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#include "config.h"
#include "mandel.h"
bool state_init(State *state)
{
SDL_CALL(SDL_Init(SDL_INIT_VIDEO));
SDL_CALL(state->window = SDL_CreateWindow(
MANDEL_WINDOW_TITLE,
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
MANDEL_WINDOW_WIDTH,
MANDEL_WINDOW_HEIGHT,
SDL_WINDOW_RESIZABLE
));
SDL_CALL(state->renderer = SDL_CreateRenderer(state->window, -1, 0));
SDL_CALL(state->texture = SDL_CreateTexture(
state->renderer,
SDL_PIXELFORMAT_RGB888,
SDL_TEXTUREACCESS_STREAMING,
MANDEL_WINDOW_WIDTH,
MANDEL_WINDOW_HEIGHT
));
state->palette = color_palette_new(NULL, MANDEL_ITERATIONS);
if (state->palette == NULL)
return false;
state->iterations = MANDEL_ITERATIONS;
state->real_start = -2.0;
state->real_end = 2.0;
state->imag_start = -2.0;
state->imag_end = 2.0;
state->running = true;
return true;
}
void state_run(State *state)
{
while (state->running)
{
event_handle(state);
double real_step;
double imag_step;
double real;
double imag;
void *pixels;
int pitch;
int width;
int height;
SDL_CALL(SDL_LockTexture(state->texture, NULL, &pixels, &pitch));
SDL_CALL(SDL_QueryTexture(state->texture, NULL, NULL, &width, &height));
real_step = (state->real_end - state->real_start) / width;
imag_step = (state->imag_end - state->imag_start) / height;
imag = state->imag_start;
uint32_t render_start_time = SDL_GetTicks();
for (int i = 0; i < height; i++)
{
real = state->real_start;
for (int j = 0; j < width; j++)
{
int n = mandelbrot(real, imag, state->iterations);
Color c = state->palette[n];
((Color*)pixels)[i * width + j] = c;
real += real_step;
}
imag += imag_step;
}
uint32_t render_end_time = SDL_GetTicks();
printf("%ums\r", (render_end_time - render_start_time));
fflush(stdout);
SDL_UnlockTexture(state->texture);
SDL_CALL(SDL_RenderCopy(state->renderer, state->texture, NULL, NULL));
SDL_RenderPresent(state->renderer);
SDL_Delay(3);
}
}
void state_quit(State *state)
{
free(state->palette);
SDL_DestroyTexture(state->texture);
SDL_DestroyRenderer(state->renderer);
SDL_DestroyWindow(state->window);
SDL_Quit();
}
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