环境
- Time 2023-08-22
- Zig 0.12.0-dev.161+6a5463951
- WSL-Ubuntu 22.04.3 LTS
前言
说明
参考资料：
- https://www.youtube.com/watch?v=nF_crEtmpBo
- https://github.com/howprice/sdl2-tetris
目标
扩大游戏的用户界面，增加其它的元素。
display.zig
const c = @import("c.zig");pub const WIDTH = 10;
pub const HEIGHT = 20;const FPS = 60;
const SCALE = 40; // 放大倍数
const BORDER = 2; // 边框pub const Screen = struct {line: usize = HEIGHT,buffer: [WIDTH][HEIGHT]u32 = undefined,window: *c.SDL_Window = undefined,renderer: *c.SDL_Renderer = undefined,pub fn init(self: *Screen) void {if (c.SDL_Init(c.SDL_INIT_EVERYTHING) < 0) c.sdlPanic();const center = c.SDL_WINDOWPOS_CENTERED;self.window = c.SDL_CreateWindow("俄罗斯方块", center, center, //700, 850, c.SDL_WINDOW_SHOWN) orelse c.sdlPanic();self.renderer = c.SDL_CreateRenderer(self.window, -1, 0) //orelse c.sdlPanic();}pub fn update(self: *Screen) void {_ = c.SDL_SetRenderDrawColor(self.renderer, 0x3b, 0x3b, 0x3b, 0xff);_ = c.SDL_RenderClear(self.renderer);for (0..WIDTH) |row| {for (0..HEIGHT) |col| {var color = self.buffer[row][col];if (color == 0) color = 0x404040ff;self.draw(row, col, color);}}}pub fn draw(self: *Screen, x: usize, y: usize, rgba: u32) void {const r: u8 = @truncate((rgba >> 24) & 0xff);const g: u8 = @truncate((rgba >> 16) & 0xff);const b: u8 = @truncate((rgba >> 8) & 0xff);const a: u8 = @truncate((rgba >> 0) & 0xff);_ = c.SDL_SetRenderDrawColor(self.renderer, r, g, b, a);const rect = c.SDL_Rect{.x = @intCast(x * SCALE + BORDER + 20),.y = @intCast(y * SCALE + BORDER + 20),.w = @intCast(SCALE - BORDER * 2),.h = @intCast(SCALE - BORDER * 2),};_ = c.SDL_RenderFillRect(self.renderer, &rect);}pub fn drawSolid(self: *Screen, x: usize, y: usize, rgba: u32) bool {self.draw(x, y, rgba);self.buffer[x][y] = rgba;self.line = @min(self.line, y);for (0..WIDTH) |row| {if (self.buffer[row][y] == 0) return false;}return self.clearRow(y);}fn clearRow(self: *Screen, col: usize) bool {var y = col;while (y >= self.line) : (y -= 1) {for (0..WIDTH) |x| {self.buffer[x][y] = self.buffer[x][y - 1];}}self.line += 1;return true;}pub fn hasSolid(self: *const Screen, x: usize, y: usize) bool {if (x >= WIDTH) return false;return y >= HEIGHT or self.buffer[x][y] != 0;}pub fn present(self: *Screen) void {c.SDL_RenderPresent(self.renderer);c.SDL_Delay(1000 / FPS);}pub fn deinit(self: *Screen) void {c.SDL_DestroyRenderer(self.renderer);c.SDL_DestroyWindow(self.window);c.SDL_Quit();}
};
调整了游戏的窗口大小，调整了游戏界面的边框和边距。
效果
总结
扩大用户界面，以便于增加其它的元素。