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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 "ED_view3d.h"
#include "draw_cache_impl.h"
#include "overlay_private.h"
void OVERLAY_edit_curves_init(OVERLAY_Data *vedata)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
const DRWContextState *draw_ctx = DRW_context_state_get();
pd->edit_curves.do_zbufclip = XRAY_FLAG_ENABLED(draw_ctx->v3d);
/* Create view with depth offset. */
DRWView *default_view = (DRWView *)DRW_view_default_get();
pd->view_edit_curves_points = default_view;
}
void OVERLAY_edit_curves_cache_init(OVERLAY_Data *vedata)
{
OVERLAY_TextureList *txl = vedata->txl;
OVERLAY_PassList *psl = vedata->psl;
OVERLAY_PrivateData *pd = vedata->stl->pd;
/* Desired masks (write to color and depth) and blend mode for rendering. */
DRWState state = (DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_LESS_EQUAL | DRW_STATE_BLEND_ALPHA |
DRW_STATE_WRITE_DEPTH);
/* Common boilerplate for shading groups. */
DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
const DRWContextState *draw_ctx = DRW_context_state_get();
const View3D *v3d = draw_ctx->v3d;
GPUTexture **depth_tex = (pd->edit_curves.do_zbufclip) ? &dtxl->depth : &txl->dummy_depth_tx;
const float backwire_opacity = (pd->edit_curves.do_zbufclip) ? v3d->overlay.backwire_opacity :
1.0f;
/* Run Twice for in-front passes. */
for (int i = 0; i < 2; i++) {
DRW_PASS_CREATE(psl->edit_curves_points_ps[i], (state | pd->clipping_state));
GPUShader *sh = OVERLAY_shader_edit_curve_point();
DRWShadingGroup *grp = pd->edit_curves_points_grp[i] = DRW_shgroup_create(
sh, psl->edit_curves_points_ps[i]);
DRW_shgroup_uniform_block(grp, "globalsBlock", G_draw.block_ubo);
DRW_shgroup_uniform_float_copy(grp, "alpha", backwire_opacity);
DRW_shgroup_uniform_texture_ref(grp, "depthTex", depth_tex);
}
}
static void overlay_edit_curves_add_ob_to_pass(OVERLAY_PrivateData *pd, Object *ob, bool in_front)
{
Curves *curves = static_cast<Curves *>(ob->data);
DRWShadingGroup *point_shgrp = pd->edit_curves_points_grp[in_front];
struct GPUBatch *geom_points = DRW_curves_batch_cache_get_edit_points(curves);
DRW_shgroup_call_no_cull(point_shgrp, geom_points, ob);
}
void OVERLAY_edit_curves_cache_populate(OVERLAY_Data *vedata, Object *ob)
{
OVERLAY_PrivateData *pd = vedata->stl->pd;
if (pd->edit_curves.do_zbufclip) {
overlay_edit_curves_add_ob_to_pass(pd, ob, false);
}
else {
overlay_edit_curves_add_ob_to_pass(pd, ob, true);
}
}
void OVERLAY_edit_curves_draw(OVERLAY_Data *vedata)
{
OVERLAY_PassList *psl = vedata->psl;
OVERLAY_PrivateData *pd = vedata->stl->pd;
if (pd->edit_curves.do_zbufclip) {
DRW_view_set_active(pd->view_edit_curves_points);
DRW_draw_pass(psl->edit_curves_points_ps[NOT_IN_FRONT]);
}
else {
DRW_view_set_active(pd->view_edit_curves_points);
DRW_draw_pass(psl->edit_curves_points_ps[IN_FRONT]);
}
}
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