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      1 /*
      2  * Copyright 2011 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 "SkCanvas.h"
      9 #include "SkCommandLineFlags.h"
     10 #include "SkData.h"
     11 #include "SkDocument.h"
     12 #include "SkGraphics.h"
     13 #include "SkSurface.h"
     14 #include "SkImage.h"
     15 #include "SkStream.h"
     16 #include "SkString.h"
     17 
     18 DEFINE_string2(outFile, o, "skhello", "The filename to write the image.");
     19 DEFINE_string2(text, t, "Hello", "The string to write.");
     20 
     21 static void doDraw(SkCanvas* canvas, const SkPaint& paint, const char text[]) {
     22     SkRect bounds = canvas->getLocalClipBounds();
     23 
     24     canvas->drawColor(SK_ColorWHITE);
     25     canvas->drawText(text, strlen(text),
     26                      bounds.centerX(), bounds.centerY(),
     27                      paint);
     28 }
     29 
     30 static bool do_surface(int w, int h, const char path[], const char text[],
     31                        const SkPaint& paint) {
     32     SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
     33     sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(w, h, &props));
     34     doDraw(surface->getCanvas(), paint, text);
     35 
     36     sk_sp<SkImage> image(surface->makeImageSnapshot());
     37     sk_sp<SkData> data(image->encode());
     38     if (!data) {
     39         return false;
     40     }
     41     SkFILEWStream stream(path);
     42     return stream.write(data->data(), data->size());
     43 }
     44 
     45 static bool do_document(int w, int h, const char path[], const char text[],
     46                         const SkPaint& paint) {
     47     sk_sp<SkDocument> doc(SkDocument::MakePDF(path));
     48     if (doc.get()) {
     49         SkScalar width = SkIntToScalar(w);
     50         SkScalar height = SkIntToScalar(h);
     51         doDraw(doc->beginPage(width, height, nullptr), paint, text);
     52         return true;
     53     }
     54     return false;
     55 }
     56 
     57 int main(int argc, char** argv) {
     58     SkCommandLineFlags::SetUsage("");
     59     SkCommandLineFlags::Parse(argc, argv);
     60 
     61     SkAutoGraphics ag;
     62     SkString path("skhello");
     63     SkString text("Hello");
     64 
     65     if (!FLAGS_outFile.isEmpty()) {
     66         path.set(FLAGS_outFile[0]);
     67     }
     68     if (!FLAGS_text.isEmpty()) {
     69         text.set(FLAGS_text[0]);
     70     }
     71 
     72     SkPaint paint;
     73     paint.setAntiAlias(true);
     74     paint.setTextSize(SkIntToScalar(30));
     75     paint.setTextAlign(SkPaint::kCenter_Align);
     76 
     77     SkScalar width = paint.measureText(text.c_str(), text.size());
     78     SkScalar spacing = paint.getFontSpacing();
     79 
     80     int w = SkScalarRoundToInt(width) + 30;
     81     int h = SkScalarRoundToInt(spacing) + 30;
     82 
     83     static const struct {
     84         bool (*fProc)(int w, int h, const char path[], const char text[],
     85                       const SkPaint&);
     86         const char* fSuffix;
     87     } gRec[] = {
     88         { do_surface, ".png" },
     89         { do_document, ".pdf" },
     90     };
     91 
     92     for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
     93         SkString file;
     94         file.printf("%s%s", path.c_str(), gRec[i].fSuffix);
     95         if (!gRec[i].fProc(w, h, file.c_str(), text.c_str(), paint)) {
     96             return -1;
     97         }
     98     }
     99     return 0;
    100 }
    101