void Graph_ClearShadowArea( LCUI_PaintContext paint, LCUI_Rect *box,
LCUI_BoxShadow *shadow )
{
int i;
LCUI_Graph canvas;
LCUI_Rect rect, box_area, rects[4];
rect.w = box->w;
rect.h = box->h;
rect.x = rect.y = 0;
/* 获取内容框区域 */
box_area.x = box->x + BoxShadow_GetBoxX( shadow );
box_area.y = box->y + BoxShadow_GetBoxY( shadow );
box_area.w = BoxShadow_GetBoxWidth( shadow, box->w );
box_area.h = BoxShadow_GetBoxHeight( shadow, box->h );
/* 获取内容框外的阴影区域 */
LCUIRect_CutFourRect( &box_area, &rect, rects );
for( i=0; i<4; ++i ) {
if( LCUIRect_GetOverlayRect( &paint->rect, &rects[i], &rects[i] ) ) {
rects[i].x -= paint->rect.x;
rects[i].y -= paint->rect.y;
Graph_Quote( &canvas, &paint->canvas, &rects[i] );
Graph_FillRect( &canvas, ARGB(0,0,0,0), NULL, TRUE );
}
}
}
static void Graph_DrawInnerShadow( LCUI_PaintContext paint, LCUI_Rect *box,
LCUI_BoxShadow *shadow )
{
int i;
LCUI_Graph canvas;
LCUI_Rect rsd, rb, rects[4];
rb.x = BoxShadow_GetBoxX( shadow );
rb.y = BoxShadow_GetBoxY( shadow );
rb.w = BoxShadow_GetBoxWidth( shadow, box->w );
rb.h = BoxShadow_GetBoxHeight( shadow, box->h );
rsd.x = BoxShadow_GetX( shadow ) + BLUR_WIDTH(shadow);
rsd.y = BoxShadow_GetY( shadow ) + BLUR_WIDTH(shadow);
rsd.w = rb.w + INNER_SHADOW_WIDTH(shadow)*2;
rsd.h = rb.h + INNER_SHADOW_WIDTH(shadow)*2;
/* 截取出与内容区重叠的区域 */
if( LCUIRect_GetOverlayRect(&rb, &rsd, &rb) ) {
LCUIRect_CutFourRect( &rb, &rsd, rects );
/* 从阴影区域中排除部件占用的区域 */
for( i=0; i<4; ++i ) {
if( !LCUIRect_GetOverlayRect(
&paint->rect, &rects[i],&rects[i]) ) {
continue;
}
rects[i].x -= paint->rect.x;
rects[i].y -= paint->rect.y;
Graph_Quote( &canvas, &paint->canvas, &rects[i] );
Graph_FillColor( &canvas, shadow->color );
}
return;
}
/* 不重叠则直接填充 */
if( LCUIRect_GetOverlayRect(&paint->rect, &rsd, &rb) ) {
rb.x -= paint->rect.x;
rb.y -= paint->rect.y;
Graph_Quote( &canvas, &paint->canvas, &rb );
Graph_FillColor( &canvas, shadow->color );
}
}
