sorta kinda working on strings for cmenu. being lazy

cmenu/platform.h

@@ -4,6 +4,8 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+#include "utf.h"
+
 typedef struct Color {
 	uint8_t r, g, b;
 } Color;
@@ -22,23 +24,41 @@ typedef enum Key {
 	Count_Key
 } Key;
 
-typedef uint32_t CodePoint;
-
 bool KeyPressed(Key key);
 bool InputGetNextPrintable(CodePoint const *out_key);
 
+typedef struct Cell {
+	CodePoint character;
+	Color foreground;
+	Color background;
+} Cell;
+
 typedef struct Window {
-	int const width;
-	int const height;
-	CodePoint *characters;
-	Color *foreground;
-	Color *background;
+	int width;
+	int height;
+	Cell *cells;
 } Window;
 
-Window *WindowCreate();
+typedef struct PlatformState {
+	Window *prev;
+	Window *curr;
+} PlatformState;
+
+// Options for the backend. These options don't necessarily apply for all platforms.
+typedef struct PlatformOpts {
+	float window_width_fraction;  // decide the width  of the window as a fraction of the total resolution. for gui backends
+	float window_height_fraction; // decide the height of the window as a fraction of the total resolution. for gui backends
+} PlatformOpts;
+
+PlatformOpts WindowCreateOptsDefault();
+Window *WindowCreate(PlatformOpts opts);
 void WindowClear(Window *window, Color color);
 void WindowFlip(Window *window);
 
+void PlatformInit(PlatformOpts opts);
+int PlatformGetWidth();
+int PlatformGetHeight();
+
 // TODO: the platform layer would really update the keys being pressed, and
 // receive a diff in the form of actions. print this line from here and change
 // colors at these points.