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src/theme/xbm/parse.c: generate cairo_surface

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This commit is contained in:
Johan Malm 2020-06-26 21:52:38 +01:00
parent f86394a997
commit 40e862f3ac
3 changed files with 60 additions and 6 deletions
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49
src/theme/xbm/parse.c
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@ -2,12 +2,35 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include "buf.h"
#include "xbm.h"
static unsigned char defaultcolor[] = { 127, 127, 127, 255 };
static unsigned char background[] = { 255, 255, 255, 255 };
static uint32_t *pixmap;
static void add_pixel(int position, unsigned char *rbga)
{
pixmap[position] = (rbga[3] << 24) | (rbga[0] << 16) | (rbga[1] << 8) |
rbga[0];
}
static void init_pixmap(int w, int h)
{
static bool has_run;
if (has_run)
return;
has_run = true;
pixmap = (uint32_t *)calloc(w * h, sizeof(uint32_t));
}
static void process_bytes(int height, int width, struct token *tokens)
{
init_pixmap(width, height);
struct token *t = tokens;
for (int row = 0; row < height; row++) {
int byte = 1;
@ -20,31 +43,49 @@ static void process_bytes(int height, int width, struct token *tokens)
return;
int value = (int)strtol(t->name, NULL, 0);
int bit = 1 << (col % 8);
if (value & bit)
if (value & bit) {
add_pixel(row * width + col, defaultcolor);
printf(".");
else
} else {
add_pixel(row * width + col, background);
printf(" ");
}
}
++t;
printf("\n");
}
}
void xbm_create_bitmap(struct token *tokens)
cairo_surface_t *xbm_create_bitmap(struct token *tokens)
{
cairo_surface_t *g_surface;
int width = 0, height = 0;
for (struct token *t = tokens; t->type; t++) {
if (width && height) {
if (t->type != TOKEN_INT)
continue;
process_bytes(width, height, t);
return;
goto out;
}
if (strstr(t->name, "width"))
width = atoi((++t)->name);
else if (strstr(t->name, "height"))
height = atoi((++t)->name);
}
out:
g_surface =
cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
if (!g_surface) {
fprintf(stderr, "no surface\n");
return NULL;
}
unsigned char *surface_data = cairo_image_surface_get_data(g_surface);
cairo_surface_flush(g_surface);
memcpy(surface_data, pixmap, width * height * 4);
free(pixmap);
cairo_surface_mark_dirty(g_surface);
return g_surface;
}
char *xbm_read_file(const char *filename)