[Qemu-devel] [PATCH 5/6] sdl2: add scanout_disable support

[Gerd Hoffmann <kraxel@redhat.com>]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/sdl2.h |  1 +
 ui/sdl2-gl.c      | 16 +++++++++++-----
 ui/sdl2.c         |  1 +
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/ui/sdl2.h b/include/ui/sdl2.h
index 2de792f..aaf226c 100644
--- a/include/ui/sdl2.h
+++ b/include/ui/sdl2.h
@@ -62,6 +62,7 @@ int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
                                  QEMUGLContext ctx);
 QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl);
 
+void sdl2_gl_scanout_disable(DisplayChangeListener *dcl);
 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
                              uint32_t backing_id,
                              bool backing_y_0_top,
diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
index e25aa3b..1cd77e2 100644
--- a/ui/sdl2-gl.c
+++ b/ui/sdl2-gl.c
@@ -184,6 +184,17 @@ QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
     return (QEMUGLContext)sdlctx;
 }
 
+void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
+{
+    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+
+    assert(scon->opengl);
+    scon->w = 0;
+    scon->h = 0;
+    scon->tex_id = 0;
+    sdl2_set_scanout_mode(scon, false);
+}
+
 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
                              uint32_t backing_id,
                              bool backing_y_0_top,
@@ -204,11 +215,6 @@ void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
 
     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 
-    if (scon->tex_id == 0 || scon->w == 0 || scon->h == 0) {
-        sdl2_set_scanout_mode(scon, false);
-        return;
-    }
-
     sdl2_set_scanout_mode(scon, true);
     if (!scon->fbo_id) {
         glGenFramebuffers(1, &scon->fbo_id);
diff --git a/ui/sdl2.c b/ui/sdl2.c
index febda80..faf9bdf 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -733,6 +733,7 @@ static const DisplayChangeListenerOps dcl_gl_ops = {
     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
+    .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
     .dpy_gl_update           = sdl2_gl_scanout_flush,
 };
-- 
1.8.3.1