v/vlib/gg/image.v

149 lines
3.3 KiB
V
Raw Normal View History

2020-08-05 03:15:37 +02:00
// Copyright (c) 2019-2020 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 gx
2020-08-05 03:15:37 +02:00
import os
import sokol
//import sokol.sapp
2020-08-05 03:15:37 +02:00
import sokol.sgl
//import sokol.gfx
2020-08-05 03:15:37 +02:00
import stbi
pub struct Image {
pub mut:
2020-08-05 16:00:24 +02:00
id int
2020-08-05 03:15:37 +02:00
width int
height int
nr_channels int
ok bool
data voidptr
ext string
2020-08-05 14:34:28 +02:00
simg_ok bool
simg C.sg_image
2020-08-05 03:15:37 +02:00
path string
}
2020-08-05 14:34:28 +02:00
2020-08-05 16:00:24 +02:00
fn C.sg_isvalid() bool
// TODO return ?Image
2020-08-05 16:00:24 +02:00
pub fn (mut ctx Context) create_image(file string) Image {
if !C.sg_isvalid() {
// Sokol is not initialized yet, add stbi object to a queue/cache
2020-08-05 16:00:24 +02:00
//ctx.image_queue << file
stb_img := stbi.load(file) or { return Image{} }
2020-08-05 16:00:24 +02:00
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
2020-08-05 07:09:25 +02:00
}
2020-08-05 14:34:28 +02:00
2020-08-05 16:00:24 +02:00
// TODO remove this
fn create_image(file string) Image {
2020-08-05 03:15:37 +02:00
if !os.exists(file) {
println('gg.create_image(): file not found: $file')
return Image{} // none
}
stb_img := stbi.load(file) or { return Image{} }
2020-08-05 03:15:37 +02:00
mut img := Image{
width: stb_img.width
height: stb_img.height
nr_channels: stb_img.nr_channels
ok: stb_img.ok
data: stb_img.data
ext: stb_img.ext
path: file
}
2020-08-05 14:34:28 +02:00
img.init_sokol_image()
2020-08-05 03:15:37 +02:00
return img
}
pub fn create_image_from_memory(buf byteptr, bufsize int) Image {
stb_img := stbi.load_from_memory(buf, bufsize) or { return Image{} }
2020-08-05 03:15:37 +02:00
mut img := Image{
width: stb_img.width
height: stb_img.height
nr_channels: stb_img.nr_channels
ok: stb_img.ok
data: stb_img.data
ext: stb_img.ext
}
return img
}
pub fn create_image_from_byte_array(b []byte) Image {
return create_image_from_memory(b.data, b.len)
}
2020-08-05 14:34:28 +02:00
pub fn (mut img Image) init_sokol_image() &Image {
2020-08-05 16:00:24 +02:00
//println('\n init sokol image $img.path ok=$img.simg_ok')
2020-08-05 03:15:37 +02:00
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: &byte(0)
d3d11_texture: 0
}
img_desc.content.subimage[0][0] = C.sg_subimage_content{
ptr: img.data
size: img.nr_channels * img.width * img.height
}
2020-08-05 14:34:28 +02:00
img.simg = C.sg_make_image(&img_desc)
img.simg_ok = true
2020-08-05 16:00:24 +02:00
img.ok = true
2020-08-05 14:34:28 +02:00
return img
2020-08-05 03:15:37 +02:00
}
2020-08-05 16:00:24 +02:00
pub fn (ctx &Context) draw_image(x, y, width, height f32, img_ &Image) {
2020-08-18 01:08:58 +02:00
if img_.id >= ctx.image_cache.len {
eprintln('gg: draw_image() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
return
}
2020-08-05 16:00:24 +02:00
img := ctx.image_cache[img_.id] // fetch the image from cache
2020-08-05 14:34:28 +02:00
if !img.simg_ok {
return
}
2020-08-05 03:15:37 +02:00
u0 := f32(0.0)
v0 := f32(0.0)
u1 := f32(1.0)
v1 := f32(1.0)
x0 := f32(x) * ctx.scale
y0 := f32(y) * ctx.scale
x1 := f32(x + width) * ctx.scale
y1 := f32(y + height) * ctx.scale
//
sgl.load_pipeline(ctx.timage_pip)
sgl.enable_texture()
2020-08-05 14:34:28 +02:00
sgl.texture(img.simg)
2020-08-05 03:15:37 +02:00
sgl.begin_quads()
sgl.c4b(255, 255, 255, 255)
sgl.v2f_t2f(x0, y0, u0, v0)
sgl.v2f_t2f(x1, y0, u1, v0)
sgl.v2f_t2f(x1, y1, u1, v1)
sgl.v2f_t2f(x0, y1, u0, v1)
sgl.end()
sgl.disable_texture()
}
2020-08-05 14:34:28 +02:00
2020-08-05 16:00:24 +02:00
pub fn (ctx &Context) draw_image_by_id(x, y, width, height f32, id int) {
img := ctx.image_cache[id]
ctx.draw_image(x,y,width,height,img)
}
2020-08-05 14:34:28 +02:00