Prepare SkColorSpace to be a public API
Moves implementation details into SkColorSpacePriv.h
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1985903002
Review-Url: https://codereview.chromium.org/1985903002
diff --git a/src/core/SkColorSpacePriv.h b/src/core/SkColorSpacePriv.h
new file mode 100644
index 0000000..a07640b
--- /dev/null
+++ b/src/core/SkColorSpacePriv.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkColorSpacePriv_DEFINED
+#define SkColorSpacePriv_DEFINED
+
+struct SkGammaCurve {
+ bool isValue() const {
+ bool result = (0.0f != fValue);
+ SkASSERT(!result || (0 == fTableSize));
+ return result;
+ }
+
+ bool isTable() const {
+ bool result = (0 != fTableSize);
+ SkASSERT(!result || (0.0f == fValue));
+ SkASSERT(!result || fTable);
+ return result;
+ }
+
+ bool isParametric() const { return false; }
+
+ // We have three different ways to represent gamma.
+ // (1) A single value:
+ float fValue;
+
+ // (2) A lookup table:
+ uint32_t fTableSize;
+ std::unique_ptr<float[]> fTable;
+
+ // (3) Parameters for a curve:
+ // FIXME (msarett): Handle parametric curves.
+
+ SkGammaCurve() {
+ memset(this, 0, sizeof(struct SkGammaCurve));
+ }
+
+ SkGammaCurve(float value)
+ : fValue(value)
+ , fTableSize(0)
+ , fTable(nullptr)
+ {}
+};
+
+struct SkGammas : public SkRefCnt {
+public:
+ bool isValues() const {
+ return fRed.isValue() && fGreen.isValue() && fBlue.isValue();
+ }
+
+ SkGammaCurve fRed;
+ SkGammaCurve fGreen;
+ SkGammaCurve fBlue;
+
+ SkGammas(float red, float green, float blue)
+ : fRed(red)
+ , fGreen(green)
+ , fBlue(blue)
+ {}
+
+ SkGammas() {}
+
+ friend class SkColorSpace;
+};
+
+struct SkColorLookUpTable {
+ static const uint8_t kMaxChannels = 16;
+
+ uint8_t fInputChannels;
+ uint8_t fOutputChannels;
+ uint8_t fGridPoints[kMaxChannels];
+ std::unique_ptr<float[]> fTable;
+
+ SkColorLookUpTable() {
+ memset(this, 0, sizeof(struct SkColorLookUpTable));
+ }
+};
+
+#endif