From cf2e6bf382af67d8b0261af326926894bf59d849 Mon Sep 17 00:00:00 2001
From: Dominic Masters <dominic@domsplace.com>
Date: Mon, 6 Oct 2025 19:18:30 -0500
Subject: [PATCH] cmd screen

---
 src/console/cmd/cmdscreen.h | 78 +++++++++++++++++++++++++++++++++++++
 src/util/string.c           | 14 +++++++
 src/util/string.h           |  9 +++++
 3 files changed, 101 insertions(+)

diff --git a/src/console/cmd/cmdscreen.h b/src/console/cmd/cmdscreen.h
index de2a173..1216533 100644
--- a/src/console/cmd/cmdscreen.h
+++ b/src/console/cmd/cmdscreen.h
@@ -8,6 +8,7 @@
 #pragma once
 #include "console/console.h"
 #include "display/screen.h"
+#include "util/string.h"
 
 void cmdScreen(const consolecmdexec_t *exec) {
   if(exec->argc < 1) {
@@ -19,4 +20,81 @@ void cmdScreen(const consolecmdexec_t *exec) {
     SCREEN.mode = SCREEN_MODE_BACKBUFFER;
     return;
   }
+
+  #if DISPLAY_SIZE_DYNAMIC == 1
+    if(strcmp(exec->argv[0], "fixed") == 0) {
+      if(exec->argc < 3) {
+        consolePrint("Expected 3 arguments: fixed <width> <height>");
+        return;
+      }
+
+      int32_t w, h;
+      if(!stringToI32(exec->argv[1], &w) || w <= 0) {
+        consolePrint("Invalid width: %s", exec->argv[1]);
+        return;
+      }
+      if(!stringToI32(exec->argv[2], &h) || h <= 0) {
+        consolePrint("Invalid height: %s", exec->argv[2]);
+        return;
+      }
+
+      SCREEN.mode = SCREEN_MODE_FIXED_SIZE;
+      SCREEN.fixedSize.width = w;
+      SCREEN.fixedSize.height = h;
+      return;
+    }
+
+    if(strcmp(exec->argv[0], "aspect") == 0) {
+      if(exec->argc < 2) {
+        consolePrint("Expected 2 arguments: aspect <size>");
+        return;
+      }
+
+      float_t r;
+      if(!stringToF32(exec->argv[1], &r) || r <= 0) {
+        consolePrint("Invalid aspect ratio: %s", exec->argv[1]);
+        return;
+      }
+
+      SCREEN.mode = SCREEN_MODE_ASPECT_RATIO;
+      SCREEN.aspectRatio.ratio = r;
+      return;
+    }
+
+    if(strcmp(exec->argv[0], "height") == 0) {
+      if(exec->argc < 2) {
+        consolePrint("Expected 2 arguments: height <size>");
+        return;
+      }
+
+      int32_t h;
+      if(!stringToI32(exec->argv[1], &h) || h <= 0) {
+        consolePrint("Invalid height: %s", exec->argv[1]);
+        return;
+      }
+
+      SCREEN.mode = SCREEN_MODE_FIXED_HEIGHT;
+      SCREEN.fixedHeight.height = h;
+      return;
+    }
+
+    if(strcmp(exec->argv[0], "width") == 0) {
+      if(exec->argc < 2) {
+        consolePrint("Expected 2 arguments: width <size>");
+        return;
+      }
+
+      int32_t w;
+      if(!stringToI32(exec->argv[1], &w) || w <= 0) {
+        consolePrint("Invalid width: %s", exec->argv[1]);
+        return;
+      }
+
+      SCREEN.mode = SCREEN_MODE_FIXED_WIDTH;
+      SCREEN.fixedWidth.width = w;
+      return;
+    }
+  #endif
+
+  consolePrint("Unknown mode: %s", exec->argv[0]);
 }
\ No newline at end of file
diff --git a/src/util/string.c b/src/util/string.c
index e250911..76be012 100644
--- a/src/util/string.c
+++ b/src/util/string.c
@@ -133,6 +133,20 @@ bool_t stringToU16(const char_t *str, uint16_t *out) {
   return true;
 }
 
+bool_t stringToF32(const char_t *str, float_t *out) {
+  assertNotNull(str, "str must not be NULL");
+  assertNotNull(out, "out must not be NULL");
+
+  char_t *endptr;
+  errno = 0;
+  float_t result = strtof(str, &endptr);
+  if (errno != 0 || *endptr != '\0') {
+    return false;
+  }
+  *out = result;
+  return true;
+}
+
 bool_t stringEndsWith(const char_t *str, const char_t *suffix) {
   assertNotNull(str, "str must not be NULL");
   assertNotNull(suffix, "suffix must not be NULL");
diff --git a/src/util/string.h b/src/util/string.h
index 25a369c..189e5a6 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -127,6 +127,15 @@ bool_t stringToI16(const char_t *str, int16_t *out);
  */
 bool_t stringToU16(const char_t *str, uint16_t *out);
 
+/**
+ * Converts a string to a float.
+ * 
+ * @param str The string to convert.
+ * @param out The output float.
+ * @return TRUE if the conversion was successful, FALSE otherwise.
+ */
+bool_t stringToF32(const char_t *str, float_t *out);
+
 /**
  * Determines if a string ends with a specified suffix.
  *