| // Copyright 2016 Google Inc. 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/blitter/graphics_context.h" |
| |
| #include <algorithm> |
| |
| #include "base/debug/trace_event.h" |
| #include "cobalt/base/polymorphic_downcast.h" |
| #include "cobalt/renderer/backend/blitter/graphics_system.h" |
| #include "cobalt/renderer/backend/blitter/surface_render_target.h" |
| #include "starboard/blitter.h" |
| |
| #if SB_HAS(BLITTER) |
| |
| namespace cobalt { |
| namespace renderer { |
| namespace backend { |
| |
| GraphicsContextBlitter::GraphicsContextBlitter(GraphicsSystem* system) |
| : GraphicsContext(system) { |
| TRACE_EVENT0("cobalt::renderer", |
| "GraphicsContextBlitter::GraphicsContextBlitter"); |
| |
| device_ = base::polymorphic_downcast<GraphicsSystemBlitter*>(system) |
| ->GetSbBlitterDevice(); |
| context_ = SbBlitterCreateContext(device_); |
| CHECK(SbBlitterIsContextValid(context_)); |
| } |
| |
| GraphicsContextBlitter::~GraphicsContextBlitter() { |
| TRACE_EVENT0("cobalt::renderer", |
| "GraphicsContextBlitter::~GraphicsContextBlitter"); |
| SbBlitterDestroyContext(context_); |
| } |
| |
| scoped_refptr<RenderTarget> GraphicsContextBlitter::CreateOffscreenRenderTarget( |
| const math::Size& dimensions) { |
| TRACE_EVENT0("cobalt::renderer", |
| "GraphicsContextBlitter::CreateOffscreenRenderTarget"); |
| |
| scoped_refptr<RenderTarget> render_target( |
| new SurfaceRenderTargetBlitter(device_, dimensions)); |
| if (render_target->CreationError()) { |
| return scoped_refptr<RenderTarget>(); |
| } else { |
| return render_target; |
| } |
| } |
| |
| scoped_array<uint8_t> GraphicsContextBlitter::DownloadPixelDataAsRGBA( |
| const scoped_refptr<RenderTarget>& render_target) { |
| TRACE_EVENT0("cobalt::renderer", |
| "GraphicsContextBlitter::DownloadPixelDataAsRGBA"); |
| SurfaceRenderTargetBlitter* render_target_blitter = |
| base::polymorphic_downcast<SurfaceRenderTargetBlitter*>( |
| render_target.get()); |
| |
| SbBlitterSurface surface = render_target_blitter->GetSbSurface(); |
| |
| const math::Size& size = render_target_blitter->GetSize(); |
| scoped_array<uint8_t> pixels(new uint8_t[size.GetArea() * 4]); |
| |
| SbBlitterFlushContext(context_); |
| SbBlitterDownloadSurfacePixels(surface, kSbBlitterPixelDataFormatRGBA8, |
| size.width() * 4, pixels.get()); |
| |
| return pixels.Pass(); |
| } |
| |
| void GraphicsContextBlitter::Finish() { |
| // Note: flushing the context doesn't actually guarantee that drawing has |
| // finished. |
| SbBlitterFlushContext(context_); |
| } |
| |
| } // namespace backend |
| } // namespace renderer |
| } // namespace cobalt |
| |
| #endif // #if SB_HAS(BLITTER) |