//----取得新增可视域-----------------------------------------------------------
//功能: 出现在visible_clip中且不在visible_bak的区域，加入redraw_clip。
// 同时出现在visible_clip和visible_bak中的部分，留在visible_clip中
// 如果dest_blend==true，则仅在visible_bak出现的部分留在visible_bak
// 否则，释放visiblvisible_bak
//参数: gkwin，目标窗口
//返回: 无
//-----------------------------------------------------------------------------
void __GK_GetNewClip(struct tagGkWinRsc *gkwin)
{
struct tagClipRect *redraw; //visible_clip-visible_bak多出的部分
struct tagClipRect *res; //visible_clip与visible_bak相交的clip
if(gkwin->visible_bak != NULL)
{
__GK_ClipLinkSub(gkwin->visible_clip,gkwin->visible_bak,&res,&redraw);
__GK_ClipLinkConnect(&gkwin->redraw_clip,redraw);
gkwin->visible_clip = res;
if(gkwin->dest_blend)
{
__GK_ClipLinkSub(gkwin->visible_bak,gkwin->visible_clip,
&res,&redraw);
gkwin->visible_bak = redraw;
__GK_FreeClipQueue(res);
}
else
{
gkwin->visible_bak = __GK_FreeClipQueue(gkwin->visible_bak);
}
}
else
{
__GK_ClipLinkConnect(&gkwin->redraw_clip,gkwin->visible_clip);
gkwin->visible_clip = NULL;
}
}
//----取得新增可视域-----------------------------------------------------------
//功能: 出现在visible_clip中且不在visible_bak的区域，加入redraw_clip。
// 同时出现在visible_clip和visible_bak中的部分，留在visible_clip中
// 如果dest_blend==true，则仅在visible_bak出现的部分留在visible_bak
// 否则，释放visiblvisible_bak
//参数: gkwin，目标窗口
//返回: 无
//-----------------------------------------------------------------------------
void __GK_GetNewClip(struct GkWinRsc *gkwin)
{
struct ClipRect *redraw; //visible_clip-visible_bak多出的部分
struct ClipRect *res; //visible_clip与visible_bak相交的clip
if(gkwin->visible_bak != NULL)
{
__GK_ClipLinkSub(gkwin->visible_clip,gkwin->visible_bak,&res,&redraw);
__GK_ClipLinkConnect(&gkwin->redraw_clip,redraw);
gkwin->visible_clip = res;
if(gkwin->WinProperty.DestBlend == CN_GKWIN_DEST_VISIBLE)
{
__GK_ClipLinkSub(gkwin->visible_bak,gkwin->visible_clip,
&res,&redraw);
gkwin->visible_bak = redraw;
__GK_FreeClipQueue(res);
}
else
{
gkwin->visible_bak = __GK_FreeClipQueue(gkwin->visible_bak);
}
}
else
{
__GK_ClipLinkConnect(&gkwin->redraw_clip,gkwin->visible_clip);
gkwin->visible_clip = NULL;
}
}
//----提取剪切域队列重叠部分---------------------------------------------------
//功能: 提取src队列中的所有矩形与sub队列中重叠的部分，用ins参数返回；
// src中非重叠的部分也形成新的剪切域队列，从different返回。
//参数: src，被减的队列指针，执行后，本队列将被释放或转移
// sub，减数队列指针
// ins，src与sub相交的部分
// different，src与sub不相交的部分
//返回: 无
//-----------------------------------------------------------------------------
void __GK_ClipLinkSub(struct tagClipRect *src,struct tagClipRect *sub,
struct tagClipRect **ins,struct tagClipRect **different)
{
struct tagClipRect *difftemp = NULL; //不重叠的部分暂存
struct tagClipRect *worksrc; //src中矩形被减产生的工作子队列
struct tagClipRect *LoopSrc;
struct tagClipRect *EndLoop;
struct tagClipRect *workloop; //工作子队列的循环遍历指针
struct tagClipRect *subloop; //减数队列的循环遍历指针
struct tagClipRect *clip_ints=NULL; //用于收集重叠的区域
struct tagClipRect *temp1; //临时变量
struct tagRectangle ints_rect,src_rect;
bool_t EndSub;
ufast_t uftemp;
//减数队列为空
if(sub == NULL)
{ //被减数队列为空
if(src == NULL)
{//src与sub相交、不相交的部分都为空
*ins = NULL;
*different = NULL;
return;
}else
{//src与sub相交部分为空、不相交的部分为src
*ins = NULL;
*different = src;
return;
}
}else //减数队列不为空
{ //被减数队列为空
if(src == NULL)
{//src与sub相交、不相交的部分都为空
*ins = NULL;
*different = NULL;//
// *different = sub;
return;
}
}
//被减数队列、减数队列都不为空
LoopSrc = src;
do{
worksrc = LoopSrc;
LoopSrc = LoopSrc->next;
worksrc->next = worksrc;
worksrc->previous = worksrc;
subloop = sub;
do{
workloop = worksrc;
EndLoop = worksrc->previous;
EndSub = false;
//此处用循环是必要的，减sub中第一个矩形时worksrc只有一个矩形，可
//以不用循环来处理，但减第二个矩形时，worksrc可能分裂成一个队列。
do
{
if(__GK_GetRectInts(&workloop->rect,&subloop->rect,&ints_rect))
{//矩形相交
temp1 = (struct tagClipRect *)Mb_Malloc(g_ptClipRectPool,0);
temp1->rect = ints_rect;
//把相交区域加入clip_ints
__GK_ClipConnect(&clip_ints,temp1);
src_rect = workloop->rect;
uftemp = 0;
//以下提取workloop中与subloop中不相交的部分，直接替代src队列
//中workloop的位置
if(subloop->rect.top > src_rect.top) //上部矩形
{ //首个矩形，覆盖原结点
workloop->rect.bottom = subloop->rect.top;
workloop = workloop->next;
uftemp++;
}
if(subloop->rect.left > src_rect.left) //左部矩形
{ //首个矩形，覆盖原结点
if(uftemp == 0)
{
workloop->rect.right = subloop->rect.left;
if(src_rect.bottom < subloop->rect.bottom)
workloop->rect.bottom = src_rect.bottom;
else
workloop->rect.bottom = subloop->rect.bottom;
workloop = workloop->next;
}else
{
temp1 =
(struct tagClipRect *)Mb_Malloc(g_ptClipRectPool,0);
temp1->rect.left = src_rect.left;
temp1->rect.top = subloop->rect.top;
temp1->rect.right = subloop->rect.left;
if(src_rect.bottom < subloop->rect.bottom)
temp1->rect.bottom = src_rect.bottom;
else
temp1->rect.bottom = subloop->rect.bottom;
__GK_ClipConnect(&workloop,temp1);
}
uftemp++;
}
if(subloop->rect.right < src_rect.right) //右部矩形
{ //首个矩形，覆盖原结点
if(uftemp == 0)
{
workloop->rect.left = subloop->rect.right;
if(src_rect.bottom < subloop->rect.bottom)
workloop->rect.bottom = src_rect.bottom;
else
workloop->rect.bottom = subloop->rect.bottom;
workloop = workloop->next;
}else
{
temp1 =
(struct tagClipRect *)Mb_Malloc(g_ptClipRectPool,0);
temp1->rect.left = subloop->rect.right;
if(src_rect.top < subloop->rect.top)
temp1->rect.top = subloop->rect.top;
else
temp1->rect.top = src_rect.top;
temp1->rect.right = src_rect.right;
if(src_rect.bottom < subloop->rect.bottom)
temp1->rect.bottom = src_rect.bottom;
else
temp1->rect.bottom = subloop->rect.bottom;
__GK_ClipConnect(&workloop,temp1);
}
uftemp++;
}
if(subloop->rect.bottom < src_rect.bottom) //下部矩形
{ //首个矩形，覆盖原结点
if(uftemp == 0)
{
workloop->rect.top = subloop->rect.bottom;
workloop = workloop->next;
}else
{
temp1 =
(struct tagClipRect *)Mb_Malloc(g_ptClipRectPool,0);
temp1->rect.left = src_rect.left;
temp1->rect.top = subloop->rect.bottom;
temp1->rect.right = src_rect.right;
temp1->rect.bottom = src_rect.bottom;
__GK_ClipConnect(&workloop,temp1);
}
uftemp++;
}
if(uftemp == 0) //源矩形被完全覆盖,
{
if(worksrc->next == worksrc) //源队列只有一个矩形
{
Mb_Free(g_ptClipRectPool,worksrc);
worksrc = NULL;
// workloop = NULL;
EndSub = true;
}else
{
temp1 = workloop;
workloop = workloop->next;
temp1->previous->next = workloop;
workloop->previous = temp1->previous;
if(worksrc == temp1)
worksrc = workloop;
if(EndLoop == temp1)
EndSub = true;
Mb_Free(g_ptClipRectPool,temp1);
}
}
else
{
workloop = workloop->next;
}
}
else //矩形不相交
{
workloop = workloop->next;
}
if(workloop->previous == EndLoop)
EndSub = true;
}while(EndSub == false);
if(worksrc == NULL)
break;
subloop = subloop->next;
}while(subloop != sub);
__GK_ClipLinkConnect(&difftemp,worksrc);
}while(src != LoopSrc);
*different = difftemp;
*ins = clip_ints;
}
//----生成重绘区域-------------------------------------------------------------
//功能: 扫描整个窗口链表，重新生成全部窗口的可视域,以及待重绘的clip，方法和过程:
// 1、释放所有的visible_bak，把visible_clip转到visible_bak中。
// 2、重新生成所有win的visible_clip，并复制到 copy_clip 中临时保存。
// 3、visible_clip减去中visible_bak所得加入redraw_clip队列。剩余部分保留在
// visible_clip中。如果窗口的dest_blend == true，则visible_bak中保存
// 由可见变为不可见的部分，否则visible_bak将被释放。
// 4、从changed msk中提取changed_clip。
// 5、取visible_clip与changed_clip的交集，加入redraw_clip队列。
// 6、从z_top起，取visible_bak,扫描其后窗口的可视域，与其重叠的部分，加入
// redraw域。符合此条件的visible_bak，必定是因为窗口移开所致。
// 7、从z_top起，对dest_blend == true的win，扫描z轴中在其后面的
// win的visible_clip，与其需重绘部分重叠的，加入redraw_clip队列。
// 此后dest_blend != true的win的visible_clip可释放。
// 8、合并前几步产生的redraw_clip队列。
// 9、从z_top起，对任一dest_blend == true的win的visible_clip，扫描z轴中在其
// 后面的win的redraw_clip，重叠的部分加入redraw_clip队列，并合并之。
//参数: display，被扫描的显示器
//返回: false=失败，一般是因为剪切域池容量不够
//-----------------------------------------------------------------------------
bool_t __GK_GetRedrawClipAll(struct tagDisplayRsc *display)
{
struct tagGkWinRsc *tempwin;
struct tagGkWinRsc *special_win;
struct tagClipRect *changed_clip,*tempclip1;
if(display->reset_clip == true) //看是否需要重新生成可视域
{
if(__GK_GetVisibleClip(display) == false) //完成step1、step2、step3
return false;
display->reset_clip = false;
}
tempwin = display->desktop;
while(1)
{ //扫描desktop到z_topmost之间的全部窗口，完成step4~5，在desktop后面的
//窗口不显示，或者在step1~3中已经全部转移到 redraw_clip 中，无需处理。
if(tempwin->visible_clip != NULL)
{
//备份visible_clip
if(tempwin->copy_clip == NULL) //copy_clip可能已经在step1~3中设置了
tempwin->copy_clip = __GK_CopyClipLink(tempwin->visible_clip);
//整个窗口全部被修改，整体绘制、窗口移动、拉伸、压缩会导致全体修改
//reset_clip == true成立的话，cn_gkwin_change_all的情况在
//__gk_get_visible_clip函数中已经完成，在该函数中完成，可以减轻不少
//运算量，而且对这里没有影响。
if(tempwin->change_flag == CN_GKWIN_CHANGE_ALL)
{
//全部可视域需重绘
__GK_ClipLinkConnect(&tempwin->redraw_clip,
tempwin->visible_clip);
tempwin->visible_clip = NULL; //可视域已经全部加入重绘域
tempwin->change_flag = CN_GKWIN_CHANGE_NONE;
}else
{ //有部分修改
if(tempwin->change_flag == CN_GKWIN_CHANGE_PART)
{
//取得修改域
changed_clip = __GK_GetChangedClip(tempwin);
//提取可视域中修改的区域
tempclip1 = __GK_GetClipLinkInts(
&tempwin->visible_clip,changed_clip);
__GK_FreeClipQueue(changed_clip);
//把修改区域加入到redraw_clip中
__GK_ClipLinkConnect(&tempwin->redraw_clip,tempclip1);
tempwin->change_flag = CN_GKWIN_CHANGE_NONE;
}
}
// tempwin->visible_bak = NULL;
}
else
tempwin->change_flag = CN_GKWIN_CHANGE_NONE;
//清除changed_msk
__GK_ShadingClear(tempwin);
if(tempwin != display->z_topmost)
tempwin = tempwin->z_top;
else
break;
}
//执行step6，改变位置的、dest_blend=true的窗口，改变前遮挡的其他窗口的
//可视域，加入redraw域。
special_win = display->z_topmost;
while(1)
{
//窗口移动，伸缩会导致visible_bak != NULL
if((special_win->dest_blend) && (special_win->visible_bak != NULL))
{
tempwin = special_win->z_back;
while(1)
{
// tempclip2 = __GK_CopyClipLink(special_win->visible_bak);
//取得背景窗口需要重绘的区域
tempclip1 =
__GK_GetClipLinkInts(&tempwin->visible_clip,
special_win->visible_bak);
// __GK_FreeClipQueue(tempclip2);
//把修改区域加入到背景窗口redraw_clip中
__GK_ClipLinkConnect(&tempwin->redraw_clip,tempclip1);
if(tempwin != display->desktop)
tempwin = tempwin->z_back;
else
break;
}
special_win->visible_bak = __GK_FreeClipQueue(special_win->visible_bak);
}
if(special_win != display->desktop)
special_win = special_win->z_back;
else
break;
}
//执行step7，窗口需要背景参与运算，此窗口内容有改变
special_win = display->z_topmost;
while(1)
{ //hjj,step7和step9存在先后执行的情况，调用__gk_get_cliplink_ints_res
//会对参数有影响(可能导致参数值改变)，使用时应多做考虑
if(special_win->dest_blend)
{//special_win需要背景参与运算才执行下面的程序
if(special_win->redraw_clip != NULL)
{
tempwin = special_win->z_back;
while(1)
{
//取得背景窗口需要重绘的区域
tempclip1 =
__GK_GetClipLinkInts(&tempwin->visible_clip,
special_win->redraw_clip);
//把修改区域加入到背景窗口redraw_clip中
__GK_ClipLinkConnect(&tempwin->redraw_clip,tempclip1);
if(tempwin != display->desktop)
tempwin = tempwin->z_back;
else
break;
}
}
}
else
{//释放掉不需要背景参与运算的窗口的可视域
special_win->visible_clip =
__GK_FreeClipQueue(special_win->visible_clip);
}
if(special_win != display->desktop)
special_win = special_win->z_back;
else
break;
}
//执行step8，合并前几步产生的redraw_clip队列
tempwin = display->z_topmost;
while(1)
{
//合并redraw_clip
tempwin->redraw_clip = __GK_CombineClip(tempwin->redraw_clip);
if(tempwin != display->desktop)
tempwin = tempwin->z_back;
else
break;
}
//执行step9，本步骤无须判断desktop，故循环体有所不同
//需要背景参与运算的窗口，其背景改变
special_win = display->z_topmost;
do{
if((special_win->dest_blend)&&(special_win->visible_clip != NULL))
{//special_win需要背景窗口参与运算，才执行下面的程序
tempwin = special_win;
do{
tempwin = tempwin->z_back;
//取得背景窗口的修改域
tempclip1 =
__GK_GetClipLinkInts(&special_win->visible_clip,
tempwin->redraw_clip);
//把修改区域加入到窗口的redraw_clip中
__GK_ClipLinkConnect(&special_win->redraw_clip,tempclip1);
}while(tempwin != display->desktop);
//释放掉不需要使用的区域
special_win->visible_clip =
__GK_FreeClipQueue(special_win->visible_clip);
//合并redraw_clip
special_win->redraw_clip =
__GK_CombineClip(special_win->redraw_clip);
}
special_win = special_win->z_back;
}while(special_win != display->desktop);
//恢复visible_clip
tempwin = display->z_topmost;
while(1)
{
tempwin->visible_clip = tempwin->copy_clip;
tempwin->copy_clip = NULL;
if(tempwin != display->desktop)
tempwin = tempwin->z_back;
else
break;
}
return true;
}