dropshadow

问题 Is it possible to blend only the drop-shadow of an element with the color of the element it is overlapping? For example: I have one element overlapping the other. The element on top has a light-grey drop shadow. The element below is black. I don't want any blend applied to either of the elements themselves but want the drop-shadow of the overlapping element to blend with color of the element below, creating a darker grey where the shadow falls on the overlapped element. If I wanted to apply

问题 Is it possible to blend only the drop-shadow of an element with the color of the element it is overlapping? For example: I have one element overlapping the other. The element on top has a light-grey drop shadow. The element below is black. I don't want any blend applied to either of the elements themselves but want the drop-shadow of the overlapping element to blend with color of the element below, creating a darker grey where the shadow falls on the overlapped element. If I wanted to apply

问题 I am looking for a way to add a drop shadow to an image using PHP. Before you answer or vote to close: I am not looking to do this using CSS or HTML. I want to generate an image file. This is not a duplicate of this question nor this one. I am looking for a very specific effect . For example, given this input image: I want to produce the following image: TL;DR: This image above was generated using Photoshop's Drop Shadow effect. I want a look very similar to that. For reference, here's the

问题 I have the below menu style layout that mimics facebook. I would like to have a dropshadow on the left side like below however the code I am using with layer shadows makes the application LAGGY. I have not been able to find a good alternative solution. Does anyone have an alternative for creating a dropshadow that does not affect application performance? [self.navController.view.layer setShadowOffset:CGSizeMake(0, 1)]; [self.navController.view.layer setShadowColor:[[UIColor darkGrayColor]

问题 Assuming client compatibility, is there any situation where CSS box-shadow is preferable to filter: drop-shadow . From the article it seems like drop-shadow is a HW accelerated superset of box-shadow . This means that we should basically always use drop-shadow instead of box-shadow ? 回答1: There is only one difference between box-shadow and filter: drop-shadow . With box-shadow you can use inset shadows , but you can't do it with filter: drop-shadow . All depended on you. Check this example.

问题 How can i remove the drop shadow of action bar from java code ?. If i remove from the style it is working fine. <style name="MyTheme" parent="Theme.Sherlock"> .... <item name="windowContentOverlay">@null</item> <item name="android:windowContentOverlay">@null</item> .... </style> But i need to remove and add it dynamically from java code. 回答1: There is no way to set value for windowContentOverlay attribute programmatically. But you can define two different themes, one for Activities with a

问题 Wpf dropshadow disappears. Here is how to reproduce. Type the following in xaml pad. <Page.Resources> <DropShadowEffect x:Key="shadow" Opacity="1" ShadowDepth="1" Color="Blue" BlurRadius="30"/> </Page.Resources> <Grid> <Button HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,0,0,0"> <Button.Style> <Style TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Border x:Name="Bd" BorderBrush="Black" BorderThickness="1

问题 I am looking for or trying to implement an algorithm to draw box shadows (as in the CSS 3 specifiction) which accepts the following parameters: Horizontal Offset Vertical Offset Inset Spread Blur Color (Optional: Opacity). Where to start. I have looked for Firefox / Chrome source code to see if I can pull an implementation from there, no such luck! I have looked into linear gradient algorithms, drawing them with a box, which kind of works, except with rounded rectangles it leaves empty pixels

问题 I've observed that applying a DropShadowEffect to a UIElement sporadically causes the UIElement's content to blur a bit. It's a pretty nasty effect: it can cause a photograph to look out of focus or worse- make an entire 'popup' region completely illegible. I haven't seen anyone else complaining about this, so my inclination is to think that there is something that I am doing wrong. Sample use (blurs content at random): <Border> <Border.Effect> <DropShadowEffect /> </Border.Effect> <!--

问题 I've observed that applying a DropShadowEffect to a UIElement sporadically causes the UIElement's content to blur a bit. It's a pretty nasty effect: it can cause a photograph to look out of focus or worse- make an entire 'popup' region completely illegible. I haven't seen anyone else complaining about this, so my inclination is to think that there is something that I am doing wrong. Sample use (blurs content at random): <Border> <Border.Effect> <DropShadowEffect /> </Border.Effect> <!--