diff options
Diffstat (limited to 'graphics.c')
| -rw-r--r-- | graphics.c | 79 |
1 files changed, 56 insertions, 23 deletions
@@ -1,4 +1,5 @@ #include <stdbool.h> +#include <pthread.h> #include <SDL2/SDL.h> #include "header.h" @@ -19,9 +20,14 @@ #define SET_DRAW_COLOR(renderer, c) ( \ SDL_SetRenderDrawColor(renderer, c.rgb.r, c.rgb.g, c.rgb.b, SDL_ALPHA_OPAQUE)); +#define RED_MASK 0x0000ff +#define GREEN_MASK 0x00ff00 +#define BLUE_MASK 0xff0000 +#define PITCH(ch, width) (ch * width) + static void update(GState *state); static void event_handler(GState *state); -/* static Color *create_palette(Color start, Color end); */ +static Color *create_palette(Color start, Color end); /* static void move_center(GState *state, int motion_x, int motion_y); */ static void recenter(GState *state, int x, int y); static void recenter_x(GState *state, int x); @@ -53,6 +59,12 @@ GState *graphics_init(Config *config) state->palette = create_palette(start, end); if (state->palette == NULL) error_exit_state(state, "unable to create color palette"); + state->canvas = SDL_CreateTexture( + state->renderer, SDL_PIXELFORMAT_RGBA8888, + SDL_TEXTUREACCESS_TARGET, config->window_w, config->window_h + ); + if (state->canvas == NULL) + error_exit_state(state, "unable to create canvas texture"); state->running = true; state->window_w = config->window_w; state->window_h = config->window_h; @@ -62,6 +74,7 @@ GState *graphics_init(Config *config) state->center.y = config->center_y; state->in_set_color.hexcode = IN_SET_COLOR; state->moving = false; + state->changed = true; return state; } @@ -76,35 +89,52 @@ void graphics_run(GState *state) while (state->running) { event_handler(state); - update(state); + if (state->changed) + { + update(state); + state->changed = false; + } SDL_Delay(REFRESH_RATE); } } static void update(GState *state) { - double a, b; - Color color; - SET_DRAW_COLOR(state->renderer, state->in_set_color); - SDL_RenderClear(state->renderer); - for (int x = 0; x < state->window_w; x++) + void *pixels = mandelbrot_pixels(REAL_LO(state), REAL_HI(state), + IMAG_LO(state), IMAG_HI(state), + state->window_w, state->window_h, state->palette); + if (pixels == NULL) + error_exit_state(state, "unable to create pixels"); + SDL_Surface *surface = SDL_CreateRGBSurfaceFrom( + pixels, state->window_w, state->window_h, + PIXELS_DEPTH, PITCH(PIXELS_CHANELS, state->window_w), + RED_MASK, BLUE_MASK, GREEN_MASK, 0 + ); + if (surface == NULL) { - for (int y = 0; y < state->window_h; y++) - { - a = map_range((double)x, 0, state->window_w, REAL_LO(state), REAL_HI(state)); - b = map_range((double)y, 0, state->window_h, IMAG_LO(state), IMAG_HI(state)); - int frac_steps = mandelbrot_in_set(a, b); - if (frac_steps == -1) - continue; - color = state->palette[frac_steps]; - /* color.rgb.r = 100 * frac_steps; */ - /* color.rgb.g = 100 * frac_steps; */ - /* color.rgb.b = 100 * frac_steps; */ - SET_DRAW_COLOR(state->renderer, color); - SDL_RenderDrawPoint(state->renderer, x, y); - } + free(pixels); + error_exit_state(state, "unable to create pixels surface"); + } + SDL_Texture *texture = SDL_CreateTextureFromSurface(state->renderer, surface); + free(pixels); + SDL_FreeSurface(surface); + if (texture == NULL) + error_exit_state(state, "unable to create texture"); + SDL_Rect frame; + if (SDL_QueryTexture(texture, NULL, NULL, &frame.w, &frame.h) != 0) + { + SDL_DestroyTexture(texture); + error_exit_state(state, "unable to load texture"); + } + frame.x = 0; + frame.y = 0; + if (SDL_RenderCopy(state->renderer, texture, NULL, &frame) != 0) + { + SDL_DestroyTexture(texture); + error_exit_state(state, "unable to render texture"); } SDL_RenderPresent(state->renderer); + SDL_DestroyTexture(texture); } static void event_handler(GState *state) @@ -177,16 +207,17 @@ static void event_handler(GState *state) /* printf("%f, %f\n", state->center.x, state->center.y); */ /* } */ } + state->changed = true; } } - Color *create_palette(Color start, Color end) + static Color *create_palette(Color start, Color end) { int red_step = abs(end.rgb.r - start.rgb.r) / MAX_ITERATION; int green_step = abs(end.rgb.g - start.rgb.g) / MAX_ITERATION; int blue_step = abs(end.rgb.b - start.rgb.b) / MAX_ITERATION; - Color *palette = (Color*)malloc(sizeof(Color) * MAX_ITERATION); + Color *palette = (Color*)malloc(sizeof(Color) * (MAX_ITERATION + 1)); if (palette == NULL) return NULL; for (int i = 0; i < MAX_ITERATION; i++) @@ -195,6 +226,7 @@ static void event_handler(GState *state) palette[i].rgb.g = i * green_step + start.rgb.g; palette[i].rgb.b = i * blue_step + start.rgb.b; } + palette[MAX_ITERATION].hexcode = 0x0; return palette; } @@ -246,6 +278,7 @@ static void destroy_state(GState *state) if (state == NULL) return; free(state->palette); + SDL_DestroyTexture(state->canvas); SDL_DestroyRenderer(state->renderer); SDL_DestroyWindow(state->window); free(state); |