humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
bungeman | d3ebb48 | 2015-08-05 13:57:49 -0700 | [diff] [blame^] | 8 | #include "SkBitmapFilter.h" |
humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 9 | #include "SkRTConf.h" |
bungeman | d3ebb48 | 2015-08-05 13:57:49 -0700 | [diff] [blame^] | 10 | #include "SkTypes.h" |
| 11 | |
| 12 | #include <string.h> |
humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 13 | |
humper@google.com | 138ebc3 | 2013-07-19 20:20:04 +0000 | [diff] [blame] | 14 | // These are the per-scanline callbacks that are used when we must resort to |
| 15 | // resampling an image as it is blitted. Typically these are used only when |
| 16 | // the image is rotated or has some other complex transformation applied. |
| 17 | // Scaled images will usually be rescaled directly before rasterization. |
| 18 | |
humper@google.com | 138ebc3 | 2013-07-19 20:20:04 +0000 | [diff] [blame] | 19 | SK_CONF_DECLARE(const char *, c_bitmapFilter, "bitmap.filter", "mitchell", "Which scanline bitmap filter to use [mitchell, lanczos, hamming, gaussian, triangle, box]"); |
skia.committer@gmail.com | 9e1ec1a | 2013-07-10 07:00:58 +0000 | [diff] [blame] | 20 | |
humper@google.com | 138ebc3 | 2013-07-19 20:20:04 +0000 | [diff] [blame] | 21 | SkBitmapFilter *SkBitmapFilter::Allocate() { |
humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 22 | if (!strcmp(c_bitmapFilter, "mitchell")) { |
| 23 | return SkNEW_ARGS(SkMitchellFilter,(1.f/3.f,1.f/3.f)); |
humper@google.com | 138ebc3 | 2013-07-19 20:20:04 +0000 | [diff] [blame] | 24 | } else if (!strcmp(c_bitmapFilter, "lanczos")) { |
| 25 | return SkNEW(SkLanczosFilter); |
| 26 | } else if (!strcmp(c_bitmapFilter, "hamming")) { |
| 27 | return SkNEW(SkHammingFilter); |
humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 28 | } else if (!strcmp(c_bitmapFilter, "gaussian")) { |
| 29 | return SkNEW_ARGS(SkGaussianFilter,(2)); |
| 30 | } else if (!strcmp(c_bitmapFilter, "triangle")) { |
| 31 | return SkNEW(SkTriangleFilter); |
| 32 | } else if (!strcmp(c_bitmapFilter, "box")) { |
| 33 | return SkNEW(SkBoxFilter); |
| 34 | } else { |
mtklein@google.com | 330313a | 2013-08-22 15:37:26 +0000 | [diff] [blame] | 35 | SkDEBUGFAIL("Unknown filter type"); |
humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 36 | } |
skia.committer@gmail.com | 9e1ec1a | 2013-07-10 07:00:58 +0000 | [diff] [blame] | 37 | |
humper@google.com | b088947 | 2013-07-09 21:37:14 +0000 | [diff] [blame] | 38 | return NULL; |
| 39 | } |
| 40 | |