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gg: simplify the image_cache

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This commit is contained in:
Delyan Angelov 2020-08-05 08:42:29 +03:00
parent 221a777a80
commit 7b1944c2da
1 changed files with 22 additions and 26 deletions
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48
vlib/gg/image.v
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@ -9,7 +9,6 @@ import stbi
pub struct Image { pub struct Image {
pub mut: pub mut:
id int // used as an index in image_cache.slots
width int width int
height int height int
nr_channels int nr_channels int
@ -17,23 +16,27 @@ pub mut:
data voidptr data voidptr
ext string ext string
path string path string
cache_slot &ImageCacheSlot = 0
} }
// //
struct ImageCacheSlot { struct ImageCacheSlot {
id int id int
simg_ok bool mut:
simg C.sg_image is_simg_ok bool
simg C.sg_image
} }
fn (mut cs ImageCacheSlot) set_sokol_image(simg C.sg_image) {
cs.simg = simg
cs.is_simg_ok = true
}
//
[ref_only] [ref_only]
struct ImageCache { struct ImageCache {
mut: mut:
current_image_id int = -1 current_image_id int = -1
slots []ImageCacheSlot slots []ImageCacheSlot
} }
fn new_image_cache() &ImageCache { fn (ic &ImageCache) get_new_cache_slot() &ImageCacheSlot {
return &ImageCache{}
}
fn (ic &ImageCache) get_new_id() int {
mut mic := &ImageCache(0) mut mic := &ImageCache(0)
unsafe { unsafe {
mic = ic mic = ic
@ -41,22 +44,12 @@ fn (ic &ImageCache) get_new_id() int {
mic.current_image_id++ mic.current_image_id++
mic.slots << ImageCacheSlot { mic.slots << ImageCacheSlot {
id: mic.current_image_id id: mic.current_image_id
simg_ok: false is_simg_ok: false
} }
return ic.current_image_id return &mic.slots[mic.slots.len-1]
}
fn (ic &ImageCache) set_simg(id int, simg C.sg_image) {
if id >= ic.slots.len {
panic('invalid image cache id: $id, slots.len: $ic.slots.len')
}
mut mic := &ImageCache(0)
unsafe {
mic = ic
}
mic.slots[id] = ImageCacheSlot{ id: id, simg_ok: true, simg: simg }
} }
const ( const (
image_cache = new_image_cache() image_cache = &ImageCache{}
) )
// //
pub fn create_image(file string) Image { pub fn create_image(file string) Image {
@ -66,7 +59,6 @@ pub fn create_image(file string) Image {
} }
stb_img := stbi.load(file) stb_img := stbi.load(file)
mut img := Image{ mut img := Image{
id: image_cache.get_new_id()
width: stb_img.width width: stb_img.width
height: stb_img.height height: stb_img.height
nr_channels: stb_img.nr_channels nr_channels: stb_img.nr_channels
@ -74,6 +66,7 @@ pub fn create_image(file string) Image {
data: stb_img.data data: stb_img.data
ext: stb_img.ext ext: stb_img.ext
path: file path: file
cache_slot: image_cache.get_new_cache_slot()
} }
return img return img
} }
@ -81,13 +74,13 @@ pub fn create_image(file string) Image {
pub fn create_image_from_memory(buf byteptr, bufsize int) Image { pub fn create_image_from_memory(buf byteptr, bufsize int) Image {
stb_img := stbi.load_from_memory(buf, bufsize) stb_img := stbi.load_from_memory(buf, bufsize)
mut img := Image{ mut img := Image{
id: image_cache.get_new_id()
width: stb_img.width width: stb_img.width
height: stb_img.height height: stb_img.height
nr_channels: stb_img.nr_channels nr_channels: stb_img.nr_channels
ok: stb_img.ok ok: stb_img.ok
data: stb_img.data data: stb_img.data
ext: stb_img.ext ext: stb_img.ext
cache_slot: image_cache.get_new_cache_slot()
} }
return img return img
} }
@ -116,12 +109,15 @@ pub fn (img &Image) new_sokol_image() C.sg_image {
} }
pub fn (img &Image) get_sokol_image() C.sg_image { pub fn (img &Image) get_sokol_image() C.sg_image {
slot := image_cache.slots[img.id] slot := img.cache_slot
if slot.simg_ok { if slot.is_simg_ok {
return slot.simg return slot.simg
} }
simg := img.new_sokol_image() simg := img.new_sokol_image()
image_cache.set_simg(img.id, simg) unsafe {
mut cs := slot
cs.set_sokol_image(simg)
}
return simg return simg
} }