1 /* 2 * Copyright 2016 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 "UrlHandler.h" 9 10 #include "microhttpd.h" 11 #include "../Request.h" 12 #include "../Response.h" 13 14 using namespace Response; 15 16 bool BreakHandler::canHandle(const char* method, const char* url) { 17 static const char* kBasePath = "/break"; 18 return 0 == strcmp(method, MHD_HTTP_METHOD_GET) && 19 0 == strncmp(url, kBasePath, strlen(kBasePath)); 20 } 21 22 int BreakHandler::handle(Request* request, MHD_Connection* connection, 23 const char* url, const char* method, 24 const char* upload_data, size_t* upload_data_size) { 25 SkTArray<SkString> commands; 26 SkStrSplit(url, "/", &commands); 27 28 if (!request->hasPicture() || commands.count() != 4) { 29 return MHD_NO; 30 } 31 32 // /break/<n>/<x>/<y> 33 int n; 34 sscanf(commands[1].c_str(), "%d", &n); 35 int x; 36 sscanf(commands[2].c_str(), "%d", &x); 37 int y; 38 sscanf(commands[3].c_str(), "%d", &y); 39 40 int count = request->fDebugCanvas->getSize(); 41 SkASSERT(n < count); 42 43 SkCanvas* canvas = request->getCanvas(); 44 canvas->clear(SK_ColorWHITE); 45 int saveCount = canvas->save(); 46 for (int i = 0; i <= n; ++i) { 47 request->fDebugCanvas->getDrawCommandAt(i)->execute(canvas); 48 } 49 SkColor target = request->getPixel(x, y); 50 Json::Value response(Json::objectValue); 51 Json::Value startColor(Json::arrayValue); 52 startColor.append(Json::Value(SkColorGetR(target))); 53 startColor.append(Json::Value(SkColorGetG(target))); 54 startColor.append(Json::Value(SkColorGetB(target))); 55 startColor.append(Json::Value(SkColorGetA(target))); 56 response["startColor"] = startColor; 57 response["endColor"] = startColor; 58 response["endOp"] = Json::Value(n); 59 for (int i = n + 1; i < n + count; ++i) { 60 int index = i % count; 61 if (index == 0) { 62 // reset canvas for wraparound 63 canvas->restoreToCount(saveCount); 64 canvas->clear(SK_ColorWHITE); 65 saveCount = canvas->save(); 66 } 67 request->fDebugCanvas->getDrawCommandAt(index)->execute(canvas); 68 SkColor current = request->getPixel(x, y); 69 if (current != target) { 70 Json::Value endColor(Json::arrayValue); 71 endColor.append(Json::Value(SkColorGetR(current))); 72 endColor.append(Json::Value(SkColorGetG(current))); 73 endColor.append(Json::Value(SkColorGetB(current))); 74 endColor.append(Json::Value(SkColorGetA(current))); 75 response["endColor"] = endColor; 76 response["endOp"] = Json::Value(index); 77 break; 78 } 79 } 80 canvas->restoreToCount(saveCount); 81 SkDynamicMemoryWStream stream; 82 stream.writeText(Json::FastWriter().write(response).c_str()); 83 return SendData(connection, stream.detachAsData().get(), "application/json"); 84 } 85
