rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkGradientShaderPriv.h" |
| 9 | #include "SkLinearGradient.h" |
| 10 | #include "SkRadialGradient.h" |
| 11 | #include "SkTwoPointRadialGradient.h" |
| 12 | #include "SkTwoPointConicalGradient.h" |
| 13 | #include "SkSweepGradient.h" |
| 14 | |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 15 | SkGradientShaderBase::SkGradientShaderBase(const Descriptor& desc, const SkMatrix* localMatrix) |
| 16 | : INHERITED(localMatrix) |
| 17 | { |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 18 | SkASSERT(desc.fCount > 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 19 | |
commit-bot@chromium.org | 6c5aea2 | 2014-04-22 16:25:15 +0000 | [diff] [blame] | 20 | fGradFlags = SkToU8(desc.fGradFlags); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 21 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 22 | SkASSERT((unsigned)desc.fTileMode < SkShader::kTileModeCount); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 23 | SkASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gTileProcs)); |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 24 | fTileMode = desc.fTileMode; |
| 25 | fTileProc = gTileProcs[desc.fTileMode]; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 26 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 27 | /* Note: we let the caller skip the first and/or last position. |
| 28 | i.e. pos[0] = 0.3, pos[1] = 0.7 |
| 29 | In these cases, we insert dummy entries to ensure that the final data |
| 30 | will be bracketed by [0, 1]. |
| 31 | i.e. our_pos[0] = 0, our_pos[1] = 0.3, our_pos[2] = 0.7, our_pos[3] = 1 |
| 32 | |
| 33 | Thus colorCount (the caller's value, and fColorCount (our value) may |
| 34 | differ by up to 2. In the above example: |
| 35 | colorCount = 2 |
| 36 | fColorCount = 4 |
| 37 | */ |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 38 | fColorCount = desc.fCount; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 39 | // check if we need to add in dummy start and/or end position/colors |
| 40 | bool dummyFirst = false; |
| 41 | bool dummyLast = false; |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 42 | if (desc.fPos) { |
| 43 | dummyFirst = desc.fPos[0] != 0; |
| 44 | dummyLast = desc.fPos[desc.fCount - 1] != SK_Scalar1; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 45 | fColorCount += dummyFirst + dummyLast; |
| 46 | } |
| 47 | |
| 48 | if (fColorCount > kColorStorageCount) { |
| 49 | size_t size = sizeof(SkColor) + sizeof(Rec); |
| 50 | fOrigColors = reinterpret_cast<SkColor*>( |
| 51 | sk_malloc_throw(size * fColorCount)); |
| 52 | } |
| 53 | else { |
| 54 | fOrigColors = fStorage; |
| 55 | } |
| 56 | |
| 57 | // Now copy over the colors, adding the dummies as needed |
| 58 | { |
| 59 | SkColor* origColors = fOrigColors; |
| 60 | if (dummyFirst) { |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 61 | *origColors++ = desc.fColors[0]; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 62 | } |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 63 | memcpy(origColors, desc.fColors, desc.fCount * sizeof(SkColor)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 64 | if (dummyLast) { |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 65 | origColors += desc.fCount; |
| 66 | *origColors = desc.fColors[desc.fCount - 1]; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 67 | } |
| 68 | } |
| 69 | |
| 70 | fRecs = (Rec*)(fOrigColors + fColorCount); |
| 71 | if (fColorCount > 2) { |
| 72 | Rec* recs = fRecs; |
| 73 | recs->fPos = 0; |
| 74 | // recs->fScale = 0; // unused; |
| 75 | recs += 1; |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 76 | if (desc.fPos) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 77 | /* We need to convert the user's array of relative positions into |
| 78 | fixed-point positions and scale factors. We need these results |
| 79 | to be strictly monotonic (no two values equal or out of order). |
| 80 | Hence this complex loop that just jams a zero for the scale |
| 81 | value if it sees a segment out of order, and it assures that |
| 82 | we start at 0 and end at 1.0 |
| 83 | */ |
| 84 | SkFixed prev = 0; |
| 85 | int startIndex = dummyFirst ? 0 : 1; |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 86 | int count = desc.fCount + dummyLast; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 87 | for (int i = startIndex; i < count; i++) { |
| 88 | // force the last value to be 1.0 |
| 89 | SkFixed curr; |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 90 | if (i == desc.fCount) { // we're really at the dummyLast |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 91 | curr = SK_Fixed1; |
| 92 | } else { |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 93 | curr = SkScalarToFixed(desc.fPos[i]); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 94 | } |
| 95 | // pin curr withing range |
| 96 | if (curr < 0) { |
| 97 | curr = 0; |
| 98 | } else if (curr > SK_Fixed1) { |
| 99 | curr = SK_Fixed1; |
| 100 | } |
| 101 | recs->fPos = curr; |
| 102 | if (curr > prev) { |
| 103 | recs->fScale = (1 << 24) / (curr - prev); |
| 104 | } else { |
| 105 | recs->fScale = 0; // ignore this segment |
| 106 | } |
| 107 | // get ready for the next value |
| 108 | prev = curr; |
| 109 | recs += 1; |
| 110 | } |
| 111 | } else { // assume even distribution |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 112 | SkFixed dp = SK_Fixed1 / (desc.fCount - 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 113 | SkFixed p = dp; |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 114 | SkFixed scale = (desc.fCount - 1) << 8; // (1 << 24) / dp |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 115 | for (int i = 1; i < desc.fCount - 1; i++) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 116 | recs->fPos = p; |
| 117 | recs->fScale = scale; |
| 118 | recs += 1; |
| 119 | p += dp; |
| 120 | } |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 121 | recs->fPos = SK_Fixed1; |
commit-bot@chromium.org | 811f20d | 2014-04-21 21:09:49 +0000 | [diff] [blame] | 122 | recs->fScale = scale; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 123 | } |
| 124 | } |
| 125 | this->initCommon(); |
| 126 | } |
| 127 | |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 128 | static uint32_t pack_mode_flags(SkShader::TileMode mode, uint32_t flags) { |
| 129 | SkASSERT(0 == (flags >> 28)); |
| 130 | SkASSERT(0 == ((uint32_t)mode >> 4)); |
| 131 | return (flags << 4) | mode; |
| 132 | } |
| 133 | |
| 134 | static SkShader::TileMode unpack_mode(uint32_t packed) { |
| 135 | return (SkShader::TileMode)(packed & 0xF); |
| 136 | } |
| 137 | |
| 138 | static uint32_t unpack_flags(uint32_t packed) { |
| 139 | return packed >> 4; |
| 140 | } |
| 141 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 142 | SkGradientShaderBase::SkGradientShaderBase(SkReadBuffer& buffer) : INHERITED(buffer) { |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 143 | if (buffer.isVersionLT(SkReadBuffer::kNoUnitMappers_Version)) { |
| 144 | // skip the old SkUnitMapper slot |
| 145 | buffer.skipFlattenable(); |
| 146 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 147 | |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 148 | int colorCount = fColorCount = buffer.getArrayCount(); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 149 | if (colorCount > kColorStorageCount) { |
commit-bot@chromium.org | ef74fa1 | 2013-12-17 20:49:46 +0000 | [diff] [blame] | 150 | size_t allocSize = (sizeof(SkColor) + sizeof(SkPMColor) + sizeof(Rec)) * colorCount; |
| 151 | if (buffer.validateAvailable(allocSize)) { |
| 152 | fOrigColors = reinterpret_cast<SkColor*>(sk_malloc_throw(allocSize)); |
| 153 | } else { |
| 154 | fOrigColors = NULL; |
| 155 | colorCount = fColorCount = 0; |
| 156 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 157 | } else { |
| 158 | fOrigColors = fStorage; |
| 159 | } |
commit-bot@chromium.org | 0251288 | 2013-10-31 18:37:50 +0000 | [diff] [blame] | 160 | buffer.readColorArray(fOrigColors, colorCount); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 161 | |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 162 | { |
| 163 | uint32_t packed = buffer.readUInt(); |
| 164 | fGradFlags = SkToU8(unpack_flags(packed)); |
| 165 | fTileMode = unpack_mode(packed); |
| 166 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 167 | fTileProc = gTileProcs[fTileMode]; |
| 168 | fRecs = (Rec*)(fOrigColors + colorCount); |
| 169 | if (colorCount > 2) { |
| 170 | Rec* recs = fRecs; |
| 171 | recs[0].fPos = 0; |
| 172 | for (int i = 1; i < colorCount; i++) { |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 173 | recs[i].fPos = buffer.readInt(); |
| 174 | recs[i].fScale = buffer.readUInt(); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 175 | } |
| 176 | } |
| 177 | buffer.readMatrix(&fPtsToUnit); |
| 178 | this->initCommon(); |
| 179 | } |
| 180 | |
| 181 | SkGradientShaderBase::~SkGradientShaderBase() { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 182 | if (fOrigColors != fStorage) { |
| 183 | sk_free(fOrigColors); |
| 184 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | void SkGradientShaderBase::initCommon() { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 188 | unsigned colorAlpha = 0xFF; |
| 189 | for (int i = 0; i < fColorCount; i++) { |
| 190 | colorAlpha &= SkColorGetA(fOrigColors[i]); |
| 191 | } |
| 192 | fColorsAreOpaque = colorAlpha == 0xFF; |
| 193 | } |
| 194 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 195 | void SkGradientShaderBase::flatten(SkWriteBuffer& buffer) const { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 196 | this->INHERITED::flatten(buffer); |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 197 | buffer.writeColorArray(fOrigColors, fColorCount); |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 198 | buffer.writeUInt(pack_mode_flags(fTileMode, fGradFlags)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 199 | if (fColorCount > 2) { |
| 200 | Rec* recs = fRecs; |
| 201 | for (int i = 1; i < fColorCount; i++) { |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 202 | buffer.writeInt(recs[i].fPos); |
| 203 | buffer.writeUInt(recs[i].fScale); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 204 | } |
| 205 | } |
| 206 | buffer.writeMatrix(fPtsToUnit); |
| 207 | } |
| 208 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 209 | SkGradientShaderBase::GpuColorType SkGradientShaderBase::getGpuColorType(SkColor colors[3]) const { |
| 210 | if (fColorCount <= 3) { |
| 211 | memcpy(colors, fOrigColors, fColorCount * sizeof(SkColor)); |
| 212 | } |
| 213 | |
| 214 | if (SkShader::kClamp_TileMode == fTileMode) { |
| 215 | if (2 == fColorCount) { |
| 216 | return kTwo_GpuColorType; |
| 217 | } else if (3 == fColorCount && |
| 218 | (SkScalarAbs( |
| 219 | SkFixedToScalar(fRecs[1].fPos) - SK_ScalarHalf) < SK_Scalar1 / 1000)) { |
| 220 | return kThree_GpuColorType; |
| 221 | } |
| 222 | } |
| 223 | return kTexture_GpuColorType; |
| 224 | } |
| 225 | |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 226 | void SkGradientShaderBase::FlipGradientColors(SkColor* colorDst, Rec* recDst, |
| 227 | SkColor* colorSrc, Rec* recSrc, |
| 228 | int count) { |
| 229 | SkAutoSTArray<8, SkColor> colorsTemp(count); |
| 230 | for (int i = 0; i < count; ++i) { |
| 231 | int offset = count - i - 1; |
| 232 | colorsTemp[i] = colorSrc[offset]; |
| 233 | } |
| 234 | if (count > 2) { |
| 235 | SkAutoSTArray<8, Rec> recsTemp(count); |
| 236 | for (int i = 0; i < count; ++i) { |
| 237 | int offset = count - i - 1; |
| 238 | recsTemp[i].fPos = SK_Fixed1 - recSrc[offset].fPos; |
| 239 | recsTemp[i].fScale = recSrc[offset].fScale; |
| 240 | } |
| 241 | memcpy(recDst, recsTemp.get(), count * sizeof(Rec)); |
| 242 | } |
| 243 | memcpy(colorDst, colorsTemp.get(), count * sizeof(SkColor)); |
| 244 | } |
| 245 | |
| 246 | void SkGradientShaderBase::flipGradientColors() { |
skia.committer@gmail.com | d3b28e8 | 2014-04-22 03:05:17 +0000 | [diff] [blame] | 247 | FlipGradientColors(fOrigColors, fRecs, fOrigColors, fRecs, fColorCount); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 248 | } |
| 249 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 250 | bool SkGradientShaderBase::isOpaque() const { |
| 251 | return fColorsAreOpaque; |
| 252 | } |
| 253 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 254 | SkGradientShaderBase::GradientShaderBaseContext::GradientShaderBaseContext( |
commit-bot@chromium.org | e901b6d | 2014-05-01 19:31:31 +0000 | [diff] [blame] | 255 | const SkGradientShaderBase& shader, const ContextRec& rec) |
| 256 | : INHERITED(shader, rec) |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 257 | , fCache(shader.refCache(getPaintAlpha())) |
| 258 | { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 259 | const SkMatrix& inverse = this->getTotalInverse(); |
| 260 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 261 | fDstToIndex.setConcat(shader.fPtsToUnit, inverse); |
| 262 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 263 | fDstToIndexProc = fDstToIndex.getMapXYProc(); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 264 | fDstToIndexClass = (uint8_t)SkShader::Context::ComputeMatrixClass(fDstToIndex); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 265 | |
| 266 | // now convert our colors in to PMColors |
| 267 | unsigned paintAlpha = this->getPaintAlpha(); |
| 268 | |
| 269 | fFlags = this->INHERITED::getFlags(); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 270 | if (shader.fColorsAreOpaque && paintAlpha == 0xFF) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 271 | fFlags |= kOpaqueAlpha_Flag; |
| 272 | } |
| 273 | // we can do span16 as long as our individual colors are opaque, |
| 274 | // regardless of the paint's alpha |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 275 | if (shader.fColorsAreOpaque) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 276 | fFlags |= kHasSpan16_Flag; |
| 277 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 278 | } |
| 279 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 280 | SkGradientShaderBase::GradientShaderCache::GradientShaderCache( |
| 281 | U8CPU alpha, const SkGradientShaderBase& shader) |
| 282 | : fCacheAlpha(alpha) |
| 283 | , fShader(shader) |
| 284 | , fCache16Inited(false) |
| 285 | , fCache32Inited(false) |
| 286 | { |
| 287 | // Only initialize the cache in getCache16/32. |
| 288 | fCache16 = NULL; |
| 289 | fCache32 = NULL; |
| 290 | fCache16Storage = NULL; |
| 291 | fCache32PixelRef = NULL; |
| 292 | } |
| 293 | |
| 294 | SkGradientShaderBase::GradientShaderCache::~GradientShaderCache() { |
| 295 | sk_free(fCache16Storage); |
| 296 | SkSafeUnref(fCache32PixelRef); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | #define Fixed_To_Dot8(x) (((x) + 0x80) >> 8) |
| 300 | |
| 301 | /** We take the original colors, not our premultiplied PMColors, since we can |
| 302 | build a 16bit table as long as the original colors are opaque, even if the |
| 303 | paint specifies a non-opaque alpha. |
| 304 | */ |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 305 | void SkGradientShaderBase::GradientShaderCache::Build16bitCache( |
| 306 | uint16_t cache[], SkColor c0, SkColor c1, int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 307 | SkASSERT(count > 1); |
| 308 | SkASSERT(SkColorGetA(c0) == 0xFF); |
| 309 | SkASSERT(SkColorGetA(c1) == 0xFF); |
| 310 | |
| 311 | SkFixed r = SkColorGetR(c0); |
| 312 | SkFixed g = SkColorGetG(c0); |
| 313 | SkFixed b = SkColorGetB(c0); |
| 314 | |
| 315 | SkFixed dr = SkIntToFixed(SkColorGetR(c1) - r) / (count - 1); |
| 316 | SkFixed dg = SkIntToFixed(SkColorGetG(c1) - g) / (count - 1); |
| 317 | SkFixed db = SkIntToFixed(SkColorGetB(c1) - b) / (count - 1); |
| 318 | |
| 319 | r = SkIntToFixed(r) + 0x8000; |
| 320 | g = SkIntToFixed(g) + 0x8000; |
| 321 | b = SkIntToFixed(b) + 0x8000; |
| 322 | |
| 323 | do { |
| 324 | unsigned rr = r >> 16; |
| 325 | unsigned gg = g >> 16; |
| 326 | unsigned bb = b >> 16; |
| 327 | cache[0] = SkPackRGB16(SkR32ToR16(rr), SkG32ToG16(gg), SkB32ToB16(bb)); |
| 328 | cache[kCache16Count] = SkDitherPack888ToRGB16(rr, gg, bb); |
| 329 | cache += 1; |
| 330 | r += dr; |
| 331 | g += dg; |
| 332 | b += db; |
| 333 | } while (--count != 0); |
| 334 | } |
| 335 | |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 336 | /* |
| 337 | * r,g,b used to be SkFixed, but on gcc (4.2.1 mac and 4.6.3 goobuntu) in |
| 338 | * release builds, we saw a compiler error where the 0xFF parameter in |
| 339 | * SkPackARGB32() was being totally ignored whenever it was called with |
| 340 | * a non-zero add (e.g. 0x8000). |
| 341 | * |
| 342 | * We found two work-arounds: |
| 343 | * 1. change r,g,b to unsigned (or just one of them) |
| 344 | * 2. change SkPackARGB32 to + its (a << SK_A32_SHIFT) value instead |
| 345 | * of using | |
| 346 | * |
| 347 | * We chose #1 just because it was more localized. |
| 348 | * See http://code.google.com/p/skia/issues/detail?id=1113 |
| 349 | * |
| 350 | * The type SkUFixed encapsulate this need for unsigned, but logically Fixed. |
| 351 | */ |
| 352 | typedef uint32_t SkUFixed; |
| 353 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 354 | void SkGradientShaderBase::GradientShaderCache::Build32bitCache( |
| 355 | SkPMColor cache[], SkColor c0, SkColor c1, |
| 356 | int count, U8CPU paintAlpha, uint32_t gradFlags) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 357 | SkASSERT(count > 1); |
| 358 | |
| 359 | // need to apply paintAlpha to our two endpoints |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 360 | uint32_t a0 = SkMulDiv255Round(SkColorGetA(c0), paintAlpha); |
| 361 | uint32_t a1 = SkMulDiv255Round(SkColorGetA(c1), paintAlpha); |
| 362 | |
| 363 | |
| 364 | const bool interpInPremul = SkToBool(gradFlags & |
| 365 | SkGradientShader::kInterpolateColorsInPremul_Flag); |
| 366 | |
| 367 | uint32_t r0 = SkColorGetR(c0); |
| 368 | uint32_t g0 = SkColorGetG(c0); |
| 369 | uint32_t b0 = SkColorGetB(c0); |
| 370 | |
| 371 | uint32_t r1 = SkColorGetR(c1); |
| 372 | uint32_t g1 = SkColorGetG(c1); |
| 373 | uint32_t b1 = SkColorGetB(c1); |
| 374 | |
| 375 | if (interpInPremul) { |
| 376 | r0 = SkMulDiv255Round(r0, a0); |
| 377 | g0 = SkMulDiv255Round(g0, a0); |
| 378 | b0 = SkMulDiv255Round(b0, a0); |
| 379 | |
| 380 | r1 = SkMulDiv255Round(r1, a1); |
| 381 | g1 = SkMulDiv255Round(g1, a1); |
| 382 | b1 = SkMulDiv255Round(b1, a1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 383 | } |
| 384 | |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 385 | SkFixed da = SkIntToFixed(a1 - a0) / (count - 1); |
| 386 | SkFixed dr = SkIntToFixed(r1 - r0) / (count - 1); |
| 387 | SkFixed dg = SkIntToFixed(g1 - g0) / (count - 1); |
| 388 | SkFixed db = SkIntToFixed(b1 - b0) / (count - 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 389 | |
reed@google.com | d8e0d6a | 2013-02-08 19:48:12 +0000 | [diff] [blame] | 390 | /* We pre-add 1/8 to avoid having to add this to our [0] value each time |
| 391 | in the loop. Without this, the bias for each would be |
| 392 | 0x2000 0xA000 0xE000 0x6000 |
| 393 | With this trick, we can add 0 for the first (no-op) and just adjust the |
| 394 | others. |
| 395 | */ |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 396 | SkUFixed a = SkIntToFixed(a0) + 0x2000; |
| 397 | SkUFixed r = SkIntToFixed(r0) + 0x2000; |
| 398 | SkUFixed g = SkIntToFixed(g0) + 0x2000; |
| 399 | SkUFixed b = SkIntToFixed(b0) + 0x2000; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 400 | |
reed@google.com | d8e0d6a | 2013-02-08 19:48:12 +0000 | [diff] [blame] | 401 | /* |
| 402 | * Our dither-cell (spatially) is |
| 403 | * 0 2 |
| 404 | * 3 1 |
| 405 | * Where |
| 406 | * [0] -> [-1/8 ... 1/8 ) values near 0 |
| 407 | * [1] -> [ 1/8 ... 3/8 ) values near 1/4 |
| 408 | * [2] -> [ 3/8 ... 5/8 ) values near 1/2 |
| 409 | * [3] -> [ 5/8 ... 7/8 ) values near 3/4 |
| 410 | */ |
| 411 | |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 412 | if (0xFF == a0 && 0 == da) { |
reed@google.com | d8e0d6a | 2013-02-08 19:48:12 +0000 | [diff] [blame] | 413 | do { |
| 414 | cache[kCache32Count*0] = SkPackARGB32(0xFF, (r + 0 ) >> 16, |
| 415 | (g + 0 ) >> 16, |
| 416 | (b + 0 ) >> 16); |
| 417 | cache[kCache32Count*1] = SkPackARGB32(0xFF, (r + 0x8000) >> 16, |
| 418 | (g + 0x8000) >> 16, |
| 419 | (b + 0x8000) >> 16); |
| 420 | cache[kCache32Count*2] = SkPackARGB32(0xFF, (r + 0xC000) >> 16, |
| 421 | (g + 0xC000) >> 16, |
| 422 | (b + 0xC000) >> 16); |
| 423 | cache[kCache32Count*3] = SkPackARGB32(0xFF, (r + 0x4000) >> 16, |
| 424 | (g + 0x4000) >> 16, |
| 425 | (b + 0x4000) >> 16); |
| 426 | cache += 1; |
| 427 | r += dr; |
| 428 | g += dg; |
| 429 | b += db; |
| 430 | } while (--count != 0); |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 431 | } else if (interpInPremul) { |
| 432 | do { |
| 433 | cache[kCache32Count*0] = SkPackARGB32((a + 0 ) >> 16, |
| 434 | (r + 0 ) >> 16, |
| 435 | (g + 0 ) >> 16, |
| 436 | (b + 0 ) >> 16); |
| 437 | cache[kCache32Count*1] = SkPackARGB32((a + 0x8000) >> 16, |
| 438 | (r + 0x8000) >> 16, |
| 439 | (g + 0x8000) >> 16, |
| 440 | (b + 0x8000) >> 16); |
| 441 | cache[kCache32Count*2] = SkPackARGB32((a + 0xC000) >> 16, |
| 442 | (r + 0xC000) >> 16, |
| 443 | (g + 0xC000) >> 16, |
| 444 | (b + 0xC000) >> 16); |
| 445 | cache[kCache32Count*3] = SkPackARGB32((a + 0x4000) >> 16, |
| 446 | (r + 0x4000) >> 16, |
| 447 | (g + 0x4000) >> 16, |
| 448 | (b + 0x4000) >> 16); |
| 449 | cache += 1; |
| 450 | a += da; |
| 451 | r += dr; |
| 452 | g += dg; |
| 453 | b += db; |
| 454 | } while (--count != 0); |
| 455 | } else { // interpolate in unpreml space |
reed@google.com | d8e0d6a | 2013-02-08 19:48:12 +0000 | [diff] [blame] | 456 | do { |
| 457 | cache[kCache32Count*0] = SkPremultiplyARGBInline((a + 0 ) >> 16, |
| 458 | (r + 0 ) >> 16, |
| 459 | (g + 0 ) >> 16, |
| 460 | (b + 0 ) >> 16); |
| 461 | cache[kCache32Count*1] = SkPremultiplyARGBInline((a + 0x8000) >> 16, |
| 462 | (r + 0x8000) >> 16, |
| 463 | (g + 0x8000) >> 16, |
| 464 | (b + 0x8000) >> 16); |
| 465 | cache[kCache32Count*2] = SkPremultiplyARGBInline((a + 0xC000) >> 16, |
| 466 | (r + 0xC000) >> 16, |
| 467 | (g + 0xC000) >> 16, |
| 468 | (b + 0xC000) >> 16); |
| 469 | cache[kCache32Count*3] = SkPremultiplyARGBInline((a + 0x4000) >> 16, |
| 470 | (r + 0x4000) >> 16, |
| 471 | (g + 0x4000) >> 16, |
| 472 | (b + 0x4000) >> 16); |
| 473 | cache += 1; |
| 474 | a += da; |
| 475 | r += dr; |
| 476 | g += dg; |
| 477 | b += db; |
| 478 | } while (--count != 0); |
| 479 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | static inline int SkFixedToFFFF(SkFixed x) { |
| 483 | SkASSERT((unsigned)x <= SK_Fixed1); |
| 484 | return x - (x >> 16); |
| 485 | } |
| 486 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 487 | const uint16_t* SkGradientShaderBase::GradientShaderCache::getCache16() { |
| 488 | SkOnce(&fCache16Inited, &fCache16Mutex, SkGradientShaderBase::GradientShaderCache::initCache16, |
| 489 | this); |
| 490 | SkASSERT(fCache16); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 491 | return fCache16; |
| 492 | } |
| 493 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 494 | void SkGradientShaderBase::GradientShaderCache::initCache16(GradientShaderCache* cache) { |
| 495 | // double the count for dither entries |
| 496 | const int entryCount = kCache16Count * 2; |
| 497 | const size_t allocSize = sizeof(uint16_t) * entryCount; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 498 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 499 | SkASSERT(NULL == cache->fCache16Storage); |
| 500 | cache->fCache16Storage = (uint16_t*)sk_malloc_throw(allocSize); |
| 501 | cache->fCache16 = cache->fCache16Storage; |
| 502 | if (cache->fShader.fColorCount == 2) { |
| 503 | Build16bitCache(cache->fCache16, cache->fShader.fOrigColors[0], |
| 504 | cache->fShader.fOrigColors[1], kCache16Count); |
| 505 | } else { |
| 506 | Rec* rec = cache->fShader.fRecs; |
| 507 | int prevIndex = 0; |
| 508 | for (int i = 1; i < cache->fShader.fColorCount; i++) { |
| 509 | int nextIndex = SkFixedToFFFF(rec[i].fPos) >> kCache16Shift; |
| 510 | SkASSERT(nextIndex < kCache16Count); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 511 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 512 | if (nextIndex > prevIndex) |
| 513 | Build16bitCache(cache->fCache16 + prevIndex, cache->fShader.fOrigColors[i-1], |
| 514 | cache->fShader.fOrigColors[i], nextIndex - prevIndex + 1); |
| 515 | prevIndex = nextIndex; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 516 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 517 | } |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | const SkPMColor* SkGradientShaderBase::GradientShaderCache::getCache32() { |
| 521 | SkOnce(&fCache32Inited, &fCache32Mutex, SkGradientShaderBase::GradientShaderCache::initCache32, |
| 522 | this); |
| 523 | SkASSERT(fCache32); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 524 | return fCache32; |
| 525 | } |
| 526 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 527 | void SkGradientShaderBase::GradientShaderCache::initCache32(GradientShaderCache* cache) { |
| 528 | SkImageInfo info; |
| 529 | info.fWidth = kCache32Count; |
| 530 | info.fHeight = 4; // for our 4 dither rows |
| 531 | info.fAlphaType = kPremul_SkAlphaType; |
| 532 | info.fColorType = kN32_SkColorType; |
| 533 | |
| 534 | SkASSERT(NULL == cache->fCache32PixelRef); |
| 535 | cache->fCache32PixelRef = SkMallocPixelRef::NewAllocate(info, 0, NULL); |
| 536 | cache->fCache32 = (SkPMColor*)cache->fCache32PixelRef->getAddr(); |
| 537 | if (cache->fShader.fColorCount == 2) { |
| 538 | Build32bitCache(cache->fCache32, cache->fShader.fOrigColors[0], |
| 539 | cache->fShader.fOrigColors[1], kCache32Count, cache->fCacheAlpha, |
| 540 | cache->fShader.fGradFlags); |
| 541 | } else { |
| 542 | Rec* rec = cache->fShader.fRecs; |
| 543 | int prevIndex = 0; |
| 544 | for (int i = 1; i < cache->fShader.fColorCount; i++) { |
| 545 | int nextIndex = SkFixedToFFFF(rec[i].fPos) >> kCache32Shift; |
| 546 | SkASSERT(nextIndex < kCache32Count); |
| 547 | |
| 548 | if (nextIndex > prevIndex) |
| 549 | Build32bitCache(cache->fCache32 + prevIndex, cache->fShader.fOrigColors[i-1], |
| 550 | cache->fShader.fOrigColors[i], nextIndex - prevIndex + 1, |
| 551 | cache->fCacheAlpha, cache->fShader.fGradFlags); |
| 552 | prevIndex = nextIndex; |
| 553 | } |
| 554 | } |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | /* |
| 558 | * The gradient holds a cache for the most recent value of alpha. Successive |
| 559 | * callers with the same alpha value will share the same cache. |
| 560 | */ |
| 561 | SkGradientShaderBase::GradientShaderCache* SkGradientShaderBase::refCache(U8CPU alpha) const { |
| 562 | SkAutoMutexAcquire ama(fCacheMutex); |
| 563 | if (!fCache || fCache->getAlpha() != alpha) { |
| 564 | fCache.reset(SkNEW_ARGS(GradientShaderCache, (alpha, *this))); |
| 565 | } |
| 566 | // Increment the ref counter inside the mutex to ensure the returned pointer is still valid. |
| 567 | // Otherwise, the pointer may have been overwritten on a different thread before the object's |
| 568 | // ref count was incremented. |
| 569 | fCache.get()->ref(); |
| 570 | return fCache; |
| 571 | } |
| 572 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 573 | /* |
| 574 | * Because our caller might rebuild the same (logically the same) gradient |
| 575 | * over and over, we'd like to return exactly the same "bitmap" if possible, |
| 576 | * allowing the client to utilize a cache of our bitmap (e.g. with a GPU). |
| 577 | * To do that, we maintain a private cache of built-bitmaps, based on our |
| 578 | * colors and positions. Note: we don't try to flatten the fMapper, so if one |
| 579 | * is present, we skip the cache for now. |
| 580 | */ |
rileya@google.com | 1c6d64b | 2012-07-27 15:49:05 +0000 | [diff] [blame] | 581 | void SkGradientShaderBase::getGradientTableBitmap(SkBitmap* bitmap) const { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 582 | // our caller assumes no external alpha, so we ensure that our cache is |
| 583 | // built with 0xFF |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 584 | SkAutoTUnref<GradientShaderCache> cache(this->refCache(0xFF)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 585 | |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 586 | // build our key: [numColors + colors[] + {positions[]} + flags ] |
| 587 | int count = 1 + fColorCount + 1; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 588 | if (fColorCount > 2) { |
| 589 | count += fColorCount - 1; // fRecs[].fPos |
| 590 | } |
| 591 | |
| 592 | SkAutoSTMalloc<16, int32_t> storage(count); |
| 593 | int32_t* buffer = storage.get(); |
| 594 | |
| 595 | *buffer++ = fColorCount; |
| 596 | memcpy(buffer, fOrigColors, fColorCount * sizeof(SkColor)); |
| 597 | buffer += fColorCount; |
| 598 | if (fColorCount > 2) { |
| 599 | for (int i = 1; i < fColorCount; i++) { |
| 600 | *buffer++ = fRecs[i].fPos; |
| 601 | } |
| 602 | } |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 603 | *buffer++ = fGradFlags; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 604 | SkASSERT(buffer - storage.get() == count); |
| 605 | |
| 606 | /////////////////////////////////// |
| 607 | |
| 608 | SK_DECLARE_STATIC_MUTEX(gMutex); |
| 609 | static SkBitmapCache* gCache; |
| 610 | // each cache cost 1K of RAM, since each bitmap will be 1x256 at 32bpp |
| 611 | static const int MAX_NUM_CACHED_GRADIENT_BITMAPS = 32; |
| 612 | SkAutoMutexAcquire ama(gMutex); |
| 613 | |
| 614 | if (NULL == gCache) { |
| 615 | gCache = SkNEW_ARGS(SkBitmapCache, (MAX_NUM_CACHED_GRADIENT_BITMAPS)); |
| 616 | } |
| 617 | size_t size = count * sizeof(int32_t); |
| 618 | |
| 619 | if (!gCache->find(storage.get(), size, bitmap)) { |
| 620 | // force our cahce32pixelref to be built |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 621 | (void)cache->getCache32(); |
commit-bot@chromium.org | e24ad23 | 2014-02-16 22:03:38 +0000 | [diff] [blame] | 622 | bitmap->setConfig(SkImageInfo::MakeN32Premul(kCache32Count, 1)); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 623 | bitmap->setPixelRef(cache->getCache32PixelRef()); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 624 | |
| 625 | gCache->add(storage.get(), size, *bitmap); |
| 626 | } |
| 627 | } |
| 628 | |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 629 | void SkGradientShaderBase::commonAsAGradient(GradientInfo* info, bool flipGrad) const { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 630 | if (info) { |
| 631 | if (info->fColorCount >= fColorCount) { |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 632 | SkColor* colorLoc; |
| 633 | Rec* recLoc; |
| 634 | if (flipGrad && (info->fColors || info->fColorOffsets)) { |
| 635 | SkAutoSTArray<8, SkColor> colorStorage(fColorCount); |
| 636 | SkAutoSTArray<8, Rec> recStorage(fColorCount); |
| 637 | colorLoc = colorStorage.get(); |
| 638 | recLoc = recStorage.get(); |
| 639 | FlipGradientColors(colorLoc, recLoc, fOrigColors, fRecs, fColorCount); |
| 640 | } else { |
| 641 | colorLoc = fOrigColors; |
| 642 | recLoc = fRecs; |
| 643 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 644 | if (info->fColors) { |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 645 | memcpy(info->fColors, colorLoc, fColorCount * sizeof(SkColor)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 646 | } |
| 647 | if (info->fColorOffsets) { |
| 648 | if (fColorCount == 2) { |
| 649 | info->fColorOffsets[0] = 0; |
| 650 | info->fColorOffsets[1] = SK_Scalar1; |
| 651 | } else if (fColorCount > 2) { |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 652 | for (int i = 0; i < fColorCount; ++i) { |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 653 | info->fColorOffsets[i] = SkFixedToScalar(recLoc[i].fPos); |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 654 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 655 | } |
| 656 | } |
| 657 | } |
| 658 | info->fColorCount = fColorCount; |
| 659 | info->fTileMode = fTileMode; |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 660 | info->fGradientFlags = fGradFlags; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 661 | } |
| 662 | } |
| 663 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 664 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 665 | void SkGradientShaderBase::toString(SkString* str) const { |
| 666 | |
| 667 | str->appendf("%d colors: ", fColorCount); |
| 668 | |
| 669 | for (int i = 0; i < fColorCount; ++i) { |
| 670 | str->appendHex(fOrigColors[i]); |
| 671 | if (i < fColorCount-1) { |
| 672 | str->append(", "); |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | if (fColorCount > 2) { |
| 677 | str->append(" points: ("); |
| 678 | for (int i = 0; i < fColorCount; ++i) { |
| 679 | str->appendScalar(SkFixedToScalar(fRecs[i].fPos)); |
| 680 | if (i < fColorCount-1) { |
| 681 | str->append(", "); |
| 682 | } |
| 683 | } |
| 684 | str->append(")"); |
| 685 | } |
| 686 | |
| 687 | static const char* gTileModeName[SkShader::kTileModeCount] = { |
| 688 | "clamp", "repeat", "mirror" |
| 689 | }; |
| 690 | |
| 691 | str->append(" "); |
| 692 | str->append(gTileModeName[fTileMode]); |
| 693 | |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 694 | this->INHERITED::toString(str); |
| 695 | } |
| 696 | #endif |
| 697 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 698 | /////////////////////////////////////////////////////////////////////////////// |
| 699 | /////////////////////////////////////////////////////////////////////////////// |
| 700 | |
| 701 | #include "SkEmptyShader.h" |
| 702 | |
| 703 | // assumes colors is SkColor* and pos is SkScalar* |
| 704 | #define EXPAND_1_COLOR(count) \ |
| 705 | SkColor tmp[2]; \ |
| 706 | do { \ |
| 707 | if (1 == count) { \ |
| 708 | tmp[0] = tmp[1] = colors[0]; \ |
| 709 | colors = tmp; \ |
| 710 | pos = NULL; \ |
| 711 | count = 2; \ |
| 712 | } \ |
| 713 | } while (0) |
| 714 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 715 | static void desc_init(SkGradientShaderBase::Descriptor* desc, |
| 716 | const SkColor colors[], |
| 717 | const SkScalar pos[], int colorCount, |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 718 | SkShader::TileMode mode, uint32_t flags) { |
commit-bot@chromium.org | 6c5aea2 | 2014-04-22 16:25:15 +0000 | [diff] [blame] | 719 | desc->fColors = colors; |
| 720 | desc->fPos = pos; |
| 721 | desc->fCount = colorCount; |
| 722 | desc->fTileMode = mode; |
commit-bot@chromium.org | 6c5aea2 | 2014-04-22 16:25:15 +0000 | [diff] [blame] | 723 | desc->fGradFlags = flags; |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 724 | } |
| 725 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 726 | SkShader* SkGradientShader::CreateLinear(const SkPoint pts[2], |
| 727 | const SkColor colors[], |
| 728 | const SkScalar pos[], int colorCount, |
| 729 | SkShader::TileMode mode, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 730 | uint32_t flags, |
| 731 | const SkMatrix* localMatrix) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 732 | if (NULL == pts || NULL == colors || colorCount < 1) { |
| 733 | return NULL; |
| 734 | } |
| 735 | EXPAND_1_COLOR(colorCount); |
| 736 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 737 | SkGradientShaderBase::Descriptor desc; |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 738 | desc_init(&desc, colors, pos, colorCount, mode, flags); |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 739 | return SkNEW_ARGS(SkLinearGradient, (pts, desc, localMatrix)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | SkShader* SkGradientShader::CreateRadial(const SkPoint& center, SkScalar radius, |
| 743 | const SkColor colors[], |
| 744 | const SkScalar pos[], int colorCount, |
| 745 | SkShader::TileMode mode, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 746 | uint32_t flags, |
| 747 | const SkMatrix* localMatrix) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 748 | if (radius <= 0 || NULL == colors || colorCount < 1) { |
| 749 | return NULL; |
| 750 | } |
| 751 | EXPAND_1_COLOR(colorCount); |
| 752 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 753 | SkGradientShaderBase::Descriptor desc; |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 754 | desc_init(&desc, colors, pos, colorCount, mode, flags); |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 755 | return SkNEW_ARGS(SkRadialGradient, (center, radius, desc, localMatrix)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | SkShader* SkGradientShader::CreateTwoPointRadial(const SkPoint& start, |
| 759 | SkScalar startRadius, |
| 760 | const SkPoint& end, |
| 761 | SkScalar endRadius, |
| 762 | const SkColor colors[], |
| 763 | const SkScalar pos[], |
| 764 | int colorCount, |
| 765 | SkShader::TileMode mode, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 766 | uint32_t flags, |
| 767 | const SkMatrix* localMatrix) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 768 | if (startRadius < 0 || endRadius < 0 || NULL == colors || colorCount < 1) { |
| 769 | return NULL; |
| 770 | } |
| 771 | EXPAND_1_COLOR(colorCount); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 772 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 773 | SkGradientShaderBase::Descriptor desc; |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 774 | desc_init(&desc, colors, pos, colorCount, mode, flags); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 775 | return SkNEW_ARGS(SkTwoPointRadialGradient, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 776 | (start, startRadius, end, endRadius, desc, localMatrix)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 777 | } |
| 778 | |
| 779 | SkShader* SkGradientShader::CreateTwoPointConical(const SkPoint& start, |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 780 | SkScalar startRadius, |
| 781 | const SkPoint& end, |
| 782 | SkScalar endRadius, |
| 783 | const SkColor colors[], |
| 784 | const SkScalar pos[], |
| 785 | int colorCount, |
| 786 | SkShader::TileMode mode, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 787 | uint32_t flags, |
| 788 | const SkMatrix* localMatrix) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 789 | if (startRadius < 0 || endRadius < 0 || NULL == colors || colorCount < 1) { |
| 790 | return NULL; |
| 791 | } |
| 792 | if (start == end && startRadius == endRadius) { |
| 793 | return SkNEW(SkEmptyShader); |
| 794 | } |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 795 | |
rileya@google.com | 1ee7c6a | 2012-07-31 16:00:13 +0000 | [diff] [blame] | 796 | EXPAND_1_COLOR(colorCount); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 797 | |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 798 | bool flipGradient = startRadius > endRadius; |
| 799 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 800 | SkGradientShaderBase::Descriptor desc; |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 801 | |
| 802 | if (!flipGradient) { |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 803 | desc_init(&desc, colors, pos, colorCount, mode, flags); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 804 | return SkNEW_ARGS(SkTwoPointConicalGradient, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 805 | (start, startRadius, end, endRadius, flipGradient, desc, localMatrix)); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 806 | } else { |
| 807 | SkAutoSTArray<8, SkColor> colorsNew(colorCount); |
| 808 | SkAutoSTArray<8, SkScalar> posNew(colorCount); |
| 809 | for (int i = 0; i < colorCount; ++i) { |
| 810 | colorsNew[i] = colors[colorCount - i - 1]; |
| 811 | } |
| 812 | |
| 813 | if (pos) { |
| 814 | for (int i = 0; i < colorCount; ++i) { |
| 815 | posNew[i] = 1 - pos[colorCount - i - 1]; |
| 816 | } |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 817 | desc_init(&desc, colorsNew.get(), posNew.get(), colorCount, mode, flags); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 818 | } else { |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 819 | desc_init(&desc, colorsNew.get(), NULL, colorCount, mode, flags); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | return SkNEW_ARGS(SkTwoPointConicalGradient, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 823 | (end, endRadius, start, startRadius, flipGradient, desc, localMatrix)); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 824 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | SkShader* SkGradientShader::CreateSweep(SkScalar cx, SkScalar cy, |
| 828 | const SkColor colors[], |
| 829 | const SkScalar pos[], |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 830 | int colorCount, |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 831 | uint32_t flags, |
| 832 | const SkMatrix* localMatrix) { |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 833 | if (NULL == colors || colorCount < 1) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 834 | return NULL; |
| 835 | } |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 836 | EXPAND_1_COLOR(colorCount); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 837 | |
reed@google.com | 437d6eb | 2013-05-23 19:03:05 +0000 | [diff] [blame] | 838 | SkGradientShaderBase::Descriptor desc; |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame^] | 839 | desc_init(&desc, colors, pos, colorCount, SkShader::kClamp_TileMode, flags); |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 840 | return SkNEW_ARGS(SkSweepGradient, (cx, cy, desc, localMatrix)); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkGradientShader) |
| 844 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLinearGradient) |
| 845 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkRadialGradient) |
| 846 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSweepGradient) |
| 847 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointRadialGradient) |
| 848 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient) |
| 849 | SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 850 | |
| 851 | /////////////////////////////////////////////////////////////////////////////// |
| 852 | |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 853 | #if SK_SUPPORT_GPU |
| 854 | |
rileya@google.com | b3e50f2 | 2012-08-20 17:43:08 +0000 | [diff] [blame] | 855 | #include "effects/GrTextureStripAtlas.h" |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 856 | #include "GrTBackendEffectFactory.h" |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 857 | #include "SkGr.h" |
| 858 | |
bsalomon@google.com | 0707c29 | 2012-10-25 21:45:42 +0000 | [diff] [blame] | 859 | GrGLGradientEffect::GrGLGradientEffect(const GrBackendEffectFactory& factory) |
rileya@google.com | b3e50f2 | 2012-08-20 17:43:08 +0000 | [diff] [blame] | 860 | : INHERITED(factory) |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 861 | , fCachedYCoord(SK_ScalarMax) { |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 862 | } |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 863 | |
bsalomon@google.com | 0707c29 | 2012-10-25 21:45:42 +0000 | [diff] [blame] | 864 | GrGLGradientEffect::~GrGLGradientEffect() { } |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 865 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 866 | void GrGLGradientEffect::emitUniforms(GrGLShaderBuilder* builder, EffectKey key) { |
| 867 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 868 | if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(key)) { // 2 Color case |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 869 | fColorStartUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 870 | kVec4f_GrSLType, "GradientStartColor"); |
| 871 | fColorEndUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 872 | kVec4f_GrSLType, "GradientEndColor"); |
skia.committer@gmail.com | 9a070f2 | 2013-09-10 07:01:44 +0000 | [diff] [blame] | 873 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 874 | } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(key)){ // 3 Color Case |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 875 | fColorStartUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 876 | kVec4f_GrSLType, "GradientStartColor"); |
| 877 | fColorMidUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 878 | kVec4f_GrSLType, "GradientMidColor"); |
| 879 | fColorEndUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 880 | kVec4f_GrSLType, "GradientEndColor"); |
| 881 | |
| 882 | } else { // if not a fast case |
| 883 | fFSYUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 884 | kFloat_GrSLType, "GradientYCoordFS"); |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | static inline void set_color_uni(const GrGLUniformManager& uman, |
| 889 | const GrGLUniformManager::UniformHandle uni, |
| 890 | const SkColor* color) { |
| 891 | uman.set4f(uni, |
| 892 | SkColorGetR(*color) / 255.f, |
| 893 | SkColorGetG(*color) / 255.f, |
| 894 | SkColorGetB(*color) / 255.f, |
| 895 | SkColorGetA(*color) / 255.f); |
| 896 | } |
| 897 | |
| 898 | static inline void set_mul_color_uni(const GrGLUniformManager& uman, |
| 899 | const GrGLUniformManager::UniformHandle uni, |
| 900 | const SkColor* color){ |
| 901 | float a = SkColorGetA(*color) / 255.f; |
| 902 | float aDiv255 = a / 255.f; |
| 903 | uman.set4f(uni, |
| 904 | SkColorGetR(*color) * aDiv255, |
| 905 | SkColorGetG(*color) * aDiv255, |
| 906 | SkColorGetB(*color) * aDiv255, |
| 907 | a); |
rileya@google.com | b3e50f2 | 2012-08-20 17:43:08 +0000 | [diff] [blame] | 908 | } |
| 909 | |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 910 | void GrGLGradientEffect::setData(const GrGLUniformManager& uman, |
| 911 | const GrDrawEffect& drawEffect) { |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 912 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 913 | const GrGradientEffect& e = drawEffect.castEffect<GrGradientEffect>(); |
| 914 | |
| 915 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 916 | if (SkGradientShaderBase::kTwo_GpuColorType == e.getColorType()){ |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 917 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 918 | if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { |
| 919 | set_mul_color_uni(uman, fColorStartUni, e.getColors(0)); |
| 920 | set_mul_color_uni(uman, fColorEndUni, e.getColors(1)); |
| 921 | } else { |
| 922 | set_color_uni(uman, fColorStartUni, e.getColors(0)); |
| 923 | set_color_uni(uman, fColorEndUni, e.getColors(1)); |
| 924 | } |
| 925 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 926 | } else if (SkGradientShaderBase::kThree_GpuColorType == e.getColorType()){ |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 927 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 928 | if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { |
| 929 | set_mul_color_uni(uman, fColorStartUni, e.getColors(0)); |
| 930 | set_mul_color_uni(uman, fColorMidUni, e.getColors(1)); |
| 931 | set_mul_color_uni(uman, fColorEndUni, e.getColors(2)); |
| 932 | } else { |
| 933 | set_color_uni(uman, fColorStartUni, e.getColors(0)); |
| 934 | set_color_uni(uman, fColorMidUni, e.getColors(1)); |
| 935 | set_color_uni(uman, fColorEndUni, e.getColors(2)); |
| 936 | } |
| 937 | } else { |
skia.committer@gmail.com | 9a070f2 | 2013-09-10 07:01:44 +0000 | [diff] [blame] | 938 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 939 | SkScalar yCoord = e.getYCoord(); |
| 940 | if (yCoord != fCachedYCoord) { |
| 941 | uman.set1f(fFSYUni, yCoord); |
| 942 | fCachedYCoord = yCoord; |
| 943 | } |
rileya@google.com | b3e50f2 | 2012-08-20 17:43:08 +0000 | [diff] [blame] | 944 | } |
| 945 | } |
| 946 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 947 | |
| 948 | GrGLEffect::EffectKey GrGLGradientEffect::GenBaseGradientKey(const GrDrawEffect& drawEffect) { |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 949 | const GrGradientEffect& e = drawEffect.castEffect<GrGradientEffect>(); |
skia.committer@gmail.com | 9a070f2 | 2013-09-10 07:01:44 +0000 | [diff] [blame] | 950 | |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 951 | EffectKey key = 0; |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 952 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 953 | if (SkGradientShaderBase::kTwo_GpuColorType == e.getColorType()) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 954 | key |= kTwoColorKey; |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 955 | } else if (SkGradientShaderBase::kThree_GpuColorType == e.getColorType()){ |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 956 | key |= kThreeColorKey; |
| 957 | } |
| 958 | |
| 959 | if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) { |
| 960 | key |= kPremulBeforeInterpKey; |
| 961 | } |
| 962 | |
| 963 | return key; |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 964 | } |
| 965 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 966 | void GrGLGradientEffect::emitColor(GrGLShaderBuilder* builder, |
| 967 | const char* gradientTValue, |
| 968 | EffectKey key, |
| 969 | const char* outputColor, |
| 970 | const char* inputColor, |
commit-bot@chromium.org | 3390b9a | 2013-10-03 15:17:58 +0000 | [diff] [blame] | 971 | const TextureSamplerArray& samplers) { |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 972 | if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(key)){ |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 973 | builder->fsCodeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1.0));\n", |
| 974 | builder->getUniformVariable(fColorStartUni).c_str(), |
| 975 | builder->getUniformVariable(fColorEndUni).c_str(), |
| 976 | gradientTValue); |
| 977 | // Note that we could skip this step if both colors are known to be opaque. Two |
| 978 | // considerations: |
| 979 | // The gradient SkShader reporting opaque is more restrictive than necessary in the two pt |
| 980 | // case. Make sure the key reflects this optimization (and note that it can use the same |
| 981 | // shader as thekBeforeIterp case). This same optimization applies to the 3 color case below. |
| 982 | if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(key)) { |
| 983 | builder->fsCodeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); |
| 984 | } |
bsalomon@google.com | 34bcb9f | 2012-08-28 18:20:18 +0000 | [diff] [blame] | 985 | |
commit-bot@chromium.org | 824c346 | 2013-10-10 06:30:18 +0000 | [diff] [blame] | 986 | builder->fsCodeAppendf("\t%s = %s;\n", outputColor, |
commit-bot@chromium.org | a34995e | 2013-10-23 05:42:03 +0000 | [diff] [blame] | 987 | (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp")).c_str()); |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 988 | } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(key)){ |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 989 | builder->fsCodeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n", |
| 990 | gradientTValue); |
commit-bot@chromium.org | 0694ea7 | 2013-09-18 13:00:28 +0000 | [diff] [blame] | 991 | builder->fsCodeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) * %s;\n", |
| 992 | builder->getUniformVariable(fColorStartUni).c_str()); |
| 993 | if (kTegra3_GrGLRenderer == builder->ctxInfo().renderer()) { |
| 994 | // The Tegra3 compiler will sometimes never return if we have |
| 995 | // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expression. |
| 996 | builder->fsCodeAppend("\tfloat minAbs = abs(oneMinus2t);\n"); |
| 997 | builder->fsCodeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n"); |
| 998 | builder->fsCodeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n", |
| 999 | builder->getUniformVariable(fColorMidUni).c_str()); |
| 1000 | } else { |
| 1001 | builder->fsCodeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1.0)) * %s;\n", |
| 1002 | builder->getUniformVariable(fColorMidUni).c_str()); |
| 1003 | } |
| 1004 | builder->fsCodeAppendf("\tcolorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s;\n", |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1005 | builder->getUniformVariable(fColorEndUni).c_str()); |
| 1006 | if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(key)) { |
| 1007 | builder->fsCodeAppend("\tcolorTemp.rgb *= colorTemp.a;\n"); |
| 1008 | } |
| 1009 | |
commit-bot@chromium.org | 824c346 | 2013-10-10 06:30:18 +0000 | [diff] [blame] | 1010 | builder->fsCodeAppendf("\t%s = %s;\n", outputColor, |
commit-bot@chromium.org | a34995e | 2013-10-23 05:42:03 +0000 | [diff] [blame] | 1011 | (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp")).c_str()); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1012 | } else { |
| 1013 | builder->fsCodeAppendf("\tvec2 coord = vec2(%s, %s);\n", |
| 1014 | gradientTValue, |
| 1015 | builder->getUniformVariable(fFSYUni).c_str()); |
| 1016 | builder->fsCodeAppendf("\t%s = ", outputColor); |
| 1017 | builder->fsAppendTextureLookupAndModulate(inputColor, |
| 1018 | samplers[0], |
| 1019 | "coord"); |
| 1020 | builder->fsCodeAppend(";\n"); |
| 1021 | } |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | ///////////////////////////////////////////////////////////////////// |
| 1025 | |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 1026 | GrGradientEffect::GrGradientEffect(GrContext* ctx, |
rileya@google.com | 1c6d64b | 2012-07-27 15:49:05 +0000 | [diff] [blame] | 1027 | const SkGradientShaderBase& shader, |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 1028 | const SkMatrix& matrix, |
bsalomon@google.com | 50db75c | 2013-01-11 13:54:30 +0000 | [diff] [blame] | 1029 | SkShader::TileMode tileMode) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1030 | |
bsalomon@google.com | 371e105 | 2013-01-11 21:08:55 +0000 | [diff] [blame] | 1031 | fIsOpaque = shader.isOpaque(); |
| 1032 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 1033 | fColorType = shader.getGpuColorType(&fColors[0]); |
bsalomon@google.com | 1ce49fc | 2012-09-18 14:14:49 +0000 | [diff] [blame] | 1034 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1035 | // The two and three color specializations do not currently support tiling. |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 1036 | if (SkGradientShaderBase::kTwo_GpuColorType == fColorType || |
| 1037 | SkGradientShaderBase::kThree_GpuColorType == fColorType) { |
| 1038 | fRow = -1; |
skia.committer@gmail.com | 8a777a5 | 2014-04-19 03:04:56 +0000 | [diff] [blame] | 1039 | |
commit-bot@chromium.org | 6c5aea2 | 2014-04-22 16:25:15 +0000 | [diff] [blame] | 1040 | if (SkGradientShader::kInterpolateColorsInPremul_Flag & shader.getGradFlags()) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1041 | fPremulType = kBeforeInterp_PremulType; |
| 1042 | } else { |
| 1043 | fPremulType = kAfterInterp_PremulType; |
| 1044 | } |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 1045 | fCoordTransform.reset(kCoordSet, matrix); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1046 | } else { |
| 1047 | // doesn't matter how this is set, just be consistent because it is part of the effect key. |
| 1048 | fPremulType = kBeforeInterp_PremulType; |
| 1049 | SkBitmap bitmap; |
| 1050 | shader.getGradientTableBitmap(&bitmap); |
skia.committer@gmail.com | 9a070f2 | 2013-09-10 07:01:44 +0000 | [diff] [blame] | 1051 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1052 | GrTextureStripAtlas::Desc desc; |
| 1053 | desc.fWidth = bitmap.width(); |
| 1054 | desc.fHeight = 32; |
| 1055 | desc.fRowHeight = bitmap.height(); |
| 1056 | desc.fContext = ctx; |
commit-bot@chromium.org | 3adcc34 | 2014-04-23 19:18:09 +0000 | [diff] [blame] | 1057 | desc.fConfig = SkImageInfo2GrPixelConfig(bitmap.info()); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1058 | fAtlas = GrTextureStripAtlas::GetAtlas(desc); |
| 1059 | SkASSERT(NULL != fAtlas); |
| 1060 | |
| 1061 | // We always filter the gradient table. Each table is one row of a texture, always y-clamp. |
| 1062 | GrTextureParams params; |
| 1063 | params.setFilterMode(GrTextureParams::kBilerp_FilterMode); |
| 1064 | params.setTileModeX(tileMode); |
| 1065 | |
| 1066 | fRow = fAtlas->lockRow(bitmap); |
| 1067 | if (-1 != fRow) { |
| 1068 | fYCoord = fAtlas->getYOffset(fRow) + SK_ScalarHalf * |
| 1069 | fAtlas->getVerticalScaleFactor(); |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 1070 | fCoordTransform.reset(kCoordSet, matrix, fAtlas->getTexture()); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1071 | fTextureAccess.reset(fAtlas->getTexture(), params); |
| 1072 | } else { |
| 1073 | GrTexture* texture = GrLockAndRefCachedBitmapTexture(ctx, bitmap, ¶ms); |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 1074 | fCoordTransform.reset(kCoordSet, matrix, texture); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1075 | fTextureAccess.reset(texture, params); |
| 1076 | fYCoord = SK_ScalarHalf; |
| 1077 | |
| 1078 | // Unlock immediately, this is not great, but we don't have a way of |
| 1079 | // knowing when else to unlock it currently, so it may get purged from |
| 1080 | // the cache, but it'll still be ref'd until it's no longer being used. |
| 1081 | GrUnlockAndUnrefCachedBitmapTexture(texture); |
| 1082 | } |
| 1083 | this->addTextureAccess(&fTextureAccess); |
| 1084 | } |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 1085 | this->addCoordTransform(&fCoordTransform); |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 1086 | } |
| 1087 | |
| 1088 | GrGradientEffect::~GrGradientEffect() { |
rileya@google.com | b3e50f2 | 2012-08-20 17:43:08 +0000 | [diff] [blame] | 1089 | if (this->useAtlas()) { |
| 1090 | fAtlas->unlockRow(fRow); |
rileya@google.com | b3e50f2 | 2012-08-20 17:43:08 +0000 | [diff] [blame] | 1091 | } |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 1092 | } |
| 1093 | |
bsalomon@google.com | 8a252f7 | 2013-01-22 20:35:13 +0000 | [diff] [blame] | 1094 | bool GrGradientEffect::onIsEqual(const GrEffect& effect) const { |
bsalomon@google.com | 6340a41 | 2013-01-22 19:55:59 +0000 | [diff] [blame] | 1095 | const GrGradientEffect& s = CastEffect<GrGradientEffect>(effect); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1096 | |
| 1097 | if (this->fColorType == s.getColorType()){ |
| 1098 | |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 1099 | if (SkGradientShaderBase::kTwo_GpuColorType == fColorType) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1100 | if (*this->getColors(0) != *s.getColors(0) || |
| 1101 | *this->getColors(1) != *s.getColors(1)) { |
| 1102 | return false; |
| 1103 | } |
commit-bot@chromium.org | 996402b | 2014-04-18 14:42:11 +0000 | [diff] [blame] | 1104 | } else if (SkGradientShaderBase::kThree_GpuColorType == fColorType) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1105 | if (*this->getColors(0) != *s.getColors(0) || |
| 1106 | *this->getColors(1) != *s.getColors(1) || |
| 1107 | *this->getColors(2) != *s.getColors(2)) { |
| 1108 | return false; |
| 1109 | } |
robertphillips@google.com | c0de5d6 | 2013-10-08 19:15:58 +0000 | [diff] [blame] | 1110 | } else { |
| 1111 | if (fYCoord != s.getYCoord()) { |
| 1112 | return false; |
| 1113 | } |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1114 | } |
skia.committer@gmail.com | 9a070f2 | 2013-09-10 07:01:44 +0000 | [diff] [blame] | 1115 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1116 | return fTextureAccess.getTexture() == s.fTextureAccess.getTexture() && |
| 1117 | fTextureAccess.getParams().getTileModeX() == |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 1118 | s.fTextureAccess.getParams().getTileModeX() && |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1119 | this->useAtlas() == s.useAtlas() && |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 1120 | fCoordTransform.getMatrix().cheapEqualTo(s.fCoordTransform.getMatrix()); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | return false; |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 1124 | } |
| 1125 | |
| 1126 | void GrGradientEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const { |
bsalomon@google.com | b8eb2e8 | 2013-03-28 13:46:42 +0000 | [diff] [blame] | 1127 | if (fIsOpaque && (kA_GrColorComponentFlag & *validFlags) && 0xff == GrColorUnpackA(*color)) { |
| 1128 | *validFlags = kA_GrColorComponentFlag; |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 1129 | } else { |
| 1130 | *validFlags = 0; |
| 1131 | } |
| 1132 | } |
| 1133 | |
commit-bot@chromium.org | e0e7cfe | 2013-09-09 20:09:12 +0000 | [diff] [blame] | 1134 | int GrGradientEffect::RandomGradientParams(SkRandom* random, |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 1135 | SkColor colors[], |
| 1136 | SkScalar** stops, |
| 1137 | SkShader::TileMode* tm) { |
| 1138 | int outColors = random->nextRangeU(1, kMaxRandomGradientColors); |
| 1139 | |
| 1140 | // if one color, omit stops, otherwise randomly decide whether or not to |
| 1141 | if (outColors == 1 || (outColors >= 2 && random->nextBool())) { |
| 1142 | *stops = NULL; |
| 1143 | } |
| 1144 | |
bsalomon@google.com | 8171288 | 2012-11-01 17:12:34 +0000 | [diff] [blame] | 1145 | SkScalar stop = 0.f; |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 1146 | for (int i = 0; i < outColors; ++i) { |
| 1147 | colors[i] = random->nextU(); |
| 1148 | if (NULL != *stops) { |
| 1149 | (*stops)[i] = stop; |
| 1150 | stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f; |
| 1151 | } |
| 1152 | } |
| 1153 | *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount)); |
| 1154 | |
| 1155 | return outColors; |
| 1156 | } |
| 1157 | |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 1158 | #endif |