1 /*
2  * Copyright 2012 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 "gm.h"
9 
10 #include "Resources.h"
11 #include "SkCanvas.h"
12 #include "SkImageDecoder.h"
13 #include "SkStream.h"
14 
15 namespace skiagm {
16 
17 /** Draw a CMYK encoded jpeg - libjpeg doesn't support CMYK->RGB
18     conversion so this tests Skia's internal processing
19 */
20 class CMYKJpegGM : public GM {
21 public:
CMYKJpegGM()22     CMYKJpegGM() {}
23 
24 protected:
onOnceBeforeDraw()25     void onOnceBeforeDraw() override {
26         // parameters to the "decode" call
27         bool dither = false;
28 
29         SkString jpgFilename = GetResourcePath("CMYK.jpg");
30         SkFILEStream stream(jpgFilename.c_str());
31         if (!stream.isValid()) {
32             SkDebugf("Could not find CMYK.jpg, please set --resourcePath correctly.\n");
33             return;
34         }
35 
36         SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
37         if (codec) {
38             stream.rewind();
39             codec->setDitherImage(dither);
40             codec->decode(&stream, &fBitmap, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
41             SkDELETE(codec);
42         }
43     }
44 
onShortName()45     virtual SkString onShortName() override {
46         return SkString("cmykjpeg");
47     }
48 
onISize()49     virtual SkISize onISize() override {
50         return SkISize::Make(640, 480);
51     }
52 
onDraw(SkCanvas * canvas)53     virtual void onDraw(SkCanvas* canvas) override {
54 
55         canvas->translate(20*SK_Scalar1, 20*SK_Scalar1);
56         canvas->drawBitmap(fBitmap, 0, 0);
57     }
58 
59 private:
60     SkBitmap fBitmap;
61 
62     typedef GM INHERITED;
63 };
64 
65 //////////////////////////////////////////////////////////////////////////////
66 
MyFactory(void *)67 static GM* MyFactory(void*) { return new CMYKJpegGM; }
68 static GMRegistry reg(MyFactory);
69 
70 }
71