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 SkColor BreakHandler::GetPixel(Request* request, int x, int y) { 23 SkCanvas* canvas = request->getCanvas(); 24 canvas->flush(); 25 SkAutoTDelete<SkBitmap> bitmap(request->getBitmapFromCanvas(canvas)); 26 SkASSERT(bitmap); 27 bitmap->lockPixels(); 28 uint8_t* start = ((uint8_t*) bitmap->getPixels()) + (y * Request::kImageWidth + x) * 4; 29 SkColor result = SkColorSetARGB(start[3], start[0], start[1], start[2]); 30 bitmap->unlockPixels(); 31 return result; 32 } 33 34 35 int BreakHandler::handle(Request* request, MHD_Connection* connection, 36 const char* url, const char* method, 37 const char* upload_data, size_t* upload_data_size) { 38 SkTArray<SkString> commands; 39 SkStrSplit(url, "/", &commands); 40 41 if (!request->fPicture.get() || commands.count() != 4) { 42 return MHD_NO; 43 } 44 45 // /break/<n>/<x>/<y> 46 int n; 47 sscanf(commands[1].c_str(), "%d", &n); 48 int x; 49 sscanf(commands[2].c_str(), "%d", &x); 50 int y; 51 sscanf(commands[3].c_str(), "%d", &y); 52 53 int count = request->fDebugCanvas->getSize(); 54 SkASSERT(n < count); 55 56 SkCanvas* canvas = request->getCanvas(); 57 canvas->clear(SK_ColorWHITE); 58 int saveCount = canvas->save(); 59 for (int i = 0; i <= n; ++i) { 60 request->fDebugCanvas->getDrawCommandAt(i)->execute(canvas); 61 } 62 SkColor target = GetPixel(request, x, y); 63 Json::Value response(Json::objectValue); 64 Json::Value startColor(Json::arrayValue); 65 startColor.append(Json::Value(SkColorGetR(target))); 66 startColor.append(Json::Value(SkColorGetG(target))); 67 startColor.append(Json::Value(SkColorGetB(target))); 68 startColor.append(Json::Value(SkColorGetA(target))); 69 response["startColor"] = startColor; 70 response["endColor"] = startColor; 71 response["endOp"] = Json::Value(n); 72 for (int i = n + 1; i < n + count; ++i) { 73 int index = i % count; 74 if (index == 0) { 75 // reset canvas for wraparound 76 canvas->restoreToCount(saveCount); 77 canvas->clear(SK_ColorWHITE); 78 saveCount = canvas->save(); 79 } 80 request->fDebugCanvas->getDrawCommandAt(index)->execute(canvas); 81 SkColor current = GetPixel(request, x, y); 82 if (current != target) { 83 Json::Value endColor(Json::arrayValue); 84 endColor.append(Json::Value(SkColorGetR(current))); 85 endColor.append(Json::Value(SkColorGetG(current))); 86 endColor.append(Json::Value(SkColorGetB(current))); 87 endColor.append(Json::Value(SkColorGetA(current))); 88 response["endColor"] = endColor; 89 response["endOp"] = Json::Value(index); 90 break; 91 } 92 } 93 canvas->restoreToCount(saveCount); 94 SkDynamicMemoryWStream stream; 95 stream.writeText(Json::FastWriter().write(response).c_str()); 96 SkAutoTUnref<SkData> data(stream.copyToData()); 97 return SendData(connection, data, "application/json"); 98 } 99 100
