SectrPrototype/code/text.odin

100 lines
2.3 KiB
Odin

package sectr
import "core:unicode/utf8"
import rl "vendor:raylib"
debug_draw_text :: proc( content : string, pos : Vec2, size : f32 = 16.0, color : rl.Color = rl.WHITE, font : rl.Font = {} )
{
state := get_state(); using state
if len( content ) == 0 {
return
}
runes := utf8.string_to_runes( content, context.temp_allocator )
font := font
if ( font.glyphs == nil ) {
font = default_font
}
pos := screen_to_render(pos)
rl.DrawTextCodepoints( font,
raw_data(runes), cast(i32) len(runes),
position = transmute(rl.Vector2) pos,
fontSize = size,
spacing = 0.0,
tint = color );
}
// Raylib's equivalent doesn't take a length for the string (making it a pain in the ass)
// So this is a 1:1 copy except it takes Odin strings
measure_text_size :: proc ( text : string, font : Font, font_size, spacing : f32 ) -> AreaSize
{
// This is a static var within raylib. We don't have getter access to it.
@static text_line_spacing : f32 = 15
text_size : AreaSize
if font.texture.id == 0 || len(text) == 0 {
return text_size
}
temp_byte_counter : i32 = 0 // Used to count longer text line num chars
byte_counter : i32 = 0
text_width : f32 = 0.0
temp_text_width : f32 = 0.0 // Used to counter longer text line width
text_height := cast(f32) font.baseSize
scale_factor := font_size / text_height
letter : rune
index : i32 = 0
for id : i32 = 0; id < i32(len(text)); {
byte_counter += 1
next : i32 = 0
ctext := cast(cstring) ( & raw_data( text )[id] )
letter = rl.GetCodepointNext( ctext, & next )
index = rl.GetGlyphIndex( font, letter )
id += 1
if letter != rune('\n')
{
if font.glyphs[index].advanceX != 0 {
text_width += f32(font.glyphs[index].advanceX)
}
else {
text_width += font.recs[index].width + f32(font.glyphs[index].offsetX)
}
}
else
{
if temp_text_width < text_width {
temp_text_width = text_width
}
byte_counter = 0
text_width = 0
text_height += text_line_spacing
if temp_byte_counter < byte_counter {
temp_byte_counter = byte_counter
}
}
}
if temp_text_width < text_width {
temp_text_width = text_width
}
text_size.x = temp_text_width * scale_factor + f32(temp_byte_counter - 1) * spacing
text_size.y = text_height * scale_factor
return text_size
}