Various fixes for camera tracking stuff

- Fixed tooltip displaying for track sequence forwards in clip editor
- Corrected detection of 8 tracks so it wouldn't count tracks disabled
  on keyframes.
- Scale track preview to actual track widget size instead of scaling the
  whole preview image with given zoom ratio, so no extra memory needed to
  store zoomed margin would be used.
- Track's statistics text will fit pattern position instead of search if
  marker is disabled on current frame.
- Fixed toggle selection operator if selected track is hidden due to
  "Hide Disabled" policy.

1 files changed, 23 insertions, 19 deletions

diff --git a/source/blender/editors/interface/interface_draw.c b/source/blender/editors/interface/interface_draw.c
index 56f7fd04080..d79bc7d2974 100644
--- a/source/blender/editors/interface/interface_draw.c
+++ b/source/blender/editors/interface/interface_draw.c
@@ -1461,19 +1461,21 @@ void ui_draw_but_CURVE(ARegion *ar, uiBut *but, uiWidgetColors *wcol, rcti *rect
 	fdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 }
 
-static ImBuf *scale_trackpreview_ibuf(ImBuf *ibuf, float zoomx, float zoomy)
+static ImBuf *scale_trackpreview_ibuf(ImBuf *ibuf, float track_pos[2], int width, float height, int margin)
 {
 	ImBuf *scaleibuf;
-	int x, y, w= ibuf->x*zoomx, h= ibuf->y*zoomy;
-	const float scalex= 1.0f/zoomx;
-	const float scaley= 1.0f/zoomy;
+	const float scalex= ((float)ibuf->x-2*margin) / width;
+	const float scaley= ((float)ibuf->y-2*margin) / height;
+	float off_x= (int)track_pos[0]-track_pos[0]+0.5f;
+	float off_y= (int)track_pos[1]-track_pos[1]+0.5f;
+	int x, y;
 
-	scaleibuf= IMB_allocImBuf(w, h, 32, IB_rect);
+	scaleibuf= IMB_allocImBuf(width, height, 32, IB_rect);
 
-	for(y= 0; y<h; y++) {
-		for (x= 0; x<w; x++) {
-			float src_x= scalex*x;
-			float src_y= scaley*y;
+	for(y= 0; y<height; y++) {
+		for (x= 0; x<width; x++) {
+			float src_x= scalex*(x)+margin-off_x;
+			float src_y= scaley*(y)+margin-off_y;
 
 			bicubic_interpolation(ibuf, scaleibuf, src_x, src_y, x, y);
 		}
@@ -1504,7 +1506,7 @@ void ui_draw_but_TRACKPREVIEW(ARegion *ar, uiBut *but, uiWidgetColors *UNUSED(wc
 	if(scopes->track_disabled) {
 		glColor4f(0.7f, 0.3f, 0.3f, 0.3f);
 		uiSetRoundBox(15);
-		uiDrawBox(GL_POLYGON, rect.xmin-1, rect.ymin-1, rect.xmax+1, rect.ymax+1, 3.0f);
+		uiDrawBox(GL_POLYGON, rect.xmin-1, rect.ymin, rect.xmax+1, rect.ymax+1, 3.0f);
 
 		ok= 1;
 	}
@@ -1512,8 +1514,8 @@ void ui_draw_but_TRACKPREVIEW(ARegion *ar, uiBut *but, uiWidgetColors *UNUSED(wc
 		/* additional margin around image */
 		/* NOTE: should be kept in sync with value from BKE_movieclip_update_scopes */
 		const int margin= 3;
-		float zoomx, zoomy, track_pos[2], off_x, off_y, x0, y0;
-		int a;
+		float zoomx, zoomy, track_pos[2], off_x, off_y;
+		int a, width, height;
 		ImBuf *drawibuf;
 
 		glPushMatrix();
@@ -1524,16 +1526,18 @@ void ui_draw_but_TRACKPREVIEW(ARegion *ar, uiBut *but, uiWidgetColors *UNUSED(wc
 		/* draw content of pattern area */
 		glScissor(ar->winrct.xmin+rect.xmin, ar->winrct.ymin+rect.ymin, scissor[2], scissor[3]);
 
-		zoomx= (rect.xmax-rect.xmin) / (scopes->track_preview->x-2*margin);
-		zoomy= (rect.ymax-rect.ymin) / (scopes->track_preview->y-2*margin);
+		width= rect.xmax-rect.xmin+1;
+		height = rect.ymax-rect.ymin;
+
+		zoomx= (float)width / (scopes->track_preview->x-2*margin);
+		zoomy= (float)height / (scopes->track_preview->y-2*margin);
 
 		off_x= ((int)track_pos[0]-track_pos[0]+0.5)*zoomx;
 		off_y= ((int)track_pos[1]-track_pos[1]+0.5)*zoomy;
-		x0= (int)(off_x+rect.xmin-zoomx*(margin-0.5f))+1;
-		y0= (int)(off_y+rect.ymin-zoomy*(margin-0.5f))+1;
 
-		drawibuf= scale_trackpreview_ibuf(scopes->track_preview, zoomx, zoomy);
-		glaDrawPixelsSafe(x0, y0, rect.xmax-x0+1, rect.ymax-y0+1,
+		drawibuf= scale_trackpreview_ibuf(scopes->track_preview, track_pos, width, height, margin);
+
+		glaDrawPixelsSafe(rect.xmin, rect.ymin+1, drawibuf->x, drawibuf->y,
 		                  drawibuf->x, GL_RGBA, GL_UNSIGNED_BYTE, drawibuf->rect);
 		IMB_freeImBuf(drawibuf);
 
@@ -1568,7 +1572,7 @@ void ui_draw_but_TRACKPREVIEW(ARegion *ar, uiBut *but, uiWidgetColors *UNUSED(wc
 	if(!ok) {
 		glColor4f(0.f, 0.f, 0.f, 0.3f);
 		uiSetRoundBox(15);
-		uiDrawBox(GL_POLYGON, rect.xmin-1, rect.ymin-1, rect.xmax+1, rect.ymax+1, 3.0f);
+		uiDrawBox(GL_POLYGON, rect.xmin-1, rect.ymin, rect.xmax+1, rect.ymax+1, 3.0f);
 	}
 
 	/* outline, scale gripper */