ra8-firmware/zoom__internal_8h_source.html

#pragma once


#include <stdint.h>


#include "ra8_attributes.h"


typedef struct {

  int32_t  d0;

  int32_t  d1;

  uint32_t s0;

  uint32_t count;

} zoom_axis_t;


RA8_PRIV

void priv_zoom_axis(int32_t      anchor,

                    int32_t      extent,

                    int32_t      scale,

                    int32_t      src_dim,

                    zoom_axis_t* out);

ra8_attributes.h
Annotation-attribute framework macros for ra8-firmware.

RA8_PRIV
#define RA8_PRIV
Module-private helper: shared across TUs but only inside one library.
Definition ra8_attributes.h:219

zoom_axis_t
One axis of the viewport resolved against the image: coverage + source span.
Definition zoom_internal.h:51

zoom_axis_t::count
uint32_t count
Source indices feeding the covered span (0 if none).
Definition zoom_internal.h:55

zoom_axis_t::d1
int32_t d1
One past the last covered destination offset.
Definition zoom_internal.h:53

zoom_axis_t::s0
uint32_t s0
First source index feeding the covered span.
Definition zoom_internal.h:54

zoom_axis_t::d0
int32_t d0
First covered destination offset inside the viewport.
Definition zoom_internal.h:52

priv_zoom_axis
void priv_zoom_axis(int32_t anchor, int32_t extent, int32_t scale, int32_t src_dim, zoom_axis_t *out)
Resolve one viewport axis against the image at the current magnification.
Definition zoom.c:60