joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Google Inc. |
| 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 "GrAtlasTextBlob.h" |
| 9 | |
| 10 | #include "GrBatchFlushState.h" |
joshualitt | 8e84a1e | 2016-02-16 11:09:25 -0800 | [diff] [blame] | 11 | #include "GrTextUtils.h" |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 12 | |
| 13 | #include "SkDistanceFieldGen.h" |
| 14 | #include "SkGlyphCache.h" |
| 15 | |
| 16 | #include "batches/GrAtlasTextBatch.h" |
| 17 | |
| 18 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
| 19 | // A large template to handle regenerating the vertices of a textblob with as few branches as |
| 20 | // possible |
| 21 | template <bool regenPos, bool regenCol, bool regenTexCoords> |
| 22 | inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexStride, |
| 23 | bool useDistanceFields, SkScalar transX, SkScalar transY, |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 24 | int32_t log2Width, int32_t log2Height, |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 25 | GrColor color) { |
| 26 | int u0, v0, u1, v1; |
| 27 | if (regenTexCoords) { |
| 28 | SkASSERT(glyph); |
| 29 | int width = glyph->fBounds.width(); |
| 30 | int height = glyph->fBounds.height(); |
| 31 | |
| 32 | if (useDistanceFields) { |
| 33 | u0 = glyph->fAtlasLocation.fX + SK_DistanceFieldInset; |
| 34 | v0 = glyph->fAtlasLocation.fY + SK_DistanceFieldInset; |
| 35 | u1 = u0 + width - 2 * SK_DistanceFieldInset; |
| 36 | v1 = v0 + height - 2 * SK_DistanceFieldInset; |
| 37 | } else { |
| 38 | u0 = glyph->fAtlasLocation.fX; |
| 39 | v0 = glyph->fAtlasLocation.fY; |
| 40 | u1 = u0 + width; |
| 41 | v1 = v0 + height; |
| 42 | } |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 43 | |
| 44 | // normalize |
| 45 | u0 *= 65535; |
| 46 | u0 >>= log2Width; |
| 47 | u1 *= 65535; |
| 48 | u1 >>= log2Width; |
| 49 | v0 *= 65535; |
| 50 | v0 >>= log2Height; |
| 51 | v1 *= 65535; |
| 52 | v1 >>= log2Height; |
| 53 | SkASSERT(u0 >= 0 && u0 <= 65535); |
| 54 | SkASSERT(u1 >= 0 && u1 <= 65535); |
| 55 | SkASSERT(v0 >= 0 && v0 <= 65535); |
| 56 | SkASSERT(v1 >= 0 && v1 <= 65535); |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | // This is a bit wonky, but sometimes we have LCD text, in which case we won't have color |
| 60 | // vertices, hence vertexStride - sizeof(SkIPoint16) |
| 61 | intptr_t colorOffset = sizeof(SkPoint); |
| 62 | intptr_t texCoordOffset = vertexStride - sizeof(SkIPoint16); |
| 63 | |
| 64 | // V0 |
| 65 | if (regenPos) { |
| 66 | SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| 67 | point->fX += transX; |
| 68 | point->fY += transY; |
| 69 | } |
| 70 | |
| 71 | if (regenCol) { |
| 72 | SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| 73 | *vcolor = color; |
| 74 | } |
| 75 | |
| 76 | if (regenTexCoords) { |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 77 | uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| 78 | textureCoords[0] = (uint16_t) u0; |
| 79 | textureCoords[1] = (uint16_t) v0; |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 80 | } |
| 81 | vertex += vertexStride; |
| 82 | |
| 83 | // V1 |
| 84 | if (regenPos) { |
| 85 | SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| 86 | point->fX += transX; |
| 87 | point->fY += transY; |
| 88 | } |
| 89 | |
| 90 | if (regenCol) { |
| 91 | SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| 92 | *vcolor = color; |
| 93 | } |
| 94 | |
| 95 | if (regenTexCoords) { |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 96 | uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| 97 | textureCoords[0] = (uint16_t)u0; |
| 98 | textureCoords[1] = (uint16_t)v1; |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 99 | } |
| 100 | vertex += vertexStride; |
| 101 | |
| 102 | // V2 |
| 103 | if (regenPos) { |
| 104 | SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| 105 | point->fX += transX; |
| 106 | point->fY += transY; |
| 107 | } |
| 108 | |
| 109 | if (regenCol) { |
| 110 | SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| 111 | *vcolor = color; |
| 112 | } |
| 113 | |
| 114 | if (regenTexCoords) { |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 115 | uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| 116 | textureCoords[0] = (uint16_t)u1; |
| 117 | textureCoords[1] = (uint16_t)v1; |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 118 | } |
| 119 | vertex += vertexStride; |
| 120 | |
| 121 | // V3 |
| 122 | if (regenPos) { |
| 123 | SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| 124 | point->fX += transX; |
| 125 | point->fY += transY; |
| 126 | } |
| 127 | |
| 128 | if (regenCol) { |
| 129 | SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| 130 | *vcolor = color; |
| 131 | } |
| 132 | |
| 133 | if (regenTexCoords) { |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 134 | uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| 135 | textureCoords[0] = (uint16_t)u1; |
| 136 | textureCoords[1] = (uint16_t)v0; |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 137 | } |
| 138 | } |
| 139 | |
| 140 | template <bool regenPos, bool regenCol, bool regenTexCoords, bool regenGlyphs> |
| 141 | void GrAtlasTextBlob::regenInBatch(GrDrawBatch::Target* target, |
| 142 | GrBatchFontCache* fontCache, |
| 143 | GrBlobRegenHelper *helper, |
| 144 | Run* run, |
| 145 | Run::SubRunInfo* info, SkGlyphCache** cache, |
| 146 | SkTypeface** typeface, GrFontScaler** scaler, |
| 147 | const SkDescriptor** desc, |
| 148 | int glyphCount, size_t vertexStride, |
| 149 | GrColor color, SkScalar transX, |
| 150 | SkScalar transY) const { |
| 151 | static_assert(!regenGlyphs || regenTexCoords, "must regenTexCoords along regenGlyphs"); |
| 152 | GrBatchTextStrike* strike = nullptr; |
| 153 | if (regenTexCoords) { |
| 154 | info->resetBulkUseToken(); |
| 155 | |
| 156 | // We can reuse if we have a valid strike and our descriptors / typeface are the |
| 157 | // same. The override descriptor is only for the non distance field text within |
| 158 | // a run |
| 159 | const SkDescriptor* newDesc = (run->fOverrideDescriptor && !info->drawAsDistanceFields()) ? |
| 160 | run->fOverrideDescriptor->getDesc() : |
| 161 | run->fDescriptor.getDesc(); |
| 162 | if (!*cache || !SkTypeface::Equal(*typeface, run->fTypeface) || |
| 163 | !((*desc)->equals(*newDesc))) { |
| 164 | if (*cache) { |
| 165 | SkGlyphCache::AttachCache(*cache); |
| 166 | } |
| 167 | *desc = newDesc; |
| 168 | *cache = SkGlyphCache::DetachCache(run->fTypeface, *desc); |
joshualitt | 8e84a1e | 2016-02-16 11:09:25 -0800 | [diff] [blame] | 169 | *scaler = GrTextUtils::GetGrFontScaler(*cache); |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 170 | *typeface = run->fTypeface; |
| 171 | } |
| 172 | |
| 173 | if (regenGlyphs) { |
| 174 | strike = fontCache->getStrike(*scaler); |
| 175 | } else { |
| 176 | strike = info->strike(); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | bool brokenRun = false; |
| 181 | for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) { |
| 182 | GrGlyph* glyph = nullptr; |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 183 | int log2Width = 0, log2Height = 0; |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 184 | if (regenTexCoords) { |
| 185 | size_t glyphOffset = glyphIdx + info->glyphStartIndex(); |
| 186 | |
| 187 | if (regenGlyphs) { |
| 188 | // Get the id from the old glyph, and use the new strike to lookup |
| 189 | // the glyph. |
| 190 | GrGlyph::PackedID id = fGlyphs[glyphOffset]->fPackedID; |
| 191 | fGlyphs[glyphOffset] = strike->getGlyph(id, info->maskFormat(), *scaler); |
| 192 | SkASSERT(id == fGlyphs[glyphOffset]->fPackedID); |
| 193 | } |
| 194 | glyph = fGlyphs[glyphOffset]; |
| 195 | SkASSERT(glyph && glyph->fMaskFormat == info->maskFormat()); |
| 196 | |
| 197 | if (!fontCache->hasGlyph(glyph) && |
| 198 | !strike->addGlyphToAtlas(target, glyph, *scaler, info->maskFormat())) { |
| 199 | helper->flush(); |
| 200 | brokenRun = glyphIdx > 0; |
| 201 | |
| 202 | SkDEBUGCODE(bool success =) strike->addGlyphToAtlas(target, |
| 203 | glyph, |
| 204 | *scaler, |
| 205 | info->maskFormat()); |
| 206 | SkASSERT(success); |
| 207 | } |
| 208 | fontCache->addGlyphToBulkAndSetUseToken(info->bulkUseToken(), glyph, |
bsalomon | 342bfc2 | 2016-04-01 06:06:20 -0700 | [diff] [blame^] | 209 | target->nextDrawToken()); |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 210 | log2Width = fontCache->log2Width(info->maskFormat()); |
| 211 | log2Height = fontCache->log2Height(info->maskFormat()); |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | intptr_t vertex = reinterpret_cast<intptr_t>(fVertices); |
| 215 | vertex += info->vertexStartIndex(); |
| 216 | vertex += vertexStride * glyphIdx * GrAtlasTextBatch::kVerticesPerGlyph; |
| 217 | regen_vertices<regenPos, regenCol, regenTexCoords>(vertex, glyph, vertexStride, |
| 218 | info->drawAsDistanceFields(), transX, |
jvanverth | 7023a00 | 2016-02-22 11:25:32 -0800 | [diff] [blame] | 219 | transY, log2Width, log2Height, color); |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 220 | helper->incGlyphCount(); |
| 221 | } |
| 222 | |
| 223 | // We may have changed the color so update it here |
| 224 | info->setColor(color); |
| 225 | if (regenTexCoords) { |
| 226 | if (regenGlyphs) { |
| 227 | info->setStrike(strike); |
| 228 | } |
| 229 | info->setAtlasGeneration(brokenRun ? GrBatchAtlas::kInvalidAtlasGeneration : |
| 230 | fontCache->atlasGeneration(info->maskFormat())); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | enum RegenMask { |
| 235 | kNoRegen = 0x0, |
| 236 | kRegenPos = 0x1, |
| 237 | kRegenCol = 0x2, |
| 238 | kRegenTex = 0x4, |
| 239 | kRegenGlyph = 0x8 | kRegenTex, // we have to regenerate the texture coords when we regen glyphs |
| 240 | |
| 241 | // combinations |
| 242 | kRegenPosCol = kRegenPos | kRegenCol, |
| 243 | kRegenPosTex = kRegenPos | kRegenTex, |
| 244 | kRegenPosTexGlyph = kRegenPos | kRegenGlyph, |
| 245 | kRegenPosColTex = kRegenPos | kRegenCol | kRegenTex, |
| 246 | kRegenPosColTexGlyph = kRegenPos | kRegenCol | kRegenGlyph, |
| 247 | kRegenColTex = kRegenCol | kRegenTex, |
| 248 | kRegenColTexGlyph = kRegenCol | kRegenGlyph, |
| 249 | }; |
| 250 | |
| 251 | #define REGEN_ARGS target, fontCache, helper, &run, &info, cache, typeface, scaler, desc, \ |
| 252 | *glyphCount, vertexStride, color, transX, transY |
| 253 | |
| 254 | void GrAtlasTextBlob::regenInBatch(GrDrawBatch::Target* target, |
| 255 | GrBatchFontCache* fontCache, |
| 256 | GrBlobRegenHelper *helper, |
| 257 | int runIndex, int subRunIndex, SkGlyphCache** cache, |
| 258 | SkTypeface** typeface, GrFontScaler** scaler, |
| 259 | const SkDescriptor** desc, size_t vertexStride, |
joshualitt | 8e0ef29 | 2016-02-19 14:13:03 -0800 | [diff] [blame] | 260 | const SkMatrix& viewMatrix, SkScalar x, SkScalar y, |
| 261 | GrColor color, |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 262 | void** vertices, size_t* byteCount, int* glyphCount) { |
| 263 | Run& run = fRuns[runIndex]; |
| 264 | Run::SubRunInfo& info = run.fSubRunInfo[subRunIndex]; |
| 265 | |
| 266 | uint64_t currentAtlasGen = fontCache->atlasGeneration(info.maskFormat()); |
| 267 | |
joshualitt | 8e0ef29 | 2016-02-19 14:13:03 -0800 | [diff] [blame] | 268 | // Compute translation if any |
| 269 | SkScalar transX, transY; |
| 270 | info.computeTranslation(viewMatrix, x, y, &transX, &transY); |
| 271 | |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 272 | // Because the GrBatchFontCache may evict the strike a blob depends on using for |
| 273 | // generating its texture coords, we have to track whether or not the strike has |
| 274 | // been abandoned. If it hasn't been abandoned, then we can use the GrGlyph*s as is |
| 275 | // otherwise we have to get the new strike, and use that to get the correct glyphs. |
| 276 | // Because we do not have the packed ids, and thus can't look up our glyphs in the |
| 277 | // new strike, we instead keep our ref to the old strike and use the packed ids from |
| 278 | // it. These ids will still be valid as long as we hold the ref. When we are done |
| 279 | // updating our cache of the GrGlyph*s, we drop our ref on the old strike |
| 280 | bool regenerateGlyphs = info.strike()->isAbandoned(); |
| 281 | bool regenerateTextureCoords = info.atlasGeneration() != currentAtlasGen || |
| 282 | regenerateGlyphs; |
| 283 | bool regenerateColors = kARGB_GrMaskFormat != info.maskFormat() && |
| 284 | info.color() != color; |
| 285 | bool regeneratePositions = transX != 0.f || transY != 0.f; |
| 286 | *glyphCount = info.glyphCount(); |
| 287 | |
| 288 | uint32_t regenMaskBits = kNoRegen; |
| 289 | regenMaskBits |= regeneratePositions ? kRegenPos : 0; |
| 290 | regenMaskBits |= regenerateColors ? kRegenCol : 0; |
| 291 | regenMaskBits |= regenerateTextureCoords ? kRegenTex : 0; |
| 292 | regenMaskBits |= regenerateGlyphs ? kRegenGlyph : 0; |
| 293 | RegenMask regenMask = (RegenMask)regenMaskBits; |
| 294 | |
| 295 | switch (regenMask) { |
| 296 | case kRegenPos: this->regenInBatch<true, false, false, false>(REGEN_ARGS); break; |
| 297 | case kRegenCol: this->regenInBatch<false, true, false, false>(REGEN_ARGS); break; |
| 298 | case kRegenTex: this->regenInBatch<false, false, true, false>(REGEN_ARGS); break; |
| 299 | case kRegenGlyph: this->regenInBatch<false, false, true, true>(REGEN_ARGS); break; |
| 300 | |
| 301 | // combinations |
| 302 | case kRegenPosCol: this->regenInBatch<true, true, false, false>(REGEN_ARGS); break; |
| 303 | case kRegenPosTex: this->regenInBatch<true, false, true, false>(REGEN_ARGS); break; |
| 304 | case kRegenPosTexGlyph: this->regenInBatch<true, false, true, true>(REGEN_ARGS); break; |
| 305 | case kRegenPosColTex: this->regenInBatch<true, true, true, false>(REGEN_ARGS); break; |
| 306 | case kRegenPosColTexGlyph: this->regenInBatch<true, true, true, true>(REGEN_ARGS); break; |
| 307 | case kRegenColTex: this->regenInBatch<false, true, true, false>(REGEN_ARGS); break; |
| 308 | case kRegenColTexGlyph: this->regenInBatch<false, true, true, true>(REGEN_ARGS); break; |
| 309 | case kNoRegen: |
| 310 | helper->incGlyphCount(*glyphCount); |
| 311 | |
| 312 | // set use tokens for all of the glyphs in our subrun. This is only valid if we |
| 313 | // have a valid atlas generation |
bsalomon | 342bfc2 | 2016-04-01 06:06:20 -0700 | [diff] [blame^] | 314 | fontCache->setUseTokenBulk(*info.bulkUseToken(), target->nextDrawToken(), |
joshualitt | ddd22d8 | 2016-02-16 06:47:52 -0800 | [diff] [blame] | 315 | info.maskFormat()); |
| 316 | break; |
| 317 | } |
| 318 | |
| 319 | *byteCount = info.byteCount(); |
| 320 | *vertices = fVertices + info.vertexStartIndex(); |
| 321 | } |