LookingGlass/client/displayservers/Wayland/gl.c
Quantum 20d459d113 [client] wayland: deal getting scale before size
Certain window managers give us a scale before it gives us a size.
This commit makes the Wayland backend avoid passing a zero size to
wp_viewport_set_source, which is a protocol error.
2022-05-29 14:52:58 +10:00

220 lines
6.2 KiB
C

/**
* Looking Glass
* Copyright © 2017-2022 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "wayland.h"
#include <stdbool.h>
#include <string.h>
#include <EGL/egl.h>
#include <wayland-client.h>
#include "app.h"
#include "common/debug.h"
#include "util.h"
#if defined(ENABLE_EGL) || defined(ENABLE_OPENGL)
#include "egl_dynprocs.h"
#include "eglutil.h"
bool waylandEGLInit(int w, int h)
{
wlWm.eglWindow = wl_egl_window_create(wlWm.surface, w, h);
if (!wlWm.eglWindow)
{
DEBUG_ERROR("Failed to create EGL window");
return false;
}
return true;
}
EGLDisplay waylandGetEGLDisplay(void)
{
EGLNativeDisplayType native = (EGLNativeDisplayType) wlWm.display;
const char *early_exts = eglQueryString(NULL, EGL_EXTENSIONS);
if (util_hasGLExt(early_exts, "EGL_KHR_platform_wayland") &&
g_egl_dynProcs.eglGetPlatformDisplay)
{
DEBUG_INFO("Using eglGetPlatformDisplay");
return g_egl_dynProcs.eglGetPlatformDisplay(EGL_PLATFORM_WAYLAND_KHR, native, NULL);
}
if (util_hasGLExt(early_exts, "EGL_EXT_platform_wayland") &&
g_egl_dynProcs.eglGetPlatformDisplayEXT)
{
DEBUG_INFO("Using eglGetPlatformDisplayEXT");
return g_egl_dynProcs.eglGetPlatformDisplayEXT(EGL_PLATFORM_WAYLAND_EXT, native, NULL);
}
DEBUG_INFO("Using eglGetDisplay");
return eglGetDisplay(native);
}
void waylandEGLSwapBuffers(EGLDisplay display, EGLSurface surface, const struct Rect * damage, int count)
{
if (!wlWm.swapWithDamage.init)
{
if (wl_proxy_get_version((struct wl_proxy *) wlWm.surface) < 4)
{
DEBUG_INFO("Swapping buffers with damage: not supported, need wl_compositor v4");
swapWithDamageDisable(&wlWm.swapWithDamage);
}
else
swapWithDamageInit(&wlWm.swapWithDamage, display);
}
waylandPresentationFrame();
swapWithDamage(&wlWm.swapWithDamage, display, surface, damage, count);
if (wlWm.needsResize)
{
bool skipResize = false;
wl_egl_window_resize(wlWm.eglWindow, wl_fixed_to_int(wlWm.width * wlWm.scale),
wl_fixed_to_int(wlWm.height * wlWm.scale), 0, 0);
if (wlWm.width == 0 || wlWm.height == 0)
skipResize = true;
else if (wlWm.fractionalScale)
{
wl_surface_set_buffer_scale(wlWm.surface, 1);
if (!wlWm.viewport)
wlWm.viewport = wp_viewporter_get_viewport(wlWm.viewporter, wlWm.surface);
wp_viewport_set_source(wlWm.viewport, 0, 0, wlWm.width * wlWm.scale, wlWm.height * wlWm.scale);
wp_viewport_set_destination(wlWm.viewport, wlWm.width, wlWm.height);
}
else
{
if (wlWm.viewport)
{
// Clearing the source and destination rectangles should happen in wp_viewport_destroy.
// However, wlroots does not clear the rectangle until fixed in 456c6e22 (2021-08-02).
// This should be kept to work around old versions of wlroots.
wl_fixed_t clear = wl_fixed_from_int(-1);
wp_viewport_set_source(wlWm.viewport, clear, clear, clear, clear);
wp_viewport_set_destination(wlWm.viewport, -1, -1);
wp_viewport_destroy(wlWm.viewport);
wlWm.viewport = NULL;
}
wl_surface_set_buffer_scale(wlWm.surface, wl_fixed_to_int(wlWm.scale));
}
struct wl_region * region = wl_compositor_create_region(wlWm.compositor);
wl_region_add(region, 0, 0, wlWm.width, wlWm.height);
wl_surface_set_opaque_region(wlWm.surface, region);
wl_region_destroy(region);
app_handleResizeEvent(wlWm.width, wlWm.height, wl_fixed_to_double(wlWm.scale),
(struct Border) {0, 0, 0, 0});
app_invalidateWindow(true);
waylandStopWaitFrame();
wlWm.needsResize = !skipResize;
}
waylandShellAckConfigureIfNeeded();
}
#endif
#ifdef ENABLE_EGL
EGLNativeWindowType waylandGetEGLNativeWindow(void)
{
return (EGLNativeWindowType) wlWm.eglWindow;
}
#endif
#ifdef ENABLE_OPENGL
bool waylandOpenGLInit(void)
{
EGLint attr[] =
{
EGL_BUFFER_SIZE , 24,
EGL_CONFORMANT , EGL_OPENGL_BIT,
EGL_RENDERABLE_TYPE , EGL_OPENGL_BIT,
EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER,
EGL_RED_SIZE , 8,
EGL_GREEN_SIZE , 8,
EGL_BLUE_SIZE , 8,
EGL_SAMPLE_BUFFERS , 0,
EGL_SAMPLES , 0,
EGL_NONE
};
wlWm.glDisplay = waylandGetEGLDisplay();
int maj, min;
if (!eglInitialize(wlWm.glDisplay, &maj, &min))
{
DEBUG_ERROR("Unable to initialize EGL");
return false;
}
if (wlWm.glDisplay == EGL_NO_DISPLAY)
{
DEBUG_ERROR("Failed to get EGL display (eglError: 0x%x)", eglGetError());
return false;
}
EGLint num_config;
if (!eglChooseConfig(wlWm.glDisplay, attr, &wlWm.glConfig, 1, &num_config))
{
DEBUG_ERROR("Failed to choose config (eglError: 0x%x)", eglGetError());
return false;
}
wlWm.glSurface = eglCreateWindowSurface(wlWm.glDisplay, wlWm.glConfig, wlWm.eglWindow, NULL);
if (wlWm.glSurface == EGL_NO_SURFACE)
{
DEBUG_ERROR("Failed to create EGL surface (eglError: 0x%x)", eglGetError());
return false;
}
return true;
}
LG_DSGLContext waylandGLCreateContext(void)
{
eglBindAPI(EGL_OPENGL_API);
return eglCreateContext(wlWm.glDisplay, wlWm.glConfig, EGL_NO_CONTEXT, NULL);
}
void waylandGLDeleteContext(LG_DSGLContext context)
{
eglDestroyContext(wlWm.glDisplay, context);
}
void waylandGLMakeCurrent(LG_DSGLContext context)
{
eglMakeCurrent(wlWm.glDisplay, wlWm.glSurface, wlWm.glSurface, context);
}
void waylandGLSetSwapInterval(int interval)
{
eglSwapInterval(wlWm.glDisplay, interval);
}
void waylandGLSwapBuffers(void)
{
waylandEGLSwapBuffers(wlWm.glDisplay, wlWm.glSurface, NULL, 0);
}
#endif