53 lines
2.0 KiB
Zig
53 lines
2.0 KiB
Zig
// # pin_image
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// zig version 0.16.0
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// depends on libSDL2, LibSDL2_image
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// build zig build-exe pin_image.zig -lc -lSDL2 -lSDL2_image
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// example usage:
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// $ grim -g "$(slurp)" - | ./pin_image
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// $ cat image.png | pin_image
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// supports png and jpg
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const std = @import("std");
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const c = @cImport({
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@cInclude("SDL2/SDL.h");
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@cInclude("SDL2/SDL_image.h");
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});
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pub fn main(init: std.process.Init) !void {
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var buf: [1024]u8 = undefined;
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var reader = std.Io.File.Reader.init(std.Io.File.stdin(), init.io, &buf);
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const data = try reader.interface.allocRemaining(init.gpa, .unlimited);
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defer init.gpa.free(data);
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if (c.SDL_Init(c.SDL_INIT_VIDEO) != 0) return error.Init;
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defer c.SDL_Quit();
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const image_flags = c.IMG_INIT_PNG | c.IMG_INIT_JPG;
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if ((c.IMG_Init(image_flags) & image_flags) != image_flags) return error.ImageInit;
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defer c.IMG_Quit();
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const rw = c.SDL_RWFromMem(data.ptr, @intCast(data.len)) orelse return error.RWFromMem;
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const surface: *c.SDL_Surface = c.IMG_Load_RW(rw, 1) orelse return error.ImageLoad;
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defer c.SDL_FreeSurface(surface);
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const window = c.SDL_CreateWindow("stdin image", c.SDL_WINDOWPOS_CENTERED, c.SDL_WINDOWPOS_CENTERED, surface.w, surface.h, c.SDL_WINDOW_SHOWN | c.SDL_WINDOW_RESIZABLE) orelse return error.WindowCreate;
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defer c.SDL_DestroyWindow(window);
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const renderer = c.SDL_CreateRenderer(window, -1, c.SDL_RENDERER_ACCELERATED | c.SDL_RENDERER_PRESENTVSYNC) orelse return error.RendererCreate;
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defer c.SDL_DestroyRenderer(renderer);
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const texture = c.SDL_CreateTextureFromSurface(renderer, surface) orelse return error.TextureCreate;
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defer c.SDL_DestroyTexture(texture);
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var running = true;
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while (running) {
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var event: c.SDL_Event = undefined;
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while (c.SDL_PollEvent(&event) != 0) {
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if (event.type == c.SDL_QUIT) {
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running = false;
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}
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}
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_ = c.SDL_RenderClear(renderer);
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_ = c.SDL_RenderCopy(renderer, texture, null, null);
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_ = c.SDL_RenderPresent(renderer);
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}
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}
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