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#include "icon.h"
#include <fcft/fcft.h>
#include <pixman.h>
#include <ctype.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#define PREMUL_ALPHA(chan, alpha) (chan * alpha + 127) / 255
/*
* Converts pixels from uint8_t[4] to uint32_t and
* straight alpha to premultiplied alpha.
*/
static uint32_t *
to_pixman(const uint8_t *src, int n_pixels, size_t *pix_size)
{
uint32_t *dest = NULL;
*pix_size = n_pixels * sizeof(uint32_t);
dest = malloc(*pix_size);
if (!dest)
return NULL;
for (int i = 0; i < n_pixels; i++) {
uint8_t a = src[i * 4 + 0];
uint8_t r = src[i * 4 + 1];
uint8_t g = src[i * 4 + 2];
uint8_t b = src[i * 4 + 3];
/*
* Skip premultiplying fully opaque and fully transparent
* pixels.
*/
if (a == 0) {
dest[i] = 0;
} else if (a == 255) {
dest[i] = ((uint32_t)a << 24) | ((uint32_t)r << 16) |
((uint32_t)g << 8) | ((uint32_t)b);
} else {
dest[i] = ((uint32_t)a << 24) |
((uint32_t)PREMUL_ALPHA(r, a) << 16) |
((uint32_t)PREMUL_ALPHA(g, a) << 8) |
((uint32_t)PREMUL_ALPHA(b, a));
}
}
return dest;
}
Icon *
createicon(const uint8_t *buf, int width, int height, int size)
{
Icon *icon = NULL;
int n_pixels;
pixman_image_t *img = NULL;
size_t pixbuf_size;
uint32_t *buf_pixman = NULL;
uint8_t *buf_orig = NULL;
n_pixels = size / 4;
icon = calloc(1, sizeof(Icon));
buf_orig = malloc(size);
buf_pixman = to_pixman(buf, n_pixels, &pixbuf_size);
if (!icon || !buf_orig || !buf_pixman)
goto fail;
img = pixman_image_create_bits(PIXMAN_a8r8g8b8, width, height,
buf_pixman, width * 4);
if (!img)
goto fail;
memcpy(buf_orig, buf, size);
icon->buf_orig = buf_orig;
icon->buf_pixman = buf_pixman;
icon->img = img;
icon->size_orig = size;
icon->size_pixman = pixbuf_size;
return icon;
fail:
free(buf_orig);
if (img)
pixman_image_unref(img);
free(buf_pixman);
free(icon);
return NULL;
}
void
destroyicon(Icon *icon)
{
if (icon->img)
pixman_image_unref(icon->img);
free(icon->buf_orig);
free(icon->buf_pixman);
free(icon);
}
FallbackIcon *
createfallbackicon(const char *appname, int fgcolor, struct fcft_font *font)
{
const struct fcft_glyph *glyph;
char initial;
if ((unsigned char)appname[0] > 127) {
/* first character is not ascii */
initial = '?';
} else {
initial = toupper(*appname);
}
glyph = fcft_rasterize_char_utf32(font, initial, FCFT_SUBPIXEL_DEFAULT);
if (!glyph)
return NULL;
return glyph;
}
int
resize_image(pixman_image_t *image, int new_width, int new_height)
{
int src_width = pixman_image_get_width(image);
int src_height = pixman_image_get_height(image);
pixman_transform_t transform;
pixman_fixed_t scale_x, scale_y;
if (src_width == new_width && src_height == new_height)
return 0;
scale_x = pixman_double_to_fixed((double)src_width / new_width);
scale_y = pixman_double_to_fixed((double)src_height / new_height);
pixman_transform_init_scale(&transform, scale_x, scale_y);
if (!pixman_image_set_filter(image, PIXMAN_FILTER_BEST, NULL, 0) ||
!pixman_image_set_transform(image, &transform)) {
return -1;
}
return 0;
}
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