electron/shell/browser/osr/osr_host_display_client_mac.mm

// Copyright (c) 2019 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "shell/browser/osr/osr_host_display_client.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkImageInfo.h"

#include <IOSurface/IOSurface.h>

namespace electron {

void OffScreenHostDisplayClient::OnDisplayReceivedCALayerParams(
    const gfx::CALayerParams& ca_layer_params) {
  if (!ca_layer_params.is_empty) {
    base::apple::ScopedCFTypeRef<IOSurfaceRef> io_surface(
        IOSurfaceLookupFromMachPort(
            ca_layer_params.io_surface_mach_port.get()));

    gfx::Size pixel_size_ = ca_layer_params.pixel_size;
    void* pixels =
        static_cast<void*>(IOSurfaceGetBaseAddress(io_surface.get()));
    size_t stride = IOSurfaceGetBytesPerRow(io_surface.get());

    struct IOSurfacePinner {
      base::apple::ScopedCFTypeRef<IOSurfaceRef> io_surface;
    };

    SkBitmap bitmap;
    bitmap.installPixels(
        SkImageInfo::MakeN32(pixel_size_.width(), pixel_size_.height(),
                             kPremul_SkAlphaType),
        pixels, stride);
    bitmap.setImmutable();
    callback_.Run(ca_layer_params.damage, bitmap, {});
  }
}

}  // namespace electron