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

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IamSONIC

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

Posted on: 2021/4/29 15:19 #761

Just popping in

@kas1e

Ok thank you. I'll file a bug report at GitHub later.

Quote:

As for issues with minigl4gl4es and directly gl4es : minigl4gl4es uses gl4es fully, so no surprise the same bug arise everywhere.

In general yes of course, but MiniGL4GL4ES has been build over 15 months ago and uses a GL4ES version from that time. Recently released GL4ES Library has vastly improved GL compatibility. TriggerRally for example, from zero to (almost) hero

SinanSam460

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

Posted on: 2021/4/30 15:30 #762

Not too shy to talk

@all

I am trying to port f1spirit OpenGLES2 version..

What should I do for following includes ?

#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>

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kas1e

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

Posted on: 2021/4/30 15:39 #763

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@Sinan
If i understand correctly, GLM it just mathematic library for OpenGL, mean you need do nothing with probably ?

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SinanSam460

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

Posted on: 2021/4/30 16:26 #764

Not too shy to talk

@kas1e
My question wasn't clear

It can't find these includes ? It's not a part of MiniGL or OpenGLES2

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IamSONIC

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

Posted on: 2021/4/30 18:35 #765

Just popping in

@SinanSam460

https://github.com/Groovounet/glm/tree/master/glm

Raziel

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

Posted on: 2021/6/16 14:38 #766

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@kas1e

If i install the ogles2 sdk, it will overwrite anything in local/common/include/GL

Is it safe to use your updated GL includes with pure OpenGL too ro were those changed to work with ogles2?

Or in other words, if i install the sdk, can i still mix OpenGL and ogles2 builds, or do i hvae to stick to ogles2?

Thanks

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kas1e

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

Posted on: 2021/6/16 20:51 #767

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@Raziel
For myself i have in SDK this:

GL4ES
GLMGL

When I need one of those, I create in SDK directory "GL", and put ones I need from one of those 2 dirs.

And yeah, you can build or ogles2 build, or minigl build. They different and use different libs, just share "opengl" functions

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Raziel

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

Posted on: 2021/6/16 21:46 #768

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@kas1e

Understood.

Thank a lot

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Raziel

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

Posted on: 2021/6/17 15:50 #769

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@capehill

Ok, i was able to compile a OGLES2 version of ScummVM and now i'm back at the old problem of SDL not opening a window

WARNING: Could not parse GL version 'OpenGL ES 2 3.1 on top of Warp3D Nova 1.85'!
WARNING: SDL Error: Invalid window!

Any help?

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Raziel

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

Posted on: 2021/9/5 8:54 #770

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@all

I forgot how i did it and now i'm getting a lot of these...any hints?


/SDK/local/newlib/lib/libGL.a(arbconverter.c.obj): In function `gl4es_convertARB':

arbconverter.c:(.text+0x0): multiple definition of `gl4es_convertARB'

/SDK/local/newlib/lib/libGL.a(arbconverter.c.obj):arbconverter.c:(.text+0x0): first defined here

/SDK/local/newlib/lib/libGL.a(arbgenerator.c.obj): In function `generateVariablePre':

arbgenerator.c:(.text+0x0): multiple definition of `generateVariablePre'

/SDK/local/newlib/lib/libGL.a(arbgenerator.c.obj):arbgenerator.c:(.text+0x0): first defined here

/SDK/local/newlib/lib/libGL.a(arbgenerator.c.obj): In function `generateInstruction':

arbgenerator.c:(.text+0x4c0): multiple definition of `generateInstruction'

/SDK/local/newlib/lib/libGL.a(arbgenerator.c.obj):arbgenerator.c:(.text+0x4c0): first defined here

/SDK/local/newlib/lib/libGL.a(arbgenerator.c.obj): In function `generateVariablePst':

arbgenerator.c:(.text+0x57078): multiple definition of `generateVariablePst'

/SDK/local/newlib/lib/libGL.a(arbgenerator.c.obj):arbgenerator.c:(.text+0x57078): first defined here

/SDK/local/newlib/lib/libGL.a(arbhelper.c.obj): In function `resize':

arbhelper.c:(.text+0x0): multiple definition of `resize'

/SDK/local/newlib/lib/libGL.a(arbhelper.c.obj):arbhelper.c:(.text+0x0): first defined here

/SDK/local/newlib/lib/libGL.a(arbhelper.c.obj): In function `initArray':

arbhelper.c:(.text+0x74): multiple definition of `initArray'

/SDK/local/newlib/lib/libGL.a(arbhelper.c.obj):arbhelper.c:(.text+0x74): first defined here

/SDK/local/newlib/lib/libGL.a(arbhelper.c.obj): In function `pushArray':

I did rename
sdk:local/common/GL4ES to GL
sdk:local/newlib/lib/libgl4es.a to libgl.a
sdk:local/newlib/lib/libGLU_gl4es.a to libGLU.a
sdk:local/newlib/lib/libSDL2_gl4es.a to libSDL2.a

i suspect something stupendously easy to fix, but i can't get my head around what.
Something is missing...

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kas1e

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

Posted on: 2021/9/5 12:46 #771

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@Raziel

If you use GL4ES, then you of course can't link with libGL.a which is minigl. You should link with LIBgl4es.a or how it is called in the SDK of gl4es.

If you use SDL2, then you also should use libSDL2_gl4es.a , and link with it (and not with pure libSDL2.a).

Also to resolve all possible problems, just delete everything and start from scratch: rename your minigl GL headers from SDK on something like MGL_GL, create a new GL directory in the same place and put gl4es includes from.

Then, compile everything from scratch. IF all ok, then only linking left and there you should use all the same lbs as before but those which come with gl4es SDK should be replaced too (libSDL2_gl4es, libGLU if need it, etc).

I tried to cover gl4es SDK installation as much easy as possible in the readme, double-check if you follow 100% it.

All you need is to use the right includes, and right link libraries.

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Raziel

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

Posted on: 2021/9/5 14:17 #772

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@kas1e

I found out why it's not working anymore.

The first "working" one was done static.
Since then i switched to shared builds and it seems as if gles4 doesn't like to be mixed with shared libs, so...unfortunately i have to drop it.

Do you think, in the light of the latest shared library fixes, you could provide shared builds as well?

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kas1e

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

Posted on: 2021/9/5 14:43 #773

Home away from home

@Raziel
Quote:

The first "working" one was done static.

Was it anyhow better than minigl version in terms of speed?

Quote:

you could provide shared builds as well?

Not me, sorry. Maybe try to build it yourself with -use-dynld, to see if it by some luck will works, but i doubt.

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Raziel

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

Posted on: 2021/9/5 17:32 #774

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@kas1e

wrt speed...if you read one of my last mails i wrote that i never managed to make cummVM run with OpenGLES2.
It errored out with a missing screenmode...so, no

ok then, maybe ogles2 will be integrated into the system/sdk closer in the future, so i can drop all the renaming/library handling and see how that goes

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Capehill

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

Posted on: 2021/9/6 18:27 #775

Just can't stay away

@Raziel

Quote:

WARNING: Could not parse GL version 'OpenGL ES 2 3.1 on top of Warp3D Nova 1.85'!
WARNING: SDL Error: Invalid window!

https://github.com/scummvm/scummvm/blo ... s/opengl/context.cpp#L130

Current version string causes trouble to ScummVM which then sets major and minor to 0.

Maybe OGLES2 should return "OpenGL ES 2.0 + vendor specific".

Raziel

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

Posted on: 2021/9/7 22:40 #776

Home away from home

@Capehill

I'll try to do more checks and tests when I get some spare time again.
Probably lots of more questions coming up then too.

Thanks

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Raziel

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

Posted on: 2021/9/21 13:47 #777

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@Capehill

Could you tell me if this output is correct...so far?
I know that the shaders break, but that could be because shaders are still disabled by configure (have to still figure out why)


LIBGL: Initialising gl4es

LIBGL: v1.1.5 built on Apr 17 2021 23:02:30

LIBGL: Using GLES 2.0 backend

LIBGL: Using Warp3DNova.library v1 revision 85

LIBGL: Using OGLES2.library v3 revision 1

LIBGL: OGLES2 Library and Interface open successfuly

LIBGL: Targeting OpenGL 2.1

LIBGL: NPOT texture handled in hardware

LIBGL: Not trying to batch small subsequent glDrawXXXX

LIBGL: try to use VBO

LIBGL: Force texture for Attachment color0 on FBO

LIBGL: Hack to trigger a SwapBuffers when a Full Framebuffer Blit on default FBO is done

LIBGL: Current folder is:Games:ScummVM

LIBGL: Hardware test on current Context...

LIBGL: Hardware Full NPOT detected and used

LIBGL: Extension GL_EXT_blend_minmax  detected and used

LIBGL: FBO are in core, and so used

LIBGL: PointSprite are in core, and so used

LIBGL: CubeMap are in core, and so used

LIBGL: BlendColor is in core, and so used

LIBGL: Blend Substract is in core, and so used

LIBGL: Blend Function and Equation Separation is in core, and so used

LIBGL: Texture Mirrored Repeat is in core, and so used

LIBGL: Extension GL_OES_mapbuffer  detected

LIBGL: Extension GL_OES_element_index_uint  detected and used

LIBGL: Extension GL_OES_packed_depth_stencil  detected and used

LIBGL: Extension GL_EXT_texture_format_BGRA8888  detected and used

LIBGL: Extension GL_OES_texture_float  detected and used

LIBGL: Extension GL_AOS4_texture_format_RGB332 detected

LIBGL: Extension GL_AOS4_texture_format_RGB332REV detected

LIBGL: Extension GL_AOS4_texture_format_RGBA1555REV detected and used

LIBGL: Extension GL_AOS4_texture_format_RGBA8888 detected and used

LIBGL: Extension GL_AOS4_texture_format_RGBA8888REV detected and used

LIBGL: high precision float in fragment shader available and used

LIBGL: Extension GL_EXT_frag_depth  detected and used

LIBGL: Max vertex attrib: 16

LIBGL: Max texture size: 16384

LIBGL: Max Varying Vector: 32

LIBGL: Texture Units: 16/16 (hardware: 32), Max lights: 8, Max planes: 6

LIBGL: Extension GL_EXT_texture_filter_anisotropic  detected and used

LIBGL: Max Anisotropic filtering: 16

LIBGL: Max Color Attachments: 1 / Draw buffers: 1

LIBGL: Hardware vendor is A-EON Technology Ltd. Written by Daniel 'Daytona675x' Müßener @ GoldenCode.eu

LIBGL: GLSL 300 es supported

LIBGL: GLSL 310 es supported and used

WARNING: Could not parse GL version '2.1 gl4es wrapper 1.1.5'!

WARNING: GL ERROR: GL_INVALID_VALUE on glCompileShader(handle) (backends/graphics/opengl/shader.cpp:270)!

WARNING: Could not compile shader "attribute vec4 position;

attribute vec2 texCoordIn;

attribute vec4 blendColorIn;



uniform mat4 projection;



varying vec2 texCoord;

varying vec4 blendColor;



void main(void) {

    texCoord    = texCoordIn;

    blendColor  = blendColorIn;

    gl_Position = projection * position;

}

": "ERROR: 24:2: '' : missing #endif 

ERROR: 1 compilation errors.  No code generated.



"!

WARNING: GL ERROR: GL_INVALID_VALUE on glCompileShader(handle) (backends/graphics/opengl/shader.cpp:270)!

WARNING: Could not compile shader "attribute vec4 position;

attribute vec2 texCoordIn;

attribute vec4 blendColorIn;



uniform mat4 projection;



varying vec2 texCoord;

varying vec4 blendColor;



void main(void) {

    texCoord    = texCoordIn;

    blendColor  = blendColorIn;

    gl_Position = projection * position;

}

": "ERROR: 24:2: '' : missing #endif 

ERROR: 1 compilation errors.  No code generated.



"!

WARNING: Could not parse GL version '2.1 gl4es wrapper 1.1.5'!

WARNING: GL ERROR: GL_INVALID_VALUE on glCompileShader(handle) (backends/graphics/opengl/shader.cpp:270)!

WARNING: Could not compile shader "attribute vec4 position;

attribute vec2 texCoordIn;

attribute vec4 blendColorIn;



uniform mat4 projection;



varying vec2 texCoord;

varying vec4 blendColor;



void main(void) {

    texCoord    = texCoordIn;

    blendColor  = blendColorIn;

    gl_Position = projection * position;

}

": "ERROR: 24:2: '' : missing #endif 

ERROR: 1 compilation errors.  No code generated.



"!

WARNING: GL ERROR: GL_INVALID_VALUE on glCompileShader(handle) (backends/graphics/opengl/shader.cpp:270)!

WARNING: Could not compile shader "attribute vec4 position;

attribute vec2 texCoordIn;

attribute vec4 blendColorIn;



uniform mat4 projection;



varying vec2 texCoord;

varying vec4 blendColor;



void main(void) {

    texCoord    = texCoordIn;

    blendColor  = blendColorIn;

    gl_Position = projection * position;

}

": "ERROR: 24:2: '' : missing #endif 

ERROR: 1 compilation errors.  No code generated.



"!

LIBGL: Shuting down

I get a black screen/window with a white rectangle on the top right when running ScummVM.
Progress, but it doesn't seem to be there yet.

Also, i *have* to compile a static version, mixing shared and static doesn't work, so any ogles2 release will probably be a cross-compile (if there ever will be one, that is)

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Capehill

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

Posted on: 2021/9/21 16:51 #778

Just can't stay away

@Raziel

I don't know much about GL4ES...

I'm guessing the context type is wrong now: https://github.com/scummvm/scummvm/blo ... s/opengl/context.cpp#L124

It should be probably something else than "ES" variant to properly parse the GL version string which differs in normal OpenGL and OpenGLES. In GL4ES case you probably want to choose "normal" OpenGL somehow (is it via configure?).

Raziel

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

Posted on: 2021/9/21 20:19 #779

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@Capehill

Thank you

Every hint helps, i'll try to get in touch with the devs and see if our implementation is even supported

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kas1e

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

Posted on: 2021/9/22 7:45 #780

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@Raziel
GL4ES mean pure GL replacement so when you build anything with it means you should choose pure opengl. if you want OpenGL-ES then you need to use pure ogles2 directly without gl4es

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