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|
/*
* 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.
*
* The Original Code is Copyright (C) 2008, Blender Foundation
* This is a new part of Blender
*/
/** \file
* \ingroup draw
*/
#include "BLI_polyfill_2d.h"
#include "BLI_math_color.h"
#include "DNA_meshdata_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_screen_types.h"
#include "DNA_view3d_types.h"
#include "BKE_deform.h"
#include "BKE_gpencil.h"
#include "DRW_render.h"
#include "ED_gpencil.h"
#include "ED_view3d.h"
#include "UI_resources.h"
#include "gpencil_engine.h"
/* Helper to add stroke point to vbo */
static void gpencil_set_stroke_point(GPUVertBuf *vbo,
const bGPDspoint *pt,
int idx,
uint pos_id,
uint color_id,
uint thickness_id,
uint uvdata_id,
short thickness,
const float ink[4])
{
float alpha = ink[3] * pt->strength;
CLAMP(alpha, GPENCIL_STRENGTH_MIN, 1.0f);
float col[4];
ARRAY_SET_ITEMS(col, ink[0], ink[1], ink[2], alpha);
GPU_vertbuf_attr_set(vbo, color_id, idx, col);
/* transfer both values using the same shader variable */
float uvdata[2] = {pt->uv_fac, pt->uv_rot};
GPU_vertbuf_attr_set(vbo, uvdata_id, idx, uvdata);
/* the thickness of the stroke must be affected by zoom, so a pixel scale is calculated */
float thick = max_ff(pt->pressure * thickness, 1.0f);
GPU_vertbuf_attr_set(vbo, thickness_id, idx, &thick);
GPU_vertbuf_attr_set(vbo, pos_id, idx, &pt->x);
}
/* Helper to add a new fill point and texture coordinates to vertex buffer */
static void gpencil_set_fill_point(GPUVertBuf *vbo,
int idx,
bGPDspoint *pt,
const float fcolor[4],
float uv[2],
uint pos_id,
uint color_id,
uint text_id)
{
GPU_vertbuf_attr_set(vbo, pos_id, idx, &pt->x);
GPU_vertbuf_attr_set(vbo, color_id, idx, fcolor);
GPU_vertbuf_attr_set(vbo, text_id, idx, uv);
}
static void gpencil_vbo_ensure_size(GpencilBatchCacheElem *be, int totvertex)
{
if (be->vbo->vertex_alloc <= be->vbo_len + totvertex) {
uint newsize = be->vbo->vertex_alloc +
(((totvertex / GPENCIL_VBO_BLOCK_SIZE) + 1) * GPENCIL_VBO_BLOCK_SIZE);
GPU_vertbuf_data_resize(be->vbo, newsize);
}
}
/* create batch geometry data for points stroke shader */
void DRW_gpencil_get_point_geom(GpencilBatchCacheElem *be,
bGPDstroke *gps,
short thickness,
const float ink[4])
{
int totvertex = gps->totpoints;
if (be->vbo == NULL) {
be->pos_id = GPU_vertformat_attr_add(&be->format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
be->color_id = GPU_vertformat_attr_add(&be->format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
be->thickness_id = GPU_vertformat_attr_add(
&be->format, "thickness", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
be->uvdata_id = GPU_vertformat_attr_add(
&be->format, "uvdata", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
be->prev_pos_id = GPU_vertformat_attr_add(
&be->format, "prev_pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
be->vbo = GPU_vertbuf_create_with_format(&be->format);
GPU_vertbuf_data_alloc(be->vbo, be->tot_vertex);
be->vbo_len = 0;
}
gpencil_vbo_ensure_size(be, totvertex);
/* draw stroke curve */
const bGPDspoint *pt = gps->points;
float alpha;
float col[4];
for (int i = 0; i < gps->totpoints; i++, pt++) {
/* set point */
alpha = ink[3] * pt->strength;
CLAMP(alpha, GPENCIL_STRENGTH_MIN, 1.0f);
ARRAY_SET_ITEMS(col, ink[0], ink[1], ink[2], alpha);
float thick = max_ff(pt->pressure * thickness, 1.0f);
GPU_vertbuf_attr_set(be->vbo, be->color_id, be->vbo_len, col);
GPU_vertbuf_attr_set(be->vbo, be->thickness_id, be->vbo_len, &thick);
/* transfer both values using the same shader variable */
float uvdata[2] = {pt->uv_fac, pt->uv_rot};
GPU_vertbuf_attr_set(be->vbo, be->uvdata_id, be->vbo_len, uvdata);
GPU_vertbuf_attr_set(be->vbo, be->pos_id, be->vbo_len, &pt->x);
/* use previous point to determine stroke direction */
bGPDspoint *pt2 = NULL;
if (i == 0) {
if (gps->totpoints > 1) {
/* extrapolate a point before first point */
float fpt[3];
pt2 = &gps->points[1];
interp_v3_v3v3(fpt, &pt2->x, &pt->x, 1.5f);
GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, fpt);
}
else {
GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, &pt->x);
}
}
else {
pt2 = &gps->points[i - 1];
GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, &pt2->x);
}
be->vbo_len++;
}
}
/* create batch geometry data for stroke shader */
void DRW_gpencil_get_stroke_geom(struct GpencilBatchCacheElem *be,
bGPDstroke *gps,
short thickness,
const float ink[4])
{
bGPDspoint *points = gps->points;
int totpoints = gps->totpoints;
/* if cyclic needs more vertex */
int cyclic_add = (gps->flag & GP_STROKE_CYCLIC) ? 1 : 0;
int totvertex = totpoints + cyclic_add + 2;
if (be->vbo == NULL) {
be->pos_id = GPU_vertformat_attr_add(&be->format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
be->color_id = GPU_vertformat_attr_add(&be->format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
be->thickness_id = GPU_vertformat_attr_add(
&be->format, "thickness", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
be->uvdata_id = GPU_vertformat_attr_add(
&be->format, "uvdata", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
be->vbo = GPU_vertbuf_create_with_format(&be->format);
GPU_vertbuf_data_alloc(be->vbo, be->tot_vertex);
be->vbo_len = 0;
}
gpencil_vbo_ensure_size(be, totvertex);
/* draw stroke curve */
const bGPDspoint *pt = points;
for (int i = 0; i < totpoints; i++, pt++) {
/* first point for adjacency (not drawn) */
if (i == 0) {
if (gps->flag & GP_STROKE_CYCLIC && totpoints > 2) {
gpencil_set_stroke_point(be->vbo,
&points[totpoints - 1],
be->vbo_len,
be->pos_id,
be->color_id,
be->thickness_id,
be->uvdata_id,
thickness,
ink);
be->vbo_len++;
}
else {
gpencil_set_stroke_point(be->vbo,
&points[1],
be->vbo_len,
be->pos_id,
be->color_id,
be->thickness_id,
be->uvdata_id,
thickness,
ink);
be->vbo_len++;
}
}
/* set point */
gpencil_set_stroke_point(be->vbo,
pt,
be->vbo_len,
be->pos_id,
be->color_id,
be->thickness_id,
be->uvdata_id,
thickness,
ink);
be->vbo_len++;
}
if (gps->flag & GP_STROKE_CYCLIC && totpoints > 2) {
/* draw line to first point to complete the cycle */
gpencil_set_stroke_point(be->vbo,
&points[0],
be->vbo_len,
be->pos_id,
be->color_id,
be->thickness_id,
be->uvdata_id,
thickness,
ink);
be->vbo_len++;
/* now add adjacency point (not drawn) */
gpencil_set_stroke_point(be->vbo,
&points[1],
be->vbo_len,
be->pos_id,
be->color_id,
be->thickness_id,
be->uvdata_id,
thickness,
ink);
be->vbo_len++;
}
/* last adjacency point (not drawn) */
else {
gpencil_set_stroke_point(be->vbo,
&points[totpoints - 2],
be->vbo_len,
be->pos_id,
be->color_id,
be->thickness_id,
be->uvdata_id,
thickness,
ink);
be->vbo_len++;
}
}
/* create batch geometry data for stroke shader */
void DRW_gpencil_get_fill_geom(struct GpencilBatchCacheElem *be,
Object *ob,
bGPDstroke *gps,
const float color[4])
{
BLI_assert(gps->totpoints >= 3);
/* Calculate triangles cache for filling area (must be done only after changes) */
if ((gps->flag & GP_STROKE_RECALC_GEOMETRY) || (gps->tot_triangles == 0) ||
(gps->triangles == NULL)) {
DRW_gpencil_triangulate_stroke_fill(ob, gps);
}
BLI_assert(gps->tot_triangles >= 1);
int totvertex = gps->tot_triangles * 3;
if (be->vbo == NULL) {
be->pos_id = GPU_vertformat_attr_add(&be->format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
be->color_id = GPU_vertformat_attr_add(&be->format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
be->uvdata_id = GPU_vertformat_attr_add(
&be->format, "texCoord", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
be->vbo = GPU_vertbuf_create_with_format(&be->format);
GPU_vertbuf_data_alloc(be->vbo, be->tot_vertex);
be->vbo_len = 0;
}
gpencil_vbo_ensure_size(be, totvertex);
/* Draw all triangles for filling the polygon (cache must be calculated before) */
bGPDtriangle *stroke_triangle = gps->triangles;
for (int i = 0; i < gps->tot_triangles; i++, stroke_triangle++) {
for (int j = 0; j < 3; j++) {
gpencil_set_fill_point(be->vbo,
be->vbo_len,
&gps->points[stroke_triangle->verts[j]],
color,
stroke_triangle->uv[j],
be->pos_id,
be->color_id,
be->uvdata_id);
be->vbo_len++;
}
}
}
/* create batch geometry data for current buffer stroke shader */
GPUBatch *DRW_gpencil_get_buffer_stroke_geom(bGPdata *gpd, short thickness)
{
const DRWContextState *draw_ctx = DRW_context_state_get();
Scene *scene = draw_ctx->scene;
ARegion *ar = draw_ctx->ar;
RegionView3D *rv3d = draw_ctx->rv3d;
ToolSettings *ts = scene->toolsettings;
Object *ob = draw_ctx->obact;
tGPspoint *points = gpd->runtime.sbuffer;
int totpoints = gpd->runtime.sbuffer_size;
/* if cyclic needs more vertex */
int cyclic_add = (gpd->runtime.sbuffer_sflag & GP_STROKE_CYCLIC) ? 1 : 0;
int totvertex = totpoints + cyclic_add + 2;
static GPUVertFormat format = {0};
static uint pos_id, color_id, thickness_id, uvdata_id;
if (format.attr_len == 0) {
pos_id = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
color_id = GPU_vertformat_attr_add(&format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
thickness_id = GPU_vertformat_attr_add(&format, "thickness", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
uvdata_id = GPU_vertformat_attr_add(&format, "uvdata", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
}
GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
GPU_vertbuf_data_alloc(vbo, totvertex);
/* draw stroke curve */
const tGPspoint *tpt = points;
bGPDspoint pt, pt2, pt3;
int idx = 0;
/* get origin to reproject point */
float origin[3];
bGPDlayer *gpl = BKE_gpencil_layer_getactive(gpd);
ED_gp_get_drawing_reference(scene, ob, gpl, ts->gpencil_v3d_align, origin);
for (int i = 0; i < totpoints; i++, tpt++) {
ED_gpencil_tpoint_to_point(ar, origin, tpt, &pt);
ED_gp_project_point_to_plane(scene, ob, rv3d, origin, ts->gp_sculpt.lock_axis - 1, &pt);
/* first point for adjacency (not drawn) */
if (i == 0) {
if (gpd->runtime.sbuffer_sflag & GP_STROKE_CYCLIC && totpoints > 2) {
ED_gpencil_tpoint_to_point(ar, origin, &points[totpoints - 1], &pt2);
gpencil_set_stroke_point(vbo,
&pt2,
idx,
pos_id,
color_id,
thickness_id,
uvdata_id,
thickness,
gpd->runtime.scolor);
idx++;
}
else {
ED_gpencil_tpoint_to_point(ar, origin, &points[1], &pt2);
gpencil_set_stroke_point(vbo,
&pt2,
idx,
pos_id,
color_id,
thickness_id,
uvdata_id,
thickness,
gpd->runtime.scolor);
idx++;
}
}
/* set point */
gpencil_set_stroke_point(
vbo, &pt, idx, pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor);
idx++;
}
/* last adjacency point (not drawn) */
if (gpd->runtime.sbuffer_sflag & GP_STROKE_CYCLIC && totpoints > 2) {
/* draw line to first point to complete the cycle */
ED_gpencil_tpoint_to_point(ar, origin, &points[0], &pt2);
gpencil_set_stroke_point(
vbo, &pt2, idx, pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor);
idx++;
/* now add adjacency point (not drawn) */
ED_gpencil_tpoint_to_point(ar, origin, &points[1], &pt3);
gpencil_set_stroke_point(
vbo, &pt3, idx, pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor);
idx++;
}
/* last adjacency point (not drawn) */
else {
ED_gpencil_tpoint_to_point(ar, origin, &points[totpoints - 2], &pt2);
gpencil_set_stroke_point(
vbo, &pt2, idx, pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor);
idx++;
}
return GPU_batch_create_ex(GPU_PRIM_LINE_STRIP_ADJ, vbo, NULL, GPU_BATCH_OWNS_VBO);
}
/* create batch geometry data for current buffer point shader */
GPUBatch *DRW_gpencil_get_buffer_point_geom(bGPdata *gpd, short thickness)
{
const DRWContextState *draw_ctx = DRW_context_state_get();
Scene *scene = draw_ctx->scene;
ARegion *ar = draw_ctx->ar;
RegionView3D *rv3d = draw_ctx->rv3d;
ToolSettings *ts = scene->toolsettings;
Object *ob = draw_ctx->obact;
tGPspoint *points = gpd->runtime.sbuffer;
int totpoints = gpd->runtime.sbuffer_size;
static GPUVertFormat format = {0};
static uint pos_id, color_id, thickness_id, uvdata_id;
if (format.attr_len == 0) {
pos_id = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
color_id = GPU_vertformat_attr_add(&format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
thickness_id = GPU_vertformat_attr_add(&format, "thickness", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
uvdata_id = GPU_vertformat_attr_add(&format, "uvdata", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
}
GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
GPU_vertbuf_data_alloc(vbo, totpoints);
/* draw stroke curve */
const tGPspoint *tpt = points;
bGPDspoint pt;
int idx = 0;
/* get origin to reproject point */
float origin[3];
bGPDlayer *gpl = BKE_gpencil_layer_getactive(gpd);
ED_gp_get_drawing_reference(scene, ob, gpl, ts->gpencil_v3d_align, origin);
for (int i = 0; i < totpoints; i++, tpt++) {
ED_gpencil_tpoint_to_point(ar, origin, tpt, &pt);
ED_gp_project_point_to_plane(scene, ob, rv3d, origin, ts->gp_sculpt.lock_axis - 1, &pt);
/* set point */
gpencil_set_stroke_point(
vbo, &pt, idx, pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor);
idx++;
}
return GPU_batch_create_ex(GPU_PRIM_POINTS, vbo, NULL, GPU_BATCH_OWNS_VBO);
}
/* create batch geometry data for current buffer control point shader */
GPUBatch *DRW_gpencil_get_buffer_ctrlpoint_geom(bGPdata *gpd)
{
bGPDcontrolpoint *cps = gpd->runtime.cp_points;
int totpoints = gpd->runtime.tot_cp_points;
const DRWContextState *draw_ctx = DRW_context_state_get();
Scene *scene = draw_ctx->scene;
ToolSettings *ts = scene->toolsettings;
if (ts->gp_sculpt.guide.use_guide) {
totpoints++;
}
static GPUVertFormat format = {0};
static uint pos_id, color_id, size_id;
if (format.attr_len == 0) {
pos_id = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
size_id = GPU_vertformat_attr_add(&format, "size", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
color_id = GPU_vertformat_attr_add(&format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
}
GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
GPU_vertbuf_data_alloc(vbo, totpoints);
int idx = 0;
for (int i = 0; i < gpd->runtime.tot_cp_points; i++) {
bGPDcontrolpoint *cp = &cps[i];
GPU_vertbuf_attr_set(vbo, color_id, idx, cp->color);
/* scale size */
float size = cp->size * 0.8f;
GPU_vertbuf_attr_set(vbo, size_id, idx, &size);
GPU_vertbuf_attr_set(vbo, pos_id, idx, &cp->x);
idx++;
}
if (ts->gp_sculpt.guide.use_guide) {
float size = 10 * 0.8f;
float color[4];
float position[3];
if (ts->gp_sculpt.guide.reference_point == GP_GUIDE_REF_CUSTOM) {
UI_GetThemeColor4fv(TH_GIZMO_PRIMARY, color);
copy_v3_v3(position, ts->gp_sculpt.guide.location);
}
else if (ts->gp_sculpt.guide.reference_point == GP_GUIDE_REF_OBJECT &&
ts->gp_sculpt.guide.reference_object != NULL) {
UI_GetThemeColor4fv(TH_GIZMO_SECONDARY, color);
copy_v3_v3(position, ts->gp_sculpt.guide.reference_object->loc);
}
else {
UI_GetThemeColor4fv(TH_REDALERT, color);
copy_v3_v3(position, scene->cursor.location);
}
GPU_vertbuf_attr_set(vbo, pos_id, idx, position);
GPU_vertbuf_attr_set(vbo, size_id, idx, &size);
GPU_vertbuf_attr_set(vbo, color_id, idx, color);
}
return GPU_batch_create_ex(GPU_PRIM_POINTS, vbo, NULL, GPU_BATCH_OWNS_VBO);
}
/* create batch geometry data for current buffer fill shader */
GPUBatch *DRW_gpencil_get_buffer_fill_geom(bGPdata *gpd)
{
if (gpd == NULL) {
return NULL;
}
const tGPspoint *points = gpd->runtime.sbuffer;
int totpoints = gpd->runtime.sbuffer_size;
if (totpoints < 3) {
return NULL;
}
const DRWContextState *draw_ctx = DRW_context_state_get();
Scene *scene = draw_ctx->scene;
ARegion *ar = draw_ctx->ar;
ToolSettings *ts = scene->toolsettings;
Object *ob = draw_ctx->obact;
/* get origin to reproject point */
float origin[3];
bGPDlayer *gpl = BKE_gpencil_layer_getactive(gpd);
ED_gp_get_drawing_reference(scene, ob, gpl, ts->gpencil_v3d_align, origin);
int tot_triangles = totpoints - 2;
/* allocate memory for temporary areas */
uint(*tmp_triangles)[3] = MEM_mallocN(sizeof(*tmp_triangles) * tot_triangles, __func__);
float(*points2d)[2] = MEM_mallocN(sizeof(*points2d) * totpoints, __func__);
/* Convert points to array and triangulate
* Here a cache is not used because while drawing the information changes all the time, so the cache
* would be recalculated constantly, so it is better to do direct calculation for each function call
*/
for (int i = 0; i < totpoints; i++) {
const tGPspoint *pt = &points[i];
points2d[i][0] = pt->x;
points2d[i][1] = pt->y;
}
BLI_polyfill_calc(points2d, (uint)totpoints, 0, tmp_triangles);
static GPUVertFormat format = {0};
static uint pos_id, color_id;
if (format.attr_len == 0) {
pos_id = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
color_id = GPU_vertformat_attr_add(&format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
}
GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
/* draw triangulation data */
if (tot_triangles > 0) {
GPU_vertbuf_data_alloc(vbo, tot_triangles * 3);
const tGPspoint *tpt;
bGPDspoint pt;
int idx = 0;
for (int i = 0; i < tot_triangles; i++) {
for (int j = 0; j < 3; j++) {
tpt = &points[tmp_triangles[i][j]];
ED_gpencil_tpoint_to_point(ar, origin, tpt, &pt);
GPU_vertbuf_attr_set(vbo, pos_id, idx, &pt.x);
GPU_vertbuf_attr_set(vbo, color_id, idx, gpd->runtime.sfill);
idx++;
}
}
}
/* clear memory */
if (tmp_triangles) {
MEM_freeN(tmp_triangles);
}
if (points2d) {
MEM_freeN(points2d);
}
return GPU_batch_create_ex(GPU_PRIM_TRIS, vbo, NULL, GPU_BATCH_OWNS_VBO);
}
/* Draw selected verts for strokes being edited */
void DRW_gpencil_get_edit_geom(struct GpencilBatchCacheElem *be,
bGPDstroke *gps,
float alpha,
short dflag)
{
const DRWContextState *draw_ctx = DRW_context_state_get();
Object *ob = draw_ctx->obact;
bGPdata *gpd = ob->data;
const bool is_weight_paint = (gpd) && (gpd->flag & GP_DATA_STROKE_WEIGHTMODE);
int vgindex = ob->actdef - 1;
if (!BLI_findlink(&ob->defbase, vgindex)) {
vgindex = -1;
}
/* Get size of verts:
* - The selected state needs to be larger than the unselected state so that
* they stand out more.
* - We use the theme setting for size of the unselected verts
*/
float bsize = UI_GetThemeValuef(TH_GP_VERTEX_SIZE);
float vsize;
if ((int)bsize > 8) {
vsize = 10.0f;
bsize = 8.0f;
}
else {
vsize = bsize + 2;
}
/* for now, we assume that the base color of the points is not too close to the real color */
float selectColor[4];
UI_GetThemeColor3fv(TH_GP_VERTEX_SELECT, selectColor);
selectColor[3] = alpha;
float unselectColor[4];
UI_GetThemeColor3fv(TH_GP_VERTEX, unselectColor);
unselectColor[3] = alpha;
if (be->vbo == NULL) {
be->pos_id = GPU_vertformat_attr_add(&be->format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
be->color_id = GPU_vertformat_attr_add(&be->format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
be->thickness_id = GPU_vertformat_attr_add(
&be->format, "size", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
be->vbo = GPU_vertbuf_create_with_format(&be->format);
GPU_vertbuf_data_alloc(be->vbo, be->tot_vertex);
be->vbo_len = 0;
}
gpencil_vbo_ensure_size(be, gps->totpoints);
/* Draw start and end point differently if enabled stroke direction hint */
bool show_direction_hint = (dflag & GP_DATA_SHOW_DIRECTION) && (gps->totpoints > 1);
/* Draw all the stroke points (selected or not) */
bGPDspoint *pt = gps->points;
MDeformVert *dvert = gps->dvert;
float fcolor[4];
float fsize = 0;
for (int i = 0; i < gps->totpoints; i++, pt++) {
/* weight paint */
if (is_weight_paint) {
float weight = (dvert && dvert->dw && (vgindex > -1)) ? defvert_find_weight(dvert, vgindex) :
0.0f;
float hue = 2.0f * (1.0f - weight) / 3.0f;
hsv_to_rgb(hue, 1.0f, 1.0f, &selectColor[0], &selectColor[1], &selectColor[2]);
selectColor[3] = 1.0f;
copy_v4_v4(fcolor, selectColor);
fsize = vsize;
}
else {
if (show_direction_hint && i == 0) {
/* start point in green bigger */
ARRAY_SET_ITEMS(fcolor, 0.0f, 1.0f, 0.0f, 1.0f);
fsize = vsize + 4;
}
else if (show_direction_hint && (i == gps->totpoints - 1)) {
/* end point in red smaller */
ARRAY_SET_ITEMS(fcolor, 1.0f, 0.0f, 0.0f, 1.0f);
fsize = vsize + 1;
}
else if (pt->flag & GP_SPOINT_SELECT) {
copy_v4_v4(fcolor, selectColor);
fsize = vsize;
}
else {
copy_v4_v4(fcolor, unselectColor);
fsize = bsize;
}
}
GPU_vertbuf_attr_set(be->vbo, be->color_id, be->vbo_len, fcolor);
GPU_vertbuf_attr_set(be->vbo, be->thickness_id, be->vbo_len, &fsize);
GPU_vertbuf_attr_set(be->vbo, be->pos_id, be->vbo_len, &pt->x);
be->vbo_len++;
if (gps->dvert != NULL) {
dvert++;
}
}
}
/* Draw lines for strokes being edited */
void DRW_gpencil_get_edlin_geom(struct GpencilBatchCacheElem *be,
bGPDstroke *gps,
float alpha,
short UNUSED(dflag))
{
const DRWContextState *draw_ctx = DRW_context_state_get();
Object *ob = draw_ctx->obact;
bGPdata *gpd = ob->data;
const bool is_weight_paint = (gpd) && (gpd->flag & GP_DATA_STROKE_WEIGHTMODE);
int vgindex = ob->actdef - 1;
if (!BLI_findlink(&ob->defbase, vgindex)) {
vgindex = -1;
}
float selectColor[4];
UI_GetThemeColor3fv(TH_GP_VERTEX_SELECT, selectColor);
selectColor[3] = alpha;
float linecolor[4];
copy_v4_v4(linecolor, gpd->line_color);
if (be->vbo == NULL) {
be->pos_id = GPU_vertformat_attr_add(&be->format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
be->color_id = GPU_vertformat_attr_add(&be->format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
be->vbo = GPU_vertbuf_create_with_format(&be->format);
GPU_vertbuf_data_alloc(be->vbo, be->tot_vertex);
be->vbo_len = 0;
}
gpencil_vbo_ensure_size(be, gps->totpoints);
/* Draw all the stroke lines (selected or not) */
bGPDspoint *pt = gps->points;
MDeformVert *dvert = gps->dvert;
float fcolor[4];
for (int i = 0; i < gps->totpoints; i++, pt++) {
/* weight paint */
if (is_weight_paint) {
float weight = (dvert && dvert->dw && (vgindex > -1)) ? defvert_find_weight(dvert, vgindex) :
0.0f;
float hue = 2.0f * (1.0f - weight) / 3.0f;
hsv_to_rgb(hue, 1.0f, 1.0f, &selectColor[0], &selectColor[1], &selectColor[2]);
selectColor[3] = 1.0f;
copy_v4_v4(fcolor, selectColor);
}
else {
if (pt->flag & GP_SPOINT_SELECT) {
copy_v4_v4(fcolor, selectColor);
}
else {
copy_v4_v4(fcolor, linecolor);
}
}
GPU_vertbuf_attr_set(be->vbo, be->color_id, be->vbo_len, fcolor);
GPU_vertbuf_attr_set(be->vbo, be->pos_id, be->vbo_len, &pt->x);
be->vbo_len++;
if (gps->dvert != NULL) {
dvert++;
}
}
}
static void set_grid_point(GPUVertBuf *vbo,
int idx,
float col_grid[4],
uint pos_id,
uint color_id,
float v1,
float v2,
const int axis)
{
GPU_vertbuf_attr_set(vbo, color_id, idx, col_grid);
float pos[3];
/* Set the grid in the selected axis */
switch (axis) {
case GP_LOCKAXIS_X: {
ARRAY_SET_ITEMS(pos, 0.0f, v1, v2);
break;
}
case GP_LOCKAXIS_Y: {
ARRAY_SET_ITEMS(pos, v1, 0.0f, v2);
break;
}
case GP_LOCKAXIS_Z:
default: /* view aligned */
{
ARRAY_SET_ITEMS(pos, v1, v2, 0.0f);
break;
}
}
GPU_vertbuf_attr_set(vbo, pos_id, idx, pos);
}
/* Draw grid lines */
GPUBatch *DRW_gpencil_get_grid(Object *ob)
{
const DRWContextState *draw_ctx = DRW_context_state_get();
Scene *scene = draw_ctx->scene;
ToolSettings *ts = scene->toolsettings;
View3D *v3d = draw_ctx->v3d;
bGPdata *gpd = (bGPdata *)ob->data;
const bool do_center = (gpd->grid.lines <= 0) ? false : true;
float col_grid[4];
/* verify we have something to draw and valid values */
if (gpd->grid.scale[0] == 0.0f) {
gpd->grid.scale[0] = 1.0f;
}
if (gpd->grid.scale[1] == 0.0f) {
gpd->grid.scale[1] = 1.0f;
}
if (v3d->overlay.gpencil_grid_opacity < 0.1f) {
v3d->overlay.gpencil_grid_opacity = 0.1f;
}
/* set color */
copy_v3_v3(col_grid, gpd->grid.color);
col_grid[3] = v3d->overlay.gpencil_grid_opacity;
const int axis = ts->gp_sculpt.lock_axis;
const char *grid_unit = NULL;
const int gridlines = (gpd->grid.lines <= 0) ? 1 : gpd->grid.lines;
const float grid_w = gpd->grid.scale[0] * ED_scene_grid_scale(scene, &grid_unit);
const float grid_h = gpd->grid.scale[1] * ED_scene_grid_scale(scene, &grid_unit);
const float space_w = (grid_w / gridlines);
const float space_h = (grid_h / gridlines);
const float offset[2] = {gpd->grid.offset[0], gpd->grid.offset[1]};
const uint vertex_len = 2 * (gridlines * 4 + 2);
static GPUVertFormat format = {0};
static uint pos_id, color_id;
if (format.attr_len == 0) {
pos_id = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
color_id = GPU_vertformat_attr_add(&format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
}
GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
GPU_vertbuf_data_alloc(vbo, vertex_len);
int idx = 0;
for (int a = 1; a <= gridlines; a++) {
const float line_w = a * space_w;
const float line_h = a * space_h;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, -grid_w + offset[0], -line_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, +grid_w + offset[0], -line_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, -grid_w + offset[0], +line_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, +grid_w + offset[0], +line_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, -line_w + offset[0], -grid_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, -line_w + offset[0], +grid_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, +line_w + offset[0], -grid_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, +line_w + offset[0], +grid_h + offset[1], axis);
idx++;
}
/* center lines */
if (do_center) {
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, -grid_w + offset[0], 0.0f + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, +grid_w + offset[0], 0.0f + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, 0.0f + offset[0], -grid_h + offset[1], axis);
idx++;
set_grid_point(
vbo, idx, col_grid, pos_id, color_id, 0.0f + offset[0], +grid_h + offset[1], axis);
idx++;
}
return GPU_batch_create_ex(GPU_PRIM_LINES, vbo, NULL, GPU_BATCH_OWNS_VBO);
}
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