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Transcript of Anantha Kancherla Group Program Manager Microsoft Corporation PC04.
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Writing Your Application to Shine on Modern Graphics Hardware DirectX for mainstream applications
Anantha KancherlaGroup Program ManagerMicrosoft Corporation
PC04
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Agenda
Where is Graphics Hardware headed How does Win7 adapt to HW changes
The expanding role of DirectX in Windows 7
Addressing new graphics scenarios and fundamentals in Windows 7 timeframe
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Increasing generalism. Array of SIMD ALUs Arithmetic, flow control, read,
write Some fixed function units such as
tessellation
Courtesy: Tom’s Hardware
Order of magnitude difference between low and high end
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Windows 7's Usage of the GPU
Continues from Windows Vista… Media Center UI Video Playback Desktop Window Manager (DWM)
Windows 7 DWM uses Direct3D10.1 API Scales in performance all the way from low end
integrated to high end GPUs Shaders are used for blurs in the Glass Windows 7 cuts memory consumption is cut by
50% per window More and richer animations of the thumbnails
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High DPI High Color
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Description Horizontal Vertical Width (in) Panel DPI 15.4" WXGA 1280 768 15.4 9717" WXGA+ 1440 900 17 10014.1" WXGA 1280 768 14.1 10615.4" WXGA+ 1440 900 15.4 11013.3" WXGA 1280 768 13.3 11217" WSXGA+ 1680 1050 17 11714.1" WXGA+ 1440 900 14.1 12012.1" WXGA 1280 768 12.1 12313.3" WXGA+ 1440 900 13.3 12715.4" WSXGA+ 1680 1050 15.4 12917" WUXGA 1920 1200 17 13315.4" WUXGA 1920 1200 15.4 147
High DPI Displays are Common
Improvements in Windows UI & IE
Automatic configuration in OOBE
Promotion the Control Panel UI for DPI
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High Color
Wider Gamut Bigger than sRGB eg. xvYCC, AdobeRGB
Higher precision Higher Dynamic Range
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High Color
Wider Gamut Bigger than sRGB eg. xvYCC, AdobeRGB
Higher precision Higher Dynamic Range
Windows 7 Provides:Color Calibration ToolGamma LUT Loader
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Systems configurations impact Graphics
Laptop sales are now >50% of PC sales
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Overview of Changes in Windows 7To adapt to HW changes
Addresses ranges of GPU performance characteristics Cuts memory consumption by 50% per window
High DPI Number of changes in User Interface and IE
Color: Color Calibration Wizard and LUT Loader
Laptop scenarios Monitor hot plug detect
Now let us look at how you can take advantage of this powerful hardware…
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Agenda
Where is Graphics Hardware headed How does Win7 adapt to HW changes
The expanding role of DirectX in Windows 7
Addressing new graphics scenarios and fundamentals in Windows 7 timeframe
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Graphics APIs for Rich Client Applications
GDI GDI+ DirectX WPF
Native Development
Managed Development
Hardware Acceleration
ImmediateMode
PrimarilyRendering
Input, Focus, Events, Controls
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DirectX: When the application needs control over features and performance
WPF: When the application needs richness but needs to be built quickly and there is no need for fine grained control over hw performance and features
GDI: When the application needs to work on all Microsoft OSs and the lowest common denominator functionality is sufficient
When to use which API
Incr
easi
ng H
W E
xplo
itive
ness
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Originally designed for Games and to abstract HW
DX9 introduced Floating point shaders HLSL to program shaders Windows Vista adopted it for many features:
UI: Aero and MCE Image Processing: Windows Photo Gallery
DX10 was designed for more than games Clean API to minimize API overhead Consistent implementation across HW – No Caps Refactored Infrastructure API: DXGI
DirectX Evolution
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DirectX == High Performance Graphics
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Broad Usage of Direct3D Today
Typical user is someone who needs great performance and very custom/rich rendering
Mapping applications: Eg. VirtualEarth and Google Earth
UI and Application Frameworks: WPF, XNA
User Interfaces: MCE, Zune, DWM
Workstation Applications: Eg. Dassault Systèmes-3DLive, AutoDesk
Applications, Bentley Microstation, SoftImage XSI
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Dassault Systèmes – 3DLive
3D Product LifeCycle Management with DirectX10
demo
Jean BuffetR&D Product ManagerDassault Systèmes
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3DLive : feature at glance
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Dassault Systèmes 3DLive
3DLive DirectX10 in Action on Windows 7
Demo
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DS - 3D Visualization Objectives Providing “Life-like experience” of the virtual
product in 3D Ambiance, animation Realistic rendering (shaders like Car Paint, Sky shader) AAA game level rendering for CAD : Ambient Occlusion,
Full Scene AA, IBL, soft shadows, true transparency Best graphics performances to reach high interactivity (60
fps)
While matching CAD constraints Ability to manage large number of triangles (10 M tri to 100 M tri) : Level of Details, viewpoint-dependent tessellationAbility to manage hundreds of textures & shaders Reach an interactive frame rate (20 fps)Support of CAD-specific visualization mode : wireframe, outlines, hidden edges, hidden line removal
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Developer journey from OpenGL to DirectX10 D3D10 is the right level of API for Dassault Systèmes 3D - PLM Applications
D3D9 were gaming oriented API New features proposed by D3D10 allowed developers to implement advanced 3D &
CAD-specific features “Geometry Shader” is the D3D10 answer for specific 3D entities
Line type, line thickness, 3D marker…
ChallengesTechnical Challenge
Full Shader pipe-line at application levelHaving a native Vertex Buffer/Index Buffer managementEmulate the OpenGL immediate mode in an efficient way
Review your design patternMore work at apps level but gives more room for optimizationGood opportunity to rework applicative architecture
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Area Existing API(s) Challenges
3D DX3…DX10 Not always available:•No HW•Server•Remoted
2D GDI, GDI+ Quality, Performance
Text GDI Quality, Not up to date
Imaging GDI, GDI+, WIC Extensive format support, Security
Device Control GDI Outdated notion of HW config
Current Platform Challenges
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Area Existing API(s) Challenges
3D D3D3…D3D10 Not always available:•No HW•Server•Remoted
Direct3D 10.1
2D GDI, GDI+ Quality, Performance
Text GDI Quality, Not up to date
Imaging GDI, GDI+, WIC Extensive format support, Security
Updated WIC
Device Control GDI Outdated notion of HW config
DXGI 1.1
Advancing the platform
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Area Existing API(s) Challenges
3D D3D3…D3D10 Not always available:•No HW•Server•Remoted
Direct3D 10.1
2D GDI, GDI+ Quality, Performance Direct2D
Text GDI Quality, Not up to date DirectWrite
Imaging GDI, GDI+, WIC Extensive format support, Security
Updated WIC
Device Control GDI Outdated notion of HW config
DXGI 1.1
Advancing the platform
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Advancing the platform
Introducing…
Direct2DDirectWrite
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DXGKernel
DXGI
Win32K
GDI+
USER
Direct3D 11Direct3D 10
DWMDirect2D
DirectWrite
GDI
WIC
DXVA
Microsoft Confidential
Hardware
Direct3D9
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Properties of DirectX APIs
Primary focus: Large scale Win32 application developers with existing
codebases Designed around needs of Windows UI, Internet
Explorer, Microsoft Office Side-by-side components
Can mix-n-match Interface based APIs w/ C/C++ Hardware accelerated Immediate mode rendering Interops with older Win32 APIs Available on Windows Vista
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Direct3D 10.1 is the Foundation
Always available: D3D10L9 for DX9 HW Full SW emulation when there is no HW Fully remoted via primitives and bitmaps
Supports GDI compatible color channel ordering
Direct3D 10 HW is a Premium Logo requirement in Vista
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Direct3D 11: Increasing GPU Utility
Strict superset of Direct3D10 Runs on Direct3D 9, 10 and 11 HW New Graphics features
Improved multi-threading support (Need new HW) Tessellation (Need new HW) Subroutine support in shaders
Compute Shader Enables non-Graphics usages (GPGPU) Integrated with graphics for imaging usage Program with familiar HLSL and D3D resource model
PC03: Unlocking the GPU with Direct3D ES21: Windows 7 Presentation Virtualization: Graphics Remoting
( RDP) Today and Tomorrow
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Direct2D: New in Windows 7
Rendering Focused Immediate Mode API: 2D Vectors & Geometry, Bitmaps and Text Hardware and Software Pipelines
Built for Performance on Direct3D 10.1 Interoperable with Direct3D and GDI High Quality Rendering:
Per Primitive Anti-Aliasing and MSAA via Direct3D
Remoted via Direct3D 10.1 Printing support via XPS
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DirectWrite: New in Windows 7
Modern Typography Enables world-wide applications ClearType advances Works with any rendering technology Hardware accelerated via Direct2D
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API Interop
All DirectX APIs interop with each other. Eg. D2D/D3D, DWrite/D2D etc.
DirectX APIs interop with GDI Interop between DX and GDI is high
performance in Win7 Directly blitting to front buffer via GDI can
cause unpredictable results GetDC() is the preferred way
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DX/GDI Interop
//DX CodeCreateRenderTarget()Draw()Present()
// GDI CodeGetDC()DrawLine()ReleaseDC()
Windows Vista
Windows 7
Copy 1
Copy 2
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More Details…
Direct2D, DirectWrite and Interop between APIs are covered in:
PC18: Introducing Direct2D and DirectWrite Hands on Lab: DirectX
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Performance with DirectX
Very important to scale graphics content by HW Since GPUs vary widely in performance Identify min-bar and tiers of performance
Important to always respond Main loop should handle only input and rendering No disk or network I/O and computation in this loop
Have a benchmark mode in your application
PIX is a powerful performance debugging tool in DX SDK
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PIX
demo
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GDI+ in Win7
GDI+ is largely unchanged. Except: v1.1 is default
CMYK support Effects (Blur, Sharpen, Tint etc.) GDI+ 1.1 uses WIC for image loading
v1.0 is deprecated can be forced via manifest
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DirectX Going Ahead
DirectX is for all applications that need high performance graphics, not just games Windows 7 Desktop itself is now built on
Direct3D 10.1 Direct3D 10.1 is the Foundation API Two new DirectX APIs in Win7
Direct2D and DirectWrite PIX in DX SDK helps with tuning
performance Longer term DirectX APIs will replace GDI
functionality
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Agenda
Where is Graphics Hardware headed How does Win7 adapt to HW changes
The expanding role of DirectX in Windows 7
Addressing new graphics scenarios and fundamentals in Windows 7 timeframe
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High Color
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Areas of Application
Primarily Imaging Applications Medical Visualization Presentation Photography CAD
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Windows7 High Color Support
3 new formats added in WIC, WCS and DXGI Works in full-screen and overlay mode
10 bpc sRGB 10 bpc XR 16bpc HDR
Precision Higher (Medical, Technical)
Same as 8-bit High
Gamut sRGB (below current camera sensors)
Matches current cameras, TVs (eg. xvYCC)Covers human vision
High
Dynamic Range Low Low High
Power/Perf requirements
Same as 8-bit Same as 8-bit High
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Dynamic HW Changes
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Common Scenarios
Laptop docking/un-docking USB Displays plug/un-plug Other full-screen exclusive mode
applications launching Hybrid laptops where GPUs switch
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Dynamic System Changes GDI Applications
Heed WM_DISPLAYCHANGE message Tells you when the resolution has changed Always stick with the desktop resolution
Unless for perf Adapt your layout if needed
Heed WM_DEVICECHANGE message Tells you when laptop docks/undocks
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Dynamic System Changes DX Applications
Monitor via return value from IDXGISwapChain::Present() API and respond based on the return code: DXGI_STATUS_OCCLUDED - Wait DXGI_STATUS_MODE_CHANGED – “Reset” adapt to the new mode DXGI_ERROR_DEVICE_REMOVED – Stop rendering and wait for
WM_DEVICECHANGE message to re-enumerate HW and re-create device.
IDXGISwapChain::GetDeviceRemovedReason() returns: DXGI_ERROR_DEVICE_HUNG or DXGI_ERROR_DEVICE_RESET for
HW hangs DXGI_ERROR_REMOTE_DISCONNECT tells the app if the network
dropped off
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Graphics Fundamental: High DPI
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This was very surprising to us…
Monitor Max Resolution
% Set to Maximum
1280X1024 56%1400X1050 79%1600X1200 32%1680X1050 66%1920X1050 39%1920X1200 78%Avg. set to default 55%
User's Chosen Resolution
% using that resolution
640X480 1%800X600 7%1024X768 57%1280X1024 3%1600X1200 32%Total 100.00%
Details Users with Max Resolution of 1600X1200
Almost half of all of users are not
configuring their display to native
resolution (!)
Users are lowering their screen resolution to get larger text…
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High DPI Issues
Clipped Text
Layout Issues & Image Size Issues
Pixilated BitmapsLayout Issues
Blurry UI
Mismatched Font Sizes
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DPI Virtualization
Feature introduced in Vista, Applies to apps which do not declare DPI awareness
Via manifest or via SetProcessDPIAware() Win32 subsystem returns system metrics calls as if the app were
running at 96 DPI (values returned from GetSystemMetrics(), GetDeviceCaps, DEFAULT_GUI_FONT, etc.)
DWM scales the application window when it composes the desktop
DPI Virtualization is a stop-gap, not a solution
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High DPI Hands on Lab
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High DPI Solutions
White-paper for fixing desktop applications http://go.microsoft.com/fwlink/?LinkID=12958
8
White-paper on how to use IE8 zoom functionality to fix web apps http://msdn.microsoft.com/en-us/library/cc84
9094.aspx
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Summary
Graphics HW these days are extremely powerful
Used properly, tremendous end-user benefits can be realized
However it is important to be aware of the diversity of the PCs out there
Adapt your application to take advantage of this power yet insulate it from the diversity via DirectX APIs
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Call to Action
Learn to use DirectX APIs to create rich client applications
Take advantage of new functionality afforded by Win7 such as High Color
Make your application robust against dynamic system changes
Address High DPI issues in your applications
Attend the other DirectX sessions: PC18: Introducing Direct2D and DirectWrite PC03: Unlocking the GPU with Direct3D
Hands on Lab has a number of DirectX tutorials
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Dgtsig @ Microsoft.com
http://msdn.microsoft.com/DirectX
Follow Up
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Evals & Recordings
Please fill
out your
evaluation for
this session at:
This session will be available as a recording at:
www.microsoftpdc.com
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Please use the microphones provided
Q&A
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© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market
conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
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