Merge 117918 - Must set/reset pixel unpack alignment to 1 during texSubImage2D

Merge 117918 - Must set/reset pixel unpack alignment to 1 during texSubImage2D
https://bugs.webkit.org/show_bug.cgi?id=86877

Reviewed by James Robinson.

Source/WebCore:

Set pixel unpack alignment to 1 during upload, resetting afterward.

Tests: fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgb565.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgba4444.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgba5551.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgb565.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgba4444.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgba5551.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgb565.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgba4444.html
       fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgba5551.html

* html/canvas/WebGLRenderingContext.cpp:
(WebCore::WebGLRenderingContext::texSubImage2DImpl):
(WebCore::WebGLRenderingContext::texSubImage2D):
    Set pixel unpack alignment to 1 during upload; reset afterward.

LayoutTests:

Incorporated several tests from WebGL conformance suite at Khronos
as layout tests, verifying upload to all packed pixel formats.

There were difficulties incorporating the video-related variants
of these tests; Bug 87042 has been filed to track their addition.

* fast/canvas/webgl/resources/tex-image-and-sub-image-2d-with-canvas.js: Added.
(generateTest.init):
(generateTest.runOneIteration):
(generateTest.runTest):
(generateTest):
* fast/canvas/webgl/resources/tex-image-and-sub-image-2d-with-image-data.js: Added.
(generateTest.init):
(generateTest.runOneIteration):
(generateTest.runTest):
(generateTest):
* fast/canvas/webgl/resources/tex-image-and-sub-image-2d-with-image.js: Added.
(generateTest.init):
(generateTest.runOneIteration):
(generateTest.runTestOnImage):
(generateTest.runTest.newImage.onload):
(generateTest.runTest):
(generateTest.runTest2.newImage.onload):
(generateTest.runTest2):
(generateTest.runTest3):
(generateTest):
* fast/canvas/webgl/resources/webgl-test-utils.js:
(WebGLTestUtils):
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgb565-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgb565.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgba4444-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgba4444.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgba5551-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas-rgba5551.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-canvas.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-expected.txt:
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgb565-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgb565.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgba4444-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgba4444.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgba5551-expected.txt: Copied from LayoutTests/fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-expected.txt.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data-rgba5551.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-data.html:
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-expected.txt:
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgb565-expected.txt: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgb565.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgba4444-expected.txt: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgba4444.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgba5551-expected.txt: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image-rgba5551.html: Added.
* fast/canvas/webgl/tex-image-and-sub-image-2d-with-image.html:


TBR=kbr@google.com
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=118259