1 files changed, 169 insertions, 0 deletions
diff --git a/v_windows/v/vlib/gg/image.c.v b/v_windows/v/vlib/gg/image.c.v
new file mode 100644
index 0000000..352eac4
--- /dev/null
+++ b/v_windows/v/vlib/gg/image.c.v
@@ -0,0 +1,169 @@
+// 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 os
+import stbi
+import sokol.gfx
+
+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
+}
+
+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
+}
+
+// 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}
+	)
+}
+
+// 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)
+}
+
+// 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
+}