import sokol import sokol.sapp import sokol.gfx import sokol.sgl struct AppState { pass_action C.sg_pass_action } const ( used_import = sokol.used_import ) fn main() { state := &AppState{ pass_action: gfx.create_clear_pass(0.1, 0.1, 0.1, 1.0) } title := 'Sokol Drawing Template' desc := sapp.Desc{ user_data: state init_userdata_cb: init frame_userdata_cb: frame window_title: title.str html5_canvas_name: title.str } sapp.run(&desc) } fn init(user_data voidptr) { desc := sapp.create_desc() // C.sg_desc{ gfx.setup(&desc) sgl_desc := C.sgl_desc_t{} sgl.setup(&sgl_desc) } fn frame(user_data voidptr) { // println('frame') state := &AppState(user_data) draw() gfx.begin_default_pass(&state.pass_action, sapp.width(), sapp.height()) sgl.draw() gfx.end_pass() gfx.commit() } fn draw() { // first, reset and setup ortho projection sgl.defaults() sgl.matrix_mode_projection() sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0) sgl.c4b(255, 0, 0, 128) draw_hollow_rect(10, 10, 100, 30) sgl.c4b(25, 150, 0, 128) draw_filled_rect(10, 150, 80, 40) // line(0, 0, 500, 500) } fn draw_hollow_rect(x f32, y f32, w f32, h f32) { sgl.begin_line_strip() sgl.v2f(x, y) sgl.v2f(x + w, y) sgl.v2f(x + w, y + h) sgl.v2f(x, y + h) sgl.v2f(x, y) sgl.end() } fn draw_filled_rect(x f32, y f32, w f32, h f32) { sgl.begin_quads() sgl.v2f(x, y) sgl.v2f(x + w, y) sgl.v2f(x + w, y + h) sgl.v2f(x, y + h) sgl.end() }