Added background image, TTF loading, rgb color struct

src/text.zig

@@ -0,0 +1,84 @@
+const sdl = @import("./sdl.zig").c;
+const std = @import("std");
+const GameState = @import("./game_state.zig").GameState;
+
+var font: ?*sdl.TTF_Font = null;
+var text_texture: ?*sdl.SDL_Texture = null;
+var text_init = false;
+
+pub const GameText = struct {
+    text: []const u8,
+    color: sdl.SDL_Color,
+    surface: *sdl.SDL_Surface,
+    w: u32,
+    h: u32,
+
+    pub fn loadFromRenderedText(text: []const u8, color: sdl.SDL_Color) !GameText {
+        const c_text: [*c]const u8 = @ptrCast(text);
+        const text_surface: [*c]sdl.SDL_Surface = sdl.TTF_RenderText_Solid(font.?, c_text, color) orelse {
+            sdl.SDL_Log("Error loading text surface: %s\n", sdl.SDL_GetError());
+            return error.FailedToRenderSurface;
+        };
+
+        return .{
+            .surface = text_surface,
+            .text = text,
+            .color = color,
+            .w = @intCast(text_surface.*.w),
+            .h = @intCast(text_surface.*.h),
+        };
+    }
+
+    pub fn deinit(self: *GameText) void {
+        sdl.SDL_FreeSurface(self.text_surface);
+    }
+
+    pub fn setBlendMode(self: *GameText, blend: sdl.SDL_BlendMode) !void {
+        _ = self;
+        _ = blend;
+        return error.Unimplemented;
+    }
+
+    pub fn setAlpha(self: *GameText, alpha: u8) !void {
+        _ = self;
+        _ = alpha;
+        return error.Unimplemented;
+    }
+
+    pub fn render(self: *GameText, game_state: *GameState) !void {
+        if (!text_init) {
+            return error.TextNotInitialized;
+        }
+
+        if (text_texture != null) {
+            sdl.SDL_DestroyTexture(text_texture);
+            text_texture = null;
+        }
+
+        // TODO dont create new texture if unchanged
+        text_texture = sdl.SDL_CreateTextureFromSurface(game_state.renderer, self.surface) orelse {
+            sdl.SDL_Log("Error loading text texture: %s\n", sdl.SDL_GetError());
+            return error.FailedToRenderTexture;
+        };
+
+        const srcr = sdl.SDL_Rect{ .x = 0, .y = 0, .w = @intCast(self.w), .h = @intCast(self.h) };
+        const destr = sdl.SDL_Rect{ .x = @intCast(game_state.SCREEN_WIDTH - self.w), .y = 10, .w = @intCast(self.w), .h = @intCast(self.h) };
+        _ = sdl.SDL_RenderCopy(game_state.renderer, text_texture, &srcr, &destr);
+    }
+
+    pub fn initFont() !void {
+        const loaded_font = sdl.TTF_OpenFont("./assets/fonts/DepartureMonoNF-Regular.ttf", 24) orelse {
+            sdl.SDL_Log("Error loading ttf font: %s\n", sdl.TTF_GetError());
+            return error.FailedToLoadFont;
+        };
+
+        font = loaded_font;
+        text_init = true;
+    }
+
+    pub fn deinitFont() void {
+        sdl.SDL_DestroyTexture(text_texture);
+        sdl.TTF_CloseFont(font);
+        text_init = false;
+    }
+};