2 files changed, 20 insertions, 1 deletions
diff --git a/source/blender/editors/space_sequencer/sequencer_draw.c b/source/blender/editors/space_sequencer/sequencer_draw.c
index 995e980aba0..4b76f1432ee 100644
--- a/source/blender/editors/space_sequencer/sequencer_draw.c
+++ b/source/blender/editors/space_sequencer/sequencer_draw.c
@@ -50,12 +50,14 @@
 #include "IMB_colormanagement.h"
 #include "IMB_imbuf.h"
 
+#include "GPU_batch_presets.h"
 #include "GPU_framebuffer.h"
 #include "GPU_immediate.h"
 #include "GPU_immediate_util.h"
 #include "GPU_matrix.h"
 #include "GPU_state.h"
 #include "GPU_vertex_buffer.h"
+#include "GPU_viewport.h"
 
 #include "ED_anim_api.h"
 #include "ED_gpencil.h"
@@ -1537,7 +1539,7 @@ static void sequencer_preview_clear(void)
   float col[3];
 
   UI_GetThemeColor3fv(TH_SEQ_PREVIEW, col);
-  GPU_clear_color(col[0], col[1], col[2], 0.0);
+  GPU_clear_color(col[0], col[1], col[2], 1.0);
   GPU_clear(GPU_COLOR_BIT);
 }
 
@@ -1775,6 +1777,14 @@ void sequencer_draw_preview(const bContext *C,
     return;
   }
 
+  /* Setup offscreen buffers. */
+  GPUViewport *viewport = WM_draw_region_get_viewport(region);
+
+  GPUFrameBuffer *framebuffer_overlay = GPU_viewport_framebuffer_overlay_get(viewport);
+  GPU_framebuffer_bind_no_srgb(framebuffer_overlay);
+  GPU_batch_presets_reset();
+  GPU_depth_test(false);
+
   if (sseq->render_size == SEQ_PROXY_RENDER_SIZE_NONE) {
     sequencer_preview_clear();
     return;
@@ -1798,6 +1808,9 @@ void sequencer_draw_preview(const bContext *C,
   ibuf = sequencer_ibuf_get(
       bmain, depsgraph, scene, sseq, cfra, frame_ofs, names[sseq->multiview_eye]);
 
+  /* sequencer_ibuf_get can call GPU_framebuffer_bind. So disable srgb framebuffer again. */
+  GPU_framebuffer_bind_no_srgb(framebuffer_overlay);
+
   if (ibuf) {
     scope = sequencer_get_scope(scene, sseq, ibuf, draw_backdrop);
 
diff --git a/source/blender/editors/space_sequencer/sequencer_edit.c b/source/blender/editors/space_sequencer/sequencer_edit.c
index b2d0362602e..bab099a77c1 100644
--- a/source/blender/editors/space_sequencer/sequencer_edit.c
+++ b/source/blender/editors/space_sequencer/sequencer_edit.c
@@ -2751,6 +2751,8 @@ static int sequencer_separate_images_exec(bContext *C, wmOperator *op)
 
   seq = ed->seqbasep->first; /* Poll checks this is valid. */
 
+  BKE_sequencer_prefetch_stop(scene);
+
   while (seq) {
     if ((seq->flag & SELECT) && (seq->type == SEQ_TYPE_IMAGE) && (seq->len > 1)) {
       Sequence *seq_next;
@@ -2946,6 +2948,8 @@ static int sequencer_meta_make_exec(bContext *C, wmOperator *op)
     return OPERATOR_CANCELLED;
   }
 
+  BKE_sequencer_prefetch_stop(scene);
+
   /* Remove all selected from main list, and put in meta. */
 
   seqm = BKE_sequence_alloc(ed->seqbasep, 1, 1, SEQ_TYPE_META); /* Channel number set later. */
@@ -3031,6 +3035,8 @@ static int sequencer_meta_separate_exec(bContext *C, wmOperator *UNUSED(op))
     return OPERATOR_CANCELLED;
   }
 
+  BKE_sequencer_prefetch_stop(scene);
+
   for (seq = last_seq->seqbase.first; seq != NULL; seq = seq->next) {
     BKE_sequence_invalidate_cache_composite(scene, seq);
   }