epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2006 The Android Open Source Project |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | |
| 10 | #include "SkDrawGradient.h" |
| 11 | #include "SkAnimateMaker.h" |
| 12 | #include "SkAnimatorScript.h" |
| 13 | #include "SkGradientShader.h" |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 14 | #include "SkUnitMapper.h" |
| 15 | |
| 16 | static SkScalar SkUnitToScalar(U16CPU x) { |
| 17 | return x / 65535.0f; |
| 18 | } |
| 19 | |
| 20 | static U16CPU SkScalarToUnit(SkScalar x) { |
| 21 | SkScalar pin = SkScalarPin(x, 0, SK_Scalar1); |
| 22 | return (int) (pin * 65535.0f); |
| 23 | } |
| 24 | |
| 25 | class SkDrawGradientUnitMapper : public SkUnitMapper { |
| 26 | public: |
| 27 | SkDrawGradientUnitMapper(SkAnimateMaker* maker, const char* script) : fMaker(maker), fScript(script) { |
| 28 | } |
| 29 | |
| 30 | SK_DECLARE_UNFLATTENABLE_OBJECT() |
| 31 | |
| 32 | protected: |
| 33 | virtual uint16_t mapUnit16(uint16_t x) { |
| 34 | fUnit = SkUnitToScalar(x); |
| 35 | SkScriptValue value; |
| 36 | SkAnimatorScript engine(*fMaker, NULL, SkType_Float); |
| 37 | engine.propertyCallBack(GetUnitValue, &fUnit); |
| 38 | if (engine.evaluate(fScript, &value, SkType_Float)) |
| 39 | x = SkScalarToUnit(value.fOperand.fScalar); |
| 40 | return x; |
| 41 | } |
| 42 | |
| 43 | static bool GetUnitValue(const char* token, size_t len, void* unitPtr, SkScriptValue* value) { |
| 44 | if (SK_LITERAL_STR_EQUAL("unit", token, len)) { |
| 45 | value->fOperand.fScalar = *(SkScalar*) unitPtr; |
| 46 | value->fType = SkType_Float; |
| 47 | return true; |
| 48 | } |
| 49 | return false; |
| 50 | } |
| 51 | |
| 52 | SkAnimateMaker* fMaker; |
| 53 | const char* fScript; |
| 54 | SkScalar fUnit; |
| 55 | }; |
| 56 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 57 | |
| 58 | #if SK_USE_CONDENSED_INFO == 0 |
| 59 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 60 | const SkMemberInfo SkDrawGradient::fInfo[] = { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 61 | SK_MEMBER_INHERITED, |
| 62 | SK_MEMBER_ARRAY(offsets, Float), |
| 63 | SK_MEMBER(unitMapper, String) |
| 64 | }; |
| 65 | |
| 66 | #endif |
| 67 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 68 | DEFINE_GET_MEMBER(SkDrawGradient); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 69 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 70 | SkDrawGradient::SkDrawGradient() : fUnitMapper(NULL) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 71 | } |
| 72 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 73 | SkDrawGradient::~SkDrawGradient() { |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 74 | for (int index = 0; index < fDrawColors.count(); index++) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 75 | delete fDrawColors[index]; |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 76 | delete fUnitMapper; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 77 | } |
| 78 | |
tfarina@chromium.org | 1d3c411 | 2012-12-03 14:38:08 +0000 | [diff] [blame] | 79 | bool SkDrawGradient::addChild(SkAnimateMaker& , SkDisplayable* child) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 80 | SkASSERT(child); |
| 81 | if (child->isColor()) { |
| 82 | SkDrawColor* color = (SkDrawColor*) child; |
| 83 | *fDrawColors.append() = color; |
| 84 | return true; |
| 85 | } |
| 86 | return false; |
| 87 | } |
| 88 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 89 | int SkDrawGradient::addPrelude() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 90 | int count = fDrawColors.count(); |
| 91 | fColors.setCount(count); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 92 | for (int index = 0; index < count; index++) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 93 | fColors[index] = fDrawColors[index]->color; |
| 94 | return count; |
| 95 | } |
| 96 | |
| 97 | #ifdef SK_DUMP_ENABLED |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 98 | void SkDrawGradient::dumpRest(SkAnimateMaker* maker) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 99 | dumpAttrs(maker); |
| 100 | //can a gradient have no colors? |
| 101 | bool closedYet = false; |
| 102 | SkDisplayList::fIndent += 4; |
| 103 | for (SkDrawColor** ptr = fDrawColors.begin(); ptr < fDrawColors.end(); ptr++) { |
| 104 | if (closedYet == false) { |
| 105 | SkDebugf(">\n"); |
| 106 | closedYet = true; |
| 107 | } |
| 108 | SkDrawColor* color = *ptr; |
| 109 | color->dump(maker); |
| 110 | } |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 111 | SkDisplayList::fIndent -= 4; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 112 | dumpChildren(maker, closedYet); //dumps the matrix if it has one |
| 113 | } |
| 114 | #endif |
| 115 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 116 | void SkDrawGradient::onEndElement(SkAnimateMaker& maker) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 117 | if (offsets.count() != 0) { |
| 118 | if (offsets.count() != fDrawColors.count()) { |
| 119 | maker.setErrorCode(SkDisplayXMLParserError::kGradientOffsetsDontMatchColors); |
| 120 | return; |
| 121 | } |
| 122 | if (offsets[0] != 0) { |
| 123 | maker.setErrorCode(SkDisplayXMLParserError::kGradientOffsetsMustStartWithZero); |
| 124 | return; |
| 125 | } |
| 126 | if (offsets[offsets.count()-1] != SK_Scalar1) { |
| 127 | maker.setErrorCode(SkDisplayXMLParserError::kGradientOffsetsMustEndWithOne); |
| 128 | return; |
| 129 | } |
| 130 | for (int i = 1; i < offsets.count(); i++) { |
| 131 | if (offsets[i] <= offsets[i-1]) { |
| 132 | maker.setErrorCode(SkDisplayXMLParserError::kGradientOffsetsMustIncrease); |
| 133 | return; |
| 134 | } |
| 135 | if (offsets[i] > SK_Scalar1) { |
| 136 | maker.setErrorCode(SkDisplayXMLParserError::kGradientOffsetsMustBeNoMoreThanOne); |
| 137 | return; |
| 138 | } |
| 139 | } |
| 140 | } |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 141 | if (unitMapper.size() > 0) |
| 142 | fUnitMapper = new SkDrawGradientUnitMapper(&maker, unitMapper.c_str()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 143 | INHERITED::onEndElement(maker); |
| 144 | } |
| 145 | |
| 146 | #if SK_USE_CONDENSED_INFO == 0 |
| 147 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 148 | const SkMemberInfo SkDrawLinearGradient::fInfo[] = { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 149 | SK_MEMBER_INHERITED, |
| 150 | SK_MEMBER_ARRAY(points, Float), |
| 151 | }; |
| 152 | |
| 153 | #endif |
| 154 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 155 | DEFINE_GET_MEMBER(SkDrawLinearGradient); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 156 | |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 157 | SkDrawLinearGradient::SkDrawLinearGradient() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 158 | } |
| 159 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 160 | void SkDrawLinearGradient::onEndElement(SkAnimateMaker& maker) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 161 | { |
| 162 | if (points.count() != 4) |
| 163 | maker.setErrorCode(SkDisplayXMLParserError::kGradientPointsLengthMustBeFour); |
| 164 | INHERITED::onEndElement(maker); |
| 165 | } |
| 166 | |
| 167 | #ifdef SK_DUMP_ENABLED |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 168 | void SkDrawLinearGradient::dump(SkAnimateMaker* maker) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 169 | dumpBase(maker); |
| 170 | dumpRest(maker); |
| 171 | } |
| 172 | #endif |
| 173 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 174 | SkShader* SkDrawLinearGradient::getShader() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 175 | if (addPrelude() == 0 || points.count() != 4) |
| 176 | return NULL; |
| 177 | SkShader* shader = SkGradientShader::CreateLinear((SkPoint*)points.begin(), |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 178 | fColors.begin(), offsets.begin(), fColors.count(), (SkShader::TileMode) tileMode, |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 179 | fUnitMapper, 0, getMatrix()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 180 | SkAutoTDelete<SkShader> autoDel(shader); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 181 | (void)autoDel.detach(); |
| 182 | return shader; |
| 183 | } |
| 184 | |
| 185 | |
| 186 | #if SK_USE_CONDENSED_INFO == 0 |
| 187 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 188 | const SkMemberInfo SkDrawRadialGradient::fInfo[] = { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 189 | SK_MEMBER_INHERITED, |
| 190 | SK_MEMBER(center, Point), |
| 191 | SK_MEMBER(radius, Float) |
| 192 | }; |
| 193 | |
| 194 | #endif |
| 195 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 196 | DEFINE_GET_MEMBER(SkDrawRadialGradient); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 197 | |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 198 | SkDrawRadialGradient::SkDrawRadialGradient() : radius(0) { |
| 199 | center.set(0, 0); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | #ifdef SK_DUMP_ENABLED |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 203 | void SkDrawRadialGradient::dump(SkAnimateMaker* maker) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 204 | dumpBase(maker); |
| 205 | dumpRest(maker); |
| 206 | } |
| 207 | #endif |
| 208 | |
rileya@google.com | 9954776 | 2012-07-26 21:25:09 +0000 | [diff] [blame] | 209 | SkShader* SkDrawRadialGradient::getShader() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 210 | if (addPrelude() == 0) |
| 211 | return NULL; |
| 212 | SkShader* shader = SkGradientShader::CreateRadial(center, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 213 | radius, fColors.begin(), offsets.begin(), fColors.count(), (SkShader::TileMode) tileMode, |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 214 | fUnitMapper, 0, getMatrix()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 215 | SkAutoTDelete<SkShader> autoDel(shader); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 216 | (void)autoDel.detach(); |
| 217 | return shader; |
| 218 | } |