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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_MEDIA_CAPTURE_FRAME_TEST_UTIL_H_
#define CONTENT_BROWSER_MEDIA_CAPTURE_FRAME_TEST_UTIL_H_
#include <ostream>
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
namespace gfx {
class Rect;
class RectF;
} // namespace gfx
namespace media {
class VideoFrame;
} // namespace media
namespace content {
class FrameTestUtil {
public:
struct RGB {
double r;
double g;
double b;
};
// Converts the image data in the given |frame| to a new SkBitmap. The result
// uses the sRGB color space.
static SkBitmap ConvertToBitmap(const media::VideoFrame& frame);
// Helper functions to adjust the rects to account for the "fuzzy border"
// between regions. These are typically used to generate the |include_rect|
// and |exclude_rect| arguments passed to ComputeAverageColor() below. This
// improves test accuracy, since the capturer's scaling can cause blended
// colors at the border between regions. ToSafeIncludeRect() is used to
// crop-out the outer fuzzy pixels of a region, while ToSafeExcludeRect()
// is used to include an extra border of possible fuzziness around a region
// that should be omitted.
static gfx::Rect ToSafeIncludeRect(const gfx::RectF& rect_f,
int fuzzy_border = 4);
static gfx::Rect ToSafeExcludeRect(const gfx::RectF& rect_f,
int fuzzy_border = 4);
// Returns the average RGB color in |include_rect| except for pixels also in
// |exclude_rect|.
static RGB ComputeAverageColor(SkBitmap frame,
const gfx::Rect& include_rect,
const gfx::Rect& exclude_rect);
// Returns true if the red, green, and blue components of |color| and |rgb|
// are all within |max_diff| of each other.
static bool IsApproximatelySameColor(SkColor color,
const RGB& rgb,
int max_diff = kMaxColorDifference);
// Returns true if the red, green, and blue components of |color| and
// |expected_color| are all within |max_diff| of each other.
static bool IsApproximatelySameColor(SkColor color,
SkColor expected_color,
int max_diff = kMaxColorDifference);
// Returns true if the red, green, and blue components of pixels in
// |frame| are within |max_diff| of |expected_color|. Only the pixels
// contained within |raw_include_rect| and not contained within
// |raw_exclude_rect| will be considered.
static bool IsApproximatelySameColor(SkBitmap frame,
const gfx::Rect& raw_include_rect,
const gfx::Rect& raw_exclude_rect,
SkColor expected_color,
int max_diff = kMaxColorDifference);
// Determines how |original| has been scaled and translated to become
// |transformed|, and then applies the same transform on |rect| and returns
// the result.
static gfx::RectF TransformSimilarly(const gfx::Rect& original,
const gfx::RectF& transformed,
const gfx::Rect& rect);
// The default maximum color value difference.
static constexpr int kMaxColorDifference = 4;
// Only use this for platform/use-case combinations where a trade-off has been
// made explicitly for performance reasons.
static constexpr int kVeryLooseMaxColorDifference = 64;
};
// A convenience for logging and gtest expectations output.
std::ostream& operator<<(std::ostream& out, const FrameTestUtil::RGB& rgb);
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CAPTURE_FRAME_TEST_UTIL_H_
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