Author: post
Date: 2009-06-27 19:51:58 +0200 (Sat, 27 Jun 2009)
New Revision: 2518
Modified:
trunk/plugins/rotate/rotate.c
Log:
Rotate: No interpolation on 90, 180 and 270 degree turn.
Modified: trunk/plugins/rotate/rotate.c
===================================================================
--- trunk/plugins/rotate/rotate.c 2009-06-27 15:43:57 UTC (rev 2517)
+++ trunk/plugins/rotate/rotate.c 2009-06-27 17:51:58 UTC (rev 2518)
@@ -61,6 +61,7 @@
static void set_property (GObject *object, guint property_id, const GValue
*value, GParamSpec *pspec);
static void previous_changed(RSFilter *filter, RSFilter *parent,
RSFilterChangedMask mask);
static RS_IMAGE16 *get_image(RSFilter *filter, RS_FILTER_PARAM *param);
+static RS_IMAGE16 *turn_right_angle(RS_IMAGE16 *in, const int direction);
static gint get_width(RSFilter *filter);
static gint get_height(RSFilter *filter);
static void inline bilinear(RS_IMAGE16 *in, gushort *out, gint x, gint y);
@@ -192,6 +193,13 @@
if ((rotate->angle < 0.001) && (rotate->orientation==0))
return input;
+ if ((rotate->angle < 0.001) && (rotate->orientation < 4))
+ {
+ output = turn_right_angle(input, rotate->orientation);
+ g_object_unref(input);
+ return output;
+ }
+
recalculate(rotate);
output = rs_image16_new(rotate->new_width, rotate->new_height, 3, 4);
@@ -344,3 +352,67 @@
rotate->dirty = FALSE;
}
+
+static RS_IMAGE16 * turn_right_angle(RS_IMAGE16 *in, const int direction)
+{
+ RS_IMAGE16 *out = NULL;
+ int dstp_offset, x, y, p;
+
+ if (direction == 1) /* Rotate Left */
+ {
+ out = rs_image16_new(in->h, in->w, 3, in->pixelsize);
+ p = out->pitch * out->pixelsize;
+ gushort *dstp = GET_PIXEL(out, 0, 0);
+ for (y = 0; y < in->h; y++)
+ {
+ gushort *srcp = GET_PIXEL(in, 0, y);
+ dstp_offset = (in->h - 1 - y) * in->pixelsize;
+ for (x = 0; x < in->w * in->pixelsize; x +=
in->pixelsize)
+ {
+ dstp[dstp_offset] = srcp[x];
+ dstp[dstp_offset + 1] = srcp[x + 1];
+ dstp[dstp_offset + 2] = srcp[x + 2];
+ dstp_offset += p;
+ }
+ }
+ }
+
+ if (direction == 3) /* Rotate Right */
+ {
+ out = rs_image16_new(in->h, in->w, 3, in->pixelsize);
+ p = out->pitch * out->pixelsize;
+ gushort *dstp = GET_PIXEL(out, 0, in->w - 1);
+ for (y = 0; y < in->h; y++)
+ {
+ gushort *srcp = GET_PIXEL(in, 0, y);
+ dstp_offset = y * in->pixelsize;
+ for (x = 0; x < in->w * in->pixelsize; x +=
in->pixelsize)
+ {
+ dstp[dstp_offset] = srcp[x];
+ dstp[dstp_offset + 1] = srcp[x + 1];
+ dstp[dstp_offset + 2] = srcp[x + 2];
+ dstp_offset -= p;
+ }
+ }
+ }
+
+ if (direction == 2) /* Rotate 180 */
+ {
+ out = rs_image16_new(in->w, in->h, 3, in->pixelsize);
+ for (y = 0; y < in->h; y++)
+ {
+ gushort *srcp = GET_PIXEL(in, 0, y);
+ gushort *dstp = GET_PIXEL(out, in->w - 1, in->h - 1 -
y);
+ dstp_offset = 0;
+ for (x = 0; x < in->w * in->pixelsize; x +=
in->pixelsize)
+ {
+ dstp[dstp_offset] = srcp[x];
+ dstp[dstp_offset + 1] = srcp[x + 1];
+ dstp[dstp_offset + 2] = srcp[x + 2];
+ dstp_offset -= in->pixelsize;
+ }
+ }
+ }
+
+ return out;
+}
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