Fix semantics of uploading HTML sources to 3D textures.

Fix semantics of uploading HTML sources to 3D textures.

The earlier code misinterpreted the spec as using the UNPACK_IMAGE_HEIGHT
pixel storage parameter to slice the image's sub-rectangle into multiple
layers of a 3D texture.

The new semantics, which Firefox implements, walk the image sub-rectangle
"depth" times through the source image, striding by UNPACK_IMAGE_HEIGHT
rows each time -- this parameter defaulting to the height of the 3D
texture.

Tested with all conformance2/textures/ tests in
https://github.com/KhronosGroup/WebGL/pull/2158 .

(Removes WebGL conformance roll that was included on master branch)

BUG=639145
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2511153002
Cr-Commit-Position: refs/heads/master@{#433079}
(cherry picked from commit d481a01bc050798a91512bdad6a70fccf0cb27a3)

Committed: https://chromium.googlesource.com/chromium/src/+/3fa4ac854ab92ab1f7904d1ea08d4abfaf1abca8

[Ken Russell (switch to Gerrit), 2016-11-23 01:23:44]

Description was changed from

==========
Fix semantics of uploading HTML sources to 3D textures.

The earlier code misinterpreted the spec as using the UNPACK_IMAGE_HEIGHT
pixel storage parameter to slice the image's sub-rectangle into multiple
layers of a 3D texture.

The new semantics, which Firefox implements, walk the image sub-rectangle
"depth" times through the source image, striding by UNPACK_IMAGE_HEIGHT
rows each time -- this parameter defaulting to the height of the 3D
texture.

Tested with all conformance2/textures/ tests in
https://github.com/KhronosGroup/WebGL/pull/2158 .

(Removes WebGL conformance roll that was included on master branch)

BUG=639145
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2511153002
Cr-Commit-Position: refs/heads/master@{#433079}
(cherry picked from commit d481a01bc050798a91512bdad6a70fccf0cb27a3)
==========

to

==========
Fix semantics of uploading HTML sources to 3D textures.

The earlier code misinterpreted the spec as using the UNPACK_IMAGE_HEIGHT
pixel storage parameter to slice the image's sub-rectangle into multiple
layers of a 3D texture.

The new semantics, which Firefox implements, walk the image sub-rectangle
"depth" times through the source image, striding by UNPACK_IMAGE_HEIGHT
rows each time -- this parameter defaulting to the height of the 3D
texture.

Tested with all conformance2/textures/ tests in
https://github.com/KhronosGroup/WebGL/pull/2158 .

(Removes WebGL conformance roll that was included on master branch)

BUG=639145
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2511153002
Cr-Commit-Position: refs/heads/master@{#433079}
(cherry picked from commit d481a01bc050798a91512bdad6a70fccf0cb27a3)

Committed:
https://chromium.googlesource.com/chromium/src/+/3fa4ac854ab92ab1f7904d1ea08d...
==========

[Ken Russell (switch to Gerrit), 2016-11-23 01:23:46]

Committed patchset #1 (id:1) manually as
3fa4ac854ab92ab1f7904d1ea08d4abfaf1abca8.