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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 #define _USE_MATH_DEFINES | 5 #define _USE_MATH_DEFINES |
| 6 #include <algorithm> | 6 #include <algorithm> |
| 7 #include <cmath> | 7 #include <cmath> |
| 8 #include <limits> | 8 #include <limits> |
| 9 | 9 |
| 10 #include "skia/ext/image_operations.h" | 10 #include "skia/ext/image_operations.h" |
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| 386 dest_subset.fLeft + dest_subset.width() * w, | 386 dest_subset.fLeft + dest_subset.width() * w, |
| 387 dest_subset.fTop + dest_subset.height() * h }; | 387 dest_subset.fTop + dest_subset.height() * h }; |
| 388 SkBitmap img = ResizeBasic(source, ImageOperations::RESIZE_LANCZOS3, width, | 388 SkBitmap img = ResizeBasic(source, ImageOperations::RESIZE_LANCZOS3, width, |
| 389 height, subset, allocator); | 389 height, subset, allocator); |
| 390 const int row_words = img.rowBytes() / 4; | 390 const int row_words = img.rowBytes() / 4; |
| 391 if (w == 1 && h == 1) | 391 if (w == 1 && h == 1) |
| 392 return img; | 392 return img; |
| 393 | 393 |
| 394 // Render into subpixels. | 394 // Render into subpixels. |
| 395 SkBitmap result; | 395 SkBitmap result; |
| 396 result.setConfig(SkBitmap::kARGB_8888_Config, dest_subset.width(), | 396 result.setInfo(SkImageInfo::MakeN32(dest_subset.width(), dest_subset.height(), |
| 397 dest_subset.height(), 0, img.alphaType()); | 397 img.alphaType()); |
| 398 result.allocPixels(allocator, NULL); | 398 result.allocPixels(allocator, NULL); |
| 399 if (!result.readyToDraw()) | 399 if (!result.readyToDraw()) |
| 400 return img; | 400 return img; |
| 401 | 401 |
| 402 SkAutoLockPixels locker(img); | 402 SkAutoLockPixels locker(img); |
| 403 if (!img.readyToDraw()) | 403 if (!img.readyToDraw()) |
| 404 return img; | 404 return img; |
| 405 | 405 |
| 406 uint32* src_row = img.getAddr32(0, 0); | 406 uint32* src_row = img.getAddr32(0, 0); |
| 407 uint32* dst_row = result.getAddr32(0, 0); | 407 uint32* dst_row = result.getAddr32(0, 0); |
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| 502 dest_width, dest_height, dest_subset); | 502 dest_width, dest_height, dest_subset); |
| 503 | 503 |
| 504 // Get a source bitmap encompassing this touched area. We construct the | 504 // Get a source bitmap encompassing this touched area. We construct the |
| 505 // offsets and row strides such that it looks like a new bitmap, while | 505 // offsets and row strides such that it looks like a new bitmap, while |
| 506 // referring to the old data. | 506 // referring to the old data. |
| 507 const uint8* source_subset = | 507 const uint8* source_subset = |
| 508 reinterpret_cast<const uint8*>(source.getPixels()); | 508 reinterpret_cast<const uint8*>(source.getPixels()); |
| 509 | 509 |
| 510 // Convolve into the result. | 510 // Convolve into the result. |
| 511 SkBitmap result; | 511 SkBitmap result; |
| 512 result.setConfig(SkBitmap::kARGB_8888_Config, dest_subset.width(), | 512 result.setInfo(SkImageInfo::MakeN32(dest_subset.width(), dest_subset.height(),
source.alphaType())); |
| 513 dest_subset.height(), 0, source.alphaType()); | |
| 514 result.allocPixels(allocator, NULL); | 513 result.allocPixels(allocator, NULL); |
| 515 if (!result.readyToDraw()) | 514 if (!result.readyToDraw()) |
| 516 return SkBitmap(); | 515 return SkBitmap(); |
| 517 | 516 |
| 518 BGRAConvolve2D(source_subset, static_cast<int>(source.rowBytes()), | 517 BGRAConvolve2D(source_subset, static_cast<int>(source.rowBytes()), |
| 519 !source.isOpaque(), filter.x_filter(), filter.y_filter(), | 518 !source.isOpaque(), filter.x_filter(), filter.y_filter(), |
| 520 static_cast<int>(result.rowBytes()), | 519 static_cast<int>(result.rowBytes()), |
| 521 static_cast<unsigned char*>(result.getPixels()), | 520 static_cast<unsigned char*>(result.getPixels()), |
| 522 true); | 521 true); |
| 523 | 522 |
| 524 base::TimeDelta delta = base::TimeTicks::Now() - resize_start; | 523 base::TimeDelta delta = base::TimeTicks::Now() - resize_start; |
| 525 UMA_HISTOGRAM_TIMES("Image.ResampleMS", delta); | 524 UMA_HISTOGRAM_TIMES("Image.ResampleMS", delta); |
| 526 | 525 |
| 527 return result; | 526 return result; |
| 528 } | 527 } |
| 529 | 528 |
| 530 // static | 529 // static |
| 531 SkBitmap ImageOperations::Resize(const SkBitmap& source, | 530 SkBitmap ImageOperations::Resize(const SkBitmap& source, |
| 532 ResizeMethod method, | 531 ResizeMethod method, |
| 533 int dest_width, int dest_height, | 532 int dest_width, int dest_height, |
| 534 SkBitmap::Allocator* allocator) { | 533 SkBitmap::Allocator* allocator) { |
| 535 SkIRect dest_subset = { 0, 0, dest_width, dest_height }; | 534 SkIRect dest_subset = { 0, 0, dest_width, dest_height }; |
| 536 return Resize(source, method, dest_width, dest_height, dest_subset, | 535 return Resize(source, method, dest_width, dest_height, dest_subset, |
| 537 allocator); | 536 allocator); |
| 538 } | 537 } |
| 539 | 538 |
| 540 } // namespace skia | 539 } // namespace skia |
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