1 files changed, 166 insertions, 0 deletions
diff --git a/compositor/Planner.cpp b/compositor/Planner.cpp
new file mode 100644
index 0000000..f4b5c51
--- /dev/null
+++ b/compositor/Planner.cpp
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "hwc-platform"
+
+#include "Planner.h"
+
+#include <log/log.h>
+
+#include "drm/DrmDevice.h"
+
+namespace android {
+
+std::unique_ptr<Planner> Planner::CreateInstance(DrmDevice *) {
+  std::unique_ptr<Planner> planner(new Planner);
+  planner->AddStage<PlanStageGreedy>();
+  return planner;
+}
+
+std::vector<DrmPlane *> Planner::GetUsablePlanes(
+    DrmCrtc *crtc, std::vector<DrmPlane *> *primary_planes,
+    std::vector<DrmPlane *> *overlay_planes) {
+  std::vector<DrmPlane *> usable_planes;
+  std::copy_if(primary_planes->begin(), primary_planes->end(),
+               std::back_inserter(usable_planes),
+               [=](DrmPlane *plane) { return plane->GetCrtcSupported(*crtc); });
+  std::copy_if(overlay_planes->begin(), overlay_planes->end(),
+               std::back_inserter(usable_planes),
+               [=](DrmPlane *plane) { return plane->GetCrtcSupported(*crtc); });
+  return usable_planes;
+}
+
+int Planner::PlanStage::ValidatePlane(DrmPlane *plane, DrmHwcLayer *layer) {
+  int ret = 0;
+  uint64_t blend;
+
+  if ((plane->rotation_property().id() == 0) &&
+      layer->transform != DrmHwcTransform::kIdentity) {
+    ALOGE("Rotation is not supported on plane %d", plane->id());
+    return -EINVAL;
+  }
+
+  if (plane->alpha_property().id() == 0 && layer->alpha != 0xffff) {
+    ALOGE("Alpha is not supported on plane %d", plane->id());
+    return -EINVAL;
+  }
+
+  if (plane->blend_property().id() == 0) {
+    if ((layer->blending != DrmHwcBlending::kNone) &&
+        (layer->blending != DrmHwcBlending::kPreMult)) {
+      ALOGE("Blending is not supported on plane %d", plane->id());
+      return -EINVAL;
+    }
+  } else {
+    switch (layer->blending) {
+      case DrmHwcBlending::kPreMult:
+        std::tie(blend, ret) = plane->blend_property().GetEnumValueWithName(
+            "Pre-multiplied");
+        break;
+      case DrmHwcBlending::kCoverage:
+        std::tie(blend, ret) = plane->blend_property().GetEnumValueWithName(
+            "Coverage");
+        break;
+      case DrmHwcBlending::kNone:
+      default:
+        std::tie(blend,
+                 ret) = plane->blend_property().GetEnumValueWithName("None");
+        break;
+    }
+    if (ret)
+      ALOGE("Expected a valid blend mode on plane %d", plane->id());
+  }
+
+  uint32_t format = layer->buffer->format;
+  if (!plane->IsFormatSupported(format)) {
+    ALOGE("Plane %d does not supports %c%c%c%c format", plane->id(), format,
+          format >> 8, format >> 16, format >> 24);
+    return -EINVAL;
+  }
+
+  return ret;
+}
+
+std::tuple<int, std::vector<DrmCompositionPlane>> Planner::ProvisionPlanes(
+    std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
+    std::vector<DrmPlane *> *primary_planes,
+    std::vector<DrmPlane *> *overlay_planes) {
+  std::vector<DrmCompositionPlane> composition;
+  std::vector<DrmPlane *> planes = GetUsablePlanes(crtc, primary_planes,
+                                                   overlay_planes);
+  if (planes.empty()) {
+    ALOGE("Display %d has no usable planes", crtc->display());
+    return std::make_tuple(-ENODEV, std::vector<DrmCompositionPlane>());
+  }
+
+  // Go through the provisioning stages and provision planes
+  for (auto &i : stages_) {
+    int ret = i->ProvisionPlanes(&composition, layers, crtc, &planes);
+    if (ret) {
+      ALOGE("Failed provision stage with ret %d", ret);
+      return std::make_tuple(ret, std::vector<DrmCompositionPlane>());
+    }
+  }
+
+  return std::make_tuple(0, std::move(composition));
+}
+
+int PlanStageProtected::ProvisionPlanes(
+    std::vector<DrmCompositionPlane> *composition,
+    std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
+    std::vector<DrmPlane *> *planes) {
+  int ret;
+  int protected_zorder = -1;
+  for (auto i = layers.begin(); i != layers.end();) {
+    if (!i->second->protected_usage()) {
+      ++i;
+      continue;
+    }
+
+    ret = Emplace(composition, planes, DrmCompositionPlane::Type::kLayer, crtc,
+                  std::make_pair(i->first, i->second));
+    if (ret) {
+      ALOGE("Failed to dedicate protected layer! Dropping it.");
+      return ret;
+    }
+
+    protected_zorder = i->first;
+    i = layers.erase(i);
+  }
+
+  return 0;
+}
+
+int PlanStageGreedy::ProvisionPlanes(
+    std::vector<DrmCompositionPlane> *composition,
+    std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
+    std::vector<DrmPlane *> *planes) {
+  // Fill up the remaining planes
+  for (auto i = layers.begin(); i != layers.end(); i = layers.erase(i)) {
+    int ret = Emplace(composition, planes, DrmCompositionPlane::Type::kLayer,
+                      crtc, std::make_pair(i->first, i->second));
+    // We don't have any planes left
+    if (ret == -ENOENT)
+      break;
+    else if (ret) {
+      ALOGE("Failed to emplace layer %zu, dropping it", i->first);
+      return ret;
+    }
+  }
+
+  return 0;
+}
+}  // namespace android