gfx: introduce GpuMemoryBufferAttrib to communicate format modifiers

format modifiers, together with formats, convey the information required
to interpret the contents of a buffer. pack these together as
gfx::GpuMemoryBufferAttrib to make communicating the platform supported
GpuMemoryBuffer formats/modifiers easier.

BUG=708947

[varad, 2017-04-06 08:45:26]

Patchset #2 (id:20001) has been deleted

[varad, 2017-04-06 09:05:07]

Description was changed from

==========
gfx: introduce generic format modifier tokens

format modifiers provide extra information to specify how the contents
of a buffer are laid out. we intend to be platform-agnostic with this
information when the buffers are imported/exported across components,
but the tokens loosely map to those in drm_fourcc.h.

this also adds a container to pack gfx::BufferFormat and the newly added
gfx::BufferFormatModifier token as a gfx::GpuMemoryBufferAttrib, which
will be passed around when a client queries for the platform supported
format-modifier pairs.

BUG=

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

to

==========
gfx: introduce generic format modifier tokens

format modifiers provide extra information to specify how the contents
of a buffer are laid out. we intend to be platform-agnostic with this
information when the buffers are imported/exported across components,
but the tokens loosely map to those in drm_fourcc.h.

this also adds a container to pack gfx::BufferFormat and the newly added
gfx::BufferFormatModifier token as a gfx::GpuMemoryBufferAttrib, which
will be passed around when a client queries for the platform supported
format-modifier pairs.

BUG=crbug.com/708947

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

[varad, 2017-04-06 09:05:42]

Description was changed from

==========
gfx: introduce generic format modifier tokens

format modifiers provide extra information to specify how the contents
of a buffer are laid out. we intend to be platform-agnostic with this
information when the buffers are imported/exported across components,
but the tokens loosely map to those in drm_fourcc.h.

this also adds a container to pack gfx::BufferFormat and the newly added
gfx::BufferFormatModifier token as a gfx::GpuMemoryBufferAttrib, which
will be passed around when a client queries for the platform supported
format-modifier pairs.

BUG=crbug.com/708947

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

to

==========
gfx: introduce generic format modifier tokens

format modifiers provide extra information to specify how the contents
of a buffer are laid out. we intend to be platform-agnostic with this
information when the buffers are imported/exported across components,
but the tokens loosely map to those in drm_fourcc.h.

this also adds a container to pack gfx::BufferFormat and the newly added
gfx::BufferFormatModifier token as a gfx::GpuMemoryBufferAttrib, which
will be passed around when a client queries for the platform supported
format-modifier pairs.

BUG=708947

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

[varad, 2017-04-06 09:23:21]

varadgautam@gmail.com changed reviewers:
+ reveman@chromium.org

[varad, 2017-04-06 09:26:23]

varadgautam@gmail.com changed reviewers:
+ dcastagna@chromium.org

[varad, 2017-04-06 14:15:33]

[WIP 1/8] for GMB format/modifier communication, please take a look. could I get
please get access to a trybot to test the builds on for this series?

[Daniele Castagna, 2017-04-06 18:11:08]

ccing Kristian.

[hoegsberg1, 2017-04-13 17:29:41]

On 2017/04/06 18:11:08, Daniele Castagna wrote:
> ccing Kristian.

I'm missing most of the context here or maybe just the rest of the series, but
I'm pretty sure we don't want to talke about X tiling etc at this level or
anywhere outside minigbm. From Chrome and ozone's point of view, modifiers are
just 64 bit tokens that describe some kind of hw-dependent buffer layout.

[varad, 2017-04-19 15:54:17]

Description was changed from

==========
gfx: introduce generic format modifier tokens

format modifiers provide extra information to specify how the contents
of a buffer are laid out. we intend to be platform-agnostic with this
information when the buffers are imported/exported across components,
but the tokens loosely map to those in drm_fourcc.h.

this also adds a container to pack gfx::BufferFormat and the newly added
gfx::BufferFormatModifier token as a gfx::GpuMemoryBufferAttrib, which
will be passed around when a client queries for the platform supported
format-modifier pairs.

BUG=708947

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

to

==========
gfx: introduce GpuMemoryBufferAttrib to communicate format modifiers

format modifiers, together with formats, convey the information required
to interpret the contents of a buffer. pack these together as
gfx::GpuMemoryBufferAttrib to make communicating the platform supported
GpuMemoryBuffer formats/modifiers easier.

BUG=708947

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

[varad, 2017-04-19 15:54:43]

Description was changed from

==========
gfx: introduce GpuMemoryBufferAttrib to communicate format modifiers

format modifiers, together with formats, convey the information required
to interpret the contents of a buffer. pack these together as
gfx::GpuMemoryBufferAttrib to make communicating the platform supported
GpuMemoryBuffer formats/modifiers easier.

BUG=708947

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
==========

to

==========
gfx: introduce GpuMemoryBufferAttrib to communicate format modifiers

format modifiers, together with formats, convey the information required
to interpret the contents of a buffer. pack these together as
gfx::GpuMemoryBufferAttrib to make communicating the platform supported
GpuMemoryBuffer formats/modifiers easier.

BUG=708947
==========

[varad, 2017-04-19 15:55:43]

Description was changed from

==========
gfx: introduce GpuMemoryBufferAttrib to communicate format modifiers

format modifiers, together with formats, convey the information required
to interpret the contents of a buffer. pack these together as
gfx::GpuMemoryBufferAttrib to make communicating the platform supported
GpuMemoryBuffer formats/modifiers easier.

BUG=708947
==========

to

==========
format modifiers, together with formats, convey the information required
to interpret the contents of a buffer. pack these together as
gfx::GpuMemoryBufferAttrib to make communicating the platform supported
GpuMemoryBuffer formats/modifiers easier.

BUG=708947
==========

[varad, 2017-04-25 06:11:13]

v2: use uint64_t modifiers instead of specific BufferFormatModifier tokens.