//----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;
}
}
//----获取被修改区域-----------------------------------------------------------
//功能: 获取一个窗口的被修改部分的剪切域，形成双向循环链表，链表中的clip以先
// 左->右，再上->下的顺序排列，并清零changed_msk数组。
//参数: gkwin，目标窗口
//返回: 链表指针，NULL表示窗口未被修改
//-----------------------------------------------------------------------------
struct tagClipRect *__GK_GetChangedClip(struct tagGkWinRsc *gkwin)
{
struct tagClipRect *clip=NULL,*clip1,*tempclip,*clip_head = NULL;
u8 *msk;
u32 offset_bit,offset,msk_line_words;
s16 loopx,loopy;
bool_t start;
s32 width,height;
if(gkwin->change_flag == CN_GKWIN_CHANGE_ALL) //整个窗口均被修改
{
clip = (struct tagClipRect *)Mb_Malloc(g_ptClipRectPool,0);
if(clip != NULL)
{
clip->rect.left = gkwin->limit_left + gkwin->absx0;
clip->rect.top = gkwin->limit_top + gkwin->absy0;
clip->rect.right = gkwin->limit_right + gkwin->absx0;
clip->rect.bottom = gkwin->limit_bottom + gkwin->absy0;
clip->next = clip;
clip->previous = clip;
gkwin->change_flag = CN_GKWIN_CHANGE_NONE;
return clip; //把整个窗口的可显示区域当作一个剪切域返回
}
else
return NULL;
}else if(gkwin->change_flag == CN_GKWIN_CHANGE_NONE) //没有修改
{
return NULL;
}else //部分修改，先按x方向取得剪切域，再按y方向合并
{
offset = 0; //首行字偏移量
msk = gkwin->changed_msk.bm_bits;
width = gkwin->wm_bitmap->width;
height = gkwin->wm_bitmap->height;
msk_line_words = gkwin->changed_msk.linebytes;
for(loopy = 0; loopy < height; loopy +=8)
{
start = false; //开始一段连续的被修改区域
offset_bit = 0; //起始块的位偏移
for(loopx = 0; loopx < width; loopx+=8)
{
if(msk[offset+offset_bit/8]&(u8)(1<<(8-(offset_bit%8)-1)))
{ //该块的changed flag为true。
if(start == false) //changed block开始被修改
{
start = true;
clip =(struct tagClipRect*)Mb_Malloc(g_ptClipRectPool,0);
if(clip != NULL)
{
clip->rect.left = gkwin->absx0 + offset_bit*8;
clip->rect.top = loopy + gkwin->absy0;
clip->rect.right = clip->rect.left + 8;
clip->rect.bottom = clip->rect.top + 8;
}
else
{
__GK_FreeClipQueue(clip_head);
return NULL;
}
}else //changed block持续
{
clip->rect.right += 8;
}
}else //如果本行的最后一块也是被改写的块，则程序不会走到这里
{
if(start == true) //changed block结束
{
__GK_ClipConnect(&clip_head,clip);
start = false;
}
}
offset_bit++;
}
//本行最后一块是被改写块，需要在这里把该区域加入被修改区域
if(start == true)
__GK_ClipConnect(&clip_head,clip);
offset += msk_line_words;
}
//至此，x方向条状clip已经生成，现在沿y方向合并
clip = clip_head;
do{
clip1 = clip->next;
while(clip1 != clip)
{
if((clip1->rect.left == clip->rect.left)
&&(clip1->rect.right == clip->rect.right)
&&((clip->rect.bottom)== clip1->rect.top))//可合并
{
clip->rect.bottom += 8;
clip1->previous->next = clip1->next;
clip1->next->previous = clip1->previous;
tempclip = clip1;
clip1 = clip1->next;
Mb_Free(g_ptClipRectPool,tempclip);
}else
clip1 = clip1->next;
}
clip = clip->next;
}while(clip != clip_head);
gkwin->change_flag = CN_GKWIN_CHANGE_NONE;
}
memset(msk,0,msk_line_words * gkwin->changed_msk.height);
return clip_head;
}
//----扫描可视域---------------------------------------------------------------
//功能: 1、把visible_clip备份到visible_bak中。
// 2、所有窗口生成新的visible_clip
//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_ScanNewVisibleClip(struct tagDisplayRsc *display)
{
struct tagGkWinRsc *tempwin;
struct tagRectangle *rect;
struct tagClipRect *clip,*clip1,*clip_head = NULL;
s32 num,rect_left,rect_top,rect_right,rect_bottom,loop,temp;
u8 *sort_array_x,*sort_array_y;
num = (display->width+1)*sizeof(u8) + (display->height+1)*sizeof(u8);
sort_array_x = M_MallocLc(num,0);
if(sort_array_x == NULL)
return false;
sort_array_y = sort_array_x + display->width+1;
memset(sort_array_x,0,num);
tempwin = display->z_topmost;
// rect_left = 0;
// rect_top = 0;
while(1)
{ //取窗口可视边框，该边框是窗口受祖先窗口限制后的矩形
temp = tempwin->limit_left-tempwin->left + tempwin->absx0;
if(sort_array_x[temp] == 0)
{
sort_array_x[temp] = 1;
// rect_left++;
}
temp = tempwin->limit_right-tempwin->left+tempwin->absx0;
if(sort_array_x[temp] == 0)
{
sort_array_x[temp] = 1;
// rect_left++;
}
temp = tempwin->limit_top-tempwin->top + tempwin->absy0;
if(sort_array_y[temp] == 0)
{
sort_array_y[temp] = 1;
// rect_top++;
}
temp = tempwin->limit_bottom-tempwin->top+tempwin->absy0;
if(sort_array_y[temp] == 0)
{
sort_array_y[temp] = 1;
// rect_top++;
}
//执行__GK_GetRedrawClipAll函数注释中的step1
//保存窗口原来的可视域
tempwin->visible_bak = tempwin->visible_clip;
tempwin->visible_clip = NULL;
if(tempwin != display->desktop)
tempwin = tempwin->z_back;
else
break;
}
//处理桌面下的窗口，这些窗口肯定没有可视域
while(1)
{
tempwin = tempwin->z_back;
if(tempwin == display->z_topmost)
break;
tempwin->visible_bak = tempwin->visible_clip;
tempwin->visible_clip = NULL;
}
//按从左到右，从上到下的顺序(顺序不能改变)把所有垂直线、水平线围成的小clip
//串成双向链表，由clip_head做链表头
rect_top = 0;
temp = 0;
for(rect_bottom =1;rect_bottom <= display->height; rect_bottom++)
{
if(sort_array_y[rect_bottom] == 0)
continue;
rect_left = 0;
for(rect_right =1;rect_right <= display->width; rect_right++)
{
if(sort_array_x[rect_right] == 0)
continue;
clip = (struct tagClipRect*)Mb_Malloc(g_ptClipRectPool,0);
if(clip != NULL)
{
clip->rect.left = rect_left;
clip->rect.right = rect_right;
clip->rect.top = rect_top;
clip->rect.bottom = rect_bottom;
rect_left = rect_right;
__GK_ClipConnect(&clip_head,clip); //把小clip加入到链接起来
temp++;
}
else
{
__GK_FreeClipQueue(clip_head);
free(sort_array_x);
return false; //内存池不足，无法生成可视域队列
}
}
rect_top = rect_bottom;
}
free(sort_array_x);
//下面判断小clip的归属，并把他们加入到所属win的new_clip队列中
tempwin = display->z_topmost;
while(1)
{
clip = clip_head;
for(loop = temp; loop >0; loop--)
{
rect = &(clip->rect);
if((rect->left>=tempwin->limit_left-tempwin->left+tempwin->absx0)
&&(rect->top>=tempwin->limit_top-tempwin->top+tempwin->absy0)
&&(rect->right<=tempwin->limit_right-tempwin->left+tempwin->absx0)
&&(rect->bottom<=tempwin->limit_bottom-tempwin->top+tempwin->absy0))
{ //矩形在tempwin的可显示范围内,若不在则无需处理
//允许alpha或透明，区域将加入窗口可视域，但不从临时链表中删除。
if(tempwin->dest_blend)
{
clip1 = (struct tagClipRect*)Mb_Malloc(g_ptClipRectPool,0);
if(clip1 != NULL)
{
*clip1 = *clip;
}
else
{
__GK_FreeClipQueue(clip_head);
return false; //内存池不足，无法生成可视域队列
}
}else //不允许透明和alpha，区域加入窗口可视域，从临时链表删除
{
if(clip == clip_head)
clip_head = clip_head->next;
clip1 = clip;
clip->previous->next = clip->next;
clip->next->previous = clip->previous;
temp--;
}
clip = clip->next;
//把小clip加入到visible_clip队列中
__GK_ClipConnect(&tempwin->visible_clip,clip1);
}else //矩形不在tpwin的可显示范围内，无需处理。
{
clip = clip->next;
}
}
__GK_CombineClip_s(tempwin->visible_clip);//合并clip,按先x后y的顺序合并
if(tempwin != display->desktop)
tempwin = tempwin->z_back;
else
break;
}
return true;
}
//----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;
}
