Move all text stuff to its own folder

BUG=skia:

Review URL: https://codereview.chromium.org/1521453002

1 files changed, 58 insertions, 0 deletions

diff --git a/src/gpu/text/GrTextBlobCache.cpp b/src/gpu/text/GrTextBlobCache.cpp
new file mode 100644
index 0000000000..f11b7c60cb
--- /dev/null
+++ b/src/gpu/text/GrTextBlobCache.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrTextBlobCache.h"
+
+static const int kVerticesPerGlyph = 4;
+
+GrTextBlobCache::~GrTextBlobCache() {
+    this->freeAll();
+}
+
+GrAtlasTextBlob* GrTextBlobCache::createBlob(int glyphCount, int runCount, size_t maxVASize) {
+    // We allocate size for the GrAtlasTextBlob itself, plus size for the vertices array,
+    // and size for the glyphIds array.
+    size_t verticesCount = glyphCount * kVerticesPerGlyph * maxVASize;
+    size_t size = sizeof(GrAtlasTextBlob) +
+                  verticesCount +
+                  glyphCount * sizeof(GrGlyph**) +
+                  sizeof(GrAtlasTextBlob::Run) * runCount;
+
+    void* allocation = fPool.allocate(size);
+#ifdef CACHE_SANITY_CHECK
+    sk_bzero(allocation, size);
+#endif
+
+    GrAtlasTextBlob* cacheBlob = new (allocation) GrAtlasTextBlob;
+#ifdef CACHE_SANITY_CHECK
+    cacheBlob->fSize = size;
+#endif
+
+    // setup offsets for vertices / glyphs
+    cacheBlob->fVertices = sizeof(GrAtlasTextBlob) + reinterpret_cast<unsigned char*>(cacheBlob);
+    cacheBlob->fGlyphs = reinterpret_cast<GrGlyph**>(cacheBlob->fVertices + verticesCount);
+    cacheBlob->fRuns = reinterpret_cast<GrAtlasTextBlob::Run*>(cacheBlob->fGlyphs + glyphCount);
+
+    // Initialize runs
+    for (int i = 0; i < runCount; i++) {
+        new (&cacheBlob->fRuns[i]) GrAtlasTextBlob::Run;
+    }
+    cacheBlob->fRunCount = runCount;
+    cacheBlob->fPool = &fPool;
+    return cacheBlob;
+}
+
+void GrTextBlobCache::freeAll() {
+    SkTDynamicHash<GrAtlasTextBlob, GrAtlasTextBlob::Key>::Iter iter(&fCache);
+    while (!iter.done()) {
+        GrAtlasTextBlob* blob = &(*iter);
+        fBlobList.remove(blob);
+        blob->unref();
+        ++iter;
+    }
+    fCache.rewind();
+}