vendor: OpenCV 5.0.0 snapshot at 40738fb16ceddb5fb3fea747585f7ce6abb0605b

2026-08-22 00:10:33 +08:00
commit f7f077da11
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+/*
+ * Copyright (c) 1988-1997 Sam Leffler
+ * Copyright (c) 1991-1997 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the names of
+ * Sam Leffler and Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Sam Leffler and Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+/*
+ * TIFF Library.
+ *
+ * "Null" Compression Algorithm Support.
+ */
+#include "tiffiop.h"
+
+static int DumpFixupTags(TIFF *tif)
+{
+    (void)tif;
+    return (1);
+}
+
+/*
+ * Encode a hunk of pixels.
+ */
+static int DumpModeEncode(TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
+{
+    (void)s;
+    while (cc > 0)
+    {
+        tmsize_t n;
+
+        n = cc;
+        if (tif->tif_rawcc + n > tif->tif_rawdatasize)
+            n = tif->tif_rawdatasize - tif->tif_rawcc;
+
+        assert(n > 0);
+
+        /*
+         * Avoid copy if client has setup raw
+         * data buffer to avoid extra copy.
+         */
+        if (tif->tif_rawcp != pp)
+            _TIFFmemcpy(tif->tif_rawcp, pp, n);
+        tif->tif_rawcp += n;
+        tif->tif_rawcc += n;
+        pp += n;
+        cc -= n;
+        if (tif->tif_rawcc >= tif->tif_rawdatasize && !TIFFFlushData1(tif))
+            return (0);
+    }
+    return (1);
+}
+
+/*
+ * Decode a hunk of pixels.
+ */
+static int DumpModeDecode(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s)
+{
+    static const char module[] = "DumpModeDecode";
+    (void)s;
+    if (tif->tif_rawcc < cc)
+    {
+        TIFFErrorExtR(tif, module,
+                      "Not enough data for scanline %" PRIu32
+                      ", expected a request for at most %" TIFF_SSIZE_FORMAT
+                      " bytes, got a request for %" TIFF_SSIZE_FORMAT " bytes",
+                      tif->tif_row, tif->tif_rawcc, cc);
+        return (0);
+    }
+    /*
+     * Avoid copy if client has setup raw
+     * data buffer to avoid extra copy.
+     */
+    if (tif->tif_rawcp != buf)
+        _TIFFmemcpy(buf, tif->tif_rawcp, cc);
+    tif->tif_rawcp += cc;
+    tif->tif_rawcc -= cc;
+    return (1);
+}
+
+/*
+ * Seek forwards nrows in the current strip.
+ */
+static int DumpModeSeek(TIFF *tif, uint32_t nrows)
+{
+    tif->tif_rawcp += nrows * tif->tif_scanlinesize;
+    tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
+    return (1);
+}
+
+/*
+ * Initialize dump mode.
+ */
+int TIFFInitDumpMode(TIFF *tif, int scheme)
+{
+    (void)scheme;
+    tif->tif_fixuptags = DumpFixupTags;
+    tif->tif_decoderow = DumpModeDecode;
+    tif->tif_decodestrip = DumpModeDecode;
+    tif->tif_decodetile = DumpModeDecode;
+    tif->tif_encoderow = DumpModeEncode;
+    tif->tif_encodestrip = DumpModeEncode;
+    tif->tif_encodetile = DumpModeEncode;
+    tif->tif_seek = DumpModeSeek;
+    return (1);
+}