Peach request

new option for the image sequencer's image strips, flip x/y, (useful when making animatics to test the direction characters walk across the screen)
added IMB_flipy was alredy there, needed to add IMB_flipx.

2 files changed, 34 insertions, 0 deletions

diff --git a/source/blender/imbuf/IMB_imbuf.h b/source/blender/imbuf/IMB_imbuf.h
index e56fb5a776d..11cdebe70c3 100644
--- a/source/blender/imbuf/IMB_imbuf.h
+++ b/source/blender/imbuf/IMB_imbuf.h
@@ -418,6 +418,14 @@ void bilinear_interpolation(struct ImBuf *in, struct ImBuf *out, float u, float
 void IMB_convert_bgra_to_rgba(int size, unsigned int *rect);
 
 /**
+ * Flip the image X/Y
+ *
+ * @attention Defined in imageprocess.c
+ */
+void IMB_xflip(struct ImBuf *ibuf);
+void IMB_yflip(struct ImBuf *ibuf);
+
+/**
  *
  * @attention defined in scaling.c
  */
diff --git a/source/blender/imbuf/intern/rotate.c b/source/blender/imbuf/intern/rotate.c
index 13edfbf0a33..4654dd6aefa 100644
--- a/source/blender/imbuf/intern/rotate.c
+++ b/source/blender/imbuf/intern/rotate.c
@@ -86,3 +86,29 @@ void IMB_flipy(struct ImBuf * ibuf)
 	MEM_freeN(line);
 	if(linef) MEM_freeN(linef);
 }
+
+void IMB_flipx(struct ImBuf * ibuf)
+{
+	short x, y, xr, xl, yi;
+	unsigned int px;
+	float px_f[4];
+	
+	if (ibuf == NULL) return;
+	if (ibuf->rect == NULL) return;
+
+	x = ibuf->x;
+	y = ibuf->y;
+	for(yi=y-1;yi>=0;yi--) {
+		for(xr=x-1, xl=0; xr>=xl; xr--, xl++) {
+			px =					ibuf->rect[(x*yi)+xr];
+			ibuf->rect[(x*yi)+xr] =	ibuf->rect[(x*yi)+xl];
+			ibuf->rect[(x*yi)+xl] =	px;		
+			
+			if (ibuf->rect_float) {
+				memcpy(&px_f, &ibuf->rect_float[((x*yi)+xr)*4], 4*sizeof(float));
+				memcpy(&ibuf->rect_float[((x*yi)+xr)*4], &ibuf->rect_float[((x*yi)+xl)*4], 4*sizeof(float));
+				memcpy(&ibuf->rect_float[((x*yi)+xl)*4], &px_f, 4*sizeof(float));
+			}
+		}
+	}
+}