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// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
module gg
import os
import stbi
import sokol.gfx
fn C.sg_isvalid() bool
// TODO return ?Image
pub fn (mut ctx Context) create_image(file string) Image {
// println('\ncreate_image("$file")')
if !os.exists(file) {
return Image{}
}
$if macos {
if ctx.native_rendering {
// return C.darwin_create_image(file)
mut img := C.darwin_create_image(file)
// println('created macos image: $img.path w=$img.width')
// C.printf('p = %p\n', img.data)
img.id = ctx.image_cache.len
ctx.image_cache << img
return img
}
}
if !C.sg_isvalid() {
// Sokol is not initialized yet, add stbi object to a queue/cache
// ctx.image_queue << file
stb_img := stbi.load(file) or { return Image{} }
img := Image{
width: stb_img.width
height: stb_img.height
nr_channels: stb_img.nr_channels
ok: false
data: stb_img.data
ext: stb_img.ext
path: file
id: ctx.image_cache.len
}
ctx.image_cache << img
return img
}
mut img := create_image(file)
img.id = ctx.image_cache.len
ctx.image_cache << img
return img
}
pub fn (mut img Image) init_sokol_image() &Image {
// println('\n init sokol image $img.path ok=$img.simg_ok')
mut img_desc := C.sg_image_desc{
width: img.width
height: img.height
num_mipmaps: 0
wrap_u: .clamp_to_edge
wrap_v: .clamp_to_edge
label: img.path.str
d3d11_texture: 0
}
img_desc.data.subimage[0][0] = C.sg_range{
ptr: img.data
size: size_t(img.nr_channels * img.width * img.height)
}
img.simg = C.sg_make_image(&img_desc)
img.simg_ok = true
img.ok = true
return img
}
// draw_image draws the provided image onto the screen
pub fn (ctx &Context) draw_image(x f32, y f32, width f32, height f32, img_ &Image) {
$if macos {
if img_.id >= ctx.image_cache.len {
eprintln('gg: draw_image() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
return
}
if ctx.native_rendering {
if img_.width == 0 {
return
}
if !os.exists(img_.path) {
return
}
C.darwin_draw_image(x, ctx.height - (y + height), width, height, img_)
return
}
}
ctx.draw_image_with_config(
img: img_
img_rect: Rect{x, y, width, height}
part_rect: Rect{0, 0, img_.width, img_.height}
)
}
// new_streaming_image returns a cached `image_idx` of a special image, that
// can be updated *each frame* by calling: gg.update_pixel_data(image_idx, buf)
// ... where buf is a pointer to the actual pixel data for the image.
// NB: you still need to call app.gg.draw_image after that, to actually draw it.
pub fn (mut ctx Context) new_streaming_image(w int, h int, channels int, sicfg StreamingImageConfig) int {
mut img := Image{}
img.width = w
img.height = h
img.nr_channels = channels // 4 bytes per pixel for .rgba8, see pixel_format
mut img_desc := C.sg_image_desc{
width: img.width
height: img.height
pixel_format: sicfg.pixel_format
num_slices: 1
num_mipmaps: 1
usage: .stream
wrap_u: sicfg.wrap_u
wrap_v: sicfg.wrap_v
min_filter: sicfg.min_filter
mag_filter: sicfg.mag_filter
label: img.path.str
}
// Sokol requires that streamed images have NO .ptr/.size initially:
img_desc.data.subimage[0][0] = C.sg_range{
ptr: 0
size: size_t(0)
}
img.simg = C.sg_make_image(&img_desc)
img.simg_ok = true
img.ok = true
img_idx := ctx.cache_image(img)
return img_idx
}
// update_pixel_data is a helper for working with image streams (i.e. images,
// that are updated dynamically by the CPU on each frame)
pub fn (mut ctx Context) update_pixel_data(cached_image_idx int, buf &byte) {
mut image := ctx.get_cached_image_by_idx(cached_image_idx)
image.update_pixel_data(buf)
}
pub fn (mut img Image) update_pixel_data(buf &byte) {
mut data := C.sg_image_data{}
data.subimage[0][0].ptr = buf
data.subimage[0][0].size = size_t(img.width * img.height * img.nr_channels)
gfx.update_image(img.simg, &data)
}
// TODO copypasta
pub fn (mut ctx Context) create_image_with_size(file string, width int, height int) Image {
if !C.sg_isvalid() {
// Sokol is not initialized yet, add stbi object to a queue/cache
// ctx.image_queue << file
stb_img := stbi.load(file) or { return Image{} }
img := Image{
width: width
height: height
nr_channels: stb_img.nr_channels
ok: false
data: stb_img.data
ext: stb_img.ext
path: file
id: ctx.image_cache.len
}
ctx.image_cache << img
return img
}
mut img := create_image(file)
img.id = ctx.image_cache.len
ctx.image_cache << img
return img
}
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