123 lines
2.0 KiB
C
123 lines
2.0 KiB
C
#pragma once
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#include <SDL3/SDL.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#define WINDOW_NAME_MAX_LENGTH 128
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#define TARGET_FRAME 1.0 / 60.0
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#define FONT_ROWS 7
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#define FONT_COLS 5
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typedef struct {
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char window_name[WINDOW_NAME_MAX_LENGTH];
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uint16_t width, height;
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SDL_Window *window;
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SDL_Renderer *renderer;
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SDL_Texture *texture;
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} engine_sdl_state_t;
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typedef struct {
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/**
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* this function runs inside of the SDL_PollEvent loop
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* useful for user input, quitting the program and so on
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*/
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void (*engine_poll_events)(void);
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/**
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* meant as the "area" for manupulating the framebuffer;
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* after this is executed, the contents of
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* game_state->framebuffer get drawn
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*/
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void (*engine_update_framebuffer)(void);
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engine_sdl_state_t *sdl_state;
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} engine_internal_state_t;
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typedef struct {
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SDL_Event event;
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bool is_running;
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bool framebuffer_dirty;
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SDL_Rect dirty_rect;
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uint16_t width, height;
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uint32_t *framebuffer;
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} game_state_t;
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extern engine_internal_state_t *internal_state;
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extern game_state_t *game_state;
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engine_sdl_state_t*
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engine_sdl_init(
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uint32_t window_width,
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uint32_t window_height,
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const char window_name[]
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);
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void
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engine_sdl_destroy(
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engine_sdl_state_t *state
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);
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bool
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engine_init(
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uint32_t window_width,
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uint32_t window_height,
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const char window_name[],
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void (*engine_poll_events)(void),
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void (*engine_update_framebuffer)(void)
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);
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void
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engine_start();
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void
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engine_stop();
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void
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put_pixel(
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unsigned int x,
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unsigned int y,
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uint32_t color
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);
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void
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put_rect(
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uint32_t x,
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uint32_t y,
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uint32_t w,
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uint32_t h,
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uint32_t color
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);
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void
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clear_framebuffer(
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uint32_t color
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);
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void
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clear_rect(int x, int y, int w, int h, uint32_t color);
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void
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mark_dirty_rect(int x, int y, int w, int h);
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void
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put_char(
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char c,
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uint32_t x,
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uint32_t y,
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uint32_t size,
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uint32_t fg_color,
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uint32_t bg_color
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);
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void
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put_string(
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const char *text,
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uint32_t x,
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uint32_t y,
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uint32_t size,
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uint32_t spacing,
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uint32_t line_spacing,
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uint32_t fg_color,
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uint32_t bg_color
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); |