From d9603be038b6d30f17ca7c05e60cc78100a625ac Mon Sep 17 00:00:00 2001 From: Frank Binns Date: Wed, 12 Aug 2015 16:36:00 +0100 Subject: [PATCH] egl: improve attribute checking for eglCreateContext The EGL 1.4 spec states for eglCreateContext: "attribute EGL_CONTEXT_CLIENT_VERSION is only valid when the current rendering API is EGL_OPENGL_ES_API" Additionally, if the EGL_KHR_create_context EGL extension is supported (this is mandatory in EGL 1.5) then the EGL_CONTEXT_MAJOR_VERSION_KHR, which is an alias for EGL_CONTEXT_CLIENT_VERSION, and EGL_CONTEXT_MINOR_VERSION_KHR attributes are also accepted by eglCreateContext with the extension spec stating: "The values for attributes EGL_CONTEXT_MAJOR_VERSION_KHR and EGL_CONTEXT_MINOR_VERSION_KHR specify the requested client API version. They are only meaningful for OpenGL and OpenGL ES contexts, and specifying them for other types of contexts will generate an error." Add the necessary checks against the extension and rendering APIs when validating these attributes as part of eglCreateContext. Signed-off-by: Frank Binns Reviewed-by: Matt Turner [Emil Velikov: Add newline before the spec quote (Matt)] Reviewed-by: Emil Velikov --- src/egl/main/eglcontext.c | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/src/egl/main/eglcontext.c b/src/egl/main/eglcontext.c index e767f4b1abe..588f48921f2 100644 --- a/src/egl/main/eglcontext.c +++ b/src/egl/main/eglcontext.c @@ -101,11 +101,42 @@ _eglParseContextAttribList(_EGLContext *ctx, _EGLDisplay *dpy, switch (attr) { case EGL_CONTEXT_CLIENT_VERSION: + /* The EGL 1.4 spec says: + * + * "attribute EGL_CONTEXT_CLIENT_VERSION is only valid when the + * current rendering API is EGL_OPENGL_ES_API" + * + * The EGL_KHR_create_context spec says: + * + * "EGL_CONTEXT_MAJOR_VERSION_KHR 0x3098 + * (this token is an alias for EGL_CONTEXT_CLIENT_VERSION)" + * + * "The values for attributes EGL_CONTEXT_MAJOR_VERSION_KHR and + * EGL_CONTEXT_MINOR_VERSION_KHR specify the requested client API + * version. They are only meaningful for OpenGL and OpenGL ES + * contexts, and specifying them for other types of contexts will + * generate an error." + */ + if ((api != EGL_OPENGL_ES_API && + (!dpy->Extensions.KHR_create_context || api != EGL_OPENGL_API))) { + err = EGL_BAD_ATTRIBUTE; + break; + } + ctx->ClientMajorVersion = val; break; case EGL_CONTEXT_MINOR_VERSION_KHR: - if (!dpy->Extensions.KHR_create_context) { + /* The EGL_KHR_create_context spec says: + * + * "The values for attributes EGL_CONTEXT_MAJOR_VERSION_KHR and + * EGL_CONTEXT_MINOR_VERSION_KHR specify the requested client API + * version. They are only meaningful for OpenGL and OpenGL ES + * contexts, and specifying them for other types of contexts will + * generate an error." + */ + if (!dpy->Extensions.KHR_create_context || + (api != EGL_OPENGL_ES_API && api != EGL_OPENGL_API)) { err = EGL_BAD_ATTRIBUTE; break; } -- 2.30.2