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e13a2d0814
Webrender encounters a shader compilation error when rendering video in firefox for android on intel based chromebooks. The error is due to a missing definition of textureSize(samplerExternalOES), which should be defined when using the OES_EGL_image_external_essl3 extension. However, these devices are running Mesa drivers, and due to a Mesa bug affecting versions 19 and earlier this was not defined. We already have a fallback path for devices which do not support OES_EGL_image_external_essl3: we use the ESSL 1.0 OES_EGL_image_external extension instead. This patch detects when we are running on Mesa 19 or earlier, and forces us to use the fallback path. Differential Revision: https://phabricator.services.mozilla.com/D127418