543 lines
14 KiB
V
543 lines
14 KiB
V
// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
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module gg
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import os
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import os.font
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import gx
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import sokol
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import sokol.sapp
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import sokol.sgl
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import sokol.gfx
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$if windows {
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#flag -lgdi32
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#include "windows.h"
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}
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// call Windows API to get screen size
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fn C.GetSystemMetrics(int) int
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// fn C.WaitMessage()
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pub type TouchPoint = C.sapp_touchpoint
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pub struct Event {
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pub mut:
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frame_count u64
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typ sapp.EventType
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key_code KeyCode
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char_code u32
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key_repeat bool
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modifiers u32
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mouse_button MouseButton
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mouse_x f32
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mouse_y f32
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mouse_dx f32
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mouse_dy f32
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scroll_x f32
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scroll_y f32
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num_touches int
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touches [8]TouchPoint
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window_width int
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window_height int
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framebuffer_width int
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framebuffer_height int
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}
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pub struct Config {
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pub:
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width int
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height int
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use_ortho bool // unused, still here just for backwards compatibility
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retina bool
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resizable bool
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user_data voidptr
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font_size int
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create_window bool
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// window_user_ptr voidptr
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window_title string
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borderless_window bool
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always_on_top bool
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bg_color gx.Color
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init_fn FNCb = voidptr(0)
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frame_fn FNCb = voidptr(0)
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native_frame_fn FNCb = voidptr(0)
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cleanup_fn FNCb = voidptr(0)
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fail_fn FNFail = voidptr(0)
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//
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event_fn FNEvent = voidptr(0)
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quit_fn FNEvent = voidptr(0)
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//
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keydown_fn FNKeyDown = voidptr(0)
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keyup_fn FNKeyUp = voidptr(0)
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char_fn FNChar = voidptr(0)
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//
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move_fn FNMove = voidptr(0)
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click_fn FNClick = voidptr(0)
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unclick_fn FNUnClick = voidptr(0)
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leave_fn FNEvent = voidptr(0)
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enter_fn FNEvent = voidptr(0)
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resized_fn FNEvent = voidptr(0)
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scroll_fn FNEvent = voidptr(0)
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// wait_events bool // set this to true for UIs, to save power
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fullscreen bool
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scale f32 = 1.0
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sample_count int
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swap_interval int = 1 // 1 = 60fps, 2 = 30fps etc. The preferred swap interval (ignored on some platforms)
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// ved needs this
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// init_text bool
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font_path string
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custom_bold_font_path string
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ui_mode bool // refreshes only on events to save CPU usage
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// font bytes for embedding
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font_bytes_normal []byte
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font_bytes_bold []byte
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font_bytes_mono []byte
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font_bytes_italic []byte
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native_rendering bool // Cocoa on macOS/iOS, GDI+ on Windows
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// drag&drop
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enable_dragndrop bool // enable file dropping (drag'n'drop), default is false
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max_dropped_files int = 1 // max number of dropped files to process (default: 1)
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max_dropped_file_path_length int = 2048 // max length in bytes of a dropped UTF-8 file path (default: 2048)
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}
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[heap]
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pub struct Context {
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mut:
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render_text bool = true
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// a cache with all images created by the user. used for sokol image init and to save space
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// (so that the user can store image ids, not entire Image objects)
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image_cache []Image
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needs_refresh bool = true
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ticks int // for ui mode only
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pub:
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native_rendering bool
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pub mut:
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scale f32 = 1.0 // will get set to 2.0 for retina, will remain 1.0 for normal
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width int
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height int
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clear_pass gfx.PassAction
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window sapp.Desc
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timage_pip sgl.Pipeline
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config Config
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user_data voidptr
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ft &FT
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font_inited bool
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ui_mode bool // do not redraw everything 60 times/second, but only when the user requests
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frame u64 // the current frame counted from the start of the application; always increasing
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//
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mbtn_mask byte
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mouse_buttons MouseButtons // typed version of mbtn_mask; easier to use for user programs
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mouse_pos_x int
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mouse_pos_y int
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mouse_dx int
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mouse_dy int
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scroll_x int
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scroll_y int
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//
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key_modifiers Modifier // the current key modifiers
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key_repeat bool // whether the pressed key was an autorepeated one
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pressed_keys [key_code_max]bool // an array representing all currently pressed keys
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pressed_keys_edge [key_code_max]bool // true when the previous state of pressed_keys,
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// *before* the current event was different
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}
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fn gg_init_sokol_window(user_data voidptr) {
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mut g := unsafe { &Context(user_data) }
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desc := sapp.create_desc()
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/*
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desc := gfx.Desc{
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mtl_device: sapp.metal_get_device()
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mtl_renderpass_descriptor_cb: sapp.metal_get_renderpass_descriptor
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mtl_drawable_cb: sapp.metal_get_drawable
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d3d11_device: sapp.d3d11_get_device()
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d3d11_device_context: sapp.d3d11_get_device_context()
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d3d11_render_target_view_cb: sapp.d3d11_get_render_target_view
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d3d11_depth_stencil_view_cb: sapp.d3d11_get_depth_stencil_view
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}
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*/
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gfx.setup(&desc)
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sgl_desc := sgl.Desc{}
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sgl.setup(&sgl_desc)
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g.scale = dpi_scale()
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// is_high_dpi := sapp.high_dpi()
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// fb_w := sapp.width()
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// fb_h := sapp.height()
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// println('g.scale=$g.scale is_high_dpi=$is_high_dpi fb_w=$fb_w fb_h=$fb_h')
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// if g.config.init_text {
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// `os.is_file()` won't work on Android if the font file is embedded into the APK
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exists := $if !android { os.is_file(g.config.font_path) } $else { true }
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if g.config.font_path != '' && !exists {
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g.render_text = false
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} else if g.config.font_path != '' && exists {
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// t := time.ticks()
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g.ft = new_ft(
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font_path: g.config.font_path
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custom_bold_font_path: g.config.custom_bold_font_path
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scale: dpi_scale()
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) or { panic(err) }
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// println('FT took ${time.ticks()-t} ms')
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g.font_inited = true
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} else {
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if g.config.font_bytes_normal.len > 0 {
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g.ft = new_ft(
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bytes_normal: g.config.font_bytes_normal
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bytes_bold: g.config.font_bytes_bold
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bytes_mono: g.config.font_bytes_mono
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bytes_italic: g.config.font_bytes_italic
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scale: sapp.dpi_scale()
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) or { panic(err) }
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g.font_inited = true
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} else {
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sfont := font.default()
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if g.config.font_path != '' {
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eprintln('font file "$g.config.font_path" does not exist, the system font ($sfont) was used instead.')
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}
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g.ft = new_ft(
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font_path: sfont
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custom_bold_font_path: g.config.custom_bold_font_path
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scale: sapp.dpi_scale()
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) or { panic(err) }
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g.font_inited = true
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}
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}
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//
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mut pipdesc := gfx.PipelineDesc{
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label: c'alpha_image'
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}
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unsafe { vmemset(&pipdesc, 0, int(sizeof(pipdesc))) }
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color_state := gfx.ColorState{
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blend: gfx.BlendState{
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enabled: true
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src_factor_rgb: .src_alpha
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dst_factor_rgb: .one_minus_src_alpha
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}
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}
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pipdesc.colors[0] = color_state
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g.timage_pip = sgl.make_pipeline(&pipdesc)
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//
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if g.config.init_fn != voidptr(0) {
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g.config.init_fn(g.user_data)
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}
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// Create images now that we can do that after sg is inited
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if g.native_rendering {
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return
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}
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for i in 0 .. g.image_cache.len {
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if g.image_cache[i].simg.id == 0 {
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g.image_cache[i].init_sokol_image()
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}
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}
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}
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fn gg_frame_fn(user_data voidptr) {
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mut ctx := unsafe { &Context(user_data) }
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ctx.frame++
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if ctx.config.frame_fn == voidptr(0) {
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return
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}
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if ctx.native_rendering {
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// return
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}
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ctx.record_frame()
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if ctx.ui_mode && !ctx.needs_refresh {
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// Draw 3 more frames after the "stop refresh" command
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ctx.ticks++
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if ctx.ticks > 3 {
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return
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}
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}
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ctx.config.frame_fn(ctx.user_data)
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ctx.needs_refresh = false
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}
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fn gg_event_fn(ce voidptr, user_data voidptr) {
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// e := unsafe { &sapp.Event(ce) }
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mut e := unsafe { &Event(ce) }
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mut g := unsafe { &Context(user_data) }
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if g.ui_mode {
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g.refresh_ui()
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}
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if e.typ == .mouse_down {
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bitplace := int(e.mouse_button)
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g.mbtn_mask |= byte(1 << bitplace)
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g.mouse_buttons = MouseButtons(g.mbtn_mask)
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}
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if e.typ == .mouse_up {
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bitplace := int(e.mouse_button)
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g.mbtn_mask &= ~(byte(1 << bitplace))
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g.mouse_buttons = MouseButtons(g.mbtn_mask)
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}
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if e.typ == .mouse_move && e.mouse_button == .invalid {
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if g.mbtn_mask & 0x01 > 0 {
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e.mouse_button = .left
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}
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if g.mbtn_mask & 0x02 > 0 {
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e.mouse_button = .right
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}
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if g.mbtn_mask & 0x04 > 0 {
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e.mouse_button = .middle
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}
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}
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g.mouse_pos_x = int(e.mouse_x / g.scale)
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g.mouse_pos_y = int(e.mouse_y / g.scale)
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g.mouse_dx = int(e.mouse_dx / g.scale)
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g.mouse_dy = int(e.mouse_dy / g.scale)
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g.scroll_x = int(e.scroll_x / g.scale)
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g.scroll_y = int(e.scroll_y / g.scale)
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g.key_modifiers = Modifier(e.modifiers)
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g.key_repeat = e.key_repeat
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if e.typ in [.key_down, .key_up] {
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key_idx := int(e.key_code) % key_code_max
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prev := g.pressed_keys[key_idx]
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next := e.typ == .key_down
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g.pressed_keys[key_idx] = next
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g.pressed_keys_edge[key_idx] = prev != next
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}
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if g.config.event_fn != voidptr(0) {
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g.config.event_fn(e, g.config.user_data)
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}
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match e.typ {
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.mouse_move {
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if g.config.move_fn != voidptr(0) {
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g.config.move_fn(e.mouse_x / g.scale, e.mouse_y / g.scale, g.config.user_data)
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}
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}
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.mouse_down {
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if g.config.click_fn != voidptr(0) {
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g.config.click_fn(e.mouse_x / g.scale, e.mouse_y / g.scale, e.mouse_button,
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g.config.user_data)
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}
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}
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.mouse_up {
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if g.config.unclick_fn != voidptr(0) {
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g.config.unclick_fn(e.mouse_x / g.scale, e.mouse_y / g.scale, e.mouse_button,
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g.config.user_data)
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}
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}
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.mouse_leave {
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if g.config.leave_fn != voidptr(0) {
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g.config.leave_fn(e, g.config.user_data)
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}
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}
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.mouse_enter {
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if g.config.enter_fn != voidptr(0) {
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g.config.enter_fn(e, g.config.user_data)
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}
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}
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.mouse_scroll {
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if g.config.scroll_fn != voidptr(0) {
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g.config.scroll_fn(e, g.config.user_data)
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}
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}
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.key_down {
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if g.config.keydown_fn != voidptr(0) {
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g.config.keydown_fn(e.key_code, Modifier(e.modifiers), g.config.user_data)
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}
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}
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.key_up {
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if g.config.keyup_fn != voidptr(0) {
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g.config.keyup_fn(e.key_code, Modifier(e.modifiers), g.config.user_data)
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}
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}
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.char {
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if g.config.char_fn != voidptr(0) {
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g.config.char_fn(e.char_code, g.config.user_data)
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}
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}
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.resized {
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if g.config.resized_fn != voidptr(0) {
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g.config.resized_fn(e, g.config.user_data)
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}
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}
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.quit_requested {
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if g.config.quit_fn != voidptr(0) {
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g.config.quit_fn(e, g.config.user_data)
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}
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}
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else {
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// dump(e)
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}
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}
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}
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fn gg_cleanup_fn(user_data voidptr) {
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mut g := unsafe { &Context(user_data) }
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if g.config.cleanup_fn != voidptr(0) {
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g.config.cleanup_fn(g.config.user_data)
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}
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gfx.shutdown()
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}
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fn gg_fail_fn(msg &char, user_data voidptr) {
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mut g := unsafe { &Context(user_data) }
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vmsg := unsafe { tos3(msg) }
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if g.config.fail_fn != voidptr(0) {
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g.config.fail_fn(vmsg, g.config.user_data)
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} else {
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eprintln('gg error: $vmsg')
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}
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}
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//---- public methods
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//
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pub fn new_context(cfg Config) &Context {
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mut g := &Context{
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user_data: cfg.user_data
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width: cfg.width
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height: cfg.height
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config: cfg
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ft: 0
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ui_mode: cfg.ui_mode
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native_rendering: cfg.native_rendering
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}
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if isnil(cfg.user_data) {
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g.user_data = g
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}
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g.set_bg_color(cfg.bg_color)
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// C.printf('new_context() %p\n', cfg.user_data)
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window := sapp.Desc{
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user_data: g
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init_userdata_cb: gg_init_sokol_window
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frame_userdata_cb: gg_frame_fn
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event_userdata_cb: gg_event_fn
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fail_userdata_cb: gg_fail_fn
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cleanup_userdata_cb: gg_cleanup_fn
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window_title: &char(cfg.window_title.str)
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html5_canvas_name: &char(cfg.window_title.str)
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width: cfg.width
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height: cfg.height
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sample_count: cfg.sample_count
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high_dpi: true
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fullscreen: cfg.fullscreen
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__v_native_render: cfg.native_rendering
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// drag&drop
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enable_dragndrop: cfg.enable_dragndrop
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max_dropped_files: cfg.max_dropped_files
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max_dropped_file_path_length: cfg.max_dropped_file_path_length
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swap_interval: cfg.swap_interval
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}
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g.window = window
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return g
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}
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pub fn (ctx &Context) run() {
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sapp.run(&ctx.window)
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}
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// quit closes the context window and exits the event loop for it
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pub fn (ctx &Context) quit() {
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sapp.request_quit() // does not require ctx right now, but sokol multi-window might in the future
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}
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pub fn (mut ctx Context) set_bg_color(c gx.Color) {
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ctx.clear_pass = gfx.create_clear_pass(f32(c.r) / 255.0, f32(c.g) / 255.0, f32(c.b) / 255.0,
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f32(c.a) / 255.0)
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}
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// Resize the context's Window
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pub fn (mut ctx Context) resize(width int, height int) {
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ctx.width = width
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ctx.height = height
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}
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pub fn (mut ctx Context) refresh_ui() {
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ctx.needs_refresh = true
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ctx.ticks = 0
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}
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// Prepares the context for drawing
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pub fn (gg &Context) begin() {
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if gg.render_text && gg.font_inited {
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gg.ft.flush()
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}
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sgl.defaults()
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sgl.matrix_mode_projection()
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sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0)
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}
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// Finishes drawing for the context
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pub fn (gg &Context) end() {
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gfx.begin_default_pass(gg.clear_pass, sapp.width(), sapp.height())
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sgl.draw()
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gfx.end_pass()
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gfx.commit()
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/*
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if gg.config.wait_events {
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// println('gg: waiting')
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wait_events()
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}
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*/
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}
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//---- public module functions
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// dpi_scale returns the DPI scale coefficient for the screen
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pub fn dpi_scale() f32 {
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mut s := sapp.dpi_scale()
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$if android {
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s *= android_dpi_scale()
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}
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// NB: on older X11, `Xft.dpi` from ~/.Xresources, that sokol uses,
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// may not be set which leads to sapp.dpi_scale reporting incorrectly 0.0
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if s < 0.1 {
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s = 1.0
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}
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return s
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}
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pub fn high_dpi() bool {
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|
return C.sapp_high_dpi()
|
|
}
|
|
|
|
pub fn screen_size() Size {
|
|
$if macos {
|
|
return C.gg_get_screen_size()
|
|
}
|
|
$if windows {
|
|
return Size{
|
|
width: int(C.GetSystemMetrics(C.SM_CXSCREEN))
|
|
height: int(C.GetSystemMetrics(C.SM_CYSCREEN))
|
|
}
|
|
}
|
|
// TODO linux, etc
|
|
return Size{}
|
|
}
|
|
|
|
// window_size returns the `Size` of the active window
|
|
pub fn window_size() Size {
|
|
s := dpi_scale()
|
|
return Size{int(sapp.width() / s), int(sapp.height() / s)}
|
|
}
|
|
|
|
// window_size_real_pixels returns the `Size` of the active window without scale
|
|
pub fn window_size_real_pixels() Size {
|
|
return Size{sapp.width(), sapp.height()}
|
|
}
|
|
|
|
/*
|
|
pub fn wait_events() {
|
|
unsafe {
|
|
$if macos {
|
|
#NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny
|
|
#untilDate:[NSDate distantFuture]
|
|
#inMode:NSDefaultRunLoopMode
|
|
#dequeue:YES];
|
|
#[NSApp sendEvent:event];
|
|
}
|
|
$if windows {
|
|
C.WaitMessage()
|
|
}
|
|
}
|
|
}
|
|
*/
|