Index: src/core/SkColorSpace_XYZ.cpp |
diff --git a/src/core/SkColorSpace_XYZ.cpp b/src/core/SkColorSpace_XYZ.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1f62245d7353a14475495531eff8d98ab48492ed |
--- /dev/null |
+++ b/src/core/SkColorSpace_XYZ.cpp |
@@ -0,0 +1,78 @@ |
+/* |
+ * Copyright 2016 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#include "SkColorSpace_XYZ.h" |
+#include "SkColorSpaceXform_Base.h" |
+ |
+static constexpr float gSRGB_toXYZD50[] { |
+ 0.4358f, 0.3853f, 0.1430f, // Rx, Gx, Bx |
+ 0.2224f, 0.7170f, 0.0606f, // Ry, Gy, Gz |
+ 0.0139f, 0.0971f, 0.7139f, // Rz, Gz, Bz |
+}; |
+ |
+SkColorSpace_XYZ::SkColorSpace_XYZ(SkGammaNamed gammaNamed, const SkMatrix44& toXYZD50) |
+ : INHERITED(nullptr) |
+ , fGammaNamed(gammaNamed) |
+ , fGammas(nullptr) |
+ , fToXYZD50(toXYZD50) |
+ , fFromXYZD50(SkMatrix44::kUninitialized_Constructor) |
+{} |
+ |
+SkColorSpace_XYZ::SkColorSpace_XYZ(SkGammaNamed gammaNamed, sk_sp<SkGammas> gammas, |
+ const SkMatrix44& toXYZD50, sk_sp<SkData> profileData) |
+ : INHERITED(std::move(profileData)) |
+ , fGammaNamed(gammaNamed) |
+ , fGammas(std::move(gammas)) |
+ , fToXYZD50(toXYZD50) |
+ , fFromXYZD50(SkMatrix44::kUninitialized_Constructor) |
+{} |
+ |
+const SkMatrix44* SkColorSpace_XYZ::fromXYZD50() const { |
+ fFromXYZOnce([this] { |
+ if (!fToXYZD50.invert(&fFromXYZD50)) { |
+ // If a client gives us a dst gamut with a transform that we can't invert, we will |
+ // simply give them back a transform to sRGB gamut. |
+ SkDEBUGFAIL("Non-invertible XYZ matrix, defaulting to sRGB"); |
+ SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor); |
+ srgbToxyzD50.set3x3RowMajorf(gSRGB_toXYZD50); |
+ srgbToxyzD50.invert(&fFromXYZD50); |
+ } |
+ }); |
+ return &fFromXYZD50; |
+} |
+ |
+bool SkColorSpace_XYZ::onGammaCloseToSRGB() const { |
+ return kSRGB_SkGammaNamed == fGammaNamed || k2Dot2Curve_SkGammaNamed == fGammaNamed; |
+} |
+ |
+bool SkColorSpace_XYZ::onGammaIsLinear() const { |
+ return kLinear_SkGammaNamed == fGammaNamed; |
+} |
+ |
+sk_sp<SkColorSpace> SkColorSpace_XYZ::makeLinearGamma() { |
+ if (this->gammaIsLinear()) { |
+ return sk_ref_sp(this); |
+ } |
+ return SkColorSpace_Base::NewRGB(kLinear_SkGammaNamed, fToXYZD50); |
+} |
+ |
+void SkColorSpace_XYZ::toDstGammaTables(const uint8_t* tables[3], sk_sp<SkData>* storage, |
+ int numTables) const { |
+ fToDstGammaOnce([this, numTables] { |
+ const bool gammasAreMatching = numTables <= 1; |
+ fDstStorage = |
+ SkData::MakeUninitialized(numTables * SkColorSpaceXform_Base::kDstGammaTableSize); |
+ SkColorSpaceXform_Base::BuildDstGammaTables(fToDstGammaTables, |
+ (uint8_t*) fDstStorage->writable_data(), this, |
+ gammasAreMatching); |
+ }); |
+ |
+ *storage = fDstStorage; |
+ tables[0] = fToDstGammaTables[0]; |
+ tables[1] = fToDstGammaTables[1]; |
+ tables[2] = fToDstGammaTables[2]; |
+} |