2 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali/internal/common/image-sampler.h>
30 namespace ImageSampler
36 // @todo MESH_REWORK Remove file after image removal
38 // Adjust these shift sizes if the FilterMode enum grows
39 const int MINIFY_BIT_SHIFT = 0; // Room for 16
40 const int MAGNIFY_BIT_SHIFT = 4;
41 const int UWRAP_BIT_SHIFT = 8;
42 const int VWRAP_BIT_SHIFT = 12;
44 const int MASK_MINIFY_FILTER = 0x0000000F;
45 const int MASK_MAGNIFY_FILTER = 0x000000F0;
46 const int MASK_UWRAP_MODE = 0x00000F00;
47 const int MASK_VWRAP_MODE = 0x0000F000;
52 * Utility to store one of the sampling parameters values.
53 * @param[out] options A bitmask used to store the FilterMode values.
54 * @param[in] factor The FilterMode value.
55 * @param[in] bitshift Used to shift to the correct part of options.
57 void StoreSamplingParameter( unsigned int& options, unsigned int mode, int bitShift )
61 options |= ( mode << bitShift );
66 * Utility to retrieve one of the FilterMode values.
67 * @param[in] options A bitmask of filter values.
68 * @param[in] mask The used to mask unwanted values.
69 * @param[in] bitshift Used to shift to the correct part of options.
70 * @return Return the filter mode.
72 unsigned int RetrieveSamplingParameter( unsigned int options, int mask, int bitShift )
74 unsigned int index = options & mask;
76 index = ( index >> bitShift ); // Zero based index for array
80 unsigned int PackBitfield( FilterMode::Type minify, FilterMode::Type magnify, WrapMode::Type uWrap, WrapMode::Type vWrap )
82 unsigned int bitfield = 0;
83 StoreSamplingParameter( bitfield, minify, MINIFY_BIT_SHIFT );
84 StoreSamplingParameter( bitfield, magnify, MAGNIFY_BIT_SHIFT );
85 StoreSamplingParameter( bitfield, uWrap, UWRAP_BIT_SHIFT );
86 StoreSamplingParameter( bitfield, vWrap, VWRAP_BIT_SHIFT );
90 FilterMode::Type GetMinifyFilterMode( unsigned int bitfield )
92 return static_cast<FilterMode::Type>( RetrieveSamplingParameter( bitfield, MASK_MINIFY_FILTER, MINIFY_BIT_SHIFT ) );
95 FilterMode::Type GetMagnifyFilterMode( unsigned int bitfield )
97 return static_cast<FilterMode::Type>( RetrieveSamplingParameter( bitfield, MASK_MAGNIFY_FILTER, MAGNIFY_BIT_SHIFT ) );
100 WrapMode::Type GetUWrapMode( unsigned int bitfield )
102 return static_cast<WrapMode::Type>( RetrieveSamplingParameter( bitfield, MASK_UWRAP_MODE, UWRAP_BIT_SHIFT ) );
105 WrapMode::Type GetVWrapMode( unsigned int bitfield )
107 return static_cast<WrapMode::Type>( RetrieveSamplingParameter( bitfield, MASK_VWRAP_MODE, VWRAP_BIT_SHIFT ) );
110 } // namespace ImageSampler
112 } // namespace Internal