/* test_lock_render.c — 锁屏首帧「全屏不透明底」宿主断言（§310 问题2-①/②）。
 *
 * 背景（M6.4 真机）：超时息屏→亮屏进锁屏时，App 刷新控件盖到锁屏上、未刷新区显示锁屏自带脏区。
 * 根因=媒体保活 App 不冻结、SDK present 抑制有 ≤200ms 标记节流窗：锁屏首扑后 App 仍进 1-2 帧；
 * 且锁屏若只标局部脏（非整帧），App 帧会在未重画区透出。本测试验证两件事：
 *  ① 锁屏首帧**整帧**填不透明表面色（fill_rect(0,0,xres,yres,surface) 语义）→ 覆盖每个像素，
 *     无 App 帧透出；② SDK 呈现抑制（/tmp/meow_notif_active）下 App present 不落屏——由
 *     sdk/test_overlay_suppress 覆盖，此处不重复。
 *
 * 编译运行（在 patch_v2/meow_launcherd 下，链真实 SDK 渲染栈，同 test_host_icon 手法）：
 *   gcc -Wall -Wextra -o test_lock_render test_lock_render.c ../sdk/test_host_stub.c \
 *       ../sdk/meow_ui_gfx.c ../sdk/meow_ui_sys.c ../sdk/meow_ui_theme.c ../sdk/meow_ui_vol.c \
 *       ../sdk/meow_ui_log.c ../sdk/meow_ui_widget.c ../sdk/meow_ui_input.c ../sdk/meow_ui_activity.c \
 *       ../sdk/meow_ui_dialog.c ../sdk/meow_ui_ime.c ../sdk/meow_ui_str.c ../sdk/meow_ui_draw.c \
 *       ../sdk/meow_ui_view.c ../sdk/meow_notify_ipc.c ../sdk/meow_ui_anim.c ../sdk/meow_ui_box.c \
 *       ../sdk/meow_ui_media.c ../sdk/meow_pinyin.c -I../sdk -I. -DMEOW_UI_HOST_TEST -pthread
 *   ./test_lock_render
 * 全 PASS -> exit 0。
 */
#include <stdio.h>
#include <string.h>
#include "meow_ui.h"
#include "meow_ui_internal.h"   /* meow_ui_back_buf/pitch/bpp */

static int g_fail = 0;
#define CHECK(cond, msg) do { \
    if (cond) { printf("PASS %s\n", msg); } \
    else { g_fail++; printf("FAIL %s\n", msg); } \
} while (0)

int main(void)
{
    meow_ui_opts o = { 480, 720 };
    CHECK(meow_ui_init(&o) == 0, "sdk init 480x720");
    unsigned char *buf = meow_ui_back_buf();
    int pitch = meow_ui_back_buf_pitch();
    int bpp = meow_ui_back_buf_bpp();
    CHECK(buf != NULL && pitch > 0 && bpp >= 16, "back_buf present (pitch>0, bpp>=16)");
    int w = pitch / (bpp / 8);
    int h = 720;
    CHECK(w == 480 && h == 720, "framebuffer geometry 480x720");

    /* 「首帧全屏不透明底」：模拟 lk_draw 的 fill_rect(0,0,w,h,surface) —— 把整帧填一不透明色。 */
    unsigned short fill = 0x1111;   /* 不透明 RGB565（RGB565 无 alpha） */
    for (int y = 0; y < h; y++)
        for (int x = 0; x < w; x++)
            *(unsigned short *)(buf + (size_t)y * pitch + (size_t)x * 2) = fill;

    /* 断言每个像素都被覆写为不透明色（无残留 App 帧透出）。整帧覆盖 = 首帧全不透明。 */
    int covered = 1;
    for (int y = 0; y < h && covered; y++)
        for (int x = 0; x < w; x++) {
            unsigned short px = *(unsigned short *)(buf + (size_t)y * pitch + (size_t)x * 2);
            if (px != fill) { covered = 0; break; }
        }
    CHECK(covered, "first-frame full-fill covers every pixel (opaque)");

    /* 局部部分填充的对照：只画一半区域 → 另一半应保持（模拟漏画区透出 App 帧的旧缺陷）。 */
    memset(buf, 0, (size_t)pitch * h);            /* 先清空（模拟 App 帧残留） */
    for (int y = 0; y < h / 2; y++)
        for (int x = 0; x < w; x++)
            *(unsigned short *)(buf + (size_t)y * pitch + (size_t)x * 2) = fill;
    int top_covered = 1, bottom_left_blank = 0;
    for (int y = 0; y < h / 2; y++)
        for (int x = 0; x < w; x++)
            if (*(unsigned short *)(buf + (size_t)y * pitch + (size_t)x * 2) != fill) top_covered = 0;
    if (*(unsigned short *)(buf + (size_t)(h - 1) * pitch) == 0) bottom_left_blank = 1;
    CHECK(top_covered, "partial fill covers top half");
    CHECK(bottom_left_blank, "partial fill leaves bottom half blank (would show App frame)");

    printf("%s\n", g_fail ? "SOME TESTS FAILED" : "ALL PASS");
    return g_fail ? 1 : 0;
}