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1 /* | |
2 * Copyright (C) 2011 University of Szeged | |
3 * Copyright (C) 2011 Zoltan Herczeg | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions | |
7 * are met: | |
8 * 1. Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright | |
11 * notice, this list of conditions and the following disclaimer in the | |
12 * documentation and/or other materials provided with the distribution. | |
13 * | |
14 * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY | |
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR | |
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
25 */ | |
26 | |
27 #ifndef FEGaussianBlurNEON_h | |
28 #define FEGaussianBlurNEON_h | |
29 | |
30 #if HAVE(ARM_NEON_INTRINSICS) | |
31 | |
32 #include "core/platform/graphics/cpu/arm/filters/NEONHelpers.h" | |
33 #include "core/platform/graphics/filters/FEGaussianBlur.h" | |
34 | |
35 namespace WebCore { | |
36 | |
37 inline void boxBlurNEON(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* dst
PixelArray, | |
38 unsigned dx, int dxLeft, int dxRight, int stride, int st
rideLine, int effectWidth, int effectHeight) | |
39 { | |
40 uint32_t* sourcePixel = reinterpret_cast<uint32_t*>(srcPixelArray->data()); | |
41 uint32_t* destinationPixel = reinterpret_cast<uint32_t*>(dstPixelArray->data
()); | |
42 | |
43 float32x4_t deltaX = vdupq_n_f32(1.0 / dx); | |
44 int pixelLine = strideLine / 4; | |
45 int pixelStride = stride / 4; | |
46 | |
47 for (int y = 0; y < effectHeight; ++y) { | |
48 int line = y * pixelLine; | |
49 float32x4_t sum = vdupq_n_f32(0); | |
50 // Fill the kernel | |
51 int maxKernelSize = std::min(dxRight, effectWidth); | |
52 for (int i = 0; i < maxKernelSize; ++i) { | |
53 float32x4_t sourcePixelAsFloat = loadRGBA8AsFloat(sourcePixel + line
+ i * pixelStride); | |
54 sum = vaddq_f32(sum, sourcePixelAsFloat); | |
55 } | |
56 | |
57 // Blurring | |
58 for (int x = 0; x < effectWidth; ++x) { | |
59 int pixelOffset = line + x * pixelStride; | |
60 float32x4_t result = vmulq_f32(sum, deltaX); | |
61 storeFloatAsRGBA8(result, destinationPixel + pixelOffset); | |
62 if (x >= dxLeft) { | |
63 float32x4_t sourcePixelAsFloat = loadRGBA8AsFloat(sourcePixel +
pixelOffset - dxLeft * pixelStride); | |
64 sum = vsubq_f32(sum, sourcePixelAsFloat); | |
65 } | |
66 if (x + dxRight < effectWidth) { | |
67 float32x4_t sourcePixelAsFloat = loadRGBA8AsFloat(sourcePixel +
pixelOffset + dxRight * pixelStride); | |
68 sum = vaddq_f32(sum, sourcePixelAsFloat); | |
69 } | |
70 } | |
71 } | |
72 } | |
73 | |
74 } // namespace WebCore | |
75 | |
76 #endif // HAVE(ARM_NEON_INTRINSICS) | |
77 | |
78 #endif // FEGaussianBlurNEON_h | |
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