294 lines
7.3 KiB
V
294 lines
7.3 KiB
V
// Copyright (c) 2019-2021 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 sokol.sapp
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// import sokol.gfx
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import os
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import sokol
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import sokol.sgl
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import stbi
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[heap]
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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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pub struct Rect {
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pub:
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x f32
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y f32
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width f32
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height f32
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}
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fn C.sg_isvalid() bool
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// TODO return ?Image
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pub fn (mut ctx Context) create_image(file string) Image {
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// println('\ncreate_image("$file")')
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if !os.exists(file) {
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return Image{}
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}
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$if macos {
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if ctx.native_rendering {
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// return C.darwin_create_image(file)
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mut img := C.darwin_create_image(file)
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// println('created macos image: $img.path w=$img.width')
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// C.printf('p = %p\n', img.data)
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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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}
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if !C.sg_isvalid() {
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// Sokol is not initialized yet, add stbi object to a queue/cache
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// ctx.image_queue << file
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stb_img := stbi.load(file) or { return Image{} }
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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 copypasta
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pub fn (mut ctx Context) create_image_with_size(file string, width int, height int) Image {
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if !C.sg_isvalid() {
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// Sokol is not initialized yet, add stbi object to a queue/cache
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// ctx.image_queue << file
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stb_img := stbi.load(file) or { return Image{} }
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img := Image{
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width: width
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height: 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) or { return Image{} }
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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 (mut ctx Context) create_image_from_memory(buf &byte, bufsize int) Image {
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stb_img := stbi.load_from_memory(buf, bufsize) or { return Image{} }
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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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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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pub fn (mut ctx Context) create_image_from_byte_array(b []byte) Image {
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return ctx.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: &char(0)
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d3d11_texture: 0
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}
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img_desc.data.subimage[0][0] = C.sg_range{
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ptr: img.data
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size: size_t(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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// Draw part of an image using uv coordinates
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// img_rect is the size and position (in pixels on screen) of the displayed rectangle (ie the draw_image args)
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// part_rect is the size and position (in absolute pixels in the image) of the wanted part
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// eg. On a 600*600 context, to display only the first 400*400 pixels of a 2000*2000 image
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// on the entire context surface, call :
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// draw_image_part(Rect{0, 0, 600, 600}, Rect{0, 0, 400, 400}, img)
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pub fn (ctx &Context) draw_image_part(img_rect Rect, part_rect Rect, img_ &Image) {
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if img_.id >= ctx.image_cache.len {
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eprintln('gg: draw_image() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
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return
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}
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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 := part_rect.x / img.width
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v0 := part_rect.y / img.height
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u1 := (part_rect.x + part_rect.width) / img.width
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v1 := (part_rect.y + part_rect.height) / img.height
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x0 := img_rect.x * ctx.scale
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y0 := img_rect.y * ctx.scale
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x1 := (img_rect.x + img_rect.width) * ctx.scale
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mut y1 := (img_rect.y + img_rect.height) * ctx.scale
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if img_rect.height == 0 {
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scale := f32(img.width) / f32(img_rect.width)
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y1 = f32(img_rect.y + int(f32(img.height) / scale)) * ctx.scale
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}
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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(x f32, y f32, width f32, height f32, img_ &Image) {
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$if macos {
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if img_.id >= ctx.image_cache.len {
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eprintln('gg: draw_image() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
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return
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}
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if ctx.native_rendering {
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if img_.width == 0 {
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return
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}
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if !os.exists(img_.path) {
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return
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}
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C.darwin_draw_image(x, ctx.height - (y + height), width, height, img_)
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return
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}
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}
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ctx.draw_image_part(Rect{x, y, width, height}, Rect{0, 0, img_.width, img_.height},
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img_)
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}
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// TODO remove copy pasta, merge the functions
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pub fn (ctx &Context) draw_image_flipped(x f32, y f32, width f32, height f32, img_ &Image) {
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if img_.id >= ctx.image_cache.len {
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eprintln('gg: draw_image_flipped() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
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return
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}
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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, u1, v0)
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sgl.v2f_t2f(x1, y0, u0, v0)
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sgl.v2f_t2f(x1, y1, u0, v1)
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sgl.v2f_t2f(x0, y1, u1, 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 f32, y f32, width f32, 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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pub fn (ctx &Context) draw_image_3d(x f32, y f32, z f32, width f32, height f32, img_ &Image) {
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if img_.id >= ctx.image_cache.len {
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eprintln('gg: draw_image_3d() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
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return
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}
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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.v3f_t2f(x0, y0, z, u0, v0)
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sgl.v3f_t2f(x1, y0, z, u1, v0)
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sgl.v3f_t2f(x1, y1, z, u1, v1)
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sgl.v3f_t2f(x0, y1, z, u0, v1)
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sgl.end()
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sgl.disable_texture()
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}
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