| 发表于：2007-05-20 10:42:33 楼主 |
我的思路很简单，建一个win窗口，在wm_create消息时获取窗口设备场景，createcompatibledc一份设备场景hdcback做幕后处理，在hdcback中绘画完后，invalidaterect主窗口。等待进入wm_paint消息处理，用bitblt把hdcback传给win窗口。
思路有问题么?。。。
下面是部分代码：
_wndmainproc proc uses ebx edi esi, \
hwnd:dword,umsg:dword,wparam:dword,lparam:dword
local @stps:paintstruct
local @hdc:dword
local @hbrush:dword
mov eax,umsg
.if eax == wm_create
mov eax,hwnd
mov hwinmain,eax
call _init
;********************************************************************
.elseif eax == wm_paint
invoke beginpaint,hwnd,addr @stps
mov @hdc,eax
invoke drawtext,hdcback,addr szclassname,-1,addr @stps.rcpaint,\
dt_singleline or dt_center or dt_vcenter
mov eax,@stps.rcpaint.right
sub eax,@stps.rcpaint.left
mov ecx,@stps.rcpaint.bottom
sub ecx,@stps.rcpaint.top
invoke bitblt,@hdc,@stps.rcpaint.left,@stps.rcpaint.top,eax,ecx,\
hdcback,@stps.rcpaint.left,@stps.rcpaint.top,srccopy
invoke endpaint,hwnd,addr @stps
;********************************************************************
.elseif eax == wm_close
call _quit
;********************************************************************
.else
invoke defwindowproc,hwnd,umsg,wparam,lparam
ret
.endif
xor eax,eax
ret
_wndmainproc endp
_init proc
local @hdc:dword
local @strect:rect
local @hbrush:dword
invoke getclientrect,hwinmain,addr @strect
invoke getdc,hwinmain
mov @hdc,eax
invoke createcompatibledc,@hdc
mov hdcback,eax
invoke createhatchbrush,hs_diagcross,88888
invoke selectobject,hdcback,eax
invoke deleteobject,eax
invoke fillrect,hdcback,addr @strect,@hbrush
invoke drawtext,hdcback,addr szclassname,-1,addr @strect,\
dt_singleline or dt_center or dt_vcenter
mov eax,@strect.right
sub eax,@strect.left
mov ecx,@strect.bottom
sub ecx,@strect.top
invoke bitblt,hdcback,@strect.left,@strect.top,eax,ecx,\
@hdc,@strect.left,@strect.top,srccopy
invoke releasedc,hwinmain,@hdc
invoke invalidaterect,hwinmain,addr @strect,-1
ret
_init endp |
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