blob: 4c77df32f47fa3e74f8d873d8b6d130e9f37cd35 [file] [log] [blame]
egdaniel605dd0f2014-11-12 08:35:25 -08001/*
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
12void 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
26bool GrInvariantOutput::colorComponentsAllEqual() const {
27 unsigned colorA = GrColorUnpackA(fColor);
28 return(GrColorUnpackR(fColor) == colorA &&
29 GrColorUnpackG(fColor) == colorA &&
30 GrColorUnpackB(fColor) == colorA);
31}
32
33bool 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}
egdanielb6cbc382014-11-13 11:00:34 -080055
egdaniel605dd0f2014-11-12 08:35:25 -080056#endif // end DEBUG
57