SkValidationUtils.h revision c0b7e10c6a68f59e1653e6c18e6bc954b3c3f0cf 
1/*
2 * Copyright 2013 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#ifndef SkValidationUtils_DEFINED
9#define SkValidationUtils_DEFINED
10
11#include "SkBitmap.h"
12#include "SkXfermode.h"
13
14/** Returns true if coeff's value is in the SkXfermode::Coeff enum.
15  */
16static inline bool SkIsValidCoeff(SkXfermode::Coeff coeff) {
17    return coeff >= 0 && coeff < SkXfermode::kCoeffCount;
18}
19
20/** Returns true if mode's value is in the SkXfermode::Mode enum.
21  */
22static inline bool SkIsValidMode(SkXfermode::Mode mode) {
23    return (mode >= 0) && (mode <= SkXfermode::kLastMode);
24}
25
26/** Returns true if config's value is in the SkBitmap::Config enum.
27  */
28static inline bool SkIsValidConfig(SkBitmap::Config config) {
29    return (config >= 0) && (config <= static_cast<int>(SkBitmap::kConfigCount));
30}
31
32/** Returns true if the rect's dimensions are between 0 and SK_MaxS32
33  */
34static inline bool SkIsValidIRect(const SkIRect& rect) {
35    return rect.width() >= 0 && rect.height() >= 0;
36}
37
38/** Returns true if the rect's dimensions are between 0 and SK_ScalarMax
39  */
40static inline bool SkIsValidRect(const SkRect& rect) {
41    return (rect.fLeft <= rect.fRight) &&
42           (rect.fTop <= rect.fBottom) &&
43           SkScalarIsFinite(rect.width()) &&
44           SkScalarIsFinite(rect.height());
45}
46
47#endif
48