| /* |
| * 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. |
| */ |
| |
| #ifndef GAPIR_RESOURCE_PROVIDER_H |
| #define GAPIR_RESOURCE_PROVIDER_H |
| |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include <stdint.h> |
| |
| namespace gapir { |
| |
| class ServerConnection; |
| typedef std::string ResourceId; |
| |
| class ResourceProvider { |
| public: |
| typedef std::vector<std::pair<ResourceId, uint32_t>> ResourceList; |
| |
| // List of possible arguments can be set on the different resource providers |
| enum class Argument { |
| IN_MEMORY_CACHE_SIZE, |
| }; |
| |
| virtual ~ResourceProvider() {} |
| |
| // Loads resources from one of the available resource providers with the given <resourceId>. |
| // Resources are written to the memory location given by <target> and at most <size> bytes |
| // are written. Returns true if the resource was successfully loaded and all <size> bytes were |
| // written, otherwise false. |
| virtual bool get(const ResourceId& id, const ServerConnection& gazer, |
| void* target, uint32_t size) = 0; |
| virtual bool get(const ResourceList& resources, const ServerConnection& gazer, |
| void* target, uint32_t size); |
| |
| // Same as get but prevents resource caching, i.e. forward to fallback on caching providers. |
| virtual bool getUncached(const ResourceId& id, const ServerConnection& gazer, |
| void* target, uint32_t size) = 0; |
| |
| // Prefetches the resources for resource providers where prefetching is available. |
| // The resources vector have to contain (resource id, resource size) pairs and buffer should |
| // point to a buffer at least as big as the largest resource. The buffer will be used for |
| // temporary objects only with no guarantee about its final content. Returns true if prefetching |
| // was successful, otherwise false. |
| virtual bool prefetch(const ResourceList& resources, |
| const ServerConnection& gazer, void* buffer, uint32_t size) = 0; |
| }; |
| |
| } // namespace gapir |
| |
| #endif // GAPIR_RESOURCE_PROVIDER_H |