forked from AbleOS/ableos
koniifer
6a8d92d2c2
refactor image loader for multiple filetypes port some broken math stuff make logger more readable
52 lines
1.1 KiB
Plaintext
52 lines
1.1 KiB
Plaintext
.{Color, Surface, new_surface, put_surface} := @use("../lib.hb");
|
|
.{log, memory} := @use("../../../stn/src/lib.hb")
|
|
|
|
BitmapFileHeader := packed struct {
|
|
magic: u16,
|
|
size: u32,
|
|
reserved_1: u16,
|
|
reserved_2: u16,
|
|
offset: u32,
|
|
}
|
|
|
|
BitmapInfoHeader := packed struct {
|
|
size: u32,
|
|
width: i32,
|
|
height: i32,
|
|
planes: u16,
|
|
bits: u16,
|
|
compression: u32,
|
|
image_size: u32,
|
|
x_resolution: i32,
|
|
y_resolution: i32,
|
|
n_colours: u32,
|
|
important_colours: u32,
|
|
}
|
|
|
|
BitmapColorHeader := packed struct {
|
|
red_mask: u32,
|
|
green_mask: u32,
|
|
blue_mask: u32,
|
|
alpha_mask: u32,
|
|
color_space_type: u32,
|
|
unused: u32,
|
|
}
|
|
|
|
from := fn(bmp: ^u8): ?Surface {
|
|
file_header := @as(^BitmapFileHeader, @bitcast(bmp))
|
|
info_header := @as(^BitmapInfoHeader, @bitcast(bmp + @sizeof(BitmapFileHeader)))
|
|
bmp += file_header.offset
|
|
|
|
if file_header.magic != 0x4D42 | info_header.width == 0 | info_header.height == 0 {
|
|
log.error("Invalid BMP image.\0")
|
|
return null
|
|
}
|
|
|
|
width := @as(uint, info_header.width)
|
|
height := @as(uint, info_header.height)
|
|
lhs := Surface.(@bitcast(bmp), width, height)
|
|
rhs := new_surface(width, height)
|
|
put_surface(rhs, lhs, .(0, 0), true)
|
|
|
|
return rhs
|
|
} |