improve sw renderer

src/gui/pxl8_gui_palette.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "pxl8_types.h"
+
+#define PXL8_UI_PALETTE_SIZE 16
+
+#define PXL8_UI_BG0        0
+#define PXL8_UI_BG1        1
+#define PXL8_UI_BG2        2
+#define PXL8_UI_BG3        3
+#define PXL8_UI_FG0        4
+#define PXL8_UI_FG1        5
+#define PXL8_UI_FG2        6
+#define PXL8_UI_FG3        7
+#define PXL8_UI_RED        8
+#define PXL8_UI_GREEN      9
+#define PXL8_UI_YELLOW     10
+#define PXL8_UI_BLUE       11
+#define PXL8_UI_PURPLE     12
+#define PXL8_UI_AQUA       13
+#define PXL8_UI_ORANGE     14
+#define PXL8_UI_GRAY       15
+
+static const u32 pxl8_ui_palette[PXL8_UI_PALETTE_SIZE] = {
+    0xFF282828,
+    0xFF3c3836,
+    0xFF504945,
+    0xFF665c54,
+    0xFFc7f1fb,
+    0xFFb2dbeb,
+    0xFFa1c4d5,
+    0xFF93aebd,
+    0xFF3449fb,
+    0xFF26bbb8,
+    0xFF2fbdfa,
+    0xFF98a583,
+    0xFF9b86d3,
+    0xFF7cc08e,
+    0xFF1980fe,
+    0xFF928374,
+};