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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include <limits.h> | 7 #include <limits.h> |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 | 10 |
11 #include "core/fxge/dib/dib_int.h" | 11 #include "core/fxge/dib/dib_int.h" |
12 #include "core/fxge/fx_dib.h" | 12 #include "core/fxge/fx_dib.h" |
| 13 #include "third_party/base/ptr_util.h" |
13 | 14 |
14 namespace { | 15 namespace { |
15 | 16 |
16 bool SourceSizeWithinLimit(int width, int height) { | 17 bool SourceSizeWithinLimit(int width, int height) { |
17 const int kMaxProgressiveStretchPixels = 1000000; | 18 const int kMaxProgressiveStretchPixels = 1000000; |
18 return !height || width < kMaxProgressiveStretchPixels / height; | 19 return !height || width < kMaxProgressiveStretchPixels / height; |
19 } | 20 } |
20 | 21 |
21 FXDIB_Format GetStretchedFormat(const CFX_DIBSource& src) { | 22 FXDIB_Format GetStretchedFormat(const CFX_DIBSource& src) { |
22 FXDIB_Format format = src.GetFormat(); | 23 FXDIB_Format format = src.GetFormat(); |
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923 return StartStretch(); | 924 return StartStretch(); |
924 } | 925 } |
925 | 926 |
926 FX_BOOL CFX_ImageStretcher::Continue(IFX_Pause* pPause) { | 927 FX_BOOL CFX_ImageStretcher::Continue(IFX_Pause* pPause) { |
927 if (m_Flags & FXDIB_DOWNSAMPLE) | 928 if (m_Flags & FXDIB_DOWNSAMPLE) |
928 return ContinueQuickStretch(pPause); | 929 return ContinueQuickStretch(pPause); |
929 return ContinueStretch(pPause); | 930 return ContinueStretch(pPause); |
930 } | 931 } |
931 | 932 |
932 FX_BOOL CFX_ImageStretcher::StartStretch() { | 933 FX_BOOL CFX_ImageStretcher::StartStretch() { |
933 m_pStretchEngine = WrapUnique( | 934 m_pStretchEngine = pdfium::MakeUnique<CStretchEngine>( |
934 new CStretchEngine(m_pDest, m_DestFormat, m_DestWidth, m_DestHeight, | 935 m_pDest, m_DestFormat, m_DestWidth, m_DestHeight, m_ClipRect, m_pSource, |
935 m_ClipRect, m_pSource, m_Flags)); | 936 m_Flags); |
936 m_pStretchEngine->StartStretchHorz(); | 937 m_pStretchEngine->StartStretchHorz(); |
937 if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) { | 938 if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) { |
938 m_pStretchEngine->Continue(nullptr); | 939 m_pStretchEngine->Continue(nullptr); |
939 return FALSE; | 940 return FALSE; |
940 } | 941 } |
941 return TRUE; | 942 return TRUE; |
942 } | 943 } |
943 | 944 |
944 FX_BOOL CFX_ImageStretcher::ContinueStretch(IFX_Pause* pPause) { | 945 FX_BOOL CFX_ImageStretcher::ContinueStretch(IFX_Pause* pPause) { |
945 return m_pStretchEngine && m_pStretchEngine->Continue(pPause); | 946 return m_pStretchEngine && m_pStretchEngine->Continue(pPause); |
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998 result_width); | 999 result_width); |
999 if (m_pMaskScanline) { | 1000 if (m_pMaskScanline) { |
1000 m_pSource->m_pAlphaMask->DownSampleScanline( | 1001 m_pSource->m_pAlphaMask->DownSampleScanline( |
1001 src_y, m_pMaskScanline.get(), 1, m_DestWidth, m_bFlipX, | 1002 src_y, m_pMaskScanline.get(), 1, m_DestWidth, m_bFlipX, |
1002 m_ClipRect.left, result_width); | 1003 m_ClipRect.left, result_width); |
1003 } | 1004 } |
1004 m_pDest->ComposeScanline(dest_y, m_pScanline.get(), m_pMaskScanline.get()); | 1005 m_pDest->ComposeScanline(dest_y, m_pScanline.get(), m_pMaskScanline.get()); |
1005 } | 1006 } |
1006 return FALSE; | 1007 return FALSE; |
1007 } | 1008 } |
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