143 lines
3.0 KiB
V
143 lines
3.0 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
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module gg
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import gx
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import os
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import sokol
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import sokol.sapp
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import sokol.sgl
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import sokol.gfx
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import stbi
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pub struct Image {
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pub mut:
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id int
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width int
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height int
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nr_channels int
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ok bool
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data voidptr
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ext string
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simg_ok bool
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simg C.sg_image
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path string
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}
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fn C.sg_isvalid() bool
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pub fn (mut ctx Context) create_image(file string) Image {
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if !C.sg_isvalid() {
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//ctx.image_queue << file
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stb_img := stbi.load(file)
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img := Image{
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width: stb_img.width
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height: stb_img.height
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nr_channels: stb_img.nr_channels
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ok: false
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data: stb_img.data
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ext: stb_img.ext
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path: file
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id: ctx.image_cache.len
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}
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ctx.image_cache << img
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return img
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}
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mut img := create_image(file)
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img.id = ctx.image_cache.len
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ctx.image_cache << img
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return img
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}
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// TODO remove this
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fn create_image(file string) Image {
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if !os.exists(file) {
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println('gg.create_image(): file not found: $file')
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return Image{} // none
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}
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stb_img := stbi.load(file)
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mut img := Image{
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width: stb_img.width
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height: stb_img.height
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nr_channels: stb_img.nr_channels
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ok: stb_img.ok
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data: stb_img.data
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ext: stb_img.ext
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path: file
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}
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img.init_sokol_image()
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return img
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}
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pub fn create_image_from_memory(buf byteptr, bufsize int) Image {
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stb_img := stbi.load_from_memory(buf, bufsize)
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mut img := Image{
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width: stb_img.width
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height: stb_img.height
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nr_channels: stb_img.nr_channels
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ok: stb_img.ok
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data: stb_img.data
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ext: stb_img.ext
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}
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return img
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}
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pub fn create_image_from_byte_array(b []byte) Image {
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return create_image_from_memory(b.data, b.len)
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}
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pub fn (mut img Image) init_sokol_image() &Image {
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//println('\n init sokol image $img.path ok=$img.simg_ok')
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mut img_desc := C.sg_image_desc{
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width: img.width
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height: img.height
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num_mipmaps: 0
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wrap_u: .clamp_to_edge
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wrap_v: .clamp_to_edge
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label: &byte(0)
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d3d11_texture: 0
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}
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img_desc.content.subimage[0][0] = C.sg_subimage_content{
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ptr: img.data
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size: img.nr_channels * img.width * img.height
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}
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img.simg = C.sg_make_image(&img_desc)
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img.simg_ok = true
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img.ok = true
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return img
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}
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pub fn (ctx &Context) draw_image(x, y, width, height f32, img_ &Image) {
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img := ctx.image_cache[img_.id] // fetch the image from cache
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if !img.simg_ok {
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return
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}
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u0 := f32(0.0)
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v0 := f32(0.0)
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u1 := f32(1.0)
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v1 := f32(1.0)
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x0 := f32(x) * ctx.scale
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y0 := f32(y) * ctx.scale
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x1 := f32(x + width) * ctx.scale
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y1 := f32(y + height) * ctx.scale
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//
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sgl.load_pipeline(ctx.timage_pip)
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sgl.enable_texture()
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sgl.texture(img.simg)
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sgl.begin_quads()
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sgl.c4b(255, 255, 255, 255)
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sgl.v2f_t2f(x0, y0, u0, v0)
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sgl.v2f_t2f(x1, y0, u1, v0)
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sgl.v2f_t2f(x1, y1, u1, v1)
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sgl.v2f_t2f(x0, y1, u0, v1)
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sgl.end()
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sgl.disable_texture()
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}
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pub fn (ctx &Context) draw_image_by_id(x, y, width, height f32, id int) {
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img := ctx.image_cache[id]
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ctx.draw_image(x,y,width,height,img)
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}
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