From 856c98c4c197ca8fd999da05617a8b538fdf2d42 Mon Sep 17 00:00:00 2001
From: Stephen Gutekanst <stephen@hexops.com>
Date: Tue, 15 Mar 2022 21:14:57 -0700
Subject: [PATCH] gpu: implement Texture.createView

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
---
 gpu/src/NativeInstance.zig | 19 +++++++++++++++++++
 gpu/src/Texture.zig        |  7 +++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/gpu/src/NativeInstance.zig b/gpu/src/NativeInstance.zig
index bebfedb1..df81751b 100644
--- a/gpu/src/NativeInstance.zig
+++ b/gpu/src/NativeInstance.zig
@@ -786,6 +786,25 @@ const texture_vtable = Texture.VTable{
             c.wgpuTextureDestroy(@ptrCast(c.WGPUTexture, ptr));
         }
     }).destroy,
+    .createView = (struct {
+        pub fn createView(ptr: *anyopaque, descriptor: *const TextureView.Descriptor) TextureView {
+            const desc = c.WGPUTextureViewDescriptor{
+                .nextInChain = null,
+                .label = if (descriptor.label) |l| l else "",
+                .format = @enumToInt(descriptor.format),
+                .dimension = @enumToInt(descriptor.dimension),
+                .baseMipLevel = descriptor.base_mip_level,
+                .mipLevelCount = descriptor.mip_level_count,
+                .baseArrayLayer = descriptor.base_array_layer,
+                .arrayLayerCount = descriptor.array_layer_count,
+                .aspect = @enumToInt(descriptor.aspect),
+            };
+            return wrapTextureView(c.wgpuTextureCreateView(
+                @ptrCast(c.WGPUTexture, ptr),
+                &desc,
+            ));
+        }
+    }).createView,
 };
 
 fn wrapSampler(sampler: c.WGPUSampler) Sampler {
diff --git a/gpu/src/Texture.zig b/gpu/src/Texture.zig
index 3663549b..b010102c 100644
--- a/gpu/src/Texture.zig
+++ b/gpu/src/Texture.zig
@@ -12,10 +12,9 @@ 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);
     destroy: fn (ptr: *anyopaque) void,
     setLabel: fn (ptr: *anyopaque, label: [:0]const u8) void,
+    createView: fn (ptr: *anyopaque, descriptor: *const TextureView.Descriptor) TextureView,
 };
 
 pub inline fn reference(texture: Texture) void {
@@ -34,6 +33,10 @@ pub inline fn destroy(texture: Texture) void {
     texture.vtable.destroy(texture.ptr);
 }
 
+pub inline fn createView(texture: Texture, descriptor: *const TextureView.Descriptor) TextureView {
+    return texture.vtable.createView(texture.ptr, descriptor);
+}
+
 pub const Descriptor = struct {
     label: ?[*:0]const u8 = null,
     usage: Usage,