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87 lines
2.4 KiB
87 lines
2.4 KiB
# --- T2-COPYRIGHT-NOTE-BEGIN --- |
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# This copyright note is auto-generated by ./scripts/Create-CopyPatch. |
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# |
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# T2 SDE: package/.../libtiff/thumbnail-fixup.patch |
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# Copyright (C) 2004 - 2006 The T2 SDE Project |
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# |
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# More information can be found in the files COPYING and README. |
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# |
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# This patch file is dual-licensed. It is available under the license the |
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# patched project is licensed under, as long as it is an OpenSource license |
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# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms |
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# of the GNU General Public License as published by the Free Software |
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# Foundation; either version 2 of the License, or (at your option) any later |
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# version. |
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# --- T2-COPYRIGHT-NOTE-END --- |
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The box filter bit masking is broken in several ways - I wonder it ever worked |
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for anyone ... |
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Marked clamp inline, just in case. |
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- Rene Rebe <[email protected]> for Archivista GmbH Zürich |
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--- tiff-3.7.3/tools/thumbnail.c 2005-07-05 18:38:16.000000000 +0200 |
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+++ tiff-3.7.3-hackery/tools/thumbnail.c 2005-09-30 20:36:44.000000000 +0200 |
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@@ -369,7 +369,7 @@ |
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} |
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} |
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-static int clamp(float v, int low, int high) |
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+static int inline clamp(float v, int low, int high) |
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{ return (v < low ? low : v > high ? high : (int)v); } |
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#ifndef M_E |
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@@ -453,13 +453,15 @@ |
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} |
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rowoff[x] = sx0 >> 3; |
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fw = sx - sx0; /* width */ |
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+ if (fw == 0) fw = 1; |
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+ |
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+ src1[x] = fw; |
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b = (fw < 8) ? 0xff<<(8-fw) : 0xff; |
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src0[x] = b >> (sx0&7); |
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fw -= 8 - (sx0&7); |
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if (fw < 0) |
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fw = 0; |
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- src1[x] = fw >> 3; |
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- fw -= (fw>>3)<<3; |
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+ fw %= 8; |
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src2[x] = 0xff << (8-fw); |
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} |
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stepSrcWidth = sw; |
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@@ -471,20 +473,20 @@ |
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setrow(uint8* row, uint32 nrows, const uint8* rows[]) |
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{ |
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uint32 x; |
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- uint32 area = nrows * filterWidth; |
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for (x = 0; x < tnw; x++) { |
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uint32 mask0 = src0[x]; |
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uint32 fw = src1[x]; |
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- uint32 mask1 = src1[x]; |
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+ uint32 mask1 = src2[x]; |
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uint32 off = rowoff[x]; |
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uint32 acc = 0; |
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uint32 y, i; |
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for (y = 0; y < nrows; y++) { |
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const uint8* src = rows[y] + off; |
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+ uint32 _fw = fw - bits[mask0] - bits[mask1]; |
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acc += bits[*src++ & mask0]; |
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- switch (fw) { |
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+ switch (_fw) { |
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default: |
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- for (i = fw; i > 8; i--) |
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+ for (i = _fw; i > 8; i--) |
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acc += bits[*src++]; |
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/* fall thru... */ |
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case 8: acc += bits[*src++]; |
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@@ -499,8 +507,9 @@ |
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} |
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acc += bits[*src & mask1]; |
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} |
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+ uint32 area = nrows * fw; |
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*row++ = cmap[(255*acc)/area]; |
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} |
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} |
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/*
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