c0719cedac
No functional change. This makes the code more generic and this reduces the size of screen_capturer_mac.mm Bug: webrtc:8652 Change-Id: I37743ba385fea5e1b40df3b094bfc321b8d796ae Reviewed-on: https://webrtc-review.googlesource.com/65082 Commit-Queue: Julien Isorce <julien.isorce@chromium.org> Commit-Queue: Zijie He <zijiehe@chromium.org> Reviewed-by: Zijie He <zijiehe@chromium.org> Cr-Commit-Position: refs/heads/master@{#22684}
68 lines
2.5 KiB
Plaintext
68 lines
2.5 KiB
Plaintext
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/desktop_capture/mac/desktop_frame_cgimage.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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// static
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std::unique_ptr<DesktopFrameCGImage> DesktopFrameCGImage::CreateForDisplay(
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CGDirectDisplayID display_id) {
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// Create an image containing a snapshot of the display.
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rtc::ScopedCFTypeRef<CGImageRef> cg_image(CGDisplayCreateImage(display_id));
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if (!cg_image) {
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return nullptr;
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}
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// Verify that the image has 32-bit depth.
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int bits_per_pixel = CGImageGetBitsPerPixel(cg_image.get());
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if (bits_per_pixel / 8 != DesktopFrame::kBytesPerPixel) {
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RTC_LOG(LS_ERROR) << "CGDisplayCreateImage() returned imaged with " << bits_per_pixel
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<< " bits per pixel. Only 32-bit depth is supported.";
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return nullptr;
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}
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// Request access to the raw pixel data via the image's DataProvider.
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CGDataProviderRef cg_provider = CGImageGetDataProvider(cg_image.get());
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RTC_DCHECK(cg_provider);
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// CGDataProviderCopyData returns a new data object containing a copy of the provider’s
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// data.
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rtc::ScopedCFTypeRef<CFDataRef> cg_data(CGDataProviderCopyData(cg_provider));
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RTC_DCHECK(cg_data);
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// CFDataGetBytePtr returns a read-only pointer to the bytes of a CFData object.
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uint8_t* data = const_cast<uint8_t*>(CFDataGetBytePtr(cg_data.get()));
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RTC_DCHECK(data);
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DesktopSize size(CGImageGetWidth(cg_image.get()), CGImageGetHeight(cg_image.get()));
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int stride = CGImageGetBytesPerRow(cg_image.get());
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return std::unique_ptr<DesktopFrameCGImage>(
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new DesktopFrameCGImage(size, stride, data, cg_image, cg_data));
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}
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DesktopFrameCGImage::DesktopFrameCGImage(DesktopSize size,
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int stride,
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uint8_t* data,
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rtc::ScopedCFTypeRef<CGImageRef> cg_image,
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rtc::ScopedCFTypeRef<CFDataRef> cg_data)
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: DesktopFrame(size, stride, data, nullptr), cg_image_(cg_image), cg_data_(cg_data) {
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RTC_DCHECK(cg_image_);
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RTC_DCHECK(cg_data_);
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}
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DesktopFrameCGImage::~DesktopFrameCGImage() = default;
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} // namespace webrtc
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