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implement sprite scaling

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This commit is contained in:
Alessandro Mauri 2025-10-23 22:30:18 +02:00
parent c63d08c462
commit 793fd1aa28
5 changed files with 33 additions and 18 deletions
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2
lib/ugui.c3l/src/widgets/button.c3
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@ -145,7 +145,7 @@ fn void? Ctx.checkbox_id(&ctx, Id id, String description, bool* active, String t
if (*active) {
Sprite* sprite = ctx.sprite_atlas.get(tick_sprite)!;
Id tex_id = ctx.sprite_atlas.id;
ctx.push_sprite(sprite.rect().center_to(check_bounds), sprite.uv(), tex_id, parent.z_index, type: sprite.type)!;
ctx.push_sprite(check_bounds, sprite.uv(), tex_id, parent.z_index, type: sprite.type)!;
}
} else {
if (*active) {

27
lib/ugui.c3l/src/widgets/sprite.c3
View file

@ -4,9 +4,9 @@ struct ElemSprite {
Id id;
}
macro Ctx.sprite(&ctx, String name, ...)
=> ctx.sprite_id(@compute_id($vasplat), name);
fn void? Ctx.sprite_id(&ctx, Id id, String name)
macro Ctx.sprite(&ctx, String name, short size = 0, ...)
=> ctx.sprite_id(@compute_id($vasplat), name, size);
fn void? Ctx.sprite_id(&ctx, Id id, String name, short size = 0)
{
id = ctx.gen_id(id)!;
Elem* parent, elem;
@ -16,11 +16,26 @@ fn void? Ctx.sprite_id(&ctx, Id id, String name)
Sprite* sprite = ctx.sprite_atlas.get(name)!;
elem.sprite.id = ctx.get_sprite_atlas_id(name);
elem.layout.w = elem.layout.children.w = @exact(sprite.w);
elem.layout.h = elem.layout.children.h = @exact(sprite.h);
// scale the sprite so that the biggest dimension becomes "size"
short width = sprite.w;
short height = sprite.h;
if (size > 0) {
if (sprite.w >= sprite.h) {
width = size;
height = (short)(size * (float)height/width);
} else {
width = (short)(size * (float)width/height);
height = size;
}
}
elem.layout.w = elem.layout.children.w = @exact(width);
elem.layout.h = elem.layout.children.h = @exact(height);
elem.layout.content_offset = style.margin + style.border + style.padding;
update_parent_size(elem, parent);
Id tex_id = ctx.sprite_atlas.id;
return ctx.push_sprite(elem.bounds, sprite.uv(), tex_id, parent.z_index, type: sprite.type)!;
Rect content_bounds = elem.bounds.pad(elem.layout.content_offset);
return ctx.push_sprite(content_bounds, sprite.uv(), tex_id, parent.z_index, type: sprite.type)!;
}