Differential D15817 Diff 55261 source/blender/draw/intern/draw_command_shared.hh

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source/blender/draw/intern/draw_command_shared.hh

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				/* SPDX-License-Identifier: GPL-2.0-or-later
				* Copyright 2022 Blender Foundation. */

				/** \file
				* \ingroup draw
				*/

				#ifndef GPU_SHADER
				# include "BLI_span.hh"
				# include "GPU_shader_shared_utils.h"

				namespace blender::draw::command {

				struct RecordingState;

				#endif

				/* -------------------------------------------------------------------- */
				/** \name Multi Draw
				* \{ */

				/**
				* A DrawGroup allow to split the command stream into batch-able chunks of commands with
				* the same render state.
				*/
				struct DrawGroup {
				/** Index of next DrawGroup from the same header. */
				uint next;

				/** Index of the first instances after sorting. */
				uint start;
				/** Total number of instances (including inverted facing). Needed to issue the draw call. */
				uint len;
				/** Number of non inverted scaling instances in this Group. */
				uint front_facing_len;

				/** GPUBatch values to be copied to DrawCommand after sorting (if not overriden). */
				int vertex_len;
				int vertex_first;
				int base_index;

				/** Atomic counters used during command sorting. */
				uint total_counter;

				#ifndef GPU_SHADER
				/* NOTE: Union just to make sure the struct has always the same size on all platform. */
				union {
				struct {
				/** For debug printing only. */
				uint front_proto_len;
				uint back_proto_len;
				/** Needed to create the correct draw call. */
				GPUBatch *gpu_batch;
				};
				struct {
				#endif
				uint front_facing_counter;
				uint back_facing_counter;
				uint _pad0, _pad1;
				#ifndef GPU_SHADER
				};
				};
				#endif
				};
				BLI_STATIC_ASSERT_ALIGN(DrawGroup, 16)

				/**
				* Representation of a future draw call inside a DrawGroup. This #DrawPrototype is then
				* converted into #DrawCommand on GPU after visibility and compaction. Multiple
				* #DrawPrototype might get merged into the same final #DrawCommand.
				*/
				struct DrawPrototype {
				/* Reference to parent DrawGroup to get the GPUBatch vertex / instance count. */
				uint group_id;
				/* Resource handle associated with this call. Also reference visibility. */
				uint resource_handle;
				/* Number of instances. */
				uint instance_len;
				uint _pad0;
				};
				BLI_STATIC_ASSERT_ALIGN(DrawPrototype, 16)

				/** \} */

				#ifndef GPU_SHADER
				}; // namespace blender::draw::command
				#endif