diff options
Diffstat (limited to 'doc/src/platforms')
| -rw-r--r-- | doc/src/platforms/platform-notes.qdoc | 50 | ||||
| -rw-r--r-- | doc/src/platforms/supported-platforms.qdoc | 42 |
2 files changed, 70 insertions, 22 deletions
diff --git a/doc/src/platforms/platform-notes.qdoc b/doc/src/platforms/platform-notes.qdoc index 94b9856..6f533ae 100644 --- a/doc/src/platforms/platform-notes.qdoc +++ b/doc/src/platforms/platform-notes.qdoc @@ -526,6 +526,56 @@ platform in use. If available, it is loaded in preference over the MMF plugin. If the Helix plugin fails to load, the MMF plugin, if present on the device, will be loaded instead. + + \section1 UI Performance in devices prior to Symbian^3 + + Qt uses the QPainter class to perform low-level painting on widgets and + other paint devices. QPainter provides functions to draw complex shapes, + aligned text and pixmaps. It can also do vector path clipping, coordinate + transformations and Porter-Duff composition. If the underlying graphics + architecture does not support all of these operations then Qt uses the + raster graphics system for rendering. + + Most of the Symbian devices prior to Symbian^3 use a non-ScreenPlay + graphics architecture which does not have native support for all functions + provided by QPainter. In non-ScreenPlay devices Qt uses the raster + graphics system by default which has a performance penalty when compared + to native Symbian rendering. + + In order to be able to perform all functions provided by QPainter, the + raster graphics system needs to have pixel level framebuffer access. To + make this possible in non-ScreenPlay devices Qt has to create an + additional offscreen buffer that is the target for all Qt rendering + operations. Qt renders the widget tree to the offscreen buffer and the + offscreen buffer is blitted to the framebuffer via Symbian Window Server. + + The following table shows the rendering stacks of native Symbian and Qt in + non-ScreenPlay devices. + + \table + \header \o Symbian + \o Qt + \row \o \image symbian-rendering-stack-non-screenplay.png + \o \image symbian-qt-rendering-stack-non-screenplay.png + \endtable + + The following diagrams show a simplified sequence of drawing a pixmap in + a non-ScreenPlay device. + + \table + \header \o Symbian + \row \o \image symbian-draw-pixmap-sequence.png + \endtable + + \table + \header \o Qt + \row \o \image symbian-qt-draw-pixmap-sequence.png + \endtable + + When compared to a native Symbian application, Qt does an additional blit + to the offscreen buffer before drawing to the framebuffer. That is the + performance penalty which needs to be paid to get all functionality + provided by QPainter in non-ScreenPlay architecture. */ /*! diff --git a/doc/src/platforms/supported-platforms.qdoc b/doc/src/platforms/supported-platforms.qdoc index bb80ae5..6e9fb3d 100644 --- a/doc/src/platforms/supported-platforms.qdoc +++ b/doc/src/platforms/supported-platforms.qdoc @@ -64,18 +64,22 @@ \row \o Linux (32 and 64-bit) \o gcc 4.2 \row \o Microsoft Windows XP - \o gcc 4.4 (MinGW) (32-bit), MSVC 2003, 2005 (32 and 64-bit) + \o gcc 4.4 (MinGW) (32-bit), MSVC 2005 (32 and 64-bit) \row \o Microsoft Windows Vista \o MSVC 2005, 2008 \row \o Microsoft Windows Vista 64bit \o MSVC 2008 - \row \o Apple Mac OS X 10.5 "Leopard" x86_64 (Carbon, Cocoa 32 and 64bit) + \row \o Microsoft Windows 7 + \o MSVC 2008 + \row \o Apple Mac OS X 10.6 "Snow Leopard" + \o As provided by Apple + \row \o Apple Mac OS X 10.5 "Leopard" x86_64 (Cocoa 32 and 64bit) \o As provided by Apple \row \o Embedded Linux QWS (ARM) \o gcc (\l{http://www.codesourcery.com/}{Codesourcery version)} \row \o Windows CE 5.0 (ARMv4i, x86, MIPS) \o MSVC 2005 WinCE 5.0 Standard (x86, pocket, smart, mipsii) - \row \o Symbian (Symbian/S60 3.1, 3.2 and 5.0) + \row \o Symbian (Symbian/S60 5.0) \o RVCT 2.2 [build 686 or later], WINSCW 3.2.5 [build 482 or later], GCCE (for applications) \endtable @@ -90,19 +94,15 @@ \table \header \o Platform \o Compilers - \row \o Windows XP, Vista - \o gcc 3.4.2 (MinGW) \row \o Windows 7 - \o MSVC 2008 - \row \o Apple Mac OS X 10.6 "Snow Leopard" + \o MSVC 2010 + \row \o Apple Mac OS X 10.4 "Tiger" (Carbon) \o As provided by Apple - \row \o Apple Mac OS X 10.4 "Tiger" + \row \o Apple Mac OS X 10.5 "Leopard" (Carbon) \o As provided by Apple - \row \o HPUXi 11.11 - \o aCC 3.57, gcc 3.4 \row \o HPUXi 11.23 \o aCC 6.10 - \row \o Solaris 10 (UltraSparc, x86) + \row \o Solaris 10 UltraSparc \o Sun Studio 12 \row \o AIX 6 \o Power5 xlC 7 @@ -114,8 +114,14 @@ \o gcc (\l{http://www.codesourcery.com/}{Codesourcery version)} \row \o Embedded Linux X11 (ARM) \o gcc (\l{http://www.scratchbox.org/}{Scratchbox)} + \row \o Windows CE 5.0 (ARMv4i, x86, MIPS) + \o MSVC 2005 WinCE 5.0 Standard (x86, pocket, smart, mipsii) \row \o Windows CE 6.0 (ARMv4i, x86, MIPS) \o MSVC 2008 WinCE 6.0 Professional + \row \o Maemo 5(Linux, ARM, X11) + \o gcc (\l{http://www.scratchbox.org/}{Scratchbox)} + \row \o Symbian (Symbian/S60 3.1, 3.2) + \o RVCT 2.2 [build 686 or later], WINSCW 3.2.5 [build 482 or later], GCCE (for applications) \endtable \section1 Tier 3 Platforms (Not supported by Nokia) @@ -142,20 +148,12 @@ implied warranties of merchantability, fitness for a particular purpose, title and non-infringement with regard to the Licensed Software. - \section1 Planned Changes for Qt 4.7 + \section1 Planned Changes for Qt 4.8 The following changes to the list of supported platforms are at time of publishing - planned for Qt 4.7: + planned for Qt 4.8: \list - \o Upgrade Windows 7 to Tier 1 - \o Upgrade Mac OS X 10.6 to Tier 1 - \o Add support for Visual Studio 2010 (Tier 2) - \o Move support for Carbon implementation of Qt on Mac OS X from Tier 1 to Tier 2 - \o Drop support for MinGW 3.4 - \o Drop support for Visual Studio 2003 - \o Drop support for HP-UX on PA-RISC - \o Drop support for Windows Mobile 5 - \o Drop support for OpenGL ES Common Lite 1.0 + \o Plans not yet released \endlist */ |