- p_vout->p_blend->fmt_in.video.i_x_offset = p_vout->i_crop_x;
- p_vout->p_blend->fmt_in.video.i_y_offset = p_vout->i_crop_y;
- p_vout->p_blend->fmt_in.video.i_visible_width =
- p_vout->i_crop_width;
- p_vout->p_blend->fmt_in.video.i_visible_height =
- p_vout->i_crop_height;
- i_x_offset += p_vout->i_crop_x;
- i_y_offset += p_vout->i_crop_y;
+ video_format_t *p_fmt = &p_vout->p_blend->fmt_in.video;
+
+ /* Find the intersection */
+ if( p_vout->i_crop_x + p_vout->i_crop_width <= i_x_offset ||
+ i_x_offset + (int)p_fmt->i_visible_width <
+ p_vout->i_crop_x ||
+ p_vout->i_crop_y + p_vout->i_crop_height <= i_y_offset ||
+ i_y_offset + (int)p_fmt->i_visible_height <
+ p_vout->i_crop_y )
+ {
+ /* No intersection */
+ p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
+ }
+ else
+ {
+ int i_x, i_y, i_x_end, i_y_end;
+ i_x = __MAX( p_vout->i_crop_x, i_x_offset );
+ i_y = __MAX( p_vout->i_crop_y, i_y_offset );
+ i_x_end = __MIN( p_vout->i_crop_x + p_vout->i_crop_width,
+ i_x_offset + (int)p_fmt->i_visible_width );
+ i_y_end = __MIN( p_vout->i_crop_y + p_vout->i_crop_height,
+ i_y_offset + (int)p_fmt->i_visible_height );
+
+ p_fmt->i_x_offset = i_x - i_x_offset;
+ p_fmt->i_y_offset = i_y - i_y_offset;
+ p_fmt->i_visible_width = i_x_end - i_x;
+ p_fmt->i_visible_height = i_y_end - i_y;
+
+ i_x_offset = i_x;
+ i_y_offset = i_y;
+ }