gpu: convert Texture from enum(usize) to *opaque

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu/src/bind_group_layout.zig

@@ -5,6 +5,7 @@ const BufferBindingLayout = @import("buffer.zig").BufferBindingLayout;
 const Sampler = @import("sampler.zig").Sampler;
 const SamplerBindingLayout = @import("sampler.zig").SamplerBindingLayout;
 const Texture = @import("texture.zig").Texture;
+const TextureBindingLayout = @import("texture.zig").TextureBindingLayout;
 const StorageTextureBindingLayout = @import("types.zig").StorageTextureBindingLayout;
 
 pub const BindGroupLayout = *opaque {};
@@ -15,7 +16,7 @@ pub const BindGroupLayoutEntry = extern struct {
     visibility: ShaderStageFlags,
     buffer: BufferBindingLayout,
     sampler: SamplerBindingLayout,
-    texture: Texture.BindingLayout,
+    texture: TextureBindingLayout,
     storage_texture: StorageTextureBindingLayout,
 };
 

gpu/src/dawn.zig

@@ -1,5 +1,6 @@
 const ChainedStruct = @import("types.zig").ChainedStruct;
 const Texture = @import("texture.zig").Texture;
+const TextureUsageFlags = @import("texture.zig").TextureUsageFlags;
 
 pub const CacheDeviceDescriptor = extern struct {
     // TODO: file an issue on Dawn: why not named nextInChain?
@@ -21,7 +22,7 @@ pub const InstanceDescriptor = extern struct {
 
 pub const TextureInternalUsageDescriptor = extern struct {
     chain: ChainedStruct,
-    internal_usage: Texture.UsageFlags,
+    internal_usage: TextureUsageFlags,
 };
 
 pub const TogglesDeviceDescriptor = extern struct {

gpu/src/render_bundle_encoder.zig

@@ -1,5 +1,6 @@
 const ChainedStruct = @import("types.zig").ChainedStruct;
 const Texture = @import("texture.zig").Texture;
+const TextureFormat = @import("texture.zig").TextureFormat;
 
 pub const RenderBundleEncoder = *opaque {};
 
@@ -7,8 +8,8 @@ pub const RenderBundleEncoderDescriptor = extern struct {
     next_in_chain: *const ChainedStruct,
     label: ?[*:0]const u8 = null,
     color_formats_count: u32,
-    color_formats: [*]const Texture.Format,
-    depth_stencil_format: Texture.Format,
+    color_formats: [*]const TextureFormat,
+    depth_stencil_format: TextureFormat,
     sample_count: u32,
     depth_read_only: bool,
     stencil_read_only: bool,

gpu/src/swap_chain.zig

@@ -1,14 +1,16 @@
 const ChainedStruct = @import("types.zig").ChainedStruct;
 const PresentMode = @import("types.zig").PresentMode;
 const Texture = @import("texture.zig").Texture;
+const TextureUsageFlags = @import("texture.zig").TextureUsageFlags;
+const TextureFormat = @import("texture.zig").TextureFormat;
 
 pub const SwapChain = *opaque {};
 
 pub const SwapChainDescriptor = extern struct {
     next_in_chain: *const ChainedStruct,
     label: ?[*:0]const u8 = null,
-    usage: Texture.UsageFlags,
-    format: Texture.Format,
+    usage: TextureUsageFlags,
+    format: TextureFormat,
     width: u32,
     height: u32,
     present_mode: PresentMode,

gpu/src/texture.zig

@@ -4,34 +4,30 @@ const TextureView = @import("texture_view.zig").TextureView;
 const TextureViewDimension = @import("texture_view.zig").TextureViewDimension;
 const Extent3D = @import("types.zig").Extent3D;
 
-pub const Texture = enum(usize) {
-    _,
+pub const Texture = *opaque {};
 
-    // TODO: verify there is a use case for nullable value of this type.
-    pub const none: Texture = @intToEnum(Texture, 0);
-
-    pub const Aspect = enum(u32) {
+pub const TextureAspect = enum(u32) {
     all = 0x00000000,
     stencil_only = 0x00000001,
     depth_only = 0x00000002,
     plane0_only = 0x00000003,
     plane1_only = 0x00000004,
-    };
+};
 
-    pub const ComponentType = enum(u32) {
+pub const TextureComponentType = enum(u32) {
     float = 0x00000000,
     sint = 0x00000001,
     uint = 0x00000002,
     depth_comparison = 0x00000003,
-    };
+};
 
-    pub const Dimension = enum(u32) {
+pub const TextureDimension = enum(u32) {
     dimension_1d = 0x00000000,
     dimension_2d = 0x00000001,
     dimension_3d = 0x00000002,
-    };
+};
 
-    pub const Format = enum(u32) {
+pub const TextureFormat = enum(u32) {
     undef = 0x00000000,
     r8_unorm = 0x00000001,
     r8_snorm = 0x00000002,
@@ -128,18 +124,18 @@ pub const Texture = enum(usize) {
     astc12x12_unorm = 0x0000005d,
     astc12x12_unorm_srgb = 0x0000005e,
     r8_bg8_biplanar420_unorm = 0x0000005f,
-    };
+};
 
-    pub const SampleType = enum(u32) {
+pub const TextureSampleType = enum(u32) {
     undef = 0x00000000,
     float = 0x00000001,
     unfilterable_float = 0x00000002,
     depth = 0x00000003,
     sint = 0x00000004,
     uint = 0x00000005,
-    };
+};
 
-    pub const UsageFlags = packed struct {
+pub const TextureUsageFlags = packed struct {
     copy_src: bool = false,
     copy_dst: bool = false,
     texture_binding: bool = false,
@@ -156,37 +152,36 @@ pub const Texture = enum(usize) {
         );
     }
 
-        pub const none = UsageFlags{};
+    pub const none = TextureUsageFlags{};
 
-        pub fn equal(a: UsageFlags, b: UsageFlags) bool {
+    pub fn equal(a: TextureUsageFlags, b: TextureUsageFlags) bool {
         return @truncate(u6, @bitCast(u32, a)) == @truncate(u6, @bitCast(u32, b));
     }
-    };
+};
 
-    pub const BindingLayout = extern struct {
+pub const TextureBindingLayout = extern struct {
     next_in_chain: *const ChainedStruct,
-        sample_type: SampleType,
+    sample_type: TextureSampleType,
     view_dimension: TextureViewDimension,
     multisampled: bool,
-    };
+};
 
-    pub const DataLayout = extern struct {
+pub const TextureDataLayout = extern struct {
     next_in_chain: *const ChainedStruct,
     offset: u64,
     bytes_per_row: u32,
     rows_per_image: u32,
-    };
+};
 
-    pub const Descriptor = extern struct {
+pub const TextureDescriptor = extern struct {
     next_in_chain: *const ChainedStruct,
     label: ?[*:0]const u8 = null,
-        usage: UsageFlags,
-        dimension: Dimension,
+    usage: TextureUsageFlags,
+    dimension: TextureDimension,
     size: Extent3D,
-        format: Format,
+    format: TextureFormat,
     mip_level_count: u32,
     sample_count: u32,
     view_format_count: u32,
-        view_formats: [*]const Format,
-    };
+    view_formats: [*]const TextureFormat,
 };

gpu/src/texture_view.zig

@@ -1,5 +1,7 @@
 const ChainedStruct = @import("types.zig").ChainedStruct;
 const Texture = @import("texture.zig").Texture;
+const TextureFormat = @import("texture.zig").TextureFormat;
+const TextureAspect = @import("texture.zig").TextureAspect;
 
 pub const TextureView = *opaque {};
 
@@ -16,11 +18,11 @@ pub const TextureViewDimension = enum(u32) {
 pub const TextureViewDescriptor = extern struct {
     next_in_chain: *const ChainedStruct,
     label: ?[*:0]const u8 = null,
-    format: Texture.Format,
+    format: TextureFormat,
     dimension: TextureViewDimension,
     base_mip_level: u32,
     mip_level_count: u32,
     base_array_layer: u32,
     array_layer_count: u32,
-    aspect: Texture.Aspect,
+    aspect: TextureAspect,
 };

gpu/src/types.zig

@@ -1,6 +1,9 @@
 const std = @import("std");
 const testing = std.testing;
 const Texture = @import("texture.zig").Texture;
+const TextureFormat = @import("texture.zig").TextureFormat;
+const TextureAspect = @import("texture.zig").TextureAspect;
+const TextureDataLayout = @import("texture.zig").TextureDataLayout;
 const TextureView = @import("texture_view.zig").TextureView;
 const TextureViewDimension = @import("texture_view.zig").TextureViewDimension;
 const Buffer = @import("buffer.zig").Buffer;
@@ -502,7 +505,7 @@ pub const StencilFaceState = extern struct {
 pub const StorageTextureBindingLayout = extern struct {
     next_in_chain: *const ChainedStruct,
     access: StorageTextureAccess,
-    format: Texture.Format,
+    format: TextureFormat,
     view_dimension: TextureViewDimension,
 };
 
@@ -525,7 +528,7 @@ pub const CompilationInfo = extern struct {
 
 pub const DepthStencilState = extern struct {
     next_in_chain: *const ChainedStruct,
-    format: Texture.Format,
+    format: TextureFormat,
     depth_write_enabled: bool,
     depth_compare: CompareFunction,
     stencil_front: StencilFaceState,
@@ -539,7 +542,7 @@ pub const DepthStencilState = extern struct {
 
 pub const ImageCopyBuffer = extern struct {
     next_in_chain: *const ChainedStruct,
-    layout: Texture.DataLayout,
+    layout: TextureDataLayout,
     buffer: Buffer,
 };
 
@@ -548,7 +551,7 @@ pub const ImageCopyTexture = extern struct {
     texture: Texture,
     mip_level: u32,
     origin: Origin3D,
-    aspect: Texture.Aspect,
+    aspect: TextureAspect,
 };
 
 pub const ProgrammableStageDescriptor = extern struct {
@@ -587,7 +590,7 @@ pub const VertexBufferLayout = extern struct {
 
 pub const ColorTargetState = extern struct {
     next_in_chain: *const ChainedStruct,
-    format: Texture.Format,
+    format: TextureFormat,
     blend: ?*const BlendState = null,
     write_mask: ColorWriteMaskFlags,
 };