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/*
* 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 blender/draw/modes/paint_weight_mode.c
* \ingroup draw
*/
#include "DRW_engine.h"
#include "DRW_render.h"
/* If builtin shaders are needed */
#include "GPU_shader.h"
#include "draw_common.h"
#include "draw_mode_engines.h"
#include "DNA_mesh_types.h"
#include "BKE_mesh.h"
extern struct GPUUniformBuffer *globals_ubo; /* draw_common.c */
extern struct GlobalsUboStorage ts; /* draw_common.c */
extern char datatoc_paint_wire_vert_glsl[];
extern char datatoc_paint_wire_frag_glsl[];
extern char datatoc_paint_vert_frag_glsl[];
extern char datatoc_common_globals_lib_glsl[];
/* *********** LISTS *********** */
typedef struct PAINT_WEIGHT_PassList {
struct DRWPass *weight_faces;
struct DRWPass *wire_overlay;
struct DRWPass *face_overlay;
struct DRWPass *vert_overlay;
} PAINT_WEIGHT_PassList;
typedef struct PAINT_WEIGHT_StorageList {
struct PAINT_WEIGHT_PrivateData *g_data;
} PAINT_WEIGHT_StorageList;
typedef struct PAINT_WEIGHT_Data {
void *engine_type;
DRWViewportEmptyList *fbl;
DRWViewportEmptyList *txl;
PAINT_WEIGHT_PassList *psl;
PAINT_WEIGHT_StorageList *stl;
} PAINT_WEIGHT_Data;
/* *********** STATIC *********** */
static struct {
struct GPUShader *weight_face_shader;
struct GPUShader *wire_overlay_shader;
struct GPUShader *face_overlay_shader;
struct GPUShader *vert_overlay_shader;
int actdef;
} e_data = {NULL}; /* Engine data */
typedef struct PAINT_WEIGHT_PrivateData {
DRWShadingGroup *fweights_shgrp;
DRWShadingGroup *lwire_shgrp;
DRWShadingGroup *face_shgrp;
DRWShadingGroup *vert_shgrp;
} PAINT_WEIGHT_PrivateData;
/* *********** FUNCTIONS *********** */
static void PAINT_WEIGHT_engine_init(void *UNUSED(vedata))
{
const DRWContextState *draw_ctx = DRW_context_state_get();
if (e_data.actdef != draw_ctx->obact->actdef) {
e_data.actdef = draw_ctx->obact->actdef;
BKE_mesh_batch_cache_dirty(draw_ctx->obact->data, BKE_MESH_BATCH_DIRTY_ALL);
}
if (!e_data.weight_face_shader) {
e_data.weight_face_shader = GPU_shader_get_builtin_shader(GPU_SHADER_SIMPLE_LIGHTING_SMOOTH_COLOR_ALPHA);
}
if (!e_data.wire_overlay_shader) {
e_data.wire_overlay_shader = DRW_shader_create_with_lib(
datatoc_paint_wire_vert_glsl, NULL,
datatoc_paint_wire_frag_glsl,
datatoc_common_globals_lib_glsl, "#define WEIGHT_MODE\n");
}
if (!e_data.face_overlay_shader) {
e_data.face_overlay_shader = GPU_shader_get_builtin_shader(GPU_SHADER_3D_UNIFORM_COLOR);
}
if (!e_data.vert_overlay_shader) {
e_data.vert_overlay_shader = DRW_shader_create_with_lib(
datatoc_paint_wire_vert_glsl, NULL,
datatoc_paint_vert_frag_glsl,
datatoc_common_globals_lib_glsl, NULL);
}
}
static void PAINT_WEIGHT_cache_init(void *vedata)
{
PAINT_WEIGHT_PassList *psl = ((PAINT_WEIGHT_Data *)vedata)->psl;
PAINT_WEIGHT_StorageList *stl = ((PAINT_WEIGHT_Data *)vedata)->stl;
if (!stl->g_data) {
/* Alloc transient pointers */
stl->g_data = MEM_mallocN(sizeof(*stl->g_data), __func__);
}
{
/* Create a pass */
psl->weight_faces = DRW_pass_create(
"Weight Pass",
DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS | DRW_STATE_MULTIPLY);
stl->g_data->fweights_shgrp = DRW_shgroup_create(e_data.weight_face_shader, psl->weight_faces);
static float light[3] = {-0.3f, 0.5f, 1.0f};
static float alpha = 1.0f;
static float world_light = 1.0f;
DRW_shgroup_uniform_vec3(stl->g_data->fweights_shgrp, "light", light, 1);
DRW_shgroup_uniform_float(stl->g_data->fweights_shgrp, "alpha", &alpha, 1);
DRW_shgroup_uniform_float(stl->g_data->fweights_shgrp, "global", &world_light, 1);
}
{
psl->wire_overlay = DRW_pass_create(
"Wire Pass",
DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS);
stl->g_data->lwire_shgrp = DRW_shgroup_create(e_data.wire_overlay_shader, psl->wire_overlay);
}
{
psl->face_overlay = DRW_pass_create(
"Face Mask Pass",
DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS | DRW_STATE_BLEND);
stl->g_data->face_shgrp = DRW_shgroup_create(e_data.face_overlay_shader, psl->face_overlay);
static float col[4] = {1.0f, 1.0f, 1.0f, 0.2f};
DRW_shgroup_uniform_vec4(stl->g_data->face_shgrp, "color", col, 1);
}
{
psl->vert_overlay = DRW_pass_create(
"Vert Mask Pass",
DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS);
stl->g_data->vert_shgrp = DRW_shgroup_create(e_data.vert_overlay_shader, psl->vert_overlay);
}
}
static void PAINT_WEIGHT_cache_populate(void *vedata, Object *ob)
{
PAINT_WEIGHT_StorageList *stl = ((PAINT_WEIGHT_Data *)vedata)->stl;
const DRWContextState *draw_ctx = DRW_context_state_get();
if ((ob->type == OB_MESH) && (ob == draw_ctx->obact)) {
IDProperty *ces_mode_pw = BKE_layer_collection_engine_evaluated_get(ob, COLLECTION_MODE_PAINT_WEIGHT, "");
const Mesh *me = ob->data;
const bool use_wire = BKE_collection_engine_property_value_get_bool(ces_mode_pw, "use_wire");
const bool use_surface = DRW_object_is_mode_shade(ob) == true;
const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0;
const bool use_vert_sel = (me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0;
struct Gwn_Batch *geom;
if (use_surface) {
geom = DRW_cache_mesh_surface_weights_get(ob);
DRW_shgroup_call_add(stl->g_data->fweights_shgrp, geom, ob->obmat);
}
if (use_face_sel || use_wire) {
geom = DRW_cache_mesh_edges_paint_overlay_get(ob, use_wire, use_face_sel);
DRW_shgroup_call_add(stl->g_data->lwire_shgrp, geom, ob->obmat);
}
if (use_face_sel) {
geom = DRW_cache_mesh_faces_weight_overlay_get(ob);
DRW_shgroup_call_add(stl->g_data->face_shgrp, geom, ob->obmat);
}
if (use_vert_sel) {
geom = DRW_cache_mesh_verts_weight_overlay_get(ob);
DRW_shgroup_call_add(stl->g_data->vert_shgrp, geom, ob->obmat);
}
}
}
static void PAINT_WEIGHT_draw_scene(void *vedata)
{
PAINT_WEIGHT_PassList *psl = ((PAINT_WEIGHT_Data *)vedata)->psl;
DRW_draw_pass(psl->weight_faces);
DRW_draw_pass(psl->face_overlay);
DRW_draw_pass(psl->wire_overlay);
DRW_draw_pass(psl->vert_overlay);
}
static void PAINT_WEIGHT_engine_free(void)
{
DRW_SHADER_FREE_SAFE(e_data.wire_overlay_shader);
DRW_SHADER_FREE_SAFE(e_data.vert_overlay_shader);
}
void PAINT_WEIGHT_collection_settings_create(IDProperty *properties)
{
BLI_assert(properties &&
properties->type == IDP_GROUP &&
properties->subtype == IDP_GROUP_SUB_MODE_PAINT_WEIGHT);
BKE_collection_engine_property_add_bool(properties, "use_wire", false);
}
static const DrawEngineDataSize PAINT_WEIGHT_data_size = DRW_VIEWPORT_DATA_SIZE(PAINT_WEIGHT_Data);
DrawEngineType draw_engine_paint_weight_type = {
NULL, NULL,
N_("PaintWeightMode"),
&PAINT_WEIGHT_data_size,
&PAINT_WEIGHT_engine_init,
&PAINT_WEIGHT_engine_free,
&PAINT_WEIGHT_cache_init,
&PAINT_WEIGHT_cache_populate,
NULL,
NULL,
&PAINT_WEIGHT_draw_scene,
NULL,
NULL,
};
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