| // Copyright 2017 The Cobalt Authors. All Rights Reserved. |
| // |
| // 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 "cobalt/renderer/backend/graphics_context.h" |
| |
| #include "base/logging.h" |
| #include "starboard/string.h" |
| |
| namespace cobalt { |
| namespace renderer { |
| namespace backend { |
| |
| GraphicsContext::GraphicsContext(GraphicsSystem* system) |
| : system_(system) { |
| #if SB_API_VERSION < 11 |
| graphics_extension_ = nullptr; |
| #else |
| graphics_extension_ = static_cast<const CobaltExtensionGraphicsApi*>( |
| SbSystemGetExtension(kCobaltExtensionGraphicsName)); |
| if (graphics_extension_) { |
| // Verify it's the extension needed. |
| if (SbStringCompareAll(graphics_extension_->name, |
| kCobaltExtensionGraphicsName) != 0 || |
| graphics_extension_->version < 1) { |
| LOG(WARNING) << "Not using supplied cobalt graphics extension: " |
| << "'" << graphics_extension_->name << "' (" |
| << graphics_extension_->version << ")"; |
| graphics_extension_ = nullptr; |
| } |
| } |
| #endif |
| } |
| |
| float GraphicsContext::GetMaximumFrameIntervalInMilliseconds() { |
| if (graphics_extension_) { |
| return graphics_extension_->GetMaximumFrameIntervalInMilliseconds(); |
| } |
| |
| // Allow the rasterizer to delay rendering indefinitely if nothing has |
| // changed. |
| return -1.0f; |
| } |
| |
| } // namespace backend |
| } // namespace renderer |
| } // namespace cobalt |