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| 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::kImageWidt
h + 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 |
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