BreakHandler Class Reference

#include <UrlHandler.h>

Inheritance diagram for BreakHandler:

Public Member Functions
bool	canHandle (const char *method, const char *url) override
int	handle (Request *request, MHD_Connection *connection, const char *url, const char *method, const char *upload_data, size_t *upload_data_size) override
Public Member Functions inherited from UrlHandler
virtual	~UrlHandler ()

Detailed Description

Definition at line 40 of file UrlHandler.h.

Member Function Documentation

canHandle()

bool BreakHandler::canHandle ( const char *  method, const char *  url  )

overridevirtual

Implements UrlHandler.

Definition at line 20 of file BreakHandler.cpp.

                                                                {
    static const char* kBasePath = "/break";
    return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
           0 == strncmp(url, kBasePath, strlen(kBasePath));
}

handle()

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

overridevirtual

Implements UrlHandler.

Definition at line 26 of file BreakHandler.cpp.

                                                                            {
    TArray<SkString> commands;
    SkStrSplit(url, "/", &commands);
 
    if (!request->hasPicture() || commands.size() != 4) {
        return MHD_NO;
    }
 
    // /break/<n>/<x>/<y>
    int n;
    sscanf(commands[1].c_str(), "%d", &n);
    int x;
    sscanf(commands[2].c_str(), "%d", &x);
    int y;
    sscanf(commands[3].c_str(), "%d", &y);
 
    int count = request->fDebugCanvas->getSize();
    SkASSERT(n < count);
 
    SkCanvas* canvas = request->getCanvas();
    canvas->clear(SK_ColorWHITE);
    int saveCount = canvas->save();
    for (int i = 0; i <= n; ++i) {
        request->fDebugCanvas->getDrawCommandAt(i)->execute(canvas);
    }
    SkColor target = request->getPixel(x, y);
 
    SkDynamicMemoryWStream stream;
    SkJSONWriter writer(&stream, SkJSONWriter::Mode::kFast);
    writer.beginObject(); // root
 
    writer.appendName("startColor");
    DrawCommand::MakeJsonColor(writer, target);
 
    bool changed = false;
    for (int i = n + 1; i < n + count; ++i) {
        int index = i % count;
        if (index == 0) {
            // reset canvas for wraparound
            canvas->restoreToCount(saveCount);
            canvas->clear(SK_ColorWHITE);
            saveCount = canvas->save();
        }
        request->fDebugCanvas->getDrawCommandAt(index)->execute(canvas);
        SkColor current = request->getPixel(x, y);
        if (current != target) {
            writer.appendName("endColor");
            DrawCommand::MakeJsonColor(writer, current);
            writer.appendS32("endOp", index);
            changed = true;
            break;
        }
    }
    if (!changed) {
        writer.appendName("endColor");
        DrawCommand::MakeJsonColor(writer, target);
        writer.appendS32("endOp", n);
    }
    canvas->restoreToCount(saveCount);
 
    writer.endObject(); // root
    writer.flush();
    return SendData(connection, stream.detachAsData().get(), "application/json");
}

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The documentation for this class was generated from the following files:

• third_party/skia/tools/skiaserve/urlhandlers/UrlHandler.h
• third_party/skia/tools/skiaserve/urlhandlers/BreakHandler.cpp