From d38f137e9b813f8193675ebd3dfbfe8bc42639e9 Mon Sep 17 00:00:00 2001
From: "bsalomon@google.com"
 <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81>
Date: Wed, 12 Oct 2011 19:53:16 +0000
Subject: Move gpu/include/* to include/gpu and gpu/src/* to src/gpu Review
 URL: http://codereview.appspot.com/5250070/

git-svn-id: http://skia.googlecode.com/svn/trunk@2471 2bbb7eff-a529-9590-31e7-b0007b416f81
---
 src/gpu/GrTextStrike.cpp | 205 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 src/gpu/GrTextStrike.cpp

(limited to 'src/gpu/GrTextStrike.cpp')

diff --git a/src/gpu/GrTextStrike.cpp b/src/gpu/GrTextStrike.cpp
new file mode 100644
index 0000000000..b8762adc11
--- /dev/null
+++ b/src/gpu/GrTextStrike.cpp
@@ -0,0 +1,205 @@
+
+/*
+ * Copyright 2010 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+
+#include "GrAtlas.h"
+#include "GrGpu.h"
+#include "GrRectanizer.h"
+#include "GrTextStrike.h"
+#include "GrTextStrike_impl.h"
+#include "GrRect.h"
+
+GrFontCache::GrFontCache(GrGpu* gpu) : fGpu(gpu) {
+    gpu->ref();
+    fAtlasMgr = NULL;
+
+    fHead = fTail = NULL;
+}
+
+GrFontCache::~GrFontCache() {
+    fCache.deleteAll();
+    delete fAtlasMgr;
+    fGpu->unref();
+}
+
+GrTextStrike* GrFontCache::generateStrike(GrFontScaler* scaler,
+                                          const Key& key) {
+    if (NULL == fAtlasMgr) {
+        fAtlasMgr = new GrAtlasMgr(fGpu);
+    }
+    GrTextStrike* strike = new GrTextStrike(this, scaler->getKey(),
+                                            scaler->getMaskFormat(), fAtlasMgr);
+    fCache.insert(key, strike);
+
+    if (fHead) {
+        fHead->fPrev = strike;
+    } else {
+        GrAssert(NULL == fTail);
+        fTail = strike;
+    }
+    strike->fPrev = NULL;
+    strike->fNext = fHead;
+    fHead = strike;
+
+    return strike;
+}
+
+void GrFontCache::freeAll() {
+    fCache.deleteAll();
+    delete fAtlasMgr;
+    fAtlasMgr = NULL;
+    fHead = NULL;
+    fTail = NULL;
+}
+
+void GrFontCache::purgeExceptFor(GrTextStrike* preserveStrike) {
+    GrTextStrike* strike = fTail;
+    while (strike) {
+        if (strike == preserveStrike) {
+            strike = strike->fPrev;
+            continue;
+        }
+        GrTextStrike* strikeToPurge = strike;
+        // keep going if we won't free up any atlases with this strike.
+        strike = (NULL == strikeToPurge->fAtlas) ? strikeToPurge->fPrev : NULL;
+        int index = fCache.slowFindIndex(strikeToPurge);
+        GrAssert(index >= 0);
+        fCache.removeAt(index, strikeToPurge->fFontScalerKey->getHash());
+        this->detachStrikeFromList(strikeToPurge);
+        delete strikeToPurge;
+    }
+}
+
+#if GR_DEBUG
+void GrFontCache::validate() const {
+    int count = fCache.count();
+    if (0 == count) {
+        GrAssert(!fHead);
+        GrAssert(!fTail);
+    } else if (1 == count) {
+        GrAssert(fHead == fTail);
+    } else {
+        GrAssert(fHead != fTail);
+    }
+
+    int count2 = 0;
+    const GrTextStrike* strike = fHead;
+    while (strike) {
+        count2 += 1;
+        strike = strike->fNext;
+    }
+    GrAssert(count == count2);
+
+    count2 = 0;
+    strike = fTail;
+    while (strike) {
+        count2 += 1;
+        strike = strike->fPrev;
+    }
+    GrAssert(count == count2);
+}
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+
+#if GR_DEBUG
+    static int gCounter;
+#endif
+
+/*
+    The text strike is specific to a given font/style/matrix setup, which is
+    represented by the GrHostFontScaler object we are given in getGlyph().
+
+    We map a 32bit glyphID to a GrGlyph record, which in turn points to a
+    atlas and a position within that texture.
+ */
+
+GrTextStrike::GrTextStrike(GrFontCache* cache, const GrKey* key,
+                           GrMaskFormat format,
+                           GrAtlasMgr* atlasMgr) : fPool(64) {
+    fFontScalerKey = key;
+    fFontScalerKey->ref();
+
+    fFontCache = cache;     // no need to ref, it won't go away before we do
+    fAtlasMgr = atlasMgr;   // no need to ref, it won't go away before we do
+    fAtlas = NULL;
+
+    fMaskFormat = format;
+
+#if GR_DEBUG
+//    GrPrintf(" GrTextStrike %p %d\n", this, gCounter);
+    gCounter += 1;
+#endif
+}
+
+static void FreeGlyph(GrGlyph*& glyph) { glyph->free(); }
+
+GrTextStrike::~GrTextStrike() {
+    GrAtlas::FreeLList(fAtlas);
+    fFontScalerKey->unref();
+    fCache.getArray().visit(FreeGlyph);
+
+#if GR_DEBUG
+    gCounter -= 1;
+//    GrPrintf("~GrTextStrike %p %d\n", this, gCounter);
+#endif
+}
+
+GrGlyph* GrTextStrike::generateGlyph(GrGlyph::PackedID packed,
+                                     GrFontScaler* scaler) {
+    GrIRect bounds;
+    if (!scaler->getPackedGlyphBounds(packed, &bounds)) {
+        return NULL;
+    }
+
+    GrGlyph* glyph = fPool.alloc();
+    glyph->init(packed, bounds);
+    fCache.insert(packed, glyph);
+    return glyph;
+}
+
+bool GrTextStrike::getGlyphAtlas(GrGlyph* glyph, GrFontScaler* scaler) {
+#if 0   // testing hack to force us to flush our cache often
+    static int gCounter;
+    if ((++gCounter % 10) == 0) return false;
+#endif
+
+    GrAssert(glyph);
+    GrAssert(scaler);
+    GrAssert(fCache.contains(glyph));
+    if (glyph->fAtlas) {
+        return true;
+    }
+
+    GrAutoRef ar(scaler);
+
+    int bytesPerPixel = GrMaskFormatBytesPerPixel(fMaskFormat);
+    size_t size = glyph->fBounds.area() * bytesPerPixel;
+    SkAutoSMalloc<1024> storage(size);
+    if (!scaler->getPackedGlyphImage(glyph->fPackedID, glyph->width(),
+                                     glyph->height(),
+                                     glyph->width() * bytesPerPixel,
+                                     storage.get())) {
+        return false;
+    }
+
+    GrAtlas* atlas = fAtlasMgr->addToAtlas(fAtlas, glyph->width(),
+                                           glyph->height(), storage.get(),
+                                           fMaskFormat,
+                                           &glyph->fAtlasLocation);
+    if (NULL == atlas) {
+        return false;
+    }
+
+    // update fAtlas as well, since they may be chained in a linklist
+    glyph->fAtlas = fAtlas = atlas;
+    return true;
+}
+
+
-- 
cgit v1.2.3