vo_rpi, vo_opengl: separate RPI/EGL-specific code for both VOs

This used to be shared, but since vo_rpi is going to be removed,
untangle them. There was barely any actual code shared since the recent
changes anyway.

As a subtle change, we also stop opening libGLESv2.so explicitly in the
vo_opengl backend, and use RTLD_DEFAULT instead.

3 files changed, 200 insertions, 220 deletions

diff --git a/video/out/opengl/context_rpi.c b/video/out/opengl/context_rpi.c
index ee2bacb939..5c9b81da01 100644
--- a/video/out/opengl/context_rpi.c
+++ b/video/out/opengl/context_rpi.c
@@ -18,199 +18,28 @@
 #include <stddef.h>
 #include <assert.h>
 
+#include <bcm_host.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
 #include "common/common.h"
 #include "osdep/atomic.h"
 #include "video/out/win_state.h"
 #include "context.h"
 #include "egl_helpers.h"
 
-#include "context_rpi.h"
-
-static void *get_proc_address(const GLubyte *name)
-{
-    void *p = eglGetProcAddress(name);
-    // EGL 1.4 (supported by the RPI firmware) does not necessarily return
-    // function pointers for core functions.
-    if (!p) {
-        void *h = dlopen("/opt/vc/lib/libGLESv2.so", RTLD_LAZY);
-        if (h) {
-            p = dlsym(h, name);
-            dlclose(h);
-        }
-    }
-    return p;
-}
-
-static EGLConfig select_fb_config_egl(struct mp_egl_rpi *p)
-{
-    EGLint attributes[] = {
-        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
-        EGL_RED_SIZE, 8,
-        EGL_GREEN_SIZE, 8,
-        EGL_BLUE_SIZE, 8,
-        EGL_DEPTH_SIZE, 0,
-        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
-        EGL_NONE
-    };
-
-    EGLint config_count;
-    EGLConfig config;
-
-    eglChooseConfig(p->egl_display, attributes, &config, 1, &config_count);
-
-    if (!config_count) {
-        MP_FATAL(p, "Could find EGL configuration!\n");
-        return NULL;
-    }
-
-    return config;
-}
-
-int mp_egl_rpi_init(struct mp_egl_rpi *p, DISPMANX_ELEMENT_HANDLE_T window,
-                    int w, int h)
-{
-    p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-    if (!eglInitialize(p->egl_display, NULL, NULL)) {
-        MP_FATAL(p, "EGL failed to initialize.\n");
-        goto fail;
-    }
-
-    eglBindAPI(EGL_OPENGL_ES_API);
-
-    EGLConfig config = select_fb_config_egl(p);
-    if (!config)
-        goto fail;
-
-    p->egl_window = (EGL_DISPMANX_WINDOW_T){
-        .element = window,
-        .width = w,
-        .height = h,
-    };
-    p->egl_surface = eglCreateWindowSurface(p->egl_display, config,
-                                            &p->egl_window, NULL);
-
-    if (p->egl_surface == EGL_NO_SURFACE) {
-        MP_FATAL(p, "Could not create EGL surface!\n");
-        goto fail;
-    }
-
-    EGLint context_attributes[] = {
-        EGL_CONTEXT_CLIENT_VERSION, 2,
-        EGL_NONE
-    };
-    p->egl_context = eglCreateContext(p->egl_display, config,
-                                      EGL_NO_CONTEXT, context_attributes);
-
-    if (p->egl_context == EGL_NO_CONTEXT) {
-        MP_FATAL(p, "Could not create EGL context!\n");
-        goto fail;
-    }
-
-    eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
-                   p->egl_context);
-
-    p->gl = talloc_zero(NULL, struct GL);
-
-    const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
-    mpgl_load_functions(p->gl, get_proc_address, exts, p->log);
-
-    if (!p->gl->version && !p->gl->es)
-        goto fail;
-
-    return 0;
-
-fail:
-    mp_egl_rpi_destroy(p);
-    return -1;
-}
-
-void mp_egl_rpi_destroy(struct mp_egl_rpi *p)
-{
-    if (p->egl_display) {
-        eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
-                       EGL_NO_CONTEXT);
-    }
-    if (p->egl_surface)
-        eglDestroySurface(p->egl_display, p->egl_surface);
-    if (p->egl_context)
-        eglDestroyContext(p->egl_display, p->egl_context);
-    p->egl_context = EGL_NO_CONTEXT;
-    eglReleaseThread();
-    p->egl_display = EGL_NO_DISPLAY;
-    talloc_free(p->gl);
-    p->gl = NULL;
-}
-
-static void mp_egl_rpi_destroy_base(struct mp_egl_rpi *p)
-{
-    if (p->egl_context)
-        eglDestroyContext(p->egl_display, p->egl_context);
-    p->egl_context = EGL_NO_CONTEXT;
-    eglReleaseThread();
-    p->egl_display = EGL_NO_DISPLAY;
-}
-
-static int mp_egl_rpi_init_base(struct mp_egl_rpi *p)
-{
-    p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-    if (!eglInitialize(p->egl_display, NULL, NULL)) {
-        MP_FATAL(p, "EGL failed to initialize.\n");
-        goto fail;
-    }
-
-    if (!mpegl_create_context(p->egl_display, p->log, 0, &p->egl_context,
-                              &p->egl_config))
-        goto fail;
-
-    return 0;
-
-fail:
-    mp_egl_rpi_destroy_base(p);
-    return -1;
-}
-
-static int mp_egl_rpi_init_window(struct mp_egl_rpi *p,
-                                  DISPMANX_ELEMENT_HANDLE_T window,
-                                  int w, int h)
-{
-    p->egl_window = (EGL_DISPMANX_WINDOW_T){
-        .element = window,
-        .width = w,
-        .height = h,
-    };
-    p->egl_surface = eglCreateWindowSurface(p->egl_display, p->egl_config,
-                                            &p->egl_window, NULL);
-
-    if (p->egl_surface == EGL_NO_SURFACE) {
-        MP_FATAL(p, "Could not create EGL surface!\n");
-        return -1;
-    }
-
-    if (!eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
-                        p->egl_context))
-    {
-        MP_FATAL(p, "Failed to set context!\n");
-        return -1;
-    }
-
-    return 0;
-}
-
-static void mp_egl_rpi_destroy_window(struct mp_egl_rpi *p)
-{
-    if (p->egl_surface) {
-        eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
-                       EGL_NO_CONTEXT);
-        eglDestroySurface(p->egl_display, p->egl_surface);
-        p->egl_surface = EGL_NO_SURFACE;
-    }
-}
-
 struct priv {
+    struct mp_log *log;
     DISPMANX_DISPLAY_HANDLE_T display;
     DISPMANX_ELEMENT_HANDLE_T window;
     DISPMANX_UPDATE_HANDLE_T update;
-    struct mp_egl_rpi egl;
+    EGLDisplay egl_display;
+    EGLConfig egl_config;
+    EGLContext egl_context;
+    EGLSurface egl_surface;
+    // yep, the API keeps a pointer to it
+    EGL_DISPMANX_WINDOW_T egl_window;
     int x, y, w, h;
     double display_fps;
     atomic_bool reload_display;
@@ -230,7 +59,13 @@ static void destroy_dispmanx(struct MPGLContext *ctx)
 {
     struct priv *p = ctx->priv;
 
-    mp_egl_rpi_destroy_window(&p->egl);
+    if (p->egl_surface) {
+        eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                       EGL_NO_CONTEXT);
+        eglDestroySurface(p->egl_display, p->egl_surface);
+        p->egl_surface = EGL_NO_SURFACE;
+    }
+
     if (p->window)
         vc_dispmanx_element_remove(p->update, p->window);
     p->window = 0;
@@ -248,9 +83,13 @@ static void rpi_uninit(MPGLContext *ctx)
 
     vc_tv_unregister_callback_full(tv_callback, ctx);
 
-    mp_egl_rpi_destroy_base(&p->egl);
-
     destroy_dispmanx(ctx);
+
+    if (p->egl_context)
+        eglDestroyContext(p->egl_display, p->egl_context);
+    p->egl_context = EGL_NO_CONTEXT;
+    eglReleaseThread();
+    p->egl_display = EGL_NO_DISPLAY;
 }
 
 static int recreate_dispmanx(struct MPGLContext *ctx)
@@ -310,8 +149,25 @@ static int recreate_dispmanx(struct MPGLContext *ctx)
     vc_dispmanx_update_submit_sync(p->update);
     p->update = vc_dispmanx_update_start(0);
 
-    if (mp_egl_rpi_init_window(&p->egl, p->window, p->w, p->h) < 0)
+    p->egl_window = (EGL_DISPMANX_WINDOW_T){
+        .element = p->window,
+        .width = p->w,
+        .height = p->h,
+    };
+    p->egl_surface = eglCreateWindowSurface(p->egl_display, p->egl_config,
+                                            &p->egl_window, NULL);
+
+    if (p->egl_surface == EGL_NO_SURFACE) {
+        MP_FATAL(p, "Could not create EGL surface!\n");
         goto fail;
+    }
+
+    if (!eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
+                        p->egl_context))
+    {
+        MP_FATAL(p, "Failed to set context!\n");
+        goto fail;
+    }
 
     p->display_fps = 0;
     TV_GET_STATE_RESP_T tvstate;
@@ -347,34 +203,51 @@ fail:
     return -1;
 }
 
+static void *get_proc_address(const GLubyte *name)
+{
+    void *p = eglGetProcAddress(name);
+    // EGL 1.4 (supported by the RPI firmware) does not necessarily return
+    // function pointers for core functions.
+    if (!p)
+        p = dlsym(RTLD_DEFAULT, name);
+    return p;
+}
+
 static int rpi_init(struct MPGLContext *ctx, int flags)
 {
     struct priv *p = ctx->priv;
+    p->log = ctx->vo->log;
 
     bcm_host_init();
 
     vc_tv_register_callback(tv_callback, ctx);
 
-    p->egl.log = ctx->vo->log;
-    if (mp_egl_rpi_init_base(&p->egl) < 0) {
-        rpi_uninit(ctx);
-        return -1;
+    p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (!eglInitialize(p->egl_display, NULL, NULL)) {
+        MP_FATAL(p, "EGL failed to initialize.\n");
+        goto fail;
     }
 
-    if (recreate_dispmanx(ctx) < 0) {
-        rpi_uninit(ctx);
-        return -1;
-    }
+    if (!mpegl_create_context(p->egl_display, p->log, 0, &p->egl_context,
+                              &p->egl_config))
+        goto fail;
+
+    if (recreate_dispmanx(ctx) < 0)
+        goto fail;
 
     ctx->gl = talloc_zero(ctx, GL);
 
-    const char *exts = eglQueryString(p->egl.egl_display, EGL_EXTENSIONS);
-    mpgl_load_functions(ctx->gl, get_proc_address, exts, p->egl.log);
+    const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
+    mpgl_load_functions(ctx->gl, get_proc_address, exts, p->log);
 
     ctx->native_display_type = "MPV_RPI_WINDOW";
     ctx->native_display = p->win_params;
 
     return 0;
+
+fail:
+    rpi_uninit(ctx);
+    return -1;
 }
 
 static int rpi_reconfig(struct MPGLContext *ctx)
@@ -385,7 +258,7 @@ static int rpi_reconfig(struct MPGLContext *ctx)
 static void rpi_swap_buffers(MPGLContext *ctx)
 {
     struct priv *p = ctx->priv;
-    eglSwapBuffers(p->egl.egl_display, p->egl.egl_surface);
+    eglSwapBuffers(p->egl_display, p->egl_surface);
 }
 
 static struct mp_image *take_screenshot(struct MPGLContext *ctx)
diff --git a/video/out/opengl/context_rpi.h b/video/out/opengl/context_rpi.h
deleted file mode 100644
index 60bd9c72d2..0000000000
--- a/video/out/opengl/context_rpi.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#include <bcm_host.h>
-
-#include <EGL/egl.h>
-#include <EGL/eglext.h>
-
-#include "common.h"
-
-struct mp_egl_rpi {
-    struct mp_log *log;
-    struct GL *gl;
-    EGLDisplay egl_display;
-    EGLConfig egl_config;
-    EGLContext egl_context;
-    EGLSurface egl_surface;
-    // yep, the API keeps a pointer to it
-    EGL_DISPMANX_WINDOW_T egl_window;
-};
-
-int mp_egl_rpi_init(struct mp_egl_rpi *p, DISPMANX_ELEMENT_HANDLE_T window,
-                    int w, int h);
-void mp_egl_rpi_destroy(struct mp_egl_rpi *p);
diff --git a/video/out/vo_rpi.c b/video/out/vo_rpi.c
index de5a8bf5e1..c046928f38 100644
--- a/video/out/vo_rpi.c
+++ b/video/out/vo_rpi.c
@@ -28,6 +28,9 @@
 #include <interface/mmal/util/mmal_default_components.h>
 #include <interface/mmal/vc/mmal_vc_api.h>
 
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
 #include <libavutil/rational.h>
 
 #include "common/common.h"
@@ -40,7 +43,17 @@
 #include "sub/osd.h"
 
 #include "opengl/osd.h"
-#include "opengl/context_rpi.h"
+
+struct mp_egl_rpi {
+    struct mp_log *log;
+    struct GL *gl;
+    EGLDisplay egl_display;
+    EGLConfig egl_config;
+    EGLContext egl_context;
+    EGLSurface egl_surface;
+    // yep, the API keeps a pointer to it
+    EGL_DISPMANX_WINDOW_T egl_window;
+};
 
 struct priv {
     DISPMANX_DISPLAY_HANDLE_T display;
@@ -89,6 +102,121 @@ struct priv {
 
 static void recreate_renderer(struct vo *vo);
 
+static void *get_proc_address(const GLubyte *name)
+{
+    void *p = eglGetProcAddress(name);
+    // EGL 1.4 (supported by the RPI firmware) does not necessarily return
+    // function pointers for core functions.
+    if (!p) {
+        void *h = dlopen("/opt/vc/lib/libGLESv2.so", RTLD_LAZY);
+        if (h) {
+            p = dlsym(h, name);
+            dlclose(h);
+        }
+    }
+    return p;
+}
+
+static EGLConfig select_fb_config_egl(struct mp_egl_rpi *p)
+{
+    EGLint attributes[] = {
+        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+        EGL_RED_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_BLUE_SIZE, 8,
+        EGL_DEPTH_SIZE, 0,
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+        EGL_NONE
+    };
+
+    EGLint config_count;
+    EGLConfig config;
+
+    eglChooseConfig(p->egl_display, attributes, &config, 1, &config_count);
+
+    if (!config_count) {
+        MP_FATAL(p, "Could find EGL configuration!\n");
+        return NULL;
+    }
+
+    return config;
+}
+
+static void mp_egl_rpi_destroy(struct mp_egl_rpi *p)
+{
+    if (p->egl_display) {
+        eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                       EGL_NO_CONTEXT);
+    }
+    if (p->egl_surface)
+        eglDestroySurface(p->egl_display, p->egl_surface);
+    if (p->egl_context)
+        eglDestroyContext(p->egl_display, p->egl_context);
+    p->egl_context = EGL_NO_CONTEXT;
+    eglReleaseThread();
+    p->egl_display = EGL_NO_DISPLAY;
+    talloc_free(p->gl);
+    p->gl = NULL;
+}
+
+static int mp_egl_rpi_init(struct mp_egl_rpi *p, DISPMANX_ELEMENT_HANDLE_T window,
+                    int w, int h)
+{
+    p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (!eglInitialize(p->egl_display, NULL, NULL)) {
+        MP_FATAL(p, "EGL failed to initialize.\n");
+        goto fail;
+    }
+
+    eglBindAPI(EGL_OPENGL_ES_API);
+
+    EGLConfig config = select_fb_config_egl(p);
+    if (!config)
+        goto fail;
+
+    p->egl_window = (EGL_DISPMANX_WINDOW_T){
+        .element = window,
+        .width = w,
+        .height = h,
+    };
+    p->egl_surface = eglCreateWindowSurface(p->egl_display, config,
+                                            &p->egl_window, NULL);
+
+    if (p->egl_surface == EGL_NO_SURFACE) {
+        MP_FATAL(p, "Could not create EGL surface!\n");
+        goto fail;
+    }
+
+    EGLint context_attributes[] = {
+        EGL_CONTEXT_CLIENT_VERSION, 2,
+        EGL_NONE
+    };
+    p->egl_context = eglCreateContext(p->egl_display, config,
+                                      EGL_NO_CONTEXT, context_attributes);
+
+    if (p->egl_context == EGL_NO_CONTEXT) {
+        MP_FATAL(p, "Could not create EGL context!\n");
+        goto fail;
+    }
+
+    eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
+                   p->egl_context);
+
+    p->gl = talloc_zero(NULL, struct GL);
+
+    const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
+    mpgl_load_functions(p->gl, get_proc_address, exts, p->log);
+
+    if (!p->gl->version && !p->gl->es)
+        goto fail;
+
+    return 0;
+
+fail:
+    mp_egl_rpi_destroy(p);
+    return -1;
+}
+
 // Make mpi point to buffer, assuming MMAL_ENCODING_I420.
 // buffer can be NULL.
 // Return the required buffer space.