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vulkan: use specialization constants

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This commit is contained in:
Julian Orth 2025-01-30 13:54:37 +01:00
parent 218f8d7ba2
commit cca0af3d0d
7 changed files with 58 additions and 39 deletions
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30
build/vulkan.rs
View file

@ -1,7 +1,7 @@
use {
crate::open,
anyhow::{bail, Context},
shaderc::CompileOptions,
anyhow::{anyhow, bail, Context},
shaderc::{CompileOptions, ResolvedInclude},
std::{io::Write, path::Path},
};
@ -12,21 +12,17 @@ pub fn main() -> anyhow::Result<()> {
compile_simple("fill.frag")?;
compile_simple("fill.vert")?;
compile_simple("tex.vert")?;
compile_tex_frag("tex.frag.spv", false, false)?;
compile_tex_frag("tex.frag.mult+opaque.spv", false, true)?;
compile_tex_frag("tex.frag.mult+alpha.spv", true, true)?;
compile_tex_frag("tex.frag.spv", false)?;
compile_tex_frag("tex.frag.mult.spv", true)?;
Ok(())
}
fn compile_tex_frag(out: &str, alpha: bool, alpha_multiplier: bool) -> anyhow::Result<()> {
fn compile_tex_frag(out: &str, alpha_multiplier: bool) -> anyhow::Result<()> {
let mut opts = CompileOptions::new().unwrap();
if alpha {
opts.add_macro_definition("ALPHA", None);
}
if alpha_multiplier {
opts.add_macro_definition("ALPHA_MULTIPLIER", None);
}
compile_shader("tex.frag", out, Some(&opts)).with_context(|| out.to_string())?;
compile_shader("tex.frag", out, Some(opts)).with_context(|| out.to_string())?;
Ok(())
}
@ -34,7 +30,15 @@ fn compile_simple(name: &str) -> anyhow::Result<()> {
compile_shader(name, &format!("{name}.spv"), None).with_context(|| name.to_string())
}
fn compile_shader(name: &str, out: &str, options: Option<&CompileOptions>) -> anyhow::Result<()> {
fn compile_shader(name: &str, out: &str, options: Option<CompileOptions>) -> anyhow::Result<()> {
let read = |path: &str| std::fs::read_to_string(format!("{}/{}", ROOT, path));
let mut options = options.unwrap_or_else(|| CompileOptions::new().unwrap());
options.set_include_callback(|name, _, _, _| {
Ok(ResolvedInclude {
resolved_name: name.to_string(),
content: read(name).map_err(|e| anyhow!(e).to_string())?,
})
});
let stage = match Path::new(name)
.extension()
.and_then(|e| e.to_str())
@ -44,10 +48,10 @@ fn compile_shader(name: &str, out: &str, options: Option<&CompileOptions>) -> an
"vert" => shaderc::ShaderKind::Vertex,
n => bail!("Unknown shader stage {}", n),
};
let src = std::fs::read_to_string(format!("{}/{}", ROOT, name))?;
let src = read(name)?;
let compiler = shaderc::Compiler::new().unwrap();
let binary = compiler
.compile_into_spirv(&src, stage, name, "main", options)
.compile_into_spirv(&src, stage, name, "main", Some(&options))
.unwrap();
let mut file = open(out)?;
file.write_all(binary.as_binary_u8())?;

16
src/gfx_apis/vulkan/pipeline.rs
View file

@ -18,6 +18,7 @@ use {
PipelineRenderingCreateInfo, PipelineShaderStageCreateInfo,
PipelineVertexInputStateCreateInfo, PipelineViewportStateCreateInfo, PolygonMode,
PrimitiveTopology, PushConstantRange, SampleCountFlags, ShaderStageFlags,
SpecializationInfo, SpecializationMapEntry,
},
},
std::{rc::Rc, slice},
@ -36,7 +37,8 @@ pub(super) struct PipelineCreateInfo {
pub(super) format: vk::Format,
pub(super) vert: Rc<VulkanShader>,
pub(super) frag: Rc<VulkanShader>,
pub(super) alpha: bool,
pub(super) blend: bool,
pub(super) src_has_alpha: bool,
pub(super) frag_descriptor_set_layout: Option<Rc<VulkanDescriptorSetLayout>>,
}
@ -89,6 +91,15 @@ impl VulkanDevice {
};
let destroy_layout =
OnDrop(|| unsafe { self.device.destroy_pipeline_layout(pipeline_layout, None) });
let mut frag_spec_data = ArrayVec::<_, 4>::new();
frag_spec_data.extend((info.src_has_alpha as u32).to_ne_bytes());
let frag_spec_entries = [SpecializationMapEntry::default()
.constant_id(0)
.size(4)
.offset(0)];
let frag_spec = SpecializationInfo::default()
.map_entries(&frag_spec_entries)
.data(&frag_spec_data);
let pipeline = {
let stages = [
PipelineShaderStageCreateInfo::default()
@ -98,6 +109,7 @@ impl VulkanDevice {
PipelineShaderStageCreateInfo::default()
.stage(ShaderStageFlags::FRAGMENT)
.module(info.frag.module)
.specialization_info(&frag_spec)
.name(c"main"),
];
let input_assembly_state = PipelineInputAssemblyStateCreateInfo::default()
@ -113,7 +125,7 @@ impl VulkanDevice {
.rasterization_samples(SampleCountFlags::TYPE_1);
let mut blending = PipelineColorBlendAttachmentState::default()
.color_write_mask(ColorComponentFlags::RGBA);
if info.alpha {
if info.blend {
blending = blending
.blend_enable(true)
.src_color_blend_factor(BlendFactor::ONE)

32
src/gfx_apis/vulkan/renderer.rs
View file

@ -18,8 +18,8 @@ use {
semaphore::VulkanSemaphore,
shaders::{
FillFragPushConstants, FillVertPushConstants, TexFragPushConstants,
TexVertPushConstants, VulkanShader, FILL_FRAG, FILL_VERT, TEX_FRAG,
TEX_FRAG_MULT_ALPHA, TEX_FRAG_MULT_OPAQUE, TEX_VERT,
TexVertPushConstants, VulkanShader, FILL_FRAG, FILL_VERT, TEX_FRAG, TEX_FRAG_MULT,
TEX_VERT,
},
VulkanError,
},
@ -74,8 +74,7 @@ pub struct VulkanRenderer {
pub(super) fill_frag_shader: Rc<VulkanShader>,
pub(super) tex_vert_shader: Rc<VulkanShader>,
pub(super) tex_frag_shader: Rc<VulkanShader>,
pub(super) tex_frag_mult_opaque_shader: Rc<VulkanShader>,
pub(super) tex_frag_mult_alpha_shader: Rc<VulkanShader>,
pub(super) tex_frag_mult_shader: Rc<VulkanShader>,
pub(super) tex_descriptor_set_layout: Rc<VulkanDescriptorSetLayout>,
pub(super) defunct: Cell<bool>,
pub(super) pending_cpu_jobs: CopyHashMap<u64, PendingJob>,
@ -160,8 +159,7 @@ impl VulkanDevice {
let tex_descriptor_set_layout = self.create_descriptor_set_layout(&sampler)?;
let tex_vert_shader = self.create_shader(TEX_VERT)?;
let tex_frag_shader = self.create_shader(TEX_FRAG)?;
let tex_frag_mult_opaque_shader = self.create_shader(TEX_FRAG_MULT_OPAQUE)?;
let tex_frag_mult_alpha_shader = self.create_shader(TEX_FRAG_MULT_ALPHA)?;
let tex_frag_mult_shader = self.create_shader(TEX_FRAG_MULT)?;
let gfx_command_buffers = self.create_command_pool(self.graphics_queue_idx)?;
let transfer_command_buffers = self
.distinct_transfer_queue_family_idx
@ -219,8 +217,7 @@ impl VulkanDevice {
fill_frag_shader,
tex_vert_shader,
tex_frag_shader,
tex_frag_mult_opaque_shader,
tex_frag_mult_alpha_shader,
tex_frag_mult_shader,
tex_descriptor_set_layout,
defunct: Cell::new(false),
pending_cpu_jobs: Default::default(),
@ -246,34 +243,37 @@ impl VulkanRenderer {
format,
vert: self.fill_vert_shader.clone(),
frag: self.fill_frag_shader.clone(),
alpha: true,
blend: true,
src_has_alpha: true,
frag_descriptor_set_layout: None,
},
)?;
let create_tex_pipeline = |alpha| {
let create_tex_pipeline = |src_has_alpha| {
self.device
.create_pipeline::<TexVertPushConstants, ()>(PipelineCreateInfo {
format,
vert: self.tex_vert_shader.clone(),
frag: self.tex_frag_shader.clone(),
alpha,
blend: src_has_alpha,
src_has_alpha,
frag_descriptor_set_layout: Some(self.tex_descriptor_set_layout.clone()),
})
};
let create_tex_mult_pipeline = |frag: &Rc<VulkanShader>| {
let create_tex_mult_pipeline = |src_has_alpha: bool| {
self.device
.create_pipeline::<TexVertPushConstants, TexFragPushConstants>(PipelineCreateInfo {
format,
vert: self.tex_vert_shader.clone(),
frag: frag.clone(),
alpha: true,
frag: self.tex_frag_mult_shader.clone(),
blend: true,
src_has_alpha,
frag_descriptor_set_layout: Some(self.tex_descriptor_set_layout.clone()),
})
};
let tex_opaque = create_tex_pipeline(false)?;
let tex_alpha = create_tex_pipeline(true)?;
let tex_mult_opaque = create_tex_mult_pipeline(&self.tex_frag_mult_opaque_shader)?;
let tex_mult_alpha = create_tex_mult_pipeline(&self.tex_frag_mult_alpha_shader)?;
let tex_mult_opaque = create_tex_mult_pipeline(false)?;
let tex_mult_alpha = create_tex_mult_pipeline(true)?;
let pipelines = Rc::new(VulkanFormatPipelines {
fill,
tex: static_map! {

5
src/gfx_apis/vulkan/shaders.rs
View file

@ -9,10 +9,7 @@ pub const FILL_VERT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/fill.vert
pub const FILL_FRAG: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/fill.frag.spv"));
pub const TEX_VERT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/tex.vert.spv"));
pub const TEX_FRAG: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/tex.frag.spv"));
pub const TEX_FRAG_MULT_OPAQUE: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/tex.frag.mult+opaque.spv"));
pub const TEX_FRAG_MULT_ALPHA: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/tex.frag.mult+alpha.spv"));
pub const TEX_FRAG_MULT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/tex.frag.mult.spv"));
pub struct VulkanShader {
pub(super) device: Rc<VulkanDevice>,

2
src/gfx_apis/vulkan/shaders/fill.frag
View file

@ -1,5 +1,7 @@
#version 450
#include "frag_spec_const.glsl"
layout(push_constant, std430) uniform Data {
layout(offset = 32) vec4 color;
} data;

1
src/gfx_apis/vulkan/shaders/frag_spec_const.glsl Normal file
View file

@ -0,0 +1 @@
layout(constant_id = 0) const bool src_has_alpha = false;

11
src/gfx_apis/vulkan/shaders/tex.frag
View file

@ -1,5 +1,7 @@
#version 450
#include "frag_spec_const.glsl"
#ifdef ALPHA_MULTIPLIER
layout(push_constant, std430) uniform Data {
layout(offset = 64) float mul;
@ -11,10 +13,11 @@ layout(location = 0) out vec4 out_color;
void main() {
#ifdef ALPHA_MULTIPLIER
#ifdef ALPHA
out_color = textureLod(tex, tex_pos, 0) * data.mul;
#endif // !ALPHA
out_color = vec4(textureLod(tex, tex_pos, 0).rgb * data.mul, data.mul);
if (src_has_alpha) {
out_color = textureLod(tex, tex_pos, 0) * data.mul;
} else {
out_color = vec4(textureLod(tex, tex_pos, 0).rgb * data.mul, data.mul);
}
#else // !ALPHA_MULTIPLIER
out_color = textureLod(tex, tex_pos, 0);
#endif