39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
#pragma once
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#include "wm_event.h"
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#include "wm_plan.h"
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typedef struct wm_backend_t wm_backend_t;
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typedef enum wm_backend_next_result_t {
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// 成功产出一个 runtime 输入事件，out 有效
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WM_BACKEND_NEXT_EVENT,
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// backend 请求 runtime 正常停止（例如连接关闭）
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WM_BACKEND_NEXT_STOP,
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// backend 检测到必须重建 bootstrap 的平台变化（例如显示器配置变化）
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WM_BACKEND_NEXT_RESTART_REQUIRED,
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// backend 遇到无法恢复的错误
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WM_BACKEND_NEXT_ERROR,
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} wm_backend_next_result_t;
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typedef struct wm_backend_api_t {
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bool (*init)(wm_backend_t *backend);
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/*
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* 返回一个 backend 轮询结果。
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* 只有返回 WM_BACKEND_NEXT_EVENT 时，out 才包含一个完整的 runtime 输入事件。
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*/
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wm_backend_next_result_t (*next_event)(wm_backend_t *backend, wm_event_t *out);
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/*
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* Runtime filters out service-side effects such as WM_EFFECT_RENDER_OUTPUT.
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* Backends only receive platform effects here.
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*/
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bool (*apply_effect)(wm_backend_t *backend, const wm_effect_t *effect);
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void (*flush)(wm_backend_t *backend);
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void (*shutdown)(wm_backend_t *backend);
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} wm_backend_api_t;
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struct wm_backend_t {
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const wm_backend_api_t *api;
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void *impl;
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};
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