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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BLI_compiler_compat.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "DNA_scene_types.h"
#include "BKE_customdata.h"
#include "BKE_material.h"
#include "BKE_paint.h"
namespace blender::bke::paint::canvas {
static TexPaintSlot *get_active_slot(Object *ob)
{
Material *mat = BKE_object_material_get(ob, ob->actcol);
if (mat == nullptr) {
return nullptr;
}
if (mat->texpaintslot == nullptr) {
return nullptr;
}
if (mat->paint_active_slot >= mat->tot_slots) {
return nullptr;
}
TexPaintSlot *slot = &mat->texpaintslot[mat->paint_active_slot];
return slot;
}
} // namespace blender::bke::paint::canvas
extern "C" {
using namespace blender::bke::paint::canvas;
Image *BKE_paint_canvas_image_get(const struct PaintModeSettings *settings, struct Object *ob)
{
switch (settings->canvas_source) {
case PAINT_CANVAS_SOURCE_COLOR_ATTRIBUTE:
return nullptr;
case PAINT_CANVAS_SOURCE_IMAGE:
return settings->canvas_image;
case PAINT_CANVAS_SOURCE_MATERIAL: {
TexPaintSlot *slot = get_active_slot(ob);
if (slot == nullptr) {
break;
}
return slot->ima;
}
}
return nullptr;
}
int BKE_paint_canvas_uvmap_layer_index_get(const struct PaintModeSettings *settings,
struct Object *ob)
{
switch (settings->canvas_source) {
case PAINT_CANVAS_SOURCE_COLOR_ATTRIBUTE:
return -1;
case PAINT_CANVAS_SOURCE_IMAGE: {
/* Use active uv map of the object. */
if (ob->type != OB_MESH) {
return -1;
}
const Mesh *mesh = static_cast<Mesh *>(ob->data);
return CustomData_get_active_layer_index(&mesh->ldata, CD_MLOOPUV);
}
case PAINT_CANVAS_SOURCE_MATERIAL: {
/* Use uv map of the canvas. */
TexPaintSlot *slot = get_active_slot(ob);
if (slot == nullptr) {
break;
}
if (ob->type != OB_MESH) {
return -1;
}
if (slot->uvname == nullptr) {
return -1;
}
const Mesh *mesh = static_cast<Mesh *>(ob->data);
return CustomData_get_named_layer_index(&mesh->ldata, CD_MLOOPUV, slot->uvname);
}
}
return -1;
}
}
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