From 651605112d947e33bbbd46ea1276bf2ccb452005 Mon Sep 17 00:00:00 2001 From: Tom Sepez Date: Tue, 7 Aug 2018 17:13:07 +0000 Subject: Combine redundant CJBig2_Image code. Once upon a time, someone cut-n-pasted ~300 lines of code to avoid creating a default rectangle and to save a couple of additions. Then one path got one set of fixes (safe ints) and the other path got a second set of fixes (source bounds checks). Re-unify, picking up all the fixes, since they are identical otherwise. Change-Id: I099e854bc8ad027efabd5c2077c4319ee8221256 Reviewed-on: https://pdfium-review.googlesource.com/39550 Reviewed-by: Lei Zhang Commit-Queue: Tom Sepez --- core/fxcodec/jbig2/JBig2_Image.cpp | 425 ++----------------------------------- core/fxcodec/jbig2/JBig2_Image.h | 15 +- 2 files changed, 27 insertions(+), 413 deletions(-) (limited to 'core/fxcodec') diff --git a/core/fxcodec/jbig2/JBig2_Image.cpp b/core/fxcodec/jbig2/JBig2_Image.cpp index f37a368176..1194b1a402 100644 --- a/core/fxcodec/jbig2/JBig2_Image.cpp +++ b/core/fxcodec/jbig2/JBig2_Image.cpp @@ -152,37 +152,36 @@ void CJBig2_Image::Fill(bool v) { 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 ? ComposeToOpt2(pDst, x, y, op) : false; + 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) { - if (!m_pData) - return false; - - if (rtSrc == FX_RECT(0, 0, m_nWidth, m_nHeight)) - return ComposeToOpt2(pDst, x, y, op); - return ComposeToOpt2WithRect(pDst, x, y, op, rtSrc); + 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) : false; + 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) : false; + return m_pData && pSrc->ComposeToWithRect(this, x, y, rtSrc, op); } std::unique_ptr CJBig2_Image::SubImage(int32_t x, @@ -259,32 +258,37 @@ void CJBig2_Image::Expand(int32_t h, bool v) { m_nHeight = h; } -bool CJBig2_Image::ComposeToOpt2(CJBig2_Image* pDst, - int32_t x, - int32_t y, - JBig2ComposeOp op) { +bool CJBig2_Image::ComposeToInternal(CJBig2_Image* pDst, + int32_t x, + int32_t y, + JBig2ComposeOp op, + const FX_RECT& rtSrc) { ASSERT(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() && m_nWidth > iChecked.ValueOrDie()) + if (iChecked.IsValid() && sw > iChecked.ValueOrDie()) xs1 = iChecked.ValueOrDie(); else - xs1 = m_nWidth; + xs1 = sw; int32_t ys0 = y < 0 ? -y : 0; int32_t ys1; iChecked = pDst->m_nHeight; iChecked -= y; - if (iChecked.IsValid() && m_nHeight > iChecked.ValueOrDie()) - ys1 = pDst->m_nHeight - y; + if (iChecked.IsValid() && sh > iChecked.ValueOrDie()) + ys1 = iChecked.ValueOrDie(); else - ys1 = m_nHeight; + ys1 = sh; if (ys0 >= ys1 || xs0 >= xs1) return false; @@ -301,391 +305,6 @@ bool CJBig2_Image::ComposeToOpt2(CJBig2_Image* pDst, uint32_t maskL = 0xffffffff >> d1; uint32_t maskR = 0xffffffff << ((32 - (xd1 & 31)) % 32); uint32_t maskM = maskL & maskR; - uint8_t* lineSrc = GetLineUnsafe(ys0) + BIT_INDEX_TO_ALIGNED_BYTE(xs0); - int32_t lineLeft = m_nStride - BIT_INDEX_TO_ALIGNED_BYTE(xs0); - uint8_t* lineDst = pDst->GetLineUnsafe(yd0) + BIT_INDEX_TO_ALIGNED_BYTE(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++) { - 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++) { - 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++) { - 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 { - uint8_t* sp = nullptr; - uint8_t* dp = nullptr; - 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++) { - sp = lineSrc; - 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++) { - sp = lineSrc; - 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++) { - sp = lineSrc; - 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 true; -} - -bool CJBig2_Image::ComposeToOpt2WithRect(CJBig2_Image* pDst, - int32_t x, - int32_t y, - JBig2ComposeOp op, - const FX_RECT& rtSrc) { - ASSERT(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 ys0 = y < 0 ? -y : 0; - int32_t ys1 = y + sh > pDst->m_nHeight ? pDst->m_nHeight - y : sh; - int32_t xs0 = x < 0 ? -x : 0; - int32_t xs1 = x + sw > pDst->m_nWidth ? pDst->m_nWidth - x : sw; - if ((ys0 >= ys1) || (xs0 >= xs1)) { - return 0; - } - int32_t w = xs1 - xs0; - int32_t h = ys1 - ys0; - int32_t yd0 = y < 0 ? 0 : y; - int32_t xd0 = x < 0 ? 0 : x; - int32_t xd1 = xd0 + w; - int32_t yd1 = yd0 + h; - int32_t d1 = xd0 & 31; - int32_t d2 = xd1 & 31; - int32_t s1 = xs0 & 31; - int32_t maskL = 0xffffffff >> d1; - int32_t maskR = 0xffffffff << ((32 - (xd1 & 31)) % 32); - int32_t maskM = maskL & maskR; const uint8_t* lineSrc = GetLineUnsafe(rtSrc.top + ys0) + BIT_INDEX_TO_ALIGNED_BYTE(xs0 + rtSrc.left); const uint8_t* lineSrcEnd = data() + m_nHeight * m_nStride; diff --git a/core/fxcodec/jbig2/JBig2_Image.h b/core/fxcodec/jbig2/JBig2_Image.h index d593054e4d..a431510a7b 100644 --- a/core/fxcodec/jbig2/JBig2_Image.h +++ b/core/fxcodec/jbig2/JBig2_Image.h @@ -79,16 +79,11 @@ class CJBig2_Image { int32_t w, int32_t h, CJBig2_Image* pImage); - - bool ComposeToOpt2(CJBig2_Image* pDst, - int32_t x, - int32_t y, - JBig2ComposeOp op); - bool ComposeToOpt2WithRect(CJBig2_Image* pDst, - int32_t x, - int32_t y, - JBig2ComposeOp op, - const FX_RECT& rtSrc); + bool ComposeToInternal(CJBig2_Image* pDst, + int32_t x, + int32_t y, + JBig2ComposeOp op, + const FX_RECT& rtSrc); MaybeOwned m_pData; int32_t m_nWidth = 0; // 1-bit pixels -- cgit v1.2.3