1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_BLUR_H
#define ANDROID_HWUI_BLUR_H
#include <stdint.h>
#include <cutils/compiler.h>
namespace android {
namespace uirenderer {
class Blur {
public:
// If radius > 0, return the corresponding sigma, else return 0
ANDROID_API static float convertRadiusToSigma(float radius);
// If sigma > 0.5, return the corresponding radius, else return 0
ANDROID_API static float convertSigmaToRadius(float sigma);
// If the original radius was on an integer boundary then after the sigma to
// radius conversion a small rounding error may be introduced. This function
// accounts for that error and snaps to the appropriate integer boundary.
static uint32_t convertRadiusToInt(float radius);
static void generateGaussianWeights(float* weights, int32_t radius);
static void horizontal(float* weights, int32_t radius, const uint8_t* source,
uint8_t* dest, int32_t width, int32_t height);
static void vertical(float* weights, int32_t radius, const uint8_t* source,
uint8_t* dest, int32_t width, int32_t height);
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_BLUR_H
|
