[Public WebGL] MIP rendering in WebGL (integration of EXT_blend_minmax)
Wed Dec 12 10:22:43 PST 2012
- OpenGL Extension EXT_blend_minmax. Initially introduced 1995 by SGI,
modified 2009 for ES.
- OpenGL ES EXT_blend_minmax. Introduced 2009:
- Direct3D: D3DBLENDOP_MIN/MAX, Released with Direct3D 9.0 in 2002
- Desktop D3D: 99.45% (Not being DX8 GPUs or below) source:
- Desktop OpenGL: 98%, source:
- Mobiles: As of November 2012, 228 devices out of 783, source:
Proposal Extension: https://github.com/KhronosGroup/WebGL/pull/109
On Wed, Dec 12, 2012 at 5:58 PM, Sébastien Jodogne <[email protected]>wrote:
> Dear all,
> I am the main developer of the Orthanc open-source software, that is an
> open-source server for storing medical images . We currently plan to
> extend Orthanc so as to propose a Web-based interface for displaying 2D/3D
> images according to medical standards. Obviously, this would be a huge step
> toward the adoption of WebGL in scientific applications.
> Unfortunately, medical/scientific visualization requires native support
> for MIP rendering (Maximum Intensity Projection) in WebGL . Currently,
> it seems that only the FUNC_ADD, FUND_SUBTRACT and FUNC_REVERSE_SUBTRACT
> blending equations are supported in OpenGL ES . However, the extension
> "EXT_blend_minmax" currently brings MIP rendering to OpenGL ES , but not
> (yet) to WebGL.
> I am therefore convinced that porting the "EXT_blend_minmax" inside WebGL
> would be of major interest for the adoption of WebGL, both in medical and
> scientific applications.
> How is it possible to suggest to the Khronos group to integrate this
> extension inside WebGL? Should we contact Firefox developers?
> Thanks in advance for your help,
> S. Jodogne-
>  https://code.google.com/p/orthanc/
>  http://en.wikipedia.org/wiki/Maximum_intensity_projection
>  http://www.khronos.org/opengles/sdk/docs/man/xhtml/glBlendEquation.xml
>  http://www.opengl.org/registry/specs/EXT/blend_minmax.txt
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