diff --git a/apps/gl_test.c b/apps/gl_test.c
index b6e23e8..7a88d41 100644
--- a/apps/gl_test.c
+++ b/apps/gl_test.c
@@ -174,9 +174,8 @@ int CanvasCallback(EsElement *element, EsMessage *message) {
 		message->animate.complete = false;
 		timeMs += message->animate.deltaMs;
 
-		int width, height;
-		EsElementGetSize(element, &width, &height);
-		EsRectangle imageBounds = EsRectangleCenter(ES_RECT_2S(width, height), ES_RECT_2S(IMAGE_WIDTH, IMAGE_HEIGHT));
+		
+		EsRectangle imageBounds = EsRectangleCenter(EsElementGetInsetBounds(element), ES_RECT_2S(IMAGE_WIDTH, IMAGE_HEIGHT));
 		EsElementRepaint(element, &imageBounds);
 		return ES_HANDLED;
 	}
diff --git a/desktop/gui.cpp b/desktop/gui.cpp
index 04ed68c..4844245 100644
--- a/desktop/gui.cpp
+++ b/desktop/gui.cpp
@@ -1681,7 +1681,6 @@ void ProcessAnimations() {
 		}
 
 		element->lastTimeStamp += m.animate.deltaMs * api.startupInformation->timeStampTicksPerMs;
-		UIWindowNeedsUpdate(element->window);
 	}
 
 	if (waitMs > 0) {
@@ -5594,6 +5593,13 @@ EsRectangle EsWindowGetBounds(EsWindow *window) {
 	return bounds;
 }
 
+EsRectangle EsElementGetInsetBounds(EsElement *element) {
+	EsMessageMutexCheck();
+	EsRectangle insets = element->currentStyle->insets;
+	return ES_RECT_4(insets.l, element->width - insets.r, 
+			insets.t, element->height - insets.b);
+}
+
 EsRectangle EsElementGetInsetSize(EsElement *element) {
 	EsMessageMutexCheck();
 
diff --git a/desktop/os.header b/desktop/os.header
index e5ae9b1..6cec87c 100644
--- a/desktop/os.header
+++ b/desktop/os.header
@@ -2344,6 +2344,7 @@ function void EsElementRelayout(EsElement *element);
 function void EsElementSetCellRange(EsElement *element, int xFrom, int yFrom, int xTo = -1, int yTo = -1); // Use only if the parent is a ES_PANEL_TABLE.
 function EsRectangle EsElementGetInsets(EsElement *element); 
 function EsRectangle EsElementGetInsetSize(EsElement *element); // Get the size of the element, minus the insets.
+function EsRectangle EsElementGetInsetBounds(EsElement *element);
 function EsThemeMetrics EsElementGetMetrics(EsElement *element); // Returns the *scaled* metrics; the metrics given in the EsStyle passed to element creation functions should *not* be scaled.
 function float EsElementGetScaleFactor(EsElement *element);
 function EsRectangle EsElementGetPreferredSize(EsElement *element);
diff --git a/ports/uxn/LICENSE b/ports/uxn/LICENSE
new file mode 100644
index 0000000..37e59e5
--- /dev/null
+++ b/ports/uxn/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Devine Lu Linvega
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/ports/uxn/emulator.c b/ports/uxn/emulator.c
new file mode 100644
index 0000000..ff1bcc8
--- /dev/null
+++ b/ports/uxn/emulator.c
@@ -0,0 +1,354 @@
+// Ported by nakst.
+// TODO Keyboard support.
+// TODO Audio support.
+// TODO Time and date support.
+
+#include <essence.h>
+
+#define PPW (sizeof(unsigned int) * 2)
+#define realloc EsCRTrealloc
+#define Uint32 uint32_t
+
+typedef struct Ppu {
+	unsigned short width, height;
+	unsigned int *dat, stride;
+} Ppu;
+
+#ifdef DEBUG_BUILD
+#include "../../bin/uxn/src/uxn.c"
+#else
+#include "../../bin/uxn/src/uxn-fast.c"
+#endif
+#include "../../bin/uxn/src/devices/ppu.c"
+
+/*
+Copyright (c) 2021 Devine Lu Linvega
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE.
+*/
+
+static Ppu ppu;
+static Uxn u;
+static Device *devsystem, *devscreen, *devmouse, *devctrl;
+static Uint32 palette[16];
+
+static unsigned int reqdraw = 0;
+
+static int
+clamp(int val, int min, int max)
+{
+	return (val >= min) ? (val <= max) ? val : max : min;
+}
+
+static int
+error(char *msg, const char *err)
+{
+	EsPrint("%z: %z\n", msg, err);
+	return 0;
+}
+
+static void
+domouse(int mx, int my, bool pressed, bool released, bool right)
+{
+	Uint8 flag = 0x00;
+	Uint16 x = clamp(mx, 0, ppu.width - 1);
+	Uint16 y = clamp(my, 0, ppu.height - 1);
+	poke16(devmouse->dat, 0x2, x);
+	poke16(devmouse->dat, 0x4, y);
+	flag = right ? 0x10 : 0x01;
+	if (pressed) devmouse->dat[6] |= flag;
+	if (released) devmouse->dat[6] &= ~flag;
+}
+
+static Uint8
+get_pixel(int x, int y)
+{
+	unsigned int i = x / PPW + y * ppu.stride, shift = x % PPW * 4;
+	return (ppu.dat[i] >> shift) & 0xf;
+}
+
+void
+update_palette(Uint8 *addr)
+{
+	int i;
+	for(i = 0; i < 4; ++i) {
+		Uint8
+			r = (*(addr + i / 2) >> (!(i % 2) << 2)) & 0x0f,
+			g = (*(addr + 2 + i / 2) >> (!(i % 2) << 2)) & 0x0f,
+			b = (*(addr + 4 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
+		palette[i] = 0xff000000 | (r << 20) | (r << 16) | (g << 12) | (g << 8) | (b << 4) | b;
+	}
+	for(i = 4; i < 16; ++i)
+		palette[i] = palette[i / 4];
+	reqdraw = 1;
+}
+
+static int
+system_talk(Device *d, Uint8 b0, Uint8 w)
+{
+	if(!w) { /* read */
+		switch(b0) {
+		case 0x2: d->dat[0x2] = d->u->wst.ptr; break;
+		case 0x3: d->dat[0x3] = d->u->rst.ptr; break;
+		}
+	} else { /* write */
+		switch(b0) {
+		case 0x2: d->u->wst.ptr = d->dat[0x2]; break;
+		case 0x3: d->u->rst.ptr = d->dat[0x3]; break;
+		case 0xf: return 0;
+		}
+		if(b0 > 0x7 && b0 < 0xe)
+			update_palette(&d->dat[0x8]);
+	}
+	return 1;
+}
+
+static int
+console_talk(Device *d, Uint8 b0, Uint8 w)
+{
+	return 1;
+}
+
+static int
+screen_talk(Device *d, Uint8 b0, Uint8 w)
+{
+	if(!w) switch(b0) {
+		case 0x2: d->dat[0x2] = ppu.width >> 8; break;
+		case 0x3: d->dat[0x3] = ppu.width; break;
+		case 0x4: d->dat[0x4] = ppu.height >> 8; break;
+		case 0x5: d->dat[0x5] = ppu.height; break;
+		}
+	else
+		switch(b0) {
+		case 0x5:
+			ppu_set_size(&ppu, peek16(d->dat, 0x2), peek16(d->dat, 0x4));
+			break;
+		case 0xe: {
+			Uint16 x = peek16(d->dat, 0x8);
+			Uint16 y = peek16(d->dat, 0xa);
+			Uint8 layer = d->dat[0xe] & 0x40;
+			reqdraw |= ppu_pixel(&ppu, layer, x, y, d->dat[0xe] & 0x3);
+			if(d->dat[0x6] & 0x01) poke16(d->dat, 0x8, x + 1); /* auto x+1 */
+			if(d->dat[0x6] & 0x02) poke16(d->dat, 0xa, y + 1); /* auto y+1 */
+			break;
+		}
+		case 0xf: {
+			Uint16 x = peek16(d->dat, 0x8);
+			Uint16 y = peek16(d->dat, 0xa);
+			Uint8 layer = d->dat[0xf] & 0x40;
+			Uint8 *addr = &d->mem[peek16(d->dat, 0xc)];
+			if(d->dat[0xf] & 0x80) {
+				reqdraw |= ppu_2bpp(&ppu, layer, x, y, addr, d->dat[0xf] & 0xf, d->dat[0xf] & 0x10, d->dat[0xf] & 0x20);
+				if(d->dat[0x6] & 0x04) poke16(d->dat, 0xc, peek16(d->dat, 0xc) + 16); /* auto addr+16 */
+			} else {
+				reqdraw |= ppu_1bpp(&ppu, layer, x, y, addr, d->dat[0xf] & 0xf, d->dat[0xf] & 0x10, d->dat[0xf] & 0x20);
+				if(d->dat[0x6] & 0x04) poke16(d->dat, 0xc, peek16(d->dat, 0xc) + 8); /* auto addr+8 */
+			}
+			if(d->dat[0x6] & 0x01) poke16(d->dat, 0x8, x + 8); /* auto x+8 */
+			if(d->dat[0x6] & 0x02) poke16(d->dat, 0xa, y + 8); /* auto y+8 */
+			break;
+		}
+		}
+	return 1;
+}
+
+static int
+file_talk(Device *d, Uint8 b0, Uint8 w)
+{
+	Uint8 read = b0 == 0xd;
+	if(w && (read || b0 == 0xf)) {
+		char *name = (char *)&d->mem[peek16(d->dat, 0x8)];
+		Uint16 result = 0, length = peek16(d->dat, 0xa);
+		long offset = (peek16(d->dat, 0x4) << 16) + peek16(d->dat, 0x6);
+		Uint16 addr = peek16(d->dat, b0 - 1);
+
+		size_t pathBytes;
+		char *path = EsStringAllocateAndFormat(&pathBytes, "|Settings:/%z", name);
+		EsFileInformation file = EsFileOpen(path, pathBytes, read ? (ES_FILE_READ | ES_NODE_FAIL_IF_NOT_FOUND) : (ES_FILE_WRITE));
+		EsHeapFree(path, 0, NULL);
+
+		if (file.error != ES_SUCCESS) {
+			result = 0;
+		} else if (read) {
+			result = EsFileReadSync(file.handle, offset, length, &d->mem[addr]);
+			EsHandleClose(file.handle);
+		} else {
+			if (!offset) EsFileResize(file.handle, length);
+			result = EsFileWriteSync(file.handle, offset, length, &d->mem[addr]);
+			EsHandleClose(file.handle);
+		}
+
+		poke16(d->dat, 0x2, result);
+	}
+	return 1;
+}
+
+static int
+datetime_talk(Device *d, Uint8 b0, Uint8 w)
+{
+	poke16(d->dat, 0x0, 0);
+	d->dat[0x2] = 0;
+	d->dat[0x3] = 0;
+	d->dat[0x4] = 0;
+	d->dat[0x5] = 0;
+	d->dat[0x6] = 0;
+	d->dat[0x7] = 0;
+	poke16(d->dat, 0x08, 0);
+	d->dat[0xa] = 0;
+	(void)b0;
+	(void)w;
+	return 1;
+}
+
+static int
+nil_talk(Device *d, Uint8 b0, Uint8 w)
+{
+	(void)d;
+	(void)b0;
+	(void)w;
+	return 1;
+}
+
+static const char *errors[] = {"underflow", "overflow", "division by zero"};
+
+int
+uxn_halt(Uxn *u, Uint8 error, char *name, int id)
+{
+	EsPrint("Halted: %z %z#%x, at 0x%x\n", name, errors[error - 1], id, u->ram.ptr);
+	return 0;
+}
+
+bool Launch(const void *rom, size_t romBytes) {
+	if (romBytes > sizeof(u.ram.dat) - PAGE_PROGRAM) {
+		return false;
+	}
+
+	if (!uxn_boot(&u)) return false;
+	EsMemoryCopy(u.ram.dat + PAGE_PROGRAM, rom, romBytes);
+	reqdraw = 1;
+	const Uint16 width = 64 * 8, height = 40 * 8;
+	ppu_set_size(&ppu, width, height);
+
+	/* system   */ devsystem = uxn_port(&u, 0x0, system_talk);
+	/* console  */ uxn_port(&u, 0x1, console_talk);
+	/* screen   */ devscreen = uxn_port(&u, 0x2, screen_talk);
+	/* audio0   */ uxn_port(&u, 0x3, nil_talk);
+	/* audio1   */ uxn_port(&u, 0x4, nil_talk);
+	/* audio2   */ uxn_port(&u, 0x5, nil_talk);
+	/* audio3   */ uxn_port(&u, 0x6, nil_talk);
+	/* unused   */ uxn_port(&u, 0x7, nil_talk);
+	/* control  */ devctrl = uxn_port(&u, 0x8, nil_talk);
+	/* mouse    */ devmouse = uxn_port(&u, 0x9, nil_talk);
+	/* file     */ uxn_port(&u, 0xa, file_talk);
+	/* datetime */ uxn_port(&u, 0xb, datetime_talk);
+	/* unused   */ uxn_port(&u, 0xc, nil_talk);
+	/* unused   */ uxn_port(&u, 0xd, nil_talk);
+	/* unused   */ uxn_port(&u, 0xe, nil_talk);
+	/* unused   */ uxn_port(&u, 0xf, nil_talk);
+
+	uxn_eval(&u, PAGE_PROGRAM);
+
+	return true;
+}
+
+EsElement *canvas;
+uint32_t imageWidth, imageHeight;
+uint32_t *imageBits;
+uint16_t timeDeltaMs;
+bool inImageBounds;
+
+EsRectangle GetImageBounds(EsRectangle bounds /* canvas bounds */) {
+	if (!imageWidth || !imageHeight) return ES_RECT_1(0);
+	int zoomX = ES_RECT_WIDTH(bounds) / imageWidth, zoomY = ES_RECT_HEIGHT(bounds) / imageHeight;
+	int zoom = zoomX < 1 || zoomY < 1 ? 1 : zoomX > zoomY ? zoomY : zoomX;
+	return EsRectangleCenter(bounds, ES_RECT_2S(imageWidth * zoom, imageHeight * zoom));
+}
+
+void MouseEvent(bool pressed, bool released, bool right) {
+	if (!imageWidth) return;
+	EsPoint point = EsMouseGetPosition(canvas); 
+	EsRectangle imageBounds = GetImageBounds(EsElementGetInsetBounds(canvas));
+	inImageBounds = EsRectangleContains(imageBounds, point.x, point.y);
+	int zoom = ES_RECT_WIDTH(imageBounds) / imageWidth;
+	domouse((point.x - imageBounds.l) / zoom, (point.y - imageBounds.t) / zoom, pressed, released, right);
+	uxn_eval(&u, peek16(devmouse->dat, 0));
+}
+
+int CanvasMessage(EsElement *element, EsMessage *message) {
+	if (message->type == ES_MSG_PAINT) {
+		EsRectangle bounds = EsPainterBoundsInset(message->painter);
+		EsRectangle imageBounds = GetImageBounds(bounds);
+		EsDrawBitmapScaled(message->painter, imageBounds, ES_RECT_2S(imageWidth, imageHeight), imageBits, imageWidth * 4, ES_DRAW_BITMAP_OPAQUE);
+		EsDrawBlock(message->painter, ES_RECT_4(bounds.l, imageBounds.l, bounds.t, bounds.b), 0xFF000000);
+		EsDrawBlock(message->painter, ES_RECT_4(imageBounds.r, bounds.r, bounds.t, bounds.b), 0xFF000000);
+		EsDrawBlock(message->painter, ES_RECT_4(imageBounds.l, imageBounds.r, bounds.t, imageBounds.t), 0xFF000000);
+		EsDrawBlock(message->painter, ES_RECT_4(imageBounds.l, imageBounds.r, imageBounds.b, bounds.b), 0xFF000000);
+	} else if (message->type == ES_MSG_MOUSE_MOVED || message->type == ES_MSG_MOUSE_LEFT_DRAG || message->type == ES_MSG_MOUSE_RIGHT_DRAG) {
+		MouseEvent(false, false, false);
+	} else if (message->type == ES_MSG_MOUSE_LEFT_DOWN) {
+		MouseEvent(true, false, false);
+	} else if (message->type == ES_MSG_MOUSE_LEFT_UP) {
+		MouseEvent(false, true, false);
+	} else if (message->type == ES_MSG_MOUSE_RIGHT_DOWN) {
+		MouseEvent(true, false, true);
+	} else if (message->type == ES_MSG_MOUSE_RIGHT_UP) {
+		MouseEvent(false, true, false);
+	} else if (message->type == ES_MSG_GET_CURSOR && inImageBounds) {
+		message->cursorStyle = ES_CURSOR_BLANK;
+	} else if (message->type == ES_MSG_ANIMATE) {
+		message->animate.complete = false;
+		message->animate.waitMs = 16;
+		timeDeltaMs += message->animate.deltaMs;
+		bool needsRedraw = reqdraw;
+
+		while (timeDeltaMs > 16) {
+			uxn_eval(&u, peek16(devscreen->dat, 0));
+			if(devsystem->dat[0xe]) needsRedraw = true;
+			timeDeltaMs -= 16;
+		}
+
+		if (needsRedraw) {
+			if (imageWidth != ppu.width || imageHeight != ppu.height) {
+				imageWidth = ppu.width, imageHeight = ppu.height;
+				imageBits = (uint32_t *) EsHeapReallocate(imageBits, imageWidth * imageHeight * 4, false, NULL);
+			}
+
+			for (uint16_t y = 0; y < ppu.height; y++) {
+				for (uint16_t x = 0; x < ppu.width; x++) {
+					imageBits[x + y * ppu.width] = palette[get_pixel(x, y)] | 0xFF000000;
+				}
+			}
+
+			EsRectangle imageBounds = GetImageBounds(EsElementGetInsetBounds(element));
+			EsElementRepaint(element, &imageBounds);
+			reqdraw = false;
+		}
+	} else {
+		return 0;
+	}
+
+	return ES_HANDLED;
+}
+
+void _start() {
+	while (true) {
+		EsMessage *message = EsMessageReceive();
+
+		if (message->type == ES_MSG_INSTANCE_CREATE) {
+			EsInstance *instance = EsInstanceCreate(message, "Uxn Emulator", -1);
+			canvas = EsCustomElementCreate(instance->window, ES_CELL_FILL, ES_STYLE_PANEL_WINDOW_DIVIDER);
+			canvas->messageUser = (EsUICallback) CanvasMessage;
+			EsElementStartAnimating(canvas);
+		} else if (message->type == ES_MSG_INSTANCE_OPEN) {
+			size_t romBytes;
+			void *rom = EsFileStoreReadAll(message->instanceOpen.file, &romBytes);
+			EsInstanceOpenComplete(message, rom && Launch(rom, romBytes), NULL, 0);
+			EsHeapFree(rom, 0, NULL);
+		}
+	}
+}
diff --git a/ports/uxn/emulator.ini b/ports/uxn/emulator.ini
new file mode 100644
index 0000000..3cafc6e
--- /dev/null
+++ b/ports/uxn/emulator.ini
@@ -0,0 +1,15 @@
+[general]
+name=Uxn Emulator
+
+[build]
+source=ports/uxn/emulator.c
+compile_flags=-Wno-unknown-pragmas -Wno-unused-parameter
+
+[@handler]
+extension=uxn
+action=open
+
+[@file_type]
+extension=uxn
+name=Uxn ROM
+icon=icon_unknown
diff --git a/ports/uxn/port.sh b/ports/uxn/port.sh
new file mode 100755
index 0000000..e62c312
--- /dev/null
+++ b/ports/uxn/port.sh
@@ -0,0 +1,8 @@
+set -e
+rm -rf bin/uxn bin/noodle
+git clone --depth=1 https://git.sr.ht/~rabbits/uxn bin/uxn
+git clone --depth=1 https://git.sr.ht/~rabbits/noodle bin/noodle
+cc -DNDEBUG -Os -g0 -s bin/uxn/src/uxnasm.c -o bin/uxnasm
+bin/uxnasm bin/noodle/src/main.tal bin/noodle.rom
+echo > bin/uxn/src/devices/ppu.h
+x86_64-essence-gcc -DNDEBUG -Os -g0 -s ports/uxn/emulator.c -ffreestanding -nostdlib -lgcc -z max-page-size=0x1000 -o bin/uxnemu
diff --git a/util/api_table.ini b/util/api_table.ini
index 501df37..9e2b994 100644
--- a/util/api_table.ini
+++ b/util/api_table.ini
@@ -460,3 +460,4 @@ EsTextboxEnableSmartQuotes=458
 EsBufferWriteInt8=459
 EsInstanceGetStartupRequest=460
 EsImageDisplayPaint=461
+EsElementGetInsetBounds=462