From 67ce9813d69dfbad7faf5e3ec8dfab0ee5e5e388 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 26 Apr 2018 19:10:56 +0200
Subject: egl_helpers: log certain EGL attributes

Might be helpful with broken EGL implementations.
---
 video/out/opengl/egl_helpers.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/video/out/opengl/egl_helpers.c b/video/out/opengl/egl_helpers.c
index 8f8a7fee3b..a3b9c65059 100644
--- a/video/out/opengl/egl_helpers.c
+++ b/video/out/opengl/egl_helpers.c
@@ -44,6 +44,38 @@
 #define EGL_OPENGL_ES3_BIT                      0x00000040
 #endif
 
+struct mp_egl_config_attr {
+    int attrib;
+    const char *name;
+};
+
+#define MP_EGL_ATTRIB(id) {id, # id}
+
+static const struct mp_egl_config_attr mp_egl_attribs[] = {
+    MP_EGL_ATTRIB(EGL_CONFIG_ID),
+    MP_EGL_ATTRIB(EGL_RED_SIZE),
+    MP_EGL_ATTRIB(EGL_GREEN_SIZE),
+    MP_EGL_ATTRIB(EGL_BLUE_SIZE),
+    MP_EGL_ATTRIB(EGL_ALPHA_SIZE),
+    MP_EGL_ATTRIB(EGL_COLOR_BUFFER_TYPE),
+    MP_EGL_ATTRIB(EGL_CONFIG_CAVEAT),
+    MP_EGL_ATTRIB(EGL_CONFORMANT),
+};
+
+static void dump_egl_config(struct mp_log *log, int msgl, EGLDisplay display,
+                            EGLConfig config)
+{
+    for (int n = 0; n < MP_ARRAY_SIZE(mp_egl_attribs); n++) {
+        const char *name = mp_egl_attribs[n].name;
+        EGLint v = -1;
+        if (eglGetConfigAttrib(display, config, mp_egl_attribs[n].attrib, &v)) {
+            mp_msg(log, msgl, "  %s=%d\n", name, v);
+        } else {
+            mp_msg(log, msgl, "  %s=<error>\n", name);
+        }
+    }
+}
+
 // es_version: 0 (core), 2 or 3
 static bool create_context(struct ra_ctx *ctx, EGLDisplay display,
                            int es_version, struct mpegl_cb cb,
@@ -105,6 +137,9 @@ static bool create_context(struct ra_ctx *ctx, EGLDisplay display,
         return false;
     }
 
+    for (int n = 0; n < num_configs; n++)
+        dump_egl_config(ctx->log, MSGL_TRACE, display, configs[n]);
+
     int chosen = 0;
     if (cb.refine_config)
         chosen = cb.refine_config(cb.user_data, configs, num_configs);
@@ -117,6 +152,9 @@ static bool create_context(struct ra_ctx *ctx, EGLDisplay display,
 
     talloc_free(configs);
 
+    MP_DBG(ctx, "Chosen EGLConfig:\n");
+    dump_egl_config(ctx->log, MSGL_DEBUG, display, config);
+
     EGLContext *egl_ctx = NULL;
 
     if (es_version) {
-- 
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