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Diffstat (limited to 'source/blender/draw/modes/overlay_mode.c')
| -rw-r--r-- | source/blender/draw/modes/overlay_mode.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/source/blender/draw/modes/overlay_mode.c b/source/blender/draw/modes/overlay_mode.c new file mode 100644 index 00000000000..97403b14ac5 --- /dev/null +++ b/source/blender/draw/modes/overlay_mode.c @@ -0,0 +1,249 @@ +/* + * 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 overlay_mode.c + * \ingroup draw_engine + */ + +#include "DNA_view3d_types.h" + +#include "BKE_object.h" + +#include "GPU_shader.h" +#include "GPU_extensions.h" +#include "DRW_render.h" + +#include "draw_mode_engines.h" + +/* Structures */ +typedef struct OVERLAY_StorageList { + struct OVERLAY_PrivateData *g_data; +} OVERLAY_StorageList; + +typedef struct OVERLAY_PassList { + struct DRWPass *face_orientation_pass; + struct DRWPass *face_wireframe_pass; +} OVERLAY_PassList; + +typedef struct OVERLAY_Data { + void *engine_type; + DRWViewportEmptyList *fbl; + DRWViewportEmptyList *txl; + OVERLAY_PassList *psl; + OVERLAY_StorageList *stl; +} OVERLAY_Data; + +typedef struct OVERLAY_PrivateData { + GPUShader *wire_sh; /* reference */ + DRWShadingGroup *face_orientation_shgrp; + View3DOverlay overlay; + float wire_step_param[2]; +} OVERLAY_PrivateData; /* Transient data */ + +/* *********** STATIC *********** */ +static struct { + /* Face orientation shader */ + struct GPUShader *face_orientation_sh; + /* Wireframe shader */ + struct GPUShader *face_wireframe_sh; + struct GPUShader *face_wireframe_pretty_sh; +} e_data = {NULL}; + +/* Shaders */ +extern char datatoc_overlay_face_orientation_frag_glsl[]; +extern char datatoc_overlay_face_orientation_vert_glsl[]; + +extern char datatoc_overlay_face_wireframe_vert_glsl[]; +extern char datatoc_overlay_face_wireframe_geom_glsl[]; +extern char datatoc_overlay_face_wireframe_frag_glsl[]; + +extern struct GlobalsUboStorage ts; /* draw_common.c */ + +/* Functions */ +static void overlay_engine_init(void *vedata) +{ + OVERLAY_Data * data = (OVERLAY_Data *)vedata; + OVERLAY_StorageList *stl = data->stl; + + if (!stl->g_data) { + /* Alloc transient pointers */ + stl->g_data = MEM_mallocN(sizeof(*stl->g_data), __func__); + } + + if (!e_data.face_orientation_sh) { + /* Face orientation */ + e_data.face_orientation_sh = DRW_shader_create( + datatoc_overlay_face_orientation_vert_glsl, NULL, + datatoc_overlay_face_orientation_frag_glsl, NULL); + } + + if (!e_data.face_wireframe_sh) { + bool use_geom = GPU_type_matches(GPU_DEVICE_INTEL, GPU_OS_ANY, GPU_DRIVER_ANY); + + e_data.face_wireframe_sh = DRW_shader_create( + datatoc_overlay_face_wireframe_vert_glsl, + use_geom ? datatoc_overlay_face_wireframe_geom_glsl : NULL, + datatoc_overlay_face_wireframe_frag_glsl, + use_geom ? "#define USE_GEOM_SHADER\n" + : NULL); + + e_data.face_wireframe_pretty_sh = DRW_shader_create( + datatoc_overlay_face_wireframe_vert_glsl, + use_geom ? datatoc_overlay_face_wireframe_geom_glsl : NULL, + datatoc_overlay_face_wireframe_frag_glsl, + use_geom ? "#define USE_GEOM_SHADER\n" + "#define LIGHT_EDGES\n" + : "#define LIGHT_EDGES\n"); + } +} + +static void overlay_cache_init(void *vedata) +{ + OVERLAY_Data * data = (OVERLAY_Data *)vedata; + OVERLAY_PassList *psl = data->psl; + OVERLAY_StorageList *stl = data->stl; + + const DRWContextState *DCS = DRW_context_state_get(); + + View3D *v3d = DCS->v3d; + if (v3d) { + stl->g_data->overlay = v3d->overlay; + } + else { + memset(&stl->g_data->overlay, 0, sizeof(stl->g_data->overlay)); + } + + /* Face Orientation Pass */ + if (stl->g_data->overlay.flag & V3D_OVERLAY_FACE_ORIENTATION) { + DRWState state = DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_EQUAL | DRW_STATE_BLEND; + psl->face_orientation_pass = DRW_pass_create("Face Orientation", state); + stl->g_data->face_orientation_shgrp = DRW_shgroup_create( + e_data.face_orientation_sh, psl->face_orientation_pass); + } + if (stl->g_data->overlay.flag & V3D_OVERLAY_WIREFRAMES) { + DRWState state = DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_LESS_EQUAL | DRW_STATE_BLEND; + psl->face_wireframe_pass = DRW_pass_create("Face Wires", state); + /* Sticky uniforms (don't need to respecify each time since shader does not change). */ + stl->g_data->wire_sh = (stl->g_data->overlay.wireframe_threshold == 1.0f) ? e_data.face_wireframe_sh + : e_data.face_wireframe_pretty_sh; + DRWShadingGroup *shgrp = DRW_shgroup_create(stl->g_data->wire_sh, psl->face_wireframe_pass); + DRW_shgroup_uniform_vec2(shgrp, "viewportSize", DRW_viewport_size_get(), 1); + DRW_shgroup_uniform_vec2(shgrp, "wireStepParam", stl->g_data->wire_step_param, 1); + + /** + * The wireframe threshold ranges from 0.0 to 1.0 + * When 1.0 we show all the edges, when 0.5 we show as many as 2.7. + * + * If we wanted 0.0 to match 2.7, factor would need to be 0.003f. + * The range controls the falloff effect. If range was 0.0f we would get a hard cut (as in 2.7). + * That said we are using a different algorithm so the results will always differ. + */ + const float factor = 0.0045f; + const float range = 0.00125f; + stl->g_data->wire_step_param[1] = (1.0f - factor) + stl->g_data->overlay.wireframe_threshold * factor; + stl->g_data->wire_step_param[0] = stl->g_data->wire_step_param[1] + range; + } +} + +static void overlay_cache_populate(void *vedata, Object *ob) +{ + OVERLAY_Data * data = (OVERLAY_Data *)vedata; + OVERLAY_StorageList *stl = data->stl; + OVERLAY_PrivateData *pd = stl->g_data; + OVERLAY_PassList *psl = data->psl; + const DRWContextState *draw_ctx = DRW_context_state_get(); + + if (!DRW_object_is_renderable(ob)) + return; + + if (stl->g_data->overlay.flag & V3D_OVERLAY_FACE_ORIENTATION) { + struct Gwn_Batch *geom = DRW_cache_object_surface_get(ob); + if (geom) { + DRW_shgroup_call_add(pd->face_orientation_shgrp, geom, ob->obmat); + } + } + + if (stl->g_data->overlay.flag & V3D_OVERLAY_WIREFRAMES) { + /* Don't do that in edit mode. */ + if ((ob != draw_ctx->object_edit) && !BKE_object_is_in_editmode(ob)) { + int tri_count; + GPUTexture *verts = NULL, *faceids; + DRW_cache_object_face_wireframe_get(ob, &verts, &faceids, &tri_count); + if (verts) { + float *rim_col = ts.colorWire; + if ((ob->base_flag & BASE_SELECTED) != 0) { + rim_col = (ob == draw_ctx->obact) ? ts.colorActive : ts.colorSelect; + } + DRWShadingGroup *shgrp = DRW_shgroup_create(stl->g_data->wire_sh, psl->face_wireframe_pass); + DRW_shgroup_uniform_texture(shgrp, "vertData", verts); + DRW_shgroup_uniform_texture(shgrp, "faceIds", faceids); + DRW_shgroup_uniform_vec3(shgrp, "wireColor", ts.colorWire, 1); + DRW_shgroup_uniform_vec3(shgrp, "rimColor", rim_col, 1); + DRW_shgroup_call_object_procedural_triangles_culled_add(shgrp, tri_count, ob); + } + } + } +} + +static void overlay_cache_finish(void *UNUSED(vedata)) +{ +} + +static void overlay_draw_scene(void *vedata) +{ + OVERLAY_Data * data = (OVERLAY_Data *)vedata; + OVERLAY_PassList *psl = data->psl; + OVERLAY_StorageList *stl = data->stl; + OVERLAY_PrivateData *pd = stl->g_data; + + if (pd->overlay.flag & V3D_OVERLAY_FACE_ORIENTATION) { + DRW_draw_pass(psl->face_orientation_pass); + } + if (pd->overlay.flag & V3D_OVERLAY_WIREFRAMES) { + DRW_draw_pass(psl->face_wireframe_pass); + } +} + +static void overlay_engine_free(void) +{ + DRW_SHADER_FREE_SAFE(e_data.face_orientation_sh); + DRW_SHADER_FREE_SAFE(e_data.face_wireframe_sh); + DRW_SHADER_FREE_SAFE(e_data.face_wireframe_pretty_sh); +} + +static const DrawEngineDataSize overlay_data_size = DRW_VIEWPORT_DATA_SIZE(OVERLAY_Data); + +DrawEngineType draw_engine_overlay_type = { + NULL, NULL, + N_("OverlayEngine"), + &overlay_data_size, + &overlay_engine_init, + &overlay_engine_free, + &overlay_cache_init, + &overlay_cache_populate, + &overlay_cache_finish, + NULL, + &overlay_draw_scene, + NULL, + NULL, + NULL, +}; + |