drm_hwcomposer: Wrap libdrm ops (minus modeset/flip) in C++ classes

This allows us to compartmentalize a bunch of code/logic from
hwcomposer.cpp into drm classes.

Signed-off-by: Sean Paul <seanpaul@chromium.org>

Change-Id: Id3f912126f1fdcd44d32c3eb4fba646f77590278

1 files changed, 95 insertions, 0 deletions

diff --git a/drmproperty.cpp b/drmproperty.cpp
new file mode 100644
index 0000000..0acea17
--- /dev/null
+++ b/drmproperty.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+#include "drmproperty.h"
+#include "drmresources.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <string>
+
+#include <xf86drmMode.h>
+
+namespace android {
+
+DrmProperty::DrmPropertyEnum::DrmPropertyEnum(drm_mode_property_enum *e)
+    : value_(e->value), name_(e->name) {
+}
+
+DrmProperty::DrmPropertyEnum::~DrmPropertyEnum() {
+}
+
+DrmProperty::DrmProperty(drmModePropertyPtr p, uint64_t value)
+    : id_(0), flags_(0), name_("") {
+  Init(p, value);
+}
+
+DrmProperty::DrmProperty() : id_(0), flags_(0), name_(""), value_(0) {
+}
+
+DrmProperty::~DrmProperty() {
+}
+
+void DrmProperty::Init(drmModePropertyPtr p, uint64_t value) {
+  id_ = p->prop_id;
+  flags_ = p->flags;
+  name_ = p->name;
+  value_ = value;
+
+  for (int i = 0; i < p->count_values; ++i)
+    values_.push_back(p->values[i]);
+
+  for (int i = 0; i < p->count_enums; ++i)
+    enums_.push_back(DrmPropertyEnum(&p->enums[i]));
+
+  for (int i = 0; i < p->count_blobs; ++i)
+    blob_ids_.push_back(p->blob_ids[i]);
+
+  if (flags_ & DRM_MODE_PROP_RANGE)
+    type_ = DRM_PROPERTY_TYPE_INT;
+  else if (flags_ & DRM_MODE_PROP_ENUM)
+    type_ = DRM_PROPERTY_TYPE_ENUM;
+}
+
+uint32_t DrmProperty::id() const {
+  return id_;
+}
+
+std::string DrmProperty::name() const {
+  return name_;
+}
+
+int DrmProperty::value(uint64_t *value) const {
+  if (values_.size() == 0)
+    return -ENOENT;
+
+  switch (type_) {
+    case DRM_PROPERTY_TYPE_INT:
+      *value = value_;
+      return 0;
+
+    case DRM_PROPERTY_TYPE_ENUM:
+      if (value_ >= enums_.size())
+        return -ENOENT;
+
+      *value = enums_[value_].value_;
+      return 0;
+
+    default:
+      return -EINVAL;
+  }
+}
+}