HandmadeHero/project/engine/engine.hpp
2023-09-28 13:52:47 -04:00

221 lines
3.4 KiB
C++

/*
Services the engine provides to the platform layer
*/
#pragma once
#include "platform/platform.hpp"
#define NS_ENGINE_BEGIN namespace engine {
#define NS_ENGINE_END }
NS_ENGINE_BEGIN
struct Clocks
{
// TODO(Ed) : Clock values...
f32 SecondsElapsed;
};
struct Memory
{
// All memory for the engine is required to be zero initialized.
// Wiped on shutdown
void* Persistent;
u64 PersistentSize;
// Wiped on a per-frame basis
// void* Frame;
// u64 FrameSize;
// Wiped whenever the engine wants to?
void* Transient;
u64 TransientSize;
};
struct OffscreenBuffer
{
void* Memory; // Lets use directly mess with the "pixel's memory buffer"
u32 Width;
u32 Height;
u32 Pitch;
u32 BytesPerPixel;
};
// TODO : Will be gutting this once we have other stuff lifted.
struct AudioBuffer
{
s16* Samples;
u32 RunningSampleIndex;
s32 SamplesPerSecond;
s32 NumSamples;
};
struct DigitalBtn
{
s32 HalfTransitions;
b32 EndedDown;
};
struct AnalogAxis
{
f32 Start;
f32 End;
f32 Min;
f32 Max;
// Platform doesn't provide this, we process in the engine layer.
f32 Average;
};
struct AnalogStick
{
AnalogAxis X;
AnalogAxis Y;
};
union KeyboardState
{
DigitalBtn Keys[12];
struct {
DigitalBtn Row_1;
DigitalBtn Q;
DigitalBtn E;
DigitalBtn W;
DigitalBtn A;
DigitalBtn S;
DigitalBtn D;
DigitalBtn L;
DigitalBtn Escape;
DigitalBtn Backspace;
DigitalBtn Up;
DigitalBtn Down;
DigitalBtn Left;
DigitalBtn Right;
DigitalBtn Space;
DigitalBtn Pause;
};
};
struct MousesState
{
DigitalBtn Left;
DigitalBtn Middle;
DigitalBtn Right;
};
struct XInputPadState
{
struct
{
AnalogStick Left;
AnalogStick Right;
} Stick;
AnalogAxis LeftTrigger;
AnalogAxis RightTrigger;
union {
DigitalBtn Btns[14];
struct {
struct {
DigitalBtn Up;
DigitalBtn Down;
DigitalBtn Left;
DigitalBtn Right;
} DPad;
DigitalBtn A;
DigitalBtn B;
DigitalBtn X;
DigitalBtn Y;
DigitalBtn Back;
DigitalBtn Start;
DigitalBtn LeftShoulder;
DigitalBtn RightShoulder;
};
};
};
struct DualsensePadState
{
struct
{
AnalogStick Left;
AnalogStick Right;
} Stick;
AnalogAxis L2;
AnalogAxis R2;
union {
DigitalBtn Btns[14];
struct {
struct {
DigitalBtn Up;
DigitalBtn Down;
DigitalBtn Left;
DigitalBtn Right;
} DPad;
DigitalBtn X;
DigitalBtn Circle;
DigitalBtn Square;
DigitalBtn Triangle;
DigitalBtn Share;
DigitalBtn Options;
DigitalBtn L1;
DigitalBtn R1;
};
};
};
struct ControllerState
{
KeyboardState* Keyboard;
MousesState* Mouse;
XInputPadState* XPad;
DualsensePadState* DSPad;
};
struct ControllerStateSnapshot
{
KeyboardState Keyboard;
MousesState Mouse;
XInputPadState XPad;
DualsensePadState DSPad;
};
struct InputState
{
ControllerState Controllers[4];
};
struct InputStateSnapshot
{
ControllerStateSnapshot Controllers[4];
};
using InputBindCallback = void( void* );
using InputBindCallback_DigitalBtn = void( engine::DigitalBtn* Button );
using InputBindCallback_AnalogAxis = void( engine::AnalogAxis* Axis );
using InputBindCallback_AnalogStick = void( engine::AnalogStick* Stick );
struct InputMode
{
InputBindCallback* Binds;
s32 NumBinds;
};
void input_mode_pop( InputMode* mode );
void input_mode_pop( InputMode* mode );
#if 0
struct RecordedInput
{
s32 Num;
InputState* Stream;
};
#endif
NS_ENGINE_END