diff options
Diffstat (limited to 'platform.c')
| -rw-r--r-- | platform.c | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/platform.c b/platform.c new file mode 100644 index 0000000..3cb457a --- /dev/null +++ b/platform.c @@ -0,0 +1,391 @@ +#include "config.h" +#include "render.h" +#include "input.h" + +#if defined(plat_posix) +#define _POSIX_SOURCE + +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <stdarg.h> + +void platform_log(const char* message, ...) { + va_list args; + va_start(args, message); + vfprintf(stdout, message, args); + va_end(args); +} + +void platform_err(const char* message, ...) { + va_list args; + va_start(args, message); + + if (isatty(fileno(stderr))) { + fprintf(stderr, "\033[31;31m"); + } + + vfprintf(stderr, message, args); + + if (isatty(fileno(stderr))) { + fprintf(stderr, "\033[0m"); + } + + va_end(args); +} + +void platform_abort(int code) { +#if defined(DEBUG) && defined(plat_x86) + __asm__("int3;"); +#else + exit(code); +#endif +} +#endif + +#if defined(plat_sdl2) + +#define max_joysticks 16 + +#include <SDL2/SDL.h> +#include <stdio.h> +#include <string.h> + +extern void on_init(int argc, char** argv); +extern void on_update(); +extern void on_deinit(); + +int held_btns[btn_count]; +int pressed_btns[btn_count]; +int released_btns[btn_count]; +int app_running = 1; + +int texture_w = default_window_w, texture_h = default_window_h; + +int button_pressed(Button btn) { + return held_btns[btn]; +} + +int button_just_pressed(Button btn) { + return pressed_btns[btn]; +} + +int button_just_released(Button btn) { + return released_btns[btn]; +} + +Button sdl_to_btn(const SDL_Event* event) { + switch (event->key.keysym.sym) { + case SDLK_z: + case SDLK_RETURN: + return btn_jump; + case SDLK_x: + return btn_shoot; + case SDLK_LEFT: + case SDLK_h: + return btn_dpad_left; + case SDLK_RIGHT: + case SDLK_l: + return btn_dpad_right; + case SDLK_UP: + case SDLK_k: + return btn_dpad_up; + case SDLK_DOWN: + case SDLK_j: + return btn_dpad_down; + case SDLK_ESCAPE: + return btn_pause; + case SDLK_F12: + return btn_edit; + case SDLK_s: + return btn_save_level; + default: return btn_unknown; + } +} + +Button joy_btn_to_btn(int button) { + switch (button) { + case 0: + return btn_jump; + case 2: + return btn_shoot; + case 7: + return btn_pause; + default: return btn_unknown; + } +} + +void reset_dpad() { + int i; + + for ( + i = btn_dpad_left; + i <= btn_dpad_down; + i++ + ) { + if (held_btns[i]) { + held_btns[i] = 0; + released_btns[i] = 1; + } + } +} + +void update_dpad(Button btn) { + reset_dpad(); + + held_btns[btn] = 1; + pressed_btns[btn] = 1; +} + +int audio_len, audio_pos; +int ticker; + +void fill_audio(void *udata, Uint8 *stream, int len) { + /*if (audio_len == 0) { + audio_len = 1024; + audio_pos = 0; + } + + len = (len > audio_len ? audio_len : len); + + sound_sys.mix(((unsigned short*)stream), len); + + audio_pos += len; + audio_len -= len;*/ +} + +void reset_input() { + int i; + + for (i = 0; i < btn_count; i++) { + pressed_btns[i] = 0; + released_btns[i] = 0; + } +} + +void platform_quit() { + app_running = 0; +} + +int main(int argc, char** argv) { + SDL_Window* window; + SDL_Renderer* renderer; + SDL_Texture* backbuffer; + void* bb_pixels; + SDL_Event event; + SDL_Rect src_rect, dst_rect; +#if !no_sound + SDL_AudioSpec aud_spec; +#endif + Button button; + int ww, wh, bb_pitch, ntw, nth; + int to_sleep, begin_time, end_time; + SDL_Joystick* joysticks[max_joysticks]; + + audio_pos = 0; + audio_len = 1024; + ticker = 0; + + SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK); + + SDL_CreateWindowAndRenderer( + default_window_w, + default_window_h, + SDL_WINDOW_RESIZABLE, + &window, + &renderer + ); + + SDL_SetWindowTitle(window, game_name); + +#if !no_sound + aud_spec.freq = 22050; + aud_spec.format = AUDIO_U16; + aud_spec.channels = 1; + aud_spec.samples = 1024; + aud_spec.callback = fill_audio; + aud_spec.userdata = 0; + + if (SDL_OpenAudio(&aud_spec, 0) < 0) { + fprintf( + stderr, + "Sound error: %s.\n", + SDL_GetError() + ); + } + SDL_PauseAudio(0); +#endif + + on_init(argc, argv); + + backbuffer = SDL_CreateTexture( + renderer, + SDL_PIXELFORMAT_ABGR8888, + SDL_TEXTUREACCESS_STREAMING, + renderer_w, + renderer_h + ); + + while (app_running) { + begin_time = SDL_GetTicks(); + + reset_input(); + + while (SDL_PollEvent(&event)) { + switch (event.type) { + case SDL_QUIT: + app_running = 0; + break; + case SDL_KEYDOWN: + button = sdl_to_btn(&event); + held_btns[(int)button] = 1; + pressed_btns[(int)button] = 1; + break; + case SDL_KEYUP: + button = sdl_to_btn(&event); + held_btns[(int)button] = 0; + released_btns[(int)button] = 1; + break; + case SDL_JOYDEVICEADDED: + joysticks[event.jdevice.which] = + SDL_JoystickOpen(event.jdevice.which); + break; + case SDL_JOYDEVICEREMOVED: + SDL_JoystickClose(joysticks[event.jdevice.which]); + break; + case SDL_JOYHATMOTION: + switch (event.jhat.value) { + case SDL_HAT_LEFT: + update_dpad(btn_dpad_left); + break; + case SDL_HAT_UP: + update_dpad(btn_dpad_up); + break; + case SDL_HAT_RIGHT: + update_dpad(btn_dpad_right); + break; + case SDL_HAT_DOWN: + update_dpad(btn_dpad_down); + break; + case SDL_HAT_CENTERED: + reset_dpad(); + default: + break; + } + break; + case SDL_JOYBUTTONDOWN: + button = joy_btn_to_btn(event.jbutton.button); + held_btns[(int)button] = 1; + pressed_btns[(int)button] = 1; + break; + case SDL_JOYBUTTONUP: + button = joy_btn_to_btn(event.jbutton.button); + held_btns[(int)button] = 0; + released_btns[(int)button] = 1; + break; + case SDL_WINDOWEVENT: + switch (event.window.event) { + case SDL_WINDOWEVENT_RESIZED: + ntw = renderer_w; + nth = renderer_h; + texture_w = ntw; + texture_h = nth; + + /* This is kinda shit lmao. */ + while (1) { + ntw *= 2; + nth *= 2; + + if ( + ntw > event.window.data1 || + nth > event.window.data2 + ) { + break; + } + + texture_w = ntw; + texture_h = nth; + } + + break; + } + default: + break; + } + } + + on_update(); + + SDL_GetWindowSize(window, &ww, &wh); + + src_rect.x = 0; + src_rect.y = 0; + src_rect.w = renderer_w; + src_rect.h = renderer_h; + + src_rect.x = 0; + src_rect.y = 0; + src_rect.w = renderer_w; + src_rect.h = renderer_h; + + dst_rect.x = ww / 2 - texture_w / 2; + dst_rect.y = wh / 2 - texture_h / 2; + dst_rect.w = texture_w; + dst_rect.h = texture_h; + + SDL_LockTexture( + backbuffer, + 0, + &bb_pixels, + &bb_pitch + ); + + memcpy(bb_pixels, + get_render_pixels(), + renderer_w * renderer_h * sizeof(Colour) + ); + + SDL_UnlockTexture(backbuffer); + + SDL_UpdateTexture( + backbuffer, + 0, + get_render_pixels(), + renderer_w * sizeof(Colour) + ); + + SDL_RenderClear(renderer); + SDL_RenderCopy( + renderer, + backbuffer, + &src_rect, + &dst_rect + ); + SDL_RenderPresent(renderer); + + end_time = SDL_GetTicks(); + + to_sleep = 20 - ((end_time - begin_time)); + if (to_sleep > 0) { + SDL_Delay(to_sleep); + } + } + + on_deinit(); + + SDL_DestroyTexture(backbuffer); + SDL_DestroyRenderer(renderer); + SDL_DestroyWindow(window); + +#if !no_sound + SDL_CloseAudio(); +#endif + + SDL_Quit(); + + return 0; +} + +#else +#define No platform defined. +#endif |