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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.
*
* Copyright 2016, Blender Foundation.
*/
/** \file
* \ingroup draw
*/
#pragma once
#include "BLI_sys_types.h" /* for bool and uint */
struct ARegion;
struct Base;
struct Depsgraph;
struct Object;
struct View3D;
struct rcti;
typedef struct SELECTID_ObjectData {
DrawData dd;
uint drawn_index;
bool is_drawn;
} SELECTID_ObjectData;
struct ObjectOffsets {
/* For convenience only. */
union {
uint offset;
uint face_start;
};
union {
uint face;
uint edge_start;
};
union {
uint edge;
uint vert_start;
};
uint vert;
};
typedef struct SELECTID_Context {
/* All context objects */
struct Object **objects;
/* Array with only drawn objects. When a new object is found within the rect,
* it is added to the end of the list.
* The list is reset to any viewport or context update. */
struct Object **objects_drawn;
struct ObjectOffsets *index_offsets;
uint objects_len;
uint objects_drawn_len;
/** Total number of element indices `index_offsets[object_drawn_len - 1].vert`. */
uint index_drawn_len;
short select_mode;
/* rect is used to check which objects whose indexes need to be drawn. */
rcti last_rect;
/* To check for updates. */
float persmat[4][4];
bool is_dirty;
} SELECTID_Context;
/* draw_select_buffer.c */
bool DRW_select_buffer_elem_get(uint sel_id, uint *r_elem, uint *r_base_index, char *r_elem_type);
uint DRW_select_buffer_context_offset_for_object_elem(struct Depsgraph *depsgraph,
struct Object *object,
char elem_type);
/**
* Main function to read a block of pixels from the select frame buffer.
*/
uint *DRW_select_buffer_read(struct Depsgraph *depsgraph,
struct ARegion *region,
struct View3D *v3d,
const rcti *rect,
uint *r_buf_len);
/**
* \param rect: The rectangle to sample indices from (min/max inclusive).
* \returns a #BLI_bitmap the length of \a bitmap_len or NULL on failure.
*/
uint *DRW_select_buffer_bitmap_from_rect(struct Depsgraph *depsgraph,
struct ARegion *region,
struct View3D *v3d,
const struct rcti *rect,
uint *r_bitmap_len);
/**
* \param center: Circle center.
* \param radius: Circle radius.
* \param r_bitmap_len: Number of indices in the selection id buffer.
* \returns a #BLI_bitmap the length of \a r_bitmap_len or NULL on failure.
*/
uint *DRW_select_buffer_bitmap_from_circle(struct Depsgraph *depsgraph,
struct ARegion *region,
struct View3D *v3d,
const int center[2],
int radius,
uint *r_bitmap_len);
/**
* \param poly: The polygon coordinates.
* \param poly_len: Length of the polygon.
* \param rect: Polygon boundaries.
* \returns a #BLI_bitmap.
*/
uint *DRW_select_buffer_bitmap_from_poly(struct Depsgraph *depsgraph,
struct ARegion *region,
struct View3D *v3d,
const int poly[][2],
int poly_len,
const struct rcti *rect,
uint *r_bitmap_len);
/**
* Samples a single pixel.
*/
uint DRW_select_buffer_sample_point(struct Depsgraph *depsgraph,
struct ARegion *region,
struct View3D *v3d,
const int center[2]);
/**
* Find the selection id closest to \a center.
* \param dist: Use to initialize the distance,
* when found, this value is set to the distance of the selection that's returned.
*/
uint DRW_select_buffer_find_nearest_to_point(struct Depsgraph *depsgraph,
struct ARegion *region,
struct View3D *v3d,
const int center[2],
uint id_min,
uint id_max,
uint *dist);
void DRW_select_buffer_context_create(struct Base **bases, uint bases_len, short select_mode);
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