We're now doing final conversions... float exrs to dpx amd png. Found a

couple of bugs in the new float support in sequencer;

- when effects have float buffer input, the effect strip itself only got
  byte buffers assigned, which bypassed the float versions of effects
- the float version of cross effect used ints to fade... should be float
- tests if an effect should be recalculated didn't check for float yet
- display of float buffer in sequencer preview showed black when no
  byte rect was in imbuf

Peter; we need this urgent, so I commit now.. check if this is according
to how you thought floatbuffers to work? thanks!

source/blender/src/drawseq.c

@@ -588,7 +588,12 @@ static void draw_image_seq(ScrArea *sa)
 			else ibuf= se->ibuf;
 		}
 	}
-	if(ibuf==0 || ibuf->rect==0) return;
+	if(ibuf==NULL) 
+		return;
+	if(ibuf->rect_float && ibuf->rect==NULL)
+		IMB_rect_from_float(ibuf);
+	if(ibuf->rect==NULL) 
+		return;
 
 	if (sseq->mainb == SEQ_DRAW_IMG_WAVEFORM) {
 		ibuf = make_waveform_view_from_ibuf(ibuf);

source/blender/src/seqeffects.c

@@ -646,9 +646,9 @@ void do_cross_effect_byte(float facf0, float facf1, int x, int y,
 }
 
 void do_cross_effect_float(float facf0, float facf1, int x, int y, 
-			   float*rect1, float *rect2, float *out)
+			   float *rect1, float *rect2, float *out)
 {
-	int fac1, fac2, fac3, fac4;
+	float fac1, fac2, fac3, fac4;
 	int xo;
 	float *rt1, *rt2, *rt;
 

source/blender/src/sequence.c

@@ -780,7 +780,7 @@ static void do_build_seq_ibuf(Sequence * seq, int cfra)
 			
 			/* test if image is too small or discarded from cache: reload */
 			if(se->ibuf) {
-				if(se->ibuf->x < seqrectx || se->ibuf->y < seqrecty || !se->ibuf->rect) {
+				if(se->ibuf->x < seqrectx || se->ibuf->y < seqrecty || !(se->ibuf->rect || se->ibuf->rect_float)) {
 					IMB_freeImBuf(se->ibuf);
 					se->ibuf= 0;
 				}
@@ -796,8 +796,13 @@ static void do_build_seq_ibuf(Sequence * seq, int cfra)
 				se->se2= seq->seq2->curelem;
 				se->se3= seq->seq3->curelem;
 				
-				if(se->ibuf==0) {
-					se->ibuf= IMB_allocImBuf((short)seqrectx, (short)seqrecty, 32, IB_rect, 0);
+				if(se->ibuf==NULL) {
+					/* if one of two first inputs are rectfloat, output is float too */
+					if((se->se1->ibuf && se->se1->ibuf->rect_float) ||
+					   (se->se2->ibuf && se->se2->ibuf->rect_float))
+						se->ibuf= IMB_allocImBuf((short)seqrectx, (short)seqrecty, 32, IB_rectfloat, 0);
+					else
+						se->ibuf= IMB_allocImBuf((short)seqrectx, (short)seqrecty, 32, IB_rect, 0);
 				}
 				do_effect(cfra, seq, se);
 			}
@@ -817,7 +822,7 @@ static void do_build_seq_ibuf(Sequence * seq, int cfra)
 			if(se->ibuf) {
 				/* test if image too small 
 				   or discarded from cache: reload */
-				if(se->ibuf->x < seqrectx || se->ibuf->y < seqrecty || !se->ibuf->rect) {
+				if(se->ibuf->x < seqrectx || se->ibuf->y < seqrecty || !(se->ibuf->rect || se->ibuf->rect_float)) {
 					IMB_freeImBuf(se->ibuf);
 					se->ibuf= 0;
 					se->ok= 1;