In future, WR will consider this when deciding whether an image
should be promoted to be a native compositor surface.
Differential Revision: https://phabricator.services.mozilla.com/D55406
--HG--
extra : moz-landing-system : lando
The gist of the problem I introduced with the framebuffer coordinate system is that we provided the window rect (effectively) twice:
1. when computing the document rectangle (and Y-inverting it)
2. when rendering
If between these points the window got resized (during scene building), we end up with our document aligned to bottom left corner.
The user expects content to still be aligned to the top left, so that's what is visible as a bug.
The change here switched scene building to only care about device coordinate space, restraining the framebuffer coordinates to be mostly
an implementation detail of the renderer/device (the way it was originally meant to be, when introduced). This way the current window size
is only considered once during rendering.
Differential Revision: https://phabricator.services.mozilla.com/D28731
--HG--
extra : moz-landing-system : lando
disclaimer: this isn't an *amazing* cleanup, but more of a major step that
unlocks the ability to do more minor cleanups and refinements. There's some
messy things and inconsistencies here and there, but we can hopefully iron
them out over time.
1. The primary change here is to move from
struct { common_fields, enum(specific_fields) }
to
enum (maybe_common_fields, specific_fields)
most notably this drops the common fields from a ton of things
that don't need them PopXXX, SetXXX, ClipChain, etc.
2. Additionally some types have had some redundant states shaved off,
for instance, rect no longer has *both* bounds and a clip_rect, as
the intersection of the two can be used. This was done a bit conservatively
as some adjustments will need to be done to the backend to fully eliminate
some states, and this can be done more incrementally.
2.5. As a minor side-effect of 2, we now early-reject some primitives whose
bounds and clip_rect are disjoint.
3. A HitTest display item has been added, which is just a Rect without
color. In addition to the minor space wins from this, this makes it much
easier to debug display lists
4. Adds a bunch of comments to the display list, making it easier to understand
things.
The end result of all these changes is a significantly smaller and easier to
understand display list. Especially on pages like gmail which have so many
clip chains. However this ultimately just makes text an even greater percentage
of pages (often 70-80%).
Differential Revision: https://phabricator.services.mozilla.com/D27439
--HG--
extra : moz-landing-system : lando
disclaimer: this isn't an *amazing* cleanup, but more of a major step that
unlocks the ability to do more minor cleanups and refinements. There's some
messy things and inconsistencies here and there, but we can hopefully iron
them out over time.
1. The primary change here is to move from
struct { common_fields, enum(specific_fields) }
to
enum (maybe_common_fields, specific_fields)
most notably this drops the common fields from a ton of things
that don't need them PopXXX, SetXXX, ClipChain, etc.
2. Additionally some types have had some redundant states shaved off,
for instance, rect no longer has *both* bounds and a clip_rect, as
the intersection of the two can be used. This was done a bit conservatively
as some adjustments will need to be done to the backend to fully eliminate
some states, and this can be done more incrementally.
2.5. As a minor side-effect of 2, we now early-reject some primitives whose
bounds and clip_rect are disjoint.
3. A HitTest display item has been added, which is just a Rect without
color. In addition to the minor space wins from this, this makes it much
easier to debug display lists
4. Adds a bunch of comments to the display list, making it easier to understand
things.
The end result of all these changes is a significantly smaller and easier to
understand display list. Especially on pages like gmail which have so many
clip chains. However this ultimately just makes text an even greater percentage
of pages (often 70-80%).
Differential Revision: https://phabricator.services.mozilla.com/D27439
--HG--
extra : moz-landing-system : lando
The cleans up our WR use statements further, easying the merge conflicts.
Note: this PR is subject to instant rot, it is preferred to land quickly.
Differential Revision: https://phabricator.services.mozilla.com/D23373
--HG--
extra : moz-landing-system : lando
The cleans up our WR use statements further, easying the merge conflicts.
Note: this PR is subject to instant rot, it is preferred to land quickly.
Differential Revision: https://phabricator.services.mozilla.com/D23373
--HG--
extra : moz-landing-system : lando
The goal of this change was to simplify the semantics of our document placement and split the logical elements inside (display list) from the actual screen rectangle occupied by a document.
To achieve that, we introduce the framebuffer space for things Y-flipped on screen.
We fix the frame outputs, so that they get produced on the first frame without loopback from the frame building to scene building.
Differential Revision: https://phabricator.services.mozilla.com/D21641
--HG--
extra : moz-landing-system : lando
The goal of this change was to simplify the semantics of our document placement and split the logical elements inside (display list) from the actual screen rectangle occupied by a document.
To achieve that, we introduce the framebuffer space for things Y-flipped on screen.
We fix the frame outputs, so that they get produced on the first frame without loopback from the frame building to scene building.
Differential Revision: https://phabricator.services.mozilla.com/D21641
--HG--
extra : moz-landing-system : lando
