Fancy_and_Fast_GUIs_on_Embedded_Devices.pdf

《Fancy_and_Fast_GUIs_on_Embedded_Devices.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、FancyandFastFancyandFastGUIsGUIsonEmbeddedDevicesonEmbeddedDevicesUsingtheEnlightenmentFoundationLibrariestoachievemaximumperformanceonembeddeddevices.GustavoSverzutBarbieriINdT/RecifeCELFEmbeddedLinuxConference-November3rd,2007Nowcostumersareusedt

2、ofancydevicesandexpectnewertobeevenfancier...UsersExpectationsUsersExpectations●Quickfeedback:responsive;●Naturalanimations:–Matchesreallife;–Clarifiestheworkflow;–Cluewheneverdeviceisworkingorfrozen;–Quickdistractionwhilesystemisprocessing;●Beauty.TechnologiesTechnologiesX11Wind

3、owSystemX11WindowSystem●Input/OutputcommunicationwithHardware;●NetworkedprotocoltocommunicatewithApps;●UsedineveryUNIXsystemsince1987;●Verybasicprimitives;●Verydifficulttogetright;●Oftenusedthroughhigh-levelabstractionlibs:–GTK,Qt,SDL,Evas,Tk,Xaw,Motif,...OpenGL-OpenGraphicsLibra

4、ryOpenGL-OpenGraphicsLibrary●IndustrystandardforHardwareandSoftware;●Focuson3D(2Dishandledasconsequence);●Fasttriangle/rectangle/polygondrawing;●Fastmatrixtransformations(scale,rotate,shear,perspective);●Fastalphablend;●High-endcardssupportprograms-per-pixel(pixelshaders):advance

5、drender,lightandeffects;GTK-TheGIMPToolkitGTK-TheGIMPToolkit●CreatedinordertohelpdevelopmentofTheGIMP(Photoshop-liketool)withX11;●Focusonvisualwidgets(buttons,textbox,...);●Someeffortstorunonnon-X11platforms;●Basicfree-drawingoperations;●AdoptedbyGNOMEprojectdueitsLGPLlicense;●No

6、OpenGLsupport;SDL-SimpleDirectLayerSDL-SimpleDirectLayer●CreatedtoaidportofWindowsgamestoLinux;●Multi-platformbydesign;●Framebufferandeventsabstractionlayer;●Almostnodrawingprimitives;●Easytodrawimageseverywhere(nothingmore);●Lowentrybarrier;●Developermustcareabouteverything;●Ope

7、nGL"support";EvasEvas●CreatedtoaiddevelopmentofgraphicalappealingWindowManagerandFileManager;●Focusonanimationandalphablending;●Effortstorunonnon-X11platforms;●Easytodrawobjectseverywhere;●Powerfulandextensibledrawingsystem;●State-fullcanvas;●GUIstackbuiltuponEvasandEdje(ETK,EWL)

8、;●OpenGLsupport;SceneRenderer/Manager-Co