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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "services/shape_detection/text_detection_impl_mac.h" |
| 6 |
| 7 #include "base/mac/mac_util.h" |
| 8 #include "base/mac/scoped_cftyperef.h" |
| 9 #include "base/mac/sdk_forward_declarations.h" |
| 10 #include "base/strings/sys_string_conversions.h" |
| 11 #include "media/capture/video/scoped_result_callback.h" |
| 12 #include "mojo/public/cpp/bindings/strong_binding.h" |
| 13 #include "services/shape_detection/detection_utils_mac.h" |
| 14 #include "services/shape_detection/text_detection_impl.h" |
| 15 |
| 16 namespace shape_detection { |
| 17 |
| 18 namespace { |
| 19 |
| 20 void RunCallbackWithResults( |
| 21 const mojom::TextDetection::DetectCallback& callback, |
| 22 std::vector<mojom::TextDetectionResultPtr> results) { |
| 23 callback.Run(std::move(results)); |
| 24 } |
| 25 |
| 26 void RunCallbackWithNoResults( |
| 27 const mojom::TextDetection::DetectCallback& callback) { |
| 28 callback.Run(std::vector<mojom::TextDetectionResultPtr>()); |
| 29 } |
| 30 |
| 31 } // anonymous namespace |
| 32 |
| 33 // static |
| 34 void TextDetectionImpl::Create(mojom::TextDetectionRequest request) { |
| 35 // Text detection needs at least MAC OS X 10.11. |
| 36 if (!base::mac::IsAtLeastOS10_11()) |
| 37 return; |
| 38 mojo::MakeStrongBinding(base::MakeUnique<TextDetectionImplMac>(), |
| 39 std::move(request)); |
| 40 } |
| 41 |
| 42 TextDetectionImplMac::TextDetectionImplMac() { |
| 43 NSDictionary* const opts = @{CIDetectorAccuracy : CIDetectorAccuracyHigh}; |
| 44 detector_.reset([[CIDetector detectorOfType:CIDetectorTypeText |
| 45 context:nil |
| 46 options:opts] retain]); |
| 47 } |
| 48 |
| 49 TextDetectionImplMac::~TextDetectionImplMac() {} |
| 50 |
| 51 void TextDetectionImplMac::Detect(mojo::ScopedSharedBufferHandle frame_data, |
| 52 uint32_t width, |
| 53 uint32_t height, |
| 54 const DetectCallback& callback) { |
| 55 DCHECK(base::mac::IsAtLeastOS10_11()); |
| 56 media::ScopedResultCallback<DetectCallback> scoped_callback( |
| 57 base::Bind(&RunCallbackWithResults, callback), |
| 58 base::Bind(&RunCallbackWithNoResults)); |
| 59 |
| 60 base::scoped_nsobject<CIImage> ci_image = |
| 61 CreateCIImageFromSharedMemory(std::move(frame_data), width, height); |
| 62 if (!ci_image) |
| 63 return; |
| 64 |
| 65 NSArray* const features = [detector_ featuresInImage:ci_image]; |
| 66 |
| 67 std::vector<mojom::TextDetectionResultPtr> results; |
| 68 for (CIRectangleFeature* const f in features) { |
| 69 // CIRectangleFeature only has bounding box information. |
| 70 auto result = mojom::TextDetectionResult::New(); |
| 71 // In the default Core Graphics coordinate space, the origin is located |
| 72 // in the lower-left corner, and thus |ci_image| is flipped vertically. |
| 73 // We need to adjust |y| coordinate of bounding box before sending it. |
| 74 gfx::RectF boundingbox(f.bounds.origin.x, |
| 75 height - f.bounds.origin.y - f.bounds.size.height, |
| 76 f.bounds.size.width, f.bounds.size.height); |
| 77 result->bounding_box = std::move(boundingbox); |
| 78 results.push_back(std::move(result)); |
| 79 } |
| 80 scoped_callback.Run(std::move(results)); |
| 81 } |
| 82 |
| 83 } // namespace shape_detection |
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