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module gui
import gg
import math
import svg
import vglyph
// Helpers
fn make_window() Window {
// Minimal window; we do not touch window.ui in these tests
mut w := Window{}
// ensure clean renderers
w.renderers = []
return w
}
fn make_clip(x f32, y f32, w f32, h f32) DrawClip {
return gg.Rect{
x: x
y: y
width: w
height: h
}
}
// -----------------------------
// rects_overlap basic behavior
// -----------------------------
fn test_rects_overlap() {
a := make_clip(0, 0, 10, 10)
b := make_clip(5, 5, 10, 10)
c := make_clip(10, 0, 5, 5) // touches edge at x=10
assert rects_overlap(a, b)
assert !rects_overlap(a, c) // touching edge is not overlapping (strict <)
}
fn test_rounded_image_clip_params_intersects_and_maps_uv() {
img := DrawImage{
img: unsafe { nil }
x: 2
y: 2
w: 120
h: 120
}
clip := make_clip(4, 2, 116, 116)
params := rounded_image_clip_params(img, clip) or {
assert false, 'expected rounded image clip params'
return
}
assert f32_are_close(params.x, 4)
assert f32_are_close(params.y, 2)
assert f32_are_close(params.w, 116)
assert f32_are_close(params.h, 116)
assert f32_are_close(params.u0, -1 + f32(2.0 * 2.0 / 120.0))
assert f32_are_close(params.v0, -1)
assert f32_are_close(params.u1, -1 + f32(2.0 * 118.0 / 120.0))
assert f32_are_close(params.v1, -1 + f32(2.0 * 116.0 / 120.0))
}
fn test_rounded_image_clip_params_returns_none_when_no_overlap() {
img := DrawImage{
img: unsafe { nil }
x: 10
y: 10
w: 20
h: 20
}
assert rounded_image_clip_params(img, make_clip(0, 0, 5, 5)) == none
}
fn test_rounded_image_clip_params_shrinks_when_top_left_anchored_inner_clip() {
img := DrawImage{
img: unsafe { nil }
x: 2
y: 2
w: 120
h: 120
}
clip := make_clip(2, 2, 116, 116)
params := rounded_image_clip_params(img, clip) or {
assert false, 'expected rounded image clip params'
return
}
assert f32_are_close(params.x, 2)
assert f32_are_close(params.y, 2)
assert f32_are_close(params.w, 116)
assert f32_are_close(params.h, 116)
assert f32_are_close(params.u0, -1)
assert f32_are_close(params.v0, -1)
assert f32_are_close(params.u1, 1)
assert f32_are_close(params.v1, 1)
}
fn test_quantized_scissor_clip_matches_sokol_int_truncation() {
clip := make_clip(10.9, 20.9, 30.9, 40.9)
q := quantized_scissor_clip(clip, 1.0)
assert f32_are_close(q.x, 10)
assert f32_are_close(q.y, 20)
assert f32_are_close(q.width, 30)
assert f32_are_close(q.height, 40)
}
fn test_quantized_scissor_clip_respects_scale() {
clip := make_clip(1.26, 2.26, 3.26, 4.26)
q := quantized_scissor_clip(clip, 2.0)
// int(clip * 2.0) then /2.0
assert f32_are_close(q.x, 1.0)
assert f32_are_close(q.y, 2.0)
assert f32_are_close(q.width, 3.0)
assert f32_are_close(q.height, 4.0)
}
// -----------------------------
// dim_alpha halves the alpha
// -----------------------------
fn test_dim_alpha() {
c := rgba(10, 20, 30, 201)
d := dim_alpha(c)
assert d.r == c.r
assert d.g == c.g
assert d.b == c.b
// Integer division by 2
assert d.a == u8(201 / 2)
}
// --------------------------------------------
// render_rectangle emits a single DrawRect
// --------------------------------------------
fn test_render_rectangle_inside_clip() {
mut w := make_window()
mut s := Shape{
shape_type: .rectangle
x: 10
y: 20
width: 30
height: 40
color: rgb(100, 150, 200)
radius: 5
size_border: 0
}
clip := make_clip(0, 0, 200, 200)
render_rectangle(mut s, clip, mut w)
assert w.renderers.len == 1
r := w.renderers[0]
match r {
DrawRect {
assert r.x == s.x
assert r.y == s.y
assert r.w == s.width
assert r.h == s.height
assert r.style == .fill
assert r.is_rounded
assert r.radius == s.radius
assert r.color == s.color.to_gx_color()
}
else {
assert false, 'expected DrawRect'
}
}
}
fn test_render_rectangle_outside_clip_disables_shape() {
mut w := make_window()
mut s := Shape{
shape_type: .rectangle
x: 100
y: 100
width: 20
height: 20
color: rgb(10, 10, 10)
}
clip := make_clip(0, 0, 50, 50)
render_rectangle(mut s, clip, mut w)
assert w.renderers.len == 0
assert s.disabled
}
// ----------------------------------------
// render_circle emits a single DrawCircle
// ----------------------------------------
fn test_render_circle_inside_clip() {
mut w := make_window()
mut s := Shape{
shape_type: .circle
x: 0
y: 0
width: 40
height: 20
color: rgb(1, 2, 3)
size_border: 0
}
clip := make_clip(-10, -10, 100, 100)
render_circle(mut s, clip, mut w)
assert w.renderers.len == 1
c := w.renderers[0]
match c {
DrawCircle {
// Center should be at (x + w/2, y + h/2)
assert f32_are_close(c.x, s.x + s.width / 2)
assert f32_are_close(c.y, s.y + s.height / 2)
// Radius is half of the shortest side
assert f32_are_close(c.radius, f32_min(s.width, s.height) / 2)
assert c.color == s.color.to_gx_color()
}
else {
assert false, 'expected DrawCircle'
}
}
}
// --------------------------------------------------------
// render_layout: clip push before children, pop after
// --------------------------------------------------------
fn test_render_layout_clip_push_pop() {
mut w := make_window()
mut root := Layout{
shape: &Shape{
// Keep it invisible as a container to avoid text/container drawing
color: color_transparent
clip: true
padding: Padding{
left: 2
right: 3
top: 4
bottom: 5
}
size_border: 0
shape_clip: make_clip(10, 20, 100, 50)
}
children: []
}
initial_clip := make_clip(0, 0, 400, 400)
bg := rgb(0, 0, 0)
render_layout(mut root, bg, initial_clip, mut w)
// Expect two clips: computed shape_clip (with padding applied), then pop back to initial
assert w.renderers.len == 2
sc_push := w.renderers[0]
sc_pop := w.renderers[1]
match sc_push {
DrawClip {
assert f32_are_close(sc_push.x, 10 + 2)
assert f32_are_close(sc_push.y, 20 + 4)
assert f32_are_close(sc_push.width, 100 - (2 + 3))
assert f32_are_close(sc_push.height, 50 - (4 + 5))
}
else {
assert false, 'expected first renderer to be DrawClip (push)'
}
}
match sc_pop {
DrawClip {
assert f32_are_close(sc_pop.x, initial_clip.x)
assert f32_are_close(sc_pop.y, initial_clip.y)
assert f32_are_close(sc_pop.width, initial_clip.width)
assert f32_are_close(sc_pop.height, initial_clip.height)
}
else {
assert false, 'expected second renderer to be DrawClip (pop)'
}
}
}
fn test_resolve_clip_radius_keeps_parent_when_child_not_rounded() {
shape := &Shape{
clip: true
width: 60
height: 40
radius: 0
}
assert f32_are_close(resolve_clip_radius(12, shape), 12)
}
fn test_resolve_clip_radius_uses_min_for_nested_rounded() {
shape := &Shape{
clip: true
width: 60
height: 40
radius: 8
}
assert f32_are_close(resolve_clip_radius(12, shape), 8)
}
fn test_resolve_clip_radius_subtracts_border_and_padding() {
shape := &Shape{
clip: true
width: 80
height: 60
radius: 12
size_border: 1
padding: Padding{
left: 2
right: 2
top: 2
bottom: 2
}
}
// inset = 3 => 12 - 3 = 9
assert f32_are_close(resolve_clip_radius(0, shape), 9)
}
fn test_resolve_clip_radius_uses_max_inset_for_asymmetric_padding() {
shape := &Shape{
clip: true
width: 80
height: 60
radius: 20
size_border: 2
padding: Padding{
left: 1
right: 7
top: 3
bottom: 0
}
}
// max inset = 9 => 20 - 9 = 11
assert f32_are_close(resolve_clip_radius(0, shape), 11)
}
fn test_resolve_clip_radius_returns_parent_when_inset_consumes_radius() {
shape := &Shape{
clip: true
width: 60
height: 40
radius: 6
size_border: 2
padding: Padding{
left: 4
right: 4
top: 4
bottom: 4
}
}
assert f32_are_close(resolve_clip_radius(10, shape), 10)
}
fn test_resolve_clip_radius_ignores_non_finite_child_radius() {
shape := &Shape{
clip: true
width: 60
height: 40
radius: f32(math.inf(1))
}
assert f32_are_close(resolve_clip_radius(12, shape), 12)
}
fn test_pipelines_image_clip_state_defaults() {
p := Pipelines{}
assert !p.image_clip_init_failed
assert !p.image_clip_fallback_warned
}
fn test_render_shape_opacity_no_text_config_non_text_is_safe() {
mut w := make_window()
mut s := Shape{
shape_type: .rectangle
x: 0
y: 0
width: 20
height: 10
color: rgb(100, 120, 140)
opacity: 0.5
}
clip := make_clip(0, 0, 200, 200)
render_shape(mut s, color_transparent, clip, mut w)
assert w.renderers.len == 1
}
fn test_render_shape_text_without_text_config_degrades_safe() {
mut w := make_window()
mut s := Shape{
shape_type: .text
x: 0
y: 0
width: 50
height: 20
color: black
opacity: 0.5
}
clip := make_clip(0, 0, 200, 200)
render_shape(mut s, color_transparent, clip, mut w)
assert w.renderers.len == 0
}
fn test_render_text_transformed_non_focusable_uses_draw_layout_transformed() {
mut w := make_window()
mut s := Shape{
shape_type: .text
x: 10
y: 20
width: 120
height: 24
tc: &ShapeTextConfig{
text: 'abc'
cached_line_height: 12
text_style: TextStyle{
color: black
rotation_radians: 0.4
}
vglyph_layout: &vglyph.Layout{
lines: [
vglyph.Line{
start_index: 0
length: 3
rect: gg.Rect{
width: 20
height: 12
}
},
]
}
}
}
render_text(mut s, make_clip(0, 0, 300, 300), mut w)
assert w.renderers.len == 1
r := w.renderers[0]
match r {
DrawLayoutTransformed {
assert f32_are_close(r.x, s.x + s.padding_left())
assert f32_are_close(r.y, s.y + s.padding_top())
}
else {
assert false, 'expected DrawLayoutTransformed'
}
}
}
fn test_render_text_transformed_focusable_falls_back_to_draw_text() {
mut w := make_window()
mut s := Shape{
shape_type: .text
id_focus: 1
x: 10
y: 20
width: 120
height: 24
tc: &ShapeTextConfig{
text: 'abc'
cached_line_height: 12
text_style: TextStyle{
color: black
rotation_radians: 0.4
}
vglyph_layout: &vglyph.Layout{
lines: [
vglyph.Line{
start_index: 0
length: 3
rect: gg.Rect{
width: 20
height: 12
}
},
]
}
}
}
render_text(mut s, make_clip(0, 0, 300, 300), mut w)
assert w.renderers.len == 1
match w.renderers[0] {
DrawText {}
else {
assert false, 'expected DrawText'
}
}
}
fn test_render_rtf_uniform_transform_uses_draw_layout_transformed() {
mut w := make_window()
mut s := Shape{
shape_type: .rtf
id: 'rtf-uniform'
x: 5
y: 7
width: 140
height: 40
tc: &ShapeTextConfig{
rich_text: &RichText{
runs: [
RichTextRun{
text: 'A'
style: TextStyle{
color: black
rotation_radians: 0.2
}
},
RichTextRun{
text: 'B'
style: TextStyle{
color: black
rotation_radians: 0.2
}
},
]
}
vglyph_layout: &vglyph.Layout{}
}
}
render_rtf(mut s, make_clip(0, 0, 300, 300), mut w)
assert w.renderers.len == 1
match w.renderers[0] {
DrawLayoutTransformed {}
else {
assert false, 'expected DrawLayoutTransformed'
}
}
}
fn test_render_rtf_mixed_transform_falls_back_to_draw_layout() {
mut w := make_window()
mut s := Shape{
shape_type: .rtf
id: 'rtf-mixed'
x: 5
y: 7
width: 140
height: 40
tc: &ShapeTextConfig{
rich_text: &RichText{
runs: [
RichTextRun{
text: 'A'
style: TextStyle{
color: black
rotation_radians: 0.2
}
},
RichTextRun{
text: 'B'
style: TextStyle{
color: black
}
},
]
}
vglyph_layout: &vglyph.Layout{}
}
}
render_rtf(mut s, make_clip(0, 0, 300, 300), mut w)
assert w.renderers.len == 1
match w.renderers[0] {
DrawLayout {}
else {
assert false, 'expected DrawLayout'
}
}
}
fn test_render_rtf_transform_with_inline_object_falls_back_to_draw_layout() {
mut w := make_window()
mut s := Shape{
shape_type: .rtf
id: 'rtf-inline'
x: 5
y: 7
width: 140
height: 40
tc: &ShapeTextConfig{
rich_text: &RichText{
runs: [
RichTextRun{
text: 'A'
style: TextStyle{
color: black
rotation_radians: 0.2
}
},
]
}
vglyph_layout: &vglyph.Layout{
items: [
vglyph.Item{
ft_face: unsafe { nil }
is_object: true
object_id: 'math1'
},
]
}
}
}
render_rtf(mut s, make_clip(0, 0, 300, 300), mut w)
assert w.renderers.len == 1
match w.renderers[0] {
DrawLayout {}
else {
assert false, 'expected DrawLayout'
}
}
}
fn test_renderer_guard_valid_draw_rect() {
assert renderer_valid_for_draw(Renderer(DrawRect{
x: 1
y: 2
w: 20
h: 10
color: gg.Color{255, 255, 255, 255}
style: .fill
}))
}
fn test_renderer_guard_draw_gradient_allows_zero_size_noop() {
gradient := &Gradient{
stops: [GradientStop{
color: black
pos: 0.0
}]
}
assert renderer_valid_for_draw(Renderer(DrawGradient{
x: 21
y: 66
w: 0
h: 0
radius: 5.5
gradient: gradient
}))
}
fn test_renderer_guard_draw_stroke_rect_allows_zero_size_noop() {
assert renderer_valid_for_draw(Renderer(DrawStrokeRect{
x: 106
y: 29
w: 241.5
h: 0
radius: 5.5
color: gg.Color{255, 255, 255, 255}
thickness: 1.5
}))
}
fn test_renderer_guard_draw_rect_allows_zero_size_noop() {
assert renderer_valid_for_draw(Renderer(DrawRect{
x: 244.75
y: 312.1875
w: 0
h: 29.09375
radius: 5.5
color: gg.Color{255, 255, 255, 255}
style: .fill
}))
}
fn test_renderer_guard_invalid_draw_svg_odd_triangle_count() {
assert !renderer_valid_for_draw(Renderer(DrawSvg{
triangles: [f32(0), 0, 10, 0, 0, 10, 5]
color: gg.Color{255, 0, 0, 255}
x: 0
y: 0
scale: 1
}))
}
fn test_renderer_guard_invalid_draw_svg_vertex_colors_count_mismatch() {
assert !renderer_valid_for_draw(Renderer(DrawSvg{
triangles: [f32(0), 0, 10, 0, 0, 10]
color: gg.Color{255, 255, 255, 255}
vertex_colors: [gg.Color{255, 0, 0, 255}, gg.Color{0, 255, 0, 255},
gg.Color{0, 0, 255, 255}, gg.Color{255, 255, 0, 255}]
x: 0
y: 0
scale: 1
}))
}
fn test_renderer_guard_invalid_draw_filter_composite_non_positive_size_or_layers() {
assert !renderer_valid_for_draw(Renderer(DrawFilterComposite{
x: 0
y: 0
width: 0
height: -1
layers: 0
}))
}
fn test_renderer_guard_invalid_draw_layout_nil_layout() {
assert !renderer_valid_for_draw(Renderer(DrawLayout{
layout: unsafe { nil }
x: 0
y: 0
}))
}
fn test_renderer_guard_invalid_draw_clip_negative_size() {
assert !renderer_valid_for_draw(Renderer(make_clip(10, 20, -1, 5)))
}
fn test_renderer_guard_draw_text_requires_non_empty_text() {
assert renderer_valid_for_draw(Renderer(DrawText{
x: 1
y: 2
text: 'ok'
cfg: TextStyle{
color: black
size: 16
}.to_vglyph_cfg()
}))
assert !renderer_valid_for_draw(Renderer(DrawText{
x: 1
y: 2
text: ''
cfg: TextStyle{
color: black
size: 16
}.to_vglyph_cfg()
}))
}
fn test_renderer_guard_draw_layout_placed_requires_non_nil_layout() {
assert !renderer_valid_for_draw(Renderer(DrawLayoutPlaced{
layout: unsafe { nil }
placements: []
}))
assert renderer_valid_for_draw(Renderer(DrawLayoutPlaced{
layout: &vglyph.Layout{}
placements: []
}))
}
fn test_find_filter_bracket_range_matched_begin_end() {
renderers := [
Renderer(DrawNone{}),
Renderer(DrawSvg{
triangles: [f32(0), 0, 10, 0, 0, 10]
color: gg.Color{255, 255, 255, 255}
x: 0
y: 0
scale: 1
}),
Renderer(DrawFilterEnd{}),
Renderer(DrawNone{}),
]
bracket := find_filter_bracket_range(renderers, 0)
assert bracket.found_end
assert bracket.start_idx == 0
assert bracket.end_idx == 2
assert bracket.next_idx == 3
}
fn test_find_filter_bracket_range_unmatched_begin_end() {
renderers := [
Renderer(DrawNone{}),
Renderer(DrawNone{}),
]
bracket := find_filter_bracket_range(renderers, 0)
assert !bracket.found_end
assert bracket.start_idx == 0
assert bracket.end_idx == 2
assert bracket.next_idx == 2
}
fn test_render_svg_animated_transformed_paths_do_not_alias_triangle_buffer() {
mut w := make_window()
cached := &CachedSvg{
render_paths: [
CachedSvgPath{
triangles: [f32(0), 0, 10, 0, 0, 10]
color: gg.Color{255, 0, 0, 255}
group_id: 'ring'
},
CachedSvgPath{
triangles: [f32(20), 0, 30, 0, 20, 10]
color: gg.Color{0, 255, 0, 255}
group_id: 'ring'
},
]
animations: [
svg.SvgAnimation{
anim_type: .rotate
target_id: 'ring'
from: [f32(0), 0, 0]
to: [f32(0), 0, 0]
dur: 1
},
]
has_animations: true
scale: 1
}
render_svg_animated(cached, color_transparent, 'anim-buffer-alias', 0, 0, mut w)
assert w.renderers.len == 2
r0 := w.renderers[0] as DrawSvg
r1 := w.renderers[1] as DrawSvg
assert r0.triangles.len == 6
assert r1.triangles.len == 6
assert r0.triangles[0] == 0
assert r1.triangles[0] == 20
}
fn test_renderer_guard_valid_draw_clip_zero_size() {
assert renderer_valid_for_draw(Renderer(make_clip(10, 20, 0, 0)))
}
fn test_invalid_clip_is_skipped_and_next_draw_kept() {
invalid_clip := Renderer(make_clip(10, 20, -5, 10))
valid_rect := Renderer(DrawRect{
x: 1
y: 2
w: 20
h: 10
color: gg.Color{255, 255, 255, 255}
style: .fill
})
mut w := make_window()
assert !emit_renderer_if_valid(invalid_clip, mut w)
assert emit_renderer_if_valid(valid_rect, mut w)
assert w.renderers.len == 1
match w.renderers[0] {
DrawRect {}
else {
assert false, 'expected DrawRect after invalid clip skip'
}
}
}