1 files changed, 89 insertions, 0 deletions
diff --git a/Imaging/libImaging/RawEncode.c b/Imaging/libImaging/RawEncode.c
new file mode 100644
index 0000000..945c666
--- /dev/null
+++ b/Imaging/libImaging/RawEncode.c
@@ -0,0 +1,89 @@
+/*
+ * The Python Imaging Library.
+ * $Id: RawEncode.c 2134 2004-10-06 08:55:20Z fredrik $
+ *
+ * coder for raw data
+ *
+ * FIXME: This encoder will fail if the buffer is not large enough to
+ * hold one full line of data.  There's a workaround for this problem
+ * in ImageFile.py, but it should be solved here instead.
+ *
+ * history:
+ * 96-04-30 fl	created
+ * 97-01-03 fl	fixed padding
+ *
+ * Copyright (c) Fredrik Lundh 1996-97.
+ * Copyright (c) Secret Labs AB 1997.
+ *
+ * See the README file for information on usage and redistribution.  */
+
+
+#include "Imaging.h"
+
+int
+ImagingRawEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
+{
+    UINT8* ptr;
+
+    if (!state->state) {
+
+	/* The "count" field holds the stride, if specified.  Fix
+	   things up so "bytes" is the full size, and "count" the
+	   packed size */
+
+	if (state->count > 0) {
+	    int bytes = state->count;
+
+	    /* stride must not be less than real size */
+	    if (state->count < state->bytes) {
+		state->errcode = IMAGING_CODEC_CONFIG;
+		return -1;
+	    }
+	    state->count = state->bytes;
+	    state->bytes = bytes;
+	} else
+	    state->count = state->bytes;
+
+	/* The "ystep" field specifies the orientation */
+
+	if (state->ystep < 0) {
+	    state->y = state->ysize-1;
+	    state->ystep = -1;
+	} else
+	    state->ystep = 1;
+
+	state->state = 1;
+
+    }
+
+    if (bytes < state->bytes) {
+	state->errcode = IMAGING_CODEC_CONFIG;
+	return 0;
+    }
+
+    ptr = buf;
+
+    while (bytes >= state->bytes) {
+
+	state->shuffle(ptr, (UINT8*) im->image[state->y + state->yoff] +
+		       state->xoff * im->pixelsize, state->xsize);
+
+	if (state->bytes > state->count)
+	    /* zero-pad the buffer, if necessary */
+	    memset(ptr + state->count, 0, state->bytes - state->count);
+
+	ptr += state->bytes;
+	bytes -= state->bytes;
+
+	state->y += state->ystep;
+
+	if (state->y < 0 || state->y >= state->ysize) {
+	    state->errcode = IMAGING_CODEC_END;
+	    break;
+	}
+
+    }
+
+    return ptr - buf;
+
+}