static int __GraphLayer_GetLayers( LCUI_GraphLayer *root_glayer, LCUI_GraphLayer *glayer, LCUI_Rect rect, LCUI_Queue *queue ) { int i, total; LCUI_Pos pos; LCUI_Rect tmp; LCUI_GraphLayer *child; LCUI_Queue *child_list; if( !glayer ) { //_DEBUG_MSG("!glayer\n"); return -1; } if( !glayer->visible ) { //_DEBUG_MSG("!glayer_visible\n"); return 1; } child_list = &glayer->child; /* 从底到顶遍历子部件 */ total = Queue_GetTotal( child_list ); //_DEBUG_MSG( "root: %p, cur: %p, child total: %d\n", // root_glayer, glayer, total ); /* 从尾到首,从底到顶,遍历图层 */ for( i=total-1; i>=0; --i ) { child = (LCUI_GraphLayer*)Queue_Get( child_list, i ); /* 忽略无效或不可见的图层 */ if( !child || !child->visible ) { continue; } /* 获取子图层的有效区域及全局坐标 */ tmp = GraphLayer_GetValidRect( root_glayer, child ); pos = GraphLayer_GetGlobalPos( root_glayer, child ); //_DEBUG_MSG( "child: %p, pos: %d,%d, valid rect: %d,%d, %d, %d\n", // child, pos.x, pos.y, tmp.x, tmp.y, tmp.width, tmp.height); //Graph_PrintInfo( &child->graph ); /* 有效区域加上子部件的全局坐标 */ tmp.x += pos.x; tmp.y += pos.y; /* 判断区域是否有效 */ if( !LCUIRect_IsValid(tmp) ) { continue; } /* 若该有效区域与目标区域重叠,则记录子部件,并进行递归 */ if( LCUIRect_Overlay(tmp, rect) ) { Queue_AddPointer( queue, child ); __GraphLayer_GetLayers( root_glayer, child, rect, queue ); } } return 0; }
LCUI_API LCUI_Pos GraphLayer_GetGlobalPos( LCUI_GraphLayer *root_glayer, LCUI_GraphLayer *glayer ) { LCUI_Pos pos; if( !glayer || !root_glayer || glayer == root_glayer ) { return Pos(0,0); } /* 递归获取父图层的全局坐标 */ pos = GraphLayer_GetGlobalPos( root_glayer, glayer->parent ); pos.x += glayer->pos.x; pos.y += glayer->pos.y; if( glayer->parent ) { /* 加上内边距 */ pos.x += glayer->parent->padding.left; pos.y += glayer->parent->padding.top; } return pos; }
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; } if( !Graph_IsValid(graph_buff) ) { graph_buff->color_type = COLOR_TYPE_ARGB; Graph_Create( graph_buff, rect.width, rect.height ); } Graph_Init( &tmp_graph ); Queue_Init( &glayerQ, 0, NULL); Queue_UsingPointer( &glayerQ ); /* 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; } /* 跳过有alpha通道的图层 */ if( glayer->graph.color_type == COLOR_TYPE_ARGB ) { continue; } /* 如果该图层的有效区域包含目标区域 */ if( rect.x >= valid_area.x && rect.y >= valid_area.y && rect.x + rect.w <= valid_area.x + valid_area.w && rect.y + rect.h <= valid_area.y + valid_area.h ) { /* 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 && ctnr ) { 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; } DEBUG_MSG("%d,%d,%d,%d\n", glayer->pos.x, glayer->pos.y, glayer->graph.w, glayer->graph.h); /* 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; } } Queue_Destroy( &glayerQ ); return 0; }