[webkit-dev] Proposal: Remove TextureMapperImageBuffer

Benjamin Poulain benjamin at webkit.org
Thu Apr 23 13:15:50 PDT 2015

It seems undesirable to use a completely different stack for testing and 
for shipping.

Wouldn't it be possible to use Mesa on the EFL bots?

On 4/23/15 12:10 PM, Martin Robinson wrote:
> A slight update on this issue. It's already been attempted here:
> https://bugs.webkit.org/show_bug.cgi?id=143561
> The issue is that WebKitEFL is using the TextureMapperImageBuffer to
> run tests on their bots, because the EFL bots don't support OpenGL
> tests. My suggestion is that we disable accelerated compositing
> completely for WebKitEFL (if possible) and skip those tests. Once the
> bots have the ability to run tests that use OpenGL, we can re-enable
> that code path for WebKitEFL.
> --Martin
> On Thu, Apr 23, 2015 at 11:12 AM, Martin Robinson <mrobinson at webkit.org> wrote:
>> Background: There currently exists a fallback TextureMapper
>> implementation that does not use OpenGL to composite and project
>> layers, but instead relies on 2D rasterization. This does not work
>> correctly for Cairo, since Cairo only supports affine transformations.
>> I believe this path is only used by GTK+ (and perhaps WinCairo) now.
>> Proposal: I would like to remove TextureMapperImageBuffer and make
>> TextureMapperGL the only implementation of TextureMapper. Not only
>> will this simplify the code, it will remove a build flag
>> (TEXTURE_MAPPER_GL). The current path isn't (or really shouldn't) be
>> enabled by default.
>> Please speak up if you are opposed. :)
>> --Martin
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