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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "chrome/browser/media/webrtc/desktop_media_picker_utils.h"
#include "base/notreached.h"
#include "chrome/browser/media/webrtc/desktop_media_list.h"
#include "media/base/video_util.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/image/image_skia_operations.h"
gfx::ImageSkia ScaleBitmap(const SkBitmap& bitmap, gfx::Size size) {
const gfx::Rect scaled_rect = media::ComputeLetterboxRegion(
gfx::Rect(0, 0, size.width(), size.height()),
gfx::Size(bitmap.info().width(), bitmap.info().height()));
// TODO(crbug.com/40789487): Consider changing to ResizeMethod::BEST after
// verifying CPU impact isn't too high.
const gfx::ImageSkia resized = gfx::ImageSkiaOperations::CreateResizedImage(
gfx::ImageSkia::CreateFromBitmap(bitmap, 1.f),
skia::ImageOperations::ResizeMethod::RESIZE_GOOD, scaled_rect.size());
SkBitmap result(*resized.bitmap());
// Set alpha channel values to 255 for all pixels.
// TODO(crbug.com/41029106): Fix screen/window capturers to capture alpha
// channel and remove this code. Currently screen/window capturers (at least
// some implementations) only capture R, G and B channels and set Alpha to 0.
uint8_t* pixels_data = reinterpret_cast<uint8_t*>(result.getPixels());
for (int y = 0; y < result.height(); ++y) {
for (int x = 0; x < result.width(); ++x) {
pixels_data[result.rowBytes() * y + x * result.bytesPerPixel() + 3] =
0xff;
}
}
return gfx::ImageSkia::CreateFrom1xBitmap(result);
}
content::DesktopMediaID::Type AsDesktopMediaIdType(
DesktopMediaList::Type type) {
switch (type) {
case DesktopMediaList::Type::kScreen:
return content::DesktopMediaID::Type::TYPE_SCREEN;
case DesktopMediaList::Type::kWindow:
return content::DesktopMediaID::Type::TYPE_WINDOW;
case DesktopMediaList::Type::kWebContents:
case DesktopMediaList::Type::kCurrentTab:
return content::DesktopMediaID::Type::TYPE_WEB_CONTENTS;
case DesktopMediaList::Type::kNone:
return content::DesktopMediaID::Type::TYPE_NONE;
}
NOTREACHED();
}
DesktopMediaList::Type AsDesktopMediaListType(
content::DesktopMediaID::Type type) {
switch (type) {
case content::DesktopMediaID::Type::TYPE_SCREEN:
return DesktopMediaList::Type::kScreen;
case content::DesktopMediaID::Type::TYPE_WINDOW:
return DesktopMediaList::Type::kWindow;
case content::DesktopMediaID::Type::TYPE_WEB_CONTENTS:
return DesktopMediaList::Type::kWebContents;
case content::DesktopMediaID::Type::TYPE_NONE:
return DesktopMediaList::Type::kNone;
}
NOTREACHED();
}
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