Re: [webkit-dev] Box shadow

[Michael Catanzaro]

On Thu, Sep 28, 2017 at 7:41 AM, Nagendra K  
wrote:

Hi,
I am using a WebKit which is of 2010 on my embedded device, now I 
want to upgrade the WebKit, the platform supports opengl es 1.x for 
rendering. I want to first test some basic new features like box 
shadow, so want to know if opengles1.x is sufficient to render 
box-shadow feature.


Nagendra,

You've asked this question many, many times and the answer has always 
been that OpenGLES 2.0 is the lowest-supported version of OpenGLES.


Michael

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Re: [webkit-dev] Box shadow

[Mike Reed]

Gotcha. Perhaps in the future we can push that
implementation-necessity down to the porting layer, rather than
forcing that detail to be in the portable layer.

Again, I'm just looking for a way to have round-rects look antialiased
(and therefore not clipped).

On 1/9/07, David Hyatt [EMAIL PROTECTED] wrote:

The problem I ran into with box-shadow is that the shadow cannot show
up anywhere within the contents of the box.  It has to be clipped
out.  Maybe there's a clever way to get the same result that I'm not
thinking of though.   Note that CG draws shadows in response to other
drawing operations (in this case a fill).  As far as I can tell with
CG, I can't just draw a shadow in a vacuum.  It has to be implicitly
cast by some other drawing operation.  So I'm basically doing a fill,
which casts the shadow, and then ensuring that the entire fill is
clipped out so that it isn't seen.

dave

On Jan 9, 2007, at 7:04 AM, Mike Reed wrote:

 Do we need to use clips for round-rects? In my implementation these
 are always hard-edged (no antialiasing). Is that true for Qt as well?
 CG? I would prefer being asked to draw round-rects (filled or stroked)
 directly with no clipping...

 On 1/8/07, David Hyatt [EMAIL PROTECTED] wrote:
 I just landed support for the CSS3 box-shadow property.  This
 entailed adding a few new methods to GraphicsContext.  I stubbed
 these methods out on Qt but did not implement them.

 They are:

 void clipOut(const IntRect);
 Excludes the specified rect from the clipping region.

 void clipOutEllipseInRect(const IntRect);
 Same, but for an ellipse drawn inside the specified rect.

 void fillRoundedRect(const IntRect, const IntSize topLeft, const
 IntSize topRight, const IntSize bottomLeft, const IntSize
 bottomRight, const Color);
  Fills a rounded rect (with elliptical curvature in the four
 corners) with the specified color.

 Note that the fillRoundedRect method arguably should be cross-
 platform, relying on primitives instead.   This is an area for
 improvement, if someone wants to rework it to use the cross-platform
 Path class etc.

 dave
 ([EMAIL PROTECTED])

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Re: [webkit-dev] Box shadow

[Allan Sandfeld Jensen]

On Tuesday 09 January 2007 16:04, Mike Reed wrote:
 Do we need to use clips for round-rects? In my implementation these
 are always hard-edged (no antialiasing). Is that true for Qt as well?
 CG? I would prefer being asked to draw round-rects (filled or stroked)
 directly with no clipping...

The rounded borders also clip the background. In fact you can have rounded 
border with no border, just clipping the background image or color.

`Allan
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