From 28cb9a764765ed3e3fc981ff6f4e9e0519033954 Mon Sep 17 00:00:00 2001 From: Lei Zhang Date: Thu, 18 Jan 2018 19:04:18 +0000 Subject: Declare variables closer to use in CJBig2_Image::composeTo_opt2(). Change-Id: Ifabaf71bb45ffa7e9af7da4acb21d8757e9596ce Reviewed-on: https://pdfium-review.googlesource.com/23150 Reviewed-by: Ryan Harrison Commit-Queue: Lei Zhang --- core/fxcodec/jbig2/JBig2_Image.cpp | 184 +++++++++++++++++++------------------ 1 file changed, 94 insertions(+), 90 deletions(-) (limited to 'core/fxcodec') diff --git a/core/fxcodec/jbig2/JBig2_Image.cpp b/core/fxcodec/jbig2/JBig2_Image.cpp index a8d28ace77..13323bac30 100644 --- a/core/fxcodec/jbig2/JBig2_Image.cpp +++ b/core/fxcodec/jbig2/JBig2_Image.cpp @@ -4,10 +4,13 @@ // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com +#include "core/fxcodec/jbig2/JBig2_Image.h" + #include + +#include #include -#include "core/fxcodec/jbig2/JBig2_Image.h" #include "core/fxcrt/fx_coordinates.h" #include "core/fxcrt/fx_memory.h" #include "core/fxcrt/fx_safe_types.h" @@ -248,63 +251,52 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, int32_t x, int32_t y, JBig2ComposeOp op) { - int32_t xs0 = 0, ys0 = 0, xs1 = 0, ys1 = 0, xd0 = 0, yd0 = 0, xd1 = 0, - yd1 = 0, xx = 0, yy = 0, w = 0, h = 0, middleDwords = 0, lineLeft = 0; - - uint32_t s1 = 0, d1 = 0, d2 = 0, shift = 0, shift1 = 0, shift2 = 0, tmp = 0, - tmp1 = 0, tmp2 = 0, maskL = 0, maskR = 0, maskM = 0; - if (!m_pData) return false; if (x < -1048576 || x > 1048576 || y < -1048576 || y > 1048576) return false; - if (y < 0) { - ys0 = -y; - } - if (y + m_nHeight > pDst->m_nHeight) { - ys1 = pDst->m_nHeight - y; - } else { - ys1 = m_nHeight; - } - if (x < 0) { - xs0 = -x; - } - if (x + m_nWidth > pDst->m_nWidth) { + int32_t xs0 = x < 0 ? -x : 0; + int32_t xs1; + if (x + m_nWidth > pDst->m_nWidth) xs1 = pDst->m_nWidth - x; - } else { + else xs1 = m_nWidth; - } - if ((ys0 >= ys1) || (xs0 >= xs1)) { - return 0; - } - w = xs1 - xs0; - h = ys1 - ys0; - if (y >= 0) { - yd0 = y; - } - if (x >= 0) { - xd0 = x; - } - xd1 = xd0 + w; - yd1 = yd0 + h; - d1 = xd0 & 31; - d2 = xd1 & 31; - s1 = xs0 & 31; - maskL = 0xffffffff >> d1; - maskR = 0xffffffff << ((32 - (xd1 & 31)) % 32); - maskM = maskL & maskR; + + int32_t ys0 = y < 0 ? -y : 0; + int32_t ys1; + if (y + m_nHeight > pDst->m_nHeight) + ys1 = pDst->m_nHeight - y; + else + ys1 = m_nHeight; + + 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; uint8_t* lineSrc = data() + ys0 * m_nStride + ((xs0 >> 5) << 2); - lineLeft = m_nStride - ((xs0 >> 5) << 2); + int32_t lineLeft = m_nStride - ((xs0 >> 5) << 2); uint8_t* lineDst = pDst->data() + yd0 * pDst->m_nStride + ((xd0 >> 5) << 2); if ((xd0 & ~31) == ((xd1 - 1) & ~31)) { if ((xs0 & ~31) == ((xs1 - 1) & ~31)) { if (s1 > d1) { - shift = s1 - d1; - for (yy = yd0; yy < yd1; yy++) { - tmp1 = JBIG2_GETDWORD(lineSrc) << shift; - tmp2 = JBIG2_GETDWORD(lineDst); + 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); @@ -330,10 +322,11 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, lineDst += pDst->m_nStride; } } else { - shift = d1 - s1; - for (yy = yd0; yy < yd1; yy++) { - tmp1 = JBIG2_GETDWORD(lineSrc) >> shift; - tmp2 = JBIG2_GETDWORD(lineDst); + 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); @@ -360,12 +353,13 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, } } } else { - shift1 = s1 - d1; - shift2 = 32 - shift1; - for (yy = yd0; yy < yd1; yy++) { - tmp1 = (JBIG2_GETDWORD(lineSrc) << shift1) | - (JBIG2_GETDWORD(lineSrc + 4) >> shift2); - tmp2 = JBIG2_GETDWORD(lineDst); + 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); @@ -396,16 +390,17 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, uint8_t* dp = nullptr; if (s1 > d1) { - shift1 = s1 - d1; - shift2 = 32 - shift1; - middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); - for (yy = yd0; yy < yd1; yy++) { + 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) { - tmp1 = (JBIG2_GETDWORD(sp) << shift1) | - (JBIG2_GETDWORD(sp + 4) >> shift2); - tmp2 = JBIG2_GETDWORD(dp); + 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); @@ -430,10 +425,11 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, sp += 4; dp += 4; } - for (xx = 0; xx < middleDwords; xx++) { - tmp1 = (JBIG2_GETDWORD(sp) << shift1) | - (JBIG2_GETDWORD(sp + 4) >> shift2); - tmp2 = JBIG2_GETDWORD(dp); + 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; @@ -459,11 +455,12 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, dp += 4; } if (d2 != 0) { - tmp1 = + uint32_t tmp1 = (JBIG2_GETDWORD(sp) << shift1) | (((sp + 4) < lineSrc + lineLeft ? JBIG2_GETDWORD(sp + 4) : 0) >> shift2); - tmp2 = JBIG2_GETDWORD(dp); + uint32_t tmp2 = JBIG2_GETDWORD(dp); + uint32_t tmp = 0; switch (op) { case JBIG2_COMPOSE_OR: tmp = (tmp2 & ~maskR) | ((tmp1 | tmp2) & maskR); @@ -490,13 +487,14 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, lineDst += pDst->m_nStride; } } else if (s1 == d1) { - middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); - for (yy = yd0; yy < yd1; yy++) { + int32_t middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); + for (int32_t yy = yd0; yy < yd1; yy++) { sp = lineSrc; dp = lineDst; if (d1 != 0) { - tmp1 = JBIG2_GETDWORD(sp); - tmp2 = JBIG2_GETDWORD(dp); + 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); @@ -521,9 +519,10 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, sp += 4; dp += 4; } - for (xx = 0; xx < middleDwords; xx++) { - tmp1 = JBIG2_GETDWORD(sp); - tmp2 = JBIG2_GETDWORD(dp); + 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; @@ -549,8 +548,9 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, dp += 4; } if (d2 != 0) { - tmp1 = JBIG2_GETDWORD(sp); - tmp2 = JBIG2_GETDWORD(dp); + 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); @@ -577,15 +577,16 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, lineDst += pDst->m_nStride; } } else { - shift1 = d1 - s1; - shift2 = 32 - shift1; - middleDwords = (xd1 >> 5) - ((xd0 + 31) >> 5); - for (yy = yd0; yy < yd1; yy++) { + 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) { - tmp1 = JBIG2_GETDWORD(sp) >> shift1; - tmp2 = JBIG2_GETDWORD(dp); + 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); @@ -609,10 +610,11 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, dp[3] = (uint8_t)tmp; dp += 4; } - for (xx = 0; xx < middleDwords; xx++) { - tmp1 = (JBIG2_GETDWORD(sp) << shift2) | - ((JBIG2_GETDWORD(sp + 4)) >> shift1); - tmp2 = JBIG2_GETDWORD(dp); + 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; @@ -638,11 +640,12 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, dp += 4; } if (d2 != 0) { - tmp1 = + uint32_t tmp1 = (JBIG2_GETDWORD(sp) << shift2) | (((sp + 4) < lineSrc + lineLeft ? JBIG2_GETDWORD(sp + 4) : 0) >> shift1); - tmp2 = JBIG2_GETDWORD(dp); + uint32_t tmp2 = JBIG2_GETDWORD(dp); + uint32_t tmp = 0; switch (op) { case JBIG2_COMPOSE_OR: tmp = (tmp2 & ~maskR) | ((tmp1 | tmp2) & maskR); @@ -670,8 +673,9 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, } } } - return 1; + return true; } + bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, int32_t x, int32_t y, -- cgit v1.2.3