static void
get_bw_scanline (guchar *bw, guchar *bgra0, guchar *bgra1, int width)
{
int i;
for (i = 0; i < width; i++) {
guchar *b = NULL;
guchar *d = NULL, *e = NULL;
if (i < width - 1) b = bgra0 + 4;
if (bgra1) {
if (i > 0) d = bgra1 - 4;
if (i < width - 1) e = bgra1 + 4;
}
if (floyd_steinberg_dither (bgra0, b, bgra1, d, e))
bw[i/8] |= 1 << (7 - (i % 8));
bgra0 += 4;
if (bgra1) bgra1 += 4;
}
}
bool ZLEwlImageManager::convertImageDirect(const std::string &stringData, ZLImageData &data) const {
unsigned char m0, m1;
m0 = *(stringData.data());
m1 = *(stringData.data()+1);
if((m0 == 0xff) && (m1 == 0xd8))
convertImageDirectJpeg(stringData, data);
else if(!png_sig_cmp((unsigned char *)stringData.data(), (png_size_t)0, 4) )
convertImageDirectPng(stringData, data);
else if(!strncmp(stringData.c_str(), "GIF", 3))
convertImageDirectGif(stringData, data);
else if(!strncmp(stringData.c_str(), "BM", 2))
convertImageDirectBmp(stringData, data);
else {
/*
printf("unsupported image format: %d %d\n", m0, m1);
FILE *f;
f = fopen("/tmp/unknown_img", "w+");
fwrite(stringData.data(), 1, stringData.length(), f);
fclose(f);
printf("image dumped to /tmp/unknown_img\n");
*/
data.init(10, 10);
bzero(((ZLEwlImageData&)data).getImageData(), 25);
return false;
}
ZLIntegerOption myDitherAlgo(ZLCategoryKey::LOOK_AND_FEEL, "Options", "DitherAlgo", 0);
if(myDitherAlgo.value() == 2)
floyd_steinberg_dither(data);
return true;
}
