Crafter.Graphics/implementations/Crafter.Graphics-Window_wayland.cpp

/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 3.0 as published by the Free Software Foundation;

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

module;

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/input-event-codes.h>
#include <xkbcommon/xkbcommon.h>
#include "../lib/xdg-shell-client-protocol.h"
#include "../lib/wayland-xdg-decoration-unstable-v1-client-protocol.h"
#include <string.h>
#include <linux/input.h>
#include <sys/mman.h>
#include <wayland-cursor.h>
#include <xkbcommon/xkbcommon.h>
#include <errno.h>
#include <fcntl.h>
#include <print>
#include <wayland-client.h>
#include <wayland-client-protocol.h>

module Crafter.Graphics:Window_wayland_impl;
import :Window;
import :UiElement;
import std;
import :Types;
import :Shm;
import Crafter.Event;

using namespace Crafter;

WindowFramebuffer::WindowFramebuffer(std::uint_fast32_t width,  std::uint_fast32_t height) : width(width), height(height) {

}


void WindowFramebuffer::ScaleElement(Transform& element) {
	element.scaled.width = MappedToPixel(element.relativeWidth, width);
	element.scaled.height = MappedToPixel(element.relativeHeight, height);
	element.scaled.x = MappedToPixel(element.anchorX, width) - MappedToPixel(element.anchorOffsetX, element.scaled.width);
	element.scaled.y = MappedToPixel(element.anchorY, height) - MappedToPixel(element.anchorOffsetY, element.scaled.height);
}

void WindowFramebuffer::ScaleElement(Transform& element, Transform& parent) {
	element.scaled.width = MappedToPixel(element.relativeWidth, parent.scaled.width);
	element.scaled.height = MappedToPixel(element.relativeHeight, parent.scaled.height);
	element.scaled.x = MappedToPixel(element.anchorX, parent.scaled.width) - MappedToPixel(element.anchorOffsetX, element.scaled.width) + parent.scaled.x;
	element.scaled.y = MappedToPixel(element.anchorY, parent.scaled.height) - MappedToPixel(element.anchorOffsetY, element.scaled.height) + parent.scaled.y;
}

void WindowFramebuffer::ScaleMouse(Transform& element, Transform& parent) {
	std::int_fast32_t boundlessWidth = PixelToMappedBoundless(parent.scaled.width, width);
	std::int_fast32_t boundlessHeight = PixelToMappedBoundless(parent.scaled.height, height);
	element.scaled.width = BoundToBoundless(MappedToPixel(element.relativeWidth, PixelToMapped(parent.scaled.width, width)));
	element.scaled.height = BoundToBoundless(MappedToPixel(element.relativeHeight, PixelToMapped(parent.scaled.height, height)));
	element.scaled.x = MappedToPixelBoundless(element.anchorX, boundlessWidth) - MappedToPixelBoundless(element.anchorOffsetX, element.scaled.width) + PixelToMappedBoundless(parent.scaled.x, width);
	element.scaled.y = MappedToPixelBoundless(element.anchorY, boundlessHeight) - MappedToPixelBoundless(element.anchorOffsetY, element.scaled.height) + PixelToMappedBoundless(parent.scaled.y, height);
}

WindowWayland::WindowWayland(std::uint_fast32_t width, std::uint_fast32_t height) : WindowFramebuffer(width, height) {
	display = wl_display_connect(NULL);
	if (display == NULL) {
		std::cerr <<  "failed to create display" << std::endl;
	}
	
	wl_registry* registry = wl_display_get_registry(display);
	wl_registry_add_listener(registry, &registry_listener, this);
	if (wl_display_roundtrip(display) == -1) {
		exit(EXIT_FAILURE);
	}
	if (shm == NULL || compositor == NULL || xdgWmBase == NULL) {
		std::cerr << "no wl_shm, wl_compositor or xdg_wm_base support" << std::endl;
		exit(EXIT_FAILURE);
	}

	surface = wl_compositor_create_surface(compositor);
	xdgSurface = xdg_wm_base_get_xdg_surface(xdgWmBase, surface);
	xdgToplevel = xdg_surface_get_toplevel(xdgSurface);

	xdg_surface_add_listener(xdgSurface, &xdg_surface_listener, this);
	xdg_toplevel_add_listener(xdgToplevel, &xdg_toplevel_listener, this);
	wl_surface_commit(surface);

	while (wl_display_dispatch(display) != -1 && !configured) {}

	wl_surface_commit(surface);

	zxdg_toplevel_decoration_v1* decoration = zxdg_decoration_manager_v1_get_toplevel_decoration(manager, xdgToplevel);
	zxdg_toplevel_decoration_v1_set_mode(decoration, ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);

	// Create a wl_buffer, attach it to the surface and commit the surface
	int stride = width * 4;
	int size = stride * height;

	// Allocate a shared memory file with the right size
	int fd = create_shm_file(size);
	if (fd < 0) {
		fprintf(stderr, "creating a buffer file for %d B failed: %m\n", size);
	}

	// Map the shared memory file
	framebuffer = reinterpret_cast<Pixel_BU8_GU8_RU8_AU8*>(mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
	if (framebuffer == MAP_FAILED) {
		fprintf(stderr, "mmap failed: %m\n");
		close(fd);
	}

	// Create a wl_buffer from our shared memory file descriptor
	wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
	buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride, WL_SHM_FORMAT_ARGB8888);
	wl_shm_pool_destroy(pool);

	// Now that we've mapped the file and created the wl_buffer, we no longer
	// need to keep file descriptor opened
	close(fd);

	if (buffer == NULL) {
		exit(EXIT_FAILURE);
	}

	wl_surface_attach(surface, buffer, 0, 0);
	wl_surface_commit(surface);
}

WindowWayland::WindowWayland(std::uint_fast32_t width, std::uint_fast32_t height, const std::string_view title) : WindowWayland(width, height) {
    xdg_toplevel_set_title(xdgToplevel, title.data());
}

WindowWayland::~WindowWayland() {
	xdg_toplevel_destroy(xdgToplevel);
	xdg_surface_destroy(xdgSurface);
	wl_surface_destroy(surface);
	wl_buffer_destroy(buffer);
}

void WindowWayland::StartSync() {
	while (open && wl_display_dispatch(display) != -1) {

	}
}



void RenderElement(UiElementBufferBuffer* element, WindowWayland* window) {
    std::vector<Pixel_BU8_GU8_RU8_AU8> scaled(element->transform.scaled.width*element->transform.scaled.height);
    element->CopyNearestNeighbour(scaled.data(), element->transform.scaled.width, element->transform.scaled.height);

    for (std::int_fast32_t x = element->transform.scaled.x; x - element->transform.scaled.x < element->transform.scaled.width; x++) {
        for (std::int_fast32_t y = element->transform.scaled.y; y - element->transform.scaled.y < element->transform.scaled.height; y++) {
            if (x >= 0 && x <  window->width && y >= 0 && y <  window->height) {
                Pixel_BU8_GU8_RU8_AU8& dst = window->framebuffer[y * window->width + x];
                const Pixel_BU8_GU8_RU8_AU8& src = scaled[(y - element->transform.scaled.y) * element->transform.scaled.width + (x - element->transform.scaled.x)];

                float srcA = src.a / 255.0f;
                float dstA = dst.a / 255.0f;

                float outA = srcA + dstA * (1.0f - srcA);
                if (outA > 0.0f) {
                    dst.r = static_cast<uint8_t>((src.r * srcA + dst.r * dstA * (1.0f - srcA)) / outA);
                    dst.g = static_cast<uint8_t>((src.g * srcA + dst.g * dstA * (1.0f - srcA)) / outA);
                    dst.b = static_cast<uint8_t>((src.b * srcA + dst.b * dstA * (1.0f - srcA)) / outA);
                    dst.a = static_cast<uint8_t>(outA * 255);
                }
            }
        }
    }
    std::sort(element->children.begin(), element->children.end(), [](UiElement* a, UiElement* b){ return a->transform.z < b->transform.z; });
    for(UiElement* child : element->children) {
		RenderElement(static_cast<UiElementBufferBuffer*>(child), window);
	}
}

void WindowWayland::Render() {
	std::sort(elements.begin(), elements.end(), [](UiElementBufferBuffer* a, UiElementBufferBuffer* b){ return a->transform.z < b->transform.z; });

	for (std::int_fast32_t x = 0; x < width; x++) {
        for (std::int_fast32_t y = 0; y - height; y++) {
			framebuffer[y * width + x] = {0,0,0,0};
		}
	}

	for(UiElementBufferBuffer* element : elements) {
		RenderElement(element, this);
	}

    wl_surface_attach(surface, buffer, 0, 0);
	wl_surface_damage(surface, 0, 0, width, height);
	wl_surface_commit(surface);
}

void WindowWayland::StartUpdate() {
    cb = wl_surface_frame(surface);
	wl_callback_add_listener(cb, &wl_callback_listener, this);
    updating = true;
}

void WindowWayland::StopUpdate() {
    updating = false;
}

void WindowWayland::SetTitle(const std::string_view title) {
    xdg_toplevel_set_title(xdgToplevel, title.data());
}

void WindowWayland::Resize(std::uint_fast32_t width, std::uint_fast32_t height) {

}

void WindowWayland::Write(Pixel_BU8_GU8_RU8_AU8* pixels) {
    std::memcpy(framebuffer, pixels, width*height*sizeof(Pixel_BU8_GU8_RU8_AU8));
}

void WindowWayland::Write(std::uint_fast32_t x, std::uint_fast32_t y, Pixel_BU8_GU8_RU8_AU8 pixel) {
framebuffer[y * width + x] = pixel;
}

Pixel_BU8_GU8_RU8_AU8 WindowWayland::Read(std::uint_fast32_t x, std::uint_fast32_t y) const{
    return framebuffer[y * width + x];
}

const Pixel_BU8_GU8_RU8_AU8* WindowWayland::Read() const{
    return framebuffer;
}

Pixel_BU8_GU8_RU8_AU8* WindowWayland::Get() {
    return framebuffer;
}

void WindowWayland::Store() {

}

void WindowWayland::xdg_wm_base_handle_ping(void* data, xdg_wm_base* xdg_wm_base, std::uint32_t serial) {
	xdg_wm_base_pong(xdg_wm_base, serial);
}

void WindowWayland::wl_surface_frame_done(void* data, struct wl_callback *cb, uint32_t time)
{
	wl_callback_destroy(cb);
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);

	auto start = std::chrono::high_resolution_clock::now();

    if(window->updating) {
        cb = wl_surface_frame(window->surface);
	    wl_callback_add_listener(cb, &WindowWayland::wl_callback_listener, window);
		window->onUpdate.Invoke({start, start-window->lastFrameEnd});
    }

    window->Render();

	window->lastFrameEnd = start;
}

void WindowWayland::pointer_handle_button(void* data, wl_pointer* pointer, std::uint32_t serial, std::uint32_t time, std::uint32_t button, std::uint32_t state) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	if (button == BTN_LEFT) {
		if(state == WL_POINTER_BUTTON_STATE_PRESSED) {
			window->mouseLeftHeld = true;
			window->onMouseLeftClick.Invoke(window->currentMousePos);	
			for(UiElementMouse* element : window->mouseElements) {
				if(window->currentMousePos.x >= element->transform.scaled.x && window->currentMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->currentMousePos.y > element->transform.scaled.y && window->currentMousePos.y < element->transform.scaled.y+element->transform.scaled.height) {
					element->onMouseLeftClick.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
				}
			}
		} else {
			window->mouseLeftHeld = false;
			window->onMouseLeftRelease.Invoke(window->currentMousePos);	
			for(UiElementMouse* element : window->mouseElements) {
				if(window->currentMousePos.x >= element->transform.scaled.x && window->currentMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->currentMousePos.y > element->transform.scaled.y && window->currentMousePos.y < element->transform.scaled.y+element->transform.scaled.height) {
					element->onMouseLeftRelease.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
				}
			}
		}
	} else if(button == BTN_RIGHT){
		if(state == WL_POINTER_BUTTON_STATE_PRESSED) {
			window->mouseRightHeld = true;
			window->onMouseRightClick.Invoke(window->currentMousePos);
			for(UiElementMouse* element : window->mouseElements) {
				if(window->currentMousePos.x >= element->transform.scaled.x && window->currentMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->currentMousePos.y > element->transform.scaled.y && window->currentMousePos.y < element->transform.scaled.y+element->transform.scaled.height) {
					element->onMouseRightClick.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
				}
			}	
		} else {
			window->mouseRightHeld = true;
			window->onMouseRightRelease.Invoke(window->currentMousePos);
			for(UiElementMouse* element : window->mouseElements) {
				if(window->currentMousePos.x >= element->transform.scaled.x && window->currentMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->currentMousePos.y > element->transform.scaled.y && window->currentMousePos.y < element->transform.scaled.y+element->transform.scaled.height) {
					element->onMouseRightRelease.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
				}
			}		
		}
	}
}

void WindowWayland::PointerListenerHandleMotion(void* data, wl_pointer* wl_pointer, uint time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	MousePoint pos = {FractionalToMappedBoundless(wl_fixed_to_double(surface_x) / window->width), FractionalToMappedBoundless(wl_fixed_to_double(surface_y) / window->height)};
	window->lastMousePos = window->currentMousePos;
	window->currentMousePos = pos;
	window->mouseDelta = {window->currentMousePos.x-window->lastMousePos.x, window->currentMousePos.y-window->lastMousePos.y};
	window->onMouseMove.Invoke({window->lastMousePos, window->currentMousePos, window->mouseDelta});
	for(UiElementMouse* element : window->mouseElements) {
		if(window->currentMousePos.x >= element->transform.scaled.x && window->currentMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->currentMousePos.y > element->transform.scaled.y && window->currentMousePos.y < element->transform.scaled.y+element->transform.scaled.height) {
			element->onMouseMove.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
			if(!(window->lastMousePos.x >= element->transform.scaled.x && window->lastMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->lastMousePos.y > element->transform.scaled.y && window->lastMousePos.y < element->transform.scaled.y+element->transform.scaled.height)) {
				element->onMouseEnter.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
			}
		} else if(window->lastMousePos.x >= element->transform.scaled.x && window->lastMousePos.x <= element->transform.scaled.x+element->transform.scaled.width && window->lastMousePos.y > element->transform.scaled.y && window->lastMousePos.y < element->transform.scaled.y+element->transform.scaled.height) {
			element->onMouseLeave.Invoke({FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.x - element->transform.scaled.x) / element->transform.scaled.width), FractionalToMappedBoundless(static_cast<double>(window->currentMousePos.y - element->transform.scaled.y) / element->transform.scaled.height)});
		}
	}	
}

void WindowWayland::PointerListenerHandleEnter(void* data, wl_pointer* wl_pointer, uint serial, wl_surface* surface, wl_fixed_t surface_x, wl_fixed_t surface_y) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	window->onMouseEnter.Invoke({window->lastMousePos, window->currentMousePos, window->mouseDelta});
}

void WindowWayland::PointerListenerHandleLeave(void* data, wl_pointer*, std::uint32_t, wl_surface*) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	window->onMouseEnter.Invoke({window->lastMousePos, window->currentMousePos, window->mouseDelta});
}

void WindowWayland::PointerListenerHandleAxis(void*, wl_pointer*, std::uint32_t, std::uint32_t, wl_fixed_t value) {

}


void WindowWayland::keyboard_keymap(void *data, wl_keyboard *keyboard, uint32_t format, int fd, uint32_t size) {
    WindowWayland* window = reinterpret_cast<WindowWayland*>(data);

	if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
        close(fd);
        fprintf(stderr, "Unsupported keymap format\n");
        return;
    }

    void *map = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
    if (map == MAP_FAILED) {
        close(fd);
        perror("mmap");
        return;
    }

    window->xkb_context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
    window->xkb_keymap = xkb_keymap_new_from_string(window->xkb_context, (const char *)map, XKB_KEYMAP_FORMAT_TEXT_V1,XKB_KEYMAP_COMPILE_NO_FLAGS);
    munmap(map, size);
    close(fd);

    window->xkb_state = xkb_state_new(window->xkb_keymap);
}

void WindowWayland::keyboard_enter(void *data, wl_keyboard *keyboard, uint32_t serial, wl_surface *surface, wl_array *keys) {

}

void WindowWayland::keyboard_leave(void *data, wl_keyboard *keyboard, uint32_t serial, wl_surface *surface) {

}

void WindowWayland::keyboard_key(void *data, wl_keyboard *keyboard, uint32_t serial, uint32_t time, uint32_t key, uint32_t state) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);

    if (!window->xkb_state) {
		return;
	}

	xkb_keycode_t keycode = key + 8;
	xkb_keysym_t keysym = xkb_state_key_get_one_sym(window->xkb_state, keycode);

	char utf8[8] = {0};
	int len = xkb_keysym_to_utf8(keysym, utf8, sizeof(utf8));
	if (len != 0) {
		char keypress = utf8[0];
		if(state == WL_KEYBOARD_KEY_STATE_PRESSED) {
			if(window->heldkeys[keypress]) {
				window->onKeyHold[keypress].Invoke();
				window->onAnyKeyHold.Invoke(keypress);
			} else{
				window->heldkeys[keypress] = true;
				window->onKeyDown[keypress].Invoke();
				window->onAnyKeyDown.Invoke(keypress);
			}
		} else{
			window->heldkeys[keypress] = false;
			window->onKeyUp[keypress].Invoke();
			window->onAnyKeyUp.Invoke(keypress);
		}
		
	} else {
		// // fallback for keys like Return, Escape, etc.
		// char name[64];
		// if (xkb_keysym_get_name(keysym, name, sizeof(name)) > 0) {
		// 	printf("Key %s pressed (non-printable or multi-char)\n", name);
		// }
	}
}

void WindowWayland::keyboard_modifiers(void *data, wl_keyboard *keyboard, uint32_t serial, uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked, uint32_t group) {

}

void WindowWayland::keyboard_repeat_info(void *data, wl_keyboard *keyboard, int32_t rate, int32_t delay) {

}

void WindowWayland::seat_handle_capabilities(void* data, wl_seat* seat, uint32_t capabilities) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	window->seat = seat;
	if (capabilities & WL_SEAT_CAPABILITY_POINTER) {
		wl_pointer* pointer = wl_seat_get_pointer(seat);
		wl_pointer_add_listener(pointer, &pointer_listener, window);
	}
	if (capabilities & WL_SEAT_CAPABILITY_KEYBOARD) {
        wl_keyboard* keyboard = wl_seat_get_keyboard(seat);
        wl_keyboard_add_listener(keyboard, &keyboard_listener, window);
    }
}

void WindowWayland::handle_global(void *data, wl_registry *registry, std::uint32_t name, const char *interface, std::uint32_t version) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	if (strcmp(interface, wl_shm_interface.name) == 0) {
		window->shm = reinterpret_cast<wl_shm*>(wl_registry_bind(registry, name, &wl_shm_interface, 1));
	} else if (strcmp(interface, wl_seat_interface.name) == 0) {
		wl_seat* seat = reinterpret_cast<wl_seat*>(wl_registry_bind(registry, name, &wl_seat_interface, 1));
		wl_seat_add_listener(seat, &seat_listener, window);
	} else if (compositor == NULL && strcmp(interface, wl_compositor_interface.name) == 0) {
		compositor =  reinterpret_cast<wl_compositor*>(wl_registry_bind(registry, name, &wl_compositor_interface, 1));
	} else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
		window->xdgWmBase = reinterpret_cast<xdg_wm_base*>(wl_registry_bind(registry, name, &xdg_wm_base_interface, 1));
		xdg_wm_base_add_listener(window->xdgWmBase, &xdgWmBaseListener, NULL);
	} else if (strcmp(interface, zxdg_decoration_manager_v1_interface.name) == 0) {
		window->manager = reinterpret_cast<zxdg_decoration_manager_v1*>(wl_registry_bind(registry, name, &zxdg_decoration_manager_v1_interface, 1));
	}
}

void WindowWayland::handle_global_remove(void* data, wl_registry* registry, uint32_t name) {

	
}

void WindowWayland::xdg_toplevel_configure(void*, xdg_toplevel*, std::int32_t, std::int32_t, wl_array*){
	
}

void WindowWayland::xdg_toplevel_handle_close(void* data, xdg_toplevel*) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	window->onClose.Invoke();
	window->open = false;
}

void WindowWayland::xdg_surface_handle_configure(void* data, xdg_surface* xdg_surface, std::uint32_t serial) {
	WindowWayland* window = reinterpret_cast<WindowWayland*>(data);
	// The compositor configures our surface, acknowledge the configure event
	xdg_surface_ack_configure(xdg_surface, serial);

	if (window->configured) {
		// If this isn't the first configure event we've received, we already
		// have a buffer attached, so no need to do anything. Commit the
		// surface to apply the configure acknowledgement.
		wl_surface_commit(window->surface);
	}

	window->configured = true;
}