diff --git a/programs/develop/libraries/libs-dev/.test/002/test002.asm b/programs/develop/libraries/libs-dev/.test/002/test002.asm
index f4c2bf0332..85dbf07b57 100644
--- a/programs/develop/libraries/libs-dev/.test/002/test002.asm
+++ b/programs/develop/libraries/libs-dev/.test/002/test002.asm
@@ -14,6 +14,7 @@ include '../../../../../macros.inc'
 include '../dll.inc'
 
 include '../../libio/libio.inc'
+include '../../libimg/libimg.inc'
 
 ;-----------------------------------------------------------------------------
 
@@ -49,6 +50,7 @@ START:
 	invoke	img.decode, [img_data], [img_data_len]
 	or	eax, eax
 	jz	exit
+	mov	[image], eax
 	invoke	img.to_rgb, eax
 	or	eax, eax
 	jz	exit
@@ -75,16 +77,62 @@ still:
 
   button:
 	mcall	17
-	cmp	ah, 1
+	shr	eax, 8
+
+	; flip horizontally
+	cmp	eax, 'flh'
+	jne	@f
+
+	invoke	img.flip, [image], FLIP_HORIZONTAL
+	jmp	redraw_image
+
+	; flip vertically
+    @@: cmp	eax, 'flv'
+	jne	@f
+
+	invoke	img.flip, [image], FLIP_VERTICAL
+	jmp	redraw_image
+
+	; flip both horizontally and vertically
+    @@: cmp	eax, 'flb'
+	jne	@f
+
+	invoke	img.flip, [image], FLIP_BOTH
+	jmp	redraw_image
+
+	; rotate left
+    @@: cmp	eax, 'rtl'
+	jne	@f
+
+	invoke	img.rotate, [image], ROTATE_90_CCW
+	jmp	redraw_image
+
+	; rotate right
+    @@: cmp	eax, 'rtr'
+	jne	@f
+
+	invoke	img.rotate, [image], ROTATE_90_CW
+	jmp	redraw_image
+
+    @@: cmp	eax, 1
 	jne	still
 
   exit:
 	mcall	-1
 
+  redraw_image:
+	stdcall mem.Free, [rgb_img]
+	invoke	img.to_rgb, [image]
+	or	eax, eax
+	jz	exit
+	mov	[rgb_img], eax
+	jmp	red
+
 draw_window:
 	invoke	gfx.open, TRUE
 	mov	[ctx], eax
 
+@^
 	mov	edi, [rgb_img]
 	mov	ebx, 200 * 65536
 	mov	bx, [edi + 0]
@@ -93,13 +141,27 @@ draw_window:
 	mov	cx, [edi + 4]
 	add	cx, 5 + 21
 	mcall	0, , , 0x33FF0000, , s_header
+^@
+	mcall	0, <100, 640>, <100, 480>, 0x33FFFFFF, , s_header
+
+	invoke	gfx.pen.color, [ctx], 0x007F7F7F
+	invoke	gfx.line, [ctx], 0, 30, 630, 30
+
+	mcall	8, <5 + 25 * 0, 20>, <5, 20>, 'flh', 0x007F7F7F
+	mcall	8, <5 + 25 * 1, 20>, <5, 20>, 'flv', 0x007F7F7F
+	mcall	8, <5 + 25 * 2, 20>, <5, 20>, 'flb', 0x007F7F7F
+
+	invoke	gfx.line, [ctx], 5 + 25 * 3, 0, 5 + 25 * 3, 30
+
+	mcall	8, <10 + 25 * 3, 20>, <5, 20>, 'rtl', 0x007F7F7F
+	mcall	8, <10 + 25 * 4, 20>, <5, 20>, 'rtr', 0x007F7F7F
 
 	mov	ebx, [rgb_img]
 	mov	ecx, [ebx + 0]
 	shl	ecx, 16
 	mov	cx, [ebx + 4]
 	add	ebx, 4 * 2
-	mcall	7, , , <0, 0>
+	mcall	7, , , <5, 35>
 
 	invoke	gfx.close, [ctx]
 	ret
@@ -168,19 +230,26 @@ library 			\
 	libimg , 'libimg.obj'
 
 import	libio			  , \
+	libio.init , 'lib_init'   , \
 	file.size  , 'file.size'  , \
 	file.open  , 'file.open'  , \
 	file.read  , 'file.read'  , \
 	file.close , 'file.close'
 
-import	libgfx			, \
-	gfx.open  , 'gfx.open'	, \
-	gfx.close , 'gfx.close'
+import	libgfx				, \
+	libgfx.init   , 'lib_init'	, \
+	gfx.open      , 'gfx.open'	, \
+	gfx.close     , 'gfx.close'	, \
+	gfx.pen.color , 'gfx.pen.color' , \
+	gfx.line      , 'gfx.line'
 
-import	libimg			  , \
-	img.is_img , 'img.is_img' , \
-	img.to_rgb , 'img.to_rgb' , \
-	img.decode , 'img.decode'
+import	libimg			   , \
+	libimg.init , 'lib_init'   , \
+	img.is_img  , 'img.is_img' , \
+	img.to_rgb  , 'img.to_rgb' , \
+	img.decode  , 'img.decode' , \
+	img.flip    , 'img.flip'   , \
+	img.rotate  , 'img.rotate'
 
 ;-----------------------------------------------------------------------------
 
@@ -190,6 +259,7 @@ img_data     dd ?
 img_data_len dd ?
 fh	     dd ?
 rgb_img      dd ?
+image	     dd ?
 
 ctx dd ?
 
diff --git a/programs/develop/libraries/libs-dev/.test/dll.inc b/programs/develop/libraries/libs-dev/.test/dll.inc
index dbd5ff366c..e1cb98d178 100644
--- a/programs/develop/libraries/libs-dev/.test/dll.inc
+++ b/programs/develop/libraries/libs-dev/.test/dll.inc
@@ -58,7 +58,10 @@ endp
 
 proc dll.GetProcAddress, exp:dword,sz_name:dword
 		mov	edx,[exp]
-  .next:	test	edx,edx
+		xor	eax,eax
+  .next:	or	edx,edx
+		jz	.end
+		cmp	dword[edx],0
 		jz	.end
 		stdcall strcmp,[edx],[sz_name]
 		test	eax,eax
diff --git a/programs/develop/libraries/libs-dev/libimg/gif/gif.asm b/programs/develop/libraries/libs-dev/libimg/gif/gif.asm
index 7e6661da73..41c231b987 100644
--- a/programs/develop/libraries/libs-dev/libimg/gif/gif.asm
+++ b/programs/develop/libraries/libs-dev/libimg/gif/gif.asm
@@ -145,7 +145,7 @@ endl
 	jne	.error
 	movzx	eax, [ebx + gif.ImageDescriptor.Width]
 	movzx	ecx, [ebx + gif.ImageDescriptor.Height]
-	stdcall img._resize_data, [img], eax, ecx
+	stdcall img._.resize_data, [img], eax, ecx
 	or	eax, eax
 	jz	.error
 
diff --git a/programs/develop/libraries/libs-dev/libimg/libimg.asm b/programs/develop/libraries/libs-dev/libimg/libimg.asm
index 9cef637227..324dc1e3fb 100644
--- a/programs/develop/libraries/libs-dev/libimg/libimg.asm
+++ b/programs/develop/libraries/libs-dev/libimg/libimg.asm
@@ -235,7 +235,7 @@ proc img.create _width, _height ;///////////////////////////////////////////////
 
 	push	eax
 
-	stdcall img._resize_data, eax, [_width], [_height]
+	stdcall img._.resize_data, eax, [_width], [_height]
 	or	eax, eax
 	jz	.error.2
 
@@ -267,34 +267,47 @@ proc img.destroy _img ;/////////////////////////////////////////////////////////
 endp
 
 ;;================================================================================================;;
-proc img._resize_data _img, _width, _height ;/////////////////////////////////////////////////////;;
+proc img.count _img ;/////////////////////////////////////////////////////////////////////////////;;
 ;;------------------------------------------------------------------------------------------------;;
-;? --- TBD ---                                                                                    ;;
+;? Get number of images in the list (e.g. in animated GIF file)                                   ;;
 ;;------------------------------------------------------------------------------------------------;;
-;> --- TBD ---                                                                                    ;;
+;> _img = pointer to image                                                                        ;;
 ;;------------------------------------------------------------------------------------------------;;
-;< --- TBD ---                                                                                    ;;
+;< eax = -1 (fail) / >0 (ok)                                                                      ;;
 ;;================================================================================================;;
-	push	ebx
-	mov	ebx, [_img]
-	mov	eax, [_height]
-	imul	eax, [_width]
-	shl	eax, 2
-	invoke	mem.realloc, [ebx + Image.Data], eax
+	push	ecx edx
+	mov	edx, [_img]
+	stdcall img._.validate, edx
 	or	eax, eax
-	jz	.error
+	jnz	.error
 
-	mov	[ebx + Image.Data], eax
-	push	[_width]
-	pop	[ebx + Image.Width]
-	push	[_height]
-	pop	[ebx + Image.Height]
+    @@: 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:
-	pop	ebx
+	or	eax, -1
+	pop	edx ecx
 	ret
 endp
 
+;;//// image processing //////////////////////////////////////////////////////////////////////////;;
+
 ;;================================================================================================;;
 proc img.lock_bits _img, _start_line, _end_line ;/////////////////////////////////////////////////;;
 ;;------------------------------------------------------------------------------------------------;;
@@ -321,16 +334,15 @@ proc img.unlock_bits _img, _lock ;//////////////////////////////////////////////
 	ret
 endp
 
-;;//// image processing //////////////////////////////////////////////////////////////////////////;;
-
 ;;================================================================================================;;
 proc img.flip _img, _flip_kind ;//////////////////////////////////////////////////////////////////;;
 ;;------------------------------------------------------------------------------------------------;;
-;? --- TBD ---                                                                                    ;;
+;? Flip image                                                                                     ;;
 ;;------------------------------------------------------------------------------------------------;;
-;> --- TBD ---                                                                                    ;;
+;> _img = pointer to image                                                                        ;;
+;> _flip_kind = one of FLIP_* constants                                                           ;;
 ;;------------------------------------------------------------------------------------------------;;
-;< eax = false  / true                                                                            ;;
+;< eax = false / true                                                                             ;;
 ;;================================================================================================;;
 locals
   scanline_len dd ?
@@ -347,6 +359,8 @@ endl
 	shl	eax, 2
 	mov	[scanline_len], eax
 
+	push	esi
+
 	test	[_flip_kind], FLIP_VERTICAL
 	jz	.dont_flip_vert
 
@@ -360,27 +374,51 @@ endl
 	push	ecx
 
 	mov	ecx, [scanline_len]
+	shr	ecx, 2
     @@: lodsd
 	xchg	eax, [edi]
 	mov	[esi - 4], eax
 	add	edi, 4
-	add	ecx, -4
+	dec	ecx
 	jnz	@b
 
+	pop	ecx
 	mov	eax, [scanline_len]
 	shl	eax, 1
 	sub	edi, eax
-
-	pop	ecx
 	dec	ecx
 	jnz	.next_line_vert
 
   .dont_flip_vert:
 
+	pop	esi
+
 	test	[_flip_kind], FLIP_HORIZONTAL
 	jz	.exit
 
-	;TODO: horz flip code
+	mov	ecx, [esi + Image.Height]
+	mov	esi, [esi + Image.Data]
+	lea	edi, [esi - 4]
+	add	edi, [scanline_len]
+
+  .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
+	dec	ecx
+	jnz	@b
+
+	pop	edi esi ecx
+	add	esi, [scanline_len]
+	add	edi, [scanline_len]
+	dec	ecx
+	jnz	.next_line_horz
 
   .exit:
 	xor	eax, eax
@@ -394,6 +432,181 @@ endl
 	ret
 endp
 
+;;================================================================================================;;
+proc img.rotate _img, _rotate_kind ;//////////////////////////////////////////////////////////////;;
+;;------------------------------------------------------------------------------------------------;;
+;? Rotate image                                                                                   ;;
+;;------------------------------------------------------------------------------------------------;;
+;> _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
+	stdcall img._.validate, [_img]
+	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	ebx, [_img]
+	mov	eax, [ebx + Image.Height]
+	mov	[scanline_pixels_new], eax
+	shl	eax, 2
+	mov	[scanline_len_new], eax
+
+	invoke	mem.alloc, eax
+	or	eax, eax
+	jz	.error
+	mov	[line_buffer], eax
+
+	mov	ecx, [ebx + Image.Width]
+	lea	eax, [ecx * 4]
+	mov	[scanline_len_old], eax
+
+	mov	eax, [scanline_len_new]
+	imul	eax, ecx
+	add	eax, [ebx + Image.Data]
+	mov	[pixels_ptr], eax
+
+  .next_column_ccw_low:
+	dec	ecx
+	jz	.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_cw_low:
+	mov	ebx, [_img]
+	mov	eax, [ebx + Image.Height]
+	mov	[scanline_pixels_new], eax
+	shl	eax, 2
+	mov	[scanline_len_new], eax
+
+	invoke	mem.alloc, eax
+	or	eax, eax
+	jz	.error
+	mov	[line_buffer], eax
+
+	mov	ecx, [ebx + Image.Width]
+	lea	eax, [ecx * 4]
+	mov	[scanline_len_old], eax
+
+	mov	eax, [scanline_len_new]
+	imul	eax, ecx
+	add	eax, [ebx + Image.Data]
+	mov	[pixels_ptr], eax
+
+  .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
+
+  .flip:
+	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
+
 
 ;;================================================================================================;;
 ;;////////////////////////////////////////////////////////////////////////////////////////////////;;
@@ -452,6 +665,35 @@ proc img._.delete _img ;////////////////////////////////////////////////////////
 	ret
 endp
 
+;;================================================================================================;;
+proc img._.resize_data _img, _width, _height ;////////////////////////////////////////////////////;;
+;;------------------------------------------------------------------------------------------------;;
+;? --- TBD ---                                                                                    ;;
+;;------------------------------------------------------------------------------------------------;;
+;> --- TBD ---                                                                                    ;;
+;;------------------------------------------------------------------------------------------------;;
+;< --- TBD ---                                                                                    ;;
+;;================================================================================================;;
+	push	ebx
+	mov	ebx, [_img]
+	mov	eax, [_height]
+	imul	eax, [_width]
+	shl	eax, 2
+	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]
+
+  .error:
+	pop	ebx
+	ret
+endp
+
 
 ;;================================================================================================;;
 ;;////////////////////////////////////////////////////////////////////////////////////////////////;;
@@ -497,5 +739,8 @@ export					      \
 	img.encode	, 'img.encode'	    , \
 	img.create	, 'img.create'	    , \
 	img.destroy	, 'img.destroy'     , \
+	img.count	, 'img.count'	    , \
 	img.lock_bits	, 'img.lock_bits'   , \
-	img.unlock_bits , 'img.unlock_bits'
+	img.unlock_bits , 'img.unlock_bits' , \
+	img.flip	, 'img.flip'	    , \
+	img.rotate	, 'img.rotate'
diff --git a/programs/develop/libraries/libs-dev/libimg/libimg.inc b/programs/develop/libraries/libs-dev/libimg/libimg.inc
index 1222fe8354..aac8ab138b 100644
--- a/programs/develop/libraries/libs-dev/libimg/libimg.inc
+++ b/programs/develop/libraries/libs-dev/libimg/libimg.inc
@@ -37,3 +37,9 @@ ends
 FLIP_VERTICAL	= 0x01
 FLIP_HORIZONTAL = 0x02
 FLIP_BOTH	= FLIP_VERTICAL or FLIP_HORIZONTAL
+
+ROTATE_90_CW   = 0x01
+ROTATE_180     = 0x02
+ROTATE_270_CW  = 0x03
+ROTATE_90_CCW  = ROTATE_270_CW
+ROTATE_270_CCW = ROTATE_90_CW
diff --git a/programs/develop/libraries/libs-dev/libini/libini.asm b/programs/develop/libraries/libs-dev/libini/libini.asm
index c3d1ab9c3e..01fc91e4f6 100644
--- a/programs/develop/libraries/libs-dev/libini/libini.asm
+++ b/programs/develop/libraries/libs-dev/libini/libini.asm
@@ -1020,7 +1020,7 @@ endl
 	or	eax, eax
 	jnz	.exit_error
 
-	stdcall ini._.skip_nonblanks, [f]
+	stdcall ini._.skip_nonblanks, [f_addr]
 	xor	eax, eax
 	xor	ebx, ebx
 	xor	edx, edx