diff --git a/.vscode/launch.json b/.vscode/launch.json
index 17869b3..69f6bc4 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -1,6 +1,13 @@
 {
     "version": "0.2.0",
     "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}"
+        },
         {
             "name": "C/C++: clang++ build and debug active file",
             "type": "cppdbg",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8a74978..1c8d3c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.12)
 
-set(CMAKE_C_STANDARD 17)
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Werror")
+set(CMAKE_C_STANDARD 11)
 
 project(examples C)
 
diff --git a/examples/c/character.c b/examples/c/character.c
index d8ed068..f36497c 100644
--- a/examples/c/character.c
+++ b/examples/c/character.c
@@ -19,7 +19,7 @@ void blend_tile(const pp_tile_t *t) {
   for(int32_t y = t->y; y < t->y + t->h; y++) {
     for(int32_t x = t->x; x < t->x + t->w; x++) {     
       colour alpha_pen = pen;
-      alpha_pen.rgba.a = alpha(pen.rgba.a, pp_tile_get(t, x, y));
+      alpha_pen.a = alpha(pen.a, pp_tile_get(t, x, y));
       buffer[y][x] = blend(buffer[y][x], alpha_pen);
     }
   }
diff --git a/examples/c/geometry.c b/examples/c/geometry.c
index 4c59481..8c858a7 100644
--- a/examples/c/geometry.c
+++ b/examples/c/geometry.c
@@ -18,7 +18,7 @@ void blend_tile(const pp_tile_t *t) {
   for(int32_t y = t->y; y < t->y + t->h; y++) {
     for(int32_t x = t->x; x < t->x + t->w; x++) {     
       colour alpha_pen = pen;
-      alpha_pen.rgba.a = alpha(pen.rgba.a, pp_tile_get(t, x, y));
+      alpha_pen.a = alpha(pen.a, pp_tile_get(t, x, y));
       buffer[y][x] = blend(buffer[y][x], alpha_pen);
     }
   }
diff --git a/examples/c/helpers.h b/examples/c/helpers.h
index 27f66e7..a523f3c 100644
--- a/examples/c/helpers.h
+++ b/examples/c/helpers.h
@@ -10,7 +10,7 @@ typedef union {
     uint8_t g;
     uint8_t b;
     uint8_t a;
-  } rgba;
+  };
   uint32_t c;
 } colour;
 
@@ -24,22 +24,20 @@ __attribute__((always_inline)) uint8_t blend_channel(uint8_t s, uint8_t d, uint8
 
 colour blend(colour dest, colour src) {
 
-  uint16_t a = alpha(src.rgba.a, dest.rgba.a);
-
-  if(src.rgba.a == 0) return dest;
-  if(src.rgba.a == 255) return src;
+  if(src.a == 0) return dest;
+  if(src.a == 255) return src;
 
   colour result;
-  result.rgba.r = blend_channel(src.rgba.r, dest.rgba.r, src.rgba.a);
-  result.rgba.g = blend_channel(src.rgba.g, dest.rgba.g, src.rgba.a);
-  result.rgba.b = blend_channel(src.rgba.b, dest.rgba.b, src.rgba.a);
-  result.rgba.a = dest.rgba.a > src.rgba.a ? dest.rgba.a : src.rgba.a;
+  result.r = blend_channel(src.r, dest.r, src.a);
+  result.g = blend_channel(src.g, dest.g, src.a);
+  result.b = blend_channel(src.b, dest.b, src.a);
+  result.a = dest.a > src.a ? dest.a : src.a;
 
   return result;
 }
 
 colour create_colour(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
-  return (colour){ .rgba.r = r, .rgba.g = g, .rgba.b = b, .rgba.a = a };
+  return (colour){ .r = r, .g = g, .b = b, .a = a };
 }
 
 colour create_colour_hsv(float h, float s, float v, float a) {
diff --git a/examples/c/logo.c b/examples/c/logo.c
index c225288..e4587f8 100644
--- a/examples/c/logo.c
+++ b/examples/c/logo.c
@@ -21,7 +21,7 @@ void blend_tile(const pp_tile_t *t) {
   for(int32_t y = t->y; y < t->y + t->h; y++) {
     for(int32_t x = t->x; x < t->x + t->w; x++) {     
       colour alpha_pen = pen;
-      alpha_pen.rgba.a = alpha(pen.rgba.a, pp_tile_get(t, x, y));
+      alpha_pen.a = alpha(pen.a, pp_tile_get(t, x, y));
       buffer[y][x] = blend(buffer[y][x], alpha_pen);
     }
   }
@@ -305,7 +305,7 @@ int main() {
 
     if(i == 360) {
       pp_mat3_t st = t;      
-      pp_mat3_translate(&st, 90, 90);
+      pp_mat3_translate(&st, 50, 50);
       pp_transform(&st);
       set_pen(create_colour(20, 30, 40, 160));
       pp_render(&polygon);
diff --git a/examples/go/geometry/go.sum b/examples/go/geometry/go.sum
new file mode 100644
index 0000000..2194c5f
--- /dev/null
+++ b/examples/go/geometry/go.sum
@@ -0,0 +1,47 @@
+github.com/ebitengine/purego v0.5.0 h1:JrMGKfRIAM4/QVKaesIIT7m/UVjTj5GYhRSQYwfVdpo=
+github.com/ebitengine/purego v0.5.0/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
+github.com/hajimehoshi/ebiten/v2 v2.6.0 h1:nh09FUhjNGFVcUUPsx6oTMbD1pHerNvTKPE+494y3cU=
+github.com/hajimehoshi/ebiten/v2 v2.6.0/go.mod h1:TZtorL713an00UW4LyvMeKD8uXWnuIuCPtlH11b0pgI=
+github.com/jezek/xgb v1.1.0 h1:wnpxJzP1+rkbGclEkmwpVFQWpuE2PUGNUzP8SbfFobk=
+github.com/jezek/xgb v1.1.0/go.mod h1:nrhwO0FX/enq75I7Y7G8iN1ubpSGZEiA3v9e9GyRFlk=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/exp/shiny v0.0.0-20230817173708-d852ddb80c63 h1:3AGKexOYqL+ztdWdkB1bDwXgPBuTS/S8A4WzuTvJ8Cg=
+golang.org/x/exp/shiny v0.0.0-20230817173708-d852ddb80c63/go.mod h1:UH99kUObWAZkDnWqppdQe5ZhPYESUw8I0zVV1uWBR+0=
+golang.org/x/image v0.12.0 h1:w13vZbU4o5rKOFFR8y7M+c4A5jXDC0uXTdHYRP8X2DQ=
+golang.org/x/image v0.12.0/go.mod h1:Lu90jvHG7GfemOIcldsh9A2hS01ocl6oNO7ype5mEnk=
+golang.org/x/mobile v0.0.0-20230922142353-e2f452493d57 h1:Q6NT8ckDYNcwmi/bmxe+XbiDMXqMRW1xFBtJ+bIpie4=
+golang.org/x/mobile v0.0.0-20230922142353-e2f452493d57/go.mod h1:wEyOn6VvNW7tcf+bW/wBz1sehi2s2BZ4TimyR7qZen4=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/examples/go/geometry/main b/examples/go/geometry/main
deleted file mode 100755
index 9c96efb..0000000
Binary files a/examples/go/geometry/main and /dev/null differ
diff --git a/examples/go/geometry/main.go b/examples/go/geometry/main.go
index 12453c3..c8d4342 100644
--- a/examples/go/geometry/main.go
+++ b/examples/go/geometry/main.go
@@ -5,45 +5,120 @@ package main
 #include <../../../pretty-poly.h>
 
 // wrap tile callback to dereference pointer
-extern void blend_tile(pp_tile_t t);
-void wrap_blend_tile(const pp_tile_t* t) {
-  blend_tile(*t);
+extern void wrapped_blend_tile_callback_go(pp_tile_t t);
+void wrapped_blend_tile_callback_c(const pp_tile_t* t) {
+  wrapped_blend_tile_callback_go(*t);
 }
 */
 import "C"
 import (
+	"image/color"
+	"log"
+	"math"
 	"runtime"
 	"unsafe"
+
+	"github.com/hajimehoshi/ebiten/v2"
 )
 
-type point struct {
-	x float32
-	y float32
-}
-type path struct {
-	points *point
-	count  uint32
-}
-type polygon struct {
-	paths *path
-	count uint32
+type Game struct{}
+
+func (g *Game) Update() error {
+	return nil
 }
 
-func main() {
+var s *ebiten.Image
+var angle float32
+var pen color.NRGBA
 
-	C.pp_tile_callback(C.pp_tile_callback_t(C.wrap_blend_tile))
-	C.pp_antialias(C.PP_AA_X4)
-	C.pp_clip(0, 0, 320, 240)
+func (g *Game) Draw(screen *ebiten.Image) {
 
-	points := []point{{-128, -128}, {128, -128}, {128, 128}, {-128, 128}}
-	paths := []path{{points: &points[0], count: 4}}
-	poly := polygon{paths: &paths[0], count: 1}
+	s = screen
+	angle += 0.5
 
+	points := []C.pp_point_t{{-32, -32}, {32, -32}, {32, 32}, {-32, 32}}
+	paths := []C.pp_path_t{{points: &points[0], count: 4}}
+	poly := C.pp_poly_t{paths: &paths[0], count: 1}
 	var pinner runtime.Pinner
 	pinner.Pin(&points[0])
 	pinner.Pin(&paths[0])
-	pinner.Pin(&poly)
-	C.pp_render((*C.pp_poly_t)(unsafe.Pointer(&poly)))
+
+	for i := float32(0); i < 20; i += 2 {
+		t := C.pp_mat3_identity()
+		C.pp_mat3_translate(&t, 80, 60)
+		a := math.Sin(float64(angle+i)/50) * 360
+		C.pp_mat3_rotate(&t, C.float(a))
+		C.pp_mat3_scale(&t, C.float(1.5-i/20), C.float(1.5-i/20))
+		C.pp_transform(&t)
+
+		pen = color.NRGBA{uint8(i * 12), uint8(i * 5), uint8(i * 3), uint8(255)}
+
+		C.pp_render((*C.pp_poly_t)(unsafe.Pointer(&poly)))
+	}
+
 	pinner.Unpin()
 
 }
+
+func (g *Game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
+	return 160, 120
+}
+
+func alpha(sa uint32, da uint32) uint32 {
+	return ((sa + 1) * (da)) >> 8
+}
+
+func blend_channel(s uint32, d uint32, a uint32) uint8 {
+	return uint8(d + ((a*(s-d) + 127) >> 8))
+}
+
+func blend(dest color.RGBA, src color.RGBA) color.RGBA {
+	if src.A == 0 {
+		return dest
+	}
+	if src.A == 255 {
+		return src
+	}
+
+	var result color.RGBA
+	result.R = blend_channel(uint32(src.R), uint32(dest.R), uint32(src.A))
+	result.G = blend_channel(uint32(src.G), uint32(dest.G), uint32(src.A))
+	result.B = blend_channel(uint32(src.B), uint32(dest.B), uint32(src.A))
+	result.A = max(dest.A, src.A)
+
+	return result
+
+}
+
+func blend_tile(t C.pp_tile_t) {
+	for y := int(t.y); y < int(t.y+t.h); y++ {
+		for x := int(t.x); x < int(t.x+t.w); x++ {
+			alpha := int(C.pp_tile_get(&t, C.int(x), C.int(y)))
+
+			d := s.RGBA64At(x, y)
+			da := color.RGBA{uint8(d.R >> 8), uint8(d.G >> 8), uint8(d.B >> 8), uint8(d.A >> 8)}
+
+			pa := color.RGBA{pen.R, pen.G, pen.B, uint8(alpha)}
+			c := blend(da, pa)
+
+			s.Set(x, y, c)
+		}
+	}
+
+}
+
+func main() {
+
+	C.pp_tile_callback(C.pp_tile_callback_t(C.wrapped_blend_tile_callback_c))
+	C.pp_antialias(C.PP_AA_X4)
+	C.pp_clip(0, 0, 160, 120)
+
+	ebiten.SetWindowSize(640, 480)
+	ebiten.SetWindowTitle("Pretty Poly Go Test")
+	ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
+
+	if err := ebiten.RunGame(&Game{}); err != nil {
+		log.Fatal(err)
+	}
+
+}
diff --git a/examples/go/geometry/wrappers.go b/examples/go/geometry/wrappers.go
index 20a5787..f333f5f 100644
--- a/examples/go/geometry/wrappers.go
+++ b/examples/go/geometry/wrappers.go
@@ -5,7 +5,7 @@ package main
 */
 import "C"
 
-//export blend_tile
-func blend_tile(t C.pp_tile_t) {
-	print("in tile callback")
+//export wrapped_blend_tile_callback_go
+func wrapped_blend_tile_callback_go(t C.pp_tile_t) {
+	blend_tile(t)
 }
diff --git a/pretty-poly.h b/pretty-poly.h
index 647b3c8..62230fc 100644
--- a/pretty-poly.h
+++ b/pretty-poly.h
@@ -1,28 +1,33 @@
-// Pretty Poly 🦜 - super-sampling polygon renderer for low resource platforms.
-//
-// Jonathan Williamson, August 2022
-// Examples, source, and more: https://github.com/lowfatcode/pretty-poly
-// MIT License https://github.com/lowfatcode/pretty-poly/blob/main/LICENSE
-// 
-// An easy way to render high quality text in embedded applications running 
-// on resource constrained microcontrollers such as the Cortex M0 and up.         
-//
-//   - Renders polygons: concave, self-intersecting, multi contour, holes, etc.
-//   - C17 header only library: simply copy the header file into your project
-//   - Tile based renderer: low memory footprint, cache coherency
-//   - Low memory usage: ~4kB of heap memory required
-//   - High speed on low resource platforms: optionally no floating point
-//   - Antialiasing modes: X1 (none), X4 and X16 super sampling
-//   - Bounds clipping: all results clipped to supplied clip rectangle
-//   - Pixel format agnostic: renders a "tile" to blend into your framebuffer
-//   - Support for hardware interpolators on rp2040 (thanks @MichaelBell!)
-//
-// Contributor bwaaaaaarks! 🦜
-//
-//   @MichaelBell - lots of bug fixes, performance boosts, and suggestions. 
-//   @gadgetoid - integrating into the PicoVector library and testing.
-
-#pragma once
+/*
+
+  Pretty Poly 🦜 - super-sampling polygon renderer for low resource platforms.
+
+  Jonathan Williamson, August 2022
+  Examples, source, and more: https://github.com/lowfatcode/pretty-poly
+  MIT License https://github.com/lowfatcode/pretty-poly/blob/main/LICENSE
+
+  An easy way to render high quality graphics in embedded applications running 
+  on resource constrained microcontrollers such as the Cortex M0 and up.         
+
+    - Renders polygons: concave, self-intersecting, multi contour, holes, etc.
+    - C11 header only library: simply copy the header file into your project
+    - Tile based renderer: low memory footprint, cache coherency
+    - Low memory usage: ~4kB of heap memory required
+    - High speed on low resource platforms: optionally no floating point
+    - Antialiasing modes: X1 (none), X4 and X16 super sampling
+    - Bounds clipping: all results clipped to supplied clip rectangle
+    - Pixel format agnostic: renders a "tile" to blend into your framebuffer
+    - Support for hardware interpolators on rp2040 (thanks @MichaelBell!)
+
+  Contributor bwaaaaaarks! 🦜
+
+    @MichaelBell - lots of bug fixes, performance boosts, and suggestions. 
+    @gadgetoid - integrating into the PicoVector library and testing.
+    
+*/
+
+#ifndef PP_INCLUDE_H
+#define PP_INCLUDE_H
 
 #include <stdlib.h>
 #include <stdint.h>
@@ -30,6 +35,12 @@
 #include <math.h>
 #include <stdbool.h>
 
+#ifndef PP_MALLOC
+#define PP_MALLOC(size)         malloc(size)
+#define PP_REALLOC(p, size)     realloc(p, size)
+#define PP_FREE(p)              free(p)
+#endif
+
 #ifndef PP_COORD_TYPE
 #define PP_COORD_TYPE float
 #endif
@@ -121,9 +132,12 @@ extern pp_mat3_t          *_pp_transform;
 void pp_clip(int32_t x, int32_t y, int32_t w, int32_t h);
 void pp_tile_callback(pp_tile_callback_t callback);
 void pp_antialias(pp_antialias_t antialias);
-void pp_transform(pp_mat3_t *transform);
+pp_mat3_t *pp_transform(pp_mat3_t *transform);
 void pp_render(pp_poly_t *polygon);
 
+pp_rect_t pp_contour_bounds(const pp_path_t *c);
+pp_rect_t pp_polygon_bounds(pp_poly_t *p);
+
 #ifdef __cplusplus
 }
 #endif
@@ -277,7 +291,7 @@ void pp_tile_callback(pp_tile_callback_t callback) {
 }
 
 // maximum tile bounds determined by antialias level
-int32_t _pp_tile_width, _pp_tile_height;
+uint32_t _pp_tile_width, _pp_tile_height;
 void pp_antialias(pp_antialias_t antialias) {
   _pp_antialias = antialias;
   // recalculate the tile size for rendering based on antialiasing level
@@ -285,8 +299,10 @@ void pp_antialias(pp_antialias_t antialias) {
   _pp_tile_width = (int)(tile_buffer_size / _pp_tile_height);
 }
 
-void pp_transform(pp_mat3_t *transform) {
+pp_mat3_t *pp_transform(pp_mat3_t *transform) {
+  pp_mat3_t *old = _pp_transform;
   _pp_transform = transform;
+  return old;
 }
 
 // write out the tile bits
@@ -453,7 +469,7 @@ pp_rect_t render_nodes(uint8_t *buffer, pp_rect_t *tb) {
   PP_COORD_TYPE aa_scale = (PP_COORD_TYPE)(1 << _pp_antialias);
   int anitialias_mask = (1 << _pp_antialias) - 1;
 
-  for(uint32_t y = 0; y < PP_NODE_BUFFER_HEIGHT; y++) {
+  for(int32_t y = 0; y < PP_NODE_BUFFER_HEIGHT; y++) {
     if(node_counts[y] == 0) {
       if (y == rb.y) ++rb.y;
       continue;
@@ -585,7 +601,7 @@ void pp_render(pp_poly_t *polygon) {
 
       pp_tile_t tile = {        
         .x = tb.x, .y = tb.y, .w = tb.w, .h = tb.h,
-        .stride = _pp_tile_width,
+        .stride = (uint32_t)_pp_tile_width,
         .data = tile_buffer + rb.x + _pp_tile_width * rb.y
       };
 
@@ -598,4 +614,6 @@ void pp_render(pp_poly_t *polygon) {
 #endif
 }
 
-#endif // PP_IMPLEMENTATION
\ No newline at end of file
+#endif // PP_IMPLEMENTATION
+
+#endif // PP_INCLUDE_H
\ No newline at end of file