blob: 399a9a46c529c6e9838cb0577b0a05e8a6b22b51 [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "flutter/shell/gpu/gpu_surface_software.h"
#include <memory>
#include "flutter/fml/logging.h"
namespace flutter {
flutter::ExternalViewEmbedder*
GPUSurfaceSoftwareDelegate::GetExternalViewEmbedder() {
return nullptr;
}
GPUSurfaceSoftware::GPUSurfaceSoftware(GPUSurfaceSoftwareDelegate* delegate)
: delegate_(delegate), weak_factory_(this) {}
GPUSurfaceSoftware::~GPUSurfaceSoftware() = default;
// |Surface|
bool GPUSurfaceSoftware::IsValid() {
return delegate_ != nullptr;
}
// |Surface|
std::unique_ptr<SurfaceFrame> GPUSurfaceSoftware::AcquireFrame(
const SkISize& logical_size) {
if (!IsValid()) {
return nullptr;
}
const auto size = SkISize::Make(logical_size.width(), logical_size.height());
sk_sp<SkSurface> backing_store = delegate_->AcquireBackingStore(size);
if (backing_store == nullptr) {
return nullptr;
}
if (size != SkISize::Make(backing_store->width(), backing_store->height())) {
return nullptr;
}
// If the surface has been scaled, we need to apply the inverse scaling to the
// underlying canvas so that coordinates are mapped to the same spot
// irrespective of surface scaling.
SkCanvas* canvas = backing_store->getCanvas();
canvas->resetMatrix();
SurfaceFrame::SubmitCallback on_submit =
[self = weak_factory_.GetWeakPtr()](const SurfaceFrame& surface_frame,
SkCanvas* canvas) -> bool {
// If the surface itself went away, there is nothing more to do.
if (!self || !self->IsValid() || canvas == nullptr) {
return false;
}
canvas->flush();
return self->delegate_->PresentBackingStore(surface_frame.SkiaSurface());
};
return std::make_unique<SurfaceFrame>(backing_store, on_submit);
}
// |Surface|
SkMatrix GPUSurfaceSoftware::GetRootTransformation() const {
// This backend does not currently support root surface transformations. Just
// return identity.
SkMatrix matrix;
matrix.reset();
return matrix;
}
// |Surface|
GrContext* GPUSurfaceSoftware::GetContext() {
// There is no GrContext associated with a software surface.
return nullptr;
}
// |Surface|
flutter::ExternalViewEmbedder* GPUSurfaceSoftware::GetExternalViewEmbedder() {
return delegate_->GetExternalViewEmbedder();
}
} // namespace flutter