vo_opengl: refactor into vo_gpu

This is done in several steps:

1. refactor MPGLContext -> struct ra_ctx
2. move GL-specific stuff in vo_opengl into opengl/context.c
3. generalize context creation to support other APIs, and add --gpu-api
4. rename all of the --opengl- options that are no longer opengl-specific
5. move all of the stuff from opengl/* that isn't GL-specific into gpu/
   (note: opengl/gl_utils.h became opengl/utils.h)
6. rename vo_opengl to vo_gpu
7. to handle window screenshots, the short-term approach was to just add
   it to ra_swchain_fns. Long term (and for vulkan) this has to be moved to
   ra itself (and vo_gpu altered to compensate), but this was a stop-gap
   measure to prevent this commit from getting too big
8. move ra->fns->flush to ra_gl_ctx instead
9. some other minor changes that I've probably already forgotten

Note: This is one half of a major refactor, the other half of which is
provided by rossy's following commit. This commit enables support for
all linux platforms, while his version enables support for all non-linux
platforms.

Note 2: vo_opengl_cb.c also re-uses ra_gl_ctx so it benefits from the
--opengl- options like --opengl-early-flush, --opengl-finish etc. Should
be a strict superset of the old functionality.

Disclaimer: Since I have no way of compiling mpv on all platforms, some
of these ports were done blindly. Specifically, the blind ports included
context_mali_fbdev.c and context_rpi.c. Since they're both based on
egl_helpers, the port should have gone smoothly without any major
changes required. But if somebody complains about a compile error on
those platforms (assuming anybody actually uses them), you know where to
complain.

1 files changed, 8 insertions, 11 deletions

diff --git a/video/out/opengl/egl_helpers.h b/video/out/opengl/egl_helpers.h
index 05f9dccb70..eaaf9d7a48 100644
--- a/video/out/opengl/egl_helpers.h
+++ b/video/out/opengl/egl_helpers.h
@@ -6,26 +6,23 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
+#include "video/out/gpu/context.h"
+
 struct mp_log;
 
-bool mpegl_create_context(EGLDisplay display, struct mp_log *log, int vo_flags,
+bool mpegl_create_context(struct ra_ctx *ctx, EGLDisplay display,
                           EGLContext *out_context, EGLConfig *out_config);
 
-struct mpegl_opts {
-    // combination of VOFLAG_* values.
-    int vo_flags;
-
-    // for callbacks
-    void *user_data;
-
+struct mpegl_cb {
     // if set, pick the desired config from the given list and return its index
     // defaults to 0 (they are sorted by eglChooseConfig)
     int (*refine_config)(void *user_data, EGLConfig *configs, int num_configs);
+    void *user_data;
 };
 
-bool mpegl_create_context_opts(EGLDisplay display, struct mp_log *log,
-                               struct mpegl_opts *opts,
-                               EGLContext *out_context, EGLConfig *out_config);
+bool mpegl_create_context_cb(struct ra_ctx *ctx, EGLDisplay display,
+                             struct mpegl_cb cb, EGLContext *out_context,
+                             EGLConfig *out_config);
 
 struct GL;
 void mpegl_load_functions(struct GL *gl, struct mp_log *log);