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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 
doDraw(SkCanvas * canvas,const SkPaint & paint,const char text[])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 
do_surface(int w,int h,const char path[],const char text[],const SkPaint & paint)34 static bool do_surface(int w, int h, const char path[], const char text[],
35                        const SkPaint& paint) {
36     SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
37     SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(w, h, &props));
38     doDraw(surface->getCanvas(), paint, text);
39 
40     SkAutoTUnref<SkImage> image(surface->newImageSnapshot());
41     SkAutoDataUnref data(image->encode());
42     if (nullptr == data.get()) {
43         return false;
44     }
45     SkFILEWStream stream(path);
46     return stream.write(data->data(), data->size());
47 }
48 
do_document(int w,int h,const char path[],const char text[],const SkPaint & paint)49 static bool do_document(int w, int h, const char path[], const char text[],
50                         const SkPaint& paint) {
51     SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(path));
52     if (doc.get()) {
53         SkScalar width = SkIntToScalar(w);
54         SkScalar height = SkIntToScalar(h);
55         doDraw(doc->beginPage(width, height, nullptr), paint, text);
56         return true;
57     }
58     return false;
59 }
60 
61 int tool_main(int argc, char** argv);
tool_main(int argc,char ** argv)62 int tool_main(int argc, char** argv) {
63     SkCommandLineFlags::SetUsage("");
64     SkCommandLineFlags::Parse(argc, argv);
65 
66     SkAutoGraphics ag;
67     SkString path("skhello");
68     SkString text("Hello");
69 
70     if (!FLAGS_outFile.isEmpty()) {
71         path.set(FLAGS_outFile[0]);
72     }
73     if (!FLAGS_text.isEmpty()) {
74         text.set(FLAGS_text[0]);
75     }
76 
77     SkPaint paint;
78     paint.setAntiAlias(true);
79     paint.setTextSize(SkIntToScalar(30));
80     paint.setTextAlign(SkPaint::kCenter_Align);
81 
82     SkScalar width = paint.measureText(text.c_str(), text.size());
83     SkScalar spacing = paint.getFontSpacing();
84 
85     int w = SkScalarRoundToInt(width) + 30;
86     int h = SkScalarRoundToInt(spacing) + 30;
87 
88     static const struct {
89         bool (*fProc)(int w, int h, const char path[], const char text[],
90                       const SkPaint&);
91         const char* fSuffix;
92     } gRec[] = {
93         { do_surface, ".png" },
94         { do_document, ".pdf" },
95     };
96 
97     for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
98         SkString file;
99         file.printf("%s%s", path.c_str(), gRec[i].fSuffix);
100         if (!gRec[i].fProc(w, h, file.c_str(), text.c_str(), paint)) {
101             return -1;
102         }
103     }
104     return 0;
105 }
106 
107 #if !defined SK_BUILD_FOR_IOS
main(int argc,char * const argv[])108 int main(int argc, char * const argv[]) {
109     return tool_main(argc, (char**) argv);
110 }
111 #endif
112