+++ /dev/null
-/*
-
- silcmap_bitmap.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 2003 - 2004 Pekka Riikonen
-
- 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; version 2 of the License.
-
- 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.
-
-*/
-
-#include "silcincludes.h"
-#include "silcclient.h"
-#include <math.h>
-#include "silcmap.h"
-#include "data.h"
-
-/******* Bitmap Routines *****************************************************/
-
-/* Load a bitmap file. The file is the map image that is loaded into
- the SilcMap context. This is no perfect PPM loader. */
-
-bool silc_map_load_ppm(SilcMap map, const char *filename)
-{
- int fd;
- char type[3];
- unsigned char header[80];
- int ret, retval = TRUE, i;
-
- SILC_LOG_DEBUG(("Load PPM '%s'", filename));
-
- fd = open(filename, O_RDONLY, 0600);
- if (fd < 0) {
- fprintf(stderr, "open: %s: %s\n", strerror(errno), filename);
- return FALSE;
- }
-
- /* Read file header */
- memset(header, 0, sizeof(header));
- ret = read(fd, (void *)header, sizeof(header) - 1);
- if (ret < 0) {
- fprintf(stderr, "read: %s: %s\n", strerror(errno), filename);
- return FALSE;
- }
-
- /* Read width and height */
- ret = sscanf(header, "%s %ld %ld %ld\n", type,
- (unsigned long *)&map->width,
- (unsigned long *)&map->height,
- (unsigned long *)&map->maxcolor);
- if (ret < 4) {
- fprintf(stderr, "Invalid PPM file");
- retval = FALSE;
- goto out;
- }
-
- for (i = sizeof(header) - 1; i >= 0; i--)
- if (header[i] == '\n' || header[i] == ' ')
- break;
- lseek(fd, i + 1, SEEK_SET);
-
- /* Read the picture */
- map->bitmap_size = map->width * 3 * map->height;
- map->bitmap = silc_malloc(map->bitmap_size);
- ret = read(fd, map->bitmap, map->bitmap_size);
- if (ret < 0) {
- fprintf(stderr, "read: %s\n", strerror(errno));
- retval = FALSE;
- goto out;
- }
-
- out:
- close(fd);
- return retval;
-}
-
-/* Write the map into a bitmap file. */
-
-bool silc_map_write_ppm(SilcMap map, const char *filename)
-{
- int fd;
- int retval = TRUE;
- char header[80];
-
- SILC_LOG_DEBUG(("Write PPM '%s'", filename));
-
- fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0600);
- if (fd < 0) {
- fprintf(stderr, "open: %s: %s\n", strerror(errno), filename);
- return FALSE;
- }
-
- /* Write the header */
- memset(header, 0, sizeof(header));
- snprintf(header, sizeof(header) - 1, "P6 %ld %ld %ld\n",
- (unsigned long)map->width,
- (unsigned long)map->height,
- (unsigned long)map->maxcolor);
- write(fd, header, strlen(header));
-
- /* Write the bitmap */
- write(fd, map->bitmap, map->bitmap_size);
- close(fd);
-
- return retval;
-}
-
-/* Cut the map into a `width' * `height' size chunk at `x' and `y'. This
- returns the allocated map bitmap into `ret_bitmap'. The original map
- is not modified. */
-
-bool silc_map_cut(SilcMap map, SilcInt32 x, SilcInt32 y,
- SilcUInt32 width, SilcUInt32 height,
- SilcMap *ret_map)
-{
- int i;
-
- SILC_LOG_DEBUG(("cut"));
-
- /* Sanity checks */
- if (height > map->height - y) {
- fprintf(stderr, "Requesting too much height: %ld\n",
- (unsigned long)height);
- return FALSE;
- }
- if (width > map->width - x) {
- fprintf(stderr, "Requesting too much width: %ld\n",
- (unsigned long)width);
- return FALSE;
- }
-
- /* Compute coordinates in the bitmap */
- y = (map->width * 3) * y;
- x = (x * 3);
-
- /* Allocate new SilcMap context */
- *ret_map = silc_calloc(1, sizeof(**ret_map));
- (*ret_map)->width = width;
- (*ret_map)->height = height;
- (*ret_map)->maxcolor = map->maxcolor;
- (*ret_map)->bitmap_size = (width * 3) * height;
- (*ret_map)->bitmap = silc_malloc((*ret_map)->bitmap_size);
-
- /* Copy the requested area */
- for (i = 0; i < height; i++) {
- memcpy((*ret_map)->bitmap + (i * width * 3),
- map->bitmap + y + x, width * 3);
-
- /* Next line */
- y += (map->width * 3);
- }
-
- return TRUE;
-}
-
-/* Draw a bitmap indicated by `bitmap' of size of `width' * 'height'
- into the SilcMap context into the coordinates `x' and `y' (the upper left
- corner of the bitmap will be at x and y). The `bitmap' must be RGB
- color bitmap. */
-
-bool silc_map_draw(SilcMap map,
- SilcInt32 x, SilcInt32 y,
- const unsigned char *bitmap,
- SilcUInt32 width, SilcUInt32 height)
-{
- int i, k;
- unsigned char val;
-
- /* Compute coordinates in the bitmap */
- y = (map->width * 3) * y;
- x = (x * 3);
-
- /* Draw the bitmap into the map bitmap */
- for (i = 0; i < height; i++) {
- for (k = 0; k < width; k++) {
- val = bitmap[i * (width * 3) + (k * 3)];
- map->bitmap[y + x + (k * 3) ] = val; /* R */
-
- val = bitmap[i * (width * 3) + (k * 3) + 1];
- map->bitmap[y + x + (k * 3) + 1] = val; /* G */
-
- val = bitmap[i * (width * 3) + (k * 3) + 2];
- map->bitmap[y + x + (k * 3) + 2] = val; /* B */
- }
-
- /* Next line */
- y += (map->width * 3);
- }
-
- return TRUE;
-}
-
-/* Same as silc_map_draw but the `bitmap' is a grayscale bitmap
- and the RGB color information is provided as argument to this function. */
-
-bool silc_map_draw_raw(SilcMap map,
- SilcInt32 x, SilcInt32 y,
- const unsigned char *bitmap,
- SilcUInt32 width, SilcUInt32 height,
- SilcInt16 r, SilcInt16 g, SilcInt16 b)
-{
- int i, k;
- unsigned char val;
-
- /* Compute coordinates in the bitmap */
- y = (map->width * 3) * y;
- x = (x * 3);
-
- /* Draw the bitmap into the map bitmap */
- for (i = 0; i < height; i++) {
- for (k = 0; k < width; k++) {
- val = bitmap[i * width + k];
- if (val != 0) {
- map->bitmap[y + x + (k * 3) ] = r; /* R */
- map->bitmap[y + x + (k * 3) + 1] = g; /* G */
- map->bitmap[y + x + (k * 3) + 2] = b; /* B */
- }
- }
-
- /* Next line */
- y += (map->width * 3);
- }
-
- return TRUE;
-}
-
-/* Draw a straight line between points a and b. The coordinates for the
- points are provided as arguments. The `width' is the line width in
- pixels. The RGB color for the line can be provided too. Implements
- DDA algorithm. */
-
-bool silc_map_draw_line(SilcMap map, SilcUInt32 width,
- SilcInt32 a_x, SilcInt32 a_y,
- SilcInt32 b_x, SilcInt32 b_y,
- SilcInt16 r, SilcInt16 g, SilcInt16 b)
-{
- unsigned char p[3] = { r, g, b };
- int xdiff, ydiff, i;
- double x, y, slox, sloy;
-
- SILC_LOG_DEBUG(("draw_line"));
-
- /* Compute the difference of points */
- xdiff = b_x - a_x;
- ydiff = b_y - a_y;
- if (!xdiff && !ydiff)
- return FALSE;
-
- /* Draw the line */
- if (abs(xdiff) > abs(ydiff)) {
- sloy = (double)ydiff / (double)xdiff;
- y = a_y + 0.5; /* rounding */
- if (xdiff > 0) {
- for (x = a_x; x <= b_x; x++) {
- for (i = 0; i < width; i++)
- silc_map_draw(map, x + i, floor(y), p, 1, 1);
- y += sloy;
- }
- } else {
- for (x = a_x; x >= b_x; x--) {
- for (i = 0; i < width; i++)
- silc_map_draw(map, x + i, floor(y), p, 1, 1);
- y -= sloy;
- }
- }
- } else {
- slox = (double)xdiff / (double)ydiff;
- x = a_x + 0.5; /* rounding */
- if (ydiff > 0) {
- for (y = a_y; y <= b_y; y++) {
- for (i = 0; i < width; i++)
- silc_map_draw(map, floor(x + i), y, p, 1, 1);
- x += slox;
- }
- } else {
- for (y = a_y; y >= b_y; y--) {
- for (i = 0; i < width; i++)
- silc_map_draw(map, floor(x + i), y, p, 1, 1);
- x -= slox;
- }
- }
- }
-
- return TRUE;
-}
-
-/* Print the text string `text' on the bitmap at `x' and `y'. The color
- for the text can be provided as argument. */
-
-bool silc_map_draw_text(SilcMap map, const char *text,
- SilcInt32 x, SilcInt32 y,
- SilcInt16 r, SilcInt16 g, SilcInt16 b)
-{
- int k, w;
- int c;
-
- SILC_LOG_DEBUG(("draw_text"));
-
- /* Write the text. */
- w = 0;
- for (k = 0; k < strlen(text); k++) {
- c = text[k] - 33;
- silc_map_draw_raw(map, x + w, y,
- map->font.font[c].data,
- map->font.font[c].width,
- map->font.height, r, g, b);
- w += map->font.font[c].width;
- }
-
- return TRUE;
-}
-
-/* Draw circle on the bitmap map at `x' and `y'. The center of the
- circle will be at the `x' and `y'. If the `label' is provided the
- text will appear with the circle at `lposx' and `lposy' in relation
- with the circle. */
-
-bool silc_map_draw_circle(SilcMap map, SilcInt32 x, SilcInt32 y,
- SilcInt16 r, SilcInt16 g, SilcInt16 b,
- const char *label, SilcInt32 lposx, SilcInt32 lposy,
- SilcInt16 lr, SilcInt16 lg, SilcInt16 lb)
-{
- bool ret;
-
- SILC_LOG_DEBUG(("draw_circle"));
-
- y = y - (silc_map_circle.height / 2);
- x = x - (silc_map_circle.width / 2);
-
- ret = silc_map_draw_raw(map, x, y,
- silc_map_circle.data,
- silc_map_circle.width, silc_map_circle.height,
- r, g, b);
- if (!ret)
- return FALSE;
-
- if (label)
- ret = silc_map_draw_text(map, label, x + lposx, y - lposy, lr, lg, lb);
-
- return ret;
-}
-
-/* Draw rectangle on the bitmap map at `x' and `y'. The center of the
- rectangle will be at the `x' and `y'. If the `label' is provided the
- text will appear with the circle at `lposx' and `lposy' in relation
- with the circle. */
-
-bool silc_map_draw_rectangle(SilcMap map, SilcInt32 x, SilcInt32 y,
- SilcInt16 r, SilcInt16 g, SilcInt16 b,
- const char *label,
- SilcInt32 lposx, SilcInt32 lposy,
- SilcInt16 lr, SilcInt16 lg, SilcInt16 lb)
-{
- bool ret;
-
- SILC_LOG_DEBUG(("draw_rectangle"));
-
- y = y - (silc_map_rectangle.height / 2);
- x = x - (silc_map_rectangle.width / 2);
-
- ret = silc_map_draw_raw(map, x, y,
- silc_map_rectangle.data, silc_map_rectangle.width,
- silc_map_rectangle.height,
- r, g, b);
- if (!ret)
- return FALSE;
-
- if (label)
- ret = silc_map_draw_text(map, label, x + lposx, y - lposy, lr, lg, lb);
-
- return ret;
-}
-
-/* Parses the degree position string. For example, longitude 40 23 10,
- as in 40 degrees, 23 minutes and 10 seconds east. Negative degree is to
- West. For latitude positive is north and negative south. */
-
-double silc_map_parse_pos(char *pos)
-{
- double d = 0, m = 0, s = 0;
- int ret;
-
- ret = sscanf(pos, "%lf %lf %lf", &d, &m, &s);
- if (ret < 1) {
- fprintf(stderr, "Malfromed position string '%s'\n", pos);
- return 0;
- }
-
- if (d < 0) {
- m = (m < 0 ? m : -m);
- s = (s < 0 ? s : -s);
- }
-
- return ((d < 0 ? -1 : d > 0 ? 1 : 0) *
- abs(d) + (m / 60) + (s / 3600));
-}
-
-/* Converts longitude into position in the bitmap */
-
-int silc_map_lon2x(SilcMap map, char *longitude)
-{
- double meridian, aspmul, lon;
-
- /* Parse position string */
- lon = silc_map_parse_pos(longitude);
-
- /* Compute "aspect ratio multiplier" to get the position in the map. */
- meridian = (double)map->width / (double)2.0;
- aspmul = meridian / 180.0;
-
- /* Compute the position in the bitmap map */
- return (int)(double)(meridian + (lon * aspmul));
-}
-
-/* Converts latitude into position in the bitmap */
-
-int silc_map_lat2y(SilcMap map, char *latitude)
-{
- double meridian, aspmul, lat;
-
- /* Parse position string */
- lat = silc_map_parse_pos(latitude);
-
- /* Compute "aspect ratio multiplier" to get the position in the map. */
- meridian = (double)map->height / (double)2.0;
- aspmul = meridian / 90.0;
-
- /* Compute the position in the bitmap map */
- return (int)(double)(meridian - (lat * aspmul));
-}
-
-/* Parses RGB color string. */
-
-bool silc_map_parse_color(const char *color,
- SilcInt16 *r, SilcInt16 *g, SilcInt16 *b)
-{
- int ret;
- int rr, gg, bb;
-
- ret = sscanf(color, "%d %d %d", &rr, &gg, &bb);
- if (ret < 3) {
- fprintf(stderr, "Invalid color string: %s\n", color);
- return FALSE;
- }
-
- *r = (SilcInt16)rr;
- *g = (SilcInt16)gg;
- *b = (SilcInt16)bb;
-
- return TRUE;
-}
-
-/* Loads a font file. The font file format is the following:
-
- height\n
- width
- font data
- width
- font data
- etc.
-
- If this function is called multiple times the new font replaces the
- old font. */
-
-bool silc_map_load_font(SilcMap map, const char *filename)
-{
- FILE *fp;
- int i, x, y;
-
- /* Load the file */
- fp = fopen(filename, "r");
- if (!fp) {
- fprintf(stderr, "fopen: %s: %s\n", strerror(errno), filename);
- return FALSE;
- }
-
- /* Read the font height */
- i = fscanf(fp, "%d\n", &map->font.height);
- if (i < 1)
- return FALSE;
-
- /* Read the font data */
- for (i = 0; i < 94; i++) {
- map->font.font[i].width = fgetc(fp);
-
- for (y = 0; y < map->font.height; y++)
- for (x = 0; x < map->font.font[i].width; x++)
- map->font.font[i].data[(y * map->font.font[i].width) + x] = fgetc(fp);
- }
-
- return TRUE;
-}
projects / runtime.git / blobdiff