82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
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#define INPUT_FRAME_STRING_LENGTH 32
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struct Input_Frame
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{
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Platform_Key_Flags key_flags[KeyCode_Count];
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char string_input[INPUT_FRAME_STRING_LENGTH];
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u32 string_input_len;
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v2 mouse_pos;
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s32 mouse_scroll;
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};
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struct Input_State
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{
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Input_Frame frames[2];
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Input_Frame* frame_hot;
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Input_Frame* frame_cold;
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// cross frame state tracking
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v2 mouse_pos_delta;
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v2 mouse_pos_down;
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};
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#define key_was_down(key_flags) has_flag((key_flags), KeyFlag_State_WasDown)
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#define key_is_down(key_flags) has_flag((key_flags), KeyFlag_State_IsDown)
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#define key_was_up(key_flags) (!has_flag((key_flags), KeyFlag_State_WasDown)
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#define key_is_up(key_flags) (!has_flag((key_flags), KeyFlag_State_IsDown)
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internal Input_State
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input_state_create()
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{
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Input_State result = {};
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result.frame_hot = result.frames + 0;
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result.frame_cold = result.frames + 1;
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return result;
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}
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internal void
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input_state_swap_frames(Input_State* input_state)
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{
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Input_Frame* next_hot = input_state->frame_cold;
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input_state->frame_cold = input_state->frame_hot;
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input_state->frame_hot = next_hot;
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// Clear the new hot input frame
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Platform_Key_Flags* hot_key_flags = input_state->frame_hot->key_flags;
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Platform_Key_Flags* cold_key_flags = input_state->frame_cold->key_flags;
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for (u32 i = 0; i < KeyCode_Count; i++) hot_key_flags[i] = cold_key_flags[i];
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input_state->frame_hot->string_input_len = 0;
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}
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// Key State Queries
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internal bool
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input_key_is_down(Input_State* input_state, Platform_Key_Code key)
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{
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Platform_Key_Flags flags = input_state->frame_hot->key_flags[key];
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return key_is_down(flags);
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}
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internal bool
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input_key_went_down(Input_State* input_state, Platform_Key_Code key)
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{
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Platform_Key_Flags flags = input_state->frame_hot->key_flags[key];
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return key_is_down(flags) && !key_was_down(flags);
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}
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internal bool
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input_key_is_up(Input_State* input_state, Platform_Key_Code key)
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{
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Platform_Key_Flags flags = input_state->frame_hot->key_flags[key];
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return !key_is_down(flags);
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}
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internal bool
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input_key_went_up(Input_State* input_state, Platform_Key_Code key)
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{
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Platform_Key_Flags flags = input_state->frame_hot->key_flags[key];
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return !key_is_down(flags) && key_was_down(flags);
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}
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