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/*
* Copyright (C) 2024 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DRMDevice.h"
#include <WebCore/GLContext.h>
#include <WebCore/PlatformDisplay.h>
#include <epoxy/egl.h>
#include <mutex>
#include <wtf/Function.h>
#include <wtf/NeverDestroyed.h>
#if PLATFORM(GTK)
#include "Display.h"
#endif
#if PLATFORM(WPE) && ENABLE(WPE_PLATFORM)
#include <wpe/wpe-platform.h>
#endif
#if USE(LIBDRM)
#include <xf86drm.h>
#endif
#ifndef EGL_DRM_RENDER_NODE_FILE_EXT
#define EGL_DRM_RENDER_NODE_FILE_EXT 0x3377
#endif
namespace WebKit {
static EGLDeviceEXT eglDisplayDevice(EGLDisplay eglDisplay)
{
if (!WebCore::GLContext::isExtensionSupported(eglQueryString(nullptr, EGL_EXTENSIONS), "EGL_EXT_device_query"))
return nullptr;
EGLDeviceEXT eglDevice;
if (eglQueryDisplayAttribEXT(eglDisplay, EGL_DEVICE_EXT, reinterpret_cast<EGLAttrib*>(&eglDevice)))
return eglDevice;
return nullptr;
}
#if USE(LIBDRM)
static void drmForeachDevice(Function<bool(drmDevice*)>&& functor)
{
std::array<drmDevicePtr, 64> devices = { };
int numDevices = drmGetDevices2(0, devices.data(), devices.size());
if (numDevices <= 0)
return;
for (int i = 0; i < numDevices; ++i) {
if (!functor(devices[i]))
break;
}
drmFreeDevices(devices.data(), numDevices);
}
static String drmFirstRenderNode()
{
String renderNodeDeviceFile;
drmForeachDevice([&](drmDevice* device) {
if (!(device->available_nodes & (1 << DRM_NODE_RENDER)))
return true;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN // GTK/WPE Port
renderNodeDeviceFile = String::fromUTF8(device->nodes[DRM_NODE_RENDER]);
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
return false;
});
return renderNodeDeviceFile;
}
static String drmRenderNodeFromPrimaryDeviceFile(const String& primaryDeviceFile)
{
if (primaryDeviceFile.isEmpty())
return drmFirstRenderNode();
String renderNodeDeviceFile;
drmForeachDevice([&](drmDevice* device) {
if (!(device->available_nodes & (1 << DRM_NODE_PRIMARY | 1 << DRM_NODE_RENDER)))
return true;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN // GTK/WPE Port
if (String::fromUTF8(device->nodes[DRM_NODE_PRIMARY]) == primaryDeviceFile) {
renderNodeDeviceFile = String::fromUTF8(device->nodes[DRM_NODE_RENDER]);
return false;
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
return true;
});
// If we fail to find a render node for the device file, just use the device file as render node.
return !renderNodeDeviceFile.isEmpty() ? renderNodeDeviceFile : primaryDeviceFile;
}
#endif
static String drmRenderNodeForEGLDisplay(EGLDisplay eglDisplay)
{
if (EGLDeviceEXT device = eglDisplayDevice(eglDisplay)) {
if (WebCore::GLContext::isExtensionSupported(eglQueryDeviceStringEXT(device, EGL_EXTENSIONS), "EGL_EXT_device_drm_render_node"))
return String::fromUTF8(eglQueryDeviceStringEXT(device, EGL_DRM_RENDER_NODE_FILE_EXT));
#if USE(LIBDRM)
// If EGL_EXT_device_drm_render_node is not present, try to get the render node using DRM API.
return drmRenderNodeFromPrimaryDeviceFile(drmPrimaryDevice());
#endif
}
#if USE(LIBDRM)
// If EGLDevice is not available, just get the first render node returned by DRM.
return drmFirstRenderNode();
#else
return { };
#endif
}
static String drmPrimaryDeviceForEGLDisplay(EGLDisplay eglDisplay)
{
EGLDeviceEXT device = eglDisplayDevice(eglDisplay);
if (!device)
return { };
if (!WebCore::GLContext::isExtensionSupported(eglQueryDeviceStringEXT(device, EGL_EXTENSIONS), "EGL_EXT_device_drm"))
return { };
return String::fromUTF8(eglQueryDeviceStringEXT(device, EGL_DRM_DEVICE_FILE_EXT));
}
static EGLDisplay currentEGLDisplay()
{
#if PLATFORM(GTK)
if (auto* glDisplay = Display::singleton().glDisplay())
return glDisplay->eglDisplay();
#endif
auto eglDisplay = eglGetCurrentDisplay();
if (eglDisplay != EGL_NO_DISPLAY)
return eglDisplay;
return eglGetDisplay(EGL_DEFAULT_DISPLAY);
}
const String& drmPrimaryDevice()
{
static LazyNeverDestroyed<String> primaryDevice;
static std::once_flag once;
std::call_once(once, [] {
#if PLATFORM(WPE) && ENABLE(WPE_PLATFORM)
if (g_type_class_peek(WPE_TYPE_DISPLAY)) {
primaryDevice.construct(String::fromUTF8(wpe_display_get_drm_device(wpe_display_get_primary())));
return;
}
#endif
auto eglDisplay = currentEGLDisplay();
if (eglDisplay != EGL_NO_DISPLAY) {
primaryDevice.construct(drmPrimaryDeviceForEGLDisplay(eglDisplay));
return;
}
primaryDevice.construct();
});
return primaryDevice.get();
}
const String& drmRenderNodeDevice()
{
static LazyNeverDestroyed<String> renderNodeDevice;
static std::once_flag once;
std::call_once(once, [] {
#if PLATFORM(WPE) && ENABLE(WPE_PLATFORM)
if (g_type_class_peek(WPE_TYPE_DISPLAY)) {
renderNodeDevice.construct(String::fromUTF8(wpe_display_get_drm_render_node(wpe_display_get_primary())));
return;
}
#endif
const char* envDeviceFile = getenv("WEBKIT_WEB_RENDER_DEVICE_FILE");
if (envDeviceFile && *envDeviceFile) {
renderNodeDevice.construct(String::fromUTF8(envDeviceFile));
return;
}
auto eglDisplay = currentEGLDisplay();
if (eglDisplay != EGL_NO_DISPLAY) {
renderNodeDevice.construct(drmRenderNodeForEGLDisplay(eglDisplay));
return;
}
renderNodeDevice.construct();
});
return renderNodeDevice.get();
}
} // namespace WebKit
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