Hi Alex, What would be the overhead (or risks) if you'd first do 1.1, and migrate later? Especially when Android devices all support 1.1 still...
-Ton- ------------------------------------------------------------------------ Ton Roosendaal Blender Foundation [email protected] www.blender.org Blender Institute Entrepotdok 57A 1018AD Amsterdam The Netherlands On 4 Jun, 2012, at 5:11, Alexandr Kuznetsov wrote: > I'm working on Android port for GSOC. > > For me, this is critical point of choosing between two OpenGL ES as they > are not compatible. I'm leaning towards ES 2.0 for couple of reasons. Here > the pros and cons of both: > > OpenGL ES 1.1 > Pros: > > 1. 85% compatible with current code > 2. ~2 week of work for BGE > > Cons: > > 1. Only fixed limited pipeline without shaders > 2. Not compatible with ES 2.0 (not easily added) > 3. Next 10% copy and pasting corrections with ugly #ifdef > > > OpenGL ES 2.0 > Pros: > > 1. Shaders > 1. More flexible > 2. Faster > 2. Reuse some existing GLSL > 3. Possible user shader control/extensions > 4. Future of mobile > 5. Future of desktop graphics (GL 3.0+) > 1. Encapsulation of the drawing code > 2. Shader oriented code > 3. Goes nicely with Wilkins's goal > 6. OpenGL ES 1.1 can be added back easily through a "class" > > Cons: > > 1. 75% compatible > 2. ~7 weeks of work (for encapsulation and BGE), (but then it should be > fast as we would have shaders manager and setters nicely abstracted.) > > > > > If we would like eventually switch to OpenGL ES 2.0 for mobile, there is no > better time than now. ES 2.0 implies using only shaders, which is not > compatible with blender current model. I don't want to fix OpenGL ES > without abstraction in order, after a month, to be rewritten by myself and > Jason. With ES 2.0 I will write a matrices and parameters encapsulations to > use shaders. > Want to hear your opinions. > > Thanks, > Alex. > _______________________________________________ > Bf-committers mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-committers _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
