src/codec/SkGifInterlaceIter.h - Issue 1305123002: Scanline decoding for gifs

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Side by Side Diff: src/codec/SkGifInterlaceIter.h

Issue 1305123002: Scanline decoding for gifs (Closed) Base URL: https://skia.googlesource.com/skia.git@real-bmp-scan

Patch Set: First round of fixes Created 5 years, 4 months ago

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1 /*

2 * Copyright 2015 The Android Open Source Project

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 "SkTypes.h"

9

10 /*

11 * Helper class to determine the destination y-values for interlaced gifs

12 */

13 class SkGifInterlaceIter : SkNoncopyable {

14 public:

15

16 explicit SkGifInterlaceIter(int32_t height);

17

18 /*

19 * Get the next destination y-value

20 */

21 int32_t nextY();

22

23 private:

24

25 /*

26 * Updates the iterator to prepare the next y-value

27 */

28 void prepareY();

29

30 const int32_t fHeight;

31 int32_t fCurrY;

32 int32_t fDeltaY;

33 const uint8_t* fStartYPtr;

34 const uint8_t* fDeltaYPtr;

35 };

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