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| 1 /* |
| 2 * Copyright 2015 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 "GrTextBlobCache.h" |
| 9 |
| 10 static const int kVerticesPerGlyph = 4; |
| 11 |
| 12 GrTextBlobCache::~GrTextBlobCache() { |
| 13 SkTDynamicHash<BitmapTextBlob, uint32_t>::Iter iter(&fCache); |
| 14 while (!iter.done()) { |
| 15 (&(*iter))->unref(); |
| 16 ++iter; |
| 17 } |
| 18 } |
| 19 |
| 20 GrAtlasTextContext::BitmapTextBlob* GrTextBlobCache::createBlob(int glyphCount,
int runCount, |
| 21 size_t maxVASize
) { |
| 22 // We allocate size for the BitmapTextBlob itself, plus size for the vertice
s array, |
| 23 // and size for the glyphIds array. |
| 24 size_t verticesCount = glyphCount * kVerticesPerGlyph * maxVASize; |
| 25 size_t size = sizeof(BitmapTextBlob) + |
| 26 verticesCount + |
| 27 glyphCount * sizeof(GrGlyph::PackedID) + |
| 28 sizeof(BitmapTextBlob::Run) * runCount; |
| 29 |
| 30 BitmapTextBlob* cacheBlob = SkNEW_PLACEMENT(fPool.allocate(size), BitmapText
Blob); |
| 31 |
| 32 // setup offsets for vertices / glyphs |
| 33 cacheBlob->fVertices = sizeof(BitmapTextBlob) + reinterpret_cast<unsigned ch
ar*>(cacheBlob); |
| 34 cacheBlob->fGlyphIDs = |
| 35 reinterpret_cast<GrGlyph::PackedID*>(cacheBlob->fVertices + vertices
Count); |
| 36 cacheBlob->fRuns = reinterpret_cast<BitmapTextBlob::Run*>(cacheBlob->fGlyphI
Ds + glyphCount); |
| 37 |
| 38 // Initialize runs |
| 39 for (int i = 0; i < runCount; i++) { |
| 40 SkNEW_PLACEMENT(&cacheBlob->fRuns[i], BitmapTextBlob::Run); |
| 41 } |
| 42 cacheBlob->fRunCount = runCount; |
| 43 cacheBlob->fPool = &fPool; |
| 44 return cacheBlob; |
| 45 } |
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