/* u8x8_d_sdl_128x64.c */ #include "u8g2.h" #include "SDL.h" #include "SDL_video.h" #include #define HEIGHT (64) #define WIDTH 128 SDL_Surface *u8g_sdl_screen; int u8g_sdl_multiple = 2; Uint32 u8g_sdl_color[256]; void u8g_sdl_set_pixel(int x, int y, int idx) { Uint32 *ptr; Uint32 offset; int i, j; if ( y >= HEIGHT ) return; if ( y < 0 ) return; if ( x >= WIDTH ) return; if ( x < 0 ) return; for( i = 0; i < u8g_sdl_multiple; i++ ) for( j = 0; j < u8g_sdl_multiple; j++ ) { offset = (y * u8g_sdl_multiple + j) * u8g_sdl_screen->w * u8g_sdl_screen->format->BytesPerPixel + (x * u8g_sdl_multiple + i) * u8g_sdl_screen->format->BytesPerPixel; assert( offset < u8g_sdl_screen->w * u8g_sdl_screen->h * u8g_sdl_screen->format->BytesPerPixel ); ptr = u8g_sdl_screen->pixels + offset; *ptr = u8g_sdl_color[idx]; } } void u8g_sdl_set_8pixel(int x, int y, uint8_t pixel) { int cnt = 8; while( cnt > 0 ) { if ( (pixel & 1) == 0 ) { u8g_sdl_set_pixel(x,y,0); } else { u8g_sdl_set_pixel(x,y,3); } pixel >>= 1; y++; cnt--; } } void u8g_sdl_set_multiple_8pixel(int x, int y, int cnt, uint8_t *pixel) { uint8_t b; while( cnt > 0 ) { b = *pixel; u8g_sdl_set_8pixel(x, y, b); x++; pixel++; cnt--; } } #define W(x,w) (((x)*(w))/100) void u8g_sdl_init(void) { if (SDL_Init(SDL_INIT_VIDEO) != 0) { printf("Unable to initialize SDL: %s\n", SDL_GetError()); exit(1); } /* http://www.libsdl.org/cgi/docwiki.cgi/SDL_SetVideoMode */ u8g_sdl_screen = SDL_SetVideoMode(WIDTH*u8g_sdl_multiple,HEIGHT*u8g_sdl_multiple,32,SDL_SWSURFACE|SDL_ANYFORMAT); if ( u8g_sdl_screen == NULL ) { printf("Couldn't set video mode: %s\n", SDL_GetError()); exit(1); } //printf("%d bits-per-pixel mode\n", u8g_sdl_screen->format->BitsPerPixel); //printf("%d bytes-per-pixel mode\n", u8g_sdl_screen->format->BytesPerPixel); u8g_sdl_color[0] = SDL_MapRGB( u8g_sdl_screen->format, 0, 0, 0 ); u8g_sdl_color[1] = SDL_MapRGB( u8g_sdl_screen->format, W(100, 50), W(255,50), 0 ); u8g_sdl_color[2] = SDL_MapRGB( u8g_sdl_screen->format, W(100, 80), W(255,80), 0 ); u8g_sdl_color[3] = SDL_MapRGB( u8g_sdl_screen->format, 100, 255, 0 ); /* u8g_sdl_set_pixel(0,0); u8g_sdl_set_pixel(1,1); u8g_sdl_set_pixel(2,2); */ /* update all */ /* http://www.libsdl.org/cgi/docwiki.cgi/SDL_UpdateRect */ SDL_UpdateRect(u8g_sdl_screen, 0,0,0,0); atexit(SDL_Quit); return; } /* return ascii key value or -1 */ int u8g_sdl_get_key(void) { SDL_Event event; /* http://www.libsdl.org/cgi/docwiki.cgi/SDL_PollEvent */ if ( SDL_PollEvent(&event) != 0 ) { switch (event.type) { case SDL_QUIT: exit(0); break; case SDL_KEYDOWN: switch( event.key.keysym.sym ) { /* /usr/include/SDL/SDL_keysym.h */ case SDLK_a: return 'a'; case SDLK_b: return 'b'; case SDLK_c: return 'c'; case SDLK_d: return 'd'; case SDLK_e: return 'e'; case SDLK_f: return 'f'; case SDLK_g: return 'g'; case SDLK_h: return 'h'; case SDLK_i: return 'i'; case SDLK_j: return 'j'; case SDLK_k: return 'k'; case SDLK_l: return 'l'; case SDLK_m: return 'm'; case SDLK_n: return 'n'; case SDLK_o: return 'o'; case SDLK_p: return 'p'; case SDLK_q: return 'q'; case SDLK_r: return 'r'; case SDLK_s: return 's'; case SDLK_t: return 't'; case SDLK_u: return 'u'; case SDLK_v: return 'v'; case SDLK_w: return 'w'; case SDLK_x: return 'x'; case SDLK_y: return 'y'; case SDLK_z: return 'z'; case SDLK_SPACE: return ' '; case SDLK_UP: return 273; case SDLK_DOWN: return 274; case SDLK_RIGHT: return 275; case SDLK_LEFT: return 276; default: return 0; } } } return -1; } /* void main(void) { u8g_sdl_init(); u8g_sdl_set_pixel(0,0,3); u8g_sdl_set_pixel(0,1,3); u8g_sdl_set_pixel(0,2,3); u8g_sdl_set_pixel(1,1,3); u8g_sdl_set_pixel(2,2,3); while( u8g_sdl_get_key() < 0 ) ; } */ static const u8x8_display_info_t u8x8_sdl_128x64_info = { /* chip_enable_level = */ 0, /* chip_disable_level = */ 1, /* post_chip_enable_wait_ns = */ 0, /* pre_chip_disable_wait_ns = */ 0, /* reset_pulse_width_ms = */ 0, /* post_reset_wait_ms = */ 0, /* sda_setup_time_ns = */ 0, /* sck_pulse_width_ns = */ 0, /* sck_takeover_edge = */ 1, /* i2c_bus_clock_100kHz = */ 0, /* data_setup_time_ns = */ 0, /* write_pulse_width_ns = */ 0, /* tile_width = */ 16, /* tile_hight = */ 8, #if U8X8_DEFAULT_FLIP_MODE == 0 /* default_x_offset = */ 0, #else /* default_x_offset = */ 0, #endif }; uint8_t u8x8_d_sdl(u8x8_t *u8g2, uint8_t msg, uint8_t arg_int, void *arg_ptr) { uint8_t x, y, c; uint8_t *ptr; switch(msg) { case U8X8_MSG_DISPLAY_SETUP: u8x8_d_helper_display_setup(u8g2, &u8x8_sdl_128x64_info); break; case U8X8_MSG_DISPLAY_INIT: u8x8_d_helper_display_init(u8g2); u8g_sdl_init(); break; case U8X8_MSG_DISPLAY_SET_POWER_SAVE: break; case U8X8_MSG_DISPLAY_SET_FLIP_MODE: break; case U8X8_MSG_DISPLAY_SET_CONTRAST: break; case U8X8_MSG_DISPLAY_DRAW_TILE: x = ((u8x8_tile_t *)arg_ptr)->x_pos; x *= 8; x += u8g2->x_offset; y = ((u8x8_tile_t *)arg_ptr)->y_pos; y *= 8; do { c = ((u8x8_tile_t *)arg_ptr)->cnt; ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr; u8g_sdl_set_multiple_8pixel(x, y, c*8, ptr); arg_int--; } while( arg_int > 0 ); /* update all */ /* http://www.libsdl.org/cgi/docwiki.cgi/SDL_UpdateRect */ SDL_UpdateRect(u8g_sdl_screen, 0,0,0,0); break; default: return 0; } return 1; } void u8x8_Setup_SDL_128x64(u8x8_t *u8x8) { /* setup defaults */ u8x8_SetupDefaults(u8x8); /* setup specific callbacks */ u8x8->display_cb = u8x8_d_sdl; /* setup display info */ u8x8_display_Setup(u8x8); } void u8g2_Setup_SDL_128x64(u8g2_t *u8g2, const u8g2_cb_t *u8g2_cb) { static uint8_t buf[128*8]; u8x8_Setup_SDL_128x64(u8g2_GetU8x8(u8g2)); u8g2_Setup(u8g2, buf, 8, u8g2_cb); } void u8g2_Setup_SDL_128x64_4(u8g2_t *u8g2, const u8g2_cb_t *u8g2_cb) { static uint8_t buf[128*3]; u8x8_Setup_SDL_128x64(u8g2_GetU8x8(u8g2)); u8g2_Setup(u8g2, buf, 3, u8g2_cb); }