-
-
Notifications
You must be signed in to change notification settings - Fork 3.1k
Expand file tree
/
Copy pathgpu.zig
More file actions
128 lines (121 loc) · 4.8 KB
/
Copy pathgpu.zig
File metadata and controls
128 lines (121 loc) · 4.8 KB
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
const std = @import("std.zig");
pub const position_in = @extern(*addrspace(.input) @Vector(4, f32), .{ .name = "position" });
pub const position_out = @extern(*addrspace(.output) @Vector(4, f32), .{ .name = "position" });
pub const point_size_in = @extern(*addrspace(.input) f32, .{ .name = "point_size" });
pub const point_size_out = @extern(*addrspace(.output) f32, .{ .name = "point_size" });
pub extern const invocation_id: u32 addrspace(.input);
pub extern const frag_coord: @Vector(4, f32) addrspace(.input);
pub extern const point_coord: @Vector(2, f32) addrspace(.input);
// TODO: direct/indirect values
// pub extern const front_facing: bool addrspace(.input);
// TODO: runtime array
// pub extern const sample_mask;
pub extern var frag_depth: f32 addrspace(.output);
pub extern const num_workgroups: @Vector(3, u32) addrspace(.input);
pub extern const workgroup_size: @Vector(3, u32) addrspace(.input);
pub extern const workgroup_id: @Vector(3, u32) addrspace(.input);
pub extern const local_invocation_id: @Vector(3, u32) addrspace(.input);
pub extern const global_invocation_id: @Vector(3, u32) addrspace(.input);
pub extern const vertex_index: u32 addrspace(.input);
pub extern const instance_index: u32 addrspace(.input);
/// Forms the main linkage for `input` and `output` address spaces.
/// `ptr` must be a reference to variable or struct field.
pub fn location(comptime ptr: anytype, comptime loc: u32) void {
asm volatile (
\\OpDecorate %ptr Location $loc
:
: [ptr] "" (ptr),
[loc] "c" (loc),
);
}
/// Forms the main linkage for `input` and `output` address spaces.
/// `ptr` must be a reference to variable or struct field.
pub fn binding(comptime ptr: anytype, comptime set: u32, comptime bind: u32) void {
asm volatile (
\\OpDecorate %ptr DescriptorSet $set
\\OpDecorate %ptr Binding $bind
:
: [ptr] "" (ptr),
[set] "c" (set),
[bind] "c" (bind),
);
}
pub const ExecutionMode = union(Tag) {
/// Sets origin of the framebuffer to the upper-left corner
origin_upper_left,
/// Sets origin of the framebuffer to the lower-left corner
origin_lower_left,
/// Indicates that the fragment shader writes to `frag_depth`,
/// replacing the fixed-function depth value.
depth_replacing,
/// Indicates that per-fragment tests may assume that
/// any `frag_depth` built in-decorated value written by the shader is
/// greater-than-or-equal to the fragment’s interpolated depth value
depth_greater,
/// Indicates that per-fragment tests may assume that
/// any `frag_depth` built in-decorated value written by the shader is
/// less-than-or-equal to the fragment’s interpolated depth value
depth_less,
/// Indicates that per-fragment tests may assume that
/// any `frag_depth` built in-decorated value written by the shader is
/// the same as the fragment’s interpolated depth value
depth_unchanged,
/// Indicates the workgroup size in the x, y, and z dimensions.
local_size: LocalSize,
pub const Tag = enum(u32) {
origin_upper_left = 7,
origin_lower_left = 8,
depth_replacing = 12,
depth_greater = 14,
depth_less = 15,
depth_unchanged = 16,
local_size = 17,
};
pub const LocalSize = struct { x: u32, y: u32, z: u32 };
};
/// Declare the mode entry point executes in.
pub fn executionMode(comptime entry_point: anytype, comptime mode: ExecutionMode) void {
const cc = @typeInfo(@TypeOf(entry_point)).@"fn".calling_convention;
switch (mode) {
.origin_upper_left,
.origin_lower_left,
.depth_replacing,
.depth_greater,
.depth_less,
.depth_unchanged,
=> {
if (cc != .spirv_fragment) {
@compileError(
\\invalid execution mode '
++ @tagName(mode) ++
\\' for function with '
++ @tagName(cc) ++
\\' calling convention
);
}
asm volatile (
\\OpExecutionMode %entry_point $mode
:
: [entry_point] "" (entry_point),
[mode] "c" (@intFromEnum(mode)),
);
},
.local_size => |size| {
if (cc != .spirv_kernel) {
@compileError(
\\invalid execution mode 'local_size' for function with '
++ @tagName(cc) ++
\\' calling convention
);
}
asm volatile (
\\OpExecutionMode %entry_point LocalSize $x $y $z
:
: [entry_point] "" (entry_point),
[x] "c" (size.x),
[y] "c" (size.y),
[z] "c" (size.z),
);
},
}
}