Re: [clutter] Considering Clutter for Toonloop
Hello Emmanuele and everyone, 2010/7/28 Emmanuele Bassi eba...@linux.intel.com: I'm currently out of office to a conference, so I'm going to answer very quickly... Thanks for replying so quickly! You are much dedicated, as we can see on the IRC and the mailing list. :) On Tue, 2010-07-27 at 10:21 -0400, Alexandre Quessy wrote: 2) My second requirement, is that we can set the actor (the plane on which we draw the texture) can be automatically resized when the window is resized. (the units are in pixels in Clutter, which is not what I am used with) I know this is possible in Clutter. it's possible. you can set the stage to be resizable and then use notification on allocation changes. in Clutter 1.4 there will be a ClutterBindConstraint and a ClutterAlignConstraint which allows to match position/size and align actors depending on normalized (0.0 → 1.0) values. These will only be in version 1.4: I see. I'll find a way, meanwhile, peeking in the code of those new tools. 4) Fourth requirement: be able to use shaders with two textures fed to it. The idea is to blend two images together using the overlay mode. (the live input + the animation playback) That's what I am not sure at all about. ClutterShader allows that - just create a ClutterTexture, get the CoglMaterial out of it and set two CoglTextures as two separate material layers. the layer number is also the texture sampler id. It's nice that the library provides tools to do that. There are many project which need that. the interactive test suite has a lot of code that deals with the API; some high level GL concepts are mapped in an object oriented way, but they are relatively the same. Yes, there will be plenty of stuff to dig into. Of course, it's always possible to dig and play in the guts of low-level OpenGL stuff. Thanks again! -- Alexandre Quessy http://alexandre.quessy.net/ -- To unsubscribe send a mail to clutter+unsubscr...@o-hand.com
Re: [clutter] Considering Clutter for Toonloop
hi; I'm currently out of office to a conference, so I'm going to answer very quickly... On Tue, 2010-07-27 at 10:21 -0400, Alexandre Quessy wrote: 1) My first requirement is that we can set the texture data using a pointer to char*, like in http://github.com/aalex/proto-toonloop/blob/proto-gtkglext/src/gui.cpp on line 368. (that's where the interesting Toonloop development is hidden these days!) ClutterTexture has the API to do exactly that: • clutter_texture_set_from_rgb_data() http://docs.clutter-project.org/docs/clutter/stable/ClutterTexture.html#clutter-texture-set-from-rgb-data • clutter_texture_set_area_from_rgb_data() http://docs.clutter-project.org/docs/clutter/stable/ClutterTexture.html#clutter-texture-set-area-from-rgb-data 2) My second requirement, is that we can set the actor (the plane on which we draw the texture) can be automatically resized when the window is resized. (the units are in pixels in Clutter, which is not what I am used with) I know this is possible in Clutter. it's possible. you can set the stage to be resizable and then use notification on allocation changes. in Clutter 1.4 there will be a ClutterBindConstraint and a ClutterAlignConstraint which allows to match position/size and align actors depending on normalized (0.0 → 1.0) values. 3) Third requirement: be able to resize the window, make it fullscreen, embed it in GTK+. Should be OK too in Clutter. true. clutter-gtk is the library that allows that. 4) Fourth requirement: be able to use shaders with two textures fed to it. The idea is to blend two images together using the overlay mode. (the live input + the animation playback) That's what I am not sure at all about. ClutterShader allows that - just create a ClutterTexture, get the CoglMaterial out of it and set two CoglTextures as two separate material layers. the layer number is also the texture sampler id. So far, GtkGlExt meets them all. For Clutter, they are probably all possible too, but it's not so obvious. The good point for Clutter, is that using GLSL shaders is quite easy with it. It wraps the low-level OpenGL calls in an elegant manner. the interactive test suite has a lot of code that deals with the API; some high level GL concepts are mapped in an object oriented way, but they are relatively the same. ciao, Emmanuele. -- Emmanuele Bassi, Open Source Software Engineer Intel Open Source Technology Center -- To unsubscribe send a mail to clutter+unsubscr...@o-hand.com
[clutter] Considering Clutter for Toonloop
Hello! I am considering Clutter (v/s GtkGlExt) for the OpenGL scene in the next version of Toonloop. (1.9) Toonloop is a live animation software that is free, and a lot of fun to play with. Below are my four requirement for an OpenGL engine. I am trying to improve my Clutter prototype, but I find the documentation rather scarce. Before I choose to simply use GtkGlExt (and maybe regret it later when I need higher-level functionnality), I tought I would ask here if anyone has some examples/prototypes for one of the requirements that are listed above. 1) My first requirement is that we can set the texture data using a pointer to char*, like in http://github.com/aalex/proto-toonloop/blob/proto-gtkglext/src/gui.cpp on line 368. (that's where the interesting Toonloop development is hidden these days!) 2) My second requirement, is that we can set the actor (the plane on which we draw the texture) can be automatically resized when the window is resized. (the units are in pixels in Clutter, which is not what I am used with) I know this is possible in Clutter. 3) Third requirement: be able to resize the window, make it fullscreen, embed it in GTK+. Should be OK too in Clutter. 4) Fourth requirement: be able to use shaders with two textures fed to it. The idea is to blend two images together using the overlay mode. (the live input + the animation playback) That's what I am not sure at all about. So far, GtkGlExt meets them all. For Clutter, they are probably all possible too, but it's not so obvious. The good point for Clutter, is that using GLSL shaders is quite easy with it. It wraps the low-level OpenGL calls in an elegant manner. Thanks! -- Alexandre Quessy http://alexandre.quessy.net/ -- To unsubscribe send a mail to clutter+unsubscr...@o-hand.com
