package images

import "core:fmt"
import "core:strings"
import stbi "vendor:stb/image"

Error :: Maybe(string)

@(require_results)
load_string :: proc(text: string) -> (image: Image, error: Error = nil) {
    pixels_mp := stbi.load_from_memory(
        raw_data(text),
        i32(len(text)),
        &image.width,
        &image.height,
        &image.channels,
        4,
    )
    if pixels_mp == nil {
        error = fmt.tprintf("Failed to load, falling back to default texture")
        image = default_image
        return
    }

    image.pixels = pixels_mp[:image.width * image.height * image.channels]
    return
}

@(require_results)
load :: proc(filename: string) -> (image: Image, error: Error = nil) {
    filename_cstring := strings.clone_to_cstring(filename, context.temp_allocator)

    pixels_mp := stbi.load(filename_cstring, &image.width, &image.height, &image.channels, 4)
    if pixels_mp == nil {
        error = fmt.tprintf("Failed to load {}, falling back to default texture", filename)
        image = default_image
        return
    }

    image.pixels = pixels_mp[:image.width * image.height * image.channels]
    return
}

default_image := Image {
    width    = 2,
    height   = 2,
    channels = 4,
    pixels   = []u8{255, 0, 0, 255, 0, 0, 0, 255, 0, 0, 0, 255, 255, 0, 0, 255},
}