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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 "SkForceLinking.h"
     13 #include "SkGraphics.h"
     14 #include "SkSurface.h"
     15 #include "SkImage.h"
     16 #include "SkStream.h"
     17 #include "SkString.h"
     18 
     19 __SK_FORCE_IMAGE_DECODER_LINKING;
     20 
     21 DEFINE_string2(outFile, o, "skhello", "The filename to write the image.");
     22 DEFINE_string2(text, t, "Hello", "The string to write.");
     23 
     24 static void doDraw(SkCanvas* canvas, const SkPaint& paint, const char text[]) {
     25     SkRect bounds;
     26     canvas->getClipBounds(&bounds);
     27 
     28     canvas->drawColor(SK_ColorWHITE);
     29     canvas->drawText(text, strlen(text),
     30                      bounds.centerX(), bounds.centerY(),
     31                      paint);
     32 }
     33 
     34 static bool do_surface(int w, int h, const char path[], const char text[],
     35                        const SkPaint& paint) {
     36     SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterPMColor(w, h));
     37     doDraw(surface->getCanvas(), paint, text);
     38 
     39     SkAutoTUnref<SkImage> image(surface->newImageSnapshot());
     40     SkAutoDataUnref data(image->encode());
     41     if (NULL == data.get()) {
     42         return false;
     43     }
     44     SkFILEWStream stream(path);
     45     return stream.write(data->data(), data->size());
     46 }
     47 
     48 static bool do_document(int w, int h, const char path[], const char text[],
     49                         const SkPaint& paint) {
     50     SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(path));
     51     if (doc.get()) {
     52         SkScalar width = SkIntToScalar(w);
     53         SkScalar height = SkIntToScalar(h);
     54         doDraw(doc->beginPage(width, height, NULL), paint, text);
     55         return true;
     56     }
     57     return false;
     58 }
     59 
     60 int tool_main(int argc, char** argv);
     61 int tool_main(int argc, char** argv) {
     62     SkCommandLineFlags::SetUsage("");
     63     SkCommandLineFlags::Parse(argc, argv);
     64 
     65     SkAutoGraphics ag;
     66     SkString path("skhello");
     67     SkString text("Hello");
     68 
     69     if (!FLAGS_outFile.isEmpty()) {
     70         path.set(FLAGS_outFile[0]);
     71     }
     72     if (!FLAGS_text.isEmpty()) {
     73         text.set(FLAGS_text[0]);
     74     }
     75 
     76     SkPaint paint;
     77     paint.setAntiAlias(true);
     78     paint.setTextSize(SkIntToScalar(30));
     79     paint.setTextAlign(SkPaint::kCenter_Align);
     80 
     81     SkScalar width = paint.measureText(text.c_str(), text.size());
     82     SkScalar spacing = paint.getFontSpacing();
     83 
     84     int w = SkScalarRoundToInt(width) + 30;
     85     int h = SkScalarRoundToInt(spacing) + 30;
     86 
     87     static const struct {
     88         bool (*fProc)(int w, int h, const char path[], const char text[],
     89                       const SkPaint&);
     90         const char* fSuffix;
     91     } gRec[] = {
     92         { do_surface, ".png" },
     93         { do_document, ".pdf" },
     94     };
     95 
     96     for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
     97         SkString file;
     98         file.printf("%s%s", path.c_str(), gRec[i].fSuffix);
     99         if (!gRec[i].fProc(w, h, file.c_str(), text.c_str(), paint)) {
    100             return -1;
    101         }
    102     }
    103     return 0;
    104 }
    105 
    106 #if !defined SK_BUILD_FOR_IOS
    107 int main(int argc, char * const argv[]) {
    108     return tool_main(argc, (char**) argv);
    109 }
    110 #endif
    111