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blender-archive/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c
Antonio Vazquez 7f29fc7415 Fix T65691: GPencil Drawing long strokes turn invisible 
There was a fixed limit to the number of points available in a buffer stroke.

Now, the array is expanded as needed using a predefined number of points for each expansion, instead to add one by one. This is done to reduce the number of times the memory allocation is required.

As part of the fix, some variables have been renamed to reflect better their use.
2019-07-30 17:11:56 +02:00

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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 buffer_stroke point to vbo */
static void gpencil_set_buffer_stroke_point(GPUVertBuf *vbo,
const bGPDspoint *pt,
int idx,
uint pos_id,
uint color_id,
uint thickness_id,
uint uvdata_id,
uint prev_pos_id,
float ref_pt[3],
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);
/* reference point to follow drawing path */
GPU_vertbuf_attr_set(vbo, prev_pos_id, idx, ref_pt);
}
/* 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 gpencil_get_point_geom(GpencilBatchCacheElem *be,
bGPDstroke *gps,
short thickness,
const float ink[4],
const int alignment_mode)
{
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;
float fpt[3];
if (alignment_mode != GP_STYLE_FOLLOW_PATH) {
/* add small offset to get a vector */
copy_v3_v3(fpt, &pt->x);
fpt[0] += 0.00001f;
fpt[1] += 0.00001f;
GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, fpt);
}
else {
if (i == 0) {
if (gps->totpoints > 1) {
/* extrapolate a point before first point */
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 {
/* add small offset to get a vector */
copy_v3_v3(fpt, &pt->x);
fpt[0] += 0.00001f;
fpt[1] += 0.00001f;
GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, fpt);
}
}
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 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 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)) {
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 *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_used;
/* 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 *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_used;
static GPUVertFormat format = {0};
static uint pos_id, color_id, thickness_id, uvdata_id, prev_pos_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);
prev_pos_id = GPU_vertformat_attr_add(&format, "prev_pos", GPU_COMP_F32, 3, 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);
/* use previous point to determine stroke direction (drawing path) */
bGPDspoint pt2;
float ref_pt[3];
if (i == 0) {
if (totpoints > 1) {
/* extrapolate a point before first point */
tGPspoint *tpt2 = &points[1];
ED_gpencil_tpoint_to_point(ar, origin, tpt2, &pt2);
ED_gp_project_point_to_plane(scene, ob, rv3d, origin, ts->gp_sculpt.lock_axis - 1, &pt2);
interp_v3_v3v3(ref_pt, &pt2.x, &pt.x, 1.5f);
}
else {
copy_v3_v3(ref_pt, &pt.x);
}
}
else {
tGPspoint *tpt2 = &points[i - 1];
ED_gpencil_tpoint_to_point(ar, origin, tpt2, &pt2);
ED_gp_project_point_to_plane(scene, ob, rv3d, origin, ts->gp_sculpt.lock_axis - 1, &pt2);
copy_v3_v3(ref_pt, &pt2.x);
}
/* set point */
gpencil_set_buffer_stroke_point(vbo,
&pt,
idx,
pos_id,
color_id,
thickness_id,
uvdata_id,
prev_pos_id,
ref_pt,
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 *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 *gpencil_get_buffer_fill_geom(bGPdata *gpd)
{
if (gpd == NULL) {
return NULL;
}
const tGPspoint *points = gpd->runtime.sbuffer;
int totpoints = gpd->runtime.sbuffer_used;
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 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 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 *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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