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Harrison Lambeth 2025-01-08 21:03:10 -07:00
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@ -442,6 +442,36 @@ The debug tooling by default will render as a panel to the right side of the scr
_The official Clay website with debug tooling visible_ _The official Clay website with debug tooling visible_
### Running more than one Clay instance
Clay allows you to run more than one instance in a program. To do this, [Clay_Initialize](#clay_initialize) returns a [Clay_Context*](#clay_context) reference. You can activate a specific instance using [Clay_SetCurrentContext](#clay_setcurrentcontext). If [Clay_SetCurrentContext](#clay_setcurrentcontext) is not called, then Clay will default to using the context from the most recently called [Clay_Initialize](#clay_initialize).
**⚠ Important: Do not render instances across different threads simultaneously, as Clay does not currently support proper multi-threading.**
```c++
// Define separate arenas for the instances.
Clay_Arena arena1, arena2;
// ... allocate arenas
// Initialize both instances, storing the context for each one.
Clay_Context* instance1 = Clay_Initialize(arena1, layoutDimensions, errorHandler);
Clay_Context* instance2 = Clay_Initialize(arena2, layoutDimensions, errorHandler);
// In the program's render function, activate each instance before executing clay commands and macros.
Clay_SetCurrentContext(instance1);
Clay_BeginLayout();
// ... declare layout for instance1
Clay_RenderCommandArray renderCommands1 = Clay_EndLayout();
render(renderCommands1);
// Switch to the second instance
Clay_SetCurrentContext(instance2);
Clay_BeginLayout();
// ... declare layout for instance2
Clay_RenderCommandArray renderCommands2 = Clay_EndLayout();
render(renderCommands2);
```
# API # API
### Naming Conventions ### Naming Conventions
@ -486,7 +516,7 @@ Takes a pointer to a function that can be used to measure the `width, height` di
`void Clay_SetMaxElementCount(uint32_t maxElementCount)` `void Clay_SetMaxElementCount(uint32_t maxElementCount)`
Updates the internal maximum element count, allowing clay to allocate larger UI hierarchies. Sets the internal maximum element count that will be used in subsequent [Clay_Initialize()](#clay_initialize) and [Clay_MinMemorySize()](#clay_minmemorysize) calls, allowing clay to allocate larger UI hierarchies.
**Note: You will need to reinitialize clay, after calling [Clay_MinMemorySize()](#clay_minmemorysize) to calculate updated memory requirements.** **Note: You will need to reinitialize clay, after calling [Clay_MinMemorySize()](#clay_minmemorysize) to calculate updated memory requirements.**
@ -494,17 +524,29 @@ Updates the internal maximum element count, allowing clay to allocate larger UI
`void Clay_SetMaxMeasureTextCacheWordCount(uint32_t maxMeasureTextCacheWordCount)` `void Clay_SetMaxMeasureTextCacheWordCount(uint32_t maxMeasureTextCacheWordCount)`
Updates the internal text measurement cache size, allowing clay to allocate more text. The value represents how many seperate words can be stored in the text measurement cache. Sets the internal text measurement cache size that will be used in subsequent [Clay_Initialize()](#clay_initialize) and [Clay_MinMemorySize()](#clay_minmemorysize) calls, allowing clay to allocate more text. The value represents how many separate words can be stored in the text measurement cache.
**Note: You will need to reinitialize clay, after calling [Clay_MinMemorySize()](#clay_minmemorysize) to calculate updated memory requirements.** **Note: You will need to reinitialize clay, after calling [Clay_MinMemorySize()](#clay_minmemorysize) to calculate updated memory requirements.**
### Clay_Initialize ### Clay_Initialize
`void Clay_Initialize(Clay_Arena arena, Clay_Dimensions layoutDimensions, Clay_ErrorHandler errorHandler)` `Clay_Context* Clay_Initialize(Clay_Arena arena, Clay_Dimensions layoutDimensions, Clay_ErrorHandler errorHandler)`
Initializes the internal memory mapping, sets the internal dimensions for layout, and binds an error handler for clay to use when something goes wrong. Initializes the internal memory mapping, sets the internal dimensions for layout, and binds an error handler for clay to use when something goes wrong. Returns a [Clay_Context*](#clay_context) that can optionally be given to [Clay_SetCurrentContext](#clay_setcurrentcontext) to allow running multiple instances of clay in the same program, and sets it as the current context. See [Running more than one Clay instance](#running-more-than-one-clay-instance).
Reference: [Clay_Arena](#clay_createarenawithcapacityandmemory), [Clay_ErrorHandler](#clay_errorhandler) Reference: [Clay_Arena](#clay_createarenawithcapacityandmemory), [Clay_ErrorHandler](#clay_errorhandler), [Clay_SetCurrentContext](#clay_setcurrentcontext)
### Clay_SetCurrentContext
`void Clay_SetCurrentContext(Clay_Context* context)`
Sets the context that subsequent clay commands will operate on. You can get this reference from [Clay_Initialize](#clay_initialize) or [Clay_GetCurrentContext](#clay_getcurrentcontext). See [Running more than one Clay instance](#running-more-than-one-clay-instance).
### Clay_GetCurrentContext
`Clay_Context* Clay_GetCurrentContext()`
Returns the context that clay commands are currently operating on, or null if no context has been set. See [Running more than one Clay instance](#running-more-than-one-clay-instance).
### Clay_SetLayoutDimensions ### Clay_SetLayoutDimensions