skia2/tools/skiaserve/skiaserve.cpp

556 lines
19 KiB
C++

/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrCaps.h"
#include "GrContextFactory.h"
#include "SkCanvas.h"
#include "SkCommandLineFlags.h"
#include "SkDebugCanvas.h"
#include "SkJSONCanvas.h"
#include "SkJSONCPP.h"
#include "SkPicture.h"
#include "SkPictureRecorder.h"
#include "SkPixelSerializer.h"
#include "SkStream.h"
#include "SkSurface.h"
#include "UrlDataManager.h"
#include <sys/socket.h>
#include <microhttpd.h>
// To get image decoders linked in we have to do the below magic
#include "SkForceLinking.h"
#include "SkImageDecoder.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
DEFINE_string(source, "https://debugger.skia.org", "Where to load the web UI from.");
DEFINE_string(faviconDir, "tools/skiaserve", "The directory of the favicon");
DEFINE_int32(port, 8888, "The port to listen on.");
// TODO probably want to make this configurable
static const int kImageWidth = 1920;
static const int kImageHeight = 1080;
// TODO move to template file
SkString generateTemplate(SkString source) {
SkString debuggerTemplate;
debuggerTemplate.appendf(
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>SkDebugger</title>\n"
" <meta charset=\"utf-8\" />\n"
" <meta http-equiv=\"X-UA-Compatible\" content=\"IE=egde,chrome=1\">\n"
" <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n"
" <script src=\"%s/res/js/core.js\" type=\"text/javascript\" charset=\"utf-8\"></script>\n"
" <link href=\"%s/res/vul/elements.html\" rel=\"import\" />\n"
"</head>\n"
"<body class=\"fullbleed layout vertical\">\n"
" <debugger-app-sk>This is the app."
" </debugger-app-sk>\n"
"</body>\n"
"</html>", source.c_str(), source.c_str());
return debuggerTemplate;
}
struct UploadContext {
SkDynamicMemoryWStream fStream;
MHD_PostProcessor* fPostProcessor;
MHD_Connection* connection;
};
struct Request {
Request(SkString rootUrl) : fUploadContext(nullptr), fUrlDataManager(rootUrl) {}
UploadContext* fUploadContext;
SkAutoTUnref<SkPicture> fPicture;
SkAutoTUnref<SkDebugCanvas> fDebugCanvas;
UrlDataManager fUrlDataManager;
};
// TODO factor this out into functions, also handle CPU path
SkSurface* setupSurface(GrContextFactory* factory) {
GrContext* context = factory->get(GrContextFactory::kNative_GLContextType,
GrContextFactory::kNone_GLContextOptions);
int maxRTSize = context->caps()->maxRenderTargetSize();
SkImageInfo info = SkImageInfo::Make(SkTMin(kImageWidth, maxRTSize),
SkTMin(kImageHeight, maxRTSize),
kN32_SkColorType, kPremul_SkAlphaType);
uint32_t flags = 0;
SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
SkSurface* surface = SkSurface::NewRenderTarget(context, SkSurface::kNo_Budgeted, info, 0,
&props);
SkASSERT(surface);
SkGLContext* gl = factory->getContextInfo(GrContextFactory::kNative_GLContextType,
GrContextFactory::kNone_GLContextOptions).fGLContext;
gl->makeCurrent();
return surface;
}
SkData* writeCanvasToPng(SkCanvas* canvas) {
// capture pixels
SkBitmap bmp;
bmp.setInfo(canvas->imageInfo());
if (!canvas->readPixels(&bmp, 0, 0)) {
fprintf(stderr, "Can't read pixels\n");
return nullptr;
}
// write to png
// TODO encoding to png can be quite slow, we should investigate bmp
SkData* png = SkImageEncoder::EncodeData(bmp, SkImageEncoder::kPNG_Type, 100);
if (!png) {
fprintf(stderr, "Can't encode to png\n");
return nullptr;
}
return png;
}
SkData* setupAndDrawToCanvasReturnPng(SkDebugCanvas* debugCanvas, int n) {
GrContextOptions grContextOpts;
SkAutoTDelete<GrContextFactory> factory(new GrContextFactory(grContextOpts));
SkAutoTUnref<SkSurface> surface(setupSurface(factory.get()));
SkASSERT(debugCanvas);
SkCanvas* canvas = surface->getCanvas();
debugCanvas->drawTo(canvas, n);
return writeCanvasToPng(canvas);
}
SkSurface* setupCpuSurface() {
SkImageInfo info = SkImageInfo::Make(kImageWidth, kImageHeight, kN32_SkColorType,
kPremul_SkAlphaType);
return SkSurface::NewRaster(info);
}
static const size_t kBufferSize = 1024;
static int process_upload_data(void* cls, enum MHD_ValueKind kind,
const char* key, const char* filename,
const char* content_type, const char* transfer_encoding,
const char* data, uint64_t off, size_t size) {
struct UploadContext* uc = reinterpret_cast<UploadContext*>(cls);
if (0 != size) {
uc->fStream.write(data, size);
}
return MHD_YES;
}
static int SendData(MHD_Connection* connection, const SkData* data, const char* type,
bool setContentDisposition = false, const char* dispositionString = nullptr) {
MHD_Response* response = MHD_create_response_from_buffer(data->size(),
const_cast<void*>(data->data()),
MHD_RESPMEM_MUST_COPY);
MHD_add_response_header(response, "Content-Type", type);
if (setContentDisposition) {
MHD_add_response_header(response, "Content-Disposition", dispositionString);
}
int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
MHD_destroy_response(response);
return ret;
}
static int SendJSON(MHD_Connection* connection, SkDebugCanvas* debugCanvas, int n) {
SkDynamicMemoryWStream stream;
SkAutoTUnref<SkJSONCanvas> jsonCanvas(new SkJSONCanvas(kImageWidth, kImageHeight, stream));
debugCanvas->drawTo(jsonCanvas, n);
jsonCanvas->finish();
SkAutoTUnref<SkData> data(stream.copyToData());
return SendData(connection, data, "application/json");
}
static int SendTemplate(MHD_Connection* connection, bool redirect = false,
const char* redirectUrl = nullptr) {
SkString debuggerTemplate = generateTemplate(SkString(FLAGS_source[0]));
MHD_Response* response = MHD_create_response_from_buffer(
debuggerTemplate.size(),
(void*) const_cast<char*>(debuggerTemplate.c_str()),
MHD_RESPMEM_MUST_COPY);
MHD_add_response_header (response, "Access-Control-Allow-Origin", "*");
int status = MHD_HTTP_OK;
if (redirect) {
MHD_add_response_header (response, "Location", redirectUrl);
status = MHD_HTTP_SEE_OTHER;
}
int ret = MHD_queue_response(connection, status, response);
MHD_destroy_response(response);
return ret;
}
class UrlHandler {
public:
virtual ~UrlHandler() {}
virtual bool canHandle(const char* method, const char* url) = 0;
virtual int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) = 0;
};
class CmdHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
const char* kBasePath = "/cmd";
return 0 == strncmp(url, kBasePath, strlen(kBasePath));
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
SkTArray<SkString> commands;
SkStrSplit(url, "/", &commands);
if (!request->fPicture.get() || commands.count() > 3) {
return MHD_NO;
}
// /cmd or /cmd/N or /cmd/N/[0|1]
if (commands.count() == 1 && 0 == strcmp(method, MHD_HTTP_METHOD_GET)) {
int n = request->fDebugCanvas->getSize() - 1;
return SendJSON(connection, request->fDebugCanvas, n);
}
// /cmd/N, for now only delete supported
if (commands.count() == 2 && 0 == strcmp(method, MHD_HTTP_METHOD_DELETE)) {
int n;
sscanf(commands[1].c_str(), "%d", &n);
request->fDebugCanvas->deleteDrawCommandAt(n);
return MHD_YES;
}
// /cmd/N/[0|1]
if (commands.count() == 3 && 0 == strcmp(method, MHD_HTTP_METHOD_POST)) {
int n, toggle;
sscanf(commands[1].c_str(), "%d", &n);
sscanf(commands[2].c_str(), "%d", &toggle);
request->fDebugCanvas->toggleCommand(n, toggle);
return MHD_YES;
}
return MHD_NO;
}
};
class ImgHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
static const char* kBasePath = "/img";
return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
0 == strncmp(url, kBasePath, strlen(kBasePath));
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
SkTArray<SkString> commands;
SkStrSplit(url, "/", &commands);
if (!request->fPicture.get() || commands.count() > 2) {
return MHD_NO;
}
int n;
// /img or /img/N
if (commands.count() == 1) {
n = request->fDebugCanvas->getSize() - 1;
} else {
sscanf(commands[1].c_str(), "%d", &n);
}
SkAutoTUnref<SkData> data(setupAndDrawToCanvasReturnPng(request->fDebugCanvas, n));
return SendData(connection, data, "image/png");
}
};
class PostHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
return 0 == strcmp(method, MHD_HTTP_METHOD_POST) &&
0 == strcmp(url, "/new");
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
UploadContext* uc = request->fUploadContext;
// New connection
if (!uc) {
// TODO make this a method on request
uc = new UploadContext;
uc->connection = connection;
uc->fPostProcessor = MHD_create_post_processor(connection, kBufferSize,
&process_upload_data, uc);
SkASSERT(uc->fPostProcessor);
request->fUploadContext = uc;
return MHD_YES;
}
// in process upload
if (0 != *upload_data_size) {
SkASSERT(uc->fPostProcessor);
MHD_post_process(uc->fPostProcessor, upload_data, *upload_data_size);
*upload_data_size = 0;
return MHD_YES;
}
// end of upload
MHD_destroy_post_processor(uc->fPostProcessor);
uc->fPostProcessor = nullptr;
// parse picture from stream
request->fPicture.reset(
SkPicture::CreateFromStream(request->fUploadContext->fStream.detachAsStream()));
if (!request->fPicture.get()) {
fprintf(stderr, "Could not create picture from stream.\n");
return MHD_NO;
}
// pour picture into debug canvas
request->fDebugCanvas.reset(new SkDebugCanvas(kImageWidth, kImageHeight));
request->fDebugCanvas->drawPicture(request->fPicture);
// clear upload context
delete request->fUploadContext;
request->fUploadContext = nullptr;
return SendTemplate(connection, true, "/");
}
};
class DownloadHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
0 == strcmp(url, "/download");
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
if (!request->fPicture.get()) {
return MHD_NO;
}
// TODO move to a function
// Playback into picture recorder
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(kImageWidth, kImageHeight);
request->fDebugCanvas->draw(canvas);
SkAutoTUnref<SkPicture> picture(recorder.endRecording());
SkDynamicMemoryWStream outStream;
SkAutoTUnref<SkPixelSerializer> serializer(SkImageEncoder::CreatePixelSerializer());
picture->serialize(&outStream, serializer);
SkAutoTUnref<SkData> data(outStream.copyToData());
// TODO fancier name handling
return SendData(connection, data, "application/octet-stream", true,
"attachment; filename=something.skp;");
}
};
class InfoHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
const char* kBaseName = "/info";
return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
0 == strncmp(url, kBaseName, strlen(kBaseName));
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
SkTArray<SkString> commands;
SkStrSplit(url, "/", &commands);
if (!request->fPicture.get() || commands.count() > 2) {
return MHD_NO;
}
// drawTo
SkAutoTUnref<SkSurface> surface(setupCpuSurface());
SkCanvas* canvas = surface->getCanvas();
int n;
// /info or /info/N
if (commands.count() == 1) {
n = request->fDebugCanvas->getSize() - 1;
} else {
sscanf(commands[1].c_str(), "%d", &n);
}
// TODO this is really slow and we should cache the matrix and clip
request->fDebugCanvas->drawTo(canvas, n);
// make some json
SkMatrix vm = request->fDebugCanvas->getCurrentMatrix();
SkIRect clip = request->fDebugCanvas->getCurrentClip();
Json::Value info(Json::objectValue);
info["ViewMatrix"] = SkJSONCanvas::MakeMatrix(vm);
info["ClipRect"] = SkJSONCanvas::MakeIRect(clip);
std::string json = Json::FastWriter().write(info);
// We don't want the null terminator so strlen is correct
SkAutoTUnref<SkData> data(SkData::NewWithCopy(json.c_str(), strlen(json.c_str())));
return SendData(connection, data, "application/json");
}
};
class DataHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
static const char* kBaseUrl = "/data";
return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
0 == strncmp(url, kBaseUrl, strlen(kBaseUrl));
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
SkTArray<SkString> commands;
SkStrSplit(url, "/", &commands);
if (!request->fPicture.get() || commands.count() != 2) {
return MHD_NO;
}
SkAutoTUnref<UrlDataManager::UrlData> urlData(
SkRef(request->fUrlDataManager.getDataFromUrl(SkString(url))));
if (urlData) {
return SendData(connection, urlData->fData.get(), urlData->fContentType.c_str());
}
return MHD_NO;
}
};
class FaviconHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
0 == strcmp(url, "/favicon.ico");
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
SkString dir(FLAGS_faviconDir[0]);
dir.append("/favicon.ico");
FILE* ico = fopen(dir.c_str(), "r");
SkAutoTUnref<SkData> data(SkData::NewFromFILE(ico));
int ret = SendData(connection, data, "image/vnd.microsoft.icon");
fclose(ico);
return ret;
}
};
class RootHandler : public UrlHandler {
public:
bool canHandle(const char* method, const char* url) override {
return 0 == strcmp(method, MHD_HTTP_METHOD_GET) &&
0 == strcmp(url, "/");
}
int handle(Request* request, MHD_Connection* connection,
const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) override {
return SendTemplate(connection);
}
};
class UrlManager {
public:
UrlManager() {
// Register handlers
fHandlers.push_back(new RootHandler);
fHandlers.push_back(new PostHandler);
fHandlers.push_back(new ImgHandler);
fHandlers.push_back(new CmdHandler);
fHandlers.push_back(new InfoHandler);
fHandlers.push_back(new DownloadHandler);
fHandlers.push_back(new DataHandler);
fHandlers.push_back(new FaviconHandler);
}
~UrlManager() {
for (int i = 0; i < fHandlers.count(); i++) { delete fHandlers[i]; }
}
// This is clearly not efficient for a large number of urls and handlers
int invoke(Request* request, MHD_Connection* connection, const char* url, const char* method,
const char* upload_data, size_t* upload_data_size) const {
for (int i = 0; i < fHandlers.count(); i++) {
if (fHandlers[i]->canHandle(method, url)) {
return fHandlers[i]->handle(request, connection, url, method, upload_data,
upload_data_size);
}
}
return MHD_NO;
}
private:
SkTArray<UrlHandler*> fHandlers;
};
const UrlManager kUrlManager;
int answer_to_connection(void* cls, struct MHD_Connection* connection,
const char* url, const char* method, const char* version,
const char* upload_data, size_t* upload_data_size,
void** con_cls) {
SkDebugf("New %s request for %s using version %s\n", method, url, version);
Request* request = reinterpret_cast<Request*>(cls);
int result = kUrlManager.invoke(request, connection, url, method, upload_data,
upload_data_size);
if (MHD_NO == result) {
fprintf(stderr, "Invalid method and / or url: %s %s\n", method, url);
}
return result;
}
int skiaserve_main() {
Request request(SkString("/data")); // This simple server has one request
struct MHD_Daemon* daemon;
// TODO Add option to bind this strictly to an address, e.g. localhost, for security.
daemon = MHD_start_daemon(MHD_USE_SELECT_INTERNALLY, FLAGS_port, nullptr, nullptr,
&answer_to_connection, &request,
MHD_OPTION_END);
if (NULL == daemon) {
return 1;
}
getchar();
MHD_stop_daemon(daemon);
return 0;
}
#if !defined SK_BUILD_FOR_IOS
int main(int argc, char** argv) {
SkCommandLineFlags::Parse(argc, argv);
return skiaserve_main();
}
#endif