_horz
dd img.flip.layer.bpp2i_horz
dd img.flip.layer.bpp4i_horz
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Exported functions section ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
align 4
@EXPORT:
export \
lib_init , 'lib_init' , \
0x00050007 , 'version' , \
img.is_img , 'img_is_img' , \
img.info , 'img_info' , \
img.from_file , 'img_from_file' , \
img.to_file , 'img_to_file' , \
img.from_rgb , 'img_from_rgb' , \
img.to_rgb , 'img_to_rgb' , \
img.to_rgb2 , 'img_to_rgb2' , \
img.decode , 'img_decode' , \
img.encode , 'img_encode' , \
img.create , 'img_create' , \
img.destroy , 'img_destroy' , \
img.destroy.layer , 'img_destroy_layer' , \
img.count , 'img_count' , \
img.lock_bits , 'img_lock_bits' , \
img.unlock_bits , 'img_unlock_bits' , \
img.flip , 'img_flip' , \
img.flip.layer , 'img_flip_layer' , \
img.rotate , 'img_rotate' , \
img.rotate.layer , 'img_rotate_layer' , \
img.draw , 'img_draw' , \
img.scale , 'img_scale' , \
img.get_scaled_size, 'img_get_scaled_size', \
img.convert , 'img_convert' , \
img.blend , 'img_blend' , \
img.resize_data , 'img_resize_data' , \
img.formats_table , 'img_formats_table'
; import from deflate unpacker
; is initialized only when PNG loading is requested
align 16
@IMPORT:
library \
archiver, 'archiver.obj', \
libio , 'libio.obj'
import archiver, \
deflate_unpack2, 'deflate_unpack2',\
deflateInit2, 'deflateInit2',\
deflateReset, 'deflateReset',\
deflate, 'deflate',\
deflateEnd, 'deflateEnd',\
calc_crc32, 'calc_crc32'
import libio , \
file.size , 'file_size' , \
file.open , 'file_open' , \
file.read , 'file_read' , \
file.close, 'file_close'
align 4
; mutex for unpacker loading
deflate_loader_mutex dd 0
; default palette for GIF - b&w
gif_default_palette:
db 0, 0, 0
db 0xFF, 0xFF, 0xFF
; uninitialized data - global constant tables
mem.alloc dd ?
mem.free dd ?
mem.realloc dd ?
dll.load dd ?
; data for YCbCr -> RGB translation
color_table_1 rd 256
color_table_2 rd 256
color_table_3 rd 256
color_table_4 rd 256