Ozone integration.

ui/ozone/platform/drm/gpu/hardware_display_plane_manager_legacy.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/ozone/platform/drm/gpu/hardware_display_plane_manager_legacy.h"
+
+#include "base/bind.h"
+#include "ui/ozone/platform/drm/gpu/crtc_controller.h"
+#include "ui/ozone/platform/drm/gpu/drm_device.h"
+#include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
+
+namespace ui {
+
+HardwareDisplayPlaneManagerLegacy::HardwareDisplayPlaneManagerLegacy() {
+}
+
+HardwareDisplayPlaneManagerLegacy::~HardwareDisplayPlaneManagerLegacy() {
+}
+
+bool HardwareDisplayPlaneManagerLegacy::Commit(
+    HardwareDisplayPlaneList* plane_list,
+    bool is_sync,
+    bool test_only) {
+  if (test_only) {
+    for (HardwareDisplayPlane* plane : plane_list->plane_list) {
+      plane->set_in_use(false);
+    }
+    plane_list->plane_list.clear();
+    plane_list->legacy_page_flips.clear();
+    return true;
+  }
+  if (plane_list->plane_list.empty())  // No assigned planes, nothing to do.
+    return true;
+  bool ret = true;
+  // The order of operations here (set new planes, pageflip, clear old planes)
+  // is designed to minimze the chance of a significant artifact occurring.
+  // The planes must be updated first because the main plane no longer contains
+  // their content. The old planes are removed last because the previous primary
+  // plane used them as overlays and thus didn't contain their content, so we
+  // must first flip to the new primary plane, which does. The error here will
+  // be the delta of (new contents, old contents), but it should be barely
+  // noticeable.
+  for (const auto& flip : plane_list->legacy_page_flips) {
+    // Permission Denied is a legitimate error
+    for (const auto& plane : flip.planes) {
+      if (!drm_->PageFlipOverlay(flip.crtc_id, plane.framebuffer, plane.bounds,
+                                 plane.src_rect, plane.plane)) {
+        PLOG(ERROR) << "Cannot display plane on overlay: crtc=" << flip.crtc
+                    << " plane=" << plane.plane;
+        ret = false;
+        flip.crtc->PageFlipFailed();
+        break;
+      }
+    }
+    if (!drm_->PageFlip(flip.crtc_id, flip.framebuffer, is_sync,
+                        base::Bind(&CrtcController::OnPageFlipEvent,
+                                   flip.crtc->AsWeakPtr()))) {
+      if (errno != EACCES) {
+        PLOG(ERROR) << "Cannot page flip: crtc=" << flip.crtc_id
+                    << " framebuffer=" << flip.framebuffer
+                    << " is_sync=" << is_sync;
+        ret = false;
+      }
+      flip.crtc->PageFlipFailed();
+    }
+  }
+  // For each element in |old_plane_list|, if it hasn't been reclaimed (by
+  // this or any other HDPL), clear the overlay contents.
+  for (HardwareDisplayPlane* plane : plane_list->old_plane_list) {
+    if (!plane->in_use() && !plane->is_dummy()) {
+      // This plane is being released, so we need to zero it.
+      if (!drm_->PageFlipOverlay(plane->owning_crtc(), 0, gfx::Rect(),
+                                 gfx::Rect(), plane->plane_id())) {
+        PLOG(ERROR) << "Cannot free overlay: crtc=" << plane->owning_crtc()
+                    << " plane=" << plane->plane_id();
+        ret = false;
+        break;
+      }
+    }
+  }
+  plane_list->plane_list.swap(plane_list->old_plane_list);
+  plane_list->plane_list.clear();
+  plane_list->legacy_page_flips.clear();
+  return ret;
+}
+
+bool HardwareDisplayPlaneManagerLegacy::SetPlaneData(
+    HardwareDisplayPlaneList* plane_list,
+    HardwareDisplayPlane* hw_plane,
+    const OverlayPlane& overlay,
+    uint32_t crtc_id,
+    const gfx::Rect& src_rect,
+    CrtcController* crtc) {
+  if (hw_plane->is_dummy() || plane_list->legacy_page_flips.empty() ||
+      plane_list->legacy_page_flips.back().crtc_id != crtc_id) {
+    plane_list->legacy_page_flips.push_back(
+        HardwareDisplayPlaneList::PageFlipInfo(
+            crtc_id, overlay.buffer->GetFramebufferId(), crtc));
+  } else {
+    plane_list->legacy_page_flips.back().planes.push_back(
+        HardwareDisplayPlaneList::PageFlipInfo::Plane(
+            hw_plane->plane_id(), overlay.buffer->GetFramebufferId(),
+            overlay.display_bounds, src_rect));
+  }
+  return true;
+}
+
+}  // namespace ui