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wl_window.c
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Camilla Löwy authoredCamilla Löwy authored
wl_window.c 22.49 KiB
//========================================================================
// GLFW 3.2 Wayland - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2014 Jonas Ådahl <jadahl@gmail.com>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#define _GNU_SOURCE
#include "internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <poll.h>
#include <wayland-egl.h>
#include <wayland-cursor.h>
static void handlePing(void* data,
struct wl_shell_surface* shellSurface,
uint32_t serial)
{
wl_shell_surface_pong(shellSurface, serial);
}
static void handleConfigure(void* data,
struct wl_shell_surface* shellSurface,
uint32_t edges,
int32_t width,
int32_t height)
{
_GLFWwindow* window = data;
_glfwInputFramebufferSize(window, width, height);
_glfwInputWindowSize(window, width, height);
_glfwPlatformSetWindowSize(window, width, height);
_glfwInputWindowDamage(window);
}
static void handlePopupDone(void* data,
struct wl_shell_surface* shellSurface)
{
}
static const struct wl_shell_surface_listener shellSurfaceListener = {
handlePing, handleConfigure,
handlePopupDone
};
static void checkScaleChange(_GLFWwindow* window)
{
int scaledWidth, scaledHeight;
int scale = 1;
int i;
int monitorScale;
// Check if we will be able to set the buffer scale or not.
if (_glfw.wl.wl_compositor_version < 3)
return;
// Get the scale factor from the highest scale monitor.
for (i = 0; i < window->wl.monitorsCount; ++i)
{
monitorScale = window->wl.monitors[i]->wl.scale;
if (scale < monitorScale)
scale = monitorScale;
}
// Only change the framebuffer size if the scale changed.
if (scale != window->wl.scale)
{
window->wl.scale = scale;
scaledWidth = window->wl.width * scale;
scaledHeight = window->wl.height * scale;
wl_surface_set_buffer_scale(window->wl.surface, scale);
wl_egl_window_resize(window->wl.native, scaledWidth, scaledHeight, 0, 0);
_glfwInputFramebufferSize(window, scaledWidth, scaledHeight);
}
}
static void handleEnter(void *data,
struct wl_surface *surface,
struct wl_output *output)
{
_GLFWwindow* window = data;
_GLFWmonitor* monitor = wl_output_get_user_data(output);
if (window->wl.monitorsCount + 1 > window->wl.monitorsSize)
{
++window->wl.monitorsSize;
window->wl.monitors =
realloc(window->wl.monitors,
window->wl.monitorsSize * sizeof(_GLFWmonitor*));
}
window->wl.monitors[window->wl.monitorsCount++] = monitor;
checkScaleChange(window);
}
static void handleLeave(void *data,
struct wl_surface *surface,
struct wl_output *output)
{
_GLFWwindow* window = data;
_GLFWmonitor* monitor = wl_output_get_user_data(output);
GLFWbool found;
int i;
for (i = 0, found = GLFW_FALSE; i < window->wl.monitorsCount - 1; ++i)
{
if (monitor == window->wl.monitors[i])
found = GLFW_TRUE;
if (found)
window->wl.monitors[i] = window->wl.monitors[i + 1]; }
window->wl.monitors[--window->wl.monitorsCount] = NULL;
checkScaleChange(window);
}
static const struct wl_surface_listener surfaceListener = {
handleEnter,
handleLeave
};
static GLFWbool createSurface(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig)
{
window->wl.surface = wl_compositor_create_surface(_glfw.wl.compositor);
if (!window->wl.surface)
return GLFW_FALSE;
wl_surface_add_listener(window->wl.surface,
&surfaceListener,
window);
wl_surface_set_user_data(window->wl.surface, window);
window->wl.native = wl_egl_window_create(window->wl.surface,
wndconfig->width,
wndconfig->height);
if (!window->wl.native)
return GLFW_FALSE;
window->wl.shell_surface = wl_shell_get_shell_surface(_glfw.wl.shell,
window->wl.surface);
if (!window->wl.shell_surface)
return GLFW_FALSE;
wl_shell_surface_add_listener(window->wl.shell_surface,
&shellSurfaceListener,
window);
window->wl.width = wndconfig->width;
window->wl.height = wndconfig->height;
window->wl.scale = 1;
return GLFW_TRUE;
}
static int
createTmpfileCloexec(char* tmpname)
{
int fd;
fd = mkostemp(tmpname, O_CLOEXEC);
if (fd >= 0)
unlink(tmpname);
return fd;
}
static void
handleEvents(int timeout)
{
struct wl_display* display = _glfw.wl.display;
struct pollfd fds[] = {
{ wl_display_get_fd(display), POLLIN },
};
while (wl_display_prepare_read(display) != 0)
wl_display_dispatch_pending(display);
// If an error different from EAGAIN happens, we have likely been // disconnected from the Wayland session, try to handle that the best we
// can.
if (wl_display_flush(display) < 0 && errno != EAGAIN)
{
_GLFWwindow* window = _glfw.windowListHead;
while (window)
{
_glfwInputWindowCloseRequest(window);
window = window->next;
}
wl_display_cancel_read(display);
return;
}
if (poll(fds, 1, timeout) > 0)
{
wl_display_read_events(display);
wl_display_dispatch_pending(display);
}
else
{
wl_display_cancel_read(display);
}
}
/*
* Create a new, unique, anonymous file of the given size, and
* return the file descriptor for it. The file descriptor is set
* CLOEXEC. The file is immediately suitable for mmap()'ing
* the given size at offset zero.
*
* The file should not have a permanent backing store like a disk,
* but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
*
* The file name is deleted from the file system.
*
* The file is suitable for buffer sharing between processes by
* transmitting the file descriptor over Unix sockets using the
* SCM_RIGHTS methods.
*
* posix_fallocate() is used to guarantee that disk space is available
* for the file at the given size. If disk space is insufficent, errno
* is set to ENOSPC. If posix_fallocate() is not supported, program may
* receive SIGBUS on accessing mmap()'ed file contents instead.
*/
int
createAnonymousFile(off_t size)
{
static const char template[] = "/glfw-shared-XXXXXX";
const char* path;
char* name;
int fd;
int ret;
path = getenv("XDG_RUNTIME_DIR");
if (!path)
{
errno = ENOENT;
return -1;
}
name = calloc(strlen(path) + sizeof(template), 1);
strcpy(name, path);
strcat(name, template);
fd = createTmpfileCloexec(name);
free(name);
if (fd < 0) return -1;
ret = posix_fallocate(fd, 0, size);
if (ret != 0)
{
close(fd);
errno = ret;
return -1;
}
return fd;
}
// Translates a GLFW standard cursor to a theme cursor name
//
static char *translateCursorShape(int shape)
{
switch (shape)
{
case GLFW_ARROW_CURSOR:
return "left_ptr";
case GLFW_IBEAM_CURSOR:
return "xterm";
case GLFW_CROSSHAIR_CURSOR:
return "crosshair";
case GLFW_HAND_CURSOR:
return "grabbing";
case GLFW_HRESIZE_CURSOR:
return "sb_h_double_arrow";
case GLFW_VRESIZE_CURSOR:
return "sb_v_double_arrow";
}
return NULL;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
int _glfwPlatformCreateWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
if (!createSurface(window, wndconfig))
return GLFW_FALSE;
if (ctxconfig->api != GLFW_NO_API)
{
if (!_glfwCreateContextEGL(window, ctxconfig, fbconfig))
return GLFW_FALSE;
}
if (wndconfig->monitor)
{
wl_shell_surface_set_fullscreen(
window->wl.shell_surface,
WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
0,
wndconfig->monitor->wl.output);
}
else
{
wl_shell_surface_set_toplevel(window->wl.shell_surface);
}
window->wl.currentCursor = NULL;
window->wl.monitors = calloc(1, sizeof(_GLFWmonitor*));
window->wl.monitorsCount = 0;
window->wl.monitorsSize = 1;
return GLFW_TRUE;
}
void _glfwPlatformDestroyWindow(_GLFWwindow* window)
{
if (window == _glfw.wl.pointerFocus)
{
_glfw.wl.pointerFocus = NULL;
_glfwInputCursorEnter(window, GLFW_FALSE);
}
if (window == _glfw.wl.keyboardFocus)
{
_glfw.wl.keyboardFocus = NULL;
_glfwInputWindowFocus(window, GLFW_FALSE);
}
_glfwDestroyContextEGL(window);
if (window->wl.native)
wl_egl_window_destroy(window->wl.native);
if (window->wl.shell_surface)
wl_shell_surface_destroy(window->wl.shell_surface);
if (window->wl.surface)
wl_surface_destroy(window->wl.surface);
free(window->wl.monitors);
}
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
{
wl_shell_surface_set_title(window->wl.shell_surface, title);
}
void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
{
// A Wayland client is not aware of its position, so just warn and leave it
// as (0, 0)
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Window position retrieval not supported");
}
void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos)
{
// A Wayland client can not set its position, so just warn
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Window position setting not supported");
}
void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
{
if (width)
*width = window->wl.width;
if (height)
*height = window->wl.height;
}
void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
{
int scaledWidth = width * window->wl.scale;
int scaledHeight = height * window->wl.scale;
window->wl.width = width;
window->wl.height = height;
wl_egl_window_resize(window->wl.native, scaledWidth, scaledHeight, 0, 0);
_glfwInputFramebufferSize(window, scaledWidth, scaledHeight);
}
void _glfwPlatformSetWindowSizeLimits(_GLFWwindow* window,
int minwidth, int minheight,
int maxwidth, int maxheight)
{
// TODO
fprintf(stderr, "_glfwPlatformSetWindowSizeLimits not implemented yet\n");
}
void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window, int numer, int denom)
{
// TODO
fprintf(stderr, "_glfwPlatformSetWindowAspectRatio not implemented yet\n");
}
void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* height)
{
_glfwPlatformGetWindowSize(window, width, height);
*width *= window->wl.scale;
*height *= window->wl.scale;
}
void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
int* left, int* top,
int* right, int* bottom)
{
// TODO
fprintf(stderr, "_glfwPlatformGetWindowFrameSize not implemented yet\n");
}
void _glfwPlatformIconifyWindow(_GLFWwindow* window)
{
// TODO
fprintf(stderr, "_glfwPlatformIconifyWindow not implemented yet\n");
}
void _glfwPlatformRestoreWindow(_GLFWwindow* window)
{
// TODO
fprintf(stderr, "_glfwPlatformRestoreWindow not implemented yet\n");
}
void _glfwPlatformShowWindow(_GLFWwindow* window)
{
wl_shell_surface_set_toplevel(window->wl.shell_surface);
}
void _glfwPlatformUnhideWindow(_GLFWwindow* window)
{
// TODO
fprintf(stderr, "_glfwPlatformUnhideWindow not implemented yet\n");
}
void _glfwPlatformHideWindow(_GLFWwindow* window)
{
wl_surface_attach(window->wl.surface, NULL, 0, 0);
wl_surface_commit(window->wl.surface);
}
int _glfwPlatformWindowFocused(_GLFWwindow* window)
{
// TODO
return GLFW_FALSE;
}
int _glfwPlatformWindowIconified(_GLFWwindow* window)
{
// TODO
return GLFW_FALSE;
}
int _glfwPlatformWindowVisible(_GLFWwindow* window)
{
// TODO
return GLFW_FALSE;
}
void _glfwPlatformPollEvents(void)
{
handleEvents(0);
}
void _glfwPlatformWaitEvents(void)
{
handleEvents(-1);
}
void _glfwPlatformPostEmptyEvent(void)
{
wl_display_sync(_glfw.wl.display);
}
void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos)
{
if (xpos)
*xpos = window->wl.cursorPosX;
if (ypos)
*ypos = window->wl.cursorPosY;
}
void _glfwPlatformSetCursorPos(_GLFWwindow* window, double x, double y)
{
// A Wayland client can not set the cursor position
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Cursor position setting not supported");
}
void _glfwPlatformSetCursorMode(_GLFWwindow* window, int mode)
{
_glfwPlatformSetCursor(window, window->wl.currentCursor);
}
const char* _glfwPlatformGetKeyName(int key, int scancode)
{
// TODO
return NULL;
}
int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
const GLFWimage* image,
int xhot, int yhot)
{
struct wl_shm_pool* pool;
int stride = image->width * 4;
int length = image->width * image->height * 4;
void* data;
int fd, i;
fd = createAnonymousFile(length);
if (fd < 0)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Creating a buffer file for %d B failed: %m\n",
length);
return GLFW_FALSE;
}
data = mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "Wayland: Cursor mmap failed: %m\n");
close(fd);
return GLFW_FALSE;
}
pool = wl_shm_create_pool(_glfw.wl.shm, fd, length);
close(fd);
unsigned char* source = (unsigned char*) image->pixels;
unsigned char* target = data;
for (i = 0; i < image->width * image->height; i++, source += 4)
{
*target++ = source[2];
*target++ = source[1];
*target++ = source[0];
*target++ = source[3];
}
cursor->wl.buffer =
wl_shm_pool_create_buffer(pool, 0,
image->width,
image->height,
stride, WL_SHM_FORMAT_ARGB8888);
munmap(data, length);
wl_shm_pool_destroy(pool);
cursor->wl.width = image->width;
cursor->wl.height = image->height;
cursor->wl.xhot = xhot;
cursor->wl.yhot = yhot;
return GLFW_TRUE;
}
int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, int shape)
{
struct wl_cursor* standardCursor;
standardCursor = wl_cursor_theme_get_cursor(_glfw.wl.cursorTheme,
translateCursorShape(shape));
if (!standardCursor)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Standard cursor \"%s\" not found",
translateCursorShape(shape));
return GLFW_FALSE;
}
cursor->wl.image = standardCursor->images[0];
return GLFW_TRUE;
}
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
{
// If it's a standard cursor we don't need to do anything here
if (cursor->wl.image)
return;
if (cursor->wl.buffer)
wl_buffer_destroy(cursor->wl.buffer);
}
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
{
struct wl_buffer* buffer;
struct wl_cursor* defaultCursor;
struct wl_cursor_image* image;
struct wl_surface* surface = _glfw.wl.cursorSurface;
if (!_glfw.wl.pointer)
return;
window->wl.currentCursor = cursor;
// If we're not in the correct window just save the cursor
// the next time the pointer enters the window the cursor will change
if (window != _glfw.wl.pointerFocus)
return;
if (window->cursorMode == GLFW_CURSOR_NORMAL)
{
if (cursor)
image = cursor->wl.image;
else
{
defaultCursor = wl_cursor_theme_get_cursor(_glfw.wl.cursorTheme,
"left_ptr");
if (!defaultCursor)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Standard cursor not found");
return;
}
image = defaultCursor->images[0];
}
if (image)
{
buffer = wl_cursor_image_get_buffer(image);
if (!buffer)
return;
wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial,
surface,
image->hotspot_x,
image->hotspot_y);
wl_surface_attach(surface, buffer, 0, 0);
wl_surface_damage(surface, 0, 0,
image->width, image->height);
wl_surface_commit(surface);
}
else
{
wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial,
surface,
cursor->wl.xhot,
cursor->wl.yhot);
wl_surface_attach(surface, cursor->wl.buffer, 0, 0);
wl_surface_damage(surface, 0, 0,
cursor->wl.width, cursor->wl.height);
wl_surface_commit(surface);
}
}
else /* Cursor is hidden set cursor surface to NULL */
{
wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial, NULL, 0, 0);
}
}
void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
{
// TODO
fprintf(stderr, "_glfwPlatformSetClipboardString not implemented yet\n");
}
const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
{
// TODO
fprintf(stderr, "_glfwPlatformGetClipboardString not implemented yet\n");
return NULL;
}
char** _glfwPlatformGetRequiredInstanceExtensions(int* count)
{
char** extensions;
*count = 0;
if (!_glfw.vk.KHR_wayland_surface)
return NULL;
extensions = calloc(2, sizeof(char*));
extensions[0] = strdup("VK_KHR_surface");
extensions[1] = strdup("VK_KHR_wayland_surface");
*count = 2;
return extensions;
}
int _glfwPlatformGetPhysicalDevicePresentationSupport(VkInstance instance,
VkPhysicalDevice device,
unsigned int queuefamily)
{
PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR vkGetPhysicalDeviceWaylandPresentationSupportKHR =
(PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR)
vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceWaylandPresentationSupportKHR");
if (!vkGetPhysicalDeviceWaylandPresentationSupportKHR)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"Wayland: Vulkan instance missing VK_KHR_wayland_surface extension");
return VK_NULL_HANDLE;
}
return vkGetPhysicalDeviceWaylandPresentationSupportKHR(device,
queuefamily,
_glfw.wl.display);
}
VkResult _glfwPlatformCreateWindowSurface(VkInstance instance,
_GLFWwindow* window,
const VkAllocationCallbacks* allocator,
VkSurfaceKHR* surface)
{
VkResult err;
VkWaylandSurfaceCreateInfoKHR sci;
PFN_vkCreateWaylandSurfaceKHR vkCreateWaylandSurfaceKHR;
vkCreateWaylandSurfaceKHR = (PFN_vkCreateWaylandSurfaceKHR)
vkGetInstanceProcAddr(instance, "vkCreateWaylandSurfaceKHR");
if (!vkCreateWaylandSurfaceKHR)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"Wayland: Vulkan instance missing VK_KHR_wayland_surface extension");
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
memset(&sci, 0, sizeof(sci));
sci.sType = VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR;
sci.display = _glfw.wl.display;
sci.surface = window->wl.surface;
err = vkCreateWaylandSurfaceKHR(instance, &sci, allocator, surface);
if (err)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Failed to create Vulkan surface: %s",
_glfwGetVulkanResultString(err));
}
return err;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI struct wl_display* glfwGetWaylandDisplay(void)
{
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
return _glfw.wl.display;
}
GLFWAPI struct wl_surface* glfwGetWaylandWindow(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
return window->wl.surface;
}