From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/old/vlib/gg/image.v | 384 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 384 insertions(+)
 create mode 100644 v_windows/v/old/vlib/gg/image.v

(limited to 'v_windows/v/old/vlib/gg/image.v')

diff --git a/v_windows/v/old/vlib/gg/image.v b/v_windows/v/old/vlib/gg/image.v
new file mode 100644
index 0000000..89a16d7
--- /dev/null
+++ b/v_windows/v/old/vlib/gg/image.v
@@ -0,0 +1,384 @@
+// 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 gx
+// import sokol.sapp
+import sokol.gfx
+import os
+import sokol
+import sokol.sgl
+import stbi
+
+[heap]
+pub struct Image {
+pub mut:
+	id          int
+	width       int
+	height      int
+	nr_channels int
+	ok          bool
+	data        voidptr
+	ext         string
+	simg_ok     bool
+	simg        C.sg_image
+	path        string
+}
+
+// DrawImageConfig struct defines the various options
+// that can be used to draw an image onto the screen
+pub struct DrawImageConfig {
+pub:
+	flip_x    bool
+	flip_y    bool
+	img       &Image = voidptr(0)
+	img_id    int
+	img_rect  Rect // defines the size and position on image when rendering to the screen
+	part_rect Rect // defines the size and position of part of the image to use when rendering
+	rotate    int  // amount to rotate the image in degrees
+	z         f32
+}
+
+pub struct Rect {
+pub:
+	x      f32
+	y      f32
+	width  f32
+	height f32
+}
+
+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
+}
+
+// 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
+}
+
+// TODO remove this
+fn create_image(file string) Image {
+	if !os.exists(file) {
+		println('gg.create_image(): file not found: $file')
+		return Image{} // none
+	}
+	stb_img := stbi.load(file) or { return Image{} }
+	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
+	}
+	img.init_sokol_image()
+	return img
+}
+
+pub fn (mut ctx Context) create_image_from_memory(buf &byte, bufsize int) Image {
+	stb_img := stbi.load_from_memory(buf, bufsize) or { return Image{} }
+	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
+		id: ctx.image_cache.len
+	}
+	ctx.image_cache << img
+	return img
+}
+
+pub fn (mut ctx Context) create_image_from_byte_array(b []byte) Image {
+	return ctx.create_image_from_memory(b.data, b.len)
+}
+
+pub fn (mut ctx Context) cache_image(img Image) int {
+	ctx.image_cache << img
+	image_idx := ctx.image_cache.len - 1
+	ctx.image_cache[image_idx].id = image_idx
+	return image_idx
+}
+
+pub fn (mut ctx Context) get_cached_image_by_idx(image_idx int) &Image {
+	return &ctx.image_cache[image_idx]
+}
+
+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
+}
+
+pub struct StreamingImageConfig {
+	pixel_format gfx.PixelFormat = .rgba8
+	wrap_u       gfx.Wrap        = .clamp_to_edge
+	wrap_v       gfx.Wrap        = .clamp_to_edge
+	min_filter   gfx.Filter      = .linear
+	mag_filter   gfx.Filter      = .linear
+	num_mipmaps  int = 1
+	num_slices   int = 1
+}
+
+// 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)
+}
+
+// draw_image_with_config takes in a config that details how the
+// provided image should be drawn onto the screen
+pub fn (ctx &Context) draw_image_with_config(config DrawImageConfig) {
+	id := if !isnil(config.img) { config.img.id } else { config.img_id }
+	if id >= ctx.image_cache.len {
+		eprintln('gg: draw_image() bad img id $id (img cache len = $ctx.image_cache.len)')
+		return
+	}
+
+	img := ctx.image_cache[id]
+	if !img.simg_ok {
+		return
+	}
+
+	mut img_rect := config.img_rect
+	if img_rect.width == 0 && img_rect.height == 0 {
+		img_rect = Rect{img_rect.x, img_rect.y, img.width, img.height}
+	}
+
+	mut part_rect := config.part_rect
+	if part_rect.width == 0 && part_rect.height == 0 {
+		part_rect = Rect{part_rect.x, part_rect.y, img.width, img.height}
+	}
+
+	u0 := part_rect.x / img.width
+	v0 := part_rect.y / img.height
+	u1 := (part_rect.x + part_rect.width) / img.width
+	v1 := (part_rect.y + part_rect.height) / img.height
+	x0 := img_rect.x * ctx.scale
+	y0 := img_rect.y * ctx.scale
+	x1 := (img_rect.x + img_rect.width) * ctx.scale
+	mut y1 := (img_rect.y + img_rect.height) * ctx.scale
+	if img_rect.height == 0 {
+		scale := f32(img.width) / f32(img_rect.width)
+		y1 = f32(img_rect.y + int(f32(img.height) / scale)) * ctx.scale
+	}
+
+	flip_x := config.flip_x
+	flip_y := config.flip_y
+
+	mut u0f := if !flip_x { u0 } else { u1 }
+	mut u1f := if !flip_x { u1 } else { u0 }
+	mut v0f := if !flip_y { v0 } else { v1 }
+	mut v1f := if !flip_y { v1 } else { v0 }
+
+	sgl.load_pipeline(ctx.timage_pip)
+	sgl.enable_texture()
+	sgl.texture(img.simg)
+
+	if config.rotate != 0 {
+		width := img_rect.width * ctx.scale
+		height := (if img_rect.height > 0 { img_rect.height } else { img.height }) * ctx.scale
+
+		sgl.push_matrix()
+		sgl.translate(x0 + (width / 2), y0 + (height / 2), 0)
+		sgl.rotate(sgl.rad(-config.rotate), 0, 0, 1)
+		sgl.translate(-x0 - (width / 2), -y0 - (height / 2), 0)
+	}
+
+	sgl.begin_quads()
+	sgl.c4b(255, 255, 255, 255)
+	sgl.v3f_t2f(x0, y0, config.z, u0f, v0f)
+	sgl.v3f_t2f(x1, y0, config.z, u1f, v0f)
+	sgl.v3f_t2f(x1, y1, config.z, u1f, v1f)
+	sgl.v3f_t2f(x0, y1, config.z, u0f, v1f)
+	sgl.end()
+
+	if config.rotate != 0 {
+		sgl.pop_matrix()
+	}
+
+	sgl.disable_texture()
+}
+
+// Draw part of an image using uv coordinates
+// img_rect is the size and position (in pixels on screen) of the displayed rectangle (ie the draw_image args)
+// part_rect is the size and position (in absolute pixels in the image) of the wanted part
+// eg. On a 600*600 context, to display only the first 400*400 pixels of a 2000*2000 image
+// on the entire context surface, call :
+// draw_image_part(Rect{0, 0, 600, 600}, Rect{0, 0, 400, 400}, img)
+pub fn (ctx &Context) draw_image_part(img_rect Rect, part_rect Rect, img_ &Image) {
+	ctx.draw_image_with_config(
+		img: img_
+		img_rect: img_rect
+		part_rect: part_rect
+	)
+}
+
+// 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}
+	)
+}
+
+// draw_image_flipped draws the provided image flipped horizontally (use `draw_image_with_config` to flip vertically)
+pub fn (ctx &Context) draw_image_flipped(x f32, y f32, width f32, height f32, img_ &Image) {
+	ctx.draw_image_with_config(
+		flip_x: true
+		img: img_
+		img_rect: Rect{x, y, width, height}
+	)
+}
+
+// draw_image_by_id draws an image by its id
+pub fn (ctx &Context) draw_image_by_id(x f32, y f32, width f32, height f32, id int) {
+	ctx.draw_image_with_config(
+		img_id: id
+		img_rect: Rect{x, y, width, height}
+	)
+}
+
+// draw_image_3d draws an image with a z depth
+pub fn (ctx &Context) draw_image_3d(x f32, y f32, z f32, width f32, height f32, img_ &Image) {
+	ctx.draw_image_with_config(
+		img: img_
+		img_rect: Rect{x, y, width, height}
+		z: z
+	)
+}
-- 
cgit v1.2.3