OpenGLES 3 / OpenGLES 3.1

[danoli3]

OpenGLES 3

• Merged in @mruegenberg changes and patched them into the core.
• Support for openGLES 3.0
• Support for openGLES 3.1
• Fixed up Emscripten defines to allow for ES3
• This feature allows for emulation more easily in Dawn / Emscripten / Metal / Vulkan for Mobile platforms for ES

[danoli3]

Quick review looks good need to check if no regression

[ofTheo]

Looks like a big change to quite a few files.
Once it's passing the tests, we should test this branch with the examples before merging.

cc @NickHardeman @dimitre @artificiel @2bbb

[danoli3]

I keep testing the different examples in macOS. All good so far.

I cherry picked ancient code so will paste over latest formatting soon

Some core changes to ofFbo / ofGLProgrammableRender / ofShadow / ofMaterial / ofGLUtils etc

Critical changes to support Emscripten though

[danoli3]

ES3 working on iOS via iOSES3ShaderExample

[danoli3]

OpenGL ES2 / OpenGLES 1 shaders working

[dimitre]

one question here:
if TARGET_OPENGLES is also set when GL_ES_VERSION_3_0 is true, would this avoid changing lots of if defined in core? or am I missing something?

[danoli3]

Yes it pretty much would always be defined then, need to modify this to is defined and defined enabled like TARGET_OPENGLES_3 that can be user controlled

So far it builds though for iOS and runs with ES3 or ES2 or even ES1 based on main.mm / window

OpenGLES 3 target is best though for dawn or ANGLE auto to Metal / Vulkan btw

[danoli3]

#ifdef TARGET_OPENGLES
	#if !defined(TARGET_OPENGLES_3)
        #if defined(GL_ES_VERSION_3_0) || \
            (defined(TARGET_EMSCRIPTEN) && defined(USE_WEBGL2)) || \
            defined(TARGET_OPENGLES_3_1) || defined(TARGET_OPENGLES_3_2)
            #define TARGET_OPENGLES_3
            #if defined(GL_ES_VERSION_3_1)
            	#define TARGET_OPENGLES_3_1
            #endif
            #if defined(GL_ES_VERSION_3_2)
            	#define TARGET_OPENGLES_3_2
            #endif
        #endif
    #endif
    // User can force-disable GLES3
    #if defined(TARGET_FORCE_GLES_2) || defined(TARGET_FORCE_GLES_1)
        #undef TARGET_OPENGLES_3
        #undef TARGET_OPENGLES_3_1
        #undef TARGET_OPENGLES_3_2
    #endif
#endif

Added an undef if needed. OpenGL ES1 and ES2 should be easily controlled now if required. It was still working with ES1 and ES2 on iOS tests though. More strict control for older projects though

[danoli3]

trying 3d primitive example in OpenGL 3.2 (programmable) getting the same error I was getting on emscripten

is that happening on master @ofTheo

3DPrimitivesExample

#include "ofApp.h"

//--------------------------------------------------------------
int main(){

	//Use ofGLFWWindowSettings for more options like multi-monitor fullscreen
	ofGLWindowSettings settings;
	settings.setSize(1024, 768);
	settings.windowMode = OF_WINDOW; //can also be OF_FULLSCREEN
	settings.setGLVersion(3, 2);
	auto window = ofCreateWindow(settings);

	ofRunApp(window, std::make_shared<ofApp>());
	ofRunMainLoop();

}