gpu: add constants

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

gpu/src/TODO

@@ -1,26 +1,3 @@
-#define WGPU_ARRAY_LAYER_COUNT_UNDEFINED (0xffffffffUL)
-#define WGPU_COPY_STRIDE_UNDEFINED (0xffffffffUL)
-#define WGPU_LIMIT_U32_UNDEFINED (0xffffffffUL)
-#define WGPU_LIMIT_U64_UNDEFINED (0xffffffffffffffffULL)
-#define WGPU_MIP_LEVEL_COUNT_UNDEFINED (0xffffffffUL)
-#define WGPU_STRIDE_UNDEFINED (0xffffffffUL)
-#define WGPU_WHOLE_MAP_SIZE SIZE_MAX
-#define WGPU_WHOLE_SIZE (0xffffffffffffffffULL)
-
-typedef uint32_t WGPUFlags;
-
-typedef struct WGPUChainedStruct {
-    struct WGPUChainedStruct const * next;
-    WGPUSType sType;
-} WGPUChainedStruct;
-
-typedef struct WGPUChainedStructOut {
-    struct WGPUChainedStructOut * next;
-    WGPUSType sType;
-} WGPUChainedStructOut;
-
-
-
 // TODO: Dawn specific
 typedef struct WGPUDawnCacheDeviceDescriptor {
     WGPUChainedStruct chain;

gpu/src/main.zig

@@ -142,6 +142,16 @@ pub const ColorWriteMask = @import("enums.zig").ColorWriteMask;
 pub const MapMode = @import("enums.zig").MapMode;
 pub const ShaderStage = @import("enums.zig").ShaderStage;
 
+// Constants
+const array_layer_count_undefined: u32 = 0xffffffff;
+const copy_stride_undefined: u32 = 0xffffffff;
+const limit_u32_undefined: u32 = 0xffffffff;
+const limit_u64_undefined: u32 = 0xffffffffffffffff;
+const mip_level_count_undefined: u32 = 0xffffffff;
+const stride_undefined: u32 = 0xffffffff;
+const whole_map_size: u32 = std.math.maxInt(c_int);
+const whole_size: u64 = 0xffffffffffffffff;
+
 test "syntax" {
     // Root interface/implementations
     _ = Interface;