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| 1 // Copyright 2014 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 "ui/snapshot/snapshot_async.h" |
| 6 |
| 7 #include "base/location.h" |
| 8 #include "base/memory/ref_counted.h" |
| 9 #include "base/numerics/safe_conversions.h" |
| 10 #include "base/task_runner_util.h" |
| 11 #include "skia/ext/image_operations.h" |
| 12 #include "third_party/skia/include/core/SkBitmap.h" |
| 13 #include "third_party/skia/include/core/SkPixelRef.h" |
| 14 #include "ui/gfx/codec/png_codec.h" |
| 15 #include "ui/gfx/image/image.h" |
| 16 #include "ui/gfx/image/image_skia.h" |
| 17 #include "ui/gfx/skbitmap_operations.h" |
| 18 |
| 19 namespace ui { |
| 20 |
| 21 namespace { |
| 22 |
| 23 void OnFrameScalingFinished(const GrabWindowSnapshotAsyncCallback& callback, |
| 24 const SkBitmap& scaled_bitmap) { |
| 25 callback.Run(gfx::Image(gfx::ImageSkia::CreateFrom1xBitmap(scaled_bitmap))); |
| 26 } |
| 27 |
| 28 SkBitmap ScaleBitmap(const SkBitmap& input_bitmap, |
| 29 const gfx::Size& target_size) { |
| 30 return skia::ImageOperations::Resize(input_bitmap, |
| 31 skia::ImageOperations::RESIZE_GOOD, |
| 32 target_size.width(), |
| 33 target_size.height(), |
| 34 static_cast<SkBitmap::Allocator*>(NULL)); |
| 35 } |
| 36 |
| 37 scoped_refptr<base::RefCountedBytes> EncodeBitmap(const SkBitmap& bitmap) { |
| 38 scoped_refptr<base::RefCountedBytes> png_data(new base::RefCountedBytes); |
| 39 SkAutoLockPixels lock(bitmap); |
| 40 unsigned char* pixels = reinterpret_cast<unsigned char*>(bitmap.getPixels()); |
| 41 #if SK_A32_SHIFT == 24 && SK_R32_SHIFT == 16 && SK_G32_SHIFT == 8 |
| 42 gfx::PNGCodec::ColorFormat kColorFormat = gfx::PNGCodec::FORMAT_BGRA; |
| 43 #elif SK_A32_SHIFT == 24 && SK_B32_SHIFT == 16 && SK_G32_SHIFT == 8 |
| 44 gfx::PNGCodec::ColorFormat kColorFormat = gfx::PNGCodec::FORMAT_RGBA; |
| 45 #else |
| 46 #error Unknown color format |
| 47 #endif |
| 48 if (!gfx::PNGCodec::Encode(pixels, |
| 49 kColorFormat, |
| 50 gfx::Size(bitmap.width(), bitmap.height()), |
| 51 base::checked_cast<int>(bitmap.rowBytes()), |
| 52 true, |
| 53 std::vector<gfx::PNGCodec::Comment>(), |
| 54 &png_data->data())) { |
| 55 return scoped_refptr<base::RefCountedBytes>(); |
| 56 } |
| 57 return png_data; |
| 58 } |
| 59 |
| 60 } // namespace |
| 61 |
| 62 void SnapshotAsync::ScaleCopyOutputResult( |
| 63 const GrabWindowSnapshotAsyncCallback& callback, |
| 64 const gfx::Size& target_size, |
| 65 scoped_refptr<base::TaskRunner> background_task_runner, |
| 66 scoped_ptr<cc::CopyOutputResult> result) { |
| 67 if (result->IsEmpty()) { |
| 68 callback.Run(gfx::Image()); |
| 69 return; |
| 70 } |
| 71 |
| 72 // TODO(sergeyu): Potentially images can be scaled on GPU before reading it |
| 73 // from GPU. Image scaling is implemented in content::GlHelper, but it's can't |
| 74 // be used here because it's not in content/public. Move the scaling code |
| 75 // somewhere so that it can be reused here. |
| 76 base::PostTaskAndReplyWithResult( |
| 77 background_task_runner, |
| 78 FROM_HERE, |
| 79 base::Bind(ScaleBitmap, *result->TakeBitmap(), target_size), |
| 80 base::Bind(&OnFrameScalingFinished, callback)); |
| 81 } |
| 82 |
| 83 void SnapshotAsync::EncodeCopyOutputResult( |
| 84 const GrabWindowSnapshotAsyncPNGCallback& callback, |
| 85 scoped_refptr<base::TaskRunner> background_task_runner, |
| 86 scoped_ptr<cc::CopyOutputResult> result) { |
| 87 if (result->IsEmpty()) { |
| 88 callback.Run(scoped_refptr<base::RefCountedBytes>()); |
| 89 return; |
| 90 } |
| 91 |
| 92 // TODO(sergeyu): Potentially images can be scaled on GPU before reading it |
| 93 // from GPU. Image scaling is implemented in content::GlHelper, but it's can't |
| 94 // be used here because it's not in content/public. Move the scaling code |
| 95 // somewhere so that it can be reused here. |
| 96 base::PostTaskAndReplyWithResult( |
| 97 background_task_runner, |
| 98 FROM_HERE, |
| 99 base::Bind(EncodeBitmap, *result->TakeBitmap()), |
| 100 callback); |
| 101 } |
| 102 |
| 103 } // namespace ui |
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