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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. */
/** \file
* \ingroup draw_engine
*/
#include "DRW_render.h"
#include "draw_cache_impl.h"
#include "overlay_private.h"
#include "BKE_curves.hh"
void OVERLAY_sculpt_curves_cache_init(OVERLAY_Data *vedata)
{
OVERLAY_PassList *psl = vedata->psl;
OVERLAY_PrivateData *pd = vedata->stl->pd;
const DRWState state = DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_EQUAL | DRW_STATE_BLEND_ALPHA;
DRW_PASS_CREATE(psl->sculpt_curves_selection_ps, state | pd->clipping_state);
GPUShader *sh = OVERLAY_shader_sculpt_curves_selection();
pd->sculpt_curves_selection_grp = DRW_shgroup_create(sh, psl->sculpt_curves_selection_ps);
DRWShadingGroup *grp = pd->sculpt_curves_selection_grp;
/* Reuse the same mask opacity from sculpt mode, since it wasn't worth it to add a different
* property yet. */
DRW_shgroup_uniform_float_copy(grp, "selection_opacity", pd->overlay.sculpt_mode_mask_opacity);
}
static bool everything_selected(const Curves &curves_id)
{
if (!(curves_id.flag & CV_SCULPT_SELECTION_ENABLED)) {
/* When the selection is disabled, conceptually everything is selected. */
return true;
}
const blender::bke::CurvesGeometry &curves = blender::bke::CurvesGeometry::wrap(
curves_id.geometry);
blender::VArray<float> selection;
switch (curves_id.selection_domain) {
case ATTR_DOMAIN_POINT:
selection = curves.selection_point_float();
break;
case ATTR_DOMAIN_CURVE:
selection = curves.selection_curve_float();
break;
}
return selection.is_single() && selection.get_internal_single() == 1.0f;
}
void OVERLAY_sculpt_curves_cache_populate(OVERLAY_Data *vedata, Object *object)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
Curves *curves = static_cast<Curves *>(object->data);
/* As an optimization, return early if everything is selected. */
if (everything_selected(*curves)) {
return;
}
/* Retrieve the location of the texture. */
const char *name = curves->selection_domain == ATTR_DOMAIN_POINT ? ".selection_point_float" :
".selection_curve_float";
bool is_point_domain;
GPUTexture **texture = DRW_curves_texture_for_evaluated_attribute(
curves, name, &is_point_domain);
if (texture == nullptr) {
return;
}
/* Evaluate curves and their attributes if necessary. */
DRWShadingGroup *grp = DRW_shgroup_curves_create_sub(
object, pd->sculpt_curves_selection_grp, nullptr);
if (*texture == nullptr) {
return;
}
DRW_shgroup_uniform_bool_copy(grp, "is_point_domain", is_point_domain);
DRW_shgroup_uniform_texture(grp, "selection_tx", *texture);
}
void OVERLAY_sculpt_curves_draw(OVERLAY_Data *vedata)
{
OVERLAY_PassList *psl = vedata->psl;
OVERLAY_PrivateData *pd = vedata->stl->pd;
OVERLAY_FramebufferList *fbl = vedata->fbl;
if (DRW_state_is_fbo()) {
GPU_framebuffer_bind(pd->painting.in_front ? fbl->overlay_in_front_fb :
fbl->overlay_default_fb);
}
DRW_draw_pass(psl->sculpt_curves_selection_ps);
}
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