| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fxcodec/jbig2/JBig2_Image.h" |
| |
| #include <limits.h> |
| #include <string.h> |
| |
| #include <algorithm> |
| #include <memory> |
| |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "third_party/base/check.h" |
| |
| #define JBIG2_GETDWORD(buf) \ |
| ((static_cast<uint32_t>((buf)[0]) << 24) | \ |
| (static_cast<uint32_t>((buf)[1]) << 16) | \ |
| (static_cast<uint32_t>((buf)[2]) << 8) | \ |
| (static_cast<uint32_t>((buf)[3]) << 0)) |
| |
| #define JBIG2_PUTDWORD(buf, val) \ |
| ((buf)[0] = static_cast<uint8_t>((val) >> 24), \ |
| (buf)[1] = static_cast<uint8_t>((val) >> 16), \ |
| (buf)[2] = static_cast<uint8_t>((val) >> 8), \ |
| (buf)[3] = static_cast<uint8_t>((val) >> 0)) |
| |
| namespace { |
| |
| const int kMaxImagePixels = INT_MAX - 31; |
| const int kMaxImageBytes = kMaxImagePixels / 8; |
| |
| int BitIndexToByte(int index) { |
| return index / 8; |
| } |
| |
| int BitIndexToAlignedByte(int index) { |
| return index / 32 * 4; |
| } |
| |
| } // namespace |
| |
| CJBig2_Image::CJBig2_Image(int32_t w, int32_t h) { |
| if (w <= 0 || h <= 0 || w > kMaxImagePixels) |
| return; |
| |
| int32_t stride_pixels = FxAlignToBoundary<32>(w); |
| if (h > kMaxImagePixels / stride_pixels) |
| return; |
| |
| m_nWidth = w; |
| m_nHeight = h; |
| m_nStride = stride_pixels / 8; |
| m_pData.Reset(std::unique_ptr<uint8_t, FxFreeDeleter>( |
| FX_Alloc2D(uint8_t, m_nStride, m_nHeight))); |
| } |
| |
| CJBig2_Image::CJBig2_Image(int32_t w, |
| int32_t h, |
| int32_t stride, |
| uint8_t* pBuf) { |
| if (w < 0 || h < 0) |
| return; |
| |
| // Stride must be word-aligned. |
| if (stride < 0 || stride > kMaxImageBytes || stride % 4 != 0) |
| return; |
| |
| int32_t stride_pixels = 8 * stride; |
| if (stride_pixels < w || h > kMaxImagePixels / stride_pixels) |
| return; |
| |
| m_nWidth = w; |
| m_nHeight = h; |
| m_nStride = stride; |
| m_pData.Reset(pBuf); |
| } |
| |
| CJBig2_Image::CJBig2_Image(const CJBig2_Image& other) |
| : m_nWidth(other.m_nWidth), |
| m_nHeight(other.m_nHeight), |
| m_nStride(other.m_nStride) { |
| if (other.m_pData) { |
| m_pData.Reset(std::unique_ptr<uint8_t, FxFreeDeleter>( |
| FX_Alloc2D(uint8_t, m_nStride, m_nHeight))); |
| memcpy(data(), other.data(), m_nStride * m_nHeight); |
| } |
| } |
| |
| CJBig2_Image::~CJBig2_Image() = default; |
| |
| // static |
| bool CJBig2_Image::IsValidImageSize(int32_t w, int32_t h) { |
| return w > 0 && w <= JBIG2_MAX_IMAGE_SIZE && h > 0 && |
| h <= JBIG2_MAX_IMAGE_SIZE; |
| } |
| |
| int CJBig2_Image::GetPixel(int32_t x, int32_t y) const { |
| if (!m_pData) |
| return 0; |
| |
| if (x < 0 || x >= m_nWidth) |
| return 0; |
| |
| const uint8_t* pLine = GetLine(y); |
| if (!pLine) |
| return 0; |
| |
| int32_t m = BitIndexToByte(x); |
| int32_t n = x & 7; |
| return ((pLine[m] >> (7 - n)) & 1); |
| } |
| |
| void CJBig2_Image::SetPixel(int32_t x, int32_t y, int v) { |
| if (!m_pData) |
| return; |
| |
| if (x < 0 || x >= m_nWidth) |
| return; |
| |
| uint8_t* pLine = GetLine(y); |
| if (!pLine) |
| return; |
| |
| int32_t m = BitIndexToByte(x); |
| int32_t n = 1 << (7 - (x & 7)); |
| if (v) |
| pLine[m] |= n; |
| else |
| pLine[m] &= ~n; |
| } |
| |
| void CJBig2_Image::CopyLine(int32_t hTo, int32_t hFrom) { |
| if (!m_pData) |
| return; |
| |
| uint8_t* pDst = GetLine(hTo); |
| if (!pDst) |
| return; |
| |
| const uint8_t* pSrc = GetLine(hFrom); |
| if (!pSrc) { |
| memset(pDst, 0, m_nStride); |
| return; |
| } |
| memcpy(pDst, pSrc, m_nStride); |
| } |
| |
| void CJBig2_Image::Fill(bool v) { |
| if (!m_pData) |
| return; |
| |
| memset(data(), v ? 0xff : 0, m_nStride * m_nHeight); |
| } |
| |
| bool CJBig2_Image::ComposeTo(CJBig2_Image* pDst, |
| int32_t x, |
| int32_t y, |
| JBig2ComposeOp op) { |
| return m_pData && |
| ComposeToInternal(pDst, x, y, op, FX_RECT(0, 0, m_nWidth, m_nHeight)); |
| } |
| |
| bool CJBig2_Image::ComposeToWithRect(CJBig2_Image* pDst, |
| int32_t x, |
| int32_t y, |
| const FX_RECT& rtSrc, |
| JBig2ComposeOp op) { |
| return m_pData && ComposeToInternal(pDst, x, y, op, rtSrc); |
| } |
| |
| bool CJBig2_Image::ComposeFrom(int32_t x, |
| int32_t y, |
| CJBig2_Image* pSrc, |
| JBig2ComposeOp op) { |
| return m_pData && pSrc->ComposeTo(this, x, y, op); |
| } |
| |
| bool CJBig2_Image::ComposeFromWithRect(int32_t x, |
| int32_t y, |
| CJBig2_Image* pSrc, |
| const FX_RECT& rtSrc, |
| JBig2ComposeOp op) { |
| return m_pData && pSrc->ComposeToWithRect(this, x, y, rtSrc, op); |
| } |
| |
| std::unique_ptr<CJBig2_Image> CJBig2_Image::SubImage(int32_t x, |
| int32_t y, |
| int32_t w, |
| int32_t h) { |
| auto pImage = std::make_unique<CJBig2_Image>(w, h); |
| if (!pImage->data() || !m_pData) |
| return pImage; |
| |
| if (x < 0 || x >= m_nWidth || y < 0 || y >= m_nHeight) |
| return pImage; |
| |
| // Fast case when byte-aligned, normal slow case otherwise. |
| if ((x & 7) == 0) |
| SubImageFast(x, y, w, h, pImage.get()); |
| else |
| SubImageSlow(x, y, w, h, pImage.get()); |
| |
| return pImage; |
| } |
| |
| void CJBig2_Image::SubImageFast(int32_t x, |
| int32_t y, |
| int32_t w, |
| int32_t h, |
| CJBig2_Image* pImage) { |
| int32_t m = BitIndexToByte(x); |
| int32_t bytes_to_copy = std::min(pImage->m_nStride, m_nStride - m); |
| int32_t lines_to_copy = std::min(pImage->m_nHeight, m_nHeight - y); |
| for (int32_t j = 0; j < lines_to_copy; j++) |
| memcpy(pImage->GetLineUnsafe(j), GetLineUnsafe(y + j) + m, bytes_to_copy); |
| } |
| |
| void CJBig2_Image::SubImageSlow(int32_t x, |
| int32_t y, |
| int32_t w, |
| int32_t h, |
| CJBig2_Image* pImage) { |
| int32_t m = BitIndexToAlignedByte(x); |
| int32_t n = x & 31; |
| int32_t bytes_to_copy = std::min(pImage->m_nStride, m_nStride - m); |
| int32_t lines_to_copy = std::min(pImage->m_nHeight, m_nHeight - y); |
| for (int32_t j = 0; j < lines_to_copy; j++) { |
| const uint8_t* pLineSrc = GetLineUnsafe(y + j); |
| uint8_t* pLineDst = pImage->GetLineUnsafe(j); |
| const uint8_t* pSrc = pLineSrc + m; |
| const uint8_t* pSrcEnd = pLineSrc + m_nStride; |
| uint8_t* pDstEnd = pLineDst + bytes_to_copy; |
| for (uint8_t* pDst = pLineDst; pDst < pDstEnd; pSrc += 4, pDst += 4) { |
| uint32_t wTmp = JBIG2_GETDWORD(pSrc) << n; |
| if (pSrc + 4 < pSrcEnd) |
| wTmp |= (JBIG2_GETDWORD(pSrc + 4) >> (32 - n)); |
| JBIG2_PUTDWORD(pDst, wTmp); |
| } |
| } |
| } |
| |
| void CJBig2_Image::Expand(int32_t h, bool v) { |
| if (!m_pData || h <= m_nHeight || h > kMaxImageBytes / m_nStride) |
| return; |
| |
| if (m_pData.IsOwned()) { |
| m_pData.Reset(std::unique_ptr<uint8_t, FxFreeDeleter>(FX_Realloc( |
| uint8_t, m_pData.ReleaseAndClear().release(), h * m_nStride))); |
| } else { |
| uint8_t* pExternalBuffer = data(); |
| m_pData.Reset(std::unique_ptr<uint8_t, FxFreeDeleter>( |
| FX_Alloc(uint8_t, h * m_nStride))); |
| memcpy(data(), pExternalBuffer, m_nHeight * m_nStride); |
| } |
| memset(data() + m_nHeight * m_nStride, v ? 0xff : 0, |
| (h - m_nHeight) * m_nStride); |
| m_nHeight = h; |
| } |
| |
| bool CJBig2_Image::ComposeToInternal(CJBig2_Image* pDst, |
| int32_t x, |
| int32_t y, |
| JBig2ComposeOp op, |
| const FX_RECT& rtSrc) { |
| DCHECK(m_pData); |
| |
| // TODO(weili): Check whether the range check is correct. Should x>=1048576? |
| if (x < -1048576 || x > 1048576 || y < -1048576 || y > 1048576) |
| return false; |
| |
| int32_t sw = rtSrc.Width(); |
| int32_t sh = rtSrc.Height(); |
| |
| int32_t xs0 = x < 0 ? -x : 0; |
| int32_t xs1; |
| FX_SAFE_INT32 iChecked = pDst->m_nWidth; |
| iChecked -= x; |
| if (iChecked.IsValid() && sw > iChecked.ValueOrDie()) |
| xs1 = iChecked.ValueOrDie(); |
| else |
| xs1 = sw; |
| |
| int32_t ys0 = y < 0 ? -y : 0; |
| int32_t ys1; |
| iChecked = pDst->m_nHeight; |
| iChecked -= y; |
| if (iChecked.IsValid() && sh > iChecked.ValueOrDie()) |
| ys1 = iChecked.ValueOrDie(); |
| else |
| ys1 = sh; |
| |
| if (ys0 >= ys1 || xs0 >= xs1) |
| return false; |
| |
| int32_t xd0 = std::max(x, 0); |
| int32_t yd0 = std::max(y, 0); |
| int32_t w = xs1 - xs0; |
| int32_t h = ys1 - ys0; |
| int32_t xd1 = xd0 + w; |
| int32_t yd1 = yd0 + h; |
| uint32_t d1 = xd0 & 31; |
| uint32_t d2 = xd1 & 31; |
| uint32_t s1 = xs0 & 31; |
| uint32_t maskL = 0xffffffff >> d1; |
| uint32_t maskR = 0xffffffff << ((32 - (xd1 & 31)) % 32); |
| uint32_t maskM = maskL & maskR; |
| const uint8_t* lineSrc = |
| GetLineUnsafe(rtSrc.top + ys0) + BitIndexToAlignedByte(xs0 + rtSrc.left); |
| const uint8_t* lineSrcEnd = data() + m_nHeight * m_nStride; |
| int32_t lineLeft = m_nStride - BitIndexToAlignedByte(xs0); |
| uint8_t* lineDst = pDst->GetLineUnsafe(yd0) + BitIndexToAlignedByte(xd0); |
| if ((xd0 & ~31) == ((xd1 - 1) & ~31)) { |
| if ((xs0 & ~31) == ((xs1 - 1) & ~31)) { |
| if (s1 > d1) { |
| uint32_t shift = s1 - d1; |
| for (int32_t yy = yd0; yy < yd1; yy++) { |
| if (lineSrc >= lineSrcEnd) |
| return false; |
| uint32_t tmp1 = JBIG2_GETDWORD(lineSrc) << shift; |
| uint32_t tmp2 = JBIG2_GETDWORD(lineDst); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskM) | ((tmp1 | tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskM) | ((tmp1 & tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskM) | ((tmp1 ^ tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskM) | ((~(tmp1 ^ tmp2)) & maskM); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskM) | (tmp1 & maskM); |
| break; |
| } |
| JBIG2_PUTDWORD(lineDst, tmp); |
| lineSrc += m_nStride; |
| lineDst += pDst->m_nStride; |
| } |
| } else { |
| uint32_t shift = d1 - s1; |
| for (int32_t yy = yd0; yy < yd1; yy++) { |
| if (lineSrc >= lineSrcEnd) |
| return false; |
| uint32_t tmp1 = JBIG2_GETDWORD(lineSrc) >> shift; |
| uint32_t tmp2 = JBIG2_GETDWORD(lineDst); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskM) | ((tmp1 | tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskM) | ((tmp1 & tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskM) | ((tmp1 ^ tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskM) | ((~(tmp1 ^ tmp2)) & maskM); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskM) | (tmp1 & maskM); |
| break; |
| } |
| JBIG2_PUTDWORD(lineDst, tmp); |
| lineSrc += m_nStride; |
| lineDst += pDst->m_nStride; |
| } |
| } |
| } else { |
| uint32_t shift1 = s1 - d1; |
| uint32_t shift2 = 32 - shift1; |
| for (int32_t yy = yd0; yy < yd1; yy++) { |
| if (lineSrc >= lineSrcEnd) |
| return false; |
| uint32_t tmp1 = (JBIG2_GETDWORD(lineSrc) << shift1) | |
| (JBIG2_GETDWORD(lineSrc + 4) >> shift2); |
| uint32_t tmp2 = JBIG2_GETDWORD(lineDst); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskM) | ((tmp1 | tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskM) | ((tmp1 & tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskM) | ((tmp1 ^ tmp2) & maskM); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskM) | ((~(tmp1 ^ tmp2)) & maskM); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskM) | (tmp1 & maskM); |
| break; |
| } |
| JBIG2_PUTDWORD(lineDst, tmp); |
| lineSrc += m_nStride; |
| lineDst += pDst->m_nStride; |
| } |
| } |
| } else { |
| if (s1 > d1) { |
| uint32_t shift1 = s1 - d1; |
| uint32_t shift2 = 32 - shift1; |
| int32_t middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); |
| for (int32_t yy = yd0; yy < yd1; yy++) { |
| if (lineSrc >= lineSrcEnd) |
| return false; |
| const uint8_t* sp = lineSrc; |
| uint8_t* dp = lineDst; |
| if (d1 != 0) { |
| uint32_t tmp1 = (JBIG2_GETDWORD(sp) << shift1) | |
| (JBIG2_GETDWORD(sp + 4) >> shift2); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskL) | ((tmp1 | tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskL) | ((tmp1 & tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskL) | ((tmp1 ^ tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskL) | ((~(tmp1 ^ tmp2)) & maskL); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskL) | (tmp1 & maskL); |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| sp += 4; |
| dp += 4; |
| } |
| for (int32_t xx = 0; xx < middleDwords; xx++) { |
| uint32_t tmp1 = (JBIG2_GETDWORD(sp) << shift1) | |
| (JBIG2_GETDWORD(sp + 4) >> shift2); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = tmp1 | tmp2; |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = tmp1 & tmp2; |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = tmp1 ^ tmp2; |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = ~(tmp1 ^ tmp2); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = tmp1; |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| sp += 4; |
| dp += 4; |
| } |
| if (d2 != 0) { |
| uint32_t tmp1 = |
| (JBIG2_GETDWORD(sp) << shift1) | |
| (((sp + 4) < lineSrc + lineLeft ? JBIG2_GETDWORD(sp + 4) : 0) >> |
| shift2); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskR) | ((tmp1 | tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskR) | ((tmp1 & tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskR) | ((tmp1 ^ tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskR) | ((~(tmp1 ^ tmp2)) & maskR); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskR) | (tmp1 & maskR); |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| } |
| lineSrc += m_nStride; |
| lineDst += pDst->m_nStride; |
| } |
| } else if (s1 == d1) { |
| int32_t middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); |
| for (int32_t yy = yd0; yy < yd1; yy++) { |
| if (lineSrc >= lineSrcEnd) |
| return false; |
| const uint8_t* sp = lineSrc; |
| uint8_t* dp = lineDst; |
| if (d1 != 0) { |
| uint32_t tmp1 = JBIG2_GETDWORD(sp); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskL) | ((tmp1 | tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskL) | ((tmp1 & tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskL) | ((tmp1 ^ tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskL) | ((~(tmp1 ^ tmp2)) & maskL); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskL) | (tmp1 & maskL); |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| sp += 4; |
| dp += 4; |
| } |
| for (int32_t xx = 0; xx < middleDwords; xx++) { |
| uint32_t tmp1 = JBIG2_GETDWORD(sp); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = tmp1 | tmp2; |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = tmp1 & tmp2; |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = tmp1 ^ tmp2; |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = ~(tmp1 ^ tmp2); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = tmp1; |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| sp += 4; |
| dp += 4; |
| } |
| if (d2 != 0) { |
| uint32_t tmp1 = JBIG2_GETDWORD(sp); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskR) | ((tmp1 | tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskR) | ((tmp1 & tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskR) | ((tmp1 ^ tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskR) | ((~(tmp1 ^ tmp2)) & maskR); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskR) | (tmp1 & maskR); |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| } |
| lineSrc += m_nStride; |
| lineDst += pDst->m_nStride; |
| } |
| } else { |
| uint32_t shift1 = d1 - s1; |
| uint32_t shift2 = 32 - shift1; |
| int32_t middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); |
| for (int32_t yy = yd0; yy < yd1; yy++) { |
| if (lineSrc >= lineSrcEnd) |
| return false; |
| const uint8_t* sp = lineSrc; |
| uint8_t* dp = lineDst; |
| if (d1 != 0) { |
| uint32_t tmp1 = JBIG2_GETDWORD(sp) >> shift1; |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskL) | ((tmp1 | tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskL) | ((tmp1 & tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskL) | ((tmp1 ^ tmp2) & maskL); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskL) | ((~(tmp1 ^ tmp2)) & maskL); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskL) | (tmp1 & maskL); |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| dp += 4; |
| } |
| for (int32_t xx = 0; xx < middleDwords; xx++) { |
| uint32_t tmp1 = (JBIG2_GETDWORD(sp) << shift2) | |
| ((JBIG2_GETDWORD(sp + 4)) >> shift1); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = tmp1 | tmp2; |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = tmp1 & tmp2; |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = tmp1 ^ tmp2; |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = ~(tmp1 ^ tmp2); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = tmp1; |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| sp += 4; |
| dp += 4; |
| } |
| if (d2 != 0) { |
| uint32_t tmp1 = |
| (JBIG2_GETDWORD(sp) << shift2) | |
| (((sp + 4) < lineSrc + lineLeft ? JBIG2_GETDWORD(sp + 4) : 0) >> |
| shift1); |
| uint32_t tmp2 = JBIG2_GETDWORD(dp); |
| uint32_t tmp = 0; |
| switch (op) { |
| case JBIG2_COMPOSE_OR: |
| tmp = (tmp2 & ~maskR) | ((tmp1 | tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_AND: |
| tmp = (tmp2 & ~maskR) | ((tmp1 & tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_XOR: |
| tmp = (tmp2 & ~maskR) | ((tmp1 ^ tmp2) & maskR); |
| break; |
| case JBIG2_COMPOSE_XNOR: |
| tmp = (tmp2 & ~maskR) | ((~(tmp1 ^ tmp2)) & maskR); |
| break; |
| case JBIG2_COMPOSE_REPLACE: |
| tmp = (tmp2 & ~maskR) | (tmp1 & maskR); |
| break; |
| } |
| JBIG2_PUTDWORD(dp, tmp); |
| } |
| lineSrc += m_nStride; |
| lineDst += pDst->m_nStride; |
| } |
| } |
| } |
| return 1; |
| } |
