add colour headers back

src/window/colour/colour32.h

@@ -0,0 +1,42 @@
+#pragma once
+#include <stdint.h>
+
+#include "SDL_render.h"
+
+// stores colour in a rgba format, each channel being a 8 bits wide.
+typedef union {
+    uint32_t packed;
+    struct {
+        uint8_t a;
+        uint8_t b;
+        uint8_t g;
+        uint8_t r;
+    };
+} colour32;
+
+#define COLOUR32_BLACK   ((colour32){0x000000FF})
+#define COLOUR32_RED     ((colour32){0xFF0000FF})
+#define COLOUR32_YELLOW  ((colour32){0xFFFF00FF})
+#define COLOUR32_ORANGE  ((colour32){0xFF6D00FF})
+#define COLOUR32_GREEN   ((colour32){0x00FF00FF})
+#define COLOUR32_CYAN    ((colour32){0x00FFFFFF})
+#define COLOUR32_BLUE    ((colour32){0x0000FFFF})
+#define COLOUR32_MAGENTA ((colour32){0xFF00FFFF})
+#define COLOUR32_WHITE   ((colour32){0xFFFFFFFF})
+
+// sets the render colour to a colour32 value
+static inline void set_colour32(SDL_Renderer* const renderer, colour32 const c) {
+    (void)SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, c.a);
+}
+
+// american macros:
+#define color32         colour32
+#define COLOR32_BLACK   COLOUR32_BLACK
+#define COLOR32_RED     COLOUR32_RED
+#define COLOR32_YELLOW  COLOUR32_YELLOW
+#define COLOR32_ORANGE  COLOUR32_ORANGE
+#define COLOR32_GREEN   COLOUR32_GREEN
+#define COLOR32_CYAN    COLOUR32_CYAN
+#define COLOR32_BLUE    COLOUR32_BLUE
+#define COLOR32_MAGENTA COLOUR32_MAGENTA
+#define COLOR32_WHITE   COLOUR32_WHITE

src/window/colour/colour8.h

@@ -0,0 +1,53 @@
+#pragma once
+#include <stdint.h>
+
+#include "SDL_render.h"
+
+// stores colour in a rrrgggbb format, which maps exactly to 8 bits
+typedef uint8_t colour8;
+
+/*                                         rrrg ggbb */
+#define COLOUR8_BLACK   ((colour8)0x00) // 0000 0000
+#define COLOUR8_RED     ((colour8)0xE0) // 1110 0000
+#define COLOUR8_YELLOW  ((colour8)0xFC) // 1111 1100
+#define COLOUR8_ORANGE  ((colour8)0xEC) // 1111 1100
+#define COLOUR8_GREEN   ((colour8)0x1C) // 0001 1100
+#define COLOUR8_CYAN    ((colour8)0x1F) // 0001 1111
+#define COLOUR8_BLUE    ((colour8)0x03) // 0000 0011
+#define COLOUR8_MAGENTA ((colour8)0xE3) // 1110 0011
+#define COLOUR8_WHITE   ((colour8)0xFF) // 1111 1111
+
+// gets the red channel in 32 bit colour space
+static inline uint8_t colour8_red32(colour8 const colour) {
+    return (colour >> 5) * (255 / 7);
+}
+
+// gets the green channel in 32 bit colour space
+static inline uint8_t colour8_green32(colour8 const colour) {
+    return ((colour >> 2) & 7) * (255 / 7);
+}
+
+// gets the blue channel in 32 bit colour space
+static inline uint8_t colour8_blue32(colour8 const colour) {
+    return (colour & 3) * (255 / 3);
+}
+
+// sets the render colour to a colour8 value
+static inline void set_colour8(SDL_Renderer* const renderer, colour8 const c) {
+    (void)SDL_SetRenderDrawColor(renderer, colour8_red32(c), colour8_green32(c), colour8_blue32(c), 0xFF);
+}
+
+// american macros:
+#define color8         colour8
+#define color8_red32   colour8_red32
+#define color8_green32 colour8_green32
+#define color8_blue32  colour8_blue32
+#define COLOR8_BLACK   COLOUR8_BLACK
+#define COLOR8_RED     COLOUR8_RED
+#define COLOR8_YELLOW  COLOUR8_YELLOW
+#define COLOR8_ORANGE  COLOUR8_ORANGE
+#define COLOR8_GREEN   COLOUR8_GREEN
+#define COLOR8_CYAN    COLOUR8_CYAN
+#define COLOR8_BLUE    COLOUR8_BLUE
+#define COLOR8_MAGENTA COLOUR8_MAGENTA
+#define COLOR8_WHITE   COLOUR8_WHITE