gpu: implement Texture

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

gpu/src/NativeInstance.zig

@@ -21,6 +21,7 @@ const CommandBuffer = @import("CommandBuffer.zig");
 const ShaderModule = @import("ShaderModule.zig");
 const SwapChain = @import("SwapChain.zig");
 const TextureView = @import("TextureView.zig");
+const Texture = @import("Texture.zig");
 
 const TextureUsage = @import("enums.zig").TextureUsage;
 const TextureFormat = @import("enums.zig").TextureFormat;
@@ -518,6 +519,26 @@ const texture_view_vtable = TextureView.VTable{
     }).release,
 };
 
+fn wrapTexture(texture: c.WGPUTexture) Texture {
+    return .{
+        .ptr = texture.?,
+        .vtable = &texture_vtable,
+    };
+}
+
+const texture_vtable = Texture.VTable{
+    .reference = (struct {
+        pub fn reference(ptr: *anyopaque) void {
+            c.wgpuTextureReference(@ptrCast(c.WGPUTexture, ptr));
+        }
+    }).reference,
+    .release = (struct {
+        pub fn release(ptr: *anyopaque) void {
+            c.wgpuTextureRelease(@ptrCast(c.WGPUTexture, ptr));
+        }
+    }).release,
+};
+
 test "syntax" {
     _ = wrap;
     _ = interface_vtable;
@@ -532,4 +553,5 @@ test "syntax" {
     _ = wrapShaderModule;
     _ = wrapSwapChain;
     _ = wrapTextureView;
+    _ = wrapTexture;
 }

gpu/src/TODO

@@ -668,13 +668,6 @@ WGPU_EXPORT void wgpuSamplerSetLabel(WGPUSampler sampler, char const * label);
 WGPU_EXPORT void wgpuSamplerReference(WGPUSampler sampler);
 WGPU_EXPORT void wgpuSamplerRelease(WGPUSampler sampler);
 
-// Methods of Texture
-WGPU_EXPORT WGPUTextureView wgpuTextureCreateView(WGPUTexture texture, WGPUTextureViewDescriptor const * descriptor);
-WGPU_EXPORT void wgpuTextureDestroy(WGPUTexture texture);
-WGPU_EXPORT void wgpuTextureSetLabel(WGPUTexture texture, char const * label);
-WGPU_EXPORT void wgpuTextureReference(WGPUTexture texture);
-WGPU_EXPORT void wgpuTextureRelease(WGPUTexture texture);
-
 typedef enum WGPUSType {
     // webgpu.h upstream:
     WGPUSType_Invalid = 0x00000000,

gpu/src/Texture.zig

@@ -0,0 +1,23 @@
+const Texture = @This();
+
+/// The type erased pointer to the Texture implementation
+/// Equal to c.WGPUTexture for NativeInstance.
+ptr: *anyopaque,
+vtable: *const VTable,
+
+pub const VTable = struct {
+    reference: fn (ptr: *anyopaque) void,
+    release: fn (ptr: *anyopaque) void,
+    // TODO:
+    // WGPU_EXPORT WGPUTextureView wgpuTextureCreateView(WGPUTexture texture, WGPUTextureViewDescriptor const * descriptor);
+    // WGPU_EXPORT void wgpuTextureDestroy(WGPUTexture texture);
+    // WGPU_EXPORT void wgpuTextureSetLabel(WGPUTexture texture, char const * label);
+};
+
+pub inline fn reference(texture: Texture) void {
+    texture.vtable.reference(texture.ptr);
+}
+
+pub inline fn release(texture: Texture) void {
+    texture.vtable.release(texture.ptr);
+}

gpu/src/main.zig

@@ -36,6 +36,7 @@ pub const CommandBuffer = @import("CommandBuffer.zig");
 pub const ShaderModule = @import("ShaderModule.zig");
 pub const SwapChain = @import("SwapChain.zig");
 pub const TextureView = @import("TextureView.zig");
+pub const Texture = @import("Texture.zig");
 
 pub const Feature = @import("enums.zig").Feature;
 pub const TextureUsage = @import("enums.zig").TextureUsage;
@@ -96,6 +97,7 @@ test "syntax" {
     _ = ShaderModule;
     _ = SwapChain;
     _ = TextureView;
+    _ = Texture;
 
     _ = Feature;
 }