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>
117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
/*
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* gfx_demo16 — exercises the 640×256×16 (mode 0x82) primitives.
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*
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* Stages (press a key to advance):
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* 1. 1-pixel frame via hline/vline16 — verifies edge alignment
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* (odd-x and odd-(x+len) RMW paths)
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* 2. Nested rectangles in cycled colours
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* 3. Colour bars — 16 vertical stripes, each colour 0..15
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* (palette readability test)
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* 4. Diagonal star + axis-aligned cross via line16
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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[16 * 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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static void build_palette(void)
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{
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/* 16-color palette: index 0 = black, 1..7 = primary ramp,
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* 8..15 = mid/light variants. Order chosen so neighbouring
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* indices contrast in the colour-bars test. */
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static const uint8_t bgr[16][3] = {
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{0x00, 0x00, 0x00}, /* 0 black */
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{0x00, 0x00, 0xFF}, /* 1 red */
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{0x00, 0xFF, 0x00}, /* 2 green */
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{0xFF, 0x00, 0x00}, /* 3 blue */
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{0x00, 0xFF, 0xFF}, /* 4 yellow */
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{0xFF, 0x00, 0xFF}, /* 5 magenta */
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{0xFF, 0xFF, 0x00}, /* 6 cyan */
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{0xFF, 0xFF, 0xFF}, /* 7 white */
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{0x40, 0x40, 0x40}, /* 8 dim grey */
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{0x40, 0x40, 0xFF}, /* 9 light red */
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{0x40, 0xFF, 0x40}, /* A light green */
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{0xFF, 0x40, 0x40}, /* B light blue */
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{0x40, 0xFF, 0xFF}, /* C light yellow */
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{0xFF, 0x40, 0xFF}, /* D light magenta */
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{0xFF, 0xFF, 0x40}, /* E light cyan */
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{0xA0, 0xA0, 0xA0}, /* F grey */
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};
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for (int i = 0; i < 16; i++) {
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palette[i * 4 + 0] = bgr[i][0];
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palette[i * 4 + 1] = bgr[i][1];
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palette[i * 4 + 2] = bgr[i][2];
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palette[i * 4 + 3] = 0;
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}
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}
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int main(void)
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{
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build_palette();
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uint8_t prev = gfx_init(GFX_MODE_640x256x16, 0);
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gfx_pal_load(0, 0, 16, palette);
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/* --- Stage 1: 1-px frame at edges -------------------------------- */
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gfx_clear16(8); /* dim grey */
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gfx_hline16(0, 0, GFX_WIDTH_16, 7); /* white top */
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gfx_hline16(0, GFX_HEIGHT_16 - 1, GFX_WIDTH_16, 7); /* white bottom */
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gfx_vline16(0, 0, GFX_HEIGHT_16, 7);
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gfx_vline16(GFX_WIDTH_16 - 1, 0, GFX_HEIGHT_16, 7);
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/* 1-px inset purple frame — exercises odd-x edges. */
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gfx_hline16(1, 1, GFX_WIDTH_16 - 2, 5);
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gfx_hline16(1, GFX_HEIGHT_16 - 2, GFX_WIDTH_16 - 2, 5);
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gfx_vline16(1, 2, GFX_HEIGHT_16 - 4, 5);
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gfx_vline16(GFX_WIDTH_16 - 2, 2, GFX_HEIGHT_16 - 4, 5);
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wait_key();
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/* --- Stage 2: nested rectangles --------------------------------- */
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gfx_clear16(0);
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for (int i = 0; i < 16; i++)
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gfx_rect16(i * 20, i * 8,
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GFX_WIDTH_16 - i * 40,
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GFX_HEIGHT_16 - i * 16,
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(uint8_t)((i + 1) & 0x0F));
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wait_key();
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/* --- Stage 3: vertical color bars ------------------------------- */
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gfx_clear16(0);
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/* 16 bars × 40 px wide = 640 px exactly. */
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for (int i = 0; i < 16; i++)
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gfx_fill_rect16(i * 40, 0, 40, GFX_HEIGHT_16, (uint8_t)i);
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wait_key();
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/* --- Stage 4: diagonal star + cross ----------------------------- */
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gfx_clear16(0);
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int cx = GFX_WIDTH_16 / 2, cy = GFX_HEIGHT_16 / 2;
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for (int i = 0; i < 16; i++) {
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int ex = i * (GFX_WIDTH_16 - 1) / 15;
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gfx_line16(cx, cy, ex, 0, 7);
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gfx_line16(cx, cy, ex, GFX_HEIGHT_16 - 1, 3);
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}
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for (int i = 0; i < 16; i++) {
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int ey = i * (GFX_HEIGHT_16 - 1) / 15;
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gfx_line16(cx, cy, 0, ey, 1);
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gfx_line16(cx, cy, GFX_WIDTH_16 - 1, ey, 2);
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}
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/* axis-aligned cross to verify hline/vline alignment at runtime. */
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gfx_hline16(0, cy, GFX_WIDTH_16, 6);
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gfx_vline16(cx, 0, GFX_HEIGHT_16, 6);
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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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