Flint::UICanvas Class Reference

Dynamic 2D batching engine processing shape vector geometry and hardware-accelerated text strings. *UICanvas acts as the graphics compositor for the UI layer. It intercepts layout draw commands, pools transient vertex lists into unified buffers to optimize pipeline state swaps, and coordinates a sliding frame cache system that automatically tracks and flushes unreferenced font textures from VRAM. More...

#include <flint/ui/ui-canvas.h>

Collaboration diagram for Flint::UICanvas:

Public Member Functions
	UICanvas (GPURenderer &renderer)
	Binds the UI renderer subsystem to the master application graphics context layout tree.
	UICanvas (const UICanvas &)=delete
UICanvas &	operator= (const UICanvas &)=delete
void	emit (RenderQueue &queue)
void	uploadGeometry (SDL_GPUCommandBuffer *cmd)
	Pass 1 of the render loop: Synchronizes local vertex lists down to the physical GPU VRAM.
void	flushDrawCalls (SDL_GPURenderPass *renderPass, SDL_GPUCommandBuffer *commandBuffer)
	Pass 2 of the render loop: Binds graphics pipelines and triggers draw execution commands.
void	setScreenSize (Vec2f size)
	Syncs internal display bounding metrics to transform absolute screen pixel bounds cleanly.
void	drawRect (Rect< float > rect, Color color)
	Submits a flat quad drawing sequence down to the current active runtime pipeline layer.
void	drawText (std::string text, float x, float y, float fontSize, Color color, std::string fontName="", uint16_t weight=400)
	Enqueues a string draw command record to be processed during the geometry generation pass.
void	drawTexture (const GPUTexture &texture, Rect< float > rect, Color tint={255, 255, 255, 255})
	Appends a geometric quad textured draw record down to the dynamic vertex batch structure arrays.
Vec2f	getScreenSize () const
	Returns the active window coordinates representing the screen boundaries.
Vec2f	measureText (const std::string &text, float fontSize, const std::string &fontName="", uint16_t weight=400)
	Calculates structural spatial dimensions a text block requires before executing layout renders.
float	getGlyphCenterOffset (const std::string &text, float fontSize, const std::string &fontName="", uint16_t weight=400)
bool	loadFont (std::vector< char > &&data, const std::string &fontName, uint16_t weight=400)
	Registers raw binary TTF font file data into the subsystem memory allocator.
void	setDefaultFont (const std::string &name)
	Assigns the base default fallback typography name token.
void	discardDrawCalls ()
	Instantly clears local staging arrays, abandoning all un-flushed vector and character draw steps.

Detailed Description

Dynamic 2D batching engine processing shape vector geometry and hardware-accelerated text strings. *UICanvas acts as the graphics compositor for the UI layer. It intercepts layout draw commands, pools transient vertex lists into unified buffers to optimize pipeline state swaps, and coordinates a sliding frame cache system that automatically tracks and flushes unreferenced font textures from VRAM.

Definition at line 106 of file ui-canvas.h.

---

The documentation for this class was generated from the following file:

• include/flint/ui/ui-canvas.h