armorpaint/base/Sources/export_texture.ts

///if (is_paint || is_lab)

let export_texture_gamma: f32 = 1.0 / 2.2;

function export_texture_run(path: string, bake_material: bool = false) {

	///if is_paint
	if (bake_material) {
		export_texture_run_bake_material(path);
	}
	else if (context_raw.layers_export == export_mode_t.PER_UDIM_TILE) {
		let udim_tiles: string[] = [];
		for (let l of project_layers) {
			if (slot_layer_get_object_mask(l) > 0) {
				let name: string = project_paint_objects[slot_layer_get_object_mask(l) - 1].base.name;
				if (name.substr(name.length - 5, 2) == ".1") { // tile.1001
					udim_tiles.push(name.substr(name.length - 5));
				}
			}
		}
		if (udim_tiles.length > 0) {
			for (let udim_tile of udim_tiles) export_texture_run_layers(path, project_layers, udim_tile);
		}
		else export_texture_run_layers(path, project_layers);
	}
	else if (context_raw.layers_export == export_mode_t.PER_OBJECT) {
		let object_names: string[] = [];
		for (let l of project_layers) {
			if (slot_layer_get_object_mask(l) > 0) {
				let name: string = project_paint_objects[slot_layer_get_object_mask(l) - 1].base.name;
				if (object_names.indexOf(name) == -1) {
					object_names.push(name);
				}
			}
		}
		if (object_names.length > 0) {
			for (let name of object_names) export_texture_run_layers(path, project_layers, name);
		}
		else export_texture_run_layers(path, project_layers);
	}
	else { // Visible or selected
		let atlas_export: bool = false;
		if (project_atlas_objects != null) {
			for (let i: i32 = 1; i < project_atlas_objects.length; ++i) {
				if (project_atlas_objects[i - 1] != project_atlas_objects[i]) {
					atlas_export = true;
					break;
				}
			}
		}
		if (atlas_export) {
			for (let atlas_index: i32 = 0; atlas_index < project_atlas_objects.length; ++atlas_index) {
				let layers: SlotLayerRaw[] = [];
				for (let object_index: i32 = 0; object_index < project_atlas_objects.length; ++object_index) {
					if (project_atlas_objects[object_index] == atlas_index) {
						for (let l of project_layers) {
							if (slot_layer_get_object_mask(l) == 0 /* shared object */ || slot_layer_get_object_mask(l) - 1 == object_index) layers.push(l);
						}
					}
				}
				if (layers.length > 0) {
					export_texture_run_layers(path, layers, project_atlas_names[atlas_index]);
				}
			}
		}
		else export_texture_run_layers(path, context_raw.layers_export == export_mode_t.SELECTED ? (slot_layer_is_group(context_raw.layer) ? slot_layer_get_children(context_raw.layer) : [context_raw.layer]) : project_layers);
	}
	///end

	///if is_lab
	export_texture_run_layers(path, [brush_output_node_inst]);
	///end

	///if krom_ios
	console_info(tr("Textures exported") + " ('Files/On My iPad/" + manifest_title + "')");
	///elseif krom_android
	console_info(tr("Textures exported") + " ('Files/Internal storage/Pictures/" + manifest_title + "')");
	///else
	console_info(tr("Textures exported"));
	///end
	ui_files_last_path = "";
}

///if is_paint
function export_texture_run_bake_material(path: string) {
	if (render_path_paint_live_layer == null) {
		render_path_paint_live_layer = slot_layer_create("_live");
	}

	let _tool: workspace_tool_t = context_raw.tool;
	context_raw.tool = workspace_tool_t.FILL;
	make_material_parse_paint_material();
	let _paint_object: mesh_object_t = context_raw.paint_object;
	let planeo: mesh_object_t = scene_get_child(".Plane").ext;
	planeo.base.visible = true;
	context_raw.paint_object = planeo;
	context_raw.pdirty = 1;
	render_path_paint_use_live_layer(true);
	render_path_paint_commands_paint(false);
	render_path_paint_use_live_layer(false);
	context_raw.tool = _tool;
	make_material_parse_paint_material();
	context_raw.pdirty = 0;
	planeo.base.visible = false;
	context_raw.paint_object = _paint_object;

	export_texture_run_layers(path, [render_path_paint_live_layer], "", true);
}
///end

///if is_paint
function export_texture_run_layers(path: string, layers: SlotLayerRaw[], object_name: string = "", bake_material: bool = false) {
///end

///if is_lab
function export_texture_run_layers(path: string, layers: any[], object_name: string = "") {
///end

	let texture_size_x: i32 = config_get_texture_res_x();
	let texture_size_y: i32 = config_get_texture_res_y();
	///if (krom_android || krom_ios)
	let f: string = sys_title();
	///else
	let f: string = ui_files_filename;
	///end
	if (f == "") f = tr("untitled");
	let format_type: texture_ldr_format_t = context_raw.format_type;
	let bits: i32 = base_bits_handle.position == texture_bits_t.BITS8 ? 8 : 16;
	let ext: string = bits == 16 ? ".exr" : format_type == texture_ldr_format_t.PNG ? ".png" : ".jpg";
	if (f.endsWith(ext)) f = f.substr(0, f.length - 4);

	///if is_paint
	let is_udim: bool = context_raw.layers_export == export_mode_t.PER_UDIM_TILE;
	if (is_udim) ext = object_name + ext;

	base_make_temp_img();
	base_make_export_img();
	if (base_pipe_merge == null) base_make_pipe();
	if (const_data_screen_aligned_vb == null) const_data_create_screen_aligned_data();
	let empty: image_t = render_path_render_targets.get("empty_white")._image;

	// Append object mask name
	let export_selected: bool = context_raw.layers_export == export_mode_t.SELECTED;
	if (export_selected && slot_layer_get_object_mask(layers[0]) > 0) {
		f += "_" + project_paint_objects[slot_layer_get_object_mask(layers[0]) - 1].base.name;
	}
	if (!is_udim && !export_selected && object_name != "") {
		f += "_" + object_name;
	}

	// Clear export layer
	g4_begin(base_expa);
	g4_clear(color_from_floats(0.0, 0.0, 0.0, 0.0));
	g4_end();
	g4_begin(base_expb);
	g4_clear(color_from_floats(0.5, 0.5, 1.0, 0.0));
	g4_end();
	g4_begin(base_expc);
	g4_clear(color_from_floats(1.0, 0.0, 0.0, 0.0));
	g4_end();

	// Flatten layers
	for (let l1 of layers) {
		if (!export_selected && !slot_layer_is_visible(l1)) continue;
		if (!slot_layer_is_layer(l1)) continue;

		if (object_name != "" && slot_layer_get_object_mask(l1) > 0) {
			if (is_udim && !project_paint_objects[slot_layer_get_object_mask(l1) - 1].base.name.endsWith(object_name)) continue;
			let per_object: bool = context_raw.layers_export == export_mode_t.PER_OBJECT;
			if (per_object && project_paint_objects[slot_layer_get_object_mask(l1) - 1].base.name != object_name) continue;
		}

		let mask: image_t = empty;
		let l1masks: SlotLayerRaw[] = slot_layer_get_masks(l1);
		if (l1masks != null && !bake_material) {
			if (l1masks.length > 1) {
				base_make_temp_mask_img();
				g2_begin(base_temp_mask_image);
				g2_clear(0x00000000);
				g2_end();
				let l1: any = { texpaint: base_temp_mask_image };
				for (let i: i32 = 0; i < l1masks.length; ++i) {
					base_merge_layer(l1, l1masks[i]);
				}
				mask = base_temp_mask_image;
			}
			else mask = l1masks[0].texpaint;
		}

		if (l1.paint_base) {
			g2_begin(base_temp_image); // Copy to temp
			g2_set_pipeline(base_pipe_copy);
			g2_draw_image(base_expa, 0, 0);
			g2_set_pipeline(null);
			g2_end();

			g4_begin(base_expa);
			g4_set_pipeline(base_pipe_merge);
			g4_set_tex(base_tex0, l1.texpaint);
			g4_set_tex(base_tex1, empty);
			g4_set_tex(base_texmask, mask);
			g4_set_tex(base_texa, base_temp_image);
			g4_set_float(base_opac, slot_layer_get_opacity(l1));
			g4_set_int(base_blending, layers.length > 1 ? l1.blending : 0);
			g4_set_vertex_buffer(const_data_screen_aligned_vb);
			g4_set_index_buffer(const_data_screen_aligned_ib);
			g4_draw();
			g4_end();
		}

		if (l1.paint_nor) {
			g2_begin(base_temp_image);
			g2_set_pipeline(base_pipe_copy);
			g2_draw_image(base_expb, 0, 0);
			g2_set_pipeline(null);
			g2_end();

			g4_begin(base_expb);
			g4_set_pipeline(base_pipe_merge);
			g4_set_tex(base_tex0, l1.texpaint);
			g4_set_tex(base_tex1, l1.texpaint_nor);
			g4_set_tex(base_texmask, mask);
			g4_set_tex(base_texa, base_temp_image);
			g4_set_float(base_opac, slot_layer_get_opacity(l1));
			g4_set_int(base_blending, l1.paint_nor_blend ? -2 : -1);
			g4_set_vertex_buffer(const_data_screen_aligned_vb);
			g4_set_index_buffer(const_data_screen_aligned_ib);
			g4_draw();
			g4_end();
		}

		if (l1.paint_occ || l1.paint_rough || l1.paint_met || l1.paint_height) {
			g2_begin(base_temp_image);
			g2_set_pipeline(base_pipe_copy);
			g2_draw_image(base_expc, 0, 0);
			g2_set_pipeline(null);
			g2_end();

			if (l1.paint_occ && l1.paint_rough && l1.paint_met && l1.paint_height) {
				base_commands_merge_pack(base_pipe_merge, base_expc, l1.texpaint, l1.texpaint_pack, slot_layer_get_opacity(l1), mask, l1.paint_height_blend ? -3 : -1);
			}
			else {
				if (l1.paint_occ) base_commands_merge_pack(base_pipe_merge_r, base_expc, l1.texpaint, l1.texpaint_pack, slot_layer_get_opacity(l1), mask);
				if (l1.paint_rough) base_commands_merge_pack(base_pipe_merge_g, base_expc, l1.texpaint, l1.texpaint_pack, slot_layer_get_opacity(l1), mask);
				if (l1.paint_met) base_commands_merge_pack(base_pipe_merge_b, base_expc, l1.texpaint, l1.texpaint_pack, slot_layer_get_opacity(l1), mask);
			}
		}
	}

	///if krom_metal
	// Flush command list
	g2_begin(base_expa);
	g2_end();
	g2_begin(base_expb);
	g2_end();
	g2_begin(base_expc);
	g2_end();
	///end
	///end

	///if is_paint
	let texpaint: image_t = base_expa;
	let texpaint_nor: image_t = base_expb;
	let texpaint_pack: image_t = base_expc;
	///end

	///if is_lab
	let texpaint: image_t = brush_output_node_inst.texpaint;
	let texpaint_nor: image_t = brush_output_node_inst.texpaint_nor;
	let texpaint_pack: image_t = brush_output_node_inst.texpaint_pack;
	///end

	let pixpaint: ArrayBuffer = null;
	let pixpaint_nor: ArrayBuffer = null;
	let pixpaint_pack: ArrayBuffer = null;
	let preset: export_preset_t = box_export_preset;
	let pix: ArrayBuffer = null;

	for (let t of preset.textures) {
		for (let c of t.channels) {
			if      ((c == "base_r" || c == "base_g" || c == "base_b" || c == "opac") && pixpaint == null) pixpaint = image_get_pixels(texpaint);
			else if ((c == "nor_r" || c == "nor_g" || c == "nor_g_directx" || c == "nor_b" || c == "emis" || c == "subs") && pixpaint_nor == null) pixpaint_nor = image_get_pixels(texpaint_nor);
			else if ((c == "occ" || c == "rough" || c == "metal" || c == "height" || c == "smooth") && pixpaint_pack == null) pixpaint_pack = image_get_pixels(texpaint_pack);
		}
	}

	for (let t of preset.textures) {
		let c: string[] = t.channels;
		let tex_name = t.name != "" ? "_" + t.name : "";
		let single_channel: bool = c[0] == c[1] && c[1] == c[2] && c[3] == "1.0";
		if (c[0] == "base_r" && c[1] == "base_g" && c[2] == "base_b" && c[3] == "1.0" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint, 1);
		}
		else if (c[0] == "nor_r" && c[1] == "nor_g" && c[2] == "nor_b" && c[3] == "1.0" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint_nor, 1);
		}
		else if (c[0] == "occ" && c[1] == "rough" && c[2] == "metal" && c[3] == "1.0" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint_pack, 1);
		}
		else if (single_channel && c[0] == "occ" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint_pack, 2, 0);
		}
		else if (single_channel && c[0] == "rough" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint_pack, 2, 1);
		}
		else if (single_channel && c[0] == "metal" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint_pack, 2, 2);
		}
		else if (single_channel && c[0] == "height" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint_pack, 2, 3);
		}
		else if (single_channel && c[0] == "opac" && t.color_space == "linear") {
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pixpaint, 2, 3);
		}
		else {
			if (pix == null) pix = new ArrayBuffer(texture_size_x * texture_size_y * 4 * math_floor(bits / 8));
			for (let i: i32 = 0; i < 4; ++i) {
				let c: string = t.channels[i];
				if      (c == "base_r") export_texture_copy_channel(new DataView(pixpaint), 0, new DataView(pix), i, t.color_space == "linear");
				else if (c == "base_g") export_texture_copy_channel(new DataView(pixpaint), 1, new DataView(pix), i, t.color_space == "linear");
				else if (c == "base_b") export_texture_copy_channel(new DataView(pixpaint), 2, new DataView(pix), i, t.color_space == "linear");
				else if (c == "height") export_texture_copy_channel(new DataView(pixpaint_pack), 3, new DataView(pix), i, t.color_space == "linear");
				else if (c == "metal") export_texture_copy_channel(new DataView(pixpaint_pack), 2, new DataView(pix), i, t.color_space == "linear");
				else if (c == "nor_r") export_texture_copy_channel(new DataView(pixpaint_nor), 0, new DataView(pix), i, t.color_space == "linear");
				else if (c == "nor_g") export_texture_copy_channel(new DataView(pixpaint_nor), 1, new DataView(pix), i, t.color_space == "linear");
				else if (c == "nor_g_directx") export_texture_copy_channel_inv(new DataView(pixpaint_nor), 1, new DataView(pix), i, t.color_space == "linear");
				else if (c == "nor_b") export_texture_copy_channel(new DataView(pixpaint_nor), 2, new DataView(pix), i, t.color_space == "linear");
				else if (c == "occ") export_texture_copy_channel(new DataView(pixpaint_pack), 0, new DataView(pix), i, t.color_space == "linear");
				else if (c == "opac") export_texture_copy_channel(new DataView(pixpaint), 3, new DataView(pix), i, t.color_space == "linear");
				else if (c == "rough") export_texture_copy_channel(new DataView(pixpaint_pack), 1, new DataView(pix), i, t.color_space == "linear");
				else if (c == "smooth") export_texture_copy_channel_inv(new DataView(pixpaint_pack), 1, new DataView(pix), i, t.color_space == "linear");
				else if (c == "emis") export_texture_extract_channel(new DataView(pixpaint_nor), 3, new DataView(pix), i, 3, 1, t.color_space == "linear");
				else if (c == "subs") export_texture_extract_channel(new DataView(pixpaint_nor), 3, new DataView(pix), i, 3, 2, t.color_space == "linear");
				else if (c == "0.0") export_texture_set_channel(0, new DataView(pix), i);
				else if (c == "1.0") export_texture_set_channel(255, new DataView(pix), i);
			}
			export_texture_write_texture(path + path_sep + f + tex_name + ext, pix, 3);
		}
	}

	// Release staging memory allocated in image_get_pixels()
	texpaint.pixels = null;
	texpaint_nor.pixels = null;
	texpaint_pack.pixels = null;
}

function export_texture_write_texture(file: string, pixels: ArrayBuffer, type: i32 = 1, off: i32 = 0) {
	let res_x: i32 = config_get_texture_res_x();
	let res_y: i32 = config_get_texture_res_y();
	let bits_handle: i32 = base_bits_handle.position;
	let bits: i32 = bits_handle == texture_bits_t.BITS8 ? 8 : bits_handle == texture_bits_t.BITS16 ? 16 : 32;
	let format: i32 = 0; // RGBA
	if (type == 1) format = 2; // RGB1
	if (type == 2 && off == 0) format = 3; // RRR1
	if (type == 2 && off == 1) format = 4; // GGG1
	if (type == 2 && off == 2) format = 5; // BBB1
	if (type == 2 && off == 3) format = 6; // AAA1

	if (context_raw.layers_destination == export_destination_t.PACKED) {
		let image: image_t = image_from_bytes(pixels, res_x, res_y);
		data_cached_images.set(file, image);
		let ar: string[] = file.split(path_sep);
		let name: string = ar[ar.length - 1];
		let asset: asset_t = {name: name, file: file, id: project_asset_id++};
		project_assets.push(asset);
		if (project_raw.assets == null) project_raw.assets = [];
		project_raw.assets.push(asset.file);
		project_asset_names.push(asset.name);
		project_asset_map.set(asset.id, image);
		export_arm_pack_assets(project_raw, [asset]);
		return;
	}

	if (bits == 8 && context_raw.format_type == texture_ldr_format_t.PNG) {
		krom_write_png(file, pixels, res_x, res_y, format);
	}
	else if (bits == 8 && context_raw.format_type == texture_ldr_format_t.JPG) {
		krom_write_jpg(file, pixels, res_x, res_y, format, math_floor(context_raw.format_quality));
	}
	else { // Exr
		let b: ArrayBuffer = parser_exr_run(res_x, res_y, pixels, bits, type, off);
		krom_file_save_bytes(file, b, b.byteLength);
	}
}

function export_texture_copy_channel(from: DataView, from_channel: i32, to: DataView, to_channel: i32, linear: bool = true) {
	for (let i: i32 = 0; i < math_floor(to.byteLength / 4); ++i) {
		to.setUint8(i * 4 + to_channel, from.getUint8(i * 4 + from_channel));
	}
	if (!linear) export_texture_to_srgb(to, to_channel);
}

function export_texture_copy_channel_inv(from: DataView, from_channel: i32, to: DataView, to_channel: i32, linear: bool = true) {
	for (let i: i32 = 0; i < math_floor(to.byteLength / 4); ++i) {
		to.setUint8(i * 4 + to_channel, 255 - from.getUint8(i * 4 + from_channel));
	}
	if (!linear) export_texture_to_srgb(to, to_channel);
}

function export_texture_extract_channel(from: DataView, from_channel: i32, to: DataView, to_channel: i32, step: i32, mask: i32, linear: bool = true) {
	for (let i: i32 = 0; i < math_floor(to.byteLength / 4); ++i) {
		to.setUint8(i * 4 + to_channel, from.getUint8(i * 4 + from_channel) % step == mask ? 255 : 0);
	}
	if (!linear) export_texture_to_srgb(to, to_channel);
}

function export_texture_set_channel(value: i32, to: DataView, to_channel: i32, linear: bool = true) {
	for (let i: i32 = 0; i < math_floor(to.byteLength / 4); ++i) {
		to.setUint8(i * 4 + to_channel, value);
	}
	if (!linear) export_texture_to_srgb(to, to_channel);
}

function export_texture_to_srgb(to: DataView, to_channel: i32) {
	for (let i: i32 = 0; i < math_floor(to.byteLength / 4); ++i) {
		to.setUint8(i * 4 + to_channel, math_floor(math_pow(to.getUint8(i * 4 + to_channel) / 255, export_texture_gamma) * 255));
	}
}

type export_preset_t = {
	textures?: export_preset_texture_t[];
};

type export_preset_texture_t = {
	name?: string;
	channels?: string[];
	color_space?: string;
};

///end