GPU_select.hh

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/* SPDX-FileCopyrightText: 2014 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include "BLI_span.hh"
#include "BLI_sys_types.h"
#include "BLI_vector.hh"
 
struct rcti;

enum eGPUSelectMode {
  GPU_SELECT_INVALID = 0,
  GPU_SELECT_ALL = 1,
  /* gpu_select_query */
  GPU_SELECT_NEAREST_FIRST_PASS = 2,
  GPU_SELECT_NEAREST_SECOND_PASS = 3,
  /* gpu_select_pick */
  GPU_SELECT_PICK_ALL = 4,
  GPU_SELECT_PICK_NEAREST = 5,
};

struct GPUSelectResult {
  unsigned int id;
  unsigned int depth;
};
 
using GPUSelectStorage = blender::Vector<GPUSelectResult, 2500>;
struct GPUSelectBuffer {
  GPUSelectStorage storage;
};

void GPU_select_begin(GPUSelectBuffer *buffer,
                      const rcti *input,
                      eGPUSelectMode mode,
                      int oldhits);
void GPU_select_begin_next(GPUSelectBuffer *buffer,
                           const rcti *input,
                           eGPUSelectMode mode,
                           int oldhits);
bool GPU_select_load_id(unsigned int id);
void GPU_select_finalize();
unsigned int GPU_select_end();
 
/* Cache selection region. */
 
bool GPU_select_is_cached();
void GPU_select_cache_begin();
void GPU_select_cache_load_id();
void GPU_select_cache_end();
 
/* Utilities. */

const GPUSelectResult *GPU_select_buffer_near(const blender::Span<GPUSelectResult> hit_results);
uint GPU_select_buffer_remove_by_id(blender::MutableSpan<GPUSelectResult> hit_results,
                                    uint select_id);
void GPU_select_buffer_stride_realign(const rcti *src, const rcti *dst, uint *r_buf);