add networking, 3d improvements, reorganize src structure

src/gfx/pxl8_colormap.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "pxl8_dither.h"
+#include "pxl8_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define PXL8_LIGHT_LEVELS 64
+#define PXL8_COLORMAP_SIZE (256 * PXL8_LIGHT_LEVELS)
+
+#define PXL8_FULLBRIGHT_START 240
+#define PXL8_TRANSPARENT 0
+#define PXL8_DYNAMIC_RANGE_START 144
+#define PXL8_DYNAMIC_RANGE_COUNT 16
+
+typedef struct {
+    u8 table[PXL8_COLORMAP_SIZE];
+} pxl8_colormap;
+
+typedef struct {
+    u8 dark_r, dark_g, dark_b;
+    u8 tint_r, tint_g, tint_b;
+    f32 tint_strength;
+} pxl8_level_tint;
+
+void pxl8_colormap_generate(pxl8_colormap* cm, const u32* palette, const pxl8_level_tint* tint);
+
+static inline u8 pxl8_colormap_lookup(const pxl8_colormap* cm, u8 pal_idx, u8 light) {
+    u32 light_idx = light >> 2;
+    return cm->table[light_idx * 256 + pal_idx];
+}
+
+static inline u8 pxl8_colormap_lookup_dithered(const pxl8_colormap* cm, u8 pal_idx, u8 light, u32 x, u32 y) {
+    u8 dithered = pxl8_dither_light(light, x, y);
+    u32 light_idx = dithered >> 2;
+    return cm->table[light_idx * 256 + pal_idx];
+}
+
+#ifdef __cplusplus
+}
+#endif