Viewport compositing - first code

This commit introduces a few ready made effects for the 3D viewport
and OpenGL rendering.

Included effects are Depth of Field, accessible from camera view
and screen space ambient occlusion. Those effects can be turned on and
tweaked from the shading panel in the 3D viewport.

Off screen rendering will use the settings of the current camera.

WIP documentation can be found here:

http://wiki.blender.org/index.php/User:Psy-Fi/Framebuffer_Post-processing

4 files changed, 50 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_camera.h b/source/blender/blenkernel/BKE_camera.h
index 26d4986d93e..77296920ee2 100644
--- a/source/blender/blenkernel/BKE_camera.h
+++ b/source/blender/blenkernel/BKE_camera.h
@@ -46,6 +46,7 @@ struct RenderData;
 struct Scene;
 struct rctf;
 struct View3D;
+struct GPUFXSettings;
 
 /* Camera Datablock */
 
@@ -122,6 +123,8 @@ bool BKE_camera_view_frame_fit_to_scene(struct Scene *scene, struct View3D *v3d,
 bool BKE_camera_view_frame_fit_to_coords(struct Scene *scene, float (*cos)[3], int num_cos,
                                          struct Object *camera_ob, float r_co[3], float *r_scale);
 
+void BKE_camera_to_gpu_dof(struct Object *camera, struct GPUFXSettings *r_fx_settings);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/blender/blenkernel/BKE_screen.h b/source/blender/blenkernel/BKE_screen.h
index 3eb6ba7b6fa..29590c52b23 100644
--- a/source/blender/blenkernel/BKE_screen.h
+++ b/source/blender/blenkernel/BKE_screen.h
@@ -52,6 +52,7 @@ struct wmKeyConfig;
 struct wmNotifier;
 struct wmWindow;
 struct wmWindowManager;
+struct GPUFXSettings;
 
 #include "BLI_compiler_attrs.h"
 
@@ -294,6 +295,7 @@ void BKE_screen_view3d_scene_sync(struct bScreen *sc);
 void BKE_screen_view3d_main_sync(ListBase *screen_lb, struct Scene *scene);
 void BKE_screen_view3d_twmode_remove(struct View3D *v3d, const int i);
 void BKE_screen_view3d_main_twmode_remove(ListBase *screen_lb, struct Scene *scene, const int i);
+void BKE_screen_gpu_fx_validate(struct GPUFXSettings *fx_settings);
 
 /* zoom factor conversion */
 float BKE_screen_view3d_zoom_to_fac(float camzoom);
diff --git a/source/blender/blenkernel/intern/camera.c b/source/blender/blenkernel/intern/camera.c
index e424823d8dc..e1d771dad65 100644
--- a/source/blender/blenkernel/intern/camera.c
+++ b/source/blender/blenkernel/intern/camera.c
@@ -49,6 +49,8 @@
 #include "BKE_main.h"
 #include "BKE_screen.h"
 
+#include "GPU_compositing.h"
+
 /****************************** Camera Datablock *****************************/
 
 void *BKE_camera_add(Main *bmain, const char *name)
@@ -66,7 +68,9 @@ void *BKE_camera_add(Main *bmain, const char *name)
 	cam->ortho_scale = 6.0;
 	cam->flag |= CAM_SHOWPASSEPARTOUT;
 	cam->passepartalpha = 0.5f;
-	
+
+	GPU_fx_compositor_init_dof_settings(&cam->gpu_dof);
+
 	return cam;
 }
 
@@ -686,3 +690,18 @@ bool BKE_camera_view_frame_fit_to_coords(
 	return camera_frame_fit_calc_from_data(&params, &data_cb, r_co, r_scale);
 }
 
+void BKE_camera_to_gpu_dof(struct Object *camera, struct GPUFXSettings *r_fx_settings)
+{
+	if (camera->type == OB_CAMERA) {
+		Camera *cam = camera->data;
+		r_fx_settings->dof = &cam->gpu_dof;
+		r_fx_settings->dof->focal_length = cam->lens;
+		r_fx_settings->dof->sensor = BKE_camera_sensor_size(cam->sensor_fit, cam->sensor_x, cam->sensor_y);
+		if (cam->dof_ob) {
+			r_fx_settings->dof->focus_distance = len_v3v3(cam->dof_ob->obmat[3], camera->obmat[3]);
+		}
+		else {
+			r_fx_settings->dof->focus_distance = cam->YF_dofdist;
+		}
+	}
+}
diff --git a/source/blender/blenkernel/intern/screen.c b/source/blender/blenkernel/intern/screen.c
index c9dba38b713..a6ac4551f4a 100644
--- a/source/blender/blenkernel/intern/screen.c
+++ b/source/blender/blenkernel/intern/screen.c
@@ -39,6 +39,8 @@
 
 #include "MEM_guardedalloc.h"
 
+#include "GPU_compositing.h"
+
 #include "DNA_scene_types.h"
 #include "DNA_screen_types.h"
 #include "DNA_space_types.h"
@@ -598,3 +600,26 @@ float BKE_screen_view3d_zoom_from_fac(float zoomfac)
 {
 	return ((sqrtf(4.0f * zoomfac) - (float)M_SQRT2) * 50.0f);
 }
+
+void BKE_screen_gpu_fx_validate(GPUFXSettings *fx_settings)
+{
+	/* currently we use DOF from the camera _only_,
+	 * so we never allocate this, only copy from the Camera */
+#if 0
+	if ((fx_settings->dof == NULL) &&
+	    (fx_settings->fx_flag & GPU_FX_FLAG_DOF))
+	{
+		GPUDOFSettings *fx_dof;
+		fx_dof = fx_settings->dof = MEM_callocN(sizeof(GPUDOFSettings), __func__);
+	}
+#endif
+
+	if ((fx_settings->ssao == NULL) &&
+	    (fx_settings->fx_flag & GPU_FX_FLAG_SSAO))
+	{
+		GPUSSAOSettings *fx_ssao;
+		fx_ssao = fx_settings->ssao = MEM_callocN(sizeof(GPUSSAOSettings), __func__);
+
+		GPU_fx_compositor_init_ssao_settings(fx_ssao);
+	}
+}