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- /*
-
- png2bdf.c
-
- Copyright (c) 2017, olikraus@gmail.com
- All rights reserved.
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
- * Redistributions of source code must retain the above copyright notice, this list
- of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright notice, this
- list of conditions and the following disclaimer in the documentation and/or other
- materials provided with the distribution.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- http://www.libpng.org/pub/png/libpng-manual.txt
- icons:
- http://ionicons.com/
- http://ionicons.com/cheatsheet.html
-
- https://github.com/iconic/open-iconic
- https://github.com/iconic/open-iconic/blob/master/font/css/open-iconic.styl
-
- gibts nicht mehr:
- https://www.joomlart.com/blog/news-updates/freebie-meals-vector-set-120-icons-png-svg
- */
- #include <unistd.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <stdarg.h>
- #include <stdint.h>
- #define PNG_DEBUG 3
- #include <png.h>
- /*================================================*/
- char *bdf_file_name = NULL;
- char *bdf_font_name = NULL;
- char *bdf_copyright = NULL;
- FILE *bdf_fp = NULL;
- long encoding = 48;
- int is_invert = 0;
- /*================================================*/
- int width, height;
- png_byte color_type;
- png_byte bit_depth;
- uint8_t min, max;
- png_structp png_ptr;
- png_infop info_ptr;
- png_bytep * row_pointers;
- void print_info(const char* file_name)
- {
- printf("%s: png_get_image_width(png_ptr, info_ptr)=%d\n", file_name, png_get_image_width(png_ptr, info_ptr));
- printf("%s: png_get_image_height(png_ptr, info_ptr)=%d\n", file_name, png_get_image_height(png_ptr, info_ptr));
- /*
- #define PNG_COLOR_MASK_PALETTE 1
- #define PNG_COLOR_MASK_COLOR 2
- #define PNG_COLOR_MASK_ALPHA 4
-
- #define PNG_COLOR_TYPE_GRAY 0
- #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
- #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
- #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
- #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
- */
-
- printf("%s: png_get_color_type(png_ptr, info_ptr)=%d\n", file_name, png_get_color_type(png_ptr, info_ptr));
- printf("%s: png_get_bit_depth(png_ptr, info_ptr)=%d\n", file_name, png_get_bit_depth(png_ptr, info_ptr));
- printf("%s: png_get_rowbytes(png_ptr, info_ptr)=%lu\n", file_name, png_get_rowbytes(png_ptr, info_ptr));
- printf("%s: range: %d .. %d\n", file_name, min, max);
-
- }
- void print_short_info(const char* file_name)
- {
- printf("%s enc=%ld w=%d h=%d\n", file_name, encoding, width, height);
- }
- uint8_t get_gray(int x, int y)
- {
-
- uint8_t *p;
- uint8_t g;
- if ( color_type & PNG_COLOR_MASK_ALPHA )
- {
- p = row_pointers[y] + x*4;
- g = ((int)p[0] + (int)p[1] + (int)p[2])/3;
- g = ((int)g+(int)p[3])/2;
- return g;
- }
- p = row_pointers[y] + x*3;
- return ((int)p[0] + (int)p[1] + (int)p[2])/3;
- }
- uint8_t get_pixel(int x, int y)
- {
- if ( x < 0 )
- return 0;
- if ( x >= width )
- return 0;
- if ( y < 0 )
- return 0;
- if ( y >= height )
- return 0;
- if ( get_gray(x, y) > 128/2 )
- return is_invert == 0 ? 1 : 0;
- return is_invert == 0 ? 0 : 1;
- }
- uint8_t get_pixel_byte(int x, int y)
- {
- uint8_t b = 0;
- int i;
- for( i = 0; i < 8; i++ )
- {
- b <<= 1;
- b |= get_pixel(x + i,y);
- }
- return b;
- }
- void write_4bit(int x)
- {
- if ( bdf_fp == NULL )
- return;
- if ( x < 10 )
- fprintf(bdf_fp, "%c", x + '0' );
- else
- fprintf(bdf_fp, "%c", x - 10 + 'a' );
- }
- void write_byte(int x)
- {
- write_4bit(x >> 4);
- write_4bit(x & 15);
- }
- void write_bdf_bitmap(const char *filename)
- {
- int x, y;
-
- if ( bdf_fp == NULL )
- return;
-
- fprintf(bdf_fp, "STARTCHAR %s\n", filename);
- fprintf(bdf_fp, "ENCODING %ld\n", encoding);
- fprintf(bdf_fp, "DWIDTH %d 0\n", width);
- fprintf(bdf_fp, "BBX %d %d 0 0\n", width, height);
- fprintf(bdf_fp, "BITMAP\n");
-
- for( y = 0; y < height; y++ )
- {
- x = 0;
- while( x < width )
- {
- write_byte(get_pixel_byte(x,y));
- x+=8;
- }
- fprintf(bdf_fp, "\n" );
- }
- fprintf(bdf_fp, "ENDCHAR\n");
- encoding++;
- }
- void show_ascii(void)
- {
- int x, y;
- for( y = 0; y < height; y++ )
- {
- for( x = 0; x < width; x++ )
- {
- if ( get_gray(x, y) > 128/2 )
- printf("#");
- else
- printf(".");
- }
- printf("\n");
- }
- }
- void calc_min_max(void)
- {
- int x, y;
- uint8_t val;
- min = 255;
- max = 0;
- for( y = 0; y < height; y++ )
- {
- for( x = 0; x < width; x++ )
- {
- val = get_gray(x, y);
- if ( max < val )
- max = val;
- if ( min > val )
- min = val;
- }
- }
- }
- int read_png_file(const char* file_name)
- {
- unsigned char header[8]; // 8 is the maximum size that can be checked
- /* open file and test for it being a png */
- FILE *fp = fopen(file_name, "rb");
- if (fp == NULL)
- return 0; /* open error */
- fread(header, 1, 8, fp);
- if (png_sig_cmp(header, 0, 8))
- return fclose(fp), 0; /* not a png file error */
- png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (png_ptr == NULL)
- return fclose(fp), 0; /* alloc read struct */
- info_ptr = png_create_info_struct(png_ptr);
- if (info_ptr == NULL )
- return fclose(fp), 0; /* alloc info struct */
- if (setjmp(png_jmpbuf(png_ptr)))
- {
- png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
- return fclose(fp), 0; /* library error */
- }
- png_init_io(png_ptr, fp);
- png_set_sig_bytes(png_ptr, 8);
- png_read_png(png_ptr, info_ptr,
- PNG_TRANSFORM_SCALE_16|
- //PNG_TRANSFORM_STRIP_ALPHA|
- PNG_TRANSFORM_PACKING|
- //PNG_TRANSFORM_INVERT_ALPHA |
- //PNG_TRANSFORM_INVERT_MONO |
- PNG_TRANSFORM_GRAY_TO_RGB
- , NULL);
- width = png_get_image_width(png_ptr, info_ptr);
- height = png_get_image_height(png_ptr, info_ptr);
- color_type = png_get_color_type(png_ptr, info_ptr);
- bit_depth = png_get_bit_depth(png_ptr, info_ptr);
- row_pointers = png_get_rows(png_ptr, info_ptr);
-
- //calc_min_max();
- //print_info(file_name);
- print_short_info(file_name);
- //show_ascii();
- write_bdf_bitmap(file_name);
-
- png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
- fclose(fp);
-
- return 1;
-
- }
- void help(void)
- {
- printf("png2bdf [BDF options] { [PNG options] png-file }\n");
- printf(" BDF options (use at the beginning):'\n");
- printf(" -o output.bdf\n");
- printf(" -f 'name of the font'\n");
- printf(" -c 'copyright note'\n");
- printf(" PNG options (use before png-file):'\n");
- printf(" -e <enc> Use the specified encoding number for the next image.\n");
- printf(" -i Invert next images\n");
- printf(" -n Do not invert next images\n");
-
- }
- void write_bdf_header(void)
- {
- fprintf(bdf_fp, "STARTFONT 2.1\n");
- fprintf(bdf_fp, "FONT");
- if ( bdf_font_name == NULL )
- fprintf(bdf_fp, " \"unknown\"\n");
- else
- fprintf(bdf_fp, " \"%s\"\n", bdf_font_name);
-
- fprintf(bdf_fp, "SIZE 16 75 75\n");
- fprintf(bdf_fp, "FONTBOUNDINGBOX 16 16 0 0\n");
- fprintf(bdf_fp, "STARTPROPERTIES 3\n");
- fprintf(bdf_fp, "COPYRIGHT");
- if ( bdf_copyright == NULL )
- fprintf(bdf_fp, " \"unknown\"\n");
- else
- fprintf(bdf_fp, " \"%s\"\n", bdf_copyright);
- fprintf(bdf_fp, "FONT_ASCENT 0\n");
- fprintf(bdf_fp, "FONT_DESCENT 0\n");
-
- fprintf(bdf_fp, "ENDPROPERTIES\n");
-
- }
- int main(int argc, char **argv)
- {
- if ( argc < 2 )
- {
- help();
- return 0;
- }
- argc--; argv++;
- do
- {
- if ( argv[0][0] == '-' )
- {
- if ( strcmp(argv[0], "-f") == 0 )
- {
- argc--; argv++;
- if ( argc > 0 )
- {
- bdf_font_name = argv[0];
- argc--; argv++;
- }
- }
- if ( strcmp(argv[0], "-o") == 0 )
- {
- argc--; argv++;
- if ( argc > 0 )
- {
- bdf_file_name = argv[0];
- argc--; argv++;
- bdf_fp = fopen(bdf_file_name, "wb");
- if ( bdf_fp == NULL )
- {
- perror(bdf_file_name);
- exit(1);
- }
- write_bdf_header();
- }
- }
- else if ( strcmp(argv[0], "-c") == 0 )
- {
- argc--; argv++;
- if ( argc > 0 )
- {
- bdf_copyright = argv[0];
- argc--; argv++;
- }
- }
- else if ( strcmp(argv[0], "-e") == 0 )
- {
- argc--; argv++;
- if ( argc > 0 )
- {
- encoding = atol(argv[0]);
- argc--; argv++;
- }
- }
- else if ( strcmp(argv[0], "-i") == 0 )
- {
- argc--; argv++;
- is_invert = 1;
- }
- else if ( strcmp(argv[0], "-n") == 0 )
- {
- argc--; argv++;
- is_invert = 0;
- }
-
- }
- else
- {
- {
- /* parse png image */
- read_png_file(argv[0]);
- argc--; argv++;
- }
- }
-
-
-
- } while( argc > 0 );
-
- if ( bdf_fp != NULL )
- fclose(bdf_fp);
-
- return 0;
- }
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