SkPDFCanon

src/pdf/SkPDFCanon.cpp

+/*
+ * 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 "SkPDFCanon.h"
+#include "SkPDFFont.h"
+#include "SkPDFGraphicState.h"
+#include "SkPDFShader.h"
+
+////////////////////////////////////////////////////////////////////////////////
+
+SK_DECLARE_STATIC_MUTEX(gSkPDFCanonFontMutex);
+SK_DECLARE_STATIC_MUTEX(gSkPDFCanonShaderMutex);
+SK_DECLARE_STATIC_MUTEX(gSkPDFCanonPaintMutex);
+
+SkBaseMutex& SkPDFCanon::GetFontMutex() {
+    return gSkPDFCanonFontMutex;
+}
+SkBaseMutex& SkPDFCanon::GetShaderMutex() {
+    return gSkPDFCanonShaderMutex;
+}
+SkBaseMutex& SkPDFCanon::GetPaintMutex() {
+    return gSkPDFCanonPaintMutex;
+}
+
+SkPDFCanon* SkPDFCanon::Create() {
+    return new SkPDFCanon;
+}
+void SkPDFCanon::Destroy(SkPDFCanon* ptr) {
+    delete ptr;
+}
+SkPDFCanon::~SkPDFCanon() {
+}
+SK_DECLARE_STATIC_LAZY_PTR(SkPDFCanon,
+                           singleton,
+                           SkPDFCanon::Create,
+                           SkPDFCanon::Destroy);
+
+SkPDFCanon& SkPDFCanon::GetCanon() {
+    return *singleton.get();
+}
+
+static void assert_mutex_held(SkBaseMutex* mutex) {
+    SkDEBUGCODE(if (mutex) { mutex->assertHeld(); })
+}
+
+SkPDFCanon::SkPDFCanon()
+    : fFontMutex(&gSkPDFCanonFontMutex)
+    , fShaderMutex(&gSkPDFCanonShaderMutex)
+    , fPaintMutex(&gSkPDFCanonPaintMutex) {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+SkPDFFont* SkPDFCanon::findFont(uint32_t fontID,
+                                uint16_t glyphID,
+                                SkPDFFont** relatedFontPtr) const {
+    assert_mutex_held(fFontMutex);
+    SkASSERT(relatedFontPtr);
+
+    SkPDFFont* relatedFont = NULL;
+    for (int i = 0; i < fFontRecords.count(); ++i) {
+        SkPDFFont::Match match = SkPDFFont::IsMatch(
+                fFontRecords[i].fFont, fFontRecords[i].fFontID,

[mtklein, 2015/01/20 21:59:51]

Might put all these arguments one per line, or at least group the related fontID
/ glyphID pairs?

[hal.canary, 2015/01/21 17:07:50]

Done.

+                fFontRecords[i].fGlyphID, fontID, glyphID);
+        if (SkPDFFont::kExact_Match == match) {
+            return fFontRecords[i].fFont;
+        } else if (!relatedFont && SkPDFFont::kRelated_Match == match) {
+            relatedFont = fFontRecords[i].fFont;
+        }
+    }
+    *relatedFontPtr = relatedFont;  // May still be NULL.
+    return NULL;
+}
+
+void SkPDFCanon::addFont(SkPDFFont* font, uint32_t fontID, uint16_t fGlyphID) {
+    assert_mutex_held(fFontMutex);
+    SkPDFCanon::FontRec* rec = fFontRecords.push();
+    rec->fFont = font;
+    rec->fFontID = fontID;
+    rec->fGlyphID = fGlyphID;
+}
+
+void SkPDFCanon::removeFont(SkPDFFont* pdfFont) {
+    assert_mutex_held(fFontMutex);
+    for (int i = 0; i < fFontRecords.count(); i++) {
+        if (fFontRecords[i].fFont == pdfFont) {
+            fFontRecords.removeShuffle(i);
+            return;
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+SkPDFShader* SkPDFCanon::findShader(const SkPDFShaderState& state) const {
+    assert_mutex_held(fShaderMutex);
+    for (int i = 0; i < fShaderRecords.count(); ++i) {
+        if (fShaderRecords[i]->equals(state)) {
+            return fShaderRecords[i];
+        }
+    }
+    return NULL;
+}
+
+void SkPDFCanon::addShader(SkPDFShader* shader) {
+    assert_mutex_held(fShaderMutex);
+    SkASSERT(shader);
+    fShaderRecords.push(shader);
+}
+
+void SkPDFCanon::removeShader(SkPDFShader* pdfShader) {
+    assert_mutex_held(fShaderMutex);
+    for (int i = 0; i < fShaderRecords.count(); ++i) {
+        if (fShaderRecords[i] == pdfShader) {
+            fShaderRecords.removeShuffle(i);
+            return;
+        }
+    }
+    SkDEBUGFAIL("pdfShader not found");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+SkPDFGraphicState* SkPDFCanon::findGraphicState(const SkPaint& paint) const {
+    assert_mutex_held(fPaintMutex);
+    for (int i = 0; i < fGraphicStateRecords.count(); ++i) {
+        if (fGraphicStateRecords[i]->equals(paint)) {
+            return fGraphicStateRecords[i];
+        }
+    }
+    return NULL;
+}
+
+void SkPDFCanon::addGraphicState(SkPDFGraphicState* state) {
+    assert_mutex_held(fPaintMutex);
+    SkASSERT(state);
+    fGraphicStateRecords.push(state);
+}
+
+void SkPDFCanon::removeGraphicState(SkPDFGraphicState* pdfGraphicState) {
+    assert_mutex_held(fPaintMutex);
+    for (int i = 0; i < fGraphicStateRecords.count(); ++i) {
+        if (fGraphicStateRecords[i] == pdfGraphicState) {
+            fGraphicStateRecords.removeShuffle(i);
+            return;
+        }
+    }
+    SkDEBUGFAIL("pdfGraphicState not found");
+}