Sequencer: Add option to render OpenGL preview with DoF

The title says it all actually, controlled with DoF check box next to textured
solid check box.

Thanks Campbell for review!

5 files changed, 34 insertions, 7 deletions

diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index 0a87360e58d..2cc928117c5 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -376,6 +376,7 @@ enum {
 	/* Only works with ED_view3d_draw_offscreen_imbuf_simple(). */
 	V3D_OFSDRAW_USE_GPENCIL      = (1 << 2),
 	V3D_OFSDRAW_USE_SOLID_TEX    = (1 << 2),
+	V3D_OFSDRAW_USE_CAMERA_DOF   = (1 << 3),
 };
 
 struct ImBuf *ED_view3d_draw_offscreen_imbuf(
diff --git a/source/blender/editors/render/render_opengl.c b/source/blender/editors/render/render_opengl.c
index a2d34ffefa8..b7a23bafced 100644
--- a/source/blender/editors/render/render_opengl.c
+++ b/source/blender/editors/render/render_opengl.c
@@ -684,6 +684,11 @@ static bool screen_opengl_render_init(bContext *C, wmOperator *op)
 			oglrender->fx = GPU_fx_compositor_create();
 		}
 	}
+	else if (is_sequencer) {
+		if (scene->r.seq_flag & R_SEQ_CAMERA_DOF) {
+			oglrender->fx = GPU_fx_compositor_create();
+		}
+	}
 
 	/* create render */
 	oglrender->re = RE_NewSceneRender(scene);
diff --git a/source/blender/editors/space_sequencer/sequencer_draw.c b/source/blender/editors/space_sequencer/sequencer_draw.c
index 160aa157189..bb7e2d75482 100644
--- a/source/blender/editors/space_sequencer/sequencer_draw.c
+++ b/source/blender/editors/space_sequencer/sequencer_draw.c
@@ -60,6 +60,7 @@
 #include "BIF_glutil.h"
 
 #include "GPU_basic_shader.h"
+#include "GPU_compositing.h"
 
 #include "ED_anim_api.h"
 #include "ED_gpencil.h"
@@ -908,7 +909,7 @@ void ED_sequencer_special_preview_clear(void)
 
 ImBuf *sequencer_ibuf_get(struct Main *bmain, Scene *scene, SpaceSeq *sseq, int cfra, int frame_ofs, const char *viewname)
 {
-	SeqRenderData context;
+	SeqRenderData context = {0};
 	ImBuf *ibuf;
 	int rectx, recty;
 	float render_size;
@@ -935,6 +936,12 @@ ImBuf *sequencer_ibuf_get(struct Main *bmain, Scene *scene, SpaceSeq *sseq, int
 	        rectx, recty, proxy_size,
 	        &context);
 	context.view_id = BKE_scene_multiview_view_id_get(&scene->r, viewname);
+	if (scene->r.seq_flag & R_SEQ_CAMERA_DOF) {
+		if (sseq->compositor == NULL) {
+			sseq->compositor = GPU_fx_compositor_create();
+		}
+		context.gpu_fx = sseq->compositor;
+	}
 
 	/* sequencer could start rendering, in this case we need to be sure it wouldn't be canceled
 	 * by Esc pressed somewhere in the past
diff --git a/source/blender/editors/space_sequencer/space_sequencer.c b/source/blender/editors/space_sequencer/space_sequencer.c
index f1d0f23f8af..6b50d3fecdf 100644
--- a/source/blender/editors/space_sequencer/space_sequencer.c
+++ b/source/blender/editors/space_sequencer/space_sequencer.c
@@ -60,6 +60,8 @@
 
 #include "IMB_imbuf.h"
 
+#include "GPU_compositing.h"
+
 #include "sequencer_intern.h"   // own include
 
 /**************************** common state *****************************/
@@ -218,6 +220,11 @@ static void sequencer_free(SpaceLink *sl)
 
 	if (scopes->histogram_ibuf)
 		IMB_freeImBuf(scopes->histogram_ibuf);
+
+	if (sseq->compositor != NULL) {
+		GPU_fx_compositor_destroy(sseq->compositor);
+		sseq->compositor = NULL;
+	}
 }
 
 
diff --git a/source/blender/editors/space_view3d/view3d_draw.c b/source/blender/editors/space_view3d/view3d_draw.c
index 8fd38d6a8de..9e220f4b141 100644
--- a/source/blender/editors/space_view3d/view3d_draw.c
+++ b/source/blender/editors/space_view3d/view3d_draw.c
@@ -3473,15 +3473,22 @@ ImBuf *ED_view3d_draw_offscreen_imbuf_simple(
 	v3d.lay = scene->lay;
 	v3d.drawtype = drawtype;
 	v3d.flag2 = V3D_RENDER_OVERRIDE;
-	
-	if (draw_flags & V3D_OFSDRAW_USE_GPENCIL)
-		v3d.flag2 |= V3D_SHOW_GPENCIL;
 
-	if (draw_flags & V3D_OFSDRAW_USE_SOLID_TEX)
+	if (draw_flags & V3D_OFSDRAW_USE_GPENCIL) {
+		v3d.flag2 |= V3D_SHOW_GPENCIL;
+	}
+	if (draw_flags & V3D_OFSDRAW_USE_SOLID_TEX) {
 		v3d.flag2 |= V3D_SOLID_TEX;
-		
-	if (draw_flags & V3D_OFSDRAW_USE_BACKGROUND)
+	}
+	if (draw_flags & V3D_OFSDRAW_USE_BACKGROUND) {
 		v3d.flag3 |= V3D_SHOW_WORLD;
+	}
+	if (draw_flags & V3D_OFSDRAW_USE_CAMERA_DOF) {
+		if (camera->type == OB_CAMERA) {
+			v3d.fx_settings.dof = &((Camera *)camera->data)->gpu_dof;
+			v3d.fx_settings.fx_flag |= GPU_FX_FLAG_DOF;
+		}
+	}
 
 	rv3d.persp = RV3D_CAMOB;