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IDProjectCategoryView StatusDate SubmittedLast Update
0031597Open CASCADE[OCCT] OCCT:Visualizationpublic2020-06-03 20:482020-12-21 15:18
Reporterkgv 
Assigned Tobugmaster 
PrioritynormalSeverityfeature 
StatusverifiedResolutionfixed 
PlatformOSOS Version
Product Version 
Target Version[OCCT] 7.6.0*Fixed in Version 
Summary0031597: Visualization, TKOpenGl - allow disabling Alpha component writes within OpenGl_Context::ColorMask()
DescriptionCurrent implementation of OpenGl_Context::ColorMask() property allows enabling/disabling writes into all color components at once.

This is enough for most scenarios, however in some cases it is desired disabling writes into Alpha color component individually - to prevent unexpected blending of render target flushed by external compositor. This happens, for example, in case of WebGL canvas, and cannot be trivially disabled by canvas flags.
Steps To Reproduce
set aTexImg "t.png"
pload MODELING VISUALIZATION
box b 1 2 3
vclear
vinit View1
vdisplay -dispMode 1 b
vaspects b -shadingModel UNLIT -setColor GREEN -transparency 0.5
vtop
vfit
vdump $aTexImg -width 512 -height 512 -buffer rgba
vclear
vdisplay -dispMode 1 b
vaxo
vfit
vtexture b $aTexImg
vaspects b -alphaMode blend

TagsNo tags attached.
Test case numberNot required
Attached Filespng file icon bug31597_transp.png (3,808 bytes) 2020-12-12 13:09
png file icon bug31597_opaque.png (4,335 bytes) 2020-12-12 13:09
png file icon bug31597_textransp.png (2,226 bytes) 2020-12-12 13:09
png file icon bug31597_texopaque.png (1,901 bytes) 2020-12-12 13:10

- Relationships
related to 0031581newkgv Open CASCADE Visualization, Graphic3d - add dedicated structure defining rasterization Pipeline parameters 
related to 0031964newkgv Community Visualization, TKOpenGl - add option to disable background color filling for external render buffer 
related to 0031988feedbackkgv Community Visualization - use Quantity_ColorRGBA as background rather than Quantity_Color to support alpha channel 

-  Notes
(0097528)
git (administrator)
2020-12-12 13:08

 Branch CR31597 has been created by kgv.

SHA-1: d2b8ae445d028f713eb89d6539b93e428eff5c1f


Detailed log of new commits:

Author: kgv
Date: Sat Dec 12 12:24:50 2020 +0300

    0031597: Visualization, TKOpenGl - allow disabling Alpha component writes within OpenGl_Context::ColorMask()
    
    Added OpenGl_Caps::buffersOpaqueAlpha option allowing to disable writes
    into alpha component of color buffer and keep it opaque.
    Added OpenGl_Context::SetColorMaskRGBA() method overriding each color component deliberately.
(0097551)
git (administrator)
2020-12-12 14:00

 Branch CR31597 has been updated forcibly by kgv.

SHA-1: 901610f1eb3885572c9ccef8e7cc3e9879614fc6
(0097556)
kgv (developer)
2020-12-12 22:12

 Patch is ready for review
- OCCT branch: CR31597.

http://jenkins-test-12.nnov.opencascade.com:8080/view/CR31597-master-KGV/ [^]
(0097565)
osa (developer)
2020-12-14 11:05

 The patch was reviewed without remarks
(0097737)
bugmaster (administrator)
2020-12-19 14:48

 Combination -
OCCT branch : IR-2020-12-18
master SHA - 04114fd201c20efe9fbe85f00bec9a99ae3747ad
a206de37fbfa0bf71bd534ae47192bbec23b8522
Products branch : IR-2020-12-18 SHA - 290e5c74e8fef71947cadf90acb8e43c81ed10a1
was compiled on Linux, MacOS and Windows platforms and tested in optimize mode.

Number of compiler warnings:
No new/fixed warnings

Regressions/Differences/Improvements:
No regressions/differences

CPU differences:
Debian80-64:
OCCT
Total CPU difference: 17709.570000000054 / 17744.450000000124 [-0.20%]
Products
Total CPU difference: 12258.480000000121 / 12330.210000000125 [-0.58%]
Windows-64-VC14:
OCCT
Total CPU difference: 19272.796875 / 19429.1875 [-0.80%]
Products
Total CPU difference: 13712.859375 / 13755.5 [-0.31%]


Image differences :
No differences that require special attention

Memory differences :
No differences that require special attention
(0097785)
git (administrator)
2020-12-19 15:23

 Branch CR31597 has been deleted by inv.

SHA-1: 901610f1eb3885572c9ccef8e7cc3e9879614fc6

- Related Changesets
occt: master 31174e1a
Timestamp: 2020-12-12 09:24:50
Author: kgv
Committer: bugmaster
[ Details ] [ Diff ] 		0031597: Visualization, TKOpenGl - allow disabling Alpha component writes within OpenGl_Context::ColorMask()

Added OpenGl_Caps::buffersOpaqueAlpha option allowing to disable writes
into alpha component of color buffer and keep it opaque.
Added OpenGl_Context::SetColorMaskRGBA() method overriding each color component deliberately.

New option is set within WebGL sample.
mod - samples/webgl/WasmOcctView.cpp [ Diff ] [ File ]
mod - src/OpenGl/OpenGl_Caps.cxx [ Diff ] [ File ]
mod - src/OpenGl/OpenGl_Caps.hxx [ Diff ] [ File ]
mod - src/OpenGl/OpenGl_Context.cxx [ Diff ] [ File ]
mod - src/OpenGl/OpenGl_Context.hxx [ Diff ] [ File ]
mod - src/OpenGl/OpenGl_LayerList.cxx [ Diff ] [ File ]
mod - src/OpenGl/OpenGl_View_Redraw.cxx [ Diff ] [ File ]
mod - src/ViewerTest/ViewerTest_ViewerCommands.cxx [ Diff ] [ File ]

- Issue History
Date Modified Username Field Change
2020-06-03 20:48 kgv New Issue
2020-06-03 20:48 kgv Assigned To => kgv
2020-06-03 20:48 kgv Relationship added related to 0031581
2020-09-21 17:42 kgv Target Version 7.5.0 => 7.6.0*
2020-12-09 11:11 kgv Relationship added related to 0031988
2020-12-12 11:58 kgv Steps to Reproduce Updated View Revisions
2020-12-12 12:05 kgv Steps to Reproduce Updated View Revisions
2020-12-12 13:08 git Note Added: 0097528
2020-12-12 13:09 kgv File Added: bug31597_transp.png
2020-12-12 13:09 kgv File Added: bug31597_opaque.png
2020-12-12 13:09 kgv File Added: bug31597_textransp.png
2020-12-12 13:10 kgv File Added: bug31597_texopaque.png
2020-12-12 14:00 git Note Added: 0097551
2020-12-12 22:12 kgv Note Added: 0097556
2020-12-12 22:12 kgv Assigned To kgv => osa
2020-12-12 22:12 kgv Status new => resolved
2020-12-14 11:05 osa Note Added: 0097565
2020-12-14 11:05 osa Assigned To osa => bugmaster
2020-12-14 11:05 osa Status resolved => reviewed
2020-12-19 14:48 bugmaster Note Added: 0097737
2020-12-19 14:48 bugmaster Status reviewed => tested
2020-12-19 14:52 bugmaster Test case number => Not required
2020-12-19 15:06 bugmaster Changeset attached => occt master 31174e1a
2020-12-19 15:06 bugmaster Status tested => verified
2020-12-19 15:06 bugmaster Resolution open => fixed
2020-12-19 15:23 git Note Added: 0097785
2020-12-21 15:18 kgv Relationship added related to 0031964

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