1 /* 2 * Copyright 2010 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 "SkImageInfo.h" 9 #include "SkFlattenableBuffers.h" 10 11 static bool alpha_type_is_valid(SkAlphaType alphaType) { 12 return (alphaType >= 0) && (alphaType <= kLastEnum_SkAlphaType); 13 } 14 15 static bool color_type_is_valid(SkColorType colorType) { 16 return (colorType >= 0) && (colorType <= kLastEnum_SkColorType); 17 } 18 19 void SkImageInfo::unflatten(SkFlattenableReadBuffer& buffer) { 20 fWidth = buffer.read32(); 21 fHeight = buffer.read32(); 22 23 uint32_t packed = buffer.read32(); 24 SkASSERT(0 == (packed >> 16)); 25 fAlphaType = (SkAlphaType)((packed >> 8) & 0xFF); 26 fColorType = (SkColorType)((packed >> 0) & 0xFF); 27 buffer.validate(alpha_type_is_valid(fAlphaType) && 28 color_type_is_valid(fColorType)); 29 } 30 31 void SkImageInfo::flatten(SkFlattenableWriteBuffer& buffer) const { 32 buffer.write32(fWidth); 33 buffer.write32(fHeight); 34 35 SkASSERT(0 == (fAlphaType & ~0xFF)); 36 SkASSERT(0 == (fColorType & ~0xFF)); 37 uint32_t packed = (fAlphaType << 8) | fColorType; 38 buffer.write32(packed); 39 } 40
