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Side by Side Diff: skia/ext/convolver.h

Issue 6081007: Start sorting methods in class declarations. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: nits Created 9 years, 11 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 #ifndef SKIA_EXT_CONVOLVER_H_ 5 #ifndef SKIA_EXT_CONVOLVER_H_
6 #define SKIA_EXT_CONVOLVER_H_ 6 #define SKIA_EXT_CONVOLVER_H_
7 #pragma once 7 #pragma once
8 8
9 #include <vector> 9 #include <vector>
10 10
11 // avoid confusion with Mac OS X's math library (Carbon) 11 // avoid confusion with Mac OS X's math library (Carbon)
12 #if defined(__APPLE__) 12 #if defined(__APPLE__)
13 #undef FloatToFixed 13 #undef FloatToFixed
14 #endif 14 #endif
15 15
16 namespace skia { 16 namespace skia {
17 17
18 // Represents a filter in one dimension. Each output pixel has one entry in this 18 // Represents a filter in one dimension. Each output pixel has one entry in this
19 // object for the filter values contributing to it. You build up the filter 19 // object for the filter values contributing to it. You build up the filter
20 // list by calling AddFilter for each output pixel (in order). 20 // list by calling AddFilter for each output pixel (in order).
21 // 21 //
22 // We do 2-dimensional convolution by first convolving each row by one 22 // We do 2-dimensional convolution by first convolving each row by one
23 // ConvolutionFilter1D, then convolving each column by another one. 23 // ConvolutionFilter1D, then convolving each column by another one.
24 // 24 //
25 // Entries are stored in fixed point, shifted left by kShiftBits. 25 // Entries are stored in fixed point, shifted left by kShiftBits.
26 class ConvolutionFilter1D { 26 class ConvolutionFilter1D {
27 public: 27 public:
28 typedef short Fixed;
29
28 // The number of bits that fixed point values are shifted by. 30 // The number of bits that fixed point values are shifted by.
29 enum { kShiftBits = 14 }; 31 enum { kShiftBits = 14 };
30 32
31 typedef short Fixed;
32
33 ConvolutionFilter1D(); 33 ConvolutionFilter1D();
34 ~ConvolutionFilter1D(); 34 ~ConvolutionFilter1D();
35 35
36 // Convert between floating point and our fixed point representation. 36 // Convert between floating point and our fixed point representation.
37 static Fixed FloatToFixed(float f) { 37 static Fixed FloatToFixed(float f) {
38 return static_cast<Fixed>(f * (1 << kShiftBits)); 38 return static_cast<Fixed>(f * (1 << kShiftBits));
39 } 39 }
40 static unsigned char FixedToChar(Fixed x) { 40 static unsigned char FixedToChar(Fixed x) {
41 return static_cast<unsigned char>(x >> kShiftBits); 41 return static_cast<unsigned char>(x >> kShiftBits);
42 } 42 }
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129 int source_byte_row_stride, 129 int source_byte_row_stride,
130 bool source_has_alpha, 130 bool source_has_alpha,
131 const ConvolutionFilter1D& xfilter, 131 const ConvolutionFilter1D& xfilter,
132 const ConvolutionFilter1D& yfilter, 132 const ConvolutionFilter1D& yfilter,
133 unsigned char* output); 133 unsigned char* output);
134 134
135 } // namespace skia 135 } // namespace skia
136 136
137 #endif // SKIA_EXT_CONVOLVER_H_ 137 #endif // SKIA_EXT_CONVOLVER_H_
138 138
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