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-rw-r--r--nxcompext/Clean.c341
1 files changed, 341 insertions, 0 deletions
diff --git a/nxcompext/Clean.c b/nxcompext/Clean.c
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+++ b/nxcompext/Clean.c
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+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/. */
+/* */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software */
+/* are copyright of NoMachine. Redistribution and use of the present */
+/* software is allowed according to terms specified in the file LICENSE */
+/* which comes in the source distribution. */
+/* */
+/* Check http://www.nomachine.com/licensing.html for applicability. */
+/* */
+/* NX and NoMachine are trademarks of NoMachine S.r.l. */
+/* */
+/* All rigths reserved. */
+/* */
+/**************************************************************************/
+
+#include <stdio.h>
+#include <signal.h>
+
+#include "os.h"
+
+#include "NXlib.h"
+
+#include "Clean.h"
+
+#define PANIC
+#define WARNING
+#undef TEST
+#undef DEBUG
+
+int CleanXYImage(XImage *image)
+{
+ int i, j, k, plane;
+
+ int bitsToClean = (image -> bytes_per_line << 3) - image -> width - image -> xoffset;
+
+ unsigned int bytesToClean = bitsToClean >> 3;
+
+ bitsToClean &= 7;
+
+ for (k = 0; k < image -> depth; k++)
+ {
+ plane = k * (image -> bytes_per_line * image -> height);
+
+ for (i = 1; i <= image -> height; i++)
+ {
+ if (image -> byte_order == image -> bitmap_bit_order)
+ {
+ for (j = 1; j <= bytesToClean; j++)
+ {
+ image -> data[plane + i * (image -> bytes_per_line) - j] = 0x00;
+ }
+ }
+ else
+ {
+ for (j = bytesToClean; j >= 1; j--)
+ {
+ image -> data[plane + i * (image -> bytes_per_line) - j] = 0x00;
+ }
+ }
+
+ if (image -> bitmap_bit_order == MSBFirst)
+ {
+ image -> data[plane + i * (image -> bytes_per_line) - j] &= 0xff << bitsToClean;
+ }
+ else
+ {
+ image -> data[plane + i * (image -> bytes_per_line) - j] &= 0xff >> bitsToClean;
+ }
+ }
+ }
+
+ return 1;
+}
+
+int CleanZImage(XImage *image)
+{
+ unsigned int bytesToClean;
+ unsigned int j;
+ unsigned int imageLength;
+
+ #ifdef TEST
+ fprintf(stderr, "*****CleanZImage: Going to clean image of [%d] bits per pixel.\n",
+ image -> bits_per_pixel);
+ #endif
+
+ switch (image -> bits_per_pixel)
+ {
+ case 32:
+ {
+ /*
+ * The caller should pay attention at extracting
+ * the alpha channel prior to cleaning the image.
+ * Cleaning an image which is carrying the alpha
+ * channel will result in the image being treated
+ * as fully transparent.
+ */
+
+ register int i;
+
+ bytesToClean = image -> bytes_per_line * image -> height;
+
+ #ifdef DEBUG
+ fprintf(stderr, "*****CleanZImage: Cleaning [%d] bytes with bits per pixel [%d] "
+ "width [%d] bytes per line [%d] height [%d].\n", bytesToClean,
+ image -> bits_per_pixel, image -> width, image ->
+ bytes_per_line, image -> height);
+ #endif
+
+ if (image -> byte_order == LSBFirst)
+ {
+ for (i = 3; i < bytesToClean; i += 4)
+ {
+ ((unsigned char *) image -> data)[i] = 0x00;
+ }
+ }
+ else
+ {
+ for (i = 0; i < bytesToClean; i += 4)
+ {
+ ((unsigned char *) image -> data)[i] = 0x00;
+ }
+ }
+
+ break;
+ }
+ case 24:
+ case 15:
+ case 16:
+ case 8:
+ {
+ register int i, j;
+
+ bytesToClean = image -> bytes_per_line -
+ ((image -> width * image -> bits_per_pixel) >> 3);
+
+ for (i = 1; i <= image -> height; i++)
+ {
+ for (j = bytesToClean; j > 0; j--)
+ {
+ ((unsigned char *) image -> data)[(i * image -> bytes_per_line) - j] = 0x00;
+ }
+ }
+
+ break;
+ }
+ default:
+ {
+ #ifdef PANIC
+ fprintf(stderr, "*****CleanZImage: PANIC! Cannot clean image with [%d] bits per pixel.\n",
+ image -> bits_per_pixel);
+ #endif
+ }
+ }
+
+ /*
+ * Clean the padding bytes at the real
+ * end of the buffer.
+ */
+
+ imageLength = image -> bytes_per_line * image -> height;
+
+ bytesToClean = imageLength % 4;
+
+ for (j = 0; j < bytesToClean; j++)
+ {
+ ((unsigned char *)image -> data)[(imageLength + j)] = 0x00;
+ }
+
+ return 1;
+}
+
+/*
+ * Copy a clean version of src_image into dst_image.
+ * This code is not taking care of the image format.
+ * The agent doesn't use it and you have to consider
+ * it unsupported.
+ */
+
+int CopyAndCleanImage(XImage *src_image, XImage *dst_image)
+{
+ register long data_size;
+ register int i;
+
+ data_size = (src_image -> bytes_per_line * src_image -> height) >> 2;
+
+ #ifdef WARNING
+ fprintf(stderr, "******CleanImage: WARNING! Function called with image of [%d] bits per pixel.\n",
+ src_image -> bits_per_pixel);
+ #endif
+
+ switch (src_image -> bits_per_pixel)
+ {
+ case 32:
+ {
+ unsigned int mask;
+
+ if (src_image -> byte_order == MSBFirst)
+ {
+ mask = 0xffffff00;
+ }
+ else
+ {
+ mask = 0x00ffffff;
+ }
+ for (i = 0; i < data_size; i++)
+ {
+ ((unsigned int *)dst_image -> data)[i] = ((unsigned int *)src_image -> data)[i] & mask;
+ }
+
+ break;
+ }
+
+ case 24:
+ {
+ unsigned int bytes_to_clean;
+
+ for (i = 0; i < data_size; i++)
+ {
+ ((unsigned int *)dst_image -> data)[i] = ((unsigned int *)src_image -> data)[i];
+ }
+
+ bytes_to_clean = dst_image -> bytes_per_line - ((dst_image -> width *
+ dst_image -> bits_per_pixel) >> 3);
+
+ if (bytes_to_clean)
+ {
+ register unsigned int mask = 0xffffffff;
+ register int line_size;
+ register int i;
+
+ line_size = dst_image -> bytes_per_line >> 2;
+
+ if (dst_image -> byte_order == MSBFirst)
+ {
+ mask = mask << (bytes_to_clean << 3);
+ }
+ else
+ {
+ mask = mask >> (bytes_to_clean << 3);
+ }
+
+ for (i = 0; i < dst_image -> height;)
+ {
+ ((unsigned char *)dst_image -> data)[(++i * line_size) -1] &= mask;
+ }
+ }
+
+ break;
+ }
+
+ case 15:
+ case 16:
+ {
+ for (i = 0; i < data_size; i++)
+ {
+ ((unsigned int *) dst_image -> data)[i] = ((unsigned int *) src_image -> data)[i];
+ }
+
+ if (src_image -> width & 0x00000001)
+ {
+ int card32_per_line = dst_image -> bytes_per_line >> 2;
+
+ for (i = 0; i < dst_image -> height;)
+ {
+ ((unsigned int *) dst_image -> data)[(++i * card32_per_line) -1] &= 0x0000ffff;
+ }
+ }
+
+ break;
+ }
+
+ case 8:
+ {
+ unsigned int mask = 0x00000000;
+
+ switch (dst_image -> width % 4)
+ {
+ case 3:
+ {
+ mask = 0x00ffffff;
+
+ break;
+ }
+ case 2:
+ {
+ mask = 0x0000ffff;
+
+ break;
+ }
+ case 1:
+ {
+ mask = 0x000000ff;
+
+ break;
+ }
+ default:
+ {
+ /*
+ * Nothing to clean.
+ */
+
+ break;
+ }
+ }
+
+ for (i = 0; i < data_size; i++)
+ {
+ ((unsigned int *) dst_image -> data)[i] = ((unsigned int *) src_image -> data)[i];
+ }
+
+ if (mask)
+ {
+ int card32_per_line;
+ int i;
+
+ card32_per_line = dst_image -> bytes_per_line >> 2;
+
+ for (i = 0; i < dst_image -> height; i++)
+ {
+ ((unsigned int *) dst_image -> data)[(++i * card32_per_line) -1] &= mask;
+ }
+ }
+
+ break;
+ }
+
+ default:
+ {
+ #ifdef PANIC
+ fprintf(stderr, "******CleanImage: PANIC! Cannot clean image of [%d] bits per pixel.\n",
+ src_image -> bits_per_pixel);
+ #endif
+
+ return 0;
+ }
+ }
+
+ return 1;
+}
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