snark13
737c974400
- Split tests/ (libc feature tests) and examples/ (real apps); shared
app.mk in repo root, was examples/example.mk
- libc/io/* split into libc/{conio,env,errno,file,mouse,string,sys,
time,video}/ — clearer module boundaries
- New examples/mdview/: markdown viewer (Phases 1-5 + light nested
lists). Headers (H1-H4), HR, ulist/olist/quote with nesting via
leading spaces, fenced code blocks, inline emphasis (bold/italic/
underscore/code), wrap/unwrap mode with soft wrap (F2), horizontal
pan (← →) with '>' truncation indicator
- libc additions: scroll() in conio (ESTEX SCROLL), strlwr/strupr,
gets() test
- Makefile updates across tests/ for the new shared app.mk path
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/*
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* gfx_demo — exercises the libc/gfx primitives. Shows:
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* 1. accelerator-backed gfx_clear256 / gfx_hline256 / gfx_vline256 / gfx_fill_rect256
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* 2. gfx_rect256 outline, gfx_line256 diagonals (Bresenham via putpixel)
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* 3. a grey-ramp palette
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*
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* Press a key to advance through each stage.
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*/
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#include <stdio.h>
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#include <conio.h>
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#include <gfx.h>
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#include <stdint.h>
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static uint8_t palette_data[256 * 4];
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static void wait_key(void)
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{
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__asm
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ld c, #0x30
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rst #0x10
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__endasm;
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}
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int main(void)
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{
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/* Grey ramp: (B=i, G=i, R=i, 0). */
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for (int i = 0; i < 256; i++) {
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palette_data[i * 4 + 0] = (uint8_t)i;
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palette_data[i * 4 + 1] = (uint8_t)i;
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palette_data[i * 4 + 2] = (uint8_t)i;
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palette_data[i * 4 + 3] = 0;
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}
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uint8_t prev = gfx_init(GFX_MODE_320x256x256, 0);
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gfx_pal_load(0, 0, 0, palette_data);
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/* --- Stage 1: orthogonal frame via hline / vline ----------------- */
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gfx_clear256(0x40);
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gfx_hline256(1, 1, GFX_WIDTH - 2, 0xFF);
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gfx_hline256(1, GFX_HEIGHT - 2, GFX_WIDTH - 2, 0xFF);
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gfx_vline256(1, 2, GFX_HEIGHT - 4, 0xFF);
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gfx_vline256(GFX_WIDTH - 2, 2, GFX_HEIGHT - 4, 0xFF);
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wait_key();
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/* --- Stage 2: nested rectangles -------------------------------- */
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gfx_clear256(0x20);
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for (int i = 0; i < 16; i++)
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gfx_rect256(i * 10, i * 8,
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GFX_WIDTH - i * 20,
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GFX_HEIGHT - i * 16,
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(uint8_t)(0x40 + i * 8));
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wait_key();
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/* --- Stage 3: filled-rect colour bars --------------------------- */
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gfx_clear256(0);
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/* Tall-narrow rects (w=20, h=128) — heuristic picks vertical orient. */
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for (int i = 0; i < 16; i++) {
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gfx_fill_rect256(i * 20, 0, 20, 128, (uint8_t)(i * 16));
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gfx_fill_rect256(i * 20 + 0, 128, 20, 128, (uint8_t)(255 - i * 16));
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}
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wait_key();
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/* --- Stage 3b: wide-short rects + a grid of small squares -------- */
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gfx_clear256(0x08);
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/* Wide-short stripes (w=320, h=16) — heuristic picks horizontal. */
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for (int i = 0; i < 8; i++)
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gfx_fill_rect256(0, i * 32, GFX_WIDTH, 16, (uint8_t)(0x40 + i * 24));
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/* 8×8 small squares grid (w=h, heuristic picks either — same cost). */
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for (int row = 0; row < 4; row++)
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for (int col = 0; col < 16; col++)
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gfx_fill_rect256(col * 20 + 4, 256 - 80 + row * 20, 12, 12,
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(uint8_t)((row * 16 + col) * 4));
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wait_key();
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/* --- Stage 4: diagonal lines via Bresenham ---------------------- */
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gfx_clear256(0x18);
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/* "Star" of lines from centre to a circle of endpoints. */
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int cx = GFX_WIDTH / 2, cy = GFX_HEIGHT / 2;
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for (int i = 0; i < 16; i++) {
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int ex = i * (GFX_WIDTH - 1) / 15;
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gfx_line256(cx, cy, ex, 0, 0xFF);
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gfx_line256(cx, cy, ex, GFX_HEIGHT - 1, 0xC0);
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}
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for (int i = 0; i < 16; i++) {
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int ey = i * (GFX_HEIGHT - 1) / 15;
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gfx_line256(cx, cy, 0, ey, 0x80);
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gfx_line256(cx, cy, GFX_WIDTH - 1, ey, 0x40);
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}
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/* Box outline using gfx_line256. */
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gfx_line256(0, 0, GFX_WIDTH - 1, 0, 0xFF);
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gfx_line256(0, GFX_HEIGHT - 1, GFX_WIDTH - 1, GFX_HEIGHT - 1, 0xFF);
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gfx_line256(0, 0, 0, GFX_HEIGHT - 1, 0xFF);
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gfx_line256(GFX_WIDTH - 1, 0, GFX_WIDTH - 1, GFX_HEIGHT - 1, 0xFF);
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wait_key();
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gfx_done(prev);
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puts("done");
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return 0;
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}
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