encode.cpp 2.4 KB

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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. #include "gm/gm.h"
  8. #include "include/core/SkBitmap.h"
  9. #include "include/core/SkCanvas.h"
  10. #include "include/core/SkData.h"
  11. #include "include/core/SkEncodedImageFormat.h"
  12. #include "include/core/SkFont.h"
  13. #include "include/core/SkImage.h"
  14. #include "include/core/SkImageEncoder.h"
  15. #include "include/core/SkPaint.h"
  16. #include "include/core/SkRefCnt.h"
  17. #include "include/core/SkSize.h"
  18. #include "include/core/SkString.h"
  19. #include "tools/Resources.h"
  20. namespace skiagm {
  21. class EncodeGM : public GM {
  22. public:
  23. EncodeGM() {}
  24. protected:
  25. SkString onShortName() override {
  26. return SkString("encode");
  27. }
  28. SkISize onISize() override {
  29. return SkISize::Make(1024, 600);
  30. }
  31. void onDraw(SkCanvas* canvas) override {
  32. SkBitmap orig;
  33. GetResourceAsBitmap("images/mandrill_512_q075.jpg", &orig);
  34. auto pngData = SkEncodeBitmap(orig, SkEncodedImageFormat::kPNG, 100);
  35. auto jpgData = SkEncodeBitmap(orig, SkEncodedImageFormat::kJPEG, 100);
  36. sk_sp<SkImage> pngImage = SkImage::MakeFromEncoded(pngData);
  37. sk_sp<SkImage> jpgImage = SkImage::MakeFromEncoded(jpgData);
  38. canvas->drawImage(pngImage.get(), 0.0f, 0.0f);
  39. canvas->drawImage(jpgImage.get(), 512.0f, 0.0f);
  40. SkFont font;
  41. font.setEdging(SkFont::Edging::kAlias);
  42. canvas->drawString("Images should look identical.", 450.0f, 550.0f, font, SkPaint());
  43. }
  44. private:
  45. typedef GM INHERITED;
  46. };
  47. DEF_GM( return new EncodeGM; )
  48. }
  49. ///////////
  50. #if 0
  51. DEF_SIMPLE_GM(jpeg_orientation, canvas, 1000, 1000) {
  52. static sk_sp<SkImage> imgs[8];
  53. if (!imgs[0]) {
  54. for (int i = 0; i < 8; ++i) {
  55. SkString path;
  56. path.printf("/skia/orientation/Landscape_%d.jpg", i + 1);
  57. auto stream = SkStream::MakeFromFile(path.c_str());
  58. auto data = SkData::MakeFromStream(stream.get(), stream->getLength());
  59. imgs[i] = SkImage::MakeFromEncoded(data, nullptr);
  60. }
  61. }
  62. canvas->scale(0.25, 0.25);
  63. for (int i = 0; i < 8; ++i) {
  64. SkImage* img = imgs[i].get();
  65. canvas->drawImage(img, 0, 0, nullptr);
  66. canvas->translate(0, img->height());
  67. if (i == 3) {
  68. canvas->translate(img->width(), -4*img->height());
  69. }
  70. }
  71. }
  72. #endif