vo_opengl: GLES 3 support

Tested with MESA on software emulation. Seems to work well, although the
default FBO format in opengl-hq disables most interesting features. I
have no idea how well it will work on real hardware (or if it does at
all).

Unfortunately, some features, including playback of 10 bit video, are
not supported. Not sure what to do about this.

GLES 2 or 1 do not work.

1 files changed, 29 insertions, 8 deletions

diff --git a/video/out/gl_x11egl.c b/video/out/gl_x11egl.c
index 9732774994..8f2a5e4ffa 100644
--- a/video/out/gl_x11egl.c
+++ b/video/out/gl_x11egl.c
@@ -34,7 +34,7 @@ struct priv {
     EGLSurface egl_surface;
 };
 
-static EGLConfig select_fb_config_egl(struct MPGLContext *ctx)
+static EGLConfig select_fb_config_egl(struct MPGLContext *ctx, bool es)
 {
     struct priv *p = ctx->priv;
 
@@ -44,7 +44,7 @@ static EGLConfig select_fb_config_egl(struct MPGLContext *ctx)
         EGL_GREEN_SIZE, 8,
         EGL_BLUE_SIZE, 8,
         EGL_DEPTH_SIZE, 0,
-        EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
+        EGL_RENDERABLE_TYPE, es ? EGL_OPENGL_ES_BIT : EGL_OPENGL_BIT,
         EGL_NONE
     };
 
@@ -62,13 +62,13 @@ static EGLConfig select_fb_config_egl(struct MPGLContext *ctx)
 }
 
 static bool create_context_egl(MPGLContext *ctx, EGLConfig config,
-                                EGLNativeWindowType window)
+                               EGLNativeWindowType window, bool es)
 {
     struct priv *p = ctx->priv;
 
     EGLint context_attributes[] = {
         EGL_CONTEXT_MAJOR_VERSION_KHR,
-        MPGL_VER_GET_MAJOR(ctx->requested_gl_version),
+        es ? 3 : MPGL_VER_GET_MAJOR(ctx->requested_gl_version),
         EGL_NONE
     };
 
@@ -93,7 +93,7 @@ static bool create_context_egl(MPGLContext *ctx, EGLConfig config,
     return true;
 }
 
-static bool config_window_x11_egl(struct MPGLContext *ctx, int flags)
+static bool config_window_x11_egl_(struct MPGLContext *ctx, int flags, bool es)
 {
     struct priv *p = ctx->priv;
     struct vo *vo = ctx->vo;
@@ -103,12 +103,12 @@ static bool config_window_x11_egl(struct MPGLContext *ctx, int flags)
         return true;
     }
 
-    eglBindAPI(EGL_OPENGL_API);
+    eglBindAPI(es ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
 
     p->egl_display = eglGetDisplay(vo->x11->display);
     eglInitialize(p->egl_display, NULL, NULL);
 
-    EGLConfig config = select_fb_config_egl(ctx);
+    EGLConfig config = select_fb_config_egl(ctx, es);
     if (!config)
         return false;
 
@@ -126,7 +126,7 @@ static bool config_window_x11_egl(struct MPGLContext *ctx, int flags)
 
     XFree(vi);
 
-    if (!create_context_egl(ctx, config, (EGLNativeWindowType)vo->x11->window))
+    if (!create_context_egl(ctx, config, (EGLNativeWindowType)vo->x11->window, es))
     {
         vo_x11_uninit(ctx->vo);
         return false;
@@ -138,6 +138,16 @@ static bool config_window_x11_egl(struct MPGLContext *ctx, int flags)
     return true;
 }
 
+static bool config_window_x11_egl(struct MPGLContext *ctx, int flags)
+{
+    return config_window_x11_egl_(ctx, flags, false);
+}
+
+static bool config_window_x11_egles(struct MPGLContext *ctx, int flags)
+{
+    return config_window_x11_egl_(ctx, flags, true);
+}
+
 static void releaseGlContext_egl(MPGLContext *ctx)
 {
     struct priv *p = ctx->priv;
@@ -165,3 +175,14 @@ void mpgl_set_backend_x11egl(MPGLContext *ctx)
     ctx->vo_uninit = vo_x11_uninit;
     ctx->vo_control = vo_x11_control;
 }
+
+void mpgl_set_backend_x11egles(MPGLContext *ctx)
+{
+    ctx->priv = talloc_zero(ctx, struct priv);
+    ctx->config_window = config_window_x11_egles;
+    ctx->releaseGlContext = releaseGlContext_egl;
+    ctx->swapGlBuffers = swapGlBuffers_egl;
+    ctx->vo_init = vo_x11_init;
+    ctx->vo_uninit = vo_x11_uninit;
+    ctx->vo_control = vo_x11_control;
+}