emu_view_tile_internal.h File Reference

Internal bounded RGB565 tile rotation/writer. More...

#include "emu_presentation.h"
#include "ra8_attributes.h"

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Functions
bool	priv_emu_view_tile_write (emu_presentation_workspace_t *presentation, const uint16_t *source, uint16_t source_x, uint16_t source_y, uint16_t width, uint16_t height)
	Rotate and write one native-panel tile into its exact display location.

Detailed Description

Internal bounded RGB565 tile rotation/writer.

Declares the cross-translation-unit tile seam used by the streamed surface builder to rotate caller-supplied RGB565 spans directly into the checked presentation workspace.

Copyright

Copyright (c) 2026 Brighton Sikarskie SPDX-License-Identifier: MIT

Since

0.1.0

Definition in file emu_view_tile_internal.h.

Function Documentation

priv_emu_view_tile_write()

bool priv_emu_view_tile_write	(	emu_presentation_workspace_t *	presentation,
		const uint16_t *	source,
		uint16_t	source_x,
		uint16_t	source_y,
		uint16_t	width,
		uint16_t	height )

Rotate and write one native-panel tile into its exact display location.

Rotate and write one native-panel tile into its exact display location; this step is contained within the emu view tile model and uses bounded caller or module-owned storage.

Parameters

[in,out]	presentation	Descriptor-backed presentation workspace accessed by the operation.
[in]	source	Source input used by the operation.
[in]	source_x	Source x input used by the operation.
[in]	source_y	Source y input used by the operation.
[in]	width	Width of the affected region in pixels.
[in]	height	Height of the affected region in pixels.

Returns

The emu view tile write result produced by the emu view tile model.

Return values

true	The emu view tile write condition holds or completed successfully; false otherwise.

Precondition

Arguments satisfy the ranges documented for emu view tile write.

The call executes on the emulator's single owning thread.

Postcondition

State changes remain confined to the emu view tile model and documented output objects.

Ownership of caller-supplied storage is unchanged.

Note

The operation is synchronous and does not transfer heap ownership.

Since

0.1.0

Definition at line 154 of file emu_view_tile.c.

References internal_rotate_tile(), internal_tile_destination(), internal_write_rows(), k_emu_presentation_tile_px, emu_presentation_workspace_t::panel_height, emu_presentation_workspace_t::panel_width, emu_presentation_workspace_t::rotate_deg, emu_presentation_workspace_t::scratch, and tile_destination_t::width.

Referenced by internal_write_layer().