;;================================================================================================;;
;;//// scale.asm //// (c) dunkaist, 2012 /////////////////////////////////////////////////////////;;
;;================================================================================================;;
;; ;;
;; 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 <http://www.gnu.org/licenses/>. ;;
;; ;;
;;================================================================================================;;
;;================================================================================================;;
proc img.get_scaled_size _width, _height, _scale_type, _param1, _param2 ;;
;;------------------------------------------------------------------------------------------------;;
;? calculate resulting width and height if image of _width and _height is scaled via _scale_type ;;
;;------------------------------------------------------------------------------------------------;;
;> [_width] = width of input image ;;
;> [_height] = height of input image ;;
;> [_scale_type] = see libimg.inc (LIBIMG_SCALE_*) ;;
;> [_param1] = depends on _scale_type, see libimg.inc ;;
;> [_param2] = depends on _scale_type, see libimg.inc ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = width ;;
;< ecx = height ;;
;;================================================================================================;;
push ebx esi edi
mov eax, [_scale_type]
cmp eax, LIBIMG_SCALE_FIT_MIN
jz .fit_min
.fit_min:
xor edx, edx
mov eax, [_width]
shl eax, 1
mov ecx, [_param1]
add eax, ecx
shl eax, 15
div ecx
mov ebx, eax
xor edx, edx
mov eax, [_height]
shl eax, 1
mov ecx, [_param2]
add eax, ecx
shl eax, 15
div ecx
cmp eax, ebx
ja .fit_height
jmp .fit_width
jmp .quit
.fit_max:
jmp .quit
.fit_width:
xor edx, edx
mov eax, [_width]
shl eax, 16
div [_param1]
mov ecx, eax
xor edx, edx
mov eax, [_height]
shl eax, 16
mov ebx, ecx
shr ebx, 1
add eax, ebx
div ecx
mov ecx, eax
mov eax, [_param1]
jmp .quit
.fit_height:
xor edx, edx
mov eax, [_height]
shl eax, 16
div [_param2]
mov ecx, eax
xor edx, edx
mov eax, [_width]
shl eax, 16
mov ebx, ecx
shr ebx, 1
add eax, ebx
div ecx
mov ecx, [_param2]
jmp .quit
.quit:
pop edi esi ebx
ret
endp
;;================================================================================================;;
proc img.scale _src, _crop_x, _crop_y, _crop_width, _crop_height, _dst, _scale, _inter, _param1, _param2 ;;
;;------------------------------------------------------------------------------------------------;;
;? scale _image ;;
;;------------------------------------------------------------------------------------------------;;
;> [_src] = pointer to source image ;;
;> [_crop_x] = left coord of cropping rect ;;
;> [_crop_y] = top coord of cropping rect ;;
;> [_crop_width] = width of cropping rect ;;
;> [_crop_height] = height of cropping rect ;;
;> [_dst] = pointer to resulting image, 0 to create new one ;;
;> [_scale] = scaling method, see libimg.inc (LIBIMG_SCALE_*) ;;
;> [_inter] = interpolation algorithm, see libimg.inc (LIBIMG_INTER_*) ;;
;> [_param1] = depends on _scale, see libimg.inc ;;
;> [_param2] = depends on _scale, see libimg.inc ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to scaled image ;;
;< ecx = error code / undefined ;;
;;================================================================================================;;
push ebx esi edi 0 0
mov ebx, [_src]
@@:
mov eax, [ebx + Image.Previous]
test eax, eax
jz .loop
mov ebx, eax
jmp @b
.loop:
stdcall img.scale.layer, ebx, [_crop_x], [_crop_y], [_crop_width], [_crop_height], [_dst], [_scale], [_inter], [_param1], [_param2]
test eax, eax
jz .error
cmp dword[esp + 4], 0
jnz @f
mov [esp + 4], eax
@@:
mov ecx, [esp]
jecxz @f
mov [ecx + Image.Next], eax
@@:
push [ebx + Image.Flags]
pop [eax + Image.Flags]
push [ebx + Image.Delay]
pop [eax + Image.Delay]
mov [eax + Image.Previous], ecx
mov [esp], eax
mov ebx, [ebx + Image.Next]
test ebx, ebx
jnz .loop
.quit:
pop eax eax edi esi ebx
ret
.error:
pop eax eax edi esi ebx
ret
endp
;;================================================================================================;;
proc img.scale.layer _src, _crop_x, _crop_y, _crop_width, _crop_height, _dst, _scale, _inter, _param1, _param2 ;;
;;------------------------------------------------------------------------------------------------;;
;? scale _image layer ;;
;;------------------------------------------------------------------------------------------------;;
;> [_src] = pointer to source image ;;
;> [_crop_x] = left coord of cropping rect ;;
;> [_crop_y] = top coord of cropping rect ;;
;> [_crop_width] = width of cropping rect ;;
;> [_crop_height] = height of cropping rect ;;
;> [_dst] = pointer to resulting image, 0 to create new one ;;
;> [_scale] = scaling method, see libimg.inc (LIBIMG_SCALE_*) ;;
;> [_inter] = interpolation algorithm, see libimg.inc (LIBIMG_INTER_*) ;;
;> [_param1] = depends on _scale, see libimg.inc ;;
;> [_param2] = depends on _scale, see libimg.inc ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 / pointer to scaled image ;;
;< ecx = error code / undefined ;;
;;================================================================================================;;
locals
src_type rd 1
src_data rd 1
dst_data rd 1
src_width_pixels rd 1
src_width_bytes rd 1
src_height_pixels rd 1
dst_width_pixels rd 1
dst_width_pixels_inv rd 1
dst_height_pixels rd 1
dst_height_pixels_inv rd 1
dst_width_bytes rd 1
bytes_per_pixel rd 1
crop_width_pixels_m1 rd 1
crop_height_pixels_m1 rd 1
; bilinear
src_x rd 1
src_y rd 1
src_base rd 1
dst_x rd 1
dst_y rd 1
rem_x rd 1
rem_y rd 1
endl
push ebx esi edi
mov ebx, [_src]
push [ebx + Image.Width]
pop [src_width_pixels]
push [ebx + Image.Height]
pop [src_height_pixels]
push [ebx + Image.Type]
pop [src_type]
push [ebx + Image.Data]
pop [src_data]
mov eax, [src_type]
mov ecx, [src_width_pixels]
mov edx, [src_width_pixels]
imul edx, [_crop_y]
add edx, [_crop_x]
cmp eax, Image.bpp32
jne @f
mov [bytes_per_pixel], 4
shl ecx, 2
shl edx, 2
jmp .lab1
@@:
cmp eax, Image.bpp24
jne @f
mov [bytes_per_pixel], 3
lea ecx, [ecx*3]
lea edx, [edx*3]
jmp .lab1
@@:
cmp eax, Image.bpp8g
jne @f
mov [bytes_per_pixel], 1
jmp .lab1
@@:
mov ecx, LIBIMG_ERROR_BIT_DEPTH
jmp .error
.lab1:
mov [src_width_bytes], ecx
add [src_data], edx
mov eax, [_scale]
cmp eax, LIBIMG_SCALE_INTEGER
je .scale_type.integer
cmp eax, LIBIMG_SCALE_TILE
je .scale_type.tile
cmp eax, LIBIMG_SCALE_FIT_RECT
je .scale_type.fit_rect
cmp eax, LIBIMG_SCALE_FIT_WIDTH
je .scale_type.fit_width
cmp eax, LIBIMG_SCALE_FIT_HEIGHT
je .scale_type.fit_height
cmp eax, LIBIMG_SCALE_FIT_MAX
je .scale_type.fit_max
cmp eax, LIBIMG_SCALE_STRETCH
je .scale_type.stretch
mov ecx, LIBIMG_ERROR_SCALE
jmp .error
.scale_type.integer:
jmp .integer
.scale_type.tile:
jmp .tile
.scale_type.fit_rect:
.scale_type.fit_max:
.scale_type.fit_width:
.scale_type.fit_height:
mov eax, [_src]
stdcall img.get_scaled_size, [eax + Image.Width], [eax + Image.Height], [_scale], [_param1], [_param2]
mov [_param1], eax
mov [_param2], ecx
.scale_type.stretch:
mov eax, [_param1]
mov [dst_width_pixels], eax
imul eax, [bytes_per_pixel]
mov [dst_width_bytes], eax
mov ecx, [_param2]
mov [dst_height_pixels], ecx
jmp .define_inter
.define_inter:
mov eax, [_inter]
cmp eax, LIBIMG_INTER_BILINEAR
je .bilinear
mov ecx, LIBIMG_ERROR_INTER
jmp .error
.integer:
mov eax, [_param1]
mov ecx, [_crop_width]
imul ecx, eax
mov [dst_width_pixels], ecx
mov edx, [_crop_height]
imul edx, eax
mov [dst_height_pixels], edx
mov eax, [_dst]
test eax, eax
jnz @f
stdcall img.create, [dst_width_pixels], [dst_height_pixels], [src_type]
test eax, eax
jz .error
mov [_dst], eax
mov edi, [_src]
push [edi + Image.Flags]
pop [eax + Image.Flags]
push [edi + Image.Delay]
pop [eax + Image.Delay]
push [edi + Image.Previous]
pop [eax + Image.Previous]
push [edi + Image.Next]
pop [eax + Image.Next]
@@:
mov edi, [eax + Image.Data]
mov [dst_data], edi
mov esi, [src_data]
mov eax, [src_type]
cmp eax, Image.bpp8g
je .integer.bpp8g
cmp eax, Image.bpp24
je .integer.bpp24
cmp eax, Image.bpp32
je .integer.bpp32
mov ecx, LIBIMG_ERROR_BIT_DEPTH
jmp .error
.integer.bpp8g:
push [dst_width_pixels]
pop [dst_width_bytes]
mov ecx, [_param1]
; cmp ecx, 1
; je .error
.integer.bpp8g.common:
mov edx, ecx
mov ebx, [_crop_height]
.integer.bpp8g.common.line:
push ebx
mov ebx, [_crop_width]
@@:
lodsb
mov ecx, edx
rep stosb
dec ebx
jnz @b
push esi
mov esi, edi
sub esi, [dst_width_bytes]
mov ecx, edx
dec ecx
imul ecx, [dst_width_bytes]
mov eax, ecx
shr ecx, 2
and eax, 0x00000003
rep movsd
mov ecx, eax
rep movsb
pop esi
mov eax, [src_width_pixels]
sub eax, [_crop_width]
add esi, eax
pop ebx
dec ebx
jnz .integer.bpp8g.common.line
mov eax, [_dst]
jmp .quit
.integer.bpp24:
mov eax, [dst_width_pixels]
lea eax, [eax*3]
mov [dst_width_bytes], eax
mov ecx, [_param1]
; cmp ecx, 1
; je .error
.integer.bpp24.common:
mov edx, ecx
mov ebx, [_crop_height]
.integer.bpp24.common.line:
push ebx
mov ebx, [_crop_width]
@@:
movsw
movsb
mov ecx, edx
push esi
mov esi, edi
sub esi, 3
dec ecx
lea ecx, [ecx*3]
rep movsb
pop esi
dec ebx
jnz @b
push esi
mov esi, edi
sub esi, [dst_width_bytes]
mov ecx, edx
dec ecx
imul ecx, [dst_width_bytes]
mov eax, ecx
shr ecx, 2
and eax, 0x00000003
rep movsd
mov ecx, eax
rep movsb
pop esi
mov eax, [src_width_pixels]
sub eax, [_crop_width]
lea eax, [eax*3]
add esi, eax
pop ebx
dec ebx
jnz .integer.bpp24.common.line
mov eax, [_dst]
jmp .quit
.integer.bpp32:
mov eax, [dst_width_pixels]
shl eax, 2
mov [dst_width_bytes], eax
mov ecx, [_param1]
; cmp ecx, 1
; je .error
.integer.bpp32.common:
mov edx, ecx
mov ebx, [_crop_height]
.integer.bpp32.common.line:
push ebx
mov ebx, [_crop_width]
@@:
lodsd
mov ecx, edx
rep stosd
dec ebx
jnz @b
push esi
mov esi, edi
sub esi, [dst_width_bytes]
mov ecx, edx
dec ecx
imul ecx, [dst_width_bytes]
shr ecx, 2
rep movsd
pop esi
mov eax, [src_width_pixels]
sub eax, [_crop_width]
shl eax, 2
add esi, eax
pop ebx
dec ebx
jnz .integer.bpp32.common.line
mov eax, [_dst]
jmp .quit
.tile:
mov eax, [_param1]
mov [dst_width_pixels], eax
imul eax, [bytes_per_pixel]
mov [dst_width_bytes], eax
mov eax, [_param2]
mov [dst_height_pixels], eax
mov eax, [_dst]
test eax, eax
jnz @f
stdcall img.create, [dst_width_pixels], [dst_height_pixels], [src_type]
test eax, eax
jz .error
mov [_dst], eax
mov edi, [_src]
push [edi + Image.Flags]
pop [eax + Image.Flags]
push [edi + Image.Delay]
pop [eax + Image.Delay]
push [edi + Image.Previous]
pop [eax + Image.Previous]
push [edi + Image.Next]
pop [eax + Image.Next]
@@:
mov edi, [eax + Image.Data]
mov [dst_data], edi
mov esi, [src_data]
mov eax, [_crop_height]
cmp eax, [dst_height_pixels]
jna @f
mov eax, [dst_height_pixels]
@@:
push eax
mov ecx, [_crop_width]
cmp ecx, [dst_width_pixels]
jna @f
mov ecx, [dst_width_pixels]
@@:
imul ecx, [bytes_per_pixel]
mov edx, ecx
@@:
mov ecx, edx
rep movsb
push esi
mov esi, edi
sub esi, edx
mov ecx, [dst_width_bytes]
sub ecx, edx
rep movsb
pop esi
mov ecx, [src_width_bytes]
sub ecx, edx
add esi, ecx
dec eax
jnz @b
pop eax
mov esi, [dst_data]
mov ecx, [dst_height_pixels]
sub ecx, eax
imul ecx, [dst_width_bytes]
rep movsb
mov eax, [_dst]
jmp .quit
.bilinear:
mov eax, [_dst]
test eax, eax
jnz @f
stdcall img.create, [dst_width_pixels], [dst_height_pixels], [src_type]
test eax, eax
jz .error
mov [_dst], eax
mov edi, [_src]
push [edi + Image.Flags]
pop [eax + Image.Flags]
push [edi + Image.Delay]
pop [eax + Image.Delay]
push [edi + Image.Previous]
pop [eax + Image.Previous]
push [edi + Image.Next]
pop [eax + Image.Next]
@@:
mov edi, [eax + Image.Data]
mov [dst_data], edi
push [_crop_width]
pop [crop_width_pixels_m1]
sub [crop_width_pixels_m1], 1
push [_crop_height]
pop [crop_height_pixels_m1]
sub [crop_height_pixels_m1], 1
mov eax, 0xffffffff
xor edx, edx
div [dst_width_pixels]
mov [dst_width_pixels_inv], eax
mov eax, 0xffffffff
xor edx, edx
div [dst_height_pixels]
mov [dst_height_pixels_inv], eax
mov eax, [src_type]
cmp eax, Image.bpp8g
je .bilinear.bpp8g
cmp eax, Image.bpp24
je .bilinear.bpp24
cmp eax, Image.bpp32
je .bilinear.bpp32
mov ecx, LIBIMG_ERROR_BIT_DEPTH
jmp .error
.bilinear.bpp8g:
mov esi, [src_data]
mov [dst_y], 0
mov eax, 0 ; mov eax, [dst_y]
.bilinear.bpp8g.line:
mov esi, [src_data]
mov [dst_x], 0
imul eax, [crop_height_pixels_m1]
xor edx, edx
div [dst_height_pixels]
mov [rem_y], edx
imul eax, [src_width_bytes]
add esi, eax
mov [src_base], esi
mov eax, 0 ; mov eax, [dst_x]
.bilinear.bpp8g.pixel:
mov esi, [src_base]
imul eax, [crop_width_pixels_m1]
xor edx, edx
div [dst_width_pixels]
add esi, eax
mov ax, word[esi]
add esi, [src_width_pixels]
mov bx, word[esi]
mov esi, edx
movzx edx, ah
and eax, 0x000000ff
movzx ecx, bh
and ebx, 0x000000ff
imul edx, esi
imul ecx, esi
neg esi
add esi, [dst_width_pixels]
imul eax, esi
imul ebx, esi
add eax, edx
add ebx, ecx
mov esi, [dst_width_pixels_inv]
mul esi
mov ecx, edx
mov eax, ebx
mul esi
mov eax, edx
mov edx, [rem_y]
imul eax, edx
neg edx
add edx, [dst_height_pixels]
imul ecx, edx
add eax, ecx
mul [dst_height_pixels_inv]
mov byte[edi], dl
add edi, 1
add [dst_x], 1
mov eax, [dst_x]
cmp eax, [dst_width_pixels]
jne .bilinear.bpp8g.pixel
add [dst_y], 1
mov eax, [dst_y]
cmp eax, [dst_height_pixels]
jne .bilinear.bpp8g.line
mov eax, [_dst]
jmp .quit
.bilinear.bpp24:
mov esi, [src_data]
mov [dst_y], 0
mov eax, 0 ; mov eax, [dst_y]
.bilinear.bpp24.line:
mov esi, [src_data]
mov [dst_x], 0
imul eax, [crop_height_pixels_m1]
xor edx, edx
div [dst_height_pixels]
mov [rem_y], edx
imul eax, [src_width_bytes]
add esi, eax
mov [src_base], esi
mov eax, 0 ; mov eax, [dst_x]
.bilinear.bpp24.pixel:
mov esi, [src_base]
imul eax, [crop_width_pixels_m1]
xor edx, edx
div [dst_width_pixels]
lea eax, [eax*3]
add esi, eax
mov [rem_x], edx
sub esi, 1
mov [src_x], esi
repeat 3
mov edx, [rem_x]
add [src_x], 1
mov esi, [src_x]
mov al, byte[esi]
mov ah, byte[esi + 3]
add esi, [src_width_bytes]
movzx ebx, byte[esi]
movzx ecx, byte[esi + 3]
mov esi, edx
movzx edx, ah
and eax, 0x000000ff
imul edx, esi
imul ecx, esi
neg esi
add esi, [dst_width_pixels]
imul eax, esi
imul ebx, esi
add eax, edx
add ebx, ecx
mov esi, [dst_width_pixels_inv]
mul esi
mov ecx, edx
mov eax, ebx
mul esi
mov eax, edx
mov edx, [rem_y]
imul eax, edx
neg edx
add edx, [dst_height_pixels]
imul ecx, edx
add eax, ecx
mul [dst_height_pixels_inv]
mov byte[edi], dl
add edi, 1
end repeat
add [dst_x], 1
mov eax, [dst_x]
cmp eax, [dst_width_pixels]
jne .bilinear.bpp24.pixel
add [dst_y], 1
mov eax, [dst_y]
cmp eax, [dst_height_pixels]
jne .bilinear.bpp24.line
mov eax, [_dst]
jmp .quit
.bilinear.bpp32:
mov esi, [src_data]
mov [dst_y], 0
mov eax, 0 ; mov eax, [dst_y]
.bilinear.bpp32.line:
mov esi, [src_data]
mov [dst_x], 0
imul eax, [crop_height_pixels_m1]
xor edx, edx
div [dst_height_pixels]
mov [rem_y], edx
imul eax, [src_width_bytes]
add esi, eax
mov [src_base], esi
mov eax, 0 ; mov eax, [dst_x]
.bilinear.bpp32.pixel:
mov esi, [src_base]
imul eax, [crop_width_pixels_m1]
xor edx, edx
div [dst_width_pixels]
shl eax, 2
add esi, eax
mov [rem_x], edx
sub esi, 1
mov [src_x], esi
repeat 4
mov edx, [rem_x]
add [src_x], 1
mov esi, [src_x]
mov al, byte[esi]
mov ah, byte[esi + 4]
add esi, [src_width_bytes]
movzx ebx, byte[esi]
movzx ecx, byte[esi + 4]
mov esi, edx
movzx edx, ah
and eax, 0x000000ff
imul edx, esi
imul ecx, esi
neg esi
add esi, [dst_width_pixels]
imul eax, esi
imul ebx, esi
add eax, edx
add ebx, ecx
mov esi, [dst_width_pixels_inv]
mul esi
mov ecx, edx
mov eax, ebx
mul esi
mov eax, edx
mov edx, [rem_y]
imul eax, edx
neg edx
add edx, [dst_height_pixels]
imul ecx, edx
add eax, ecx
mul [dst_height_pixels_inv]
mov byte[edi], dl
add edi, 1
end repeat
add [dst_x], 1
mov eax, [dst_x]
cmp eax, [dst_width_pixels]
jne .bilinear.bpp32.pixel
add [dst_y], 1
mov eax, [dst_y]
cmp eax, [dst_height_pixels]
jne .bilinear.bpp32.line
mov eax, [_dst]
jmp .quit
.error:
xor eax, eax
.quit:
pop edi esi ebx
ret
endp