This commit is contained in:
kraus
parent
a754a9eaa0
commit
5679d3fbba
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@ -0,0 +1,15 @@
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CC = gcc-4.8
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# CFLAGS = -g -pg -Wall -I../../../csrc/. -DNO_SDL
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CFLAGS = -g -pg -Wall -I../../../csrc/. `sdl2-config --cflags`
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SRC = $(shell ls ../../../csrc/*.c) $(shell ls ../common/*.c ) main.c
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OBJ = $(SRC:.c=.o)
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helloworld: $(OBJ)
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# $(CC) $(CFLAGS) $(LDFLAGS) $(OBJ) -o u8g2_sdl
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$(CC) $(CFLAGS) $(LDFLAGS) $(OBJ) `sdl2-config --libs` -o u8g2_sdl
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clean:
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-rm $(OBJ) u8g2_sdl
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/* Shennong */
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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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The Farmer God Shen Nong Tastes All the Plants
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http://chinesereadingpractice.com/2012/08/22/the-farmer-god-shen-nong-tastes-all-the-plants/
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All his life, Shen Nong had a crystal abdomen, and one could
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clearly see all of his internal organs. At that time, humans were
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often getting sick and even dying because they ate things
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indiscriminately [not knowing if they were good or bad]. Shen
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Nong determinedly tasted everything everywhere; the
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good-tasting things he put in a bag on his left side, those were
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for people to eat; the bad-tasting things he put in a bag on his
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right side, and those were used for medicine.
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The first time, Shen Nong tasted a small fresh leaf. As this leaf
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fell into his stomach, it cleaned every inch of his insides so that
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every organ top and bottom was fresh and cool, as if [the leaf]
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was somehow on patrol [making the rounds], so Shen Nong
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called it “chá” [to investigate / check], and later generations of
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men called it “chá” [tea]. Shen Nong put it in the bag on the
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right. The second time, Shen Nong tasted a little light red flower
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that looked like a butterfly, which was sweet and delicious, with
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an exotic smell that filled his nostrils, so he called it “licorice”. He
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put it in the bag on the left. In this way, Shen Nong diligently
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tasted all manner of flora, and every time he was poisoned, he
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used tea to rescue himself. Before long, the bag on his left
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contained 47,000 kinds of flowers, grasses, roots and leaves,
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and the right side had 398,000 kinds.
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But one day, Shen Nong tasted “heartbreak grass”, and this
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poison was too terrible, so there wasn’t enough time to eat the
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tea leaves to detoxify and he died. He sacrificed himself to save
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humanity, so people call him the “Bodhisattva of Medicine”, and
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people forever commemorate him through this story.
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*/
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/* The Farmer God Shen Nong Tastes All the Plants */
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const char c_str[] =
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"Shen Nong\n\n"
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"神农一生下来就是\n"
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"个水晶肚子，五脏\n"
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"六腑全都能看得一\n"
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"清二楚。那时侯，\n"
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"人们经常因为乱吃\n"
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"东西而生病，甚至\n"
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"丧命。神农决心尝\n"
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"遍所有的东西，好\n"
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"吃的放在身边左边\n"
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"的袋子里，给人吃\n"
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"；\n"
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"不好吃的就放在身\n"
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"子右边的袋子里，\n"
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"作药用。\n"
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"第一次，神农尝了\n"
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"一片小嫩叶。这叶\n"
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"片一落进肚里，就\n"
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"上上下下地把里面\n"
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"各器官擦洗得清清\n"
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"爽爽，\n"
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"象巡查似的，\n"
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"神农把它叫做\n"
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"“查”，\n"
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"就是后人所称的\n"
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"“茶”。\n"
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"神农将它放进右边\n"
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"袋子里。第二次，\n"
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"神农尝了朵蝴蝶样\n"
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"的淡红小花，甜津\n"
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"津的，香味扑鼻，\n"
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"这是“甘草”。他把\n"
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"它放进了左边袋子\n"
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"里。就这样，神农\n"
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"辛苦地尝遍百草，\n"
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"每次中毒，都靠茶\n"
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"来解救。后来，\n"
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"他左边的袋子里花\n"
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"草根叶有四万七千\n"
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"种，右边有三十九\n"
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"万八千种。\n"
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"但有一天，神农尝\n"
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"到了“断肠草”，这\n"
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"种毒草太厉害了，\n"
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"他还来不及吃茶解\n"
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"毒就死了。\n"
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"他是为了拯救人们\n"
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"而牺牲的，人们称\n"
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"他为“药王菩萨”，\n"
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"人间以这个神话故\n"
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"事永远地纪念他。\n";
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#define SCROLL_DELTA 1
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/* return number of unkown glyphs */
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/*
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uint16_t check_str(const char *str)
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{
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uint16_t e, cnt;
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u8g2.u8x8.next_cb = u8x8_utf8_next;
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u8x8_utf8_init(u8g2_GetU8x8(&u8g2));
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cnt = 0;
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for(;;)
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{
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e = u8g2.u8x8.next_cb(u8g2_GetU8x8(&u8g2), (uint8_t)*str);
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if ( e == 0x0ffff )
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break;
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str++;
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if ( e != 0x0fffe )
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{
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if ( u8g2_IsGlyph(&u8g2, e) != 0 )
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{
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cnt++;
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}
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}
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}
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return cnt;
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}
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*/
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int main(void)
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{
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static char buf[128];
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uint8_t total_lines; // the total number of lines in the story
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uint8_t i; // loop variable for the lines
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uint8_t line_cnt; // number of lines to draw, usually equal to lines_per_draw
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uint8_t start_line; // topmost visible line, derived from top_window_pos
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uint8_t lines_per_draw; // how many lines to draw on the screen, derived from font and display height
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uint16_t glyph_height; // height of the glyphs
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uint16_t top_window_pos; // defines the display position in pixel within the text
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uint16_t total_height; // total height in pixel, derived from font height and total_lines
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u8g2_uint_t top_offset; // offset between the first visible line and the display
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u8g2_SetupBuffer_SDL_128x64_4(&u8g2, &u8g2_cb_r0);
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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_wqy12_t_chinese1); // two unknown glyphs
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//u8g2_SetFont(&u8g2, u8g2_font_wqy12_t_chinese3); // two unknown glyphs
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//u8g2_SetFont(&u8g2, u8g2_font_wqy12_t_gb2312a); // ";" is missing
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u8g2_SetFont(&u8g2, u8g2_font_wqy12_t_gb2312b); // all glyphs available
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/* calculate the length of the text in lines */
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total_lines = u8x8_GetStringLineCnt(c_str);
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/* get the height of the glyphs */
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glyph_height = u8g2_GetMaxCharHeight(&u8g2);
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/* calculate the height of the text in pixel */
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total_height = (uint16_t)total_lines * (uint16_t)glyph_height;
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/* calculate how many lines must be drawn on the screen */
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lines_per_draw = u8g2_GetDisplayHeight(&u8g2) / glyph_height;
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lines_per_draw += 2;
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printf("Total lines: %d\n", (int)total_lines);
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printf("Glyph height: %d\n", (int)glyph_height);
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printf("Number of lines to draw: %d\n", (int)lines_per_draw);
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top_window_pos = 0;
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for(;;)
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{
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//printf("Pos: %d\n", (int)top_window_pos);
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start_line = top_window_pos / glyph_height;
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top_offset = top_window_pos % glyph_height;
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line_cnt = total_lines - start_line;
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if ( line_cnt > lines_per_draw )
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line_cnt = lines_per_draw;
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u8g2_FirstPage(&u8g2);
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do
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{
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u8g2_SetFontDirection(&u8g2, 0);
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for( i = 0; i < line_cnt; i++ )
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{
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u8x8_CopyStringLine(buf, i+start_line, c_str);
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u8g2_DrawUTF8(&u8g2, 0, i*glyph_height-top_offset +glyph_height, buf);
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}
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} while( u8g2_NextPage(&u8g2) );
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if ( top_window_pos < total_height )
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{
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top_window_pos+=SCROLL_DELTA;
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}
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else
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{
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break;
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}
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}
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return 0;
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}
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@ -3,7 +3,9 @@
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*/
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#include "u8g2.h"
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#ifndef NO_SDL
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#include "SDL.h"
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#endif
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#include <assert.h>
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//#define HEIGHT (64)
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#define W(x,w) (((x)*(w))/100)
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#ifndef NO_SDL
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SDL_Window *u8g_sdl_window;
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SDL_Surface *u8g_sdl_screen;
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#endif
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int u8g_sdl_multiple = 3;
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Uint32 u8g_sdl_color[256];
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uint32_t u8g_sdl_color[256];
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int u8g_sdl_height, u8g_sdl_width;
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static void u8g_sdl_set_pixel(int x, int y, int idx)
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{
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Uint32 *ptr;
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Uint32 offset;
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uint32_t *ptr;
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uint32_t offset;
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int i, j;
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if ( y >= u8g_sdl_height )
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for( i = 0; i < u8g_sdl_multiple; i++ )
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for( j = 0; j < u8g_sdl_multiple; j++ )
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{
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#ifndef NO_SDL
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offset = (
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((y * u8g_sdl_multiple) + i) * (u8g_sdl_width * u8g_sdl_multiple) +
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((x * u8g_sdl_multiple) + j)) * u8g_sdl_screen->format->BytesPerPixel;
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assert( offset < (Uint32)(u8g_sdl_width * u8g_sdl_multiple * u8g_sdl_height * u8g_sdl_multiple * u8g_sdl_screen->format->BytesPerPixel) );
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ptr = u8g_sdl_screen->pixels + offset;
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*ptr = u8g_sdl_color[idx];
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#endif
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}
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}
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u8g_sdl_height = height;
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u8g_sdl_width = width;
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#ifndef NO_SDL
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if (SDL_Init(SDL_INIT_VIDEO) != 0)
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{
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SDL_UpdateWindowSurface(u8g_sdl_window);
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atexit(SDL_Quit);
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#endif
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return;
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}
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@ -290,8 +299,9 @@ uint8_t u8x8_d_sdl_128x64(u8x8_t *u8g2, uint8_t msg, uint8_t arg_int, void *arg_
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} while( arg_int > 0 );
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/* update all */
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#ifndef NO_SDL
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SDL_UpdateWindowSurface(u8g_sdl_window);
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#endif
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break;
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default:
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return 0;
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@ -334,8 +344,10 @@ uint8_t u8x8_d_sdl_240x160(u8x8_t *u8g2, uint8_t msg, uint8_t arg_int, void *arg
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arg_int--;
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} while( arg_int > 0 );
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#ifndef NO_SDL
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/* update all */
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SDL_UpdateWindowSurface(u8g_sdl_window);
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#endif
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break;
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default:
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@ -1,10 +1,13 @@
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#ifndef NO_SDL
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#include "SDL.h"
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#endif
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/* return ascii key value or -1 */
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int u8g_sdl_get_key(void)
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{
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#ifndef NO_SDL
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SDL_Event event;
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/* http://www.libsdl.org/cgi/docwiki.cgi/SDL_PollEvent */
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if ( SDL_PollEvent(&event) != 0 )
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}
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}
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}
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#endif
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return -1;
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}
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