164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
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#include "u8g2.h"
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#include <stdio.h>
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u8g2_t u8g2;
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/*
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Limitations:
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- Tile positions and sizes (pixel position divided by 8)
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- Any display rotation/mirror is ignored
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- Only works with displays, which support U8x8 API
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- Only available in full buffer mode
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- Will not send the e-paper refresh message
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*/
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u8g2_SendTileSubBuffer(u8g2_t *u8g2, uint8_t x, uint8_t y, uint8_t w, uint8_t h)
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{
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uint16_t page_size;
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uint8_t *ptr;
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page_size = u8g2->pixel_buf_width; /* 8*u8g2->u8g2_GetU8x8(u8g2)->display_info->tile_width */
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ptr = u8g2_GetBufferPtr(u8g2);
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ptr += x*8;
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ptr += page_size*y;
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while( h > 0 )
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{
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u8x8_DrawTile( u8g2_GetU8x8(u8g2), x, y, w, ptr );
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ptr += page_size;
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y++;
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h--;
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}
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}
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/*
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sub buffer window in pixel coordinates
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lower left corner is NOT included, this means the transfer range is from
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x0..x1-1
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y0..y1-1
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*/
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void u8g2_SendWindow(u8g2_t *u8g2, u8g2_uint_t x0, u8g2_uint_t y0, u8g2_uint_t x1, u8g2_uint_t y1)
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{
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x0 /= 8;
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y0 /= 8;
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x1 += 7;
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x1 /= 8;
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y1 +=7;
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y1 /= 8;
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u8g2_SendTileSubBuffer(u8g2, x0, y0, x1-x0, y1-y0);
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}
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int main(void)
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{
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int x, y;
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int k;
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//u8g2_SetupBuffer_SDL_240x160(&u8g2, &u8g2_cb_r0);
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u8g2_SetupBuffer_SDL_128x64(&u8g2, &u8g2_cb_r0);
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//u8x8_ConnectBitmapToU8x8(u8g2_GetU8x8(&u8g2)); /* connect to bitmap */
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u8x8_InitDisplay(u8g2_GetU8x8(&u8g2));
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u8x8_SetPowerSave(u8g2_GetU8x8(&u8g2), 0);
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u8g2_SetFont(&u8g2, u8g2_font_helvB18_tr);
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x = 30;
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y = 35;
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for(;;)
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{
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#ifdef U8G2_WITH_HVLINE_COUNT
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u8g2.hv_cnt = 0UL;
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#endif /* U8G2_WITH_HVLINE_COUNT */
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u8g2_ClearBuffer(&u8g2);
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u8g2_SetFontDirection(&u8g2, 0);
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u8g2_DrawStr(&u8g2, x, y, "A");
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u8g2_SetFontDirection(&u8g2, 1);
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u8g2_DrawStr(&u8g2, x, y, "a");
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u8g2_SetFontDirection(&u8g2, 2);
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u8g2_DrawStr(&u8g2, x, y, "a");
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u8g2_SetFontDirection(&u8g2, 3);
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u8g2_DrawStr(&u8g2, x, y, "a");
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u8g2_DrawHVLine(&u8g2, u8g2.user_x0, u8g2.user_y0, 1, 0);
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u8g2_DrawHVLine(&u8g2, u8g2.user_x0, u8g2.user_y1-1, 1, 0);
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u8g2_DrawHVLine(&u8g2, u8g2.user_x1-1, u8g2.user_y1-1, 1, 0);
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u8g2_DrawHVLine(&u8g2, u8g2.user_x1-1, u8g2.user_y0, 1, 0);
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//u8g2_SendBuffer(&u8g2);
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//u8g2_SendTileSubBuffer(&u8g2, 2, 2, 12, 3);
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u8g2_SendWindow(&u8g2, 9, 17, 120, 42);
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//u8g2_SendTileWindow(&u8g2, 0, 0, 16, 8);
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/*
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u8g2_FirstPage(&u8g2);
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i = 0;
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do
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{
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u8g2_SetFontDirection(&u8g2, 0);
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u8g2_DrawStr(&u8g2, x, y, "ABC");
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u8g2_SetFontDirection(&u8g2, 1);
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u8g2_DrawStr(&u8g2, x, y, "abc");
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u8g2_SetFontDirection(&u8g2, 2);
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u8g2_DrawStr(&u8g2, x, y, "abc");
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u8g2_SetFontDirection(&u8g2, 3);
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u8g2_DrawStr(&u8g2, x, y, "abc");
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if ( i == 1 )
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{
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u8g2_DrawHVLine(&u8g2, u8g2.user_x0, u8g2.user_y0, 1, 0);
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u8g2_DrawHVLine(&u8g2, u8g2.user_x0, u8g2.user_y1-1, 1, 0);
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u8g2_DrawHVLine(&u8g2, u8g2.user_x1-1, u8g2.user_y1-1, 1, 0);
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u8g2_DrawHVLine(&u8g2, u8g2.user_x1-1, u8g2.user_y0, 1, 0);
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}
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i++;
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} while( u8g2_NextPage(&u8g2) );
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*/
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#ifdef U8G2_WITH_HVLINE_COUNT
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printf("hv cnt: %ld\n", u8g2.hv_cnt);
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#endif /* U8G2_WITH_HVLINE_COUNT */
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do
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{
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k = u8g_sdl_get_key();
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} while( k < 0 );
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if ( k == 273 ) y -= 7;
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if ( k == 274 ) y += 7;
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if ( k == 276 ) x -= 7;
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if ( k == 275 ) x += 7;
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if ( k == 'e' ) y -= 1;
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if ( k == 'x' ) y += 1;
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if ( k == 's' ) x -= 1;
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if ( k == 'd' ) x += 1;
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if ( k == 'q' ) break;
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//if ( k == 't' )
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// u8x8_SaveBitmapTGA(u8g2_GetU8x8(&u8g2), "screenshot.tga");
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}
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//u8x8_Set8x8Font(u8g2_GetU8x8(&u8g2), bdf_font);
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//u8x8_Draw8x8String(u8g2_GetU8x8(&u8g2), 0, 0, "Hello World!");
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return 0;
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}
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