NinePatchPeeker.cpp revision a730ef3f77fc495bc90199b4d45efab26d609782
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "NinePatchPeeker.h" 18 19#include "SkBitmap.h" 20 21using namespace android; 22 23bool NinePatchPeeker::peek(const char tag[], const void* data, size_t length) { 24 if (!strcmp("npTc", tag) && length >= sizeof(Res_png_9patch)) { 25 Res_png_9patch* patch = (Res_png_9patch*) data; 26 size_t patchSize = patch->serializedSize(); 27 if (length != patchSize) { 28 return false; 29 } 30 // You have to copy the data because it is owned by the png reader 31 Res_png_9patch* patchNew = (Res_png_9patch*) malloc(patchSize); 32 memcpy(patchNew, patch, patchSize); 33 Res_png_9patch::deserialize(patchNew); 34 patchNew->fileToDevice(); 35 free(mPatch); 36 mPatch = patchNew; 37 mPatchSize = patchSize; 38 39 // now update our host to force index or 32bit config 40 // 'cause we don't want 565 predithered, since as a 9patch, we know 41 // we will be stretched, and therefore we want to dither afterwards. 42 SkImageDecoder::PrefConfigTable table; 43 table.fPrefFor_8Index_NoAlpha_src = SkBitmap::kIndex8_Config; 44 table.fPrefFor_8Index_YesAlpha_src = SkBitmap::kIndex8_Config; 45 table.fPrefFor_8Gray_src = SkBitmap::kARGB_8888_Config; 46 table.fPrefFor_8bpc_NoAlpha_src = SkBitmap::kARGB_8888_Config; 47 table.fPrefFor_8bpc_YesAlpha_src = SkBitmap::kARGB_8888_Config; 48 49 mHost->setPrefConfigTable(table); 50 } else if (!strcmp("npLb", tag) && length == sizeof(int32_t) * 4) { 51 mHasInsets = true; 52 memcpy(&mOpticalInsets, data, sizeof(int32_t) * 4); 53 } else if (!strcmp("npOl", tag) && length == 24) { // 4 int32_ts, 1 float, 1 int32_t sized byte 54 mHasInsets = true; 55 memcpy(&mOutlineInsets, data, sizeof(int32_t) * 4); 56 mOutlineRadius = ((const float*)data)[4]; 57 mOutlineAlpha = ((const int32_t*)data)[5] & 0xff; 58 } 59 return true; // keep on decoding 60} 61