Simple wireframe font editor, to generate font in C array which later can be used in touchscreen keyboard
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pelya
330
project/sdl/sdl-1.3/inlinefont/editor.cpp
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330
project/sdl/sdl-1.3/inlinefont/editor.cpp
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <SDL.h>
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#include <vector>
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#include <algorithm>
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#include <string>
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const char * fname = "touchscreenfont.h";
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struct font_line_t { Uint8 x1, y1, x2, y2; };
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std::vector< std::vector<font_line_t> > font;
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enum { DRAWAREA = 512, BORDERAREA = 10 };
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int currentChar = 0;
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int drawX, drawY, drawStarted = 0;
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void load()
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{
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FILE * ff = fopen(fname, "r");
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if(!ff)
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return;
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std::string s;
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char buf[32];
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int readed = 0;
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while( ( readed = fread(buf, 1, sizeof(buf), ff) ) > 0 )
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{
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s.append(buf, readed);
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}
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fclose(ff);
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font.clear();
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std::string::size_type f;
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f = s.find("FONT_MAX_LINES_PER_CHAR =");
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f = s.find("=", f) + 1;
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int maxLines = atoi(s.c_str() + f);
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f = s.find("font_line_t font[", f);
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f = s.find("[", f) + 1;
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int numChars = atoi(s.c_str() + f);
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for(int i = 0; i < numChars; i++)
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{
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font.push_back( std::vector<font_line_t>() );
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for( int ii = 0; ii < maxLines; ii++ )
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{
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font_line_t line;
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f = s.find("\t\t{ ", f) + 4;
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line.x1 = atoi(s.c_str() + f);
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f = s.find(",", f) + 1;
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line.y1 = atoi(s.c_str() + f);
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f = s.find(",", f) + 1;
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line.x2 = atoi(s.c_str() + f);
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f = s.find(",", f) + 1;
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line.y2 = atoi(s.c_str() + f);
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if( line.x1 > 0 && line.y1 > 0 && line.x2 > 0 && line.y2 > 0 )
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font.back().push_back(line);
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};
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};
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if(font.size() == 0)
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font.resize(1);
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}
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void save()
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{
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FILE * ff = fopen(fname, "w");
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fprintf(ff, "#ifndef _TOUCHSCREENFONT_H_\n#define _TOUCHSCREENFONT_H_\n");
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fprintf(ff, "#include <SDL_types.h>\n");
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fprintf(ff, "typedef struct font_line_t { Uint8 x1, y1, x2, y2; } font_line_t;\n");
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int maxLines = 0;
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for( size_t i = 0; i < font.size(); i++ )
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if( maxLines < font[i].size() )
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maxLines = font[i].size();
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fprintf(ff, "enum { FONT_MAX_LINES_PER_CHAR = %i };\n", maxLines);
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fprintf(ff, "font_line_t font[%d][FONT_MAX_LINES_PER_CHAR] = {\n", (int)font.size());
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for( size_t i = 0; i < font.size(); i++ )
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{
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fprintf(ff, "\t{\n");
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for( size_t ii = 0; ii < maxLines; ii++ )
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{
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fprintf(ff, "\t\t{ ");
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if( ii < font[i].size() )
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fprintf(ff, "%3d, %3d, %3d, %3d",
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(int)font[i][ii].x1,
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(int)font[i][ii].y1,
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(int)font[i][ii].x2,
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(int)font[i][ii].y2 );
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else
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fprintf(ff, " 0, 0, 0, 0");
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fprintf(ff, " }%s\n", ii + 1 < maxLines ? "," : "" );
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}
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fprintf(ff, "\t}%s\n", i + 1 < font.size() ? "," : "" );
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}
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fprintf(ff, "};\n");
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fprintf(ff, "#endif\n");
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fclose(ff);
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}
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void DrawLine(SDL_Surface * bmp, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color)
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{
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int dx = x2-x1;
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int dy = y2-y1;
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int i1, i2;
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int x, y;
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int dd;
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Uint16 d = color;
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#define proc( bmp, x, y, d ) * (Uint16 *)( bmp->pixels + bmp->pitch * (y) + (x) * 2 ) = d
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/* worker macro */
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#define DO_LINE(pri_sign, pri_c, pri_cond, sec_sign, sec_c, sec_cond) \
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{ \
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if (d##pri_c == 0) { \
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proc(bmp, x1, y1, d); \
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return; \
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} \
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\
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i1 = 2 * d##sec_c; \
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dd = i1 - (sec_sign (pri_sign d##pri_c)); \
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i2 = dd - (sec_sign (pri_sign d##pri_c)); \
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\
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x = x1; \
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y = y1; \
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\
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while (pri_c pri_cond pri_c##2) { \
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proc(bmp, x, y, d); \
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\
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if (dd sec_cond 0) { \
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sec_c sec_sign##= 1; \
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dd += i2; \
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} \
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else \
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dd += i1; \
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\
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pri_c pri_sign##= 1; \
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} \
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}
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if (dx >= 0) {
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if (dy >= 0) {
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if (dx >= dy) {
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/* (x1 <= x2) && (y1 <= y2) && (dx >= dy) */
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DO_LINE(+, x, <=, +, y, >=);
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}
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else {
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/* (x1 <= x2) && (y1 <= y2) && (dx < dy) */
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DO_LINE(+, y, <=, +, x, >=);
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}
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}
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else {
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if (dx >= -dy) {
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/* (x1 <= x2) && (y1 > y2) && (dx >= dy) */
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DO_LINE(+, x, <=, -, y, <=);
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}
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else {
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/* (x1 <= x2) && (y1 > y2) && (dx < dy) */
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DO_LINE(-, y, >=, +, x, >=);
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}
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}
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}
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else {
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if (dy >= 0) {
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if (-dx >= dy) {
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/* (x1 > x2) && (y1 <= y2) && (dx >= dy) */
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DO_LINE(-, x, >=, +, y, >=);
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}
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else {
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/* (x1 > x2) && (y1 <= y2) && (dx < dy) */
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DO_LINE(+, y, <=, -, x, <=);
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}
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}
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else {
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if (-dx >= -dy) {
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/* (x1 > x2) && (y1 > y2) && (dx >= dy) */
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DO_LINE(-, x, >=, -, y, <=);
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}
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else {
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/* (x1 > x2) && (y1 > y2) && (dx < dy) */
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DO_LINE(-, y, >=, -, x, <=);
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}
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}
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}
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#undef DO_LINE
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};
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void draw()
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{
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SDL_FillRect(SDL_GetVideoSurface(), NULL, 0);
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SDL_LockSurface(SDL_GetVideoSurface());
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if( font.size() > currentChar )
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{
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for( int i = 0; i < font[currentChar].size(); i++ )
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{
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DrawLine( SDL_GetVideoSurface(), font[currentChar][i].x1 * 2, font[currentChar][i].y1 * 2,
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font[currentChar][i].x2 * 2, font[currentChar][i].y2 * 2, 0xffff );
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}
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}
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if( drawStarted )
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{
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int x, y;
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SDL_GetMouseState(&x, &y);
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if( x/2 < DRAWAREA && y/2 < DRAWAREA )
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DrawLine( SDL_GetVideoSurface(), (x/2)*2, (y/2)*2, drawX*2, drawY*2, 0x9999 );
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}
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DrawLine( SDL_GetVideoSurface(), DRAWAREA, 0, DRAWAREA, DRAWAREA, 0x4444 );
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for( int i = 0; i < font.size(); i++ )
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{
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DrawLine( SDL_GetVideoSurface(), DRAWAREA, i * 4,
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DRAWAREA + ( font[i].size() < BORDERAREA - 1 ? font[i].size() : BORDERAREA - 1 ), i * 4, 0x7777 );
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}
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DrawLine( SDL_GetVideoSurface(), DRAWAREA, currentChar * 4, DRAWAREA + BORDERAREA - 1, currentChar * 4, 0xAAAA );
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DrawLine( SDL_GetVideoSurface(), DRAWAREA, currentChar * 4 + 1, DRAWAREA + BORDERAREA - 1, currentChar * 4 + 1, 0xAAAA );
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DrawLine( SDL_GetVideoSurface(), DRAWAREA, font.size() * 4, DRAWAREA + BORDERAREA - 1, font.size() * 4, 0x5555 );
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SDL_UnlockSurface(SDL_GetVideoSurface());
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SDL_Flip(SDL_GetVideoSurface());
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}
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int
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main(int argc, char *argv[])
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{
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int width = DRAWAREA + BORDERAREA;
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int height = DRAWAREA;
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SDL_Surface *screen;
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int done;
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Uint8 *keys;
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SDL_Init(SDL_INIT_VIDEO);
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screen = SDL_SetVideoMode(width, height, 16, SDL_DOUBLEBUF);
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if ( ! screen ) {
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fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError());
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SDL_Quit();
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exit(2);
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}
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SDL_WM_SetCaption("Touchscreen keyboard font editor", "Touchscreen keyboard font editor");
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if(font.size() == 0)
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font.resize(1);
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load();
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done = 0;
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while ( ! done ) {
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SDL_Event event;
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while ( SDL_PollEvent(&event) ) {
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switch(event.type) {
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case SDL_QUIT:
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done = 1;
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break;
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case SDL_MOUSEBUTTONDOWN:
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if( event.button.x < DRAWAREA )
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{
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if (event.button.button == SDL_BUTTON_LEFT)
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{
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if( !drawStarted )
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{
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drawStarted = 1;
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drawX = event.button.x/2;
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drawY = event.button.y/2;
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}
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else
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{
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drawStarted = 0;
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font_line_t line;
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line.x1 = drawX;
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line.y1 = drawY;
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line.x2 = event.button.x/2;
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line.y2 = event.button.y/2;
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font[currentChar].push_back(line);
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}
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}
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else
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{
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if(font[currentChar].size() > 0)
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font[currentChar].pop_back();
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}
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}
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else
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{
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if (event.button.button == SDL_BUTTON_LEFT)
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{
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currentChar = event.button.y / 4;
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if(font.size() <= currentChar)
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font.resize(currentChar + 1);
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}
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else
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{
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currentChar = event.button.y / 4;
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font.resize(currentChar + 1);
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}
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}
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break;
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}
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}
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#if SDL_VERSION_ATLEAST(1,3,0)
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keys = SDL_GetKeyboardState(NULL);
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if ( keys[SDL_SCANCODE_ESCAPE] ) {
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done = 1;
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}
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#else
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keys = SDL_GetKeyState(NULL);
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if ( keys[SDLK_ESCAPE] ) {
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done = 1;
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}
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#endif
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draw();
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};
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save();
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SDL_Quit();
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return 0;
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}
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