wasm: support more vendor libraries

Adds support for:
- box2d
- cgltf
- stb image
- stb rect pack

vendor/stb/image/stb_image.odin

@@ -7,6 +7,7 @@ LIB :: (
 	     "../lib/stb_image.lib"      when ODIN_OS == .Windows
 	else "../lib/stb_image.a"        when ODIN_OS == .Linux
 	else "../lib/darwin/stb_image.a" when ODIN_OS == .Darwin
+	else "../lib/stb_image_wasm.o"   when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
 	else ""
 )
 
@@ -15,12 +16,19 @@ when LIB != "" {
 		// The STB libraries are shipped with the compiler on Windows so a Windows specific message should not be needed.
 		#panic("Could not find the compiled STB libraries, they can be compiled by running `make -C \"" + ODIN_ROOT + "vendor/stb/src\"`")
 	}
+}
 
+when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
+	foreign import stbi "../lib/stb_image_wasm.o"
+	foreign import stbi { LIB }
+} else when LIB != "" {
 	foreign import stbi { LIB }
 } else {
 	foreign import stbi "system:stb_image"
 }
 
+NO_STDIO :: ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
+
 #assert(size_of(c.int) == size_of(b32))
 #assert(size_of(b32) == size_of(c.int))
 
@@ -33,14 +41,48 @@ Io_Callbacks :: struct {
 	eof:  proc "c" (user: rawptr) -> c.int,                             // returns nonzero if we are at end of file/data
 }
 
+when !NO_STDIO {
+	@(default_calling_convention="c", link_prefix="stbi_")
+	foreign stbi {
+		////////////////////////////////////
+		//
+		// 8-bits-per-channel interface
+		//
+		load           :: proc(filename: cstring, x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]byte ---
+		load_from_file :: proc(f: ^c.FILE,        x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]byte ---
+
+		////////////////////////////////////
+		//
+		// 16-bits-per-channel interface
+		//
+		load_16           :: proc(filename: cstring, x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]u16 ---
+		load_16_from_file :: proc(f: ^c.FILE,        x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]u16 ---
+
+		////////////////////////////////////
+		//
+		// float-per-channel interface
+		//
+		loadf           :: proc(filename: cstring, x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]f32 ---
+		loadf_from_file :: proc(f: ^c.FILE,        x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]f32 ---
+
+		is_hdr           :: proc(filename: cstring) -> c.int ---
+		is_hdr_from_file :: proc(f: ^c.FILE)        -> c.int ---
+
+		// get image dimensions & components without fully decoding
+		info           :: proc(filename: cstring, x, y, comp: ^c.int) -> c.int ---
+		info_from_file :: proc(f: ^c.FILE,        x, y, comp: ^c.int) -> c.int ---
+
+		is_16_bit           :: proc(filename: cstring) -> b32 ---
+		is_16_bit_from_file :: proc(f: ^c.FILE)        -> b32 ---
+	}
+}
+
 @(default_calling_convention="c", link_prefix="stbi_")
 foreign stbi {
 	////////////////////////////////////
 	//
 	// 8-bits-per-channel interface
 	//
-	load                :: proc(filename: cstring,                 x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]byte ---
-	load_from_file      :: proc(f: ^c.FILE,                        x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]byte ---
 	load_from_memory    :: proc(buffer: [^]byte, len: c.int,       x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]byte ---
 	load_from_callbacks :: proc(clbk: ^Io_Callbacks, user: rawptr, x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]byte ---
 
@@ -50,8 +92,6 @@ foreign stbi {
 	//
 	// 16-bits-per-channel interface
 	//
-	load_16                :: proc(filename: cstring,           x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]u16 ---
-	load_16_from_file      :: proc(f: ^c.FILE,                  x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]u16 ---
 	load_16_from_memory    :: proc(buffer: [^]byte, len: c.int, x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]u16 ---
 	load_16_from_callbacks :: proc(clbk: ^Io_Callbacks,         x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]u16 ---
 
@@ -59,8 +99,6 @@ foreign stbi {
 	//
 	// float-per-channel interface
 	//
-	loadf                 :: proc(filename: cstring,                 x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]f32 ---
-	loadf_from_file       :: proc(f: ^c.FILE,                        x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]f32 ---
 	loadf_from_memory     :: proc(buffer: [^]byte, len: c.int,       x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]f32 ---
 	loadf_from_callbacks  :: proc(clbk: ^Io_Callbacks, user: rawptr, x, y, channels_in_file: ^c.int, desired_channels: c.int) -> [^]f32 ---
 
@@ -73,9 +111,6 @@ foreign stbi {
 	is_hdr_from_callbacks :: proc(clbk: ^Io_Callbacks, user: rawptr) -> c.int ---
 	is_hdr_from_memory    :: proc(buffer: [^]byte, len: c.int)       -> c.int ---
 
-	is_hdr           :: proc(filename: cstring) -> c.int ---
-	is_hdr_from_file :: proc(f: ^c.FILE)        -> c.int ---
-
 	// get a VERY brief reason for failure
 	// NOT THREADSAFE
 	failure_reason :: proc() -> cstring ---
@@ -84,13 +119,9 @@ foreign stbi {
 	image_free :: proc(retval_from_load: rawptr) ---
 
 	// get image dimensions & components without fully decoding
-	info                :: proc(filename: cstring,                 x, y, comp: ^c.int) -> c.int ---
-	info_from_file      :: proc(f: ^c.FILE,                        x, y, comp: ^c.int) -> c.int ---
 	info_from_memory    :: proc(buffer: [^]byte, len: c.int,       x, y, comp: ^c.int) -> c.int ---
 	info_from_callbacks :: proc(clbk: ^Io_Callbacks, user: rawptr, x, y, comp: ^c.int) -> c.int ---
 	
-	is_16_bit             :: proc(filename: cstring) -> b32 ---
-	is_16_bit_from_file   :: proc(f: ^c.FILE) -> b32 ---
 	is_16_bit_from_memory :: proc(buffer: [^]byte, len: c.int) -> c.int ---
 
 	// for image formats that explicitly notate that they have premultiplied alpha,

vendor/stb/image/stb_image_resize.odin

@@ -7,6 +7,7 @@ RESIZE_LIB :: (
 	     "../lib/stb_image_resize.lib"      when ODIN_OS == .Windows
 	else "../lib/stb_image_resize.a"        when ODIN_OS == .Linux
 	else "../lib/darwin/stb_image_resize.a" when ODIN_OS == .Darwin
+	else "../lib/stb_image_resize_wasm.o"   when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
 	else ""
 )
 
@@ -15,7 +16,11 @@ when RESIZE_LIB != "" {
 		// The STB libraries are shipped with the compiler on Windows so a Windows specific message should not be needed.
 		#panic("Could not find the compiled STB libraries, they can be compiled by running `make -C \"" + ODIN_ROOT + "vendor/stb/src\"`")
 	}
+}
 
+when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
+	foreign import lib "../lib/stb_image_resize_wasm.o"
+} else when RESIZE_LIB != "" {
 	foreign import lib { RESIZE_LIB }
 } else {
 	foreign import lib "system:stb_image_resize"

vendor/stb/image/stb_image_wasm.odin

@@ -0,0 +1,4 @@
+//+build wasm32, wasm64p32
+package stb_image
+
+@(require) import _ "vendor:libc"

vendor/stb/image/stb_image_write.odin

@@ -7,6 +7,7 @@ WRITE_LIB :: (
 	     "../lib/stb_image_write.lib"      when ODIN_OS == .Windows
 	else "../lib/stb_image_write.a"        when ODIN_OS == .Linux
 	else "../lib/darwin/stb_image_write.a" when ODIN_OS == .Darwin
+	else "../lib/stb_image_write_wasm.o"   when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
 	else ""
 )
 
@@ -15,7 +16,11 @@ when WRITE_LIB != "" {
 		// The STB libraries are shipped with the compiler on Windows so a Windows specific message should not be needed.
 		#panic("Could not find the compiled STB libraries, they can be compiled by running `make -C \"" + ODIN_ROOT + "vendor/stb/src\"`")
 	}
+}
 
+when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
+	foreign import stbiw "../lib/stb_image_write_wasm.o"
+} else when WRITE_LIB != "" {
 	foreign import stbiw { WRITE_LIB }
 } else {
 	foreign import stbiw "system:stb_image_write"
@@ -25,12 +30,6 @@ write_func :: proc "c" (ctx: rawptr, data: rawptr, size: c.int)
 
 @(default_calling_convention="c", link_prefix="stbi_")
 foreign stbiw {
-	write_png :: proc(filename: cstring, w, h, comp: c.int, data: rawptr, stride_in_bytes: c.int)     -> c.int ---
-	write_bmp :: proc(filename: cstring, w, h, comp: c.int, data: rawptr)                             -> c.int ---
-	write_tga :: proc(filename: cstring, w, h, comp: c.int, data: rawptr)                             -> c.int ---
-	write_hdr :: proc(filename: cstring, w, h, comp: c.int, data: [^]f32)                             -> c.int ---
-	write_jpg :: proc(filename: cstring, w, h, comp: c.int, data: rawptr, quality: c.int /*0..=100*/) -> c.int ---
-	
 	write_png_to_func :: proc(func: write_func, ctx: rawptr, w, h, comp: c.int, data: rawptr, stride_in_bytes: c.int)     -> c.int ---
 	write_bmp_to_func :: proc(func: write_func, ctx: rawptr, w, h, comp: c.int, data: rawptr)                             -> c.int ---
 	write_tga_to_func :: proc(func: write_func, ctx: rawptr, w, h, comp: c.int, data: rawptr)                             -> c.int ---
@@ -39,3 +38,14 @@ foreign stbiw {
 	
 	flip_vertically_on_write :: proc(flip_boolean: b32) ---
 }
+
+when !NO_STDIO {
+	@(default_calling_convention="c", link_prefix="stbi_")
+	foreign stbiw {
+		write_png :: proc(filename: cstring, w, h, comp: c.int, data: rawptr, stride_in_bytes: c.int)     -> c.int ---
+		write_bmp :: proc(filename: cstring, w, h, comp: c.int, data: rawptr)                             -> c.int ---
+		write_tga :: proc(filename: cstring, w, h, comp: c.int, data: rawptr)                             -> c.int ---
+		write_hdr :: proc(filename: cstring, w, h, comp: c.int, data: [^]f32)                             -> c.int ---
+		write_jpg :: proc(filename: cstring, w, h, comp: c.int, data: rawptr, quality: c.int /*0..=100*/) -> c.int ---
+	}
+}

vendor/stb/rect_pack/stb_rect_pack.odin

@@ -9,6 +9,7 @@ LIB :: (
 	     "../lib/stb_rect_pack.lib"      when ODIN_OS == .Windows
 	else "../lib/stb_rect_pack.a"        when ODIN_OS == .Linux
 	else "../lib/darwin/stb_rect_pack.a" when ODIN_OS == .Darwin
+	else "../lib/stb_rect_pack_wasm.o"   when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
 	else ""
 )
 
@@ -16,7 +17,11 @@ when LIB != "" {
 	when !#exists(LIB) {
 		#panic("Could not find the compiled STB libraries, they can be compiled by running `make -C \"" + ODIN_ROOT + "vendor/stb/src\"`")
 	}
+}
 
+when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
+	foreign import lib "../lib/stb_rect_pack_wasm.o"
+} else when LIB != "" {
 	foreign import lib { LIB }
 } else {
 	foreign import lib "system:stb_rect_pack"

vendor/stb/rect_pack/stb_rect_pack_wasm.odin

@@ -0,0 +1,4 @@
+//+build wasm32, wasm64p32
+package stb_rect_pack
+
+@(require) import _ "vendor:libc"

vendor/stb/sprintf/stb_sprintf.odin

@@ -0,0 +1,37 @@
+package stb_sprintf
+
+import "core:c"
+
+@(private)
+LIB :: (
+	     "../lib/stb_sprintf.lib"      when ODIN_OS == .Windows
+	else "../lib/stb_sprintf.a"        when ODIN_OS == .Linux
+	else "../lib/darwin/stb_sprintf.a" when ODIN_OS == .Darwin
+	else "../lib/stb_sprintf_wasm.o"   when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
+	else ""
+)
+
+when LIB != "" {
+	when !#exists(LIB) {
+		#panic("Could not find the compiled STB libraries, they can be compiled by running `make -C \"" + ODIN_ROOT + "vendor/stb/src\"`")
+	}
+}
+
+when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
+	foreign import stbpf "../lib/stb_sprintf_wasm.o"
+} else when LIB != "" {
+	foreign import stbpf { LIB }
+} else {
+	foreign import stbpf "system:stb_sprintf"
+}
+
+@(link_prefix="stbsp_", default_calling_convention="c")
+foreign stbpf {
+	sprintf    :: proc(buf: [^]byte, fmt: cstring, #c_vararg args: ..any) -> i32 ---
+	snprintf   :: proc(buf: [^]byte, count: i32, fmt: cstring, #c_vararg args: ..any) -> i32 ---
+	vsprintf   :: proc(buf: [^]byte, fmt: cstring, va: c.va_list) -> i32 ---
+	vsnprintf  :: proc(buf: [^]byte, count: i32, fmt: cstring, va: ^c.va_list) -> i32 ---
+	vsprintfcb :: proc(callback: SPRINTFCB, user: rawptr, buf: [^]byte, fmt: cstring, va: ^c.va_list) -> i32 ---
+}
+
+SPRINTFCB :: #type proc "c" (buf: [^]byte, user: rawptr, len: i32) -> cstring

vendor/stb/src/Makefile

@@ -8,17 +8,24 @@ endif
 
 wasm:
 	mkdir -p ../lib
-	$(CC) -c -Os --target=wasm32 -nostdlib stb_truetype_wasm.c -o ../lib/stb_truetype_wasm.o
+	$(CC) -c -Os --target=wasm32 --sysroot=$(shell odin root)/vendor/libc stb_image.c        -o ../lib/stb_image_wasm.o        -DSTBI_NO_STDIO
+	$(CC) -c -Os --target=wasm32 --sysroot=$(shell odin root)/vendor/libc stb_image_write.c  -o ../lib/stb_image_write_wasm.o  -DSTBI_WRITE_NO_STDIO 
+	$(CC) -c -Os --target=wasm32 --sysroot=$(shell odin root)/vendor/libc stb_image_resize.c -o ../lib/stb_image_resize_wasm.o
+	$(CC) -c -Os --target=wasm32 --sysroot=$(shell odin root)/vendor/libc stb_truetype.c     -o ../lib/stb_truetype_wasm.o
+	# $(CC) -c -Os --target=wasm32 --sysroot=$(shell odin root)/vendor/libc stb_vorbis.c       -o ../lib/stb_vorbis_wasm.o       -DSTB_VORBIS_NO_STDIO
+	$(CC) -c -Os --target=wasm32 --sysroot=$(shell odin root)/vendor/libc stb_rect_pack.c    -o ../lib/stb_rect_pack_wasm.o
+	$(CC) -c -Os --target=wasm32                                          stb_sprintf.c      -o ../lib/stb_sprintf_wasm.o
 
 unix:
 	mkdir -p ../lib
-	$(CC) -c -O2 -Os -fPIC stb_image.c stb_image_write.c stb_image_resize.c stb_truetype.c stb_rect_pack.c stb_vorbis.c
+	$(CC) -c -O2 -Os -fPIC stb_image.c stb_image_write.c stb_image_resize.c stb_truetype.c stb_rect_pack.c stb_vorbis.c stb_sprintf.c
 	$(AR) rcs ../lib/stb_image.a        stb_image.o
 	$(AR) rcs ../lib/stb_image_write.a  stb_image_write.o
 	$(AR) rcs ../lib/stb_image_resize.a stb_image_resize.o
 	$(AR) rcs ../lib/stb_truetype.a     stb_truetype.o
 	$(AR) rcs ../lib/stb_rect_pack.a    stb_rect_pack.o
 	$(AR) rcs ../lib/stb_vorbis.a       stb_vorbis.o
+	$(AR) rcs ../lib/stb_sprintf.a      stb_sprintf.o
 	#$(CC) -fPIC -shared -Wl,-soname=stb_image.so         -o ../lib/stb_image.so        stb_image.o
 	#$(CC) -fPIC -shared -Wl,-soname=stb_image_write.so   -o ../lib/stb_image_write.so  stb_image_write.o
 	#$(CC) -fPIC -shared -Wl,-soname=stb_image_resize.so  -o ../lib/stb_image_resize.so stb_image_resize.o
@@ -47,4 +54,7 @@ darwin:
 	$(CC) -arch x86_64 -c -O2 -Os -fPIC stb_vorbis.c -o stb_vorbis-x86_64.o -mmacosx-version-min=10.12
 	$(CC) -arch arm64  -c -O2 -Os -fPIC stb_vorbis.c -o stb_vorbis-arm64.o -mmacosx-version-min=10.12
 	lipo -create stb_vorbis-x86_64.o stb_vorbis-arm64.o -output ../lib/darwin/stb_vorbis.a
+	$(CC) -arch x86_64 -c -O2 -Os -fPIC stb_sprintf.c -o stb_sprintf-x86_64.o -mmacosx-version-min=10.12
+	$(CC) -arch arm64  -c -O2 -Os -fPIC stb_sprintf.c -o stb_sprintf-arm64.o -mmacosx-version-min=10.12
+	lipo -create stb_sprintf-x86_64.o stb_sprintf-arm64.o -output ../lib/darwin/stb_sprintf.a
 	rm *.o

vendor/stb/src/stb_sprintf.c

@@ -0,0 +1,2 @@
+#define STB_SPRINTF_IMPLEMENTATION
+#include "stb_sprintf.h"

vendor/stb/src/stb_truetype_wasm.c

@@ -1,46 +0,0 @@
-#include <stddef.h>
-
-void *stbtt_malloc(size_t size);
-void stbtt_free(void *ptr);
-
-void stbtt_qsort(void* base, size_t num, size_t size, int (*compare)(const void*, const void*));
-
-double stbtt_floor(double x);
-double stbtt_ceil(double x);
-double stbtt_sqrt(double x);
-double stbtt_pow(double x, double y);
-double stbtt_fmod(double x, double y);
-double stbtt_cos(double x);
-double stbtt_acos(double x);
-double stbtt_fabs(double x);
-
-unsigned long stbtt_strlen(const char *str);
-
-void *memcpy(void *dst, const void *src, size_t count);
-void *memset(void *dst, int x, size_t count);
-
-#define STBRP_SORT stbtt_qsort
-#define STBRP_ASSERT(condition) ((void)0)
-
-#define STBTT_malloc(x,u)  ((void)(u),stbtt_malloc(x))
-#define STBTT_free(x,u)    ((void)(u),stbtt_free(x))
-
-#define STBTT_assert(condition) ((void)0)
-
-#define STBTT_ifloor(x)   ((int) stbtt_floor(x))
-#define STBTT_iceil(x)    ((int) stbtt_ceil(x))
-#define STBTT_sqrt(x)      stbtt_sqrt(x)
-#define STBTT_pow(x,y)     stbtt_pow(x,y)
-#define STBTT_fmod(x,y)    stbtt_fmod(x,y)
-#define STBTT_cos(x)       stbtt_cos(x)
-#define STBTT_acos(x)      stbtt_acos(x)
-#define STBTT_fabs(x)      stbtt_fabs(x)
-#define STBTT_strlen(x)    stbtt_strlen(x)
-#define STBTT_memcpy       memcpy
-#define STBTT_memset       memset
-
-#define STB_RECT_PACK_IMPLEMENTATION
-#include "stb_rect_pack.h"
-
-#define STB_TRUETYPE_IMPLEMENTATION
-#include "stb_truetype.h"

vendor/stb/truetype/stb_truetype.odin

@@ -8,6 +8,7 @@ LIB :: (
 	     "../lib/stb_truetype.lib"      when ODIN_OS == .Windows
 	else "../lib/stb_truetype.a"        when ODIN_OS == .Linux
 	else "../lib/darwin/stb_truetype.a" when ODIN_OS == .Darwin
+	else "../lib/stb_truetype_wasm.o"   when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
 	else ""
 )
 
@@ -15,10 +16,12 @@ when LIB != "" {
 	when !#exists(LIB) {
 		#panic("Could not find the compiled STB libraries, they can be compiled by running `make -C \"" + ODIN_ROOT + "vendor/stb/src\"`")
 	}
+}
 
-	foreign import stbtt { LIB }
-} else when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
+when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
 	foreign import stbtt "../lib/stb_truetype_wasm.o"
+} else when LIB != "" {
+	foreign import stbtt { LIB }
 } else {
 	foreign import stbtt "system:stb_truetype"
 }

vendor/stb/truetype/stb_truetype_wasm.odin

@@ -1,82 +1,4 @@
 //+build wasm32, wasm64p32
 package stb_truetype
 
-import "base:builtin"
-import "base:intrinsics"
-import "base:runtime"
-
-import "core:c"
-import "core:math"
-import "core:slice"
-import "core:sort"
-
-@(require, linkage="strong", link_name="stbtt_malloc")
-malloc :: proc "c" (size: uint) -> rawptr {
-	context = runtime.default_context()
-	ptr, _ := runtime.mem_alloc_non_zeroed(int(size))
-	return raw_data(ptr)
-}
-
-@(require, linkage="strong", link_name="stbtt_free")
-free :: proc "c" (ptr: rawptr) {
-	context = runtime.default_context()
-	builtin.free(ptr)
-}
-
-@(require, linkage="strong", link_name="stbtt_qsort")
-qsort :: proc "c" (base: rawptr, num: uint, size: uint, cmp: proc "c" (a, b: rawptr) -> i32) {
-	context = runtime.default_context()
-
-	Inputs :: struct {
-		base: rawptr,
-		num:  uint,
-		size: uint,
-		cmp:  proc "c" (a, b: rawptr) -> i32,
-	}
-
-	sort.sort({
-		collection = &Inputs{base, num, size, cmp},
-		len = proc(it: sort.Interface) -> int {
-			inputs := (^Inputs)(it.collection)
-			return int(inputs.num)
-		},
-		less = proc(it: sort.Interface, i, j: int) -> bool {
-			inputs := (^Inputs)(it.collection)
-			a := rawptr(uintptr(inputs.base) + (uintptr(i) * uintptr(inputs.size)))
-			b := rawptr(uintptr(inputs.base) + (uintptr(j) * uintptr(inputs.size)))
-			return inputs.cmp(a, b) < 0
-		},
-		swap = proc(it: sort.Interface, i, j: int) {
-			inputs := (^Inputs)(it.collection)
-
-			a := rawptr(uintptr(inputs.base) + (uintptr(i) * uintptr(inputs.size)))
-			b := rawptr(uintptr(inputs.base) + (uintptr(j) * uintptr(inputs.size)))
-
-			slice.ptr_swap_non_overlapping(a, b, int(inputs.size))
-		},
-	})
-}
-
-@(require, linkage="strong", link_name="stbtt_floor")
-floor :: proc "c" (x: f64) -> f64 { return math.floor(x) }
-@(require, linkage="strong", link_name="stbtt_ceil")
-ceil :: proc "c" (x: f64) -> f64 { return math.ceil(x) }
-@(require, linkage="strong", link_name="stbtt_sqrt")
-sqrt :: proc "c" (x: f64) -> f64 { return math.sqrt(x) }
-@(require, linkage="strong", link_name="stbtt_pow")
-pow :: proc "c" (x, y: f64) -> f64 { return math.pow(x, y) }
-@(require, linkage="strong", link_name="stbtt_fmod")
-fmod :: proc "c" (x, y: f64) -> f64 { return math.mod(x, y) }
-@(require, linkage="strong", link_name="stbtt_cos")
-cos :: proc "c" (x: f64) -> f64 { return math.cos(x) }
-@(require, linkage="strong", link_name="stbtt_acos")
-acos :: proc "c" (x: f64) -> f64 { return math.acos(x) }
-@(require, linkage="strong", link_name="stbtt_fabs")
-fabs :: proc "c" (x: f64) -> f64 { return math.abs(x) }
-
-@(require, linkage="strong", link_name="stbtt_strlen")
-strlen :: proc "c" (str: cstring) -> c.ulong { return c.ulong(len(str)) }
-
-// NOTE: defined in runtime.
-// void *memcpy(void *dst, const void *src, size_t count);
-// void *memset(void *dst, int x, size_t count);
+@(require) import _ "vendor:libc"