[GPU Process] Implement GPU rendering resource cache

[Said Abou-Hallawa]

All the rendering resources, such as ImageFrames, Fonts and ImageBuffers will be cached in the GPU side. Managing this cache will be done by RemoteRenderingBackend and RemoteRenderingBackendProxy. Both of these objects will have a separate objects for maintaining the cached objects. The goal is to have these objects cached once and referenced by their ids multiple times.

[Said Abou-Hallawa]

Created attachment 410571 [details]
Patch

[Said Abou-Hallawa]

Created attachment 410597 [details]
Patch

[Said Abou-Hallawa]

Created attachment 410613 [details]
Patch

[Said Abou-Hallawa]

Created attachment 410617 [details]
Patch

[Myles C. Maxfield]

Comment on attachment 410617 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=410617&action=review

It seems like there will be 3 or 4 patches in here once this is broken up. I'll review those in more detail (just because this one is pretty big).

> Source/WebCore/platform/graphics/GraphicsContext.cpp:795
> +    if (m_impl && image.isPDFDocumentImage())

Why is this relevant?

> Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp:-292
> -    if (m_impl) {
> -        m_impl->drawNativeImage(image, imageSize, destRect, srcRect, options);
> -        return;
> -    }
> -

This is surprising.

[Said Abou-Hallawa]

Created attachment 410738 [details]
Patch

[Said Abou-Hallawa]

Created attachment 410739 [details]
Patch

[Said Abou-Hallawa]

Created attachment 410740 [details]
Patch

[Radar WebKit Bug Importer]

<rdar://problem/70122760>

[Simon Fraser (smfr)]

Is this patch still useful?

[Said Abou-Hallawa]

The attached patch was split and landed separately in the blocking bugs.