internal_linkage void SDLHandleEvent(State* state, SDL_Event* event)
{
switch(event->type)
{
case SDL_WINDOWEVENT:
{
switch(event->window.event)
{
// RESIZED event only fires if the user initiated the resize
// this fires before RESIZED if even if caused by an API call
case SDL_WINDOWEVENT_SIZE_CHANGED:
{
SDLResizeTexture(
&(state->FrameBuffer),
state->renderer,
event->window.data1, // width
event->window.data2); // height
//SDLUpdateWindow(state);
}break;
default:break;
}
} break;
case SDL_QUIT:
{
state->running = false;
}break;
default:break;
}
}
int main(int /*argc*/, char* /*argv*/[])
{
printf("Platform: SDL\n");
State state;
ZERO(state);
if(SDL_Init(SDL_INIT_VIDEO) == 0)
{
state.window = SDL_CreateWindow(
"Game From Scratch", // title
SDL_WINDOWPOS_CENTERED, // x
SDL_WINDOWPOS_CENTERED, // y
640, 480, // width, height
SDL_WINDOW_RESIZABLE); // flags
if(state.window)
{
state.running = true;
state.renderer = SDL_CreateRenderer(
state.window, // window
-1, // driver, -1 for auto-detect
0); // flags
// needs renderer to be initialised
SDLResizeTexture(&(state.FrameBuffer), state.renderer, 640, 480);
if(state.renderer)
{
SDL_Event event;
int XOffset = 0;
int YOffset = 0;
while(state.running)
{
// wait for and handle one event
// between checks for whether the app should quit
while(SDL_PollEvent(&event))
{
SDLHandleEvent(&state, &event);
}
RenderGradient(&(state.FrameBuffer), XOffset, YOffset);
SDLUpdateWindow(&state);
XOffset += 1;
YOffset += 2;
}
}
else
{
// create renderer failed
FAIL();
}
}
else
{
// create window failed
FAIL();
}
}
else
{
// SDL init failed
FAIL();
}
#ifdef CLEANUP
// in reverse order to initialisation
if(state.FrameBuffer.memory) free(state.FrameBuffer.memory);
if(state.FrameBuffer.texture) SDL_DestroyTexture(state.FrameBuffer.texture);
if(state.renderer) SDL_DestroyRenderer(state.renderer);
if(state.window) SDL_DestroyWindow(state.window);
SDL_Quit();
#endif
return 0;
}
//******************************************************* MAIN *******************************
int main(int argc, char* argv[]){
//set up sdl
SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO);
SDL_Window *Window = SDL_CreateWindow("Handmade Hero",
SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
640, 480, SDL_WINDOW_RESIZABLE);
if(Window){
SDL_Renderer *Renderer = SDL_CreateRenderer(Window, -1, 0);
if(Renderer){
// VIDEO
sdl_offscreen_buffer Buffer = {}; // if non-initialized, declaring variables in a loop fails on SDLResizeTexture with a pointer error - im blaming the compiler
sdl_window_dimension Dimension = SDLGetWindowDimension(Window);
SDLResizeTexture(&Buffer, Renderer, Dimension.Width, Dimension.Height);
keystates Keys = {};
//AUDIO
sdl_sound_output sound_output = sdl_sound_outputH(48000);
//open audio
SDLInitAudio(sound_output.SamplesPerSecond, sound_output.SamplesPerSecond * sound_output.BytesPerSample / 60);
SDL_PauseAudio(0);
//BW: state area allocation
void *new_state_area = malloc(128*1024*1024);//need ~2 MB at least; give it 128 MiB -- 2MB for video; dont know audio
void *prev_state_area = malloc(1024);// should be sizeof(state0), or sizeof(biggest statetype) later
//apparently we didnt have enough memory, but only crashed sometimes? this fixed it
void *state;
{
uint8 *next_ptr = (uint8*)prev_state_area;
anim_comp *animation = (anim_comp*)next_ptr;
next_ptr += sizeof(anim_comp);
init_anim_comp(animation, 0,0);
state0 *stateptr = (state0*)next_ptr;
printf("state0 size %ld\n", sizeof(state0));
uint64 stateptrn = (uint64)stateptr;
uint64 sizeptr = (uint64)&(stateptr->size);
uint64 deepc_ptr = (uint64)&(stateptr->deep_count);
uint64 anim_ptr = (uint64)&(stateptr->animation);
uint64 tsine_ptr = (uint64)&(stateptr->tSine);
uint64 tvol_ptr = (uint64)&(stateptr->ToneVolume);
uint64 thz_ptr = (uint64)&(stateptr->ToneHz);
uint64 pu_ptr = (uint64)&(stateptr->pitch_up_was_pressed);
printf("offset begin %lu\n", sizeptr - stateptrn);
printf("width of size %lu\n", deepc_ptr - sizeptr);
printf("width of deepc %lu\n", anim_ptr - deepc_ptr);
printf("width of animpt %lu\n", tsine_ptr - anim_ptr);
printf("width of tsine %lu\n", tvol_ptr - tsine_ptr);
printf("width of tvol %lu\n", thz_ptr - tvol_ptr);
printf("width of thz %lu\n", pu_ptr - thz_ptr);
next_ptr += sizeof(state0);
init_state0(stateptr, animation, 3000, 256, 0);
state = stateptr;
//return 0;
}
uint64 LastCounter = SDL_GetPerformanceCounter();
uint64 LastCycleCount = _rdtsc();
uint64 PerfCountFrequency = SDL_GetPerformanceFrequency();
bool running = true;
//main loop
printf("enter main event loop\n");
while(running){
///////NP_UPDATE/////////////
//event capturing
event_return events = eventHandler(&Keys);
if(events.shouldQuit) running = false;
//setup for p
state_window_info Wi = {}; Wi.Height = Buffer.Height; Wi.Width = Buffer.Width; Wi.Pitch = Buffer.Pitch;
int TargetQueueBytes = sound_output.LatencySampleCount * sound_output.BytesPerSample;
state_sound_info Si = {}; Si.BytesToGet = TargetQueueBytes - SDL_GetQueuedAudioSize(1); Si.BytesPerSample = sound_output.BytesPerSample; Si.SamplesPerSecond = sound_output.SamplesPerSecond;
uint64 state_size = 0;
uint64 vbuffer_size = Buffer.Height * Buffer.Pitch;
uint64 abuffer_size = Si.BytesToGet;
state_return next;
{ //in case(statetype) or similar
next = P_update_state0(*(state0*)state, new_state_area, Keys, Wi, Si);
//p should return state_size? and also, what statetype we are in -> later
state_size = sizeof(state0);
}
//GARBAGE COLLECTOR
//move this state to previous state
//fmemcpy(prev_state_area, new_state_area, state_size); //shallow copy, as supposed
//printf("hi\n");
deepcopy(prev_state_area, next.state, new_state_area, (uint8*)new_state_area + 128*1024*1024);
//TODO(md): DEEPCPY
//queue audio
if (Si.BytesToGet > 0) SDL_QueueAudio(1, next.abuffer, abuffer_size);
//render
SDLUpdateWindow(Window, Renderer, Buffer, next.vbuffer);
uint64 EndCycleCount = _rdtsc();
uint64 EndCounter = SDL_GetPerformanceCounter();
uint64 CounterElapsed = EndCounter - LastCounter;
uint64 CyclesElapsed = EndCycleCount - LastCycleCount;
real64 MSPerFrame = (((1000.0f * (real64)CounterElapsed) / (real64)PerfCountFrequency));
real64 FPS = (real64)PerfCountFrequency / (real64)CounterElapsed;
real64 MCPF = ((real64)CyclesElapsed / (1000.0f * 1000.0f));
printf("%.02fms/f, %.02f/s, %.02fmc/f\n", MSPerFrame, FPS, MCPF);
LastCycleCount = EndCycleCount;
LastCounter = EndCounter;
}
} } //if(Renderer, Window)
SDL_Quit();
return 0;
}
