1 files changed, 107 insertions, 0 deletions
diff --git a/video/filter/vf_gpu_egl.c b/video/filter/vf_gpu_egl.c
new file mode 100644
index 0000000000..cd90a6e06a
--- /dev/null
+++ b/video/filter/vf_gpu_egl.c
@@ -0,0 +1,107 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "common/common.h"
+#include "video/filter/vf_gpu.h"
+#include "video/out/opengl/egl_helpers.h"
+#include "video/out/opengl/ra_gl.h"
+
+struct gl_offscreen_ctx {
+    GL gl;
+    EGLDisplay egl_display;
+    EGLContext egl_context;
+};
+
+static void gl_ctx_destroy(void *p)
+{
+    struct offscreen_ctx *ctx = p;
+    struct gl_offscreen_ctx *gl = ctx->priv;
+
+    ra_free(&ctx->ra);
+
+    if (gl->egl_context)
+        eglDestroyContext(gl->egl_display, gl->egl_context);
+}
+
+static void gl_ctx_set_context(struct offscreen_ctx *ctx, bool enable)
+{
+    struct gl_offscreen_ctx *gl = ctx->priv;
+    EGLContext c = enable ? gl->egl_context : EGL_NO_CONTEXT;
+
+    if (!eglMakeCurrent(gl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, c))
+        MP_ERR(ctx, "Could not make EGL context current.\n");
+}
+
+static struct offscreen_ctx *gl_offscreen_ctx_create(struct mpv_global *global,
+                                                     struct mp_log *log)
+{
+    struct offscreen_ctx *ctx = talloc(NULL, struct offscreen_ctx);
+    struct gl_offscreen_ctx *gl = talloc_zero(ctx, struct gl_offscreen_ctx);
+    talloc_set_destructor(ctx, gl_ctx_destroy);
+    *ctx = (struct offscreen_ctx){
+        .log = log,
+        .priv = gl,
+        .set_context = gl_ctx_set_context,
+    };
+
+    // This appears to work with Mesa. EGL 1.5 doesn't specify what a "default
+    // display" is at all.
+    gl->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (!eglInitialize(gl->egl_display, NULL, NULL)) {
+        MP_ERR(ctx, "Could not initialize EGL.\n");
+        goto error;
+    }
+
+    // Unfortunately, mpegl_create_context() is entangled with ra_ctx.
+    // Fortunately, it does not need much, and we can provide a stub.
+    struct ra_ctx ractx = {
+        .log = ctx->log,
+        .global = global,
+    };
+    EGLConfig config;
+    if (!mpegl_create_context(&ractx, gl->egl_display, &gl->egl_context, &config))
+    {
+        MP_ERR(ctx, "Could not create EGL context.\n");
+        goto error;
+    }
+
+    if (!eglMakeCurrent(gl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                        gl->egl_context))
+    {
+        MP_ERR(ctx, "Could not make EGL context current.\n");
+        goto error;
+    }
+
+    mpegl_load_functions(&gl->gl, ctx->log);
+    ctx->ra = ra_create_gl(&gl->gl, ctx->log);
+
+    if (!ctx->ra)
+        goto error;
+
+    gl_ctx_set_context(ctx, false);
+
+    return ctx;
+
+error:
+    talloc_free(ctx);
+    return NULL;
+}
+
+const struct offscreen_context offscreen_egl = {
+    .api = "egl",
+    .offscreen_ctx_create = gl_offscreen_ctx_create
+};