From 5a907e131b6c5d860eee054a947c7bd0a9352e40 Mon Sep 17 00:00:00 2001
From: IgorA <aie85playm@gmail.com>
Date: Mon, 17 Mar 2025 00:43:15 +0200
Subject: [PATCH] Movback: Added support window resizing

---
 programs/demos/movback/movback.asm | 79 +++++++++++++++++++++++++-----
 1 file changed, 66 insertions(+), 13 deletions(-)

diff --git a/programs/demos/movback/movback.asm b/programs/demos/movback/movback.asm
index 040a9714b..ed02dfa53 100644
--- a/programs/demos/movback/movback.asm
+++ b/programs/demos/movback/movback.asm
@@ -7,14 +7,18 @@
 include "../../macros.inc"
 include "../../KOSfuncs.inc"
 
-WND_SIZE_X		= 320
-WND_SIZE_Y		= 200
+KOS_APP_START
+
+Screen_W		dd 600-10 ;10 px for borders
+Screen_H		dd 400
 
 VC_DELTA = 1
 HC_DELTA = 2
 
-MEOS_APP_START
+
 CODE
+	mcall SF_SYS_MISC,SSF_HEAP_INIT
+	call OnResize
     fninit
     call init_sinus_table
     call init_background
@@ -22,6 +26,7 @@ CODE
     mcall SF_SET_EVENTS_MASK, 101b
     jmp .paint_window
 
+align 4
 .event_loop:
     mcall SF_WAIT_EVENT_TIMEOUT, 1
 
@@ -39,23 +44,62 @@ CODE
     add word [hor_counter],HC_DELTA
     call handle_animation
     xor ebp,ebp
-    mcall SF_PUT_IMAGE_EXT, virtual_screen_8,<WND_SIZE_X,WND_SIZE_Y>,<0,0>,8,_palette
+	mov ecx,[Screen_W]
+	shl ecx,16
+	add ecx,[Screen_H]
+    mcall SF_PUT_IMAGE_EXT, [virtual_screen_8],,<0,0>,8,_palette
     jmp .event_loop
 
 .paint_window:
     mcall SF_THREAD_INFO, proc_info,-1
+	cmp dword[proc_info.box.height],0
+	je .resize_end
+	mcall SF_STYLE_SETTINGS, SSF_GET_SKIN_HEIGHT
+	add eax,4
+	sub eax,[proc_info.box.height]
+	neg eax
+	cmp eax,[Screen_H]
+	je .end_h
+	cmp eax,32 ;min height
+	jge @f
+		mov eax,32
+	@@:
+	mov [Screen_H],eax
+	xor eax,eax
+	mov [Screen_W],eax
+	.end_h:
+	
+	mov eax,[proc_info.box.width]
+	sub eax,9
+	cmp eax,[Screen_W]
+	je .resize_end
+	cmp eax,64 ;min width
+	jge @f
+		mov eax,64
+	@@:
+	mov [Screen_W],eax
+
+	call OnResize
+	.resize_end:
+
     mcall SF_REDRAW, SSF_BEGIN_DRAW
 
     mcall SF_STYLE_SETTINGS, SSF_GET_SKIN_HEIGHT
-    lea ecx,[eax + (100 shl 16) + WND_SIZE_Y+4]
+    lea ecx,[eax + (100 shl 16) +4]
+	add ecx,[Screen_H]
     mov edi,title
-    mcall SF_CREATE_WINDOW, <100,WND_SIZE_X+9>,,0x74000000
+	mov ebx,(100 shl 16)+9
+	add ebx,[Screen_W]
+    mcall SF_CREATE_WINDOW,,,0x73000000
 
     test [proc_info.wnd_state], 0x04
     jnz @f
 
     xor ebp,ebp
-    mcall SF_PUT_IMAGE_EXT, virtual_screen_8,<WND_SIZE_X,WND_SIZE_Y>,<0,0>,8,_palette
+	mov ecx,[Screen_W]
+	shl ecx,16
+	add ecx,[Screen_H]
+    mcall SF_PUT_IMAGE_EXT, [virtual_screen_8],,<0,0>,8,_palette
   @@:
     mcall SF_REDRAW, SSF_END_DRAW
 
@@ -110,6 +154,14 @@ init_background:
     jne .ib_vertical
     ret
 
+align 4
+OnResize:
+	mov ecx,[Screen_W]
+	imul ecx,[Screen_H]
+	mcall SF_SYS_MISC,SSF_MEM_REALLOC,,[virtual_screen_8]
+	mov [virtual_screen_8],eax
+	ret
+
 s_OFFX		= 0
 s_OFFY		= 2
 
@@ -125,10 +177,12 @@ handle_animation:
     add ebx,ebx
     mov ax,[sinetable+ebx]
     mov [esp+s_OFFX],ax
-    mov edi,virtual_screen_8
-    mov edx,WND_SIZE_Y-1
+    mov edi,[virtual_screen_8]
+    mov edx,[Screen_H]
+	dec edx
 .a_ver:
-    mov ecx,WND_SIZE_X-1
+    mov ecx,[Screen_W]
+	dec ecx
     mov bx,[esp+s_OFFY]
     add bx,dx
     and ebx,255
@@ -158,8 +212,7 @@ UDATA
 
   _palette:	rd 256
 
-  virtual_screen_8:
-  	rb WND_SIZE_X*WND_SIZE_Y
+  virtual_screen_8 dd ?
 
   background:
   	rb 256*256
@@ -169,4 +222,4 @@ UDATA
 
   proc_info	process_information
 
-MEOS_APP_END
+KOS_APP_END