View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0031597 | Open CASCADE | OCCT:Visualization | public | 2020-06-03 20:48 | 2021-09-22 17:29 |
| Reporter | kgv | Assigned To | bugmaster | ||
| Priority | normal | Severity | feature | ||
| Status | closed | Resolution | fixed | ||
| Target Version | 7.6.0 | Fixed in Version | 7.6.0 | ||
| Summary | 0031597: Visualization, TKOpenGl - allow disabling Alpha component writes within OpenGl_Context::ColorMask() | ||||
| Description | Current 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 | ||||
| Tags | No tags attached. | ||||
| Test case number | Not required | ||||
| related to | 0031581 | new | Open CASCADE | Visualization, Graphic3d - add dedicated structure defining rasterization Pipeline parameters | |
| related to | 0031964 | new | Community | Visualization, TKOpenGl - add option to disable background color filling for external render buffer | |
| parent of | 0032113 | closed | bugmaster | Open CASCADE | Visualization, TKOpenGl - broken PBR diffuse map within OpenGl_Caps::buffersOpaqueAlpha() on OpenGL ES 2.0 |
| parent of | 0032301 | closed | bugmaster | Open CASCADE | Visualization, TKOpenGl - depth peeling is broken with OpenGl_Caps::buffersOpaqueAlpha option |
| related to | 0031988 | closed | bugmaster | Community | Visualization - use Quantity_ColorRGBA as background rather than Quantity_Color to support alpha channel |
| related to | 0032077 | assigned | nds | Open CASCADE | Visualization - setting custom default frame buffer object for OpenGl context |
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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. |
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bug31597_transp.png (3,808 bytes) |
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bug31597_opaque.png (4,335 bytes) |
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bug31597_textransp.png (2,226 bytes) |
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bug31597_texopaque.png (1,901 bytes) |
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Branch CR31597 has been updated forcibly by kgv. SHA-1: 901610f1eb3885572c9ccef8e7cc3e9879614fc6 |
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Patch is ready for review - OCCT branch: CR31597. http://jenkins-test-12.nnov.opencascade.com:8080/view/CR31597-master-KGV/ |
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The patch was reviewed without remarks |
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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 |
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Branch CR31597 has been deleted by inv. SHA-1: 901610f1eb3885572c9ccef8e7cc3e9879614fc6 |
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Funny that Linux developers have decided to implement EGL_EXT_present_opaque extension for similar issue, as Wayland treats alpha channel in window backbuffer for blending. https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_present_opaque.txt |
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occt: master 31174e1a 2020-12-12 09:24:50 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. |
Affected Issues 0031597 |
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| 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 | ||
| 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 | |
| 2020-12-12 12:05 | kgv | Steps to Reproduce Updated | |
| 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 |
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Note Added: 0097565 | |
| 2020-12-14 11:05 |
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Assigned To | osa => bugmaster |
| 2020-12-14 11:05 |
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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 |
| 2021-02-02 16:59 | kgv | Relationship added | related to 0032077 |
| 2021-02-02 23:03 | kgv | Relationship added | parent of 0032113 |
| 2021-04-15 16:40 | kgv | Relationship added | parent of 0032301 |
| 2021-09-22 17:28 | kgv | Note Added: 0104291 | |
| 2021-09-22 17:29 | kgv | Note Edited: 0104291 |
