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 "platform/graphics/cpu/arm/filters/NEONHelpers.h"
33 #include "platform/graphics/filters/FEGaussianBlur.h"
34
35 namespace WebCore {
36
boxBlurNEON(Uint8ClampedArray * srcPixelArray,Uint8ClampedArray * dstPixelArray,unsigned dx,int dxLeft,int dxRight,int stride,int strideLine,int effectWidth,int effectHeight)37 inline void boxBlurNEON(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* dstPixelArray,
38 unsigned dx, int dxLeft, int dxRight, int stride, int strideLine, 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
79