GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

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kas1e

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 5/5 9:25 #841

Home away from home

@Raziel
IMHO every developer who need fresh version can build it (i wrote instructions in gl4es sdk).

But, there lately were some regressions in gl4es cause massive slowdowns on os4, dunno if they were dealt with or not. To be on safe side just use version from my gl4es sdk

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davec555

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 5/6 4:04 #842

Just popping in

@Raziel sent you an email.

Dave

Raziel

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 5/6 8:28 #843

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@davec555

Thank you

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jarokuczi

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 5/12 17:06 #844

Just popping in

Hello, fellow developers as an exercise I'm trying to port quakespasm to amigaos4. I'm kind of new to game development and graphic libraries. So far I managed to boot the game with some visual glitches.

Resized Image

The build crashes a lot and the performance is bad but it starts.

Two problems related to gl4es seem to be causing some of the above.

The first is strange as I can't find any function call with the below values. 0x8036 is defined in gl.h under the name GL_UNSIGNED_INT_10_10_10_2.


LIBGL: Unsupported source data type: 0x8036

LIBGL: swizzle error: (GL_RGBA, 0x8036 -> GL_RGBA, GL_UNSIGNED_BYTE)

LIBGL: Unsupported source data type: 0x8036

LIBGL: swizzle error: (GL_RGBA, 0x8036 -> GL_RGBA, GL_UNSIGNED_BYTE)

LIBGL: Unsupported source data type: 0x8036

LIBGL: swizzle error: (GL_RGBA, 0x8036 -> GL_RGBA, GL_UNSIGNED_BYTE)

It is used as type value for lightmaps if r_lightmapwide is set to 1, which is not the case.


const qboolean wide10bits = r_lightmapwide.value != 0;

    const GLenum type = wide10bits ? GL_UNSIGNED_INT_10_10_10_2 : GL_UNSIGNED_BYTE;

The other problem is about shader compilation (which explains lighting problems):


Warning: GLSL program failed to compile: ERROR: Code generation failed.

Error log:

Boolean uniforms aren't supported yet:

        offset: 0, size: 1, Bool UseAlphaTest

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Is missing one or more source parameters:

                34: OpPhi: Bool: tmp34 << [tmp24, lb5], [tmp33, lb25]

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Boolean uniforms aren't supported yet:

        offset: 1, size: 1, Bool UseOverbright

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Boolean uniforms aren't supported yet:

        offset: 2, size: 1, Bool UseFullbrightTex

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Reading uniforms with an offset that isn't a multiple of 32-bits in size isn't supported:

        offset: 3, size: 16, FloatVector4 color

INTERNAL ERROR: ExtInstruction is missing parameters

INTERNAL ERROR: Store instruction's source parameter is incomplete:

                    OpStore: : tmp99 >> result



Warning: GLSL program failed to compile: ERROR: Code generation failed.

Error log:

Boolean uniforms aren't supported yet:

        offset: 0, size: 1, Bool UseLightmapOnly

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Boolean uniforms aren't supported yet:

        offset: 1, size: 1, Bool UseAlphaTest

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Is missing one or more source parameters:

                41: OpPhi: Bool: tmp41 << [tmp31, lb26], [tmp40, lb32]

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Boolean uniforms aren't supported yet:

        offset: 2, size: 1, Bool UseLightmapWide

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Boolean uniforms aren't supported yet:

        offset: 3, size: 1, Bool UseOverbright

INTERNAL ERROR: OpBranchConditional instruction's source parameters are missing

Boolean uniforms aren't supported yet:

        offset: 4, size: 1, Bool UseFullbrightTex

INTERNAL ERROR: OpBranchConditional instruction's source parameters are mi

Does anyone have similar issues?

Thanks
jarokuczi

Raziel

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 5/12 21:27 #845

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@jarokuczi

regarding boolean uniforms, yeah, they are not supported (still)
did a bug report/feature requests years back, but none came of it

heres what they did to work around it on scummvm
https://github.com/search?q=repo%3Ascu ... lean%20uniforms&type=code

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kas1e

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 5/13 4:05 #846

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@jarokuczi
Can't remember about swizzle errors (i were sure Daniel fix it all before in ogles2, but maybe you need to try to contact with him about), but as Raziel said boolean uniforms is not supported, but as they _very_ easy to be workarounded, Hans (in case of shaders errors it's mostly warp3dnova area) just didn't find motivation to implement them : and implementation of them will take lots of time as he says, and better to just fix shader's code manually (that matter of changing few bits only, as on Raziel's example)

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Raziel

Re: GL4ES: another OpenGL over OpenGLES2 emulation - some tech. info and porting progress

Posted on: 11/3 19:45 #847

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@kas1e

not sure where else to post, but i guess i might have found a bug in gl4es?

please take a look: https://github.com/scummvm/scummvm/pul ... 6#issuecomment-2453049173

thank you

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