Add initial theming support

1 files changed, 43 insertions, 9 deletions

diff --git a/src/renderer_m0.c b/src/renderer_m0.c
index eb19718..9373b73 100644
--- a/src/renderer_m0.c
+++ b/src/renderer_m0.c
@@ -782,6 +782,48 @@ txt_drawc_small(char c, size_t x, size_t y, u8 clr) {
 // Initialization.
 //
 
+Palette themes[] = {
+    {
+        COLOR_BLACK,       // BG
+        COLOR_WHITE,       // FG
+        COLOR_BLUE,        // ACC_0
+        COLOR_RED,         // ACC_1
+        COLOR_CYAN,        // ACC_2
+        COLOR_GREY,        // COL_OFF
+    },
+    {
+        RGB15(31, 31, 31), // BG
+        RGB15( 8,  8,  8), // FG
+        RGB15( 2, 17, 31), // ACC_0
+        RGB15(31,  0, 10), // ACC_1
+        RGB15( 0, 27, 30), // ACC_2
+        RGB15(16, 17, 19), // COL_OFF
+    },
+    {
+        RGB15( 0,  0, 31), // BG
+        RGB15(31, 31, 31), // FG
+        RGB15( 0, 31, 14), // ACC_0
+        RGB15(24,  7, 19), // ACC_1
+        RGB15(31, 17, 27), // ACC_2
+        RGB15(22, 22, 31), // COL_OFF
+    },
+    {
+        RGB15(11, 24, 31), // BG
+        RGB15(31, 31, 31), // FG
+        RGB15(8,  17, 22), // COL_OFF
+        RGB15(29, 17, 22), // ACC_1
+        RGB15(29, 17, 22), // ACC_1
+        RGB15(25, 27, 29), // COL_OFF
+    },
+};
+
+void
+swap_palette(int idx) {
+    for (size_t i = 0; i < 16; i++) {
+        PAL_BUFFER_BG[i] = themes[idx][i];
+    }
+}
+
 void
 renderer_init(void) {
     // Initialize display mode and bg palette.
@@ -815,15 +857,7 @@ renderer_init(void) {
     BG_H_SCROLL_1 = -240;
 
     // Initialize default palette.
-    PAL_BUFFER_BG[0] = COLOR_BLACK;
-    PAL_BUFFER_BG[1] = COLOR_WHITE;
-    PAL_BUFFER_BG[2] = COLOR_RED;
-    PAL_BUFFER_BG[3] = COLOR_BLUE;
-    PAL_BUFFER_BG[4] = COLOR_CYAN;
-    PAL_BUFFER_BG[5] = COLOR_GREY;
-    PAL_BUFFER_BG[6] = COLOR_WHITE;
-    PAL_BUFFER_BG[7] = COLOR_GREEN;
-    PAL_BUFFER_BG[8] = COLOR_PURPLE;
+    swap_palette(0);
 
     // Initialize text engine.
     txt_init(txt_drawc);