diff options
Diffstat (limited to 'source/blender/draw/engines/eevee/eevee_depth_of_field.c')
| -rw-r--r-- | source/blender/draw/engines/eevee/eevee_depth_of_field.c | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee/eevee_depth_of_field.c b/source/blender/draw/engines/eevee/eevee_depth_of_field.c new file mode 100644 index 00000000000..f5fc79aba4f --- /dev/null +++ b/source/blender/draw/engines/eevee/eevee_depth_of_field.c @@ -0,0 +1,297 @@ +/* + * Copyright 2016, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Contributor(s): Blender Institute + * + */ + +/** \file eevee_depth_of_field.c + * \ingroup draw_engine + * + * Depth of field post process effect. + */ + +#include "DRW_render.h" + +#include "BLI_dynstr.h" +#include "BLI_rand.h" + +#include "DNA_anim_types.h" +#include "DNA_camera_types.h" +#include "DNA_object_force.h" +#include "DNA_screen_types.h" +#include "DNA_view3d_types.h" +#include "DNA_world_types.h" + +#include "BKE_global.h" /* for G.debug_value */ +#include "BKE_camera.h" +#include "BKE_mesh.h" +#include "BKE_object.h" +#include "BKE_animsys.h" +#include "BKE_screen.h" + +#include "DEG_depsgraph.h" +#include "DEG_depsgraph_query.h" + +#include "eevee_private.h" +#include "GPU_extensions.h" +#include "GPU_framebuffer.h" +#include "GPU_texture.h" + +#include "ED_screen.h" + +static struct { + /* Depth Of Field */ + struct GPUShader *dof_downsample_sh; + struct GPUShader *dof_scatter_sh; + struct GPUShader *dof_resolve_sh; +} e_data = {NULL}; /* Engine data */ + +extern char datatoc_effect_dof_vert_glsl[]; +extern char datatoc_effect_dof_geom_glsl[]; +extern char datatoc_effect_dof_frag_glsl[]; + +static void eevee_create_shader_depth_of_field(void) +{ + e_data.dof_downsample_sh = DRW_shader_create(datatoc_effect_dof_vert_glsl, NULL, + datatoc_effect_dof_frag_glsl, "#define STEP_DOWNSAMPLE\n"); + e_data.dof_scatter_sh = DRW_shader_create(datatoc_effect_dof_vert_glsl, NULL, + datatoc_effect_dof_frag_glsl, "#define STEP_SCATTER\n"); + e_data.dof_resolve_sh = DRW_shader_create(datatoc_effect_dof_vert_glsl, NULL, + datatoc_effect_dof_frag_glsl, "#define STEP_RESOLVE\n"); +} + +int EEVEE_depth_of_field_init(EEVEE_ViewLayerData *UNUSED(sldata), EEVEE_Data *vedata, Object *camera) +{ + EEVEE_StorageList *stl = vedata->stl; + EEVEE_FramebufferList *fbl = vedata->fbl; + EEVEE_TextureList *txl = vedata->txl; + EEVEE_EffectsInfo *effects = stl->effects; + + const DRWContextState *draw_ctx = DRW_context_state_get(); + ViewLayer *view_layer = draw_ctx->view_layer; + IDProperty *props = BKE_view_layer_engine_evaluated_get(view_layer, COLLECTION_MODE_NONE, RE_engine_id_BLENDER_EEVEE); + + if (BKE_collection_engine_property_value_get_bool(props, "dof_enable")) { + Scene *scene = draw_ctx->scene; + RegionView3D *rv3d = draw_ctx->rv3d; + + if (!e_data.dof_downsample_sh) { + eevee_create_shader_depth_of_field(); + } + + if (camera) { + const float *viewport_size = DRW_viewport_size_get(); + Camera *cam = (Camera *)camera->data; + + /* Retreive Near and Far distance */ + effects->dof_near_far[0] = -cam->clipsta; + effects->dof_near_far[1] = -cam->clipend; + + int buffer_size[2] = {(int)viewport_size[0] / 2, (int)viewport_size[1] / 2}; + + /* Reuse buffer from Bloom if available */ + /* WATCH IT : must have the same size */ + struct GPUTexture **dof_down_near; + + if ((effects->enabled_effects & EFFECT_BLOOM) != 0) { + dof_down_near = &txl->bloom_downsample[0]; + } + else { + dof_down_near = &txl->dof_down_near; + } + + /* Setup buffers */ + DRWFboTexture tex_down[3] = { + {dof_down_near, DRW_TEX_RGB_11_11_10, DRW_TEX_FILTER}, /* filter to not interfeer with bloom */ + {&txl->dof_down_far, DRW_TEX_RGB_11_11_10, 0}, + {&txl->dof_coc, DRW_TEX_RG_16, 0}, + }; + DRW_framebuffer_init( + &fbl->dof_down_fb, &draw_engine_eevee_type, + buffer_size[0], buffer_size[1], tex_down, 3); + + /* Go full 32bits for rendering and reduce the color artifacts. */ + DRWTextureFormat fb_format = DRW_state_is_image_render() ? DRW_TEX_RGBA_32 : DRW_TEX_RGBA_16; + + DRWFboTexture tex_scatter_far = {&txl->dof_far_blur, fb_format, DRW_TEX_FILTER}; + DRW_framebuffer_init( + &fbl->dof_scatter_far_fb, &draw_engine_eevee_type, + buffer_size[0], buffer_size[1], &tex_scatter_far, 1); + + DRWFboTexture tex_scatter_near = {&txl->dof_near_blur, fb_format, DRW_TEX_FILTER}; + DRW_framebuffer_init( + &fbl->dof_scatter_near_fb, &draw_engine_eevee_type, + buffer_size[0], buffer_size[1], &tex_scatter_near, 1); + + /* Parameters */ + /* TODO UI Options */ + float fstop = cam->gpu_dof.fstop; + float blades = cam->gpu_dof.num_blades; + float rotation = cam->gpu_dof.rotation; + float ratio = 1.0f / cam->gpu_dof.ratio; + float sensor = BKE_camera_sensor_size(cam->sensor_fit, cam->sensor_x, cam->sensor_y); + float focus_dist = BKE_camera_object_dof_distance(camera); + float focal_len = cam->lens; + + UNUSED_VARS(rotation, ratio); + + /* this is factor that converts to the scene scale. focal length and sensor are expressed in mm + * unit.scale_length is how many meters per blender unit we have. We want to convert to blender units though + * because the shader reads coordinates in world space, which is in blender units. + * Note however that focus_distance is already in blender units and shall not be scaled here (see T48157). */ + float scale = (scene->unit.system) ? scene->unit.scale_length : 1.0f; + float scale_camera = 0.001f / scale; + /* we want radius here for the aperture number */ + float aperture = 0.5f * scale_camera * focal_len / fstop; + float focal_len_scaled = scale_camera * focal_len; + float sensor_scaled = scale_camera * sensor; + + if (rv3d != NULL) { + sensor_scaled *= rv3d->viewcamtexcofac[0]; + } + + effects->dof_params[0] = aperture * fabsf(focal_len_scaled / (focus_dist - focal_len_scaled)); + effects->dof_params[1] = -focus_dist; + effects->dof_params[2] = viewport_size[0] / sensor_scaled; + effects->dof_bokeh[0] = blades; + effects->dof_bokeh[1] = rotation; + effects->dof_bokeh[2] = ratio; + effects->dof_bokeh[3] = BKE_collection_engine_property_value_get_float(props, "bokeh_max_size"); + + return EFFECT_DOF | EFFECT_POST_BUFFER; + } + } + + /* Cleanup to release memory */ + DRW_TEXTURE_FREE_SAFE(txl->dof_down_near); + DRW_TEXTURE_FREE_SAFE(txl->dof_down_far); + DRW_TEXTURE_FREE_SAFE(txl->dof_coc); + DRW_TEXTURE_FREE_SAFE(txl->dof_far_blur); + DRW_TEXTURE_FREE_SAFE(txl->dof_near_blur); + DRW_FRAMEBUFFER_FREE_SAFE(fbl->dof_down_fb); + DRW_FRAMEBUFFER_FREE_SAFE(fbl->dof_scatter_far_fb); + DRW_FRAMEBUFFER_FREE_SAFE(fbl->dof_scatter_near_fb); + + return 0; +} + +void EEVEE_depth_of_field_cache_init(EEVEE_ViewLayerData *UNUSED(sldata), EEVEE_Data *vedata) +{ + EEVEE_PassList *psl = vedata->psl; + EEVEE_StorageList *stl = vedata->stl; + EEVEE_TextureList *txl = vedata->txl; + EEVEE_EffectsInfo *effects = stl->effects; + DefaultTextureList *dtxl = DRW_viewport_texture_list_get(); + + if ((effects->enabled_effects & EFFECT_DOF) != 0) { + /** Depth of Field algorithm + * + * Overview : + * - Downsample the color buffer into 2 buffers weighted with + * CoC values. Also output CoC into a texture. + * - Shoot quads for every pixel and expand it depending on the CoC. + * Do one pass for near Dof and one pass for far Dof. + * - Finally composite the 2 blurred buffers with the original render. + **/ + DRWShadingGroup *grp; + struct Gwn_Batch *quad = DRW_cache_fullscreen_quad_get(); + + psl->dof_down = DRW_pass_create("DoF Downsample", DRW_STATE_WRITE_COLOR); + + grp = DRW_shgroup_create(e_data.dof_downsample_sh, psl->dof_down); + DRW_shgroup_uniform_buffer(grp, "colorBuffer", &effects->source_buffer); + DRW_shgroup_uniform_buffer(grp, "depthBuffer", &dtxl->depth); + DRW_shgroup_uniform_vec2(grp, "nearFar", effects->dof_near_far, 1); + DRW_shgroup_uniform_vec3(grp, "dofParams", effects->dof_params, 1); + DRW_shgroup_call_add(grp, quad, NULL); + + psl->dof_scatter = DRW_pass_create("DoF Scatter", DRW_STATE_WRITE_COLOR | DRW_STATE_ADDITIVE_FULL); + + /* This create an empty batch of N triangles to be positioned + * by the vertex shader 0.4ms against 6ms with instancing */ + const float *viewport_size = DRW_viewport_size_get(); + const int sprite_ct = ((int)viewport_size[0] / 2) * ((int)viewport_size[1] / 2); /* brackets matters */ + grp = DRW_shgroup_empty_tri_batch_create(e_data.dof_scatter_sh, psl->dof_scatter, sprite_ct); + + DRW_shgroup_uniform_buffer(grp, "colorBuffer", &effects->unf_source_buffer); + DRW_shgroup_uniform_buffer(grp, "cocBuffer", &txl->dof_coc); + DRW_shgroup_uniform_vec2(grp, "layerSelection", effects->dof_layer_select, 1); + DRW_shgroup_uniform_vec4(grp, "bokehParams", effects->dof_bokeh, 1); + + psl->dof_resolve = DRW_pass_create("DoF Resolve", DRW_STATE_WRITE_COLOR); + + grp = DRW_shgroup_create(e_data.dof_resolve_sh, psl->dof_resolve); + DRW_shgroup_uniform_buffer(grp, "colorBuffer", &effects->source_buffer); + DRW_shgroup_uniform_buffer(grp, "nearBuffer", &txl->dof_near_blur); + DRW_shgroup_uniform_buffer(grp, "farBuffer", &txl->dof_far_blur); + DRW_shgroup_uniform_buffer(grp, "depthBuffer", &dtxl->depth); + DRW_shgroup_uniform_vec2(grp, "nearFar", effects->dof_near_far, 1); + DRW_shgroup_uniform_vec3(grp, "dofParams", effects->dof_params, 1); + DRW_shgroup_call_add(grp, quad, NULL); + } +} + +void EEVEE_depth_of_field_draw(EEVEE_Data *vedata) +{ + EEVEE_PassList *psl = vedata->psl; + EEVEE_TextureList *txl = vedata->txl; + EEVEE_FramebufferList *fbl = vedata->fbl; + EEVEE_StorageList *stl = vedata->stl; + EEVEE_EffectsInfo *effects = stl->effects; + + /* Depth Of Field */ + if ((effects->enabled_effects & EFFECT_DOF) != 0) { + float clear_col[4] = {0.0f, 0.0f, 0.0f, 0.0f}; + + /* Downsample */ + DRW_framebuffer_bind(fbl->dof_down_fb); + DRW_draw_pass(psl->dof_down); + + /* Scatter Far */ + effects->unf_source_buffer = txl->dof_down_far; + copy_v2_fl2(effects->dof_layer_select, 0.0f, 1.0f); + DRW_framebuffer_bind(fbl->dof_scatter_far_fb); + DRW_framebuffer_clear(true, false, false, clear_col, 0.0f); + DRW_draw_pass(psl->dof_scatter); + + /* Scatter Near */ + if ((effects->enabled_effects & EFFECT_BLOOM) != 0) { + /* Reuse bloom half res buffer */ + effects->unf_source_buffer = txl->bloom_downsample[0]; + } + else { + effects->unf_source_buffer = txl->dof_down_near; + } + copy_v2_fl2(effects->dof_layer_select, 1.0f, 0.0f); + DRW_framebuffer_bind(fbl->dof_scatter_near_fb); + DRW_framebuffer_clear(true, false, false, clear_col, 0.0f); + DRW_draw_pass(psl->dof_scatter); + + /* Resolve */ + DRW_framebuffer_bind(effects->target_buffer); + DRW_draw_pass(psl->dof_resolve); + SWAP_BUFFERS(); + } +} + +void EEVEE_depth_of_field_free(void) +{ + DRW_SHADER_FREE_SAFE(e_data.dof_downsample_sh); + DRW_SHADER_FREE_SAFE(e_data.dof_scatter_sh); + DRW_SHADER_FREE_SAFE(e_data.dof_resolve_sh); +} |