diff options
Diffstat (limited to 'source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c')
| -rw-r--r-- | source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c | 739 |
1 files changed, 739 insertions, 0 deletions
diff --git a/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c b/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c new file mode 100644 index 00000000000..dd5db85f3f4 --- /dev/null +++ b/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c @@ -0,0 +1,739 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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 + * + * Contributor(s): Antonio Vazquez + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file draw/engines/gpencil/gpencil_draw_cache_impl.c + * \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_gpencil.h" +#include "BKE_action.h" + +#include "DRW_render.h" + +#include "GPU_immediate.h" +#include "GPU_draw.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, float matrix[4][4], const bGPDspoint *pt, int idx, + uint pos_id, uint color_id, + uint thickness_id, uint uvdata_id, short thickness, + const float ink[4]) +{ + float viewfpt[3]; + + 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 */ + mul_v3_m4v3(viewfpt, matrix, &pt->x); + 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); +} + +/* create batch geometry data for points stroke shader */ +GPUBatch *DRW_gpencil_get_point_geom(bGPDstroke *gps, short thickness, const float ink[4]) +{ + static GPUVertFormat format = { 0 }; + static uint pos_id, color_id, size_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); + size_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, gps->totpoints); + + /* draw stroke curve */ + const bGPDspoint *pt = gps->points; + int idx = 0; + 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(vbo, color_id, idx, col); + GPU_vertbuf_attr_set(vbo, size_id, idx, &thick); + + /* 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); + + GPU_vertbuf_attr_set(vbo, pos_id, idx, &pt->x); + idx++; + } + + return GPU_batch_create_ex(GPU_PRIM_POINTS, vbo, NULL, GPU_BATCH_OWNS_VBO); +} + +/* create batch geometry data for stroke shader */ +GPUBatch *DRW_gpencil_get_stroke_geom(bGPDframe *gpf, 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; + + 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 + cyclic_add + 2); + + /* draw stroke curve */ + const bGPDspoint *pt = points; + int idx = 0; + 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(vbo, gpf->runtime.viewmatrix, &points[totpoints - 1], idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, ink); + idx++; + } + else { + gpencil_set_stroke_point(vbo, gpf->runtime.viewmatrix, &points[1], idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, ink); + idx++; + } + } + /* set point */ + gpencil_set_stroke_point(vbo, gpf->runtime.viewmatrix, pt, idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, ink); + idx++; + } + + if (gps->flag & GP_STROKE_CYCLIC && totpoints > 2) { + /* draw line to first point to complete the cycle */ + gpencil_set_stroke_point(vbo, gpf->runtime.viewmatrix, &points[0], idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, ink); + idx++; + /* now add adjacency point (not drawn) */ + gpencil_set_stroke_point(vbo, gpf->runtime.viewmatrix, &points[1], idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, ink); + idx++; + } + /* last adjacency point (not drawn) */ + else { + gpencil_set_stroke_point(vbo, gpf->runtime.viewmatrix, &points[totpoints - 2], idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, ink); + } + + return GPU_batch_create_ex(GPU_PRIM_LINE_STRIP_ADJ, vbo, NULL, GPU_BATCH_OWNS_VBO); +} + +/* create batch geometry data for current buffer stroke shader */ +GPUBatch *DRW_gpencil_get_buffer_stroke_geom(bGPdata *gpd, float matrix[4][4], short thickness) +{ + const DRWContextState *draw_ctx = DRW_context_state_get(); + Scene *scene = draw_ctx->scene; + View3D *v3d = draw_ctx->v3d; + 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 + 2); + + /* draw stroke curve */ + const tGPspoint *tpt = points; + bGPDspoint pt, pt2; + int idx = 0; + + /* get origin to reproject point */ + float origin[3]; + bGPDlayer *gpl = BKE_gpencil_layer_getactive(gpd); + ED_gp_get_drawing_reference(v3d, 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(ob, rv3d, origin, ts->gp_sculpt.lock_axis - 1, &pt); + + /* first point for adjacency (not drawn) */ + if (i == 0) { + if (totpoints > 1) { + ED_gpencil_tpoint_to_point(ar, origin, &points[1], &pt2); + gpencil_set_stroke_point(vbo, matrix, &pt2, idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor); + } + else { + gpencil_set_stroke_point(vbo, matrix, &pt, idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor); + } + idx++; + } + /* set point */ + gpencil_set_stroke_point(vbo, matrix, &pt, idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor); + idx++; + } + + /* last adjacency point (not drawn) */ + if (totpoints > 2) { + ED_gpencil_tpoint_to_point(ar, origin, &points[totpoints - 2], &pt2); + gpencil_set_stroke_point(vbo, matrix, &pt2, idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor); + } + else { + gpencil_set_stroke_point(vbo, matrix, &pt, idx, + pos_id, color_id, thickness_id, uvdata_id, thickness, gpd->runtime.scolor); + } + + 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, float matrix[4][4], short thickness) +{ + const DRWContextState *draw_ctx = DRW_context_state_get(); + Scene *scene = draw_ctx->scene; + View3D *v3d = draw_ctx->v3d; + 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(v3d, 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(ob, rv3d, origin, ts->gp_sculpt.lock_axis - 1, &pt); + + /* set point */ + gpencil_set_stroke_point(vbo, matrix, &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 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; + View3D *v3d = draw_ctx->v3d; + 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(v3d, 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); +} + +/* create batch geometry data for stroke shader */ +GPUBatch *DRW_gpencil_get_fill_geom(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_CACHES) || (gps->tot_triangles == 0) || (gps->triangles == NULL)) { + DRW_gpencil_triangulate_stroke_fill(gps); + ED_gpencil_calc_stroke_uv(ob, gps); + } + + BLI_assert(gps->tot_triangles >= 1); + + static GPUVertFormat format = { 0 }; + static uint pos_id, color_id, text_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); + text_id = GPU_vertformat_attr_add(&format, "texCoord", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); + } + + GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format); + GPU_vertbuf_data_alloc(vbo, gps->tot_triangles * 3); + + /* Draw all triangles for filling the polygon (cache must be calculated before) */ + bGPDtriangle *stroke_triangle = gps->triangles; + int idx = 0; + for (int i = 0; i < gps->tot_triangles; i++, stroke_triangle++) { + for (int j = 0; j < 3; j++) { + gpencil_set_fill_point( + vbo, idx, &gps->points[stroke_triangle->verts[j]], color, stroke_triangle->uv[j], + pos_id, color_id, text_id); + idx++; + } + } + + return GPU_batch_create_ex(GPU_PRIM_TRIS, vbo, NULL, GPU_BATCH_OWNS_VBO); +} + +/* Draw selected verts for strokes being edited */ +GPUBatch *DRW_gpencil_get_edit_geom(bGPDstroke *gps, float alpha, short dflag) +{ + const DRWContextState *draw_ctx = DRW_context_state_get(); + Object *ob = draw_ctx->obact; + bGPdata *gpd = ob->data; + 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; + + 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); + color_id = GPU_vertformat_attr_add(&format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT); + size_id = GPU_vertformat_attr_add(&format, "size", GPU_COMP_F32, 1, GPU_FETCH_FLOAT); + } + + GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format); + GPU_vertbuf_data_alloc(vbo, 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; + + int idx = 0; + float fcolor[4]; + float fsize = 0; + for (int i = 0; i < gps->totpoints; i++, pt++, dvert++) { + /* weight paint */ + if (is_weight_paint) { + float weight = BKE_gpencil_vgroup_use_index(dvert, vgindex); + CLAMP(weight, 0.0f, 1.0f); + 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, gps->runtime.tmp_stroke_rgba); + fsize = bsize; + } + } + + GPU_vertbuf_attr_set(vbo, color_id, idx, fcolor); + GPU_vertbuf_attr_set(vbo, size_id, idx, &fsize); + GPU_vertbuf_attr_set(vbo, pos_id, idx, &pt->x); + idx++; + } + + return GPU_batch_create_ex(GPU_PRIM_POINTS, vbo, NULL, GPU_BATCH_OWNS_VBO); +} + +/* Draw lines for strokes being edited */ +GPUBatch *DRW_gpencil_get_edlin_geom(bGPDstroke *gps, float alpha, short UNUSED(dflag)) +{ + const DRWContextState *draw_ctx = DRW_context_state_get(); + Object *ob = draw_ctx->obact; + bGPdata *gpd = ob->data; + 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); + + 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, gps->totpoints); + + /* Draw all the stroke lines (selected or not) */ + bGPDspoint *pt = gps->points; + + /* GPXX: for some converted files, this struct could be null + * maybe we can remove this and move to versioning code after + * merge */ + if (gps->dvert == NULL) { + gps->dvert = MEM_callocN(sizeof(MDeformVert) * gps->totpoints, "gp_stroke_weights"); + } + + MDeformVert *dvert = gps->dvert; + + int idx = 0; + float fcolor[4]; + for (int i = 0; i < gps->totpoints; i++, pt++, dvert++) { + /* weight paint */ + if (is_weight_paint) { + float weight = BKE_gpencil_vgroup_use_index(dvert, vgindex); + CLAMP(weight, 0.0f, 1.0f); + 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(vbo, color_id, idx, fcolor); + GPU_vertbuf_attr_set(vbo, pos_id, idx, &pt->x); + idx++; + } + + return GPU_batch_create_ex(GPU_PRIM_LINE_STRIP, vbo, NULL, GPU_BATCH_OWNS_VBO); +} + +static void set_grid_point(GPUVertBuf *vbo, int idx, float col_grid[4], + uint pos_id, uint color_id, + float v1, float v2, int axis) +{ + GPU_vertbuf_attr_set(vbo, color_id, idx, col_grid); + + float pos[3]; + /* Set the grid in the selected axis (default is always Y axis) */ + if (axis & V3D_GP_GRID_AXIS_X) { + pos[0] = 0.0f; + pos[1] = v1; + pos[2] = v2; + } + else if (axis & V3D_GP_GRID_AXIS_Z) { + pos[0] = v1; + pos[1] = v2; + pos[2] = 0.0f; + } + else + { + pos[0] = v1; + pos[1] = 0.0f; + pos[2] = v2; + } + + + + GPU_vertbuf_attr_set(vbo, pos_id, idx, pos); +} + +/* Draw grid lines */ +GPUBatch *DRW_gpencil_get_grid(void) +{ + const DRWContextState *draw_ctx = DRW_context_state_get(); + Scene *scene = draw_ctx->scene; + ToolSettings *ts = scene->toolsettings; + View3D *v3d = draw_ctx->v3d; + + float col_grid[4]; + + /* verify we have something to draw and valid values */ + if (v3d->overlay.gpencil_grid_lines < 1) { + v3d->overlay.gpencil_grid_lines = GP_DEFAULT_GRID_LINES; + } + + if (v3d->overlay.gpencil_grid_scale == 0.0f) { + v3d->overlay.gpencil_grid_scale = 1.0f; + } + + if (v3d->overlay.gpencil_grid_opacity < 0.1f) { + v3d->overlay.gpencil_grid_opacity = 0.1f; + } + + UI_GetThemeColor3fv(TH_GRID, col_grid); + col_grid[3] = v3d->overlay.gpencil_grid_opacity; + + /* if use locked axis, copy value */ + int axis = v3d->overlay.gpencil_grid_axis; + if ((v3d->overlay.gpencil_grid_axis & V3D_GP_GRID_AXIS_LOCK) == 0) { + + axis = v3d->overlay.gpencil_grid_axis; + } + else { + switch (ts->gp_sculpt.lock_axis) { + case GP_LOCKAXIS_X: + { + axis = V3D_GP_GRID_AXIS_X; + break; + } + case GP_LOCKAXIS_NONE: + case GP_LOCKAXIS_Y: + { + axis = V3D_GP_GRID_AXIS_Y; + break; + } + case GP_LOCKAXIS_Z: + { + axis = V3D_GP_GRID_AXIS_Z; + break; + } + } + } + + const char *grid_unit = NULL; + const int gridlines = v3d->overlay.gpencil_grid_lines; + const float grid_scale = v3d->overlay.gpencil_grid_scale * ED_scene_grid_scale(scene, &grid_unit); + const float grid = grid_scale; + const float space = (grid_scale / gridlines); + + 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 = a * space; + + set_grid_point(vbo, idx, col_grid, pos_id, color_id, -grid, -line, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, +grid, -line, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, -grid, +line, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, +grid, +line, axis); + idx++; + + set_grid_point(vbo, idx, col_grid, pos_id, color_id, -line, -grid, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, -line, +grid, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, +line, -grid, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, +line, +grid, axis); + idx++; + } + /* center lines */ + set_grid_point(vbo, idx, col_grid, pos_id, color_id, -grid, 0.0f, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, +grid, 0.0f, axis); + idx++; + + set_grid_point(vbo, idx, col_grid, pos_id, color_id, 0.0f, -grid, axis); + idx++; + set_grid_point(vbo, idx, col_grid, pos_id, color_id, 0.0f, +grid, axis); + idx++; + + return GPU_batch_create_ex(GPU_PRIM_LINES, vbo, NULL, GPU_BATCH_OWNS_VBO); +} |