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- #pragma once
-
- #include <string.h>
- #include <stdint.h>
- #include <memory>
-
- #include "util.h"
- #include "common.h"
- #include "Tile.h"
-
- namespace Swan {
-
- class World;
- class Game;
-
- class Chunk {
- public:
- using RelPos = TilePos;
-
- static constexpr size_t DATA_SIZE =
- CHUNK_WIDTH * CHUNK_HEIGHT * sizeof(Tile::ID) + // Tiles
- CHUNK_WIDTH * CHUNK_HEIGHT; // Light levels
-
- // What does this chunk want the world gen to do after a tick?
- enum class TickAction {
- DEACTIVATE,
- DELETE,
- NOTHING,
- };
-
- Chunk(ChunkPos pos): pos_(pos) {
- data_.reset(new uint8_t[DATA_SIZE]);
- memset(getLightData(), 0, CHUNK_WIDTH * CHUNK_HEIGHT);
- }
-
- Tile::ID *getTileData() {
- assert(isActive());
- return (Tile::ID *)data_.get();
- }
-
- uint8_t *getLightData() {
- assert(isActive());
- return data_.get() + CHUNK_WIDTH * CHUNK_HEIGHT * sizeof(Tile::ID);
- }
-
- Tile::ID getTileID(RelPos pos) {
- return getTileData()[pos.y * CHUNK_WIDTH + pos.x];
- }
-
- void setTileID(RelPos pos, Tile::ID id, SDL_Texture *tex) {
- getTileData()[pos.y * CHUNK_WIDTH + pos.x] = id;
- drawList_.push_back({ pos, tex });
- }
-
- void setTileData(RelPos pos, Tile::ID id) {
- getTileData()[pos.y * CHUNK_WIDTH + pos.x] = id;
- needRender_ = true;
- }
-
- uint8_t getLightLevel(RelPos pos) {
- return getLightData()[pos.y * CHUNK_WIDTH + pos.x];
- }
-
- void setLightData(const uint8_t *data) {
- memcpy(getLightData(), data, CHUNK_WIDTH * CHUNK_HEIGHT);
- needLightRender_ = true;
- }
-
- void render(const Context &ctx, SDL_Renderer *rnd);
- void renderLight(const Context &ctx, SDL_Renderer *rnd);
-
- void compress();
- void decompress();
- void draw(const Context &ctx, Win &win);
- TickAction tick(float dt);
-
- bool isActive() { return deactivateTimer_ > 0; }
- void keepActive();
- void markModified() { isModified_ = true; }
-
- ChunkPos pos_;
-
- private:
- static constexpr float DEACTIVATE_INTERVAL = 20;
-
- void renderList(SDL_Renderer *rnd);
-
- bool isCompressed() { return compressedSize_ != -1; }
-
- std::unique_ptr<uint8_t[]> data_;
- std::vector<std::pair<RelPos, SDL_Texture *>> drawList_;
-
- ssize_t compressedSize_ = -1; // -1 if not compressed, a positive number if compressed
- bool needRender_ = false;
- bool needLightRender_ = false;
- float deactivateTimer_ = DEACTIVATE_INTERVAL;
- bool isModified_ = false;
-
- CPtr<SDL_Texture, SDL_DestroyTexture> texture_;
- CPtr<SDL_Texture, SDL_DestroyTexture> lightTexture_;
- };
-
- }
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