How To Fix Directx Setup Could Not Download The File Windows 7

0 views

Skip to first unread message

Message has been deleted

Hercules Montero

unread,

Jul 14, 2024, 6:53:11 AM7/14/24

to tocktabudun

In this topic, you'll get an overview of the key technical concepts behind Windows Advanced Color support. You'll learn requirements and instructions for rendering HDR, WCG, and high bit-depth DirectX content to one of these displays. If you have a color-managed app (for example, using ICC profiles), then you'll learn how auto color management enables better color accuracy for your scenarios.

how to fix directx setup could not download the file windows 7

Descargar Zip https://urluss.com/2yPvUJ

Advanced Color is an umbrella term of operating system (OS) technologies for displays with significantly higher color fidelity than standard displays. The predominant extended capabilities are described in the sections below. Advanced Color capabilities were first introduced for HDR displays with Windows 10, version 1709 (Fall Creators Update), and for specially provisioned SDR displays with the Windows 11, version 22H2 (10.0; Build 22621) release.

Dynamic range refers to the difference between the maximum and minimum luminance in a scene; this is often measured in nits (candelas per square centimeter). Real world scenes, such as this sunset, often have dynamic ranges of 10 orders of magnitude of luminance; the human eye can discern an even greater range after adaptation.

Ever since Direct3D 9, graphics engines have been able to internally render their scenes with this level of physically accurate fidelity. However, a typical standard dynamic range display can reproduce only a little more than 3 orders of magnitude of luminance, and therefore any HDR-rendered content had to be tonemapped (compressed) into the limited range of the display. New HDR displays, including those that comply with the HDR10 (BT.2100) standard, break through this limitation; for example, high quality self-emissive displays can achieve greater than 6 orders of magnitude.

Color gamut refers to the range and saturation of hues that a display can reproduce. The most saturated natural colors the human eye can perceive consist of pure, monochromatic light such as that produced by lasers. However, mainstream consumer displays can often reproduce colors only within the sRGB gamut, which represents only about 35% of all human-perceivable colors. The diagram below is a representation of the human "spectral locus", or all perceivable colors (at a given luminance level), where the smaller triangle is the sRGB gamut.

High end, professional PC displays have long supported color gamuts that are significantly wider than sRGB, such as Adobe RGB and DCI-P3 which cover around half of human-perceivable colors. And these wide gamut displays are becoming more common.

Windows has provided color management support APIs since Windows 2000 with the Image Color Management (ICM) and later Windows Color System (WCS) APIs. However, those APIs were only helpers for apps that wished/required to do color management; while most apps and digital content simply assumed the industry standard sRGB color space, and were never color-managed by the OS. That was a reasonable assumption in the past, but high-quality wide gamut displays are becoming much more common.

New versions of Windows support automatic system color management; that ensures that all colors in every Windows app, whether or not they are color-aware, appear accurately and consistently on every supported display.

Numerical precision, or bit depth, refers to the amount of information used to uniquely identify colors. Higher bit depth means that you can distinguish between very similar colors without artifacts such as banding. Mainstream PC displays support 8 bits per color channel, while the human eye requires at least 10-12 bits of precision to avoid perceivable distortions.

Prior to Advanced Color, the Desktop Window Manager (DWM) restricted windowed apps to output content at only 8 bits per color channel, even if the display supported a higher bit depth. When Advanced Color is enabled, the DWM performs its composition using IEEE half-precision floating point (FP16), eliminating any bottlenecks, and allowing the full precision of the display to be used.

For decades, consumer displays and the Windows graphics stack were based around 8 bits per channel (24 bits per pixel) sRGB content. Apps using graphics APIs such as DirectX could perform internal rendering using high bit-depths and extended color spaces; however, the OS supported only 8-bit integer with implicit sRGB and no system color management:

HDR signaling over display connectors such as DisplayPort and HDMI primarily uses 10 bits per channel precision (or greater) and the BT.2100 ST.2084 color space. The display kernel, display driver, and underlying GPU hardware all need to support detecting, selecting, and driving this signaling mode.

The BT.2100 ST.2084 color space is an efficient standard for encoding HDR colors, but it's not well suited for many rendering and composition (blending) operations. We also want to future proof the OS to support technologies and color spaces well beyond BT.2100, which covers less than 2/3 of human-visible colors. Finally, where possible we want to minimize GPU resource consumption in order to improve power and performance.

That provides a good balance between all of the above goals. CCCS allows color values outside of the [0, 1] numeric range; given the range of valid FP16 values, it can represent orders of magnitude more colors than the natural human visual range, including luminance values over 5 million nits. FP16 has excellent precision for linear gamma blend operations, but costs half the GPU memory consumption and bandwidth of traditional single precision (FP32) with no perceivable quality loss.

Windows is a multitasking environment where the user can run any number of SDR and HDR apps at the same time with overlapping windows. Therefore, it's crucial that all types of content look correct and at maximum quality when output to a display; for example, an sRGB (SDR) productivity app with a BT.2100 ST.2084 (HDR) video window playing over it.

While the prevalence of HDR displays is growing rapidly, SDR displays will remain important for years to come. HDR support in Windows 10, version 1703 laid most of the groundwork needed to enhance SDR displays too. Windows 11, version 22H2 extends Advanced Color and auto color management capabilities to certain qualifying SDR displays. The graphics block diagram for Advanced Color SDR displays looks very similar to HDR:

DWM Advanced Color functionality including blending in CCCS is almost entirely unchanged from HDR displays. The main difference is that DWM uses display-referred luminance with SDR displays, and scene-referred luminance with HDR displays. This changes the way that your Advanced Color rendered content is interpreted by the OS:

OS system color management capabilities are also mostly unchanged from HDR displays. The main difference is that the display kernel converts to the display-referred color space as defined by the display's colorimetry and calibration data, instead of the standard BT.2100 ST.2084 color space for HDR displays.

Accurate data from an MHC ICC profile is needed to define the display kernel's output color management operation. Therefore, only SDR displays that have been specifically provisioned by the manufacturer or a display calibration provider with a valid profile are eligible for auto color management. See ICC profile behavior with Advanced Color for more info.

A high dynamic range display must implement the HDR10, or BT.2100 ST.2084, standard. HDR display quality can vary greatly, and we strongly recommend displays that are certified, such as VESA DisplayHDR. Starting with the Windows 11, version 22H2 release, Windows displays the certification status of known displays in the Settings app.

A standard dynamic range display must have accurate color provisioning data for Advanced Color support. In the Windows 11, version 22H2 release, the only supported method to override this data is via an MHC ICC profile; in addition, the user or display manufacturer must have enabled auto color management. For more info, see ICC profile behavior with Advanced Color.

Additional hardware requirements might apply, depending on the scenarios, including hardware codec acceleration (10 bit HEVC, 10 bit VP9, etc.) and PlayReady support (SL3000). Contact your GPU vendor for more specific information.

The latest available graphics driver is strongly recommended, either from Windows Update or from the GPU vendor or PC manufacturer's website. This topic relies on driver functionality from WDDM 2.7 (Windows 10, version 2004) for HDR displays, and WDDM 3.0 (Windows 11, version 21H2) for SDR displays.

Windows 10 supports a wide variety of rendering APIs and frameworks. Advanced color support fundamentally relies on your app being able to perform modern presentation using either DXGI or the Visual Layer APIs.

Windows 10 supports an enormous range of Advanced Color-capable displays, from power-efficient integrated panels to high-end gaming monitors and TVs. Windows users expect that your app will seamlessly handle all of those variations, including ubiquitous existing SDR displays.

Windows 10 provides control over HDR and Advanced Color capabilities to the user. Your app must detect the current display's configuration, and respond dynamically to any changes in capability. That could occur for many reasons, for example, because the user enabled or disabled a feature, or moved the app between different displays, or the system's power state changed.

The AdvancedColorInfo Windows Runtime API is usable independently of the rendering API, supports Advanced Color for SDR displays, and uses events to signal when capabilities change. However, it's available only for Universal Windows Platform (UWP) apps; desktop apps (which don't have a CoreWindow) can't use it. For more info, see Windows Runtime APIs not supported in desktop apps.

To check what Advanced Color kind is currently active, use the AdvancedColorInfo::CurrentAdvancedColorKind property. That's the most important property to check, and you should configure your render and presentation pipeline in response to the active kind: