93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/* SPDX-FileCopyrightText: 2017 Blender Foundation. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup gpu
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*
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* Glue to make the new Select-Next engine work with the old GPU select API.
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*/
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#include <cfloat>
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#include "BLI_rect.h"
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#include "BLI_span.hh"
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#include "GPU_select.h"
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#include "gpu_select_private.h"
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struct GPUSelectNextState {
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/** Result buffer set on initialization. */
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GPUSelectResult *buffer;
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uint buffer_len;
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/** Area of the viewport to render / select from. */
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rcti rect;
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/** Number of hits. Set to -1 if it overflows buffer_len. */
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uint hits;
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/** Mode of operation. */
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eGPUSelectMode mode;
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};
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static GPUSelectNextState g_state = {};
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void gpu_select_next_begin(GPUSelectResult *buffer,
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uint buffer_len,
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const rcti *input,
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eGPUSelectMode mode)
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{
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g_state.buffer = buffer;
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g_state.rect = *input;
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g_state.buffer_len = buffer_len;
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g_state.mode = mode;
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}
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int gpu_select_next_get_pick_area_center()
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{
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BLI_assert(BLI_rcti_size_x(&g_state.rect) == BLI_rcti_size_y(&g_state.rect));
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return BLI_rcti_size_x(&g_state.rect) / 2;
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}
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eGPUSelectMode gpu_select_next_get_mode()
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{
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return g_state.mode;
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}
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void gpu_select_next_set_result(GPUSelectResult *hit_buf, uint hit_len)
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{
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if (hit_len > g_state.buffer_len) {
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g_state.hits = -1;
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return;
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}
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blender::MutableSpan<GPUSelectResult> result(g_state.buffer, g_state.buffer_len);
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blender::Span<GPUSelectResult> hits(hit_buf, hit_len);
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/* TODO(fclem): There might be some conversion to do to align to the other APIs output. */
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switch (g_state.mode) {
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case eGPUSelectMode::GPU_SELECT_ALL:
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result.take_front(hit_len).copy_from(hits);
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break;
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case eGPUSelectMode::GPU_SELECT_NEAREST_FIRST_PASS:
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result.take_front(hit_len).copy_from(hits);
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break;
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case eGPUSelectMode::GPU_SELECT_NEAREST_SECOND_PASS:
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result.take_front(hit_len).copy_from(hits);
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break;
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case eGPUSelectMode::GPU_SELECT_PICK_ALL:
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result.take_front(hit_len).copy_from(hits);
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break;
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case eGPUSelectMode::GPU_SELECT_PICK_NEAREST:
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result.take_front(hit_len).copy_from(hits);
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break;
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}
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g_state.hits = hit_len;
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}
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uint gpu_select_next_end()
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{
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return g_state.hits;
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}
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