module ui

import gg

pub struct DrawDeviceContext {

gg.Context

mut:

clip_rect Rect

}

// TODO: documentation

pub fn (mut d DrawDeviceContext) reset_clipping() {

// no need to actually set scissor_rect, it is reset each frame anyway, but

// we do need to reset the clip_rect

size := gg.window_size()

d.clip_rect = Rect{

x: 0

y: 0

w: size.width

h: size.height

}

$if ui_clipping ? {

println('clip: reset')

}

}

// TODO: documentation

pub fn (mut d DrawDeviceContext) set_clipping(rect Rect) {

d.clip_rect = rect

d.Context.scissor_rect(rect.x, rect.y, rect.w, rect.h)

$if ui_clipping ? {

println('clip: set ${rect.x} ${rect.y} ${rect.w} ${rect.h}')

}

}

// TODO: documentation

pub fn (d DrawDeviceContext) get_clipping() Rect {

return d.clip_rect

}

// TODO: documentation

pub fn (d DrawDeviceContext) text_width_additive(text string) f64 {

ctx := d.Context

adv := ctx.ft.fons.text_bounds(0, 0, text, &f32(unsafe { nil }))

return adv / ctx.scale

}

pub fn (d DrawDeviceContext) text_bounds(x int, y int, text string) []f32 {

ctx := d.Context

mut buf := [4]f32{}

ctx.ft.fons.text_bounds(x, y, text, &buf[0])

asc, desc, lineh := f32(0), f32(0), f32(0)

ctx.ft.fons.vert_metrics(&asc, &desc, &lineh)

return [buf[0], buf[1], (buf[2] - buf[0]) / ctx.scale, (buf[3] - buf[1]) / ctx.scale,

asc / ctx.scale, desc / ctx.scale, lineh / ctx.scale]

}

@[deprecated: 'use `widget.clipping` flag instead']

pub fn (d &DrawDeviceContext) scissor_rect(x int, y int, w int, h int) {

d.Context.scissor_rect(x, y, w, h)

}