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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "pdf/pdf_ink_cursor.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
namespace chrome_pdf {
namespace {
TEST(PdfInkCursorTest, CursorDiameterFromBrushSizeAndZoom) {
// Very small brush sizes result in a minimum cursor size.
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/1.0f,
/*zoom=*/1.0f));
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/2.0f,
/*zoom=*/1.0f));
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/4.0f,
/*zoom=*/1.0f));
// Small brush sizes have a small offset value.
EXPECT_EQ(7, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/5.0f,
/*zoom=*/1.0f));
EXPECT_EQ(8, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/6.0f,
/*zoom=*/1.0f));
EXPECT_EQ(11, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/9.0f,
/*zoom=*/1.0f));
// Larger brush sizes have a larger offset value.
EXPECT_EQ(14, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/10.0f,
/*zoom=*/1.0f));
EXPECT_EQ(15, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/11.0f,
/*zoom=*/1.0f));
EXPECT_EQ(20, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/16.0f,
/*zoom=*/1.0f));
// Very small brush sizes with zoom end up close to the minimum cursor size.
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/1.0f,
/*zoom=*/0.25f));
EXPECT_EQ(7, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/1.0f,
/*zoom=*/5.0f));
// Small brush sizes scale with zoom, but can get clipped at min/max cursor
// sizes.
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/5.0f,
/*zoom=*/0.5f));
EXPECT_EQ(19, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/5.0f,
/*zoom=*/3.0f));
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/9.0f,
/*zoom=*/0.33f));
EXPECT_EQ(32, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/9.0f,
/*zoom=*/4.0f));
// Larger brush sizes scale with zoom, but often get clipped at max cursor
// size.
EXPECT_EQ(6, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/10.0f,
/*zoom=*/0.25f));
EXPECT_EQ(24, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/10.0f,
/*zoom=*/2.0f));
EXPECT_EQ(32, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/10.0f,
/*zoom=*/3.0f));
EXPECT_EQ(32, CursorDiameterFromBrushSizeAndZoom(/*brush_size=*/16.0f,
/*zoom=*/5.0f));
}
TEST(PdfInkCursorTest, GenerateToolCursor) {
// For each cursor bitmap, test:
// 1) The top-left corner, which is the outline color for small bitmaps, and
// transparent for larger bitmaps.
// 2) The middle, which is the solid cursor color.
// 3) The right edge, which is the outline color. Note that lighter cursor
// colors have a darker outline color, and vice versa.
{
SkBitmap bitmap = GenerateToolCursor(SK_ColorBLACK, 6);
ASSERT_EQ(6, bitmap.width());
ASSERT_EQ(6, bitmap.height());
ASSERT_FALSE(bitmap.drawsNothing());
EXPECT_EQ(SkColorSetARGB(0x18, 0xAA, 0xAA, 0xAA), bitmap.getColor(0, 0));
EXPECT_EQ(SK_ColorBLACK, bitmap.getColor(3, 3));
EXPECT_EQ(SkColorSetARGB(0x18, 0xAA, 0xAA, 0xAA), bitmap.getColor(5, 0));
}
{
SkBitmap bitmap = GenerateToolCursor(SK_ColorRED, 8);
ASSERT_EQ(8, bitmap.width());
ASSERT_EQ(8, bitmap.height());
ASSERT_FALSE(bitmap.drawsNothing());
EXPECT_EQ(SK_ColorTRANSPARENT, bitmap.getColor(0, 0));
EXPECT_EQ(SK_ColorRED, bitmap.getColor(4, 4));
EXPECT_EQ(SkColorSetARGB(0xF0, 0xAA, 0xAA, 0xAA), bitmap.getColor(7, 4));
}
{
SkBitmap bitmap = GenerateToolCursor(SK_ColorWHITE, 20);
ASSERT_EQ(20, bitmap.width());
ASSERT_EQ(20, bitmap.height());
ASSERT_FALSE(bitmap.drawsNothing());
EXPECT_EQ(SK_ColorTRANSPARENT, bitmap.getColor(0, 0));
EXPECT_EQ(SK_ColorWHITE, bitmap.getColor(10, 10));
EXPECT_EQ(SkColorSetARGB(0xE8, 0x90, 0x90, 0x90), bitmap.getColor(19, 10));
}
}
} // namespace
} // namespace chrome_pdf
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