SkDebugger

/* * 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 #include #include "png.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( "\n" "\n" "\n" " SkDebugger\n" " \n" " \n" " \n" " \n" " \n" "\n" "\n" " This is the app." " \n" "\n" "", 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 fPicture; SkAutoTUnref fDebugCanvas; SkAutoTDelete fContextFactory; SkAutoTUnref fSurface; 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); return surface; } static void write_png_callback(png_structp png_ptr, png_bytep data, png_size_t length) { SkWStream* out = (SkWStream*) png_get_io_ptr(png_ptr); out->write(data, length); } static void write_png(const png_bytep rgba, png_uint_32 width, png_uint_32 height, SkWStream& out) { png_structp png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); SkASSERT(png != nullptr); png_infop info_ptr = png_create_info_struct(png); SkASSERT(info_ptr != nullptr); if (setjmp(png_jmpbuf(png))) { SkFAIL("png encode error"); } png_set_IHDR(png, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); png_set_compression_level(png, 1); png_bytepp rows = (png_bytepp) sk_malloc_throw(height * sizeof(png_byte*)); png_bytep pixels = (png_bytep) sk_malloc_throw(width * height * 3); for (png_size_t y = 0; y < height; ++y) { const png_bytep src = rgba + y * width * 4; rows[y] = pixels + y * width * 3; // convert from RGBA to RGB for (png_size_t x = 0; x < width; ++x) { rows[y][x * 3] = src[x * 4]; rows[y][x * 3 + 1] = src[x * 4 + 1]; rows[y][x * 3 + 2] = src[x * 4 + 2]; } } png_set_filter(png, 0, PNG_NO_FILTERS); png_set_rows(png, info_ptr, &rows[0]); png_set_write_fn(png, &out, write_png_callback, NULL); png_write_png(png, info_ptr, PNG_TRANSFORM_IDENTITY, NULL); png_destroy_write_struct(&png, NULL); sk_free(rows); } 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 SkDynamicMemoryWStream buffer; write_png((const png_bytep) bmp.getPixels(), bmp.width(), bmp.height(), buffer); return buffer.copyToData(); } SkCanvas* getCanvasFromRequest(Request* request) { GrContextFactory* factory = request->fContextFactory; SkGLContext* gl = factory->getContextInfo(GrContextFactory::kNative_GLContextType, GrContextFactory::kNone_GLContextOptions).fGLContext; gl->makeCurrent(); SkASSERT(request->fDebugCanvas); SkCanvas* target = request->fSurface->getCanvas(); return target; } SkData* setupAndDrawToCanvasReturnPng(Request* request, int n) { SkCanvas* target = getCanvasFromRequest(request); request->fDebugCanvas->drawTo(target, n); return writeCanvasToPng(target); } 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(cls); if (0 != size) { uc->fStream.write(data, size); } return MHD_YES; } // SendOK just sends an empty response with a 200 OK status code. static int SendOK(MHD_Connection* connection) { const char* data = ""; MHD_Response* response = MHD_create_response_from_buffer(strlen(data), (void*)data, MHD_RESPMEM_PERSISTENT); int ret = MHD_queue_response(connection, 200, response); MHD_destroy_response(response); return ret; } 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(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, SkCanvas* canvas, SkDebugCanvas* debugCanvas, UrlDataManager* urlDataManager, int n) { Json::Value root = debugCanvas->toJSON(*urlDataManager, n, canvas); SkDynamicMemoryWStream stream; stream.writeText(Json::FastWriter().write(root).c_str()); SkAutoTUnref 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(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 commands; SkStrSplit(url, "/", &commands); if (!request->fPicture.get() || commands.count() > 3) { return MHD_NO; } // /cmd or /cmd/N if (0 == strcmp(method, MHD_HTTP_METHOD_GET)) { int n; if (commands.count() == 1) { n = request->fDebugCanvas->getSize() - 1; } else { sscanf(commands[1].c_str(), "%d", &n); } return SendJSON(connection, getCanvasFromRequest(request), request->fDebugCanvas, &request->fUrlDataManager, 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 SendOK(connection); } // /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 SendOK(connection); } 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 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 data(setupAndDrawToCanvasReturnPng(request, n)); return SendData(connection, data, "image/png"); } }; /** Updates the clip visualization alpha. On all subsequent /img requests, the clip will be drawn in black with the specified alpha. 0 = no visible clip, 255 = fully opaque clip. */ class ClipAlphaHandler : public UrlHandler { public: bool canHandle(const char* method, const char* url) override { static const char* kBasePath = "/clipAlpha/"; return 0 == strcmp(method, MHD_HTTP_METHOD_POST) && 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 commands; SkStrSplit(url, "/", &commands); if (!request->fPicture.get() || commands.count() != 2) { return MHD_NO; } int alpha; sscanf(commands[1].c_str(), "%d", &alpha); request->fDebugCanvas->setClipVizColor(SkColorSetARGB(alpha, 0, 0, 0)); return SendOK(connection); } }; 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; } // create surface GrContextOptions grContextOpts; request->fContextFactory.reset(new GrContextFactory(grContextOpts)); request->fSurface.reset(setupSurface(request->fContextFactory.get())); // 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 picture(recorder.endRecording()); SkDynamicMemoryWStream outStream; SkAutoTUnref serializer(SkImageEncoder::CreatePixelSerializer()); picture->serialize(&outStream, serializer); SkAutoTUnref 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 commands; SkStrSplit(url, "/", &commands); if (!request->fPicture.get() || commands.count() > 2) { return MHD_NO; } // drawTo SkAutoTUnref 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 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 commands; SkStrSplit(url, "/", &commands); if (!request->fPicture.get() || commands.count() != 2) { return MHD_NO; } SkAutoTUnref 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 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 ClipAlphaHandler); 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 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(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