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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 "../../../include/fxge/fx_dib.h" | 7 #include "../../../include/fxge/fx_dib.h" |
8 #include "../../../include/fxge/fx_ge.h" | 8 #include "../../../include/fxge/fx_ge.h" |
9 #include "dib_int.h" | 9 #include "dib_int.h" |
10 #include <limits.h> | 10 #include <limits.h> |
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21 base = (FX_FLOAT)(src_len); | 21 base = (FX_FLOAT)(src_len); |
22 } else { | 22 } else { |
23 base = 0; | 23 base = 0; |
24 } | 24 } |
25 int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1; | 25 int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1; |
26 m_ItemSize = sizeof(int) * 2 + (int)(sizeof(int) * (FXSYS_ceil(FXSYS_fabs((F
X_FLOAT)scale)) + ext_size)); | 26 m_ItemSize = sizeof(int) * 2 + (int)(sizeof(int) * (FXSYS_ceil(FXSYS_fabs((F
X_FLOAT)scale)) + ext_size)); |
27 m_DestMin = dest_min; | 27 m_DestMin = dest_min; |
28 if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize) { | 28 if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize) { |
29 return; | 29 return; |
30 } | 30 } |
31 m_pWeightTables = FX_AllocNL(FX_BYTE, (dest_max - dest_min) * m_ItemSize + 4
); | 31 m_pWeightTables = FX_TryAlloc(FX_BYTE, (dest_max - dest_min) * m_ItemSize +
4); |
32 if (m_pWeightTables == NULL) { | 32 if (m_pWeightTables == NULL) { |
33 return; | 33 return; |
34 } | 34 } |
35 if ((flags & FXDIB_NOSMOOTH) != 0 || FXSYS_fabs((FX_FLOAT)scale) < 1.0f) { | 35 if ((flags & FXDIB_NOSMOOTH) != 0 || FXSYS_fabs((FX_FLOAT)scale) < 1.0f) { |
36 for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) { | 36 for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) { |
37 PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel); | 37 PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel); |
38 double src_pos = dest_pixel * scale + scale / 2 + base; | 38 double src_pos = dest_pixel * scale + scale / 2 + base; |
39 if (flags & FXDIB_INTERPOL) { | 39 if (flags & FXDIB_INTERPOL) { |
40 pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos -
1.0f / 2); | 40 pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos -
1.0f / 2); |
41 pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.
0f / 2); | 41 pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.
0f / 2); |
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195 FX_DWORD size = clip_rect.Width(); | 195 FX_DWORD size = clip_rect.Width(); |
196 if (size && m_DestBpp > (int)(INT_MAX / size)) { | 196 if (size && m_DestBpp > (int)(INT_MAX / size)) { |
197 return; | 197 return; |
198 } | 198 } |
199 size *= m_DestBpp; | 199 size *= m_DestBpp; |
200 if (size > INT_MAX - 31) { | 200 if (size > INT_MAX - 31) { |
201 return; | 201 return; |
202 } | 202 } |
203 size += 31; | 203 size += 31; |
204 size = size / 32 * 4; | 204 size = size / 32 * 4; |
205 m_pDestScanline = FX_AllocNL(FX_BYTE, size); | 205 m_pDestScanline = FX_TryAlloc(FX_BYTE, size); |
206 if (m_pDestScanline == NULL) { | 206 if (m_pDestScanline == NULL) { |
207 return; | 207 return; |
208 } | 208 } |
209 if (dest_format == FXDIB_Rgb32) { | 209 if (dest_format == FXDIB_Rgb32) { |
210 FXSYS_memset8(m_pDestScanline, 255, size); | 210 FXSYS_memset8(m_pDestScanline, 255, size); |
211 } | 211 } |
212 m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4; | 212 m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4; |
213 m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4; | 213 m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4; |
214 m_pInterBuf = NULL; | 214 m_pInterBuf = NULL; |
215 m_pSource = pSrcBitmap; | 215 m_pSource = pSrcBitmap; |
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304 } | 304 } |
305 if (m_pDestMaskScanline) { | 305 if (m_pDestMaskScanline) { |
306 FX_Free(m_pDestMaskScanline); | 306 FX_Free(m_pDestMaskScanline); |
307 } | 307 } |
308 } | 308 } |
309 FX_BOOL CStretchEngine::StartStretchHorz() | 309 FX_BOOL CStretchEngine::StartStretchHorz() |
310 { | 310 { |
311 if (m_DestWidth == 0 || m_pDestScanline == NULL || m_SrcClip.Height() > (int
)((1U << 29) / m_InterPitch) || m_SrcClip.Height() == 0) { | 311 if (m_DestWidth == 0 || m_pDestScanline == NULL || m_SrcClip.Height() > (int
)((1U << 29) / m_InterPitch) || m_SrcClip.Height() == 0) { |
312 return FALSE; | 312 return FALSE; |
313 } | 313 } |
314 m_pInterBuf = FX_AllocNL(unsigned char, m_SrcClip.Height() * m_InterPitch); | 314 m_pInterBuf = FX_TryAlloc(unsigned char, m_SrcClip.Height() * m_InterPitch); |
315 if (m_pInterBuf == NULL) { | 315 if (m_pInterBuf == NULL) { |
316 return FALSE; | 316 return FALSE; |
317 } | 317 } |
318 if (m_pSource && m_bHasAlpha && m_pSource->m_pAlphaMask) { | 318 if (m_pSource && m_bHasAlpha && m_pSource->m_pAlphaMask) { |
319 m_pExtraAlphaBuf = FX_Alloc(unsigned char, m_SrcClip.Height() * m_ExtraM
askPitch); | 319 m_pExtraAlphaBuf = FX_Alloc(unsigned char, m_SrcClip.Height() * m_ExtraM
askPitch); |
320 if (!m_pExtraAlphaBuf) { | 320 if (!m_pExtraAlphaBuf) { |
321 return FALSE; | 321 return FALSE; |
322 } | 322 } |
323 FX_DWORD size = (m_DestClip.Width() * 8 + 31) / 32 * 4; | 323 FX_DWORD size = (m_DestClip.Width() * 8 + 31) / 32 * 4; |
324 m_pDestMaskScanline = FX_AllocNL(unsigned char, size); | 324 m_pDestMaskScanline = FX_TryAlloc(unsigned char, size); |
325 if (!m_pDestMaskScanline) { | 325 if (!m_pDestMaskScanline) { |
326 return FALSE; | 326 return FALSE; |
327 } | 327 } |
328 } | 328 } |
329 m_WeightTable.Calc(m_DestWidth, m_DestClip.left, m_DestClip.right, m_SrcWidt
h, m_SrcClip.left, m_SrcClip.right, m_Flags); | 329 m_WeightTable.Calc(m_DestWidth, m_DestClip.left, m_DestClip.right, m_SrcWidt
h, m_SrcClip.left, m_SrcClip.right, m_Flags); |
330 if (m_WeightTable.m_pWeightTables == NULL) { | 330 if (m_WeightTable.m_pWeightTables == NULL) { |
331 return FALSE; | 331 return FALSE; |
332 } | 332 } |
333 m_CurRow = m_SrcClip.top; | 333 m_CurRow = m_SrcClip.top; |
334 m_State = 1; | 334 m_State = 1; |
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840 return TRUE; | 840 return TRUE; |
841 } | 841 } |
842 m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth
, m_bFlipX, m_ClipRect.left, result_width); | 842 m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth
, m_bFlipX, m_ClipRect.left, result_width); |
843 if (m_pMaskScanline) { | 843 if (m_pMaskScanline) { |
844 m_pSource->m_pAlphaMask->DownSampleScanline(src_y, m_pMaskScanline,
1, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width); | 844 m_pSource->m_pAlphaMask->DownSampleScanline(src_y, m_pMaskScanline,
1, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width); |
845 } | 845 } |
846 m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline); | 846 m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline); |
847 } | 847 } |
848 return FALSE; | 848 return FALSE; |
849 } | 849 } |
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