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
canHandle(const char * method,const char * url)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
handle(Request * request,MHD_Connection * connection,const char * url,const char * method,const char * upload_data,size_t * upload_data_size)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