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| 1 /* | |
| 2 * Copyright (C) 2006-2008 The Android Open Source Project | |
| 3 * | |
| 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 | |
| 7 * | |
| 8 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 * | |
| 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. | |
| 15 */ | |
| 16 | |
| 17 #ifndef SkFilter_DEFINED | |
| 18 #define SkFilter_DEFINED | |
| 19 | |
| 20 #include "SkMath.h" | |
| 21 #include "SkFixed.h" | |
| 22 | |
| 23 typedef unsigned (*SkFilterProc)(unsigned x00, unsigned x01, | |
| 24 unsigned x10, unsigned x11); | |
| 25 | |
| 26 const SkFilterProc* SkGetBilinearFilterProcTable(); | |
| 27 | |
| 28 inline SkFilterProc SkGetBilinearFilterProc(const SkFilterProc* table, | |
| 29 SkFixed x, SkFixed y) | |
| 30 { | |
| 31 SkASSERT(table); | |
| 32 | |
| 33 // convert to dot 2 | |
| 34 x = (unsigned)(x << 16) >> 30; | |
| 35 y = (unsigned)(y << 16) >> 30; | |
| 36 return table[(y << 2) | x]; | |
| 37 } | |
| 38 | |
| 39 inline SkFilterProc SkGetBilinearFilterProc22(const SkFilterProc* table, | |
| 40 unsigned x, unsigned y) | |
| 41 { | |
| 42 SkASSERT(table); | |
| 43 | |
| 44 // extract low 2 bits | |
| 45 x = x << 30 >> 30; | |
| 46 y = y << 30 >> 30; | |
| 47 return table[(y << 2) | x]; | |
| 48 } | |
| 49 | |
| 50 inline const SkFilterProc* SkGetBilinearFilterProc22Row(const SkFilterProc* tabl
e, | |
| 51 unsigned y) | |
| 52 { | |
| 53 SkASSERT(table); | |
| 54 // extract low 2 bits and shift up 2 | |
| 55 return &table[y << 30 >> 28]; | |
| 56 } | |
| 57 | |
| 58 inline SkFilterProc SkGetBilinearFilterProc22RowProc(const SkFilterProc* row, | |
| 59 unsigned x) | |
| 60 { | |
| 61 SkASSERT(row); | |
| 62 // extract low 2 bits | |
| 63 return row[x << 30 >> 30]; | |
| 64 } | |
| 65 | |
| 66 /////////////////////////////////////////////////////////////////////////////// | |
| 67 | |
| 68 typedef unsigned (*SkFilter32Proc)(uint32_t x00, uint32_t x01, | |
| 69 uint32_t x10, uint32_t x11); | |
| 70 | |
| 71 const SkFilter32Proc* SkGetFilter32ProcTable(); | |
| 72 | |
| 73 inline SkFilter32Proc SkGetFilter32Proc22(const SkFilter32Proc* table, | |
| 74 unsigned x, unsigned y) | |
| 75 { | |
| 76 SkASSERT(table); | |
| 77 | |
| 78 // extract low 2 bits | |
| 79 x = x << 30 >> 30; | |
| 80 y = y << 30 >> 30; | |
| 81 return table[(y << 2) | x]; | |
| 82 } | |
| 83 | |
| 84 inline const SkFilter32Proc* SkGetFilter32Proc22Row(const SkFilter32Proc* table, | |
| 85 unsigned y) | |
| 86 { | |
| 87 SkASSERT(table); | |
| 88 // extract low 2 bits and shift up 2 | |
| 89 return &table[y << 30 >> 28]; | |
| 90 } | |
| 91 | |
| 92 inline SkFilter32Proc SkGetFilter32Proc22RowProc(const SkFilter32Proc* row, | |
| 93 unsigned x) | |
| 94 { | |
| 95 SkASSERT(row); | |
| 96 // extract low 2 bits | |
| 97 return row[x << 30 >> 30]; | |
| 98 } | |
| 99 | |
| 100 /////////////////////////////////////////////////////////////////////////////// | |
| 101 | |
| 102 /** Special version of SkFilterProc. This takes the address of 4 ints, and combi
nes them a byte at a | |
| 103 time. AABBCCDD. | |
| 104 */ | |
| 105 typedef uint32_t (*SkFilterPtrProc)(const uint32_t*, const uint32_t*, const uint
32_t*, const uint32_t*); | |
| 106 | |
| 107 const SkFilterPtrProc* SkGetBilinearFilterPtrProcTable(); | |
| 108 inline SkFilterPtrProc SkGetBilinearFilterPtrProc(const SkFilterPtrProc* table,
SkFixed x, SkFixed y) | |
| 109 { | |
| 110 SkASSERT(table); | |
| 111 | |
| 112 // convert to dot 2 | |
| 113 x = (unsigned)(x << 16) >> 30; | |
| 114 y = (unsigned)(y << 16) >> 30; | |
| 115 return table[(y << 2) | x]; | |
| 116 } | |
| 117 | |
| 118 /** Given a Y value, return a subset of the proc table for that value. | |
| 119 Pass this to SkGetBilinearFilterPtrXProc with the corresponding X value to g
et the | |
| 120 correct proc. | |
| 121 */ | |
| 122 inline const SkFilterPtrProc* SkGetBilinearFilterPtrProcYTable(const SkFilterPtr
Proc* table, SkFixed y) | |
| 123 { | |
| 124 SkASSERT(table); | |
| 125 | |
| 126 y = (unsigned)(y << 16) >> 30; | |
| 127 return table + (y << 2); | |
| 128 } | |
| 129 | |
| 130 /** Given a subtable returned by SkGetBilinearFilterPtrProcYTable(), return the
proc for the | |
| 131 specified X value. | |
| 132 */ | |
| 133 inline SkFilterPtrProc SkGetBilinearFilterPtrXProc(const SkFilterPtrProc* table,
SkFixed x) | |
| 134 { | |
| 135 SkASSERT(table); | |
| 136 | |
| 137 // convert to dot 2 | |
| 138 x = (unsigned)(x << 16) >> 30; | |
| 139 return table[x]; | |
| 140 } | |
| 141 | |
| 142 #endif | |
| 143 | |
| 144 | |
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Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/