/* 将矩形数据追加至队列 */
static int
RectQueue_Add( LCUI_Queue* queue, LCUI_Rect rect )
{
int i, flag = 0;
LCUI_Rect *rect_ptr, *cur_rect_ptr;
LCUI_Queue rect_buff;
if( rect.width <= 0 || rect.height <= 0 ) {
return -1;
}
DEBUG_MSG("add new rect: %d,%d,%d,%d, current total: %d\n",
rect.x, rect.y, rect.width, rect.height, queue->total_num);
Queue_Init( &rect_buff, sizeof(LCUI_Rect), NULL );
for (i=0; i<queue->total_num; ++i) {
cur_rect_ptr = (LCUI_Rect*)Queue_Get( queue, i );
if( !cur_rect_ptr ) {
break;
}
DEBUG_MSG("[%d] rect: %d,%d,%d,%d\n", i,
cur_rect_ptr->x, cur_rect_ptr->y,
cur_rect_ptr->width, cur_rect_ptr->height);
/* 如果矩形无效，或者被新增的矩形区域包含，则删除 */
if ( cur_rect_ptr->width <= 0 || cur_rect_ptr->height <= 0
|| LCUIRect_IncludeRect( rect, *cur_rect_ptr) ) {
Queue_Delete ( queue, i );
continue;
}
/* 如果与现有的矩形相同，或被现有的矩形包含 */
if( LCUIRect_Equal( rect, *cur_rect_ptr)
|| LCUIRect_IncludeRect( *cur_rect_ptr, rect ) ) {
flag = 1;
break;
}
/* 如果新增的矩形与队列中的矩形不重叠 */
if( !LCUIRect_Overlay(rect, *cur_rect_ptr) ) {
continue;
}
continue; // 暂时不对相交的矩形进行分割
DEBUG_MSG("[%d] rect overlay, start cut\n", i);
/* 根据当前区域，分割新区域 */
LCUIRect_Cut( *cur_rect_ptr, rect, &rect_buff );
for( i=0; i<rect_buff.total_num; ++i ) {
rect_ptr = (LCUI_Rect*)Queue_Get( &rect_buff, i );
if( !rect_ptr ) {
break;
}
DEBUG_MSG("[%d] add child rect: %d,%d,%d,%d\n", i,
rect_ptr->x, rect_ptr->y,
rect_ptr->width, rect_ptr->height);
RectQueue_Add( queue, *rect_ptr );
}
flag = 1;
break;
}
/* 销毁队列 */
Queue_Destroy( &rect_buff );
if ( flag == 0 ) {
return Queue_Add( queue, &rect );
}
return -1;
}
LCUI_API int GraphLayer_GetGraph( LCUI_GraphLayer *ctnr,
LCUI_Graph *graph_buff,
LCUI_Rect rect )
{
int i, total;
uchar_t tmp_alpha, alpha;
LCUI_Pos pos, glayer_pos;
LCUI_GraphLayer *glayer;
LCUI_Queue glayerQ;
LCUI_Rect valid_area;
LCUI_Graph tmp_graph;
/* 检测这个区域是否有效 */
if (rect.x < 0 || rect.y < 0) {
return -1;
}
if (rect.x + rect.width > ctnr->graph.w
|| rect.y + rect.height > ctnr->graph.h ) {
return -1;
}
if (rect.width <= 0 || rect.height <= 0) {
return -2;
}
Graph_Init( &tmp_graph );
Queue_Init( &glayerQ, 0, NULL);
Queue_UsingPointer( &glayerQ );
graph_buff->color_type = COLOR_TYPE_RGB;
/* 为graph_buff分配合适尺寸的内存空间 */
Graph_Create( graph_buff, rect.width, rect.height );
/* 获取rect区域内的图层列表 */
GraphLayer_GetLayers( ctnr, rect, &glayerQ );
total = Queue_GetTotal( &glayerQ );
//_DEBUG_MSG( "total: %d\n", total );
/* 若记录数为零，则表明该区域没有图层 */
if( total <= 0 ) {
/* 若没有父图层，则填充白色 */
if( ctnr == NULL ) {
Graph_FillColor( graph_buff, RGB(255,255,255) );
} else { /* 否则使用父图层的图形 */
Graph_Cut( &ctnr->graph, rect, graph_buff );
}
/* 销毁记录 */
Queue_Destroy( &glayerQ );
return 0;
}
/* 从顶层到底层遍历图层，排除被其它图层完全遮挡或者自身完全透明的图层 */
for(i=total-1; i>=0; --i) {
glayer = (LCUI_GraphLayer*)Queue_Get( &glayerQ, i );
valid_area = GraphLayer_GetValidRect( ctnr, glayer );
glayer_pos = GraphLayer_GetGlobalPos( ctnr, glayer );
valid_area.x += glayer_pos.x;
valid_area.y += glayer_pos.y;
alpha = GraphLayer_GetRealAlpha( glayer );
/* 当前图层的透明度小于255的话，就跳过 */
if( alpha < 255 ) {
continue;
}
/* 如果色彩类型为RGB，没有alpha通道 */
if( glayer->graph.color_type == COLOR_TYPE_RGB ) {
/* 如果该图层的有效区域包含目标区域 */
if( LCUIRect_IncludeRect(valid_area, rect) ) {
/* 移除底层的图层，因为已经被完全遮挡 */
for(total=i-1;total>=0; --total) {
Queue_DeletePointer( &glayerQ, 0 );
}
goto skip_loop;
}
}
}
skip_loop:
total = Queue_GetTotal( &glayerQ );
//_DEBUG_MSG( "total: %d\n", total );
if(i <= 0) {
if( ctnr == NULL ) {
Graph_FillColor( graph_buff, RGB(255,255,255) );
} else {
Graph_Cut ( &ctnr->graph, rect, graph_buff );
}
}
/* 获取图层列表中的图层 */
for(i=0; i<total; ++i) {
glayer = (LCUI_GraphLayer*)Queue_Get( &glayerQ, i );
//_DEBUG_MSG("%p = Queue_Get( %p, %d )\n", glayer, &glayerQ, i);
if( !glayer ) {
continue;
}
/* 锁上该图层的互斥锁 */
Graph_Lock( &glayer->graph );
/* 获取该图层的有效区域及全局坐标 */
pos = GraphLayer_GetGlobalPos( ctnr, glayer );
valid_area = GraphLayer_GetValidRect( ctnr, glayer );
/* 引用该图层的有效区域内的图像 */
Graph_Quote( &tmp_graph, &glayer->graph, valid_area );
//_DEBUG_MSG("valid area: %d,%d,%d,%d, pos: %d,%d, size: %d,%d\n",
// valid_area.x, valid_area.y, valid_area.width, valid_area.height,
// pos.x, pos.y, glayer->graph.w, glayer->graph.h
// );
/* 获取相对坐标 */
pos.x = pos.x - rect.x + valid_area.x;
pos.y = pos.y - rect.y + valid_area.y;
//_DEBUG_MSG("mix pos: %d,%d\n", pos.x, pos.y);
/* 如果该图层没有继承父图层的透明度 */
if( !glayer->inherit_alpha ) {
/* 直接叠加至graph_buff */
Graph_Mix( graph_buff, &tmp_graph, pos );
} else {
/* 否则，计算该图层应有的透明度 */
alpha = GraphLayer_GetRealAlpha( glayer );
/* 备份该图层的全局透明度 */
tmp_alpha = glayer->graph.alpha;
/* 将实际透明度作为全局透明度，参与图像叠加 */
glayer->graph.alpha = alpha;
Graph_Mix( graph_buff, &tmp_graph, pos );
/* 还原全局透明度 */
glayer->graph.alpha = tmp_alpha;
}
/* 解锁图层 */
Graph_Unlock( &glayer->graph );
}
Queue_Destroy( &glayerQ );
return 0;
}
