diff -r 000000000000 -r 0e761a78d257 gst_plugins_base/gst/videoscale/vs_image.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/videoscale/vs_image.c	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,908 @@
+/*
+ * Image Scaling Functions
+ * Copyright (c) 2005 David A. Schleef <ds@schleef.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+
+#include "vs_scanline.h"
+#include "vs_image.h"
+
+#define ROUND_UP_2(x)  (((x)+1)&~1)
+#define ROUND_UP_4(x)  (((x)+3)&~3)
+#define ROUND_UP_8(x)  (((x)+7)&~7)
+
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+vs_image_scale_nearest_RGBA (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_RGBA (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, dest->width, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_RGBA (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = dest->width * 4;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_RGBA (tmp1, src->pixels, dest->width, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGBA (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGBA (tmp2,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_RGBA (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGBA (tmp1,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_RGBA (dest->pixels + i * dest->stride,
+            tmp2, tmp1, dest->width, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGBA (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_RGBA (tmp2,
+            src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+            x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_RGBA (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+
+void
+vs_image_scale_nearest_RGB (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_RGB (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, dest->width, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_RGB (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = dest->width * 3;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_RGB (tmp1, src->pixels, dest->width, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGB (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGB (tmp2,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_RGB (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGB (tmp1,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_RGB (dest->pixels + i * dest->stride,
+            tmp2, tmp1, dest->width, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGB (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_RGB (tmp2,
+            src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+            x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_RGB (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}
+
+/* YUYV */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_nearest_YUYV (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+  int n_quads;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  n_quads = ROUND_UP_2 (dest->width) / 2;
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_YUYV (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, n_quads, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_YUYV (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int n_quads;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = ROUND_UP_4 (dest->width * 2);
+  n_quads = ROUND_UP_2 (dest->width) / 2;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_YUYV (tmp1, src->pixels, n_quads, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_YUYV (tmp1, src->pixels + j * src->stride,
+            n_quads, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_YUYV (tmp2,
+              src->pixels + (j + 1) * src->stride, n_quads, &xacc, x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_YUYV (dest->pixels + i * dest->stride,
+            tmp1, tmp2, n_quads, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_YUYV (tmp1,
+              src->pixels + (j + 1) * src->stride, n_quads, &xacc, x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_YUYV (dest->pixels + i * dest->stride,
+            tmp2, tmp1, n_quads, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_YUYV (tmp1, src->pixels + j * src->stride,
+            n_quads, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_YUYV (tmp2,
+            src->pixels + (j + 1) * src->stride, n_quads, &xacc, x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_YUYV (dest->pixels + i * dest->stride,
+            tmp1, tmp2, n_quads, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}
+
+/* UYVY */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_nearest_UYVY (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+  int n_quads;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  n_quads = (dest->width + 1) / 2;
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_UYVY (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, n_quads, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_UYVY (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int n_quads;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = ROUND_UP_4 (dest->width * 2);
+  n_quads = ROUND_UP_2 (dest->width) / 2;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_UYVY (tmp1, src->pixels, n_quads, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_UYVY (tmp1, src->pixels + j * src->stride,
+            n_quads, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_UYVY (tmp2,
+              src->pixels + (j + 1) * src->stride, n_quads, &xacc, x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_UYVY (dest->pixels + i * dest->stride,
+            tmp1, tmp2, n_quads, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_UYVY (tmp1,
+              src->pixels + (j + 1) * src->stride, n_quads, &xacc, x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_UYVY (dest->pixels + i * dest->stride,
+            tmp2, tmp1, n_quads, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_UYVY (tmp1, src->pixels + j * src->stride,
+            n_quads, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_UYVY (tmp2,
+            src->pixels + (j + 1) * src->stride, n_quads, &xacc, x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_UYVY (dest->pixels + i * dest->stride,
+            tmp1, tmp2, n_quads, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}
+
+/* greyscale */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_nearest_Y (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_Y (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, dest->width, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_Y (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = dest->width;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_Y (tmp1, src->pixels, dest->width, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_Y (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_Y (tmp2,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_Y (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_Y (tmp1,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_Y (dest->pixels + i * dest->stride,
+            tmp2, tmp1, dest->width, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_Y (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_Y (tmp2,
+            src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+            x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_Y (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}
+
+/* RGB565 */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_nearest_RGB565 (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_RGB565 (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, dest->width, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_RGB565 (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = dest->width * 2;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_RGB565 (tmp1, src->pixels, dest->width, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGB565 (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGB565 (tmp2,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_RGB565 (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGB565 (tmp1,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_RGB565 (dest->pixels + i * dest->stride,
+            tmp2, tmp1, dest->width, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGB565 (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_RGB565 (tmp2,
+            src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+            x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_RGB565 (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}
+
+/* RGB555 */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_nearest_RGB555 (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  int i;
+  int j;
+  int x;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  acc = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    xacc = 0;
+    vs_scanline_resample_nearest_RGB555 (dest->pixels + i * dest->stride,
+        src->pixels + j * src->stride, dest->width, &xacc, x_increment);
+
+    acc += y_increment;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+void
+vs_image_scale_linear_RGB555 (const VSImage * dest, const VSImage * src,
+    uint8_t * tmpbuf)
+{
+  int acc;
+  int y_increment;
+  int x_increment;
+  uint8_t *tmp1;
+  uint8_t *tmp2;
+  int y1;
+  int y2;
+  int i;
+  int j;
+  int x;
+  int dest_size;
+  int xacc;
+
+  y_increment = ((src->height - 1) << 16) / (dest->height - 1);
+  x_increment = ((src->width - 1) << 16) / (dest->width - 1);
+
+  dest_size = dest->width * 2;
+
+  tmp1 = tmpbuf;
+  tmp2 = tmpbuf + dest_size;
+
+  acc = 0;
+  xacc = 0;
+  y2 = -1;
+  vs_scanline_resample_linear_RGB555 (tmp1, src->pixels, dest->width, &xacc,
+      x_increment);
+  y1 = 0;
+  for (i = 0; i < dest->height; i++) {
+    j = acc >> 16;
+    x = acc & 0xffff;
+
+    if (x == 0) {
+      if (j == y1) {
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      } else if (j == y2) {
+        memcpy (dest->pixels + i * dest->stride, tmp2, dest_size);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGB555 (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        memcpy (dest->pixels + i * dest->stride, tmp1, dest_size);
+      }
+    } else {
+      if (j == y1) {
+        if (j + 1 != y2) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGB555 (tmp2,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y2 = j + 1;
+        }
+        vs_scanline_merge_linear_RGB555 (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      } else if (j == y2) {
+        if (j + 1 != y1) {
+          xacc = 0;
+          vs_scanline_resample_linear_RGB555 (tmp1,
+              src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+              x_increment);
+          y1 = j + 1;
+        }
+        vs_scanline_merge_linear_RGB555 (dest->pixels + i * dest->stride,
+            tmp2, tmp1, dest->width, x);
+      } else {
+        xacc = 0;
+        vs_scanline_resample_linear_RGB555 (tmp1, src->pixels + j * src->stride,
+            dest->width, &xacc, x_increment);
+        y1 = j;
+        xacc = 0;
+        vs_scanline_resample_linear_RGB555 (tmp2,
+            src->pixels + (j + 1) * src->stride, dest->width, &xacc,
+            x_increment);
+        y2 = (j + 1);
+        vs_scanline_merge_linear_RGB555 (dest->pixels + i * dest->stride,
+            tmp1, tmp2, dest->width, x);
+      }
+    }
+
+    acc += y_increment;
+  }
+}