New upstream version 1.0.28upstream/1.0.28

1 files changed, 345 insertions, 0 deletions

diff --git a/backend/genesys_conv_hlp.cc b/backend/genesys_conv_hlp.cc
new file mode 100644
index 0000000..7663a87
--- /dev/null
+++ b/backend/genesys_conv_hlp.cc
@@ -0,0 +1,345 @@
+/* sane - Scanner Access Now Easy.
+
+   Copyright (C) 2005 Pierre Willenbrock <pierre@pirsoft.dnsalias.org>
+
+   This file is part of the SANE package.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
+
+   As a special exception, the authors of SANE give permission for
+   additional uses of the libraries contained in this release of SANE.
+
+   The exception is that, if you link a SANE library with other files
+   to produce an executable, this does not by itself cause the
+   resulting executable to be covered by the GNU General Public
+   License.  Your use of that executable is in no way restricted on
+   account of linking the SANE library code into it.
+
+   This exception does not, however, invalidate any other reasons why
+   the executable file might be covered by the GNU General Public
+   License.
+
+   If you submit changes to SANE to the maintainers to be included in
+   a subsequent release, you agree by submitting the changes that
+   those changes may be distributed with this exception intact.
+
+   If you write modifications of your own for SANE, it is your choice
+   whether to permit this exception to apply to your modifications.
+   If you do not wish that, delete this exception notice.
+*/
+
+/*
+ * Conversion filters for genesys backend
+ */
+
+static SANE_Status
+FUNC_NAME(genesys_reorder_components_cis) (
+    uint8_t *src_data,
+    uint8_t *dst_data,
+    unsigned int lines,
+    unsigned int pixels)
+{
+    unsigned int x, y;
+    uint8_t *src[3];
+    uint8_t *dst = dst_data;
+    unsigned int rest = pixels * 2 * BYTES_PER_COMPONENT;
+
+    src[0] = src_data + pixels * BYTES_PER_COMPONENT * 0;
+    src[1] = src_data + pixels * BYTES_PER_COMPONENT * 1;
+    src[2] = src_data + pixels * BYTES_PER_COMPONENT * 2;
+
+    for(y = 0; y < lines; y++) {
+	for(x = 0; x < pixels; x++) {
+
+#ifndef DOUBLE_BYTE
+	    *dst++ = *src[0]++;
+	    *dst++ = *src[1]++;
+	    *dst++ = *src[2]++;
+#else
+#  ifndef WORDS_BIGENDIAN
+	    *dst++ = *src[0]++;
+	    *dst++ = *src[0]++;
+	    *dst++ = *src[1]++;
+	    *dst++ = *src[1]++;
+	    *dst++ = *src[2]++;
+	    *dst++ = *src[2]++;
+#  else
+	    *dst++ = src[0][1];
+	    *dst++ = src[0][0];
+	    *dst++ = src[1][1];
+	    *dst++ = src[1][0];
+	    *dst++ = src[2][1];
+	    *dst++ = src[2][0];
+	    src[0] += 2;
+	    src[1] += 2;
+	    src[2] += 2;
+#  endif
+#endif
+	}
+
+	src[0] += rest;
+	src[1] += rest;
+	src[2] += rest;
+    }
+    return SANE_STATUS_GOOD;
+}
+
+static SANE_Status
+FUNC_NAME(genesys_reorder_components_cis_bgr) (
+    uint8_t *src_data,
+    uint8_t *dst_data,
+    unsigned int lines,
+    unsigned int pixels)
+{
+    unsigned int x, y;
+    uint8_t *src[3];
+    uint8_t *dst = dst_data;
+    unsigned int rest = pixels * 2 * BYTES_PER_COMPONENT;
+
+    src[0] = src_data + pixels * BYTES_PER_COMPONENT * 0;
+    src[1] = src_data + pixels * BYTES_PER_COMPONENT * 1;
+    src[2] = src_data + pixels * BYTES_PER_COMPONENT * 2;
+
+    for(y = 0; y < lines; y++) {
+	for(x = 0; x < pixels; x++) {
+#ifndef DOUBLE_BYTE
+	    *dst++ = *src[2]++;
+	    *dst++ = *src[1]++;
+	    *dst++ = *src[0]++;
+#else
+#  ifndef WORDS_BIGENDIAN
+	    *dst++ = *src[2]++;
+	    *dst++ = *src[2]++;
+	    *dst++ = *src[1]++;
+	    *dst++ = *src[1]++;
+	    *dst++ = *src[0]++;
+	    *dst++ = *src[0]++;
+#  else
+	    *dst++ = src[2][1];
+	    *dst++ = src[2][0];
+	    *dst++ = src[1][1];
+	    *dst++ = src[1][0];
+	    *dst++ = src[0][1];
+	    *dst++ = src[0][0];
+	    src[0] += 2;
+	    src[1] += 2;
+	    src[2] += 2;
+#  endif
+#endif
+	}
+
+	src[0] += rest;
+	src[1] += rest;
+	src[2] += rest;
+    }
+    return SANE_STATUS_GOOD;
+}
+
+static SANE_Status
+FUNC_NAME(genesys_reorder_components_bgr) (
+    uint8_t *src_data,
+    uint8_t *dst_data,
+    unsigned int lines,
+    unsigned int pixels)
+{
+    unsigned int c;
+    uint8_t *src = src_data;
+    uint8_t *dst = dst_data;
+
+    for(c = 0; c < lines * pixels; c++) {
+
+#ifndef DOUBLE_BYTE
+	*dst++ = src[2];
+	*dst++ = src[1];
+	*dst++ = src[0];
+	src += 3;
+#else
+#  ifndef WORDS_BIGENDIAN
+	*dst++ = src[2 * 2 + 0];
+	*dst++ = src[2 * 2 + 1];
+	*dst++ = src[1 * 2 + 0];
+	*dst++ = src[1 * 2 + 1];
+	*dst++ = src[0 * 2 + 0];
+	*dst++ = src[0 * 2 + 1];
+#  else
+	*dst++ = src[2 * 2 + 1];
+	*dst++ = src[2 * 2 + 0];
+	*dst++ = src[1 * 2 + 1];
+	*dst++ = src[1 * 2 + 0];
+	*dst++ = src[0 * 2 + 1];
+	*dst++ = src[0 * 2 + 0];
+#  endif
+	src += 3 * 2;
+#endif
+
+    }
+    return SANE_STATUS_GOOD;
+}
+
+#if defined(DOUBLE_BYTE) && defined(WORDS_BIGENDIAN)
+static SANE_Status
+FUNC_NAME(genesys_reorder_components_endian) (
+    uint8_t *src_data,
+    uint8_t *dst_data,
+    unsigned int lines,
+    unsigned int pixels,
+    unsigned int channels)
+{
+    unsigned int c;
+    uint8_t *src = src_data;
+    uint8_t *dst = dst_data;
+
+    for(c = 0; c < lines * pixels * channels; c++) {
+	*dst++ = src[1];
+	*dst++ = src[0];
+	src += 2;
+    }
+return SANE_STATUS_GOOD;
+}
+#endif /*defined(DOUBLE_BYTE) && defined(WORDS_BIGENDIAN)*/
+
+
+static SANE_Status
+FUNC_NAME(genesys_reverse_ccd) (
+    uint8_t *src_data,
+    uint8_t *dst_data,
+    unsigned int lines,
+    unsigned int components_per_line,
+    unsigned int *ccd_shift,
+    unsigned int component_count)
+{
+    unsigned int x, y, c;
+    COMPONENT_TYPE *src = (COMPONENT_TYPE *)src_data;
+    COMPONENT_TYPE *dst = (COMPONENT_TYPE *)dst_data;
+    COMPONENT_TYPE *srcp;
+    COMPONENT_TYPE *dstp;
+    unsigned int pitch = components_per_line;
+    unsigned int ccd_shift_pitch[12];
+    unsigned int *csp;
+
+    for (c = 0; c < component_count; c++)
+	ccd_shift_pitch[c] = ccd_shift[c] * pitch;
+
+/*
+ * cache efficiency:
+   we are processing a single line component_count times, so it should fit
+   into the cpu cache for maximum efficiency. our lines take
+   maximum 252kb(3 channels, 16bit, 2400dpi, full gl841 shading range)
+ * instruction efficiency:
+   the innermost loop runs long and consists of 3 adds, one compare,
+   2 derefences.
+ */
+/*
+    for (y = 0; y < lines; y++) {
+	csp = ccd_shift_pitch;
+	for (c = 0; c < component_count; c++) {
+	    srcp = src + c + *csp++;
+	    dstp = dst + c;
+	    for (x = 0; x < pitch; x += component_count) {
+		*dstp = *srcp;
+		srcp += component_count;
+		dstp += component_count;
+	    }
+	}
+	dst += pitch;
+	src += pitch;
+    }
+ */
+/*
+ * cache efficency:
+   here only line_dist_pitch needs to stay in cache. 12*4 = 48 bytes
+ * instruction efficiency:
+   we have a short running inner loop, consisting of 4 incs, 2 compare, 1 add,
+   2 dereference and 1 indexed dereference.
+   the enclosing loop is long running, consisting of 1 add, 1 compare.
+ */
+    srcp = src;
+    dstp = dst;
+    for (y = 0; y < lines; y++) {
+	for (x = 0; x < pitch; x += component_count) {
+	    csp = ccd_shift_pitch;
+	    for (c = 0; c < component_count && c + x < pitch; c++) {
+		*dstp = srcp[*csp++];
+		dstp++;
+		srcp++;
+	    }
+	}
+    }
+    return SANE_STATUS_GOOD;
+}
+
+static SANE_Status
+FUNC_NAME(genesys_shrink_lines) (
+    uint8_t *src_data,
+    uint8_t *dst_data,
+    unsigned int lines,
+    unsigned int src_pixels,
+    unsigned int dst_pixels,
+    unsigned int channels)
+{
+    unsigned int dst_x, src_x, y, c, cnt;
+    unsigned int avg[3];
+    unsigned int count;
+    COMPONENT_TYPE *src = (COMPONENT_TYPE *)src_data;
+    COMPONENT_TYPE *dst = (COMPONENT_TYPE *)dst_data;
+
+    if (src_pixels > dst_pixels) {
+/*average*/
+	for (c = 0; c < channels; c++)
+	    avg[c] = 0;
+	for(y = 0; y < lines; y++) {
+	    cnt = src_pixels / 2;
+	    src_x = 0;
+	    for (dst_x = 0; dst_x < dst_pixels; dst_x++) {
+		count = 0;
+		while (cnt < src_pixels && src_x < src_pixels) {
+		    cnt += dst_pixels;
+
+		    for (c = 0; c < channels; c++)
+			avg[c] += *src++;
+		    src_x++;
+		    count++;
+		}
+		cnt -= src_pixels;
+
+		for (c = 0; c < channels; c++) {
+		    *dst++ = avg[c] / count;
+		    avg[c] = 0;
+		}
+	    }
+	}
+    } else {
+/*interpolate. copy pixels*/
+	for(y = 0; y < lines; y++) {
+	    cnt = dst_pixels / 2;
+	    dst_x = 0;
+	    for (src_x = 0; src_x < src_pixels; src_x++) {
+		for (c = 0; c < channels; c++)
+		    avg[c] = *src++;
+		while ((cnt < dst_pixels || src_x + 1 == src_pixels) &&
+		       dst_x < dst_pixels) {
+		    cnt += src_pixels;
+
+		    for (c = 0; c < channels; c++)
+			*dst++ = avg[c];
+		    dst_x++;
+		}
+		cnt -= dst_pixels;
+	    }
+	}
+    }
+    return SANE_STATUS_GOOD;
+}