d9187c085b
This reverts commit 3b347232bc.
Reason for revert: tree done gone red.
Original change's description:
> SkMath takes some functions from from SkTypes
>
> Moved to include/core/SkMath.h: Sk{Is|}Align{2|4|8|Ptr}, SkLeftShift,
> SkAbs{32|}, SkM{ax|in}32 SkTM{in|ax}, SkTClamp, SkFastMin32, SkTPin.
>
> Change-Id: Ibcc07be0fc3677731048e7cc86006e7aa493cb92
> Reviewed-on: https://skia-review.googlesource.com/133381
> Auto-Submit: Hal Canary <halcanary@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Hal Canary <halcanary@google.com>
TBR=mtklein@google.com,halcanary@google.com,bungeman@google.com,reed@google.com
Change-Id: I44073cf397e2a3a6a941a90f0aa63c6396d4c742
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/152587
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
125 lines
4.5 KiB
C
125 lines
4.5 KiB
C
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkImageInfoPriv_DEFINED
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#define SkImageInfoPriv_DEFINED
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#include "SkImageInfo.h"
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enum SkColorTypeComponentFlag {
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kRed_SkColorTypeComponentFlag = 0x1,
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kGreen_SkColorTypeComponentFlag = 0x2,
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kBlue_SkColorTypeComponentFlag = 0x4,
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kAlpha_SkColorTypeComponentFlag = 0x8,
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kGray_SkColorTypeComponentFlag = 0x10,
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kRGB_SkColorTypeComponentFlags = kRed_SkColorTypeComponentFlag |
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kGreen_SkColorTypeComponentFlag |
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kBlue_SkColorTypeComponentFlag,
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kRGBA_SkColorTypeComponentFlags = kRGB_SkColorTypeComponentFlags |
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kAlpha_SkColorTypeComponentFlag,
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};
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static inline uint32_t SkColorTypeComponentFlags(SkColorType ct) {
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switch (ct) {
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case kUnknown_SkColorType: return 0;
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case kAlpha_8_SkColorType: return kAlpha_SkColorTypeComponentFlag;
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case kRGB_565_SkColorType: return kRGB_SkColorTypeComponentFlags;
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case kARGB_4444_SkColorType: return kRGBA_SkColorTypeComponentFlags;
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case kRGBA_8888_SkColorType: return kRGBA_SkColorTypeComponentFlags;
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case kRGB_888x_SkColorType: return kRGB_SkColorTypeComponentFlags;
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case kBGRA_8888_SkColorType: return kRGBA_SkColorTypeComponentFlags;
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case kRGBA_1010102_SkColorType: return kRGBA_SkColorTypeComponentFlags;
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case kRGB_101010x_SkColorType: return kRGB_SkColorTypeComponentFlags;
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case kGray_8_SkColorType: return kGray_SkColorTypeComponentFlag;
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case kRGBA_F16_SkColorType: return kRGBA_SkColorTypeComponentFlags;
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case kRGBA_F32_SkColorType: return kRGBA_SkColorTypeComponentFlags;
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}
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return 0;
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}
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static inline bool SkColorTypeIsAlphaOnly(SkColorType ct) {
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return kAlpha_SkColorTypeComponentFlag == SkColorTypeComponentFlags(ct);
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}
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static inline bool SkAlphaTypeIsValid(unsigned value) {
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return value <= kLastEnum_SkAlphaType;
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}
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static inline bool SkColorTypeIsGray(SkColorType ct) {
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auto flags = SkColorTypeComponentFlags(ct);
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// Currently assuming that a color type has only gray or does not have gray.
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SkASSERT(!(kGray_SkColorTypeComponentFlag & flags) || kGray_SkColorTypeComponentFlag == flags);
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return kGray_SkColorTypeComponentFlag == flags;
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}
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static int SkColorTypeShiftPerPixel(SkColorType ct) {
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switch (ct) {
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case kUnknown_SkColorType: return 0;
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case kAlpha_8_SkColorType: return 0;
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case kRGB_565_SkColorType: return 1;
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case kARGB_4444_SkColorType: return 1;
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case kRGBA_8888_SkColorType: return 2;
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case kRGB_888x_SkColorType: return 2;
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case kBGRA_8888_SkColorType: return 2;
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case kRGBA_1010102_SkColorType: return 2;
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case kRGB_101010x_SkColorType: return 2;
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case kGray_8_SkColorType: return 0;
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case kRGBA_F16_SkColorType: return 3;
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case kRGBA_F32_SkColorType: return 4;
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}
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return 0;
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}
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static inline size_t SkColorTypeMinRowBytes(SkColorType ct, int width) {
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return width * SkColorTypeBytesPerPixel(ct);
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}
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static inline bool SkColorTypeIsValid(unsigned value) {
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return value <= kLastEnum_SkColorType;
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}
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static inline size_t SkColorTypeComputeOffset(SkColorType ct, int x, int y, size_t rowBytes) {
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if (kUnknown_SkColorType == ct) {
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return 0;
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}
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return y * rowBytes + (x << SkColorTypeShiftPerPixel(ct));
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}
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/**
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* Returns true if |info| contains a valid combination of width, height, colorType, and alphaType.
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*/
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static inline bool SkImageInfoIsValid(const SkImageInfo& info) {
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if (info.width() <= 0 || info.height() <= 0) {
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return false;
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}
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const int kMaxDimension = SK_MaxS32 >> 2;
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if (info.width() > kMaxDimension || info.height() > kMaxDimension) {
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return false;
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}
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if (kUnknown_SkColorType == info.colorType() || kUnknown_SkAlphaType == info.alphaType()) {
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return false;
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}
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if (kOpaque_SkAlphaType != info.alphaType() &&
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(kRGB_565_SkColorType == info.colorType() || kGray_8_SkColorType == info.colorType())) {
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return false;
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}
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return true;
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}
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/**
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* Returns true if Skia has defined a pixel conversion from the |src| to the |dst|.
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* Returns false otherwise.
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*/
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static inline bool SkImageInfoValidConversion(const SkImageInfo& dst, const SkImageInfo& src) {
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return SkImageInfoIsValid(dst) && SkImageInfoIsValid(src);
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}
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#endif // SkImageInfoPriv_DEFINED
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