diff options
author | Morten Johan Sørvig <morten.sorvig@qt.io> | 2019-04-30 09:17:54 +0200 |
---|---|---|
committer | Morten Johan Sørvig <morten.sorvig@qt.io> | 2019-05-13 12:29:21 +0000 |
commit | 56acf089c7759ce21a5bc3ce32616df5b01e78ef (patch) | |
tree | 88af13b8656633009884e11a857563ba01365704 /src/plugins | |
parent | ffdcad9e400ff43b7f33621caca672389a03e4e6 (diff) |
wasm: support setting the font DPI from JS
We have not really been able to determine what the
default DPI should be, so make it configurable with
API on qtloader.js:
qtLoader.setFontDpi(72);
Also lowers the default DPI to the standard value of
96 (down from Qt default 100).
Task-number: QTBUG-75510
Change-Id: Ica1164c8d80bb06519233adebf2c9e400c0991ce
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Diffstat (limited to 'src/plugins')
-rw-r--r-- | src/plugins/platforms/wasm/qtloader.js | 14 | ||||
-rw-r--r-- | src/plugins/platforms/wasm/qwasmintegration.cpp | 17 | ||||
-rw-r--r-- | src/plugins/platforms/wasm/qwasmintegration.h | 2 | ||||
-rw-r--r-- | src/plugins/platforms/wasm/qwasmscreen.cpp | 12 | ||||
-rw-r--r-- | src/plugins/platforms/wasm/qwasmscreen.h | 1 |
5 files changed, 46 insertions, 0 deletions
diff --git a/src/plugins/platforms/wasm/qtloader.js b/src/plugins/platforms/wasm/qtloader.js index 4752a1dcee..ef4a6ec2b9 100644 --- a/src/plugins/platforms/wasm/qtloader.js +++ b/src/plugins/platforms/wasm/qtloader.js @@ -124,6 +124,8 @@ // Remove canvas at run-time. Removes the corresponding QScreen. // resizeCanvasElement // Signals to the application that a canvas has been resized. +// setFontDpi +// Sets the logical font dpi for the application. var Module = {} @@ -237,6 +239,8 @@ function QtLoader(config) publicAPI.addCanvasElement = addCanvasElement; publicAPI.removeCanvasElement = removeCanvasElement; publicAPI.resizeCanvasElement = resizeCanvasElement; + publicAPI.setFontDpi = setFontDpi; + publicAPI.fontDpi = fontDpi; restartCount = 0; @@ -557,6 +561,16 @@ function QtLoader(config) Module.qtResizeCanvasElement(element); } + function setFontDpi(dpi) { + Module.qtFontDpi = dpi; + if (publicAPI.status == "Running") + Module.qtSetFontDpi(dpi); + } + + function fontDpi() { + return Module.qtFontDpi; + } + setStatus("Created"); return publicAPI; diff --git a/src/plugins/platforms/wasm/qwasmintegration.cpp b/src/plugins/platforms/wasm/qwasmintegration.cpp index e601d553f2..150783e193 100644 --- a/src/plugins/platforms/wasm/qwasmintegration.cpp +++ b/src/plugins/platforms/wasm/qwasmintegration.cpp @@ -50,6 +50,7 @@ #include <QtCore/qcoreapplication.h> #include <emscripten/bind.h> +#include <emscripten/val.h> // this is where EGL headers are pulled in, make sure it is last #include "qwasmscreen.h" @@ -80,12 +81,18 @@ static void resizeCanvasElement(emscripten::val canvas) QWasmIntegration::get()->resizeScreen(canvasId); } +static void qtUpdateDpi() +{ + QWasmIntegration::get()->updateDpi(); +} + EMSCRIPTEN_BINDINGS(qtQWasmIntegraton) { function("qtBrowserBeforeUnload", &browserBeforeUnload); function("qtAddCanvasElement", &addCanvasElement); function("qtRemoveCanvasElement", &removeCanvasElement); function("qtResizeCanvasElement", &resizeCanvasElement); + function("qtUpdateDpi", &qtUpdateDpi); } QWasmIntegration *QWasmIntegration::s_instance; @@ -245,4 +252,14 @@ void QWasmIntegration::resizeScreen(const QString &canvasId) m_screens.value(canvasId)->updateQScreenAndCanvasRenderSize(); } +void QWasmIntegration::updateDpi() +{ + emscripten::val dpi = emscripten::val::module_property("qtFontDpi"); + if (dpi.isUndefined()) + return; + qreal dpiValue = dpi.as<qreal>(); + for (QWasmScreen *screen : m_screens) + QWindowSystemInterface::handleScreenLogicalDotsPerInchChange(screen->screen(), dpiValue, dpiValue); +} + QT_END_NAMESPACE diff --git a/src/plugins/platforms/wasm/qwasmintegration.h b/src/plugins/platforms/wasm/qwasmintegration.h index 11d8d0f7f5..6bd2f857db 100644 --- a/src/plugins/platforms/wasm/qwasmintegration.h +++ b/src/plugins/platforms/wasm/qwasmintegration.h @@ -81,6 +81,7 @@ public: void addScreen(const QString &canvasId); void removeScreen(const QString &canvasId); void resizeScreen(const QString &canvasId); + void updateDpi(); private: mutable QWasmFontDatabase *m_fontDb; @@ -89,6 +90,7 @@ private: QHash<QString, QWasmScreen *> m_screens; mutable QWasmClipboard *m_clipboard; + qreal m_fontDpi = -1; static QWasmIntegration *s_instance; }; diff --git a/src/plugins/platforms/wasm/qwasmscreen.cpp b/src/plugins/platforms/wasm/qwasmscreen.cpp index a26cafa900..af50ce7440 100644 --- a/src/plugins/platforms/wasm/qwasmscreen.cpp +++ b/src/plugins/platforms/wasm/qwasmscreen.cpp @@ -31,6 +31,7 @@ #include "qwasmwindow.h" #include "qwasmeventtranslator.h" #include "qwasmcompositor.h" +#include "qwasmintegration.h" #include <emscripten/bind.h> #include <emscripten/val.h> @@ -100,6 +101,17 @@ QImage::Format QWasmScreen::format() const return m_format; } +QDpi QWasmScreen::logicalDpi() const +{ + emscripten::val dpi = emscripten::val::module_property("qtFontDpi"); + if (!dpi.isUndefined()) { + qreal dpiValue = dpi.as<qreal>(); + return QDpi(dpiValue, dpiValue); + } + const qreal defaultDpi = 96; + return QDpi(defaultDpi, defaultDpi); +} + qreal QWasmScreen::devicePixelRatio() const { // FIXME: The effective device pixel ratio may be different from the diff --git a/src/plugins/platforms/wasm/qwasmscreen.h b/src/plugins/platforms/wasm/qwasmscreen.h index 82d2a83edb..8d0d15f245 100644 --- a/src/plugins/platforms/wasm/qwasmscreen.h +++ b/src/plugins/platforms/wasm/qwasmscreen.h @@ -63,6 +63,7 @@ public: QRect geometry() const override; int depth() const override; QImage::Format format() const override; + QDpi logicalDpi() const override; qreal devicePixelRatio() const override; QString name() const override; QPlatformCursor *cursor() const override; |