1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
// Copyright 2025 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/PipelineUtils.h"
#include "Common/Assert.h"
#include "Common/Logging/Log.h"
#include "VideoCommon/BPMemory.h"
#include "VideoCommon/ConstantManager.h"
#include "VideoCommon/DriverDetails.h"
#include "VideoCommon/GeometryShaderGen.h"
#include "VideoCommon/PixelShaderGen.h"
#include "VideoCommon/RenderState.h"
#include "VideoCommon/VertexShaderGen.h"
#include "VideoCommon/VideoConfig.h"
namespace VideoCommon
{
/// Edits the UID based on driver bugs and other special configurations
GXPipelineUid ApplyDriverBugs(const GXPipelineUid& in)
{
GXPipelineUid out;
// TODO: static_assert(std::is_trivially_copyable_v<GXPipelineUid>);
// GXPipelineUid is not trivially copyable because RasterizationState and BlendingState aren't
// either, but we can pretend it is for now. This will be improved after PR #10848 is finished.
memcpy(static_cast<void*>(&out), static_cast<const void*>(&in), sizeof(out)); // copy padding
pixel_shader_uid_data* ps = out.ps_uid.GetUidData();
BlendingState& blend = out.blending_state;
if (ps->ztest == EmulatedZ::ForcedEarly && !out.depth_state.update_enable)
{
// No need to force early depth test if you're not writing z
ps->ztest = EmulatedZ::Early;
}
// If framebuffer fetch is available, we can emulate logic ops in the fragment shader
// and don't need the below blend approximation
if (blend.logic_op_enable && !g_backend_info.bSupportsLogicOp &&
!g_backend_info.bSupportsFramebufferFetch)
{
if (!blend.LogicOpApproximationIsExact())
WARN_LOG_FMT(VIDEO,
"Approximating logic op with blending, this will produce incorrect rendering.");
if (blend.LogicOpApproximationWantsShaderHelp())
{
ps->emulate_logic_op_with_blend = true;
ps->logic_op_mode = static_cast<u32>(blend.logic_mode.Value());
}
blend.ApproximateLogicOpWithBlending();
}
const bool benefits_from_ps_dual_source_off =
(!g_backend_info.bSupportsDualSourceBlend && g_backend_info.bSupportsFramebufferFetch) ||
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DUAL_SOURCE_BLENDING);
if (benefits_from_ps_dual_source_off && !blend.RequiresDualSrc())
{
// Only use dual-source blending when required on drivers that don't support it very well.
ps->no_dual_src = true;
blend.use_dual_src = false;
}
if (g_backend_info.bSupportsFramebufferFetch)
{
bool fbfetch_blend = false;
if ((DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DISCARD_WITH_EARLY_Z) ||
!g_backend_info.bSupportsEarlyZ) &&
ps->ztest == EmulatedZ::ForcedEarly)
{
ps->ztest = EmulatedZ::EarlyWithFBFetch;
fbfetch_blend |= static_cast<bool>(out.blending_state.blend_enable);
ps->no_dual_src = true;
}
fbfetch_blend |= blend.logic_op_enable && !g_backend_info.bSupportsLogicOp;
fbfetch_blend |= blend.use_dual_src && !g_backend_info.bSupportsDualSourceBlend;
if (fbfetch_blend)
{
ps->no_dual_src = true;
if (blend.logic_op_enable)
{
ps->logic_op_enable = true;
ps->logic_op_mode = static_cast<u32>(blend.logic_mode.Value());
blend.logic_op_enable = false;
}
if (blend.blend_enable)
{
ps->blend_enable = true;
ps->blend_src_factor = blend.src_factor;
ps->blend_src_factor_alpha = blend.src_factor_alpha;
ps->blend_dst_factor = blend.dst_factor;
ps->blend_dst_factor_alpha = blend.dst_factor_alpha;
ps->blend_subtract = blend.subtract;
ps->blend_subtract_alpha = blend.subtract_alpha;
blend.blend_enable = false;
}
}
}
// force dual src off if we can't support it
if (!g_backend_info.bSupportsDualSourceBlend)
{
ps->no_dual_src = true;
blend.use_dual_src = false;
}
if (ps->ztest == EmulatedZ::ForcedEarly && !g_backend_info.bSupportsEarlyZ)
{
// These things should be false
ASSERT(!ps->zfreeze);
// ZCOMPLOC HACK:
// The only way to emulate alpha test + early-z is to force early-z in the shader.
// As this isn't available on all drivers and as we can't emulate this feature otherwise,
// we are only able to choose which one we want to respect more.
// Tests seem to have proven that writing depth even when the alpha test fails is more
// important that a reliable alpha test, so we just force the alpha test to always succeed.
// At least this seems to be less buggy.
ps->ztest = EmulatedZ::EarlyWithZComplocHack;
}
if (g_ActiveConfig.UseVSForLinePointExpand() &&
(out.rasterization_state.primitive == PrimitiveType::Points ||
out.rasterization_state.primitive == PrimitiveType::Lines))
{
// All primitives are expanded to triangles in the vertex shader
vertex_shader_uid_data* vs = out.vs_uid.GetUidData();
const PortableVertexDeclaration& decl = out.vertex_format->GetVertexDeclaration();
vs->position_has_3_elems = decl.position.components >= 3;
vs->texcoord_elem_count = 0;
for (int i = 0; i < 8; i++)
{
if (decl.texcoords[i].enable)
{
ASSERT(decl.texcoords[i].components <= 3);
vs->texcoord_elem_count |= decl.texcoords[i].components << (i * 2);
}
}
out.vertex_format = nullptr;
if (out.rasterization_state.primitive == PrimitiveType::Points)
vs->vs_expand = VSExpand::Point;
else
vs->vs_expand = VSExpand::Line;
PrimitiveType prim = g_backend_info.bSupportsPrimitiveRestart ? PrimitiveType::TriangleStrip :
PrimitiveType::Triangles;
out.rasterization_state.primitive = prim;
out.gs_uid.GetUidData()->primitive_type = static_cast<u32>(prim);
}
return out;
}
std::size_t PipelineToHash(const GXPipelineUid& in)
{
XXH3_state_t pipeline_hash_state;
XXH3_INITSTATE(&pipeline_hash_state);
XXH3_64bits_reset_withSeed(&pipeline_hash_state, static_cast<XXH64_hash_t>(1));
UpdateHashWithPipeline(in, &pipeline_hash_state);
return XXH3_64bits_digest(&pipeline_hash_state);
}
void UpdateHashWithPipeline(const GXPipelineUid& in, XXH3_state_t* hash_state)
{
XXH3_64bits_update(hash_state, &in.vertex_format->GetVertexDeclaration(),
sizeof(PortableVertexDeclaration));
XXH3_64bits_update(hash_state, &in.blending_state, sizeof(BlendingState));
XXH3_64bits_update(hash_state, &in.depth_state, sizeof(DepthState));
XXH3_64bits_update(hash_state, &in.rasterization_state, sizeof(RasterizationState));
XXH3_64bits_update(hash_state, &in.gs_uid, sizeof(GeometryShaderUid));
XXH3_64bits_update(hash_state, &in.ps_uid, sizeof(PixelShaderUid));
XXH3_64bits_update(hash_state, &in.vs_uid, sizeof(VertexShaderUid));
}
} // namespace VideoCommon
|
