forked from enlightenment/efl
evas gl: Add a hack for GLES 3.1 with NVIDIA + GLVND
I believe there's a limitation in libglvnd where it doesn't
propagate the calls to eglGetProcAddress() properly to the vendor
library.
See also 265c851a8f
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c68a409874
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@ -25,6 +25,7 @@
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}
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static void *_gles3_handle = NULL;
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static void *_gles3_handle_fallback = NULL;
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static Evas_GL_API _gles3_api;
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//---------------------------------------//
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// API Debug Error Checking Code
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@ -3366,8 +3367,49 @@ _evgl_load_gles3_apis(void *dl_handle, Evas_GL_API *funcs, int minor_version,
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if (minor_version > 0)
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{
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//GLES 3.1
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// OpenGL ES 3.1
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ret_value = EINA_TRUE;
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/* HACK for libglvnd (The GL Vendor-Neutral Dispatch library)
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*
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* For NVIDIA driver using libglvnd, GLES 3.0 symbols are exposed in
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* libGLESv2.so and properly forwarded to libGLESv2_nvidia.so.
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*
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* But for GLES 3.1+ the symbols are not present in libGLESv2.so so
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* the following dlsym() would invariably fail. eglGetProcAddress also
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* fails to find the symbols. I believe this is a bug in libglvnd's
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* libEGL.so, as it should be finding the symbol in nvidia's library.
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*
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* So we try here to link directly to the vendor library. This is ugly,
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* but this makes GLES 3.1 work.
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*
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* FIXME: This hack should be removed when libglvnd fixes support
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* for GLES 3.1+ properly.
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*/
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funcs->glDispatchCompute = dlsym(dl_handle, "glDispatchCompute");
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if (!funcs->glDispatchCompute && get_proc_address)
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get_proc_address("glDispatchCompute");
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#ifdef GL_GLES
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if (!funcs->glDispatchCompute)
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{
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const char *vendor;
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vendor = (const char *) funcs->glGetString(GL_VENDOR);
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if (!vendor) return ret_value;
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// FIXME: Add other support for other vendors
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if (!strcmp(vendor, "NVIDIA Corporation"))
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_gles3_handle_fallback = dlopen("libGLESv2_nvidia.so", RTLD_NOW);
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if (!_gles3_handle_fallback) return ret_value;
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dl_handle = _gles3_handle_fallback;
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get_proc_address = NULL;
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}
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#else
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if (!funcs->glDispatchCompute) return ret_value;
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#endif
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ORD(glDispatchCompute);
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ORD(glDispatchComputeIndirect);
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ORD(glDrawArraysIndirect);
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