Viewable tap-to-zoom image viewer: full-screen zoom + panel loupe (#478). More...

#include <stddef.h>
#include <stdint.h>
#include "ez_scene.h"
#include "ra8_board_ek_ra8d2.h"
#include "ra8_board_ek_ra8d2_touch.h"
#include "ra8_boot_entry.h"
#include "ra8_cgc.h"
#include "ra8_display_pal.h"
#include "ra8_display_pal_lcd.h"
#include "ra8_err.h"
#include "ra8_gfx.h"
#include "ra8_isr.h"
#include "ra8_mstp.h"
#include "ra8_panel.h"
#include "ra8_panel_timing.h"
#include "ra8_sdramc.h"
#include "ra8_time.h"
#include "ra8_touch.h"

Include dependency graph for main.c:

Enumerations
enum	ez_boot_t : uint32_t { k_ez_uart_baud = 115200U , k_ez_settle_ms = 500U , k_ez_frame_ms = 25U , k_ez_led_every = 16U , k_ez_touch_max_points = 1U }
	Boot, console and touch knobs. More...
enum	ez_fb_t : uint16_t { k_ez_fb_w = k_panel_width_px , k_ez_fb_h = k_panel_height_px }
	Framebuffer geometry (mirrors the EK-RA8D2 panel). More...
enum	ez_print_t : uint8_t { k_ez_hex_nibbles = 8U , k_ez_nibble_bits = 4U , k_ez_nibble_mask = 0x0FU , k_ez_dec_ten = 10U }
	Decimal / hexadecimal formatting constants for the banner. More...

Functions
	RA8_BOARD_PANEL_FRAMEBUFFER (s_framebuffer)
static void	ez_print (const uint8_t *msg, uint32_t len)
	Emit a byte run on the console.
static void	ez_panic_halt (const uint8_t *msg, uint32_t len)
	Print a fail banner, then trap (ra8_emulator halts on the BKPT).
static void	ez_print_hex (uint32_t value)
	Print a 32-bit value as 8 upper-case hex digits.
static void	ez_print_uint (uint32_t value)
	Print a small unsigned integer in decimal.
static void	ez_bringup_clocks (void)
	Bring up clocks, MSTP, system tick, LEDs and the SCI console.
static void	ez_bringup_panel (void)
	Bring up SDRAM + the GLCDC panel, then bind ra8_gfx to the FB.
static void	ez_bringup_touch (void)
	Open the GT911 touch controller (best-effort, polled).
static void	ez_flush (const ez_present_t *plan)
	Flush a scene plan through the PAL with the waveform it asked for.
static bool	ez_redraw (void)
	Render, then flush whatever the scene says changed.
static void	ez_print_banner (const ez_selftest_t *st)
	Print the deterministic boot banner (geometry + the four hashes).
static void	ez_poll_touch (bool *was_touching)
	Poll the GT911 once; on a fresh tap, mutate + redraw the viewport.
static bool	ez_setup_scene (void)
	Wire the scene over the SDRAM cache storage and the SRAM scratch.
void	main (void)
	App entry: panel bring-up -> tiled page -> self-check -> zoom loop.

Variables
static uint8_t	s_cell_mem [(size_t) k_ez_cells *(size_t) k_ez_cell_bytes]
	Tile-cache cell storage: k_ez_cells gray8 256x256 tiles, in SDRAM.
static ra8_keycache_cell_t	s_meta [k_ez_cells]
	Tile-cache link metadata, one entry per cell.
static ra8_tile_key_t	s_keys [k_ez_cells]
	Tile-cache key storage, one entry per cell.
static ra8_tile_dims_t	s_dims [k_ez_cells]
	Tile-cache decoded-extent descriptors, one entry per cell.
static int32_t	s_buckets [k_ez_buckets]
	Tile-cache hash-bucket heads.
static uint8_t	s_row [k_ez_row_bytes]
	Composite scratch: one source row at the widest viewport (SRAM).
static uint8_t	s_strip [k_ez_strip_bytes]
	Composite scratch: the gray8 destination strip (SRAM).
static uint8_t	s_packed [k_ez_packed_bytes]
	Composite scratch: the dithered strip packed to 4 bpp (SRAM).
static const display_cfg_t	k_ez_display_cfg
	Display PAL configuration: LCD/GLCDC backend over the SDRAM framebuffer.
static display_handle_t *	s_display = nullptr
	Display PAL handle returned by display_init.
static display_fb_t	s_fb
	Mutable copy of the framebuffer descriptor, populated at boot.
static ez_scene_t	s_scene
	The demo scene: tiled page, zoom viewport and loupe.
static const uint8_t	k_msg_boot [] = "ereader-zoom: boot\r\n"
	Console banner fragment: boot line.
static const uint8_t	k_msg_fail [] = "ereader-zoom: FAIL init\r\n"
	Console banner fragment: bring-up failure.
static const uint8_t	k_msg_scene [] = "ereader-zoom: FAIL scene\r\n"
	Console banner fragment: scene wiring failure.
static const uint8_t	k_msg_rend [] = "ereader-zoom: FAIL render\r\n"
	Console banner fragment: render / self-check failure.
static const uint8_t	k_msg_pre [] = "ereader-zoom: page "
	Console banner fragment: geometry prefix.
static const uint8_t	k_msg_x [] = "x"
	Console banner fragment: dimension separator.
static const uint8_t	k_msg_tile [] = " tile "
	Console banner fragment: tile edge label.
static const uint8_t	k_msg_cells [] = " cells "
	Console banner fragment: cache cell-count label.
static const uint8_t	k_msg_z1 [] = " z1="
	Console banner fragment: 1:1 render hash label.
static const uint8_t	k_msg_pan [] = " pan="
	Console banner fragment: panned render hash label.
static const uint8_t	k_msg_z2 [] = " z2="
	Console banner fragment: 2x render hash label.
static const uint8_t	k_msg_lens [] = " lens="
	Console banner fragment: loupe render hash label.
static const uint8_t	k_msg_hit [] = " hit="
	Console banner fragment: cache hit counter label.
static const uint8_t	k_msg_miss [] = " miss="
	Console banner fragment: cache miss counter label.
static const uint8_t	k_msg_evict [] = " evict="
	Console banner fragment: cache eviction counter label.
static const uint8_t	k_msg_warm [] = " warm="
	Console banner fragment: prefetch counter label.
static const uint8_t	k_msg_ok [] = " ok\r\n"
	Console banner fragment: success suffix.

Detailed Description

Viewable tap-to-zoom image viewer: full-screen zoom + panel loupe (#478).

Tag: [Ring 7 / App] {World: NS}

The other half of the decision not to downscale .rabook images: keep every pixel at import, and let the reader magnify into them. This app makes that viewable. It brings up the 1024x600 GLCDC panel, binds a 4096x3072 gray8 page – 12 MiB, an order of magnitude past what the part can hold – through an ::ra8_tile_cache, and drives it with the zoom viewport engine:

Boot clocks / MSTP / SysTick / LEDs, then SDRAM and the GLCDC panel (ra8_display_pal with k_display_backend_lcd_ra8_glcdc), then bind ra8_gfx to the RGB565 framebuffer in SDRAM.
Wire the tile cache (decode-on-miss = the procedural page sampler) and open two viewports over it: the full content area, and a 320x320 loupe.
Run the scripted boot self-check – 1:1, one pan step, 2x about a fixed panel point, then the 4x loupe – printing a framebuffer hash for each plus the cache's own residency counters.
Main loop: poll the GT911, route the tap to a zone, re-render, and flush only what changed with the waveform zoom asks for – A2 during an interactive burst, GC16 once the gesture settles.

The banner is deterministic because every stage is integer arithmetic (the sampler is shifts and masks, the composite is nearest-neighbour plus a const blue-noise mask, and the chrome is filled rectangles rather than antialiased glyphs), so it is identical on host, ra8_emulator and silicon:

ereader-zoom: page 4096x3072 tile 256 cells 35 z1=<8hex> pan=<8hex> z2=<8hex> lens=<8hex> hit=<n> miss=<n> evict=<n> warm=<n> ok

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

Since: 0.1.0

Definition in file main.c.

Enumeration Type Documentation

◆ ez_boot_t

enum ez_boot_t : uint32_t

Boot, console and touch knobs.

Copied from the sibling reader demos so every viewable app on this board brings the console and the GT911 up the same way.

Invariant: k_ez_frame_ms is short enough that a tap is never missed.

Example:: (void)ra8_board_uart_console_init((uint32_t)k_ez_uart_baud);

k_ez_uart_baud
@ k_ez_uart_baud
Console baud.
Definition main.c:74

ra8_board_uart_console_init
ra8_err_t ra8_board_uart_console_init(uint32_t baud)
Configure SCI8 + PD02/PD03 as the debug-console UART.
Definition ra8_board_ek_ra8d2_comms.c:240

See also: main

Since: 0.1.0

Enumerator
k_ez_uart_baud	Console baud.
k_ez_settle_ms	PLL / SDRAM / panel-POR settle.
k_ez_frame_ms	Input poll period, ms.
k_ez_led_every	Heartbeat LED toggle sub-cadence.
k_ez_touch_max_points	One contact = one tap.

Definition at line 73 of file main.c.

◆ ez_fb_t

enum ez_fb_t : uint16_t

Framebuffer geometry (mirrors the EK-RA8D2 panel).

Held separately from the panel constants so the scene's layout asserts have compile-time numbers to check against.

Invariant: k_ra8_board_fb_align_bytes is a multiple of the AXI burst length.

Example:: static uint16_t s_framebuffer[(size_t)k_ez_fb_h * (size_t)k_ez_fb_w];

s_framebuffer
static uint16_t s_framebuffer[(size_t) k_panel_height_px *(size_t) k_panel_width_px]
1024x600 RGB565 framebuffer in external SDRAM (GLCDC scans this).
Definition main.c:67

k_ez_fb_h
@ k_ez_fb_h
Framebuffer height, pixels.
Definition main.c:96

k_ez_fb_w
@ k_ez_fb_w
Framebuffer width, pixels.
Definition main.c:95

See also: main

Since: 0.1.0

Enumerator
k_ez_fb_w	Framebuffer width, pixels.
k_ez_fb_h	Framebuffer height, pixels.

Definition at line 94 of file main.c.

◆ ez_print_t

enum ez_print_t : uint8_t

Decimal / hexadecimal formatting constants for the banner.

The banner is emitted without printf (no float, no heap), so the radix and nibble geometry are named here rather than inlined.

Invariant: k_ez_nibble_mask == (1 << k_ez_nibble_bits) - 1.

Example:: ez_print_hex(st.crc_1x);

ez_print_hex
static void ez_print_hex(uint32_t value)
Print a 32-bit value as 8 upper-case hex digits.
Definition main.c:314

See also: ez_print_banner

Since: 0.1.0

Enumerator
k_ez_hex_nibbles	Hex digits in a 32-bit value.
k_ez_nibble_bits	Bits per hex nibble.
k_ez_nibble_mask	Low-nibble mask.
k_ez_dec_ten	Decimal radix.

Definition at line 112 of file main.c.

Function Documentation

◆ ez_bringup_clocks()

void ez_bringup_clocks ( void )

static

Bring up clocks, MSTP, system tick, LEDs and the SCI console.

Definition at line 345 of file main.c.

References ez_panic_halt(), k_ez_uart_baud, k_msg_fail, k_ra8_board_led_blue, k_ra8_board_led_red, k_ra8_clock_id_cpuclk0, k_ra8_ok, ra8_board_led_init(), ra8_board_uart_console_init(), ra8_cgc_get_clock_hz(), ra8_cgc_init(), ra8_isr_globals_enable(), ra8_mstp_init(), and ra8_time_init().

Referenced by main().

◆ ez_bringup_panel()

void ez_bringup_panel ( void )

static

Bring up SDRAM + the GLCDC panel, then bind ra8_gfx to the FB.

Definition at line 368 of file main.c.

References display_get_framebuffer(), display_init(), ez_panic_halt(), k_ez_display_cfg, k_ez_settle_ms, k_msg_fail, k_ra8_gfx_format_rgb565, k_ra8_ok, ra8_delay_ms(), ra8_gfx_init(), ra8_sdramc_init(), s_display, and s_fb.

Referenced by main().

◆ ez_bringup_touch()

void ez_bringup_touch ( void )

static

Open the GT911 touch controller (best-effort, polled).

Definition at line 387 of file main.c.

References k_ez_touch_max_points, k_ra8_touch_irq_pin_unset, and ra8_board_touch_open().

Referenced by main().

◆ ez_flush()

void ez_flush ( const ez_present_t * plan )

static

Flush a scene plan through the PAL with the waveform it asked for.

Definition at line 395 of file main.c.

References display_flush(), ra8_ui_rect_t::h, k_display_refresh_fast, k_display_refresh_quality, ez_present_t::quality, ez_present_t::rect, s_display, ra8_ui_rect_t::w, ra8_ui_rect_t::x, and ra8_ui_rect_t::y.

Referenced by ez_redraw(), and main().

◆ ez_panic_halt()

void ez_panic_halt	(	const uint8_t *	msg,
		uint32_t	len )

static

Print a fail banner, then trap (ra8_emulator halts on the BKPT).

Definition at line 303 of file main.c.

References ez_print(), k_ra8_board_led_red, and ra8_board_led_on().

Referenced by ez_bringup_clocks(), ez_bringup_panel(), and main().

◆ ez_poll_touch()

void ez_poll_touch ( bool * was_touching )

static

Poll the GT911 once; on a fresh tap, mutate + redraw the viewport.

Definition at line 459 of file main.c.

References ez_redraw(), ez_scene_tap(), k_ra8_ok, ra8_time_ms(), ra8_touch_read(), s_scene, ra8_touch_point_t::x, and ra8_touch_point_t::y.

Referenced by main().

◆ ez_print()

void ez_print	(	const uint8_t *	msg,
		uint32_t	len )

static

Emit a byte run on the console.

Definition at line 297 of file main.c.

References ra8_board_uart_console_write().

Referenced by ez_panic_halt(), ez_print_banner(), ez_print_hex(), ez_print_uint(), and main().

◆ ez_print_banner()

void ez_print_banner ( const ez_selftest_t * st )

static

Print the deterministic boot banner (geometry + the four hashes).

Definition at line 429 of file main.c.

References ez_selftest_t::crc_1x, ez_selftest_t::crc_2x, ez_selftest_t::crc_lens, ez_selftest_t::crc_pan, ez_selftest_t::evictions, ez_print(), ez_print_hex(), ez_print_uint(), ez_selftest_t::hits, k_ez_cells, k_ez_page_h, k_ez_page_w, k_ez_tile_edge, k_msg_cells, k_msg_evict, k_msg_hit, k_msg_lens, k_msg_miss, k_msg_ok, k_msg_pan, k_msg_pre, k_msg_tile, k_msg_warm, k_msg_x, k_msg_z1, k_msg_z2, ez_selftest_t::misses, and ez_selftest_t::warmed.

Referenced by main().

◆ ez_print_hex()

void ez_print_hex ( uint32_t value )

static

Print a 32-bit value as 8 upper-case hex digits.

Definition at line 314 of file main.c.

References ez_print(), k_ez_dec_ten, k_ez_hex_nibbles, k_ez_nibble_bits, and k_ez_nibble_mask.

Referenced by ez_print_banner().

◆ ez_print_uint()

void ez_print_uint ( uint32_t value )

static

Print a small unsigned integer in decimal.

Definition at line 326 of file main.c.

References ez_print(), and k_ez_dec_ten.

Referenced by ez_print_banner().

◆ ez_redraw()

bool ez_redraw ( void )

static

Render, then flush whatever the scene says changed.

Definition at line 413 of file main.c.

References ez_flush(), ez_scene_present(), ez_scene_render(), k_ra8_ok, ez_present_t::present, and s_scene.

Referenced by ez_poll_touch(), and main().

◆ ez_setup_scene()

bool ez_setup_scene ( void )

static

Wire the scene over the SDRAM cache storage and the SRAM scratch.

Definition at line 476 of file main.c.

References ez_scene_init(), k_ez_fb_h, k_ez_fb_w, k_ra8_ok, s_buckets, s_cell_mem, s_dims, s_framebuffer, s_keys, s_meta, s_packed, s_row, s_scene, and s_strip.

Referenced by main().

◆ main()

void main ( void )

App entry: panel bring-up -> tiled page -> self-check -> zoom loop.

The application entry point Reset_Handler hands control to.

Precondition: Reset_Handler copied .data and zeroed .bss.; SystemInit set VTOR / FPU / priority grouping.

Postcondition: The boot banner is emitted; the reader loop services taps forever.

Since: 0.1.0

Definition at line 502 of file main.c.

References ez_bringup_clocks(), ez_bringup_panel(), ez_bringup_touch(), ez_content_rect(), ez_flush(), ez_panic_halt(), ez_poll_touch(), ez_print(), ez_print_banner(), ez_redraw(), ez_scene_selftest(), ez_scene_tick(), ez_setup_scene(), k_ez_fb_h, k_ez_fb_w, k_ez_frame_ms, k_ez_led_every, k_msg_boot, k_msg_rend, k_msg_scene, k_ra8_board_led_blue, k_ra8_ok, ra8_board_led_toggle(), ra8_delay_ms(), ra8_time_ms(), and s_scene.

◆ RA8_BOARD_PANEL_FRAMEBUFFER()

RA8_BOARD_PANEL_FRAMEBUFFER ( s_framebuffer )

References s_framebuffer.

Variable Documentation

◆ k_ez_display_cfg

const display_cfg_t k_ez_display_cfg

static

Initial value:

                                            = {
  .iface             = &k_display_backend_lcd_ra8_glcdc,
  .framebuffer       = s_framebuffer,
  .framebuffer_bytes = sizeof(s_framebuffer),
  .width_px          = (uint16_t)k_ez_fb_w,
  .height_px         = (uint16_t)k_ez_fb_h,
  .pixfmt            = k_display_pixfmt_rgb565,
  .panel_timing      = &s_ra8_panel_ek_ra8d2_timing,
}

Display PAL configuration: LCD/GLCDC backend over the SDRAM framebuffer.

Immutable; the PAL copies what it needs at display_init.

Note: Read once at boot.

Warning: Changing the pixel format here must match the ra8_gfx binding.

Since: 0.1.0

Definition at line 221 of file main.c.

Referenced by ez_bringup_panel().

◆ k_msg_boot

const uint8_t k_msg_boot[] = "ereader-zoom: boot\r\n"

static

Console banner fragment: boot line.

Definition at line 262 of file main.c.

◆ k_msg_cells

const uint8_t k_msg_cells[] = " cells "

static

Console banner fragment: cache cell-count label.

Definition at line 276 of file main.c.

Referenced by ez_print_banner().

◆ k_msg_evict

const uint8_t k_msg_evict[] = " evict="

static

Console banner fragment: cache eviction counter label.

Definition at line 290 of file main.c.

Referenced by ez_print_banner().

◆ k_msg_fail

const uint8_t k_msg_fail[] = "ereader-zoom: FAIL init\r\n"

static

Console banner fragment: bring-up failure.

Definition at line 264 of file main.c.

◆ k_msg_hit

const uint8_t k_msg_hit[] = " hit="

static

Console banner fragment: cache hit counter label.

Definition at line 286 of file main.c.

Referenced by ez_print_banner(), and imp_run().

◆ k_msg_lens

const uint8_t k_msg_lens[] = " lens="

static

Console banner fragment: loupe render hash label.

Definition at line 284 of file main.c.

Referenced by ez_print_banner().

◆ k_msg_miss

const uint8_t k_msg_miss[] = " miss="

static

Console banner fragment: cache miss counter label.

Definition at line 288 of file main.c.

Referenced by ez_print_banner(), imp_run(), and main().

◆ k_msg_ok

const uint8_t k_msg_ok[] = " ok\r\n"

static

Console banner fragment: success suffix.

Definition at line 294 of file main.c.

◆ k_msg_pan

const uint8_t k_msg_pan[] = " pan="

static

Console banner fragment: panned render hash label.

Definition at line 280 of file main.c.

Referenced by ez_print_banner().

◆ k_msg_pre

const uint8_t k_msg_pre[] = "ereader-zoom: page "

static

Console banner fragment: geometry prefix.

Definition at line 270 of file main.c.

◆ k_msg_rend

const uint8_t k_msg_rend[] = "ereader-zoom: FAIL render\r\n"

static

Console banner fragment: render / self-check failure.

Definition at line 268 of file main.c.

◆ k_msg_scene

const uint8_t k_msg_scene[] = "ereader-zoom: FAIL scene\r\n"

static

Console banner fragment: scene wiring failure.

Definition at line 266 of file main.c.

Referenced by main().

◆ k_msg_tile

const uint8_t k_msg_tile[] = " tile "

static

Console banner fragment: tile edge label.

Definition at line 274 of file main.c.

◆ k_msg_warm

const uint8_t k_msg_warm[] = " warm="

static

Console banner fragment: prefetch counter label.

Definition at line 292 of file main.c.

Referenced by ez_print_banner().

◆ k_msg_x

const uint8_t k_msg_x[] = "x"

static

Console banner fragment: dimension separator.

Definition at line 272 of file main.c.

◆ k_msg_z1

const uint8_t k_msg_z1[] = " z1="

static

Console banner fragment: 1:1 render hash label.

Definition at line 278 of file main.c.

Referenced by ez_print_banner().

◆ k_msg_z2

const uint8_t k_msg_z2[] = " z2="

static

Console banner fragment: 2x render hash label.

Definition at line 282 of file main.c.

Referenced by ez_print_banner().

◆ s_buckets

int32_t s_buckets[k_ez_buckets]

static

Tile-cache hash-bucket heads.

Sized above the cell count so lookups stay near O(1).

Note: Owned by the tile cache.

Warning: Do not write outside ra8_tile_cache.

Since: 0.1.0

Definition at line 180 of file main.c.

◆ s_cell_mem

uint8_t s_cell_mem[(size_t) k_ez_cells *(size_t) k_ez_cell_bytes]

static

Tile-cache cell storage: k_ez_cells gray8 256x256 tiles, in SDRAM.

The viewer's large working set. It lives here, not in the zoom engine, which is the whole point of the strip composite: the magnifier's own scratch is 25 KiB of SRAM.

Note: Owned by the tile cache once ez_scene_init has run.

Warning: Never addressed directly; the cache hands out pinned cells.

Since: 0.1.0

Definition at line 140 of file main.c.

◆ s_dims

ra8_tile_dims_t s_dims[k_ez_cells]

static

Tile-cache decoded-extent descriptors, one entry per cell.

Cross-checked against the declared tile geometry on every fetch.

Note: Owned by the tile cache.

Warning: Do not write outside ra8_tile_cache.

Since: 0.1.0

Definition at line 170 of file main.c.

◆ s_display

display_handle_t* s_display = nullptr

static

Display PAL handle returned by display_init.

NULL until the panel is up.

Note: Single display; the PAL rejects a second display_init.

Warning: Do not flush through this before bring-up completes.

Since: 0.1.0

Definition at line 239 of file main.c.

◆ s_fb

display_fb_t s_fb

static

Mutable copy of the framebuffer descriptor, populated at boot.

Used to bind ra8_gfx to whatever the PAL actually handed back.

Note: Written once during bring-up.

Warning: Stale until display_get_framebuffer has run.

Since: 0.1.0

Definition at line 249 of file main.c.

◆ s_keys

ra8_tile_key_t s_keys[k_ez_cells]

static

Tile-cache key storage, one entry per cell.

Compared byte-wise, so the cache zero-fills it at init.

Note: Owned by the tile cache.

Warning: Do not write outside ra8_tile_cache.

Since: 0.1.0

Definition at line 160 of file main.c.

◆ s_meta

ra8_keycache_cell_t s_meta[k_ez_cells]

static

Tile-cache link metadata, one entry per cell.

Small and hot, so it stays in internal SRAM rather than SDRAM.

Note: Owned by the tile cache.

Warning: Do not write outside ra8_tile_cache.

Since: 0.1.0

Definition at line 150 of file main.c.

◆ s_packed

uint8_t s_packed[k_ez_packed_bytes]

static

Composite scratch: the dithered strip packed to 4 bpp (SRAM).

Handed straight to ra8_gfx_blit_gray4_zoom.

Note: Shared by both viewports.

Warning: Overwritten by every zoom render.

Since: 0.1.0

Definition at line 211 of file main.c.

Referenced by ez_setup_scene(), internal_publish(), internal_publish_fragment(), and internal_workspace().

◆ s_row

uint8_t s_row[k_ez_row_bytes]

static

Composite scratch: one source row at the widest viewport (SRAM).

Part of the viewer's whole 25 KiB footprint; see ez_scene.h.

Note: Shared by both viewports (only one renders at a time).

Warning: Overwritten by every zoom render.

Since: 0.1.0

Definition at line 190 of file main.c.

Referenced by ez_setup_scene().

◆ s_scene

ez_scene_t s_scene

static

The demo scene: tiled page, zoom viewport and loupe.

All of the app's presentation state; see ez_scene.h.

Note: Single-threaded reader loop only.

Warning: Not valid until ez_scene_init returns k_ra8_ok.

Since: 0.1.0

Definition at line 259 of file main.c.

Referenced by ez_poll_touch(), ez_redraw(), ez_setup_scene(), and main().

◆ s_strip

uint8_t s_strip[k_ez_strip_bytes]

static

Composite scratch: the gray8 destination strip (SRAM).

16 destination rows at 1024 px; the strip height is derived from this capacity by zoom_view_open().

Note: Shared by both viewports.

Warning: Overwritten by every zoom render.

Since: 0.1.0

Definition at line 201 of file main.c.

Enumerations

Functions

Variables

Detailed Description

Enumeration Type Documentation

◆ ez_boot_t

◆ ez_fb_t

◆ ez_print_t

Function Documentation

◆ ez_bringup_clocks()

◆ ez_bringup_panel()

◆ ez_bringup_touch()

◆ ez_flush()

◆ ez_panic_halt()

◆ ez_poll_touch()

◆ ez_print()

◆ ez_print_banner()

◆ ez_print_hex()

◆ ez_print_uint()

◆ ez_redraw()

◆ ez_setup_scene()

◆ main()

◆ RA8_BOARD_PANEL_FRAMEBUFFER()

Variable Documentation

◆ k_ez_display_cfg

◆ k_msg_boot

◆ k_msg_cells

◆ k_msg_evict

◆ k_msg_fail

◆ k_msg_hit

◆ k_msg_lens

◆ k_msg_miss

◆ k_msg_ok

◆ k_msg_pan

◆ k_msg_pre

◆ k_msg_rend

◆ k_msg_scene

◆ k_msg_tile

◆ k_msg_warm

◆ k_msg_x

◆ k_msg_z1

◆ k_msg_z2

◆ s_buckets

◆ s_cell_mem

◆ s_dims

◆ s_display

◆ s_fb

◆ s_keys

◆ s_meta

◆ s_packed

◆ s_row

◆ s_scene

◆ s_strip