OpenGL3.0.. I mean 2.2

_the_phantom_ · 2008-09-20T22:49:05

Well, someone has linked to the following on OpenGL.org; http://opengl.org/registry/doc/glspec30.20080811.pdf And, well, thanks but no thanks. All those glorious changes? Gone. The rewritten API? Gone. What we are left with is OpenGL2.2. To quote Eddy Luten from the Opengl.org forum; Quote: For those who don't feel like digging through the spec, OpenGL 3.0 Equals: API support for the new texture lookup, texture format, and integer and unsigned integer capabilities of the OpenGL Shading Language 1.30 specification (GL EXT gpu shader4). Conditional rendering (GL NV conditional render). Fine control over mapping buffer subranges into client space and flushing modified data. Floating-point color and depth internal formats for textures and renderbuffers (GL ARB color buffer float, GL NV depth buffer float, 455 N.2. DEPRECATION MODEL 456 GL ARB texture float, GL EXT packed float, and GL EXT texture shared exponent). Framebuffer objects (GL EXT framebuffer object). Half-float (16-bit) vertex array and pixel data formats (GL NV half float and GL ARB half float pixel). Multisample stretch blit functionality (GL EXT framebuffer multisample and GL EXT framebuffer blit). Non-normalized integer color internal formats for textures and renderbuffers (GL EXT texture integer). One- and two-dimensional layered texture targets (GL EXT texture array). Packed depth/stencil internal formats for combined depth+stencil textures and renderbuffers (GL EXT packed depth stencil). Per-color-attachment blend enables and color writemasks (GL EXT draw buffers2). RGTC specific internal compressed formats (GL EXT texture compression rgtc). Single- and double-channel (R and RG) internal formats for textures and renderbuffers. Transform feedback (GL EXT transform feedback). Vertex array objects (GL APPLE vertex array object). sRGB framebuffer mode (GL EXT framebuffer sRGB) Plus deprecation of older features. As he said, where the hell are the objects? Frankly, this is crap. I said it was a sink or swim moment for the ARB and it's just sunk without a trace. It appears the reason is they don't want to break the API because of all the CAD apps out there (J. Carmack, QuakeCon2008), and in doing so have finally put the nail into the coffin games wise. I'd like to congratulate MS for winning the 3D API 'war' on Windows, turns out they didn't need to sink the goodship OpenGL, the captains ran it into an iceberg for them.

Graphics and GPU Programming Programming OpenGL

Started by _the_phantom_ August 11, 2008 08:56 AM

336 comments, last by JMNightmare 15 years, 7 months ago

DOS4dinner

122

August 19, 2008 09:16 PM

Quote:Original post by V-man
Quote:Original post by DOS4dinner
Well, at least the current OpenGL book I got a year ago should still be usable. Not that I plan on using it (SDL FTW)

I feel bad for Linux. I use Linux, and now for all general purposes we don't have a decent API. I think we are better off hoping WINE can rewrite the DirectX API than trusting OpenGL.

So...who wants to form UbuntuGL?

Here is what the OpenGL site should really be.

You do understand that WINE's DX library uses GL? WINE doesn't have drivers. WINE is basically an application that opens your Windows EXE as if it was a plain file.

Quote:So...who wants to form UbuntuGL?

How about improving OpenGL?

Yes, I knew WINE uses OpenGL. Wait...Doesn't that mean that if a Windows program uses certain DX9/10 functions that WINE cannot ever hope to emulate them, as OpenGL itself cannot do it?

Hodgman

52,717

August 19, 2008 09:29 PM

Quote:Original post by DOS4dinner
Yes, I knew WINE uses OpenGL. Wait...Doesn't that mean that if a Windows program uses certain DX9/10 functions that WINE cannot ever hope to emulate them, as OpenGL itself cannot do it?

What can you do in DX9/10 that you can't do in GL?

. 22 Racing Series .

V-man

813

August 19, 2008 11:24 PM

Quote:Original post by DOS4dinner
Yes, I knew WINE uses OpenGL. Wait...Doesn't that mean that if a Windows program uses certain DX9/10 functions that WINE cannot ever hope to emulate them, as OpenGL itself cannot do it?

I think the answer is obvious.
The bigger problem is translating shaders to GLSL. I assume there are a lot of problems in that department. I admit, I'm not a avid WINE user. I mostly run Windows.

Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);

V-man

813

August 19, 2008 11:47 PM

Quote:Original post by Spoonbender
If anything, OpenGL is abusing its monopoly on non-Windows platforms, to sit on their asses and do nothing for the better part of a decade. They can only do that because no alternative exists.

OpenGL is just an API, a technology, a spec. A company can be a monopoly but not a spec.

On the Windows platform, OpenGL doesn't really exist. If you install Windows (2000, XP, Vista), it does properly detect your video card but it won't install the opengl driver. Hmm... why is that?
Stranger still, it does install DirectX and the DirectX diagnostics utility. You get full hw acceleration.

You are so blindled by your hate that Long Peaks hasn't released, that you are resorting to word twisting and ignoring all the crap tactics of Microsoft.

MARS_999

1,627

August 20, 2008 12:50 AM

Quote:Original post by Spoonbender
If anything, OpenGL is abusing its monopoly on non-Windows platforms, to sit on their asses and do nothing for the better part of a decade. They can only do that because no alternative exists.

That is so funny. Reason GL is the only choice is, MS has decided NOT to put DX on those platforms. If DX was on those platform it probably would be used more than GL, sad to say.

_the_phantom_

11,263

Author

August 20, 2008 04:49 AM

Quote:Original post by V-man
On the Windows platform, OpenGL doesn't really exist. If you install Windows (2000, XP, Vista), it does properly detect your video card but it won't install the opengl driver. Hmm... why is that?

Well, it does provide an OpenGL1.1 implimentation on XP and a hardware accelerated via D3D 1.4 version on Vista, which is more than MS have to do as they don't have anything todo with OpenGL.

It's like complaining that MS don't ship Firefox and Opera on their Windows install DVDs.

Quote:
Stranger still, it does install DirectX and the DirectX diagnostics utility. You get full hw acceleration.

OMG! MS in doing what is best for their platform shock!
(you also get full HW acceleration on Vista for OpenGL1.4, again more than they have to do as they have nothing todo with OpenGL).

Neutrinohunter

158

August 20, 2008 07:17 AM

I have to say the news has annoyed me somewhat and is probably going to make me move towards DX10 when I get my new workstations.

Its a shame they've done this as by the time they actually get their arses in gear, DX will be far in the distance. DX has come along way since the 90's and its sad to say OpenGL really hasn't.

I think a good old DX10 wrapper for OpenGL could be in the offing.

mrbastard

1,577

August 20, 2008 07:55 AM

Quote:Original post by rbarris
The wording on the Blizzard slides was intentionally terse (I never like presentations where the presenter is just reading the words on the slides); if you have any questions about the content in that segment I would be happy to try and respond to them.

There are a couple of new features that I'd like to know a bit more about from a game developer's perspective:

Transform Feedback
-I've read the GPU Gems chapter on using transform feedback in D3D10 for increasing the number of morph targets you can blend between for facial animation. Any more ideas on areas where Transform Feedback will be useful?
-Does using Transform Feedback make it harder/easier to balance feeding the pipeline? Is it just a case of "well, I'm fill bound so I can afford a few extra feedback loops at the vertex stage"?

Conditional Rendering
-I'm pretty sure I understand what this does, and how it improves use of occlusion queries by removing the need for the app code to handle the result. It sounds like it'll make using occlusion queries successfully even harder to understand, but the implementation much easier once you understand how to do it. Any tips? Is there any maximum number (or suggested 'best' number) of draw calls that can be queued up as part of a conditional render?

Deprecation Model:
-any tips on handling rollout of apps using different profiles? I've read a bit on this on the opengl.org forums, but I'd be interested in a game developer's perspective.

Edit: almost forgot GLSL [smile]

Removal of Built-In uniforms
-as GLSL has nothing like HLSL/FX's 'semantics' the built-in uniforms were handy for exchanging shaders between apps. Does the ARB have a better solution, GLFX maybe? (sorry, I've been unable to find anything on the recent GLFX update)

Centroid qualifier
-is this for point-sampling?

thanks

[size="1"]

SergioJdelos

468

August 20, 2008 09:21 AM

Quote:Original post by mrbastard
Removal of Built-In uniforms
-as GLSL has nothing like HLSL/FX's 'semantics' the built-in uniforms were handy for exchanging shaders between apps. Does the ARB have a better solution, GLFX maybe? (sorry, I've been unable to find anything on the recent GLFX update)

I think that ColladaFX is the official solution.

MARS_999

1,627

August 20, 2008 11:34 AM

GLFX is what they are working on, they have been quiet about it lately.

OpenGL3.0.. I mean 2.2

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OpenGL3.0.. I mean 2.2

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