egl: deduplicate allocations of local buffer over each platform backend (v2)

[mesa.git] / src / egl / drivers / dri2 / egl_dri2.c

diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 125943333bea837122d530d5b28f7d8b4c5b42d2..aa6f02a34b5a744b637932c5d53f38cad5c6fc62 100644 (file)
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -1011,6 +1011,40 @@ dri2_display_destroy(_EGLDisplay *disp)
    disp->DriverData = NULL;
 }
 
+__DRIbuffer *
+dri2_egl_surface_alloc_local_buffer(struct dri2_egl_surface *dri2_surf,
+                                    unsigned int att, unsigned int format)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+
+   if (att >= ARRAY_SIZE(dri2_surf->local_buffers))
+      return NULL;
+
+   if (!dri2_surf->local_buffers[att]) {
+      dri2_surf->local_buffers[att] =
+         dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen, att, format,
+                                        dri2_surf->base.Width, dri2_surf->base.Height);
+   }
+
+   return dri2_surf->local_buffers[att];
+}
+
+void
+dri2_egl_surface_free_local_buffers(struct dri2_egl_surface *dri2_surf)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+
+   for (int i = 0; i < ARRAY_SIZE(dri2_surf->local_buffers); i++) {
+      if (dri2_surf->local_buffers[i]) {
+         dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
+                                       dri2_surf->local_buffers[i]);
+         dri2_surf->local_buffers[i] = NULL;
+      }
+   }
+}
+
 /**
  * Called via eglTerminate(), drv->API.Terminate().
  *