Merge pull request #5 from grovesNL/resource

Add resource and binding model types

src/binding_model.rs

@@ -1,6 +1,76 @@
 use hal;
 
+use {BindGroupLayoutHandle, BufferHandle, SamplerHandle, TextureViewHandle};
+
+bitflags! {
+    #[repr(transparent)]
+    pub struct ShaderStageFlags: u32 {
+        const NONE = 0;
+        const VERTEX = 1;
+        const FRAGMENT = 2;
+        const COMPUTE = 4;
+    }
+}
+
+#[repr(C)]
+pub enum BindingType {    
+    UniformBuffer = 0,
+    Sampler = 1,
+    SampledTexture = 2,
+    StorageBuffer = 3,
+}
+
+#[repr(C)]
+pub struct BindGroupLayoutBinding {
+    pub binding: u32,
+    pub visibility: ShaderStageFlags,
+    pub ty: BindingType,
+}
+
+#[repr(C)]
+pub struct BindGroupLayoutDescriptor<'a> {
+    pub bindings: &'a [BindGroupLayoutBinding],
+}
+
+pub struct BindGroupLayout {
+    // TODO
+}
+
+#[repr(C)]
+pub struct PipelineLayoutDescriptor<'a> {
+    pub bind_group_layouts: &'a [BindGroupLayoutHandle],
+}
 
 pub struct PipelineLayout<B: hal::Backend> {
     raw: B::PipelineLayout,
 }
+
+#[repr(C)]
+pub struct BufferBinding {
+    pub buffer: BufferHandle,
+    pub offset: u32,
+    pub size: u32,
+}
+
+#[repr(C)]
+pub enum BindingResource {
+    Buffer(BufferBinding),
+    Sampler(SamplerHandle),
+    TextureView(TextureViewHandle),
+}
+
+#[repr(C)]
+pub struct Binding {
+    pub binding: u32,
+    pub resource: BindingResource,
+}
+
+#[repr(C)]
+pub struct BindGroupDescriptor<'a> {
+    pub layout: BindGroupLayout,
+    pub bindings: &'a [Binding],
+}
+
+pub struct BindGroup {
+    // TODO
+}

src/command/mod.rs

@@ -6,13 +6,70 @@ pub use self::render::*;
 
 use hal;
 
-use {CommandBufferHandle, ComputePassHandle, RenderPassHandle};
+use {BufferHandle, Color, CommandBufferHandle, ComputePassHandle, Origin3d,
+    RenderPassHandle, TextureViewHandle, TextureHandle};
 
 
+#[repr(C)]
+pub enum LoadOp {
+    Clear = 0,
+    Load = 1,
+}
+
+#[repr(C)]
+pub enum StoreOp {
+    Store = 0,
+}
+
+#[repr(C)]
+pub struct RenderPassColorAttachmentDescriptor {
+    pub attachment: TextureViewHandle,
+    pub load_op: LoadOp,
+    pub store_op: StoreOp,
+    pub clear_color: Color,
+}
+
+#[repr(C)]
+pub struct RenderPassDepthStencilAttachmentDescriptor {
+    pub attachment: TextureViewHandle,
+    pub depth_load_op: LoadOp,
+    pub depth_store_op: StoreOp,
+    pub clear_depth: f32,
+    pub stencil_load_op: LoadOp,
+    pub stencil_store_op: StoreOp,
+    pub clear_stencil: u32,
+}
+
+#[repr(C)]
+pub struct RenderPassDescriptor<'a> {
+    pub color_attachments: &'a [RenderPassColorAttachmentDescriptor],
+    pub depth_stencil_attachment: RenderPassDepthStencilAttachmentDescriptor,
+}
+
+#[repr(C)]
+pub struct BufferCopyView {
+    pub buffer: BufferHandle,
+    pub offset: u32,
+    pub row_pitch: u32,
+    pub image_height: u32,
+}
+
+#[repr(C)]
+pub struct TextureCopyView {
+    pub texture: TextureHandle,
+    pub level: u32,
+    pub slice: u32,
+    pub origin: Origin3d,
+    //TODO: pub aspect: TextureAspect,
+}
+
 pub struct CommandBuffer<B: hal::Backend> {
     raw: B::CommandBuffer,
 }
 
+#[repr(C)]
+pub struct CommandBufferDescriptor;
+
 pub extern "C"
 fn command_buffer_begin_render_pass(
     command_buffer: CommandBufferHandle

src/conv.rs

@@ -0,0 +1,40 @@
+use hal;
+
+use resource;
+
+
+pub(crate) fn map_buffer_usage(usage: resource::BufferUsageFlags) -> (hal::buffer::Usage, hal::memory::Properties) {
+    use resource::BufferUsageFlags as W;
+    use hal::buffer::Usage as U;
+    use hal::memory::Properties as P;
+
+    let mut hal_memory = P::empty();
+    if usage.contains(W::MAP_READ) {
+        hal_memory |= P::CPU_VISIBLE | P::CPU_CACHED;
+    }
+    if usage.contains(W::MAP_WRITE) {
+        hal_memory |= P::CPU_VISIBLE;
+    }
+
+    let mut hal_usage = U::empty();
+    if usage.contains(W::TRANSFER_SRC) {
+        hal_usage |= U::TRANSFER_SRC;
+    }
+    if usage.contains(W::TRANSFER_DST) {
+        hal_usage |= U::TRANSFER_DST;
+    }
+    if usage.contains(W::INDEX) {
+        hal_usage |= U::INDEX;
+    }
+    if usage.contains(W::VERTEX) {
+        hal_usage |= U::VERTEX;
+    }
+    if usage.contains(W::UNIFORM) {
+        hal_usage |= U::UNIFORM;
+    }
+    if usage.contains(W::STORAGE) {
+        hal_usage |= U::STORAGE;
+    }
+
+    (hal_usage, hal_memory)
+}

src/device.rs

@@ -1,17 +1,9 @@
 use hal::{self, Device as _Device, QueueGroup};
-use {memory, pipeline};
+use {conv, memory, pipeline, resource};
 
 use {BufferHandle, CommandBufferHandle, DeviceHandle, ShaderModuleHandle};
 
 
-pub type BufferUsage = hal::buffer::Usage;
-
-#[repr(C)]
-pub struct BufferDescriptor {
-    pub size: u64,
-    pub usage: BufferUsage,
-}
-
 #[repr(C)]
 pub struct CommandBufferDescriptor {
 }
@@ -36,17 +28,15 @@ impl<B: hal::Backend> Device<B> {
     }
 }
 
-pub struct Buffer<B: hal::Backend> {
-    pub raw: B::UnboundBuffer,
-}
-
 pub extern "C"
 fn device_create_buffer(
-    device: DeviceHandle, desc: BufferDescriptor
+    device: DeviceHandle, desc: resource::BufferDescriptor
 ) -> BufferHandle {
-    let buffer = device.device.create_buffer(desc.size, desc.usage).unwrap();
-    BufferHandle::new(Buffer {
+    let (usage, memory_properties) = conv::map_buffer_usage(desc.usage);
+    let buffer = device.device.create_buffer(desc.size as u64, usage).unwrap();
+    BufferHandle::new(resource::Buffer {
         raw: buffer,
+        memory_properties,
     })
 }
 

src/lib.rs

@@ -13,6 +13,7 @@ extern crate gfx_hal as hal;
 extern crate gfx_memory as memory;
 
 mod binding_model;
+mod conv;
 mod command;
 mod device;
 mod handle;
@@ -30,12 +31,40 @@ pub use self::resource::*;
 use back::Backend as B;
 use handle::Handle;
 
+#[repr(C)]
+pub struct Color {
+    pub r: f32,
+    pub g: f32,
+    pub b: f32,
+    pub a: f32,
+}
+
+#[repr(C)]
+pub struct Origin3d {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
+}
+
+#[repr(C)]
+pub struct Extent3d {
+    pub width: f32,
+    pub height: f32,
+    pub depth: f32,
+}
+
 pub type InstanceHandle = Handle<back::Instance>;
 pub type AdapterHandle = Handle<hal::Adapter<B>>;
 pub type DeviceHandle = Handle<Device<B>>;
 pub type BufferHandle = Handle<Buffer<B>>;
 
+// Resource
+pub type TextureViewHandle = Handle<TextureView>;
+pub type TextureHandle = Handle<Texture>;
+pub type SamplerHandle = Handle<Sampler>;
+
 // Binding model
+pub type BindGroupLayoutHandle = Handle<BindGroupLayout>;
 pub type PipelineLayoutHandle = Handle<PipelineLayout<B>>;
 
 // Pipeline

src/pipeline.rs

@@ -33,12 +33,12 @@ pub enum BlendOperation {
 bitflags! {
     #[repr(transparent)]
     pub struct ColorWriteFlags: u32 {
-        const NONE = 0x0;
-        const RED = 0x1;
-        const GREEN = 0x2;
-        const BLUE = 0x4;
-        const ALPHA = 0x8;
-        const ALL = 0x15;
+        const NONE = 0;
+        const RED = 1;
+        const GREEN = 2;
+        const BLUE = 4;
+        const ALPHA = 8;
+        const ALL = 15;
     }
 }
 

src/resource.rs

@@ -1,3 +1,46 @@
+use hal;
+
+use {Extent3d};
+
+
+bitflags! {
+    #[repr(transparent)]
+    pub struct BufferUsageFlags: u32 {
+        const NONE = 0;
+        const MAP_READ = 1;
+        const MAP_WRITE = 2;
+        const TRANSFER_SRC = 4;
+        const TRANSFER_DST = 8;
+        const INDEX = 16;
+        const VERTEX = 32;
+        const UNIFORM = 64;
+        const STORAGE = 128;
+    }
+}
+
+#[repr(C)]
+pub struct BufferDescriptor {
+    pub size: u32,
+    pub usage: BufferUsageFlags,
+}
+
+pub struct Buffer<B: hal::Backend> {
+    pub(crate) raw: B::UnboundBuffer,
+    pub(crate) memory_properties: hal::memory::Properties,
+    // TODO: mapping, unmap()
+}
+
+pub struct TextureView {
+    // TODO
+}
+
+#[repr(C)]
+pub enum TextureDimension {
+    D1,
+    D2,
+    D3,
+}
+
 #[repr(C)]
 pub enum TextureFormat {
     R8g8b8a8Unorm = 0,
@@ -6,6 +49,46 @@ pub enum TextureFormat {
     D32FloatS8Uint = 3,
 }
 
+bitflags! {
+    #[repr(transparent)]
+    pub struct TextureUsageFlags: u32 {
+        const NONE = 0;
+        const TRANSFER_SRC = 1;
+        const TRANSFER_DST = 2;
+        const SAMPLED = 4;
+        const STORAGE = 8;
+        const OUTPUT_ATTACHMENT = 16;
+        const PRESENT = 32;
+    }
+}
+
+#[repr(C)]
+pub struct TextureDescriptor {
+    pub size: Extent3d,
+    pub array_size: u32,
+    pub dimension: TextureDimension,
+    pub format: TextureFormat,
+    pub usage: TextureUsageFlags,
+}
+
+pub struct Texture {
+    // TODO: create_texture_view()
+}
+
+#[repr(C)]
+pub enum AddressMode {
+    ClampToEdge = 0,
+    Repeat = 1,
+    MirrorRepeat = 2,
+    ClampToBorderColor = 3,
+}
+
+#[repr(C)]
+pub enum FilterMode {
+    Nearest = 0,
+    Linear = 1,
+}
+
 #[repr(C)]
 pub enum CompareFunction {
     Never = 0,
@@ -17,3 +100,29 @@ pub enum CompareFunction {
     GreaterEqual = 6,
     Always = 7,
 }
+
+#[repr(C)]
+pub enum BorderColor {
+    TransparentBlack = 0,
+    OpaqueBlack = 1,
+    OpaqueWhite = 2,
+}
+
+#[repr(C)]
+pub struct SamplerDescriptor {
+    pub r_address_mode: AddressMode,
+    pub s_address_mode: AddressMode,
+    pub t_address_mode: AddressMode,
+    pub mag_filter: FilterMode,
+    pub min_filter: FilterMode,
+    pub mipmap_filer: FilterMode,
+    pub lod_min_clamp: f32,
+    pub lod_max_clamp: f32,
+    pub max_anisotropy: u32,
+    pub compare_function: CompareFunction,
+    pub border_color: BorderColor,
+}
+
+pub struct Sampler {
+    // TODO
+}