92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
// Copyright 2016 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <cstddef>
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#include "Common/BitField.h"
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#include "Common/CommonTypes.h"
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#include "VideoBackends/Vulkan/VulkanLoader.h"
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namespace Vulkan
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{
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// Number of command buffers. Having two allows one buffer to be
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// executed whilst another is being built.
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constexpr size_t NUM_COMMAND_BUFFERS = 2;
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// Staging buffer usage - optimize for uploads or readbacks
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enum STAGING_BUFFER_TYPE
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{
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STAGING_BUFFER_TYPE_UPLOAD,
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STAGING_BUFFER_TYPE_READBACK
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};
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// Descriptor set layouts
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enum DESCRIPTOR_SET_LAYOUT
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{
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DESCRIPTOR_SET_LAYOUT_STANDARD_UNIFORM_BUFFERS,
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DESCRIPTOR_SET_LAYOUT_STANDARD_SAMPLERS,
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DESCRIPTOR_SET_LAYOUT_STANDARD_SHADER_STORAGE_BUFFERS,
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DESCRIPTOR_SET_LAYOUT_UTILITY_UNIFORM_BUFFER,
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DESCRIPTOR_SET_LAYOUT_UTILITY_SAMPLERS,
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DESCRIPTOR_SET_LAYOUT_COMPUTE,
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NUM_DESCRIPTOR_SET_LAYOUTS
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};
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// We use four pipeline layouts:
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// - Standard
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// - Per-stage UBO (VS/GS/PS, VS constants accessible from PS) [set=0, binding=0-2]
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// - 8 combined image samplers (accessible from PS) [set=1, binding=0-7]
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// - 1 SSBO accessible from PS if supported [set=2, binding=0]
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// - Utility
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// - 1 combined UBO, accessible from VS/GS/PS [set=0, binding=0]
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// - 8 combined image samplers (accessible from PS) [set=1, binding=0-7]
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// - 1 texel buffer (accessible from PS) [set=1, binding=8]
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// - Compute
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// - 1 uniform buffer [set=0, binding=0]
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// - 2 combined image samplers [set=0, binding=1-2]
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// - 2 texel buffers [set=0, binding=3-4]
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// - 1 storage image [set=0, binding=5]
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//
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// All four pipeline layout share the first two descriptor sets (uniform buffers, PS samplers).
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// The third descriptor set (see bind points above) is used for storage or texel buffers.
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//
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enum PIPELINE_LAYOUT
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{
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PIPELINE_LAYOUT_STANDARD,
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PIPELINE_LAYOUT_UTILITY,
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PIPELINE_LAYOUT_COMPUTE,
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NUM_PIPELINE_LAYOUTS
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};
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// Uniform buffer bindings within the first descriptor set
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enum UNIFORM_BUFFER_DESCRIPTOR_SET_BINDING
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{
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UBO_DESCRIPTOR_SET_BINDING_PS,
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UBO_DESCRIPTOR_SET_BINDING_VS,
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UBO_DESCRIPTOR_SET_BINDING_GS,
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NUM_UBO_DESCRIPTOR_SET_BINDINGS
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};
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// Maximum number of attributes per vertex (we don't have any more than this?)
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constexpr u32 MAX_VERTEX_ATTRIBUTES = 16;
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// Number of pixel shader texture slots
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constexpr u32 NUM_PIXEL_SHADER_SAMPLERS = 8;
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constexpr u32 NUM_COMPUTE_SHADER_SAMPLERS = 2;
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// Number of texel buffer binding points.
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constexpr u32 NUM_COMPUTE_TEXEL_BUFFERS = 2;
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// Textures that don't fit into this buffer will be uploaded with a separate buffer (see below).
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constexpr u32 TEXTURE_UPLOAD_BUFFER_SIZE = 32 * 1024 * 1024;
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// Textures greater than 1024*1024 will be put in staging textures that are released after
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// execution instead. A 2048x2048 texture is 16MB, and we'd only fit four of these in our
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// streaming buffer and be blocking frequently. Games are unlikely to have textures this
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// large anyway, so it's only really an issue for HD texture packs, and memory is not
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// a limiting factor in these scenarios anyway.
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constexpr u32 STAGING_TEXTURE_UPLOAD_THRESHOLD = 1024 * 1024 * 4;
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} // namespace Vulkan
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