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gpu: add VertexState.init slice helper

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-08-16 19:02:51 -07:00
parent 8cd2fb3f19
commit 772eb9b89d
2 changed files with 22 additions and 4 deletions
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1
gpu/README.md
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@ -178,6 +178,7 @@ And, to initialize data structures with slices in them, the following helpers ar
* `RenderPassDescriptor.init`
* `ProgrammableStageDescriptor.init`
* `VertexBufferLayout.init`
* `VertexState.init`
### Typed callbacks

25
gpu/src/types.zig
View file

@ -669,7 +669,7 @@ pub const ProgrammableStageDescriptor = extern struct {
.next_in_chain = v.next_in_chain,
.module = v.module,
.entry_point = v.entry_point,
.constant_count = if (v.timestamp_writes) |e| @intCast(u32, e.len) else 0,
.constant_count = if (v.constants) |e| @intCast(u32, e.len) else 0,
.constants = if (v.constants) |e| e.ptr else null,
};
}
@ -711,7 +711,7 @@ pub const VertexBufferLayout = extern struct {
array_stride: u64,
step_mode: VertexStepMode = .vertex,
attributes: ?[]const VertexAttribute = null,
}) ProgrammableStageDescriptor {
}) VertexBufferLayout {
return .{
.array_stride = v.array_stride,
.step_mode = v.step_mode,
@ -732,12 +732,29 @@ pub const VertexState = extern struct {
next_in_chain: ?*const ChainedStruct = null,
module: *ShaderModule,
entry_point: [*:0]const u8,
// TODO: slice helper
constant_count: u32 = 0,
constants: ?[*]const ConstantEntry = null,
// TODO: slice helper
buffer_count: u32 = 0,
buffers: ?[*]const VertexBufferLayout = null,
/// Provides a slightly friendlier Zig API to initialize this structure.
pub inline fn init(v: struct {
next_in_chain: ?*const ChainedStruct = null,
module: *ShaderModule,
entry_point: [*:0]const u8,
constants: ?[]const ConstantEntry = null,
buffers: ?[]const VertexBufferLayout = null,
}) VertexState {
return .{
.next_in_chain = v.next_in_chain,
.module = v.module,
.entry_point = v.entry_point,
.constant_count = if (v.constants) |e| @intCast(u32, e.len) else 0,
.constants = if (v.constants) |e| e.ptr else null,
.buffer_count = if (v.buffers) |e| @intCast(u32, e.len) else 0,
.buffers = if (v.buffers) |e| e.ptr else null,
};
}
};
pub const FragmentState = extern struct {