Move GrInvariantOutput out of GrProcessor and into its own class.
This will help with the ability to subclass, add to, etc. GrInvariantOutput. Also it was simply
getting a little too big to be a "supporting" subclass
BUG=skia:
Review URL: https://codereview.chromium.org/699943003
diff --git a/src/gpu/GrInvariantOutput.cpp b/src/gpu/GrInvariantOutput.cpp
new file mode 100644
index 0000000..6f9a9d1
--- /dev/null
+++ b/src/gpu/GrInvariantOutput.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrInvariantOutput.h"
+
+#ifdef SK_DEBUG
+
+void GrInvariantOutput::validate() const {
+ if (fIsSingleComponent) {
+ SkASSERT(0 == fValidFlags || kRGBA_GrColorComponentFlags == fValidFlags);
+ if (kRGBA_GrColorComponentFlags == fValidFlags) {
+ SkASSERT(this->colorComponentsAllEqual());
+ }
+ }
+
+ SkASSERT(this->validPreMulColor());
+
+ // If we claim that we are not using the input color we must not be modulating the input.
+ SkASSERT(fNonMulStageFound || fWillUseInputColor);
+}
+
+bool GrInvariantOutput::colorComponentsAllEqual() const {
+ unsigned colorA = GrColorUnpackA(fColor);
+ return(GrColorUnpackR(fColor) == colorA &&
+ GrColorUnpackG(fColor) == colorA &&
+ GrColorUnpackB(fColor) == colorA);
+}
+
+bool GrInvariantOutput::validPreMulColor() const {
+ if (kA_GrColorComponentFlag & fValidFlags) {
+ float c[4];
+ GrColorToRGBAFloat(fColor, c);
+ if (kR_GrColorComponentFlag & fValidFlags) {
+ if (c[0] > c[3]) {
+ return false;
+ }
+ }
+ if (kG_GrColorComponentFlag & fValidFlags) {
+ if (c[1] > c[3]) {
+ return false;
+ }
+ }
+ if (kB_GrColorComponentFlag & fValidFlags) {
+ if (c[2] > c[3]) {
+ return false;
+ }
+ }
+ }
+ return true;
+}
+#endif // end DEBUG
+