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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chrome/browser/thumbnails/content_analysis.h" | 5 #include "chrome/browser/thumbnails/content_analysis.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 #include <cmath> | 8 #include <cmath> |
| 9 #include <cstdlib> | 9 #include <cstdlib> |
| 10 #include <functional> | 10 #include <functional> |
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| 25 | 25 |
| 26 namespace { | 26 namespace { |
| 27 | 27 |
| 28 #ifndef M_PI | 28 #ifndef M_PI |
| 29 #define M_PI 3.14159265358979323846 | 29 #define M_PI 3.14159265358979323846 |
| 30 #endif | 30 #endif |
| 31 | 31 |
| 32 unsigned long ImagePixelSum(const SkBitmap& bitmap, const gfx::Rect& rect) { | 32 unsigned long ImagePixelSum(const SkBitmap& bitmap, const gfx::Rect& rect) { |
| 33 // Get the sum of pixel values in the rectangle. Applicable only to | 33 // Get the sum of pixel values in the rectangle. Applicable only to |
| 34 // monochrome bitmaps. | 34 // monochrome bitmaps. |
| 35 DCHECK_EQ(SkBitmap::kA8_Config, bitmap.config()); | 35 DCHECK_EQ(kAlpha_8_SkColorType, bitmap.colorType()); |
| 36 unsigned long total = 0; | 36 unsigned long total = 0; |
| 37 for (int r = rect.y(); r < rect.bottom(); ++r) { | 37 for (int r = rect.y(); r < rect.bottom(); ++r) { |
| 38 const uint8* row_data = static_cast<const uint8*>( | 38 const uint8* row_data = static_cast<const uint8*>( |
| 39 bitmap.getPixels()) + r * bitmap.rowBytes(); | 39 bitmap.getPixels()) + r * bitmap.rowBytes(); |
| 40 for (int c = rect.x(); c < rect.right(); ++c) | 40 for (int c = rect.x(); c < rect.right(); ++c) |
| 41 total += row_data[c]; | 41 total += row_data[c]; |
| 42 } | 42 } |
| 43 | 43 |
| 44 return total; | 44 return total; |
| 45 } | 45 } |
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| 701 | 701 |
| 702 int histogram[256] = {}; | 702 int histogram[256] = {}; |
| 703 color_utils::BuildLumaHistogram(result, histogram); | 703 color_utils::BuildLumaHistogram(result, histogram); |
| 704 int non_zero_color_count = std::count_if( | 704 int non_zero_color_count = std::count_if( |
| 705 histogram, histogram + 256, std::bind2nd(std::greater<int>(), 0)); | 705 histogram, histogram + 256, std::bind2nd(std::greater<int>(), 0)); |
| 706 EXPECT_GT(non_zero_color_count, 4); | 706 EXPECT_GT(non_zero_color_count, 4); |
| 707 | 707 |
| 708 } | 708 } |
| 709 | 709 |
| 710 } // namespace thumbnailing_utils | 710 } // namespace thumbnailing_utils |
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