mirror of
https://github.com/Ed94/HandmadeHero.git
synced 2024-11-10 03:44:53 -08:00
284 lines
7.0 KiB
C++
284 lines
7.0 KiB
C++
#include "engine.hpp"
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//#include "win32.h"
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NS_ENGINE_BEGIN
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struct EngineState
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{
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s32 WavePeriod;
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s32 WaveToneHz;
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s32 ToneVolume;
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s32 XOffset;
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s32 YOffset;
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};
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using GetSoundSampleValueFn = s16( EngineState* state, SoundBuffer* sound_buffer );
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internal s16
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square_wave_sample_value( EngineState* state, SoundBuffer* sound_buffer )
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{
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s32 sample_value = (sound_buffer->RunningSampleIndex / (state->WavePeriod / 2) ) % 2 ?
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state->ToneVolume : - state->ToneVolume;
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return scast(s16, sample_value);
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}
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internal s16
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sine_wave_sample_value( EngineState* state, SoundBuffer* sound_buffer )
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{
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local_persist f32 time = 0.f;
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// time = TAU * (f32)sound_buffer->RunningSampleIndex / (f32)SoundTest_WavePeriod;
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f32 sine_value = sinf( time );
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s16 sample_value = scast(s16, sine_value * scast(f32, state->ToneVolume));
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time += TAU * 1.0f / scast(f32, state->WavePeriod );
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return sample_value;
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}
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internal void
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output_sound( EngineState* state, SoundBuffer* sound_buffer, GetSoundSampleValueFn* get_sample_value )
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{
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s16* sample_out = sound_buffer->Samples;
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for ( s32 sample_index = 0; sample_index < sound_buffer->NumSamples; ++ sample_index )
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{
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s16 sample_value = get_sample_value( state, sound_buffer );
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sound_buffer->RunningSampleIndex++;
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// char ms_timing_debug[256] {};
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// wsprintfA( ms_timing_debug, "sample_value: %d\n", sample_value );
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// OutputDebugStringA( ms_timing_debug );
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*sample_out = sample_value;
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++ sample_out;
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*sample_out = sample_value;
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++ sample_out;
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}
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}
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internal void
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render_weird_graident(OffscreenBuffer* buffer, u32 x_offset, u32 y_offset )
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{
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// TODO(Ed): See if with optimizer if buffer should be passed by value.
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struct Pixel {
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u8 Blue;
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u8 Green;
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u8 Red;
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u8 Alpha;
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};
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u8* row = rcast( u8*, buffer->Memory);
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local_persist float wildcard = 0;
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for ( u32 y = 0; y < buffer->Height; ++ y )
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{
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// u8* pixel = rcast(u8*, row);
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// Pixel* pixel = rcast( Pixel*, row );
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u32* pixel = rcast(u32*, row);
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for ( u32 x = 0; x < buffer->Width; ++ x )
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{
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/* Pixel in memory:
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-----------------------------------------------
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Pixel + 0 Pixel + 1 Pixel + 2 Pixel + 3
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RR GG GG XX
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-----------------------------------------------
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x86-64 : Little Endian Arch
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0x XX BB GG RR
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*/
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#if 0
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u8 blue = scast(u8, x + x_offset * u8(wildcard) % 256);
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u8 green = scast(u8, y + y_offset - u8(wildcard) % 128);
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u8 red = scast(u8, wildcard) % 256 - x * 0.4f;
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#else
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u8 blue = scast(u8, x + x_offset);
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u8 green = scast(u8, y + y_offset);
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u8 red = 0;
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#endif
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*pixel++ = u32(red << 16) | u32(green << 8) | blue;
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}
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wildcard += 0.5375f;
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row += buffer->Pitch;
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}
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}
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b32 input_using_analog()
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{
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return false;
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}
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void startup()
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{
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}
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void shutdown()
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{
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}
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// TODO : I rather expose the back_buffer and sound_buffer using getters for access in any function.
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void update_and_render( InputState* input, OffscreenBuffer* back_buffer, SoundBuffer* sound_buffer, Memory* memory )
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{
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// Graphics & Input Test
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local_persist u32 x_offset = 0;
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local_persist u32 y_offset = 0;
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// Wave Sound Test
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local_persist bool wave_switch = false;
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#if 0
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if ( input_using_analog() )
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{
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// TODO(Ed) : Use analog movement tuning
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}
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else
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{
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// TODO(Ed) : Use digital movement tuning
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}
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#endif
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EngineState* state = rcast( EngineState*, memory->Persistent );
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do_once_start
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assert( sizeof(EngineState) <= memory->PersistentSize );
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state->ToneVolume = 1000;
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state->WaveToneHz = 120;
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state->WavePeriod = sound_buffer->SamplesPerSecond / state->WaveToneHz;
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state->XOffset = 0;
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state->YOffset = 0;
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#if Build_Debug && 0
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{
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using namespace platform;
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char const* file_path = __FILE__;
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Debug_FileContent file_content = debug_file_read_content( file_path );
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if ( file_content.Size )
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{
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debug_file_write_content( "test.out", file_content.Size, file_content.Data );
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debug_file_free_content( & file_content );
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}
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}
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#endif
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do_once_end
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ControllerState* controller = & input->Controllers[0];
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// Abstracting the actionables as booleans and processing within this scope
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// for now until proper callbacks for input bindings are setup.
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b32 move_up = false;
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b32 move_down = false;
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b32 move_left = false;
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b32 move_right = false;
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b32 action_up = false;
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b32 action_down = false;
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b32 action_left = false;
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b32 action_right = false;
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b32 raise_volume = false;
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b32 lower_volume = false;
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b32 raise_tone_hz = false;
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b32 lower_tone_hz = false;
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b32 toggle_wave_tone = false;
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f32 analog_threshold = 0.5f;
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if ( controller->DSPad )
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{
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DualsensePadState* pad = controller->DSPad;
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move_right |= pad->DPad.Right.EndedDown || pad->Stick.Left.X.End > analog_threshold;
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move_left |= pad->DPad.Left.EndedDown || pad->Stick.Left.X.End < -analog_threshold;
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move_up |= pad->DPad.Up.EndedDown || pad->Stick.Left.Y.End > analog_threshold;
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move_down |= pad->DPad.Down.EndedDown || pad->Stick.Left.Y.End < -analog_threshold;
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raise_volume |= pad->Triangle.EndedDown;
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lower_volume |= pad->Circle.EndedDown;
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raise_tone_hz |= pad->Square.EndedDown;
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lower_tone_hz |= pad->X.EndedDown;
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toggle_wave_tone |= pad->Options.EndedDown;
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}
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if ( controller->XPad )
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{
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XInputPadState* pad = controller->XPad;
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move_right |= pad->DPad.Right.EndedDown || pad->Stick.Left.X.End > analog_threshold;
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move_left |= pad->DPad.Left.EndedDown || pad->Stick.Left.X.End < -analog_threshold;
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move_up |= pad->DPad.Up.EndedDown || pad->Stick.Left.Y.End > analog_threshold;
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move_down |= pad->DPad.Down.EndedDown || pad->Stick.Left.Y.End < -analog_threshold;
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raise_volume |= pad->Y.EndedDown;
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lower_volume |= pad->B.EndedDown;
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raise_tone_hz |= pad->X.EndedDown;
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lower_tone_hz |= pad->A.EndedDown;
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toggle_wave_tone |= pad->Start.EndedDown;
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}
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if ( controller->Keyboard )
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{
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KeyboardState* keyboard = controller->Keyboard;
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move_right |= keyboard->D.EndedDown;
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move_left |= keyboard->A.EndedDown;
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move_up |= keyboard->W.EndedDown;
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move_down |= keyboard->S.EndedDown;
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raise_volume |= keyboard->Up.EndedDown;
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lower_volume |= keyboard->Down.EndedDown;
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raise_tone_hz |= keyboard->Right.EndedDown;
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lower_tone_hz |= keyboard->Left.EndedDown;
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toggle_wave_tone |= keyboard->Space.EndedDown;
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}
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x_offset += 3 * move_right;
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x_offset -= 3 * move_left;
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y_offset += 3 * move_down;
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y_offset -= 3 * move_up;
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if ( raise_volume )
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{
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state->ToneVolume += 10;
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}
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if ( lower_volume )
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{
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state->ToneVolume -= 10;
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}
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if ( raise_tone_hz )
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{
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state->WaveToneHz += 1;
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state->WavePeriod = sound_buffer->SamplesPerSecond / state->WaveToneHz;
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}
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if ( lower_tone_hz )
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{
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state->WaveToneHz -= 1;
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state->WavePeriod = sound_buffer->SamplesPerSecond / state->WaveToneHz;
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}
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if ( toggle_wave_tone )
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{
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wave_switch ^= true;
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}
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// TODO(Ed) : Allow sample offsets here for more robust platform options
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if ( ! wave_switch )
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output_sound( state, sound_buffer, sine_wave_sample_value );
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else
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output_sound( state, sound_buffer, square_wave_sample_value );
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render_weird_graident( back_buffer, x_offset, y_offset );
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}
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NS_ENGINE_END
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