/* test/rdft_smoke.c — os.meow.reader FreeType 封装 qemu-mipsel 冒烟。
 * 在 mipsel 上初始化 rdft → 载入思源黑体/MiSans OTF → 定字号 → 取 CJK/拉丁字形度量 →
 * blend565 到 RGB565 缓冲 → 校验像素变化 → LRU 缓存 512 上限。可跑于 qemu-mipsel（静态）。
 *
 * 用法：qemu-mipsel ./test/rdft_smoke <font.otf>   （缺省用仓库 font/src/MiSans-Regular.otf）
 */
#include "rdft.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static int fails = 0;
#define CHECK(c, m) do { if (c) { printf("  ok  %s\n", m); } else { printf("FAIL  %s\n", m); fails++; } } while (0)

int main(int argc, char **argv)
{
    const char *font = (argc > 1) ? argv[1] : "/home/Aska/Project/R3ProII/font/src/MiSans-Regular.otf";
    rdft *r = NULL;
    CHECK(rdft_init(&r) == 0, "rdft_init");
    CHECK(r != NULL, "rdft non-null");

    CHECK(rdft_load_font(r, font) == 0, "rdft_load_font");
    CHECK(rdft_ascender(r) > 0, "ascender>0");
    printf("  family=%s ascender=%d descender=%d\n", rdft_family(r), rdft_ascender(r), rdft_descender(r));

    rdft_set_px(r, 20);
    /* 字形度量：你(U+4F60)/好(U+597D)/A/空格/软连字符 */
    const uint32_t cps[] = { 0x4F60, 0x597D, 'A', ' ', 0x00AD, 0x3002 };
    for (int i = 0; i < 6; i++) {
        int adv = 0, bw = 0, bh = 0, left = 0, top = 0;
        const uint8_t *bmp = NULL;
        CHECK(rdft_glyph(r, cps[i], &adv, &bmp, &bw, &bh, &left, &top) == 0, "glyph");
        printf("    cp=U+%04X adv=%d bmp=%dx%d left=%d top=%d\n", cps[i], adv, bw, bh, left, top);
        if (cps[i] == 'A') CHECK(adv > 5, "A advance>5");
        if (cps[i] == 0x4F60) CHECK(adv >= 16 && adv <= 22, "CJK adv ~20");
    }

    /* blend565：把「你」字画进一个 RGB565 缓冲（80×80，白底黑字），校验有像素变黑 */
    {
        int W = 80, H = 80;
        uint16_t *fb = (uint16_t*)malloc((size_t)W * H * 2);
        for (int i = 0; i < W * H; i++) fb[i] = 0xFFFF;   /* 白 */
        int adv = 0, bw = 0, bh = 0, left = 0, top = 0;
        const uint8_t *bmp = NULL;
        rdft_glyph(r, 0x4F60, &adv, &bmp, &bw, &bh, &left, &top);
        int baseline = 30;
        rdft_blend565(fb, W * 2, W, H, 10, baseline, bmp, bw, bh, left, top, 0x0000, 0xFFFF);
        int dark = 0;
        for (int i = 0; i < W * H; i++) if (fb[i] != 0xFFFF) dark++;
        CHECK(dark > 10, "blend produced dark pixels");
        free(fb);
    }

    /* LRU 缓存上限：请求 600 个不同码点 → used 应 ≤ 512 */
    {
        rdft_cache_set_slots(r, 512);
        for (uint32_t cp = 0x4E00; cp < 0x4E00 + 600; cp++) {
            int adv = 0, bw = 0, bh = 0, left = 0, top = 0;
            const uint8_t *bmp = NULL;
            rdft_glyph(r, cp, &adv, &bmp, &bw, &bh, &left, &top);
        }
        int used = rdft_cache_used(r);
        printf("  lru used=%d slots=%d\n", used, rdft_cache_slots(r));
        CHECK(used <= 512, "lru used <= 512");
        CHECK(used >= 1, "lru used >= 1");
    }

    rdft_free(r);
    printf("rdft_smoke: %s\n", fails ? "FAIL" : "PASS");
    return fails ? 1 : 0;
}