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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/enterprise/watermarking/watermark_test_utils.h"
#include <utility>
#include "base/memory/shared_memory_mapping.h"
#include "components/enterprise/watermarking/mojom/watermark.mojom.h"
#include "components/enterprise/watermarking/watermark.h"
#include "skia/ext/font_utils.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkPictureRecorder.h"
#include "third_party/skia/include/core/SkSerialProcs.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/include/core/SkTextBlob.h"
namespace enterprise_watermark {
watermark::mojom::WatermarkBlockPtr MakeTestWatermarkBlock(
const std::string& watermark_text,
const SkSize watermark_size) {
// Initialize text blob
static constexpr SkScalar kTextSize = 30.0f;
SkFont font(skia::DefaultTypeface(), kTextSize, 1.0f, 0.0f);
sk_sp<SkTextBlob> blob =
SkTextBlob::MakeFromString(watermark_text.c_str(), font);
// Draw onto SkPicture-backed SkCanvas
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(
SkRect{SkRect::MakeWH(watermark_size.fWidth, watermark_size.fHeight)});
SkPaint paint;
paint.setColor(SK_ColorWHITE);
canvas->drawTextBlob(blob.get(), 0.0f, 0.0f, paint);
sk_sp<SkPicture> picture = recorder.finishRecordingAsPicture();
// Serialize SkPicture
SkDynamicMemoryWStream stream;
SkSerialProcs procs;
picture->serialize(&stream, &procs);
base::MappedReadOnlyRegion region_mapping =
base::ReadOnlySharedMemoryRegion::Create(stream.bytesWritten());
if (!region_mapping.IsValid()) {
return nullptr;
}
stream.copyTo(region_mapping.mapping.memory());
// Measure string dimensions
SkScalar text_width = font.measureText(
watermark_text.c_str(), watermark_text.size(), SkTextEncoding::kUTF8);
// Construct test data
return watermark::mojom::WatermarkBlockPtr(
std::in_place, std::move(region_mapping.region), text_width, kTextSize);
}
} // namespace enterprise_watermark
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