As normal framebuffer values are clamped between 0.0 and 1.0 it means that any light value above 1.0 gets clamped. Because of this its not really possible to differentiate really bright lights from normal lights. To take advantage of the light information that normally gets discarded we use a tone mapping algorithm to try and preserve it. This demo applies the tonemapping as a postprocessing step on the fully lit scene, so a temporary floating point framebuffer is needed.
This sample outputs to a LDR screen.
It renders the same scene two times:
| Area | Texture | High Dynamic Range |
|---|---|---|
| Left | SRGB | Off |
| Right | SRGB | On |
Inspired by:
The app can be controlled using:
| Key | Result |
|---|---|
| 1 | Fullscreen LDR rendering |
| 2 | Fullscreen HDR rendering |
| 3 | Split-screen rendering (default) |
| Q | Decrease exposure |
| E | Increase exposure |
| R | Reset exposure |
| A | Strafe left |
| W | Strafe right |
| S | Move forward |
| D | Move backward |
| Right Mouse | Mouse look (hold it) |
| Middle mouse | Reset camera |
Command line arguments':
| Argument | Description | Source |
|---|---|---|
| -s, --Scene <arg> | Select the scene to run (0 to 2) | Demo |
| --ActualDpi <arg> | ActualDpi [x,y] Override the actual dpi reported by the native window | DemoHost |
| --DensityDpi <arg> | DensityDpi <number> Override the density dpi reported by the native window | DemoHost |
| --DisplayId <arg> | DisplayId <number> | DemoHost |
| --LogExtensions | Output the extensions to the log | DemoHost |
| --LogLayers | Output the layers to the log | DemoHost |
| --LogSurfaceFormats | Output the supported surface formats to the log | DemoHost |
| --VkApiDump | Enable the VK_LAYER_LUNARG_api_dump layer. | DemoHost |
| --VkPhysicalDevice <arg> | Set the physical device index. | DemoHost |
| --VkPresentMode <arg> | Override the present mode with the supplied value. Known values: VK_PRESENT_MODE_IMMEDIATE_KHR (0), VK_PRESENT_MODE_MAILBOX_KHR (1), VK_PRESENT_MODE_FIFO_KHR (2), VK_PRESENT_MODE_FIFO_RELAXED_KHR (3), VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR (1000111000), VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR (1000111001) | DemoHost |
| --VkScreenshot <arg> | Enable/disable screenshot support (defaults to enabled) | DemoHost |
| --VkValidate <arg> | Enable/disable the VK_LAYER_LUNARG_standard_validation layer. | DemoHost |
| --Window <arg> | Window mode [left,top,width,height] | DemoHost |
| --AppFirewall | Enable the app firewall, reporting crashes on-screen instead of exiting | DemoHostManager |
| --ContentMonitor | Monitor the Content directory for changes and restart the app on changes.WARNING: Might not work on all platforms and it might impact app performance (experimental) | DemoHostManager |
| --ExitAfterDuration <arg> | Exit after the given duration has passed. The value can be specified in seconds or milliseconds. For example 10s or 10ms. | DemoHostManager |
| --ExitAfterFrame <arg> | Exit after the given number of frames has been rendered | DemoHostManager |
| --ForceUpdateTime <arg> | Force the update time to be the given value in microseconds (can be useful when taking a lot of screen-shots). If 0 this option is disabled | DemoHostManager |
| --LogStats | Log basic rendering stats (this is equal to setting LogStatsMode to latest) | DemoHostManager |
| --LogStatsMode <arg> | Set the log stats mode, more advanced version of LogStats. Can be disabled, latest, average | DemoHostManager |
| --ScreenshotFormat <arg> | Chose the format for the screenshot: bmp, jpg, png (default), tga | DemoHostManager |
| --ScreenshotFrequency <arg> | Create a screenshot at the given frame frequency | DemoHostManager |
| --ScreenshotNamePrefix <arg> | Chose the screenshot name prefix (defaults to 'Screenshot') | DemoHostManager |
| --ScreenshotNameScheme <arg> | Chose the screenshot name scheme: frame (default), sequence, exact. | DemoHostManager |
| --Stats | Display basic frame profiling stats | DemoHostManager |
| --StatsFlags <arg> | Select the stats to be displayed/logged. Defaults to frame|cpu. Can be 'frame', 'cpu' or any combination | DemoHostManager |
| --Version | Print version information | DemoHostManager |
| --Graphics.Profile | Enable graphics service stats | GraphicsService |
| --Profiler.AverageEntries <arg> | The number of frames used to calculate the average frame-time. Defaults to: 60 | ProfilerService |
| --ghelp <arg> | Display option groups: all, demo or host | base |
| -h, --help | Display options | base |
| -v, --verbose | Enable verbose output | base |