1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "GrInvariantOutput.h" 9 10 #ifdef SK_DEBUG 11 validate() const12void GrInvariantOutput::validate() const { 13 if (fIsSingleComponent) { 14 SkASSERT(0 == fValidFlags || kRGBA_GrColorComponentFlags == fValidFlags); 15 if (kRGBA_GrColorComponentFlags == fValidFlags) { 16 SkASSERT(this->colorComponentsAllEqual()); 17 } 18 } 19 20 SkASSERT(this->validPreMulColor()); 21 22 // If we claim that we are not using the input color we must not be modulating the input. 23 SkASSERT(fNonMulStageFound || fWillUseInputColor); 24 } 25 colorComponentsAllEqual() const26bool GrInvariantOutput::colorComponentsAllEqual() const { 27 unsigned colorA = GrColorUnpackA(fColor); 28 return(GrColorUnpackR(fColor) == colorA && 29 GrColorUnpackG(fColor) == colorA && 30 GrColorUnpackB(fColor) == colorA); 31 } 32 validPreMulColor() const33bool GrInvariantOutput::validPreMulColor() const { 34 if (kA_GrColorComponentFlag & fValidFlags) { 35 float c[4]; 36 GrColorToRGBAFloat(fColor, c); 37 if (kR_GrColorComponentFlag & fValidFlags) { 38 if (c[0] > c[3]) { 39 return false; 40 } 41 } 42 if (kG_GrColorComponentFlag & fValidFlags) { 43 if (c[1] > c[3]) { 44 return false; 45 } 46 } 47 if (kB_GrColorComponentFlag & fValidFlags) { 48 if (c[2] > c[3]) { 49 return false; 50 } 51 } 52 } 53 return true; 54 } 55 56 #endif // end DEBUG 57 58