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/* Copyright (c) 2015 Harry Jeffery
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "util.h"
#include <fontconfig/fontconfig.h>
TTF_Font *load_font(const char *font_spec)
{
int font_size;
char *font_name;
/* figure out font size from name, or default to 24 */
char *sep = strchr(font_spec, ':');
if(sep) {
font_name = strndup(font_spec, sep - font_spec);
font_size = strtol(sep+1, NULL, 10);
} else {
font_name = strdup(font_spec);
font_size = 24;
}
FcConfig *cfg = FcInitLoadConfigAndFonts();
FcPattern *pattern = FcNameParse((const FcChar8*)font_name);
FcConfigSubstitute(cfg, pattern, FcMatchPattern);
FcDefaultSubstitute(pattern);
TTF_Font *ret = NULL;
FcResult result = FcResultNoMatch;
FcPattern* font = FcFontMatch(cfg, pattern, &result);
if (font) {
FcChar8 *path = NULL;
if (FcPatternGetString(font, FC_FILE, 0, &path) == FcResultMatch) {
ret = TTF_OpenFont((char*)path, font_size);
}
FcPatternDestroy(font);
}
FcPatternDestroy(pattern);
free(font_name);
return ret;
}
SDL_Texture *create_chequered(SDL_Renderer *renderer)
{
SDL_RendererInfo ri;
SDL_GetRendererInfo(renderer, &ri);
int width = 512;
int height = 512;
if(ri.max_texture_width != 0 && ri.max_texture_width < width) {
width = ri.max_texture_width;
}
if(ri.max_texture_height != 0 && ri.max_texture_height < height) {
height = ri.max_texture_height;
}
const int box_size = 16;
/* Create a chequered texture */
const unsigned char l = 196;
const unsigned char d = 96;
size_t pixels_len = 3 * width * height;
unsigned char *pixels = malloc(pixels_len);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x += box_size) {
unsigned char color = l;
if(((x/box_size) % 2 == 0) ^ ((y/box_size) % 2 == 0)) {
color = d;
}
memset(pixels + 3 * x + 3 * width * y, color, 3 * box_size);
}
}
SDL_Texture *ret = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGB24,
SDL_TEXTUREACCESS_STATIC,
width, height);
SDL_UpdateTexture(ret, NULL, pixels, 3 * width);
free(pixels);
return ret;
}
static int parse_hex_digit(char c) {
if(c >= '0' && c <= '9') {
return c - '0';
} else if (c >= 'a' && c <= 'f') {
return c - 'a' + 10;
} else if (c >= 'A' && c <= 'F') {
return c - 'A' + 10;
}
return -1;
}
int parse_hex_color(const char* str,
unsigned char *r, unsigned char *g, unsigned char *b)
{
if(str[0] == '#') {
++str;
}
if(strlen(str) != 6) {
return 1;
}
for(int i = 0; i < 6; ++i) {
if(!isxdigit(str[i])) {
return 1;
}
}
*r = (parse_hex_digit(str[0]) << 4) + parse_hex_digit(str[1]);
*g = (parse_hex_digit(str[2]) << 4) + parse_hex_digit(str[3]);
*b = (parse_hex_digit(str[4]) << 4) + parse_hex_digit(str[5]);
return 0;
}
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