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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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* HOLDER 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 "WPEScreenDRM.h"
#include "WPEScreenDRMPrivate.h"
#include <wtf/glib/WTFGType.h>
/**
* WPEScreenDRM:
*
*/
struct _WPEScreenDRMPrivate {
std::unique_ptr<WPE::DRM::Crtc> crtc;
drmModeModeInfo mode;
};
WEBKIT_DEFINE_FINAL_TYPE(WPEScreenDRM, wpe_screen_drm, WPE_TYPE_SCREEN, WPEScreen)
static void wpeScreenDRMInvalidate(WPEScreen* screen)
{
auto* priv = WPE_SCREEN_DRM(screen)->priv;
priv->crtc = nullptr;
}
static void wpeScreenDRMDispose(GObject* object)
{
wpeScreenDRMInvalidate(WPE_SCREEN(object));
G_OBJECT_CLASS(wpe_screen_drm_parent_class)->dispose(object);
}
static void wpe_screen_drm_class_init(WPEScreenDRMClass* screenDRMClass)
{
GObjectClass* objectClass = G_OBJECT_CLASS(screenDRMClass);
objectClass->dispose = wpeScreenDRMDispose;
WPEScreenClass* screenClass = WPE_SCREEN_CLASS(screenDRMClass);
screenClass->invalidate = wpeScreenDRMInvalidate;
}
WPEScreen* wpeScreenDRMCreate(std::unique_ptr<WPE::DRM::Crtc>&& crtc, const WPE::DRM::Connector& connector)
{
auto* screen = WPE_SCREEN(g_object_new(WPE_TYPE_SCREEN_DRM, "id", crtc->id(), nullptr));
auto* priv = WPE_SCREEN_DRM(screen)->priv;
priv->crtc = WTFMove(crtc);
wpe_screen_set_physical_size(screen, connector.widthMM(), connector.heightMM());
if (const auto& mode = priv->crtc->currentMode())
priv->mode = mode.value();
else {
if (const auto& preferredModeIndex = connector.preferredModeIndex())
priv->mode = connector.modes()[preferredModeIndex.value()];
else {
int area = 0;
for (const auto& mode : connector.modes()) {
int modeArea = mode.hdisplay * mode.vdisplay;
if (modeArea > area) {
priv->mode = mode;
area = modeArea;
}
}
}
}
uint32_t refresh = [](drmModeModeInfo* info) -> uint32_t {
uint64_t refresh = (info->clock * 1000000LL / info->htotal + info->vtotal / 2) / info->vtotal;
if (info->flags & DRM_MODE_FLAG_INTERLACE)
refresh *= 2;
if (info->flags & DRM_MODE_FLAG_DBLSCAN)
refresh /= 2;
if (info->vscan > 1)
refresh /= info->vscan;
return refresh;
}(&priv->mode);
wpe_screen_set_refresh_rate(screen, refresh);
return WPE_SCREEN(screen);
}
drmModeModeInfo* wpeScreenDRMGetMode(WPEScreenDRM* screen)
{
return &screen->priv->mode;
}
const WPE::DRM::Crtc wpeScreenDRMGetCrtc(WPEScreenDRM* screen)
{
return *screen->priv->crtc;
}
double wpeScreenDRMGuessScale(WPEScreenDRM* screen)
{
// - If the screen does not have physical size values, use 1x.
// - If the screen is at least 1200px tall and has 192dpi, use 2x.
// - Otherwise, use 1x.
//
// This is a simplistic approach to choose the scale factor depending
// on its characteristics, but works reasonably well for many devices.
// In particular, this logic keeps 1x (no scaling) all the way up to
// and including FullHD/1080p screens, regardless of their pixel density,
// as it is very rare that "high DPI" screens have appropriate sizes to
// apply a higher scaling factor.
//
// Note that, for the sake of simplicity, this never uses fractional
// scaling, and checks the resolution of the current mode instead of
// the preferred/maximum resolution (which woule have been better).
static constexpr uint32_t minimum2xScaleDPI = 2 * 96;
static constexpr uint32_t minimum2xPixelHeight = 1200;
static constexpr float mmPerInch = 25.4;
const auto pixelWidth = screen->priv->mode.hdisplay;
const auto pixelHeight = screen->priv->mode.vdisplay;
if (pixelHeight < minimum2xPixelHeight)
return 1.0;
const auto physicalWidth = wpe_screen_get_physical_width(WPE_SCREEN(screen));
const auto physicalHeight = wpe_screen_get_physical_height(WPE_SCREEN(screen));
if (physicalWidth <= 0 || physicalHeight <= 0)
return 1.0;
const auto horizontalDPI = static_cast<float>(pixelWidth) / (physicalWidth / mmPerInch);
const auto verticalDPI = static_cast<float>(pixelHeight) / (physicalHeight / mmPerInch);
if (horizontalDPI <= minimum2xScaleDPI || verticalDPI <= minimum2xScaleDPI)
return 1.0;
return 2.0;
}
/**
* wpe_screen_drm_get_crtc_index: (skip)
* @screen: a #WPEScreenDRM
*
* Get the DRM CRTC index of @screen
*
* Returns: the CRTC index
*/
guint wpe_screen_drm_get_crtc_index(WPEScreenDRM* screen)
{
g_return_val_if_fail(WPE_IS_SCREEN_DRM(screen), 0);
return screen->priv->crtc->index();
}
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